diff --git a/sources/ewol/compositing/Area.cpp b/sources/ewol/compositing/Area.cpp
index f1338fcf..24e50187 100644
--- a/sources/ewol/compositing/Area.cpp
+++ b/sources/ewol/compositing/Area.cpp
@@ -15,13 +15,13 @@
 ewol::compositing::Area::Area(const ivec2& _size) :
   m_position(0.0, 0.0, 0.0),
   m_color(etk::color::white),
-  m_GLprogram(NULL),
+  m_GLprogram(nullptr),
   m_GLPosition(-1),
   m_GLMatrix(-1),
   m_GLColor(-1),
   m_GLtexture(-1),
   m_GLtexID(-1),
-  m_resource(NULL) {
+  m_resource(nullptr) {
 	m_resource = ewol::resource::Texture::keep();
 	m_resource->setImageSize(_size);
 	m_resource->flush();
@@ -37,7 +37,7 @@ void ewol::compositing::Area::loadProgram() {
 	// get the shader resource :
 	m_GLPosition = 0;
 	m_GLprogram = ewol::resource::Program::keep("DATA:textured3D.prog");
-	if (NULL != m_GLprogram) {
+	if (nullptr != m_GLprogram) {
 		m_GLPosition = m_GLprogram->getAttribute("EW_coord3d");
 		m_GLColor    = m_GLprogram->getAttribute("EW_color");
 		m_GLtexture  = m_GLprogram->getAttribute("EW_texture2d");
@@ -51,11 +51,11 @@ void ewol::compositing::Area::draw(bool _disableDepthTest) {
 		//EWOL_WARNING("Nothink to draw...");
 		return;
 	}
-	if (m_resource == NULL) {
+	if (m_resource == nullptr) {
 		// this is a normale case ... the user can choice to have no image ...
 		return;
 	}
-	if (m_GLprogram == NULL) {
+	if (m_GLprogram == nullptr) {
 		EWOL_ERROR("No shader ...");
 		return;
 	}
diff --git a/sources/ewol/compositing/Drawing.cpp b/sources/ewol/compositing/Drawing.cpp
index 1f2e5aed..ccbcb5a6 100644
--- a/sources/ewol/compositing/Drawing.cpp
+++ b/sources/ewol/compositing/Drawing.cpp
@@ -224,7 +224,7 @@ ewol::compositing::Drawing::Drawing() :
   m_clippingEnable(false),
   m_color(etk::color::black),
   m_colorBg(etk::color::none),
-  m_GLprogram(NULL),
+  m_GLprogram(nullptr),
   m_GLPosition(-1),
   m_GLMatrix(-1),
   m_GLColor(-1),
@@ -286,7 +286,7 @@ void ewol::compositing::Drawing::loadProgram() {
 	// oad the new ...
 	m_GLprogram = ewol::resource::Program::keep("DATA:color3.prog");
 	// get the shader resource :
-	if (NULL != m_GLprogram ) {
+	if (nullptr != m_GLprogram ) {
 		m_GLPosition = m_GLprogram->getAttribute("EW_coord3d");
 		m_GLColor    = m_GLprogram->getAttribute("EW_color");
 		m_GLMatrix   = m_GLprogram->getUniform("EW_MatrixTransformation");
@@ -299,7 +299,7 @@ void ewol::compositing::Drawing::draw(bool _disableDepthTest) {
 		//EWOL_WARNING("Nothink to draw...");
 		return;
 	}
-	if (m_GLprogram == NULL) {
+	if (m_GLprogram == nullptr) {
 		EWOL_ERROR("No shader ...");
 		return;
 	}
diff --git a/sources/ewol/compositing/Image.cpp b/sources/ewol/compositing/Image.cpp
index 7eabd9f2..ea713d4e 100644
--- a/sources/ewol/compositing/Image.cpp
+++ b/sources/ewol/compositing/Image.cpp
@@ -21,15 +21,15 @@ ewol::compositing::Image::Image(const std::string& _imageName, bool _df) :
   m_clippingEnable(false),
   m_color(etk::color::white),
   m_angle(0.0),
-  m_GLprogram(NULL),
+  m_GLprogram(nullptr),
   m_GLPosition(-1),
   m_GLMatrix(-1),
   m_GLColor(-1),
   m_GLtexture(-1),
   m_GLtexID(-1),
   m_distanceFieldMode(_df),
-  m_resource(NULL),
-  m_resourceDF(NULL) {
+  m_resource(nullptr),
+  m_resourceDF(nullptr) {
 	setSource(_imageName);
 	loadProgram();
 }
@@ -49,7 +49,7 @@ void ewol::compositing::Image::loadProgram() {
 	} else {
 		m_GLprogram = ewol::resource::Program::keep("DATA:textured3D.prog");
 	}
-	if (m_GLprogram != NULL) {
+	if (m_GLprogram != nullptr) {
 		m_GLPosition = m_GLprogram->getAttribute("EW_coord3d");
 		m_GLColor    = m_GLprogram->getAttribute("EW_color");
 		m_GLtexture  = m_GLprogram->getAttribute("EW_texture2d");
@@ -63,12 +63,12 @@ void ewol::compositing::Image::draw(bool _disableDepthTest) {
 		//EWOL_WARNING("Nothink to draw...");
 		return;
 	}
-	if (    m_resource == NULL
-	     && m_resourceDF == NULL) {
+	if (    m_resource == nullptr
+	     && m_resourceDF == nullptr) {
 		// this is a normale case ... the user can choice to have no image ...
 		return;
 	}
-	if (m_GLprogram == NULL) {
+	if (m_GLprogram == nullptr) {
 		EWOL_ERROR("No shader ...");
 		return;
 	}
@@ -82,7 +82,7 @@ void ewol::compositing::Image::draw(bool _disableDepthTest) {
 	m_GLprogram->use(); 
 	m_GLprogram->uniformMatrix4fv(m_GLMatrix, 1, tmpMatrix.m_mat);
 	// TextureID
-	if (m_resource != NULL) {
+	if (m_resource != nullptr) {
 		if (m_distanceFieldMode == true) {
 			EWOL_ERROR("FONT type error Request distance field and display normal ...");
 		}
@@ -253,31 +253,31 @@ void ewol::compositing::Image::setSource(const std::string& _newFile, const vec2
 	ewol::resource::ImageDF* resourceDF = m_resourceDF;
 	m_filename = _newFile;
 	m_requestSize = _size;
-	m_resource = NULL;
-	m_resourceDF = NULL;
+	m_resource = nullptr;
+	m_resourceDF = nullptr;
 	ivec2 tmpSize(_size.x(),_size.y());
 	// note that no image can be loaded...
 	if (_newFile != "") {
 		// link to new one
 		if (m_distanceFieldMode == false) {
 			m_resource = ewol::resource::TextureFile::keep(m_filename, tmpSize);
-			if (NULL == m_resource) {
+			if (nullptr == m_resource) {
 				EWOL_ERROR("Can not get Image resource");
 			}
 		} else {
 			m_resourceDF = ewol::resource::ImageDF::keep(m_filename, tmpSize);
-			if (NULL == m_resourceDF) {
+			if (nullptr == m_resourceDF) {
 				EWOL_ERROR("Can not get Image resource DF");
 			}
 		}
 	}
-	if (    m_resource == NULL
-	     && m_resourceDF == NULL) {
-		if (resource != NULL) {
+	if (    m_resource == nullptr
+	     && m_resourceDF == nullptr) {
+		if (resource != nullptr) {
 			EWOL_WARNING("Retrive previous resource");
 			m_resource = resource;
 		}
-		if (resourceDF != NULL) {
+		if (resourceDF != nullptr) {
 			EWOL_WARNING("Retrive previous resource (DF)");
 			m_resourceDF = resourceDF;
 		}
@@ -288,19 +288,19 @@ void ewol::compositing::Image::setSource(const std::string& _newFile, const vec2
 }
 
 bool ewol::compositing::Image::hasSources() {
-	return (m_resource != NULL || m_resourceDF != NULL);
+	return (m_resource != nullptr || m_resourceDF != NULL);
 }
 
 
 vec2 ewol::compositing::Image::getRealSize() {
-	if (    m_resource == NULL
-	     && m_resourceDF == NULL) {
+	if (    m_resource == nullptr
+	     && m_resourceDF == nullptr) {
 		return vec2(0,0);
 	}
-	if (m_resource != NULL) {
+	if (m_resource != nullptr) {
 		return m_resource->getRealSize();
 	}
-	if (m_resourceDF != NULL) {
+	if (m_resourceDF != nullptr) {
 		return m_resourceDF->getRealSize();
 	}
 	return vec2(0,0);
diff --git a/sources/ewol/compositing/Shaper.cpp b/sources/ewol/compositing/Shaper.cpp
index e972462a..ac74a6f4 100644
--- a/sources/ewol/compositing/Shaper.cpp
+++ b/sources/ewol/compositing/Shaper.cpp
@@ -15,21 +15,21 @@
 
 ewol::compositing::Shaper::Shaper(const std::string& _shaperName) :
   m_name(_shaperName),
-  m_config(NULL),
+  m_config(nullptr),
   m_confIdMode(-1),
   m_confIdDisplayOutside(-1),
   m_confIdChangeTime(-1),
   m_confProgramFile(-1),
   m_confColorFile(-1),
   m_confImageFile(-1),
-  m_GLprogram(NULL),
+  m_GLprogram(nullptr),
   m_GLPosition(-1),
   m_GLMatrix(-1),
   m_GLStateActivate(-1),
   m_GLStateOld(-1),
   m_GLStateNew(-1),
   m_GLStateTransition(-1),
-  m_resourceTexture(NULL),
+  m_resourceTexture(nullptr),
   m_nextStatusRequested(-1),
   m_propertyOrigin(0,0),
   m_propertySize(0,0),
@@ -85,7 +85,7 @@ void ewol::compositing::Shaper::loadProgram() {
 		return;
 	}
 	m_config = ewol::resource::ConfigFile::keep(m_name);
-	if (NULL != m_config) {
+	if (nullptr != m_config) {
 		m_confIdMode = m_config->request("mode");
 		m_confIdDisplayOutside = m_config->request("display-outside");
 		m_confIdPaddingOut[shaperPosLeft]   = m_config->request("padding-out-left");
@@ -119,7 +119,7 @@ void ewol::compositing::Shaper::loadProgram() {
 		// get the shader resource :
 		m_GLPosition = 0;
 		m_GLprogram = ewol::resource::Program::keep(tmpFilename);
-		if (m_GLprogram != NULL) {
+		if (m_GLprogram != nullptr) {
 			m_GLPosition        = m_GLprogram->getAttribute("EW_coord2d");
 			m_GLMatrix          = m_GLprogram->getUniform("EW_MatrixTransformation");
 			// Widget property  == > for the Vertex shader
@@ -159,8 +159,8 @@ void ewol::compositing::Shaper::loadProgram() {
 			EWOL_DEBUG("Shaper try load colorFile : '" << tmpFilename << "'");
 		}
 		m_colorProperty = ewol::resource::ColorFile::keep(tmpFilename);
-		if (    m_GLprogram != NULL
-		     && m_colorProperty != NULL) {
+		if (    m_GLprogram != nullptr
+		     && m_colorProperty != nullptr) {
 			std::vector<std::string> listColor = m_colorProperty->getColors();
 			for (auto tmpColor : listColor) {
 				int32_t glId = m_GLprogram->getUniform(tmpColor);
@@ -172,11 +172,11 @@ void ewol::compositing::Shaper::loadProgram() {
 }
 
 void ewol::compositing::Shaper::draw(bool _disableDepthTest) {
-	if (m_config == NULL) {
+	if (m_config == nullptr) {
 		// this is a normale case ... the user can choice to have no config basic file ...
 		return;
 	}
-	if (m_GLprogram == NULL) {
+	if (m_GLprogram == nullptr) {
 		EWOL_ERROR("No shader ...");
 		return;
 	}
@@ -197,7 +197,7 @@ void ewol::compositing::Shaper::draw(bool _disableDepthTest) {
 	for (auto element : m_listAssiciatedId) {
 		m_GLprogram->uniform(element.x(), m_colorProperty->get(element.y()));
 	}
-	if (NULL!=m_resourceTexture) {
+	if (nullptr!=m_resourceTexture) {
 		// TextureID
 		m_GLprogram->setTexture0(m_GLtexID, m_resourceTexture->getId());
 	}
@@ -471,7 +471,7 @@ void ewol::compositing::Shaper::setShape(const vec2& _origin, const vec2& _size,
 	EWOL_ERROR(" inside = " << inside);
 	*/
 	int32_t mode = 0;
-	if (m_config != NULL) {
+	if (m_config != nullptr) {
 		mode = m_config->getNumber(m_confIdMode);
 	}
 	bool displayOutside = m_config->getBoolean(m_confIdDisplayOutside);
@@ -572,7 +572,7 @@ ewol::Padding ewol::compositing::Shaper::getPadding() {
 
 ewol::Padding ewol::compositing::Shaper::getPaddingIn() {
 	ewol::Padding padding(0,0,0,0);
-	if (m_config != NULL) {
+	if (m_config != nullptr) {
 		padding.setValue(m_config->getNumber(m_confIdPaddingIn[shaperPosLeft]),
 		                 m_config->getNumber(m_confIdPaddingIn[shaperPosTop]),
 		                 m_config->getNumber(m_confIdPaddingIn[shaperPosRight]),
@@ -583,7 +583,7 @@ ewol::Padding ewol::compositing::Shaper::getPaddingIn() {
 
 ewol::Padding ewol::compositing::Shaper::getPaddingOut() {
 	ewol::Padding padding(0,0,0,0);
-	if (m_config != NULL) {
+	if (m_config != nullptr) {
 		padding.setValue(m_config->getNumber(m_confIdPaddingOut[shaperPosLeft]),
 		                 m_config->getNumber(m_confIdPaddingOut[shaperPosTop]),
 		                 m_config->getNumber(m_confIdPaddingOut[shaperPosRight]),
@@ -594,7 +594,7 @@ ewol::Padding ewol::compositing::Shaper::getPaddingOut() {
 
 ewol::Padding ewol::compositing::Shaper::getBorder() {
 	ewol::Padding padding(0,0,0,0);
-	if (m_config != NULL) {
+	if (m_config != nullptr) {
 		padding.setValue(m_config->getNumber(m_confIdBorder[shaperPosLeft]),
 		                 m_config->getNumber(m_confIdBorder[shaperPosTop]),
 		                 m_config->getNumber(m_confIdBorder[shaperPosRight]),
@@ -611,13 +611,13 @@ void ewol::compositing::Shaper::setSource(const std::string& _newFile) {
 }
 
 bool ewol::compositing::Shaper::hasSources() {
-	return m_GLprogram!=NULL;
+	return m_GLprogram!=nullptr;
 }
 
 
 const etk::Color<float>& ewol::compositing::Shaper::getColor(int32_t _id) {
 	static const etk::Color<float> errorValue(0,0,0,0);
-	if (m_colorProperty == NULL) {
+	if (m_colorProperty == nullptr) {
 		return errorValue;
 	}
 	return m_colorProperty->get(_id);
diff --git a/sources/ewol/compositing/Shaper.h b/sources/ewol/compositing/Shaper.h
index 2a57c434..f79f2809 100644
--- a/sources/ewol/compositing/Shaper.h
+++ b/sources/ewol/compositing/Shaper.h
@@ -233,7 +233,7 @@ namespace ewol {
 				 * @return The Id of the color
 				 */
 				int32_t requestColor(const std::string& _name) {
-					if (m_colorProperty == NULL) {
+					if (m_colorProperty == nullptr) {
 						return -1;
 					}
 					return m_colorProperty->request(_name);
@@ -251,7 +251,7 @@ namespace ewol {
 				 * @return The Id of the element
 				 */
 				int32_t requestConfig(const std::string& _name) {
-					if (m_config == NULL) {
+					if (m_config == nullptr) {
 						return -1;
 					}
 					return m_config->request(_name);
@@ -263,7 +263,7 @@ namespace ewol {
 				 */
 				double getConfigNumber(int32_t _id) {
 					if (    _id == -1
-					     || m_config == NULL) {
+					     || m_config == nullptr) {
 						return 0.0;
 					}
 					return m_config->getNumber(_id);
diff --git a/sources/ewol/compositing/Text.cpp b/sources/ewol/compositing/Text.cpp
index c7a160ea..6f72d269 100644
--- a/sources/ewol/compositing/Text.cpp
+++ b/sources/ewol/compositing/Text.cpp
@@ -16,7 +16,7 @@
 
 
 ewol::compositing::Text::Text(const std::string& _fontName, int32_t _fontSize) :
-  m_font(NULL) {
+  m_font(nullptr) {
 	setFont(_fontName, _fontSize);
 }
 
@@ -30,16 +30,16 @@ void ewol::compositing::Text::drawMT(const mat4& _transformationMatrix, bool _en
 	// draw BG in any case:
 	m_vectorialDraw.draw();
 	
-	if (m_coord.size() <= 0 || m_font == NULL) {
+	if (m_coord.size() <= 0 || m_font == nullptr) {
 		// TODO : a remĂtre ...
 		//EWOL_WARNING("Nothink to draw...");
 		return;
 	}
-	if (m_font == NULL) {
+	if (m_font == nullptr) {
 		EWOL_WARNING("no font...");
 		return;
 	}
-	if (m_GLprogram == NULL) {
+	if (m_GLprogram == nullptr) {
 		EWOL_ERROR("No shader ...");
 		return;
 	}
@@ -74,16 +74,16 @@ void ewol::compositing::Text::drawD(bool _disableDepthTest) {
 	// draw BG in any case:
 	m_vectorialDraw.draw();
 	
-	if (m_coord.size() <= 0 || m_font == NULL) {
+	if (m_coord.size() <= 0 || m_font == nullptr) {
 		// TODO : a remče ...
 		//EWOL_WARNING("Nothink to draw...");
 		return;
 	}
-	if (m_font == NULL) {
+	if (m_font == nullptr) {
 		EWOL_WARNING("no font...");
 		return;
 	}
-	if (m_GLprogram == NULL) {
+	if (m_GLprogram == nullptr) {
 		EWOL_ERROR("No shader ...");
 		return;
 	}
@@ -107,23 +107,23 @@ void ewol::compositing::Text::drawD(bool _disableDepthTest) {
 }
 
 float ewol::compositing::Text::getSize() {
-	if (m_font == NULL) {
+	if (m_font == nullptr) {
 		EWOL_WARNING("no font...");
 		return 1.0f;
 	}
 	return m_font->getFontSize();
 }
 float ewol::compositing::Text::getHeight() {
-	if (m_font == NULL) {
+	if (m_font == nullptr) {
 		EWOL_WARNING("no font...");
 		return 10.0f;
 	}
 	return m_font->getHeight(m_mode);
 }
 ewol::GlyphProperty * ewol::compositing::Text::getGlyphPointer(char32_t _charcode) {
-	if (m_font == NULL) {
+	if (m_font == nullptr) {
 		EWOL_WARNING("no font...");
-		return NULL;
+		return nullptr;
 	}
 	return m_font->getGlyphPointer(_charcode, m_mode);
 }
@@ -131,7 +131,7 @@ ewol::GlyphProperty * ewol::compositing::Text::getGlyphPointer(char32_t _charcod
 void ewol::compositing::Text::setFontSize(int32_t _fontSize) {
 	// get old size
 	std::string fontName = "";
-	if (m_font != NULL) {
+	if (m_font != nullptr) {
 		fontName = m_font->getName();
 		// Remove the :XX for the size ...
 		size_t pos = fontName.rfind(':');
@@ -143,7 +143,7 @@ void ewol::compositing::Text::setFontSize(int32_t _fontSize) {
 void ewol::compositing::Text::setFontName(const std::string& _fontName) {
 	// get old size
 	int32_t fontSize = -1;
-	if (m_font != NULL) {
+	if (m_font != nullptr) {
 		fontSize = m_font->getFontSize();
 	}
 	setFont(_fontName, fontSize);
@@ -164,7 +164,7 @@ void ewol::compositing::Text::setFont(std::string _fontName, int32_t _fontSize)
 	EWOL_VERBOSE("plop : " << _fontName << " size=" << _fontSize << " result :" << _fontName);
 	// link to new one
 	m_font = ewol::resource::TexturedFont::keep(_fontName);
-	if (m_font == NULL) {
+	if (m_font == nullptr) {
 		EWOL_ERROR("Can not get font resource");
 		m_font = previousFont;
 	} else {
@@ -173,7 +173,7 @@ void ewol::compositing::Text::setFont(std::string _fontName, int32_t _fontSize)
 }
 
 void ewol::compositing::Text::setFontMode(enum ewol::font::mode _mode) {
-	if (m_font != NULL) {
+	if (m_font != nullptr) {
 		m_mode = m_font->getWrappingMode(_mode);
 	}
 }
@@ -181,7 +181,7 @@ void ewol::compositing::Text::setFontMode(enum ewol::font::mode _mode) {
 void ewol::compositing::Text::printChar(const char32_t& _charcode) {
 	// get a pointer on the glyph property : 
 	ewol::GlyphProperty* myGlyph = getGlyphPointer(_charcode);
-	if (NULL == myGlyph) {
+	if (nullptr == myGlyph) {
 		EWOL_ERROR(" font does not really existed ...");
 		return;
 	}
diff --git a/sources/ewol/compositing/TextBase.cpp b/sources/ewol/compositing/TextBase.cpp
index 0a28774a..fe224779 100644
--- a/sources/ewol/compositing/TextBase.cpp
+++ b/sources/ewol/compositing/TextBase.cpp
@@ -32,7 +32,7 @@ ewol::compositing::TextBase::TextBase(const std::string& _shaderName, bool _load
   m_startTextpos(0),
   m_stopTextPos(0),
   m_alignement(alignDisable),
-  m_GLprogram(NULL),
+  m_GLprogram(nullptr),
   m_GLPosition(-1),
   m_GLMatrix(-1),
   m_GLColor(-1),
@@ -55,7 +55,7 @@ void ewol::compositing::TextBase::loadProgram(const std::string& _shaderName) {
 	m_GLPosition = 0;
 	ewol::resource::Program* old = m_GLprogram;
 	m_GLprogram = ewol::resource::Program::keep(_shaderName);
-	if (m_GLprogram != NULL) {
+	if (m_GLprogram != nullptr) {
 		m_GLPosition   = m_GLprogram->getAttribute("EW_coord3d");
 		m_GLColor      = m_GLprogram->getAttribute("EW_color");
 		m_GLtexture    = m_GLprogram->getAttribute("EW_texture2d");
@@ -66,7 +66,7 @@ void ewol::compositing::TextBase::loadProgram(const std::string& _shaderName) {
 	} else {
 		EWOL_ERROR("Can not load the program => keep previous one...");
 		m_GLprogram = old;
-		old = NULL;
+		old = nullptr;
 	}
 	// Release old program if needed ...
 	ewol::resource::Program::release(old);
@@ -249,7 +249,7 @@ void ewol::compositing::TextBase::print(const std::string& _text) {
 
 void ewol::compositing::TextBase::parseHtmlNode(exml::Element* _element) {
 	// get the static real pointer
-	if (_element == NULL) {
+	if (_element == nullptr) {
 		EWOL_ERROR( "Error Input node does not existed ...");
 	}
 	for(size_t iii=0; iii< _element->size(); iii++) {
@@ -265,7 +265,7 @@ void ewol::compositing::TextBase::parseHtmlNode(exml::Element* _element) {
 			continue;
 		}
 		exml::Element* elem = _element->getElement(iii);
-		if (elem == NULL) {
+		if (elem == nullptr) {
 			EWOL_ERROR("Cast error ...");
 			continue;
 		}
@@ -372,13 +372,13 @@ void ewol::compositing::TextBase::printHTML(const std::string& _text) {
 	}
 	
 	exml::Element* root = (exml::Element*)doc.getNamed( "html" );
-	if (root == NULL) {
+	if (root == nullptr) {
 		EWOL_ERROR( "can not load XML: main node not find: \"html\"");
 		doc.display();
 		return;
 	}
 	exml::Element* bodyNode = (exml::Element*)root->getNamed( "body" );
-	if (root == NULL) {
+	if (root == nullptr) {
 		EWOL_ERROR( "can not load XML: main node not find: \"body\"");
 		return;
 	}
@@ -400,13 +400,13 @@ void ewol::compositing::TextBase::printHTML(const std::u32string& _text) {
 	}
 	
 	exml::Element* root = (exml::Element*)doc.getNamed( "html" );
-	if (root == NULL) {
+	if (root == nullptr) {
 		EWOL_ERROR( "can not load XML: main node not find: \"html\"");
 		doc.display();
 		return;
 	}
 	exml::Element* bodyNode = (exml::Element*)root->getNamed( "body" );
-	if (root == NULL) {
+	if (root == nullptr) {
 		EWOL_ERROR( "can not load XML: main node not find: \"body\"");
 		return;
 	}
diff --git a/sources/ewol/compositing/TextDF.cpp b/sources/ewol/compositing/TextDF.cpp
index b574dc5f..c16c825e 100644
--- a/sources/ewol/compositing/TextDF.cpp
+++ b/sources/ewol/compositing/TextDF.cpp
@@ -17,7 +17,7 @@
 
 ewol::compositing::TextDF::TextDF(const std::string& _fontName, int32_t _fontSize) :
   ewol::compositing::TextBase("", false),
-  m_fontDF(NULL),
+  m_fontDF(nullptr),
   m_GLglyphLevel(-1),
   m_size(12.0) {
 	setFont(_fontName, _fontSize);
@@ -31,7 +31,7 @@ ewol::compositing::TextDF::~TextDF() {
 
 void ewol::compositing::TextDF::updateSizeToRender(const vec2& _size) {
 	float minSize = etk_min(_size.x(), _size.y());
-	if (m_fontDF != NULL) {
+	if (m_fontDF != nullptr) {
 		setFontSize(m_fontDF->getSize(minSize));
 	}
 }
@@ -42,15 +42,15 @@ void ewol::compositing::TextDF::drawMT(const mat4& _transformationMatrix, bool _
 	// draw BG in any case:
 	m_vectorialDraw.draw();
 	
-	if (m_coord.size() <= 0 || m_fontDF == NULL) {
+	if (m_coord.size() <= 0 || m_fontDF == nullptr) {
 		//EWOL_WARNING("Nothink to draw...");
 		return;
 	}
-	if (m_fontDF == NULL) {
+	if (m_fontDF == nullptr) {
 		EWOL_WARNING("no font...");
 		return;
 	}
-	if (m_GLprogram == NULL) {
+	if (m_GLprogram == nullptr) {
 		EWOL_ERROR("No shader ...");
 		return;
 	}
@@ -84,16 +84,16 @@ void ewol::compositing::TextDF::drawD(bool _disableDepthTest) {
 	// draw BG in any case:
 	m_vectorialDraw.draw();
 	
-	if (m_coord.size() <= 0 || m_fontDF == NULL) {
+	if (m_coord.size() <= 0 || m_fontDF == nullptr) {
 		// TODO : a remètre ...
 		//EWOL_WARNING("Nothink to draw...");
 		return;
 	}
-	if (m_fontDF == NULL) {
+	if (m_fontDF == nullptr) {
 		EWOL_WARNING("no font...");
 		return;
 	}
-	if (m_GLprogram == NULL) {
+	if (m_GLprogram == nullptr) {
 		EWOL_ERROR("No shader ...");
 		return;
 	}
@@ -120,14 +120,14 @@ void ewol::compositing::TextDF::clear() {
 }
 void ewol::compositing::TextDF::loadProgram(const std::string& _shaderName) {
 	ewol::compositing::TextBase::loadProgram(_shaderName);
-	if (m_GLprogram != NULL) {
+	if (m_GLprogram != nullptr) {
 		m_GLglyphLevel = m_GLprogram->getAttribute("EW_glyphLevel");
 	}
 }
 
 
 float ewol::compositing::TextDF::getHeight() {
-	if (m_fontDF == NULL) {
+	if (m_fontDF == nullptr) {
 		EWOL_WARNING("no font...");
 		return 1;
 	}
@@ -135,9 +135,9 @@ float ewol::compositing::TextDF::getHeight() {
 }
 
 ewol::GlyphProperty * ewol::compositing::TextDF::getGlyphPointer(char32_t _charcode) {
-	if (m_fontDF == NULL) {
+	if (m_fontDF == nullptr) {
 		EWOL_WARNING("no font...");
-		return NULL;
+		return nullptr;
 	}
 	return m_fontDF->getGlyphPointer(_charcode);
 }
@@ -165,7 +165,7 @@ void ewol::compositing::TextDF::setFontName(const std::string& _fontName) {
 	EWOL_VERBOSE("Set font name: '" << fontName << "'");
 	// link to new one
 	m_fontDF = ewol::resource::DistanceFieldFont::keep(fontName);
-	if (m_fontDF == NULL) {
+	if (m_fontDF == nullptr) {
 		EWOL_ERROR("Can not get find resource");
 		m_fontDF = previousFont;
 	} else {
@@ -189,7 +189,7 @@ void ewol::compositing::TextDF::setFontMode(enum ewol::font::mode _mode) {
 void ewol::compositing::TextDF::printChar(const char32_t& _charcode) {
 	// get a pointer on the glyph property : 
 	ewol::GlyphProperty* myGlyph = getGlyphPointer(_charcode);
-	if (NULL == myGlyph) {
+	if (nullptr == myGlyph) {
 		EWOL_ERROR(" font does not really existed ...");
 		return;
 	}
diff --git a/sources/ewol/context/Android/Context.cpp b/sources/ewol/context/Android/Context.cpp
index 2336932f..e2650b68 100644
--- a/sources/ewol/context/Android/Context.cpp
+++ b/sources/ewol/context/Android/Context.cpp
@@ -23,7 +23,7 @@
 
 int64_t ewol::getTime() {
 	struct timeval	now;
-	gettimeofday(&now, NULL);
+	gettimeofday(&now, nullptr);
 	//EWOL_VERBOSE("current time : " << now.tv_sec << "s " << now.tv_usec << "us");
 	return (int64_t)((int64_t)now.tv_sec*(int64_t)1000000 + (int64_t)now.tv_usec);
 }
@@ -31,7 +31,7 @@ int64_t ewol::getTime() {
 
 // jni doc : /usr/lib/jvm/java-1.6.0-openjdk/include
 
-static JavaVM* g_JavaVM=NULL; // global acces on the unique JVM !!!
+static JavaVM* g_JavaVM=nullptr; // global acces on the unique JVM !!!
 etk::Mutex g_interfaceMutex;
 etk::Mutex g_interfaceAudioMutex;
 
@@ -78,10 +78,10 @@ class AndroidContext : public ewol::Context {
 	private:
 		bool safeInitMethodID(jmethodID& _mid, jclass& _cls, const char* _name, const char* _sign) {
 			_mid = m_JavaVirtualMachinePointer->GetMethodID(_cls, _name, _sign);
-			if(_mid == NULL) {
+			if(_mid == nullptr) {
 				EWOL_ERROR("C->java : Can't find the method " << _name);
 				/* remove access on the virtual machine : */
-				m_JavaVirtualMachinePointer = NULL;
+				m_JavaVirtualMachinePointer = nullptr;
 				return false;
 			}
 			return true;
@@ -89,7 +89,7 @@ class AndroidContext : public ewol::Context {
 	public:
 		AndroidContext(JNIEnv* _env, jclass _classBase, jobject _objCallback, enum application _typeAPPL) :
 		  m_javaApplicationType(_typeAPPL),
-		  m_JavaVirtualMachinePointer(NULL),
+		  m_JavaVirtualMachinePointer(nullptr),
 		  m_javaClassEwol(0),
 		  m_javaClassEwolCallback(0),
 		  m_javaObjectEwolCallback(0),
@@ -108,8 +108,8 @@ class AndroidContext : public ewol::Context {
 		  m_javaDefaultClassString(0),
 		  m_currentHeight(0),
 		  m_clipBoardOwnerStd(false),
-		  m_audioCallBack(NULL),
-		  m_audioCallBackUserData(NULL) {
+		  m_audioCallBack(nullptr),
+		  m_audioCallBackUserData(nullptr) {
 			EWOL_DEBUG("*******************************************");
 			if (m_javaApplicationType == appl_application) {
 				EWOL_DEBUG("** set JVM Pointer (application)         **");
@@ -119,21 +119,21 @@ class AndroidContext : public ewol::Context {
 			EWOL_DEBUG("*******************************************");
 			m_JavaVirtualMachinePointer = _env;
 			// get default needed all time elements : 
-			if (NULL != m_JavaVirtualMachinePointer) {
+			if (nullptr != m_JavaVirtualMachinePointer) {
 				EWOL_DEBUG("C->java : try load org/ewol/Ewol class");
 				m_javaClassEwol = m_JavaVirtualMachinePointer->FindClass("org/ewol/Ewol" );
 				if (m_javaClassEwol == 0) {
 					EWOL_ERROR("C->java : Can't find org/ewol/Ewol class");
 					// remove access on the virtual machine : 
-					m_JavaVirtualMachinePointer = NULL;
+					m_JavaVirtualMachinePointer = nullptr;
 					return;
 				}
 				/* The object field extends Activity and implement EwolCallback */
 				m_javaClassEwolCallback = m_JavaVirtualMachinePointer->GetObjectClass(_objCallback);
-				if(m_javaClassEwolCallback == NULL) {
+				if(m_javaClassEwolCallback == nullptr) {
 					EWOL_ERROR("C->java : Can't find org/ewol/EwolCallback class");
 					// remove access on the virtual machine : 
-					m_JavaVirtualMachinePointer = NULL;
+					m_JavaVirtualMachinePointer = nullptr;
 					return;
 				}
 				bool functionCallbackIsMissing = false;
@@ -258,7 +258,7 @@ class AndroidContext : public ewol::Context {
 				
 				m_javaObjectEwolCallback = _env->NewGlobalRef(_objCallback);
 				//javaObjectEwolCallbackAndActivity = objCallback;
-				if (m_javaObjectEwolCallback == NULL) {
+				if (m_javaObjectEwolCallback == nullptr) {
 					functionCallbackIsMissing = true;
 				}
 				
@@ -266,7 +266,7 @@ class AndroidContext : public ewol::Context {
 				if (m_javaDefaultClassString == 0) {
 					EWOL_ERROR("C->java : Can't find java/lang/String" );
 					// remove access on the virtual machine : 
-					m_JavaVirtualMachinePointer = NULL;
+					m_JavaVirtualMachinePointer = nullptr;
 					functionCallbackIsMissing = true;
 				}
 				if (functionCallbackIsMissing == true) {
@@ -281,7 +281,7 @@ class AndroidContext : public ewol::Context {
 		
 		void unInit(JNIEnv* _env) {
 			_env->DeleteGlobalRef(m_javaObjectEwolCallback);
-			m_javaObjectEwolCallback = NULL;
+			m_javaObjectEwolCallback = nullptr;
 		}
 		
 		int32_t run() {
@@ -387,7 +387,7 @@ class AndroidContext : public ewol::Context {
 				}
 				//Call java ...
 				jstring returnString = (jstring) m_JavaVirtualMachinePointer->CallObjectMethod(m_javaObjectEwolCallback, m_javaMethodEwolActivityAudioGetDeviceProperty, _idDevice);
-				const char *js = m_JavaVirtualMachinePointer->GetStringUTFChars(returnString, NULL);
+				const char *js = m_JavaVirtualMachinePointer->GetStringUTFChars(returnString, nullptr);
 				std::string retString(js);
 				m_JavaVirtualMachinePointer->ReleaseStringUTFChars(returnString, js);
 				//m_JavaVirtualMachinePointer->DeleteLocalRef(returnString);
@@ -410,7 +410,7 @@ class AndroidContext : public ewol::Context {
 		                     int32_t _format,
 		                     AndroidAudioCallback _callback,
 		                     void* _userData) {
-			if (m_audioCallBack != NULL) {
+			if (m_audioCallBack != nullptr) {
 				EWOL_ERROR("AudioCallback already started ...");
 				return false;
 			}
@@ -437,7 +437,7 @@ class AndroidContext : public ewol::Context {
 			return false;
 		}
 		bool audioCloseDevice(int32_t _idDevice) {
-			if (m_audioCallBack == NULL) {
+			if (m_audioCallBack == nullptr) {
 				EWOL_ERROR("AudioCallback Not started ...");
 				return false;
 			}
@@ -453,8 +453,8 @@ class AndroidContext : public ewol::Context {
 				// manage execption : 
 				java_check_exception(m_JavaVirtualMachinePointer);
 				java_detach_current_thread(status);
-				m_audioCallBack = NULL;
-				m_audioCallBackUserData = NULL;
+				m_audioCallBack = nullptr;
+				m_audioCallBackUserData = nullptr;
 				return (bool)ret;
 			} else {
 				EWOL_ERROR("C->java : can not get audio device count");
@@ -464,9 +464,9 @@ class AndroidContext : public ewol::Context {
 	private:
 		bool java_attach_current_thread(int *_rstatus) {
 			EWOL_DEBUG("C->java : call java");
-			if (g_JavaVM == NULL) {
+			if (g_JavaVM == nullptr) {
 				EWOL_ERROR("C->java : JVM not initialised");
-				m_JavaVirtualMachinePointer = NULL;
+				m_JavaVirtualMachinePointer = nullptr;
 				return false;
 			}
 			*_rstatus = g_JavaVM->GetEnv((void **) &m_JavaVirtualMachinePointer, JNI_VERSION_1_6);
@@ -474,12 +474,12 @@ class AndroidContext : public ewol::Context {
 				JavaVMAttachArgs lJavaVMAttachArgs;
 				lJavaVMAttachArgs.version = JNI_VERSION_1_6;
 				lJavaVMAttachArgs.name = "EwolNativeThread";
-				lJavaVMAttachArgs.group = NULL; 
+				lJavaVMAttachArgs.group = nullptr; 
 				int status = g_JavaVM->AttachCurrentThread(&m_JavaVirtualMachinePointer, &lJavaVMAttachArgs);
 				java_check_exception(m_JavaVirtualMachinePointer);
 				if (status != JNI_OK) {
 					EWOL_ERROR("C->java : AttachCurrentThread failed : " << status);
-					m_JavaVirtualMachinePointer = NULL;
+					m_JavaVirtualMachinePointer = nullptr;
 					return false;
 				}
 			}
@@ -489,7 +489,7 @@ class AndroidContext : public ewol::Context {
 		void java_detach_current_thread(int _status) {
 			if(_status == JNI_EDETACHED) {
 				g_JavaVM->DetachCurrentThread();
-				m_JavaVirtualMachinePointer = NULL;
+				m_JavaVirtualMachinePointer = nullptr;
 			}
 		}
 		
@@ -568,7 +568,7 @@ class AndroidContext : public ewol::Context {
 				return;
 			}
 			EWOL_DEBUG("C->java : 222");
-			if (NULL == _dataString) {
+			if (nullptr == _dataString) {
 				EWOL_ERROR("C->java : No data to send ...");
 				return;
 			}
@@ -631,7 +631,7 @@ class AndroidContext : public ewol::Context {
 		}
 		
 		void audioPlayback(void* _dataOutput, int32_t _frameRate) {
-			if (m_audioCallBack != NULL) {
+			if (m_audioCallBack != nullptr) {
 				//EWOL_DEBUG("IO Audio event request: Frames=" << _frameRate);
 				m_audioCallBack(_dataOutput, _frameRate, m_audioCallBackUserData);
 			}
@@ -654,7 +654,7 @@ extern "C" {
 	JNIEXPORT void JNICALL JNI_OnUnload(JavaVM* _vm, void *_reserved) {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		etk::AutoLockMutex myLock2(g_interfaceAudioMutex);
-		g_JavaVM = NULL;
+		g_JavaVM = nullptr;
 		EWOL_DEBUG("JNI-> Un-load the jvm ..." );
 	}
 	
@@ -667,7 +667,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -680,7 +680,7 @@ extern "C" {
 		if (isCopy == JNI_TRUE) {
 			// from here str is reset ...
 			_env->ReleaseStringUTFChars(_myString, str);
-			str = NULL;
+			str = nullptr;
 		}
 	}
 	
@@ -692,7 +692,7 @@ extern "C" {
 		EWOL_DEBUG("*******************************************");
 		EWOL_DEBUG("** Creating EWOL context                 **");
 		EWOL_DEBUG("*******************************************");
-		AndroidContext* tmpContext = NULL;
+		AndroidContext* tmpContext = nullptr;
 		if (org_ewol_EwolConstants_EWOL_APPL_TYPE_ACTIVITY == _typeApplication) {
 			tmpContext = new AndroidContext(_env, _classBase, _objCallback, AndroidContext::appl_application);
 		} else if (org_ewol_EwolConstants_EWOL_APPL_TYPE_WALLPAPER == _typeApplication) {
@@ -701,7 +701,7 @@ extern "C" {
 			EWOL_CRITICAL(" try to create an instance with no apply type: " << _typeApplication);
 			return -1;
 		}
-		if (NULL == tmpContext) {
+		if (nullptr == tmpContext) {
 			EWOL_ERROR("Can not allocate the main context instance _id=" << (s_listInstance.size()-1));
 			return -1;
 		}
@@ -721,20 +721,20 @@ extern "C" {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			return;
 		}
-		if (NULL == s_listInstance[_id]) {
+		if (nullptr == s_listInstance[_id]) {
 			EWOL_ERROR("the requested instance _id=" << (int32_t)_id << " is already removed ...");
 			return;
 		}
 		s_listInstance[_id]->unInit(_env);
 		delete(s_listInstance[_id]);
-		s_listInstance[_id]=NULL;
+		s_listInstance[_id]=nullptr;
 	}
 	void Java_org_ewol_Ewol_EWtouchEvent(JNIEnv* _env, jobject _thiz, jint _id) {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		EWOL_DEBUG("  == > Touch Event");
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -749,7 +749,7 @@ extern "C" {
 		EWOL_DEBUG("*******************************************");
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -764,7 +764,7 @@ extern "C" {
 		EWOL_DEBUG("*******************************************");
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -778,7 +778,7 @@ extern "C" {
 		EWOL_DEBUG("*******************************************");
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -791,7 +791,7 @@ extern "C" {
 		EWOL_DEBUG("*******************************************");
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -805,7 +805,7 @@ extern "C" {
 		EWOL_DEBUG("*******************************************");
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -821,7 +821,7 @@ extern "C" {
 		EWOL_DEBUG("*******************************************");
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -835,7 +835,7 @@ extern "C" {
 		EWOL_DEBUG("*******************************************");
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -857,7 +857,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -875,7 +875,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -892,7 +892,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -910,7 +910,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -925,7 +925,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -941,7 +941,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -958,7 +958,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -975,7 +975,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -993,7 +993,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return false;
@@ -1037,7 +1037,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -1052,7 +1052,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -1067,7 +1067,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -1084,7 +1084,7 @@ extern "C" {
 		etk::AutoLockMutex myLock(g_interfaceAudioMutex);
 		if(    _id >= s_listInstance.size()
 		    || _id<0
-		    || NULL == s_listInstance[_id] ) {
+		    || nullptr == s_listInstance[_id] ) {
 			EWOL_ERROR("Call C With an incorrect instance _id=" << (int32_t)_id);
 			// TODO : generate error in java to stop the current instance
 			return;
@@ -1092,7 +1092,7 @@ extern "C" {
 		// get the short* pointer from the Java array
 		jboolean isCopy;
 		jshort* dst = _env->GetShortArrayElements(_location, &isCopy);
-		if (NULL != dst) {
+		if (nullptr != dst) {
 			memset(dst, sizeof(jshort), _frameRate*_nbChannels);
 			//EWOL_DEBUG("IO Audio event request: Frames=" << _frameRate << " channels=" << _nbChannels);
 			s_listInstance[_id]->audioPlayback(dst, _frameRate);
diff --git a/sources/ewol/context/Context.cpp b/sources/ewol/context/Context.cpp
index 72d7d333..183ba2b4 100644
--- a/sources/ewol/context/Context.cpp
+++ b/sources/ewol/context/Context.cpp
@@ -45,10 +45,10 @@ static etk::Mutex& mutexInterface() {
 }
 
 
-static ewol::Context* l_curentInterface=NULL;
+static ewol::Context* l_curentInterface=nullptr;
 ewol::Context& ewol::getContext() {
 	#if DEBUG_LEVEL > 2
-		if(NULL == l_curentInterface){
+		if(nullptr == l_curentInterface){
 			EWOL_CRITICAL("[CRITICAL] try acces at an empty interface");
 		}
 	#endif
@@ -73,11 +73,11 @@ void ewol::Context::lockContext() {
 }
 
 /**
- * @brief set the curent interface at NULL.
+ * @brief set the curent interface at nullptr.
  * @note this un-lock the main mutex
  */
 void ewol::Context::unLockContext() {
-	l_curentInterface = NULL;
+	l_curentInterface = nullptr;
 	mutexInterface().unLock();
 }
 
@@ -152,12 +152,12 @@ void ewol::Context::inputEventUnGrabPointer() {
 void ewol::Context::processEvents() {
 	int32_t nbEvent = 0;
 	//EWOL_DEBUG(" ********  Event");
-	ewol::eSystemMessage* data = NULL;
+	ewol::eSystemMessage* data = nullptr;
 	while (m_msgSystem.count()>0) {
 		nbEvent++;
-		if (data != NULL) {
+		if (data != nullptr) {
 			delete(data);
-			data = NULL;
+			data = nullptr;
 		}
 		m_msgSystem.wait(data);
 		//EWOL_DEBUG("EVENT");
@@ -190,14 +190,14 @@ void ewol::Context::processEvents() {
 				//EWOL_DEBUG("Receive MSG : THREAD_KEYBORAD_KEY");
 				// store the keyboard special key status for mouse event...
 				m_input.setLastKeyboardSpecial(data->keyboardSpecial);
-				if (NULL != m_windowsCurrent) {
+				if (nullptr != m_windowsCurrent) {
 					if (false == m_windowsCurrent->onEventShortCut(data->keyboardSpecial,
 					                                             data->keyboardChar,
 					                                             data->keyboardMove,
 					                                             data->stateIsDown) ) {
 						// get the current focused Widget :
 						ewol::object::Shared<ewol::Widget> tmpWidget = m_widgetManager.focusGet();
-						if (NULL != tmpWidget) {
+						if (nullptr != tmpWidget) {
 							// check if the widget allow repeating key events.
 							//EWOL_DEBUG("repeating test :" << data->repeateKey << " widget=" << tmpWidget->getKeyboardRepeate() << " state=" << data->stateIsDown);
 							if(    false == data->repeateKey
@@ -240,7 +240,7 @@ void ewol::Context::processEvents() {
 			case eSystemMessage::msgClipboardArrive:
 				{
 					ewol::object::Shared<ewol::Widget> tmpWidget = m_widgetManager.focusGet();
-					if (tmpWidget != NULL) {
+					if (tmpWidget != nullptr) {
 						tmpWidget->onEventClipboard(data->clipboardID);
 					}
 				}
@@ -299,7 +299,7 @@ ewol::Context::Context(int32_t _argc, const char* _argv[]) :
   m_FpsSystemContext("Context   ", false),
   m_FpsSystem(       "Draw      ", true),
   m_FpsFlush(        "Flush     ", false),
-  m_windowsCurrent(NULL),
+  m_windowsCurrent(nullptr),
   m_windowsSize(320,480),
   m_initStepId(0),
   m_initTotalStep(1) {
@@ -354,7 +354,7 @@ ewol::Context::Context(int32_t _argc, const char* _argv[]) :
 	// request the init of the application in the main context of openGL ...
 	{
 		ewol::eSystemMessage *data = new ewol::eSystemMessage();
-		if (data == NULL) {
+		if (data == nullptr) {
 			EWOL_ERROR("allocationerror of message");
 		} else {
 			data->TypeMessage = eSystemMessage::msgInit;
@@ -399,7 +399,7 @@ ewol::Context::~Context() {
 
 void ewol::Context::requestUpdateSize() {
 	ewol::eSystemMessage *data = new ewol::eSystemMessage();
-	if (data == NULL) {
+	if (data == nullptr) {
 		EWOL_ERROR("allocationerror of message");
 		return;
 	}
@@ -411,7 +411,7 @@ void ewol::Context::OS_Resize(const vec2& _size) {
 	// TODO : Better in the thread ...  == > but generate some init error ...
 	ewol::Dimension::setPixelWindowsSize(_size);
 	ewol::eSystemMessage *data = new ewol::eSystemMessage();
-	if (data == NULL) {
+	if (data == nullptr) {
 		EWOL_ERROR("allocationerror of message");
 		return;
 	}
@@ -431,7 +431,7 @@ void ewol::Context::OS_Move(const vec2& _pos) {
 
 void ewol::Context::OS_SetInputMotion(int _pointerID, const vec2& _pos ) {
 	ewol::eSystemMessage *data = new ewol::eSystemMessage();
-	if (data == NULL) {
+	if (data == nullptr) {
 		EWOL_ERROR("allocationerror of message");
 		return;
 	}
@@ -444,7 +444,7 @@ void ewol::Context::OS_SetInputMotion(int _pointerID, const vec2& _pos ) {
 
 void ewol::Context::OS_SetInputState(int _pointerID, bool _isDown, const vec2& _pos ) {
 	ewol::eSystemMessage *data = new ewol::eSystemMessage();
-	if (data == NULL) {
+	if (data == nullptr) {
 		EWOL_ERROR("allocationerror of message");
 		return;
 	}
@@ -458,7 +458,7 @@ void ewol::Context::OS_SetInputState(int _pointerID, bool _isDown, const vec2& _
 
 void ewol::Context::OS_SetMouseMotion(int _pointerID, const vec2& _pos ) {
 	ewol::eSystemMessage *data = new ewol::eSystemMessage();
-	if (data == NULL) {
+	if (data == nullptr) {
 		EWOL_ERROR("allocationerror of message");
 		return;
 	}
@@ -471,7 +471,7 @@ void ewol::Context::OS_SetMouseMotion(int _pointerID, const vec2& _pos ) {
 
 void ewol::Context::OS_SetMouseState(int _pointerID, bool _isDown, const vec2& _pos ) {
 	ewol::eSystemMessage *data = new ewol::eSystemMessage();
-	if (data == NULL) {
+	if (data == nullptr) {
 		EWOL_ERROR("allocationerror of message");
 		return;
 	}
@@ -488,7 +488,7 @@ void ewol::Context::OS_SetKeyboard(ewol::key::Special& _special,
                                     bool _isDown,
                                     bool _isARepeateKey) {
 	ewol::eSystemMessage *data = new ewol::eSystemMessage();
-	if (data == NULL) {
+	if (data == nullptr) {
 		EWOL_ERROR("allocationerror of message");
 		return;
 	}
@@ -505,7 +505,7 @@ void ewol::Context::OS_SetKeyboardMove(ewol::key::Special& _special,
                                         bool _isDown,
                                         bool _isARepeateKey) {
 	ewol::eSystemMessage *data = new ewol::eSystemMessage();
-	if (data == NULL) {
+	if (data == nullptr) {
 		EWOL_ERROR("allocationerror of message");
 		return;
 	}
@@ -519,7 +519,7 @@ void ewol::Context::OS_SetKeyboardMove(ewol::key::Special& _special,
 
 void ewol::Context::OS_Hide() {
 	ewol::eSystemMessage *data = new ewol::eSystemMessage();
-	if (data == NULL) {
+	if (data == nullptr) {
 		EWOL_ERROR("allocationerror of message");
 		return;
 	}
@@ -529,7 +529,7 @@ void ewol::Context::OS_Hide() {
 
 void ewol::Context::OS_Show() {
 	ewol::eSystemMessage *data = new ewol::eSystemMessage();
-	if (data == NULL) {
+	if (data == nullptr) {
 		EWOL_ERROR("allocationerror of message");
 		return;
 	}
@@ -540,7 +540,7 @@ void ewol::Context::OS_Show() {
 
 void ewol::Context::OS_ClipBoardArrive(enum ewol::context::clipBoard::clipboardListe _clipboardID) {
 	ewol::eSystemMessage *data = new ewol::eSystemMessage();
-	if (data == NULL) {
+	if (data == nullptr) {
 		EWOL_ERROR("allocationerror of message");
 		return;
 	}
@@ -572,7 +572,7 @@ bool ewol::Context::OS_Draw(bool _displayEveryTime) {
 		processEvents();
 		if (m_initStepId < m_initTotalStep) {
 			ewol::eSystemMessage *data = new ewol::eSystemMessage();
-			if (data == NULL) {
+			if (data == nullptr) {
 				EWOL_ERROR("allocation error of message");
 			} else {
 				data->TypeMessage = eSystemMessage::msgInit;
@@ -586,7 +586,7 @@ bool ewol::Context::OS_Draw(bool _displayEveryTime) {
 		//! ewol::object::Shared<ewol::Object>Manager::removeAllAutoRemove();
 		m_objectManager.removeAllAutoRemove();
 		// check if the user selected a windows
-		if (NULL != m_windowsCurrent) {
+		if (nullptr != m_windowsCurrent) {
 			// Redraw all needed elements
 			m_windowsCurrent->onRegenerateDisplay();
 		}
@@ -607,7 +607,7 @@ bool ewol::Context::OS_Draw(bool _displayEveryTime) {
 		if (m_displayFps == true) {
 			m_FpsSystemContext.tic();
 		}
-		if (NULL != m_windowsCurrent) {
+		if (nullptr != m_windowsCurrent) {
 			if(    true == needRedraw
 			    || true == _displayEveryTime) {
 				m_resourceManager.updateContext();
@@ -620,7 +620,7 @@ bool ewol::Context::OS_Draw(bool _displayEveryTime) {
 			m_FpsSystemContext.toc();
 			m_FpsSystem.tic();
 		}
-		if (NULL != m_windowsCurrent) {
+		if (nullptr != m_windowsCurrent) {
 			if(    true == needRedraw
 			    || true == _displayEveryTime) {
 				m_FpsSystem.incrementCounter();
@@ -680,7 +680,7 @@ ewol::object::Shared<ewol::widget::Windows> ewol::Context::getWindows() {
 };
 
 void ewol::Context::forceRedrawAll() {
-	if (m_windowsCurrent == NULL) {
+	if (m_windowsCurrent == nullptr) {
 		return;
 	}
 	m_windowsCurrent->calculateSize(vec2(m_windowsSize.x(), m_windowsSize.y()));
@@ -690,7 +690,7 @@ void ewol::Context::OS_Stop() {
 	// set the curent interface :
 	lockContext();
 	EWOL_INFO("OS_Stop...");
-	if (m_windowsCurrent != NULL) {
+	if (m_windowsCurrent != nullptr) {
 		m_windowsCurrent->sysOnKill();
 	}
 	// release the curent interface :
@@ -702,7 +702,7 @@ void ewol::Context::OS_Suspend() {
 	lockContext();
 	EWOL_INFO("OS_Suspend...");
 	m_previousDisplayTime = -1;
-	if (m_windowsCurrent != NULL) {
+	if (m_windowsCurrent != nullptr) {
 		m_windowsCurrent->onStateSuspend();
 	}
 	// release the curent interface :
@@ -715,7 +715,7 @@ void ewol::Context::OS_Resume() {
 	EWOL_INFO("OS_Resume...");
 	m_previousDisplayTime = ewol::getTime();
 	m_widgetManager.periodicCallResume(m_previousDisplayTime);
-	if (m_windowsCurrent != NULL) {
+	if (m_windowsCurrent != nullptr) {
 		m_windowsCurrent->onStateResume();
 	}
 	// release the curent interface :
@@ -725,7 +725,7 @@ void ewol::Context::OS_Foreground() {
 	// set the curent interface :
 	lockContext();
 	EWOL_INFO("OS_Foreground...");
-	if (m_windowsCurrent != NULL) {
+	if (m_windowsCurrent != nullptr) {
 		m_windowsCurrent->onStateForeground();
 	}
 	// release the curent interface :
@@ -736,7 +736,7 @@ void ewol::Context::OS_Background() {
 	// set the curent interface :
 	lockContext();
 	EWOL_INFO("OS_Background...");
-	if (m_windowsCurrent != NULL) {
+	if (m_windowsCurrent != nullptr) {
 		m_windowsCurrent->onStateBackground();
 	}
 	// release the curent interface :
@@ -779,7 +779,7 @@ void ewol::Context::keyboardHide() {
 
 
 bool ewol::Context::systemKeyboradEvent(enum ewol::key::keyboardSystem _key, bool _down) {
-	if (m_windowsCurrent == NULL) {
+	if (m_windowsCurrent == nullptr) {
 		return false;
 	}
 	lockContext();
diff --git a/sources/ewol/context/Context.h b/sources/ewol/context/Context.h
index 7c13efb1..14693ead 100644
--- a/sources/ewol/context/Context.h
+++ b/sources/ewol/context/Context.h
@@ -69,7 +69,7 @@ namespace ewol {
 				return m_resourceManager;
 			};
 		public:
-			Context(int32_t _argc=0, const char* _argv[]=NULL);
+			Context(int32_t _argc=0, const char* _argv[]=nullptr);
 			virtual ~Context();
 		protected:
 			/**
@@ -78,7 +78,7 @@ namespace ewol {
 			 */
 			void lockContext();
 			/**
-			 * @brief set the curent interface at NULL.
+			 * @brief set the curent interface at nullptr.
 			 * @note this un-lock the main mutex
 			 */
 			void unLockContext();
diff --git a/sources/ewol/context/IOs/Context.cpp b/sources/ewol/context/IOs/Context.cpp
index 1a01affe..5e4ee0eb 100644
--- a/sources/ewol/context/IOs/Context.cpp
+++ b/sources/ewol/context/IOs/Context.cpp
@@ -128,19 +128,19 @@ public:
 };
 
 
-MacOSInterface* interface = NULL;
+MacOSInterface* interface = nullptr;
 
 
 
 bool IOs::draw(bool _displayEveryTime) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return false;
 	}
 	return interface->MAC_Draw(_displayEveryTime);
 }
 
 void IOs::resize(float _x, float _y) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->MAC_Resize(_x, _y);
@@ -148,82 +148,82 @@ void IOs::resize(float _x, float _y) {
 
 
 void IOs::setMouseState(int32_t _id, bool _isDown, float _x, float _y) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->MAC_SetMouseState(_id, _isDown, _x, _y);
 }
 
 void IOs::setMouseMotion(int32_t _id, float _x, float _y) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->MAC_SetMouseMotion(_id, _x, _y);
 }
 
 void IOs::setInputState(int32_t _id, bool _isDown, float _x, float _y) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->MAC_SetInputState(_id, _isDown, _x, _y);
 }
 
 void IOs::setInputMotion(int32_t _id, float _x, float _y) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->MAC_SetInputMotion(_id, _x, _y);
 }
 
 void IOs::setKeyboard(ewol::key::Special _keyboardMode, int32_t _unichar, bool _isDown, bool _isAReapeateKey) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->MAC_SetKeyboard(_keyboardMode, _unichar, _isDown, _isAReapeateKey);
 }
 
 void IOs::setKeyboardMove(ewol::key::Special& _keyboardMode, enum ewol::key::keyboard _move, bool _isDown) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->MAC_SetKeyboardMove(_keyboardMode, _move, _isDown);
 }
 
 void IOs::start() {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	//interface->OS_Start();
 }
 
 void IOs::resume() {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->OS_Resume();
 }
 
 void IOs::suspend() {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->OS_Suspend();
 }
 
 void IOs::stop() {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->OS_Stop();
 }
 void IOs::background() {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->OS_Background();
 }
 void IOs::foreground() {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->OS_Foreground();
@@ -231,7 +231,7 @@ void IOs::foreground() {
 
 
 static int l_argc = 0;
-static const char **l_argv = NULL;
+static const char **l_argv = nullptr;
 /**
  * @brief Main of the program
  * @param std IO
@@ -248,19 +248,19 @@ void IOs::createInterface() {
 	etk::setArgZero(l_argv[0]);
 	EWOL_INFO("Create new interface");
 	interface = new MacOSInterface(l_argc, l_argv);
-	if (NULL == interface) {
+	if (nullptr == interface) {
 		EWOL_CRITICAL("Can not create the X11 interface ... MEMORY allocation error");
 		return;
 	}
 }
 
 void IOs::releaseInterface() {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	EWOL_INFO("Remove interface");
 	delete(interface);
-	interface = NULL;
+	interface = nullptr;
 }
 
 
diff --git a/sources/ewol/context/InputManager.cpp b/sources/ewol/context/InputManager.cpp
index abc98083..d7748184 100644
--- a/sources/ewol/context/InputManager.cpp
+++ b/sources/ewol/context/InputManager.cpp
@@ -46,7 +46,7 @@ bool ewol::context::InputManager::localEventInput(enum ewol::key::type _type,
                                                   int32_t _IdInput,
                                                   enum ewol::key::status _status,
                                                   vec2 _pos) {
-	if (NULL != _destWidget) {
+	if (nullptr != _destWidget) {
 		if (_type == ewol::key::typeMouse || _type == ewol::key::typeFinger) {
 			// create the system Event :
 			ewol::event::InputSystem tmpEventSystem(_type, _status, _IdInput, _pos, _destWidget, 0, m_specialKey); // TODO : set the real ID ...
@@ -62,7 +62,7 @@ bool ewol::context::InputManager::localEventInput(enum ewol::key::type _type,
 void ewol::context::InputManager::abortElement(InputPoperty *_eventTable,
                                                int32_t _idInput,
                                                enum ewol::key::type _type) {
-	if (NULL == _eventTable) {
+	if (nullptr == _eventTable) {
 		return;
 	}
 	if (_eventTable[_idInput].isUsed == true) {
@@ -76,14 +76,14 @@ void ewol::context::InputManager::abortElement(InputPoperty *_eventTable,
 
 void ewol::context::InputManager::cleanElement(InputPoperty *_eventTable,
                                                int32_t _idInput) {
-	if (NULL == _eventTable) {
+	if (nullptr == _eventTable) {
 		return;
 	}
 	//EWOL_INFO("CleanElement[" << idInput << "] = @" << (int64_t)eventTable);
 	_eventTable[_idInput].isUsed = false;
 	_eventTable[_idInput].destinationInputId = 0;
 	_eventTable[_idInput].lastTimeEvent = 0;
-	_eventTable[_idInput].curentWidgetEvent = NULL;
+	_eventTable[_idInput].curentWidgetEvent = nullptr;
 	_eventTable[_idInput].origin.setValue(0,0);
 	_eventTable[_idInput].size.setValue(99999999,99999999);
 	_eventTable[_idInput].downStart.setValue(0,0);
@@ -124,7 +124,7 @@ void ewol::context::InputManager::transfertEvent(ewol::object::Shared<ewol::Widg
 }
 
 void ewol::context::InputManager::grabPointer(ewol::object::Shared<ewol::Widget> _widget) {
-	if(NULL == _widget) {
+	if(nullptr == _widget) {
 		return;
 	}
 	m_grabWidget = _widget;
@@ -134,7 +134,7 @@ void ewol::context::InputManager::grabPointer(ewol::object::Shared<ewol::Widget>
 }
 
 void ewol::context::InputManager::unGrabPointer() {
-	m_grabWidget = NULL;
+	m_grabWidget = nullptr;
 	m_context.grabPointerEvents(false, vec2(0,0));
 }
 
@@ -162,7 +162,7 @@ void ewol::context::InputManager::newLayerSet() {
 }
 
 ewol::context::InputManager::InputManager(ewol::Context& _context) :
-  m_grabWidget(NULL),
+  m_grabWidget(nullptr),
   m_context(_context) {
 	setDpi(200);
 	EWOL_INFO("Init (start)");
@@ -207,7 +207,7 @@ void ewol::context::InputManager::motion(enum ewol::key::type _type,
 		// reject pointer  == > out of IDs...
 		return;
 	}
-	InputPoperty *eventTable = NULL;
+	InputPoperty *eventTable = nullptr;
 	if (_type == ewol::key::typeMouse) {
 		eventTable = m_eventMouseSaved;
 	} else if (_type == ewol::key::typeFinger) {
@@ -226,12 +226,12 @@ void ewol::context::InputManager::motion(enum ewol::key::type _type,
 	if (_type == ewol::key::typeMouse && _pointerID == 0) {
 		// this event is all time on the good widget ... and manage the enter and leave ...
 		// NOTE : the "layer widget" force us to get the widget at the specific position all the time :
-		ewol::object::Shared<ewol::Widget> tmpWidget = NULL;
-		if (m_grabWidget != NULL) {
+		ewol::object::Shared<ewol::Widget> tmpWidget = nullptr;
+		if (m_grabWidget != nullptr) {
 			// grab all events ...
 			tmpWidget = m_grabWidget;
 		} else {
-			if (NULL != tmpWindows) {
+			if (nullptr != tmpWindows) {
 				tmpWidget = tmpWindows->getWidgetAtPos(_pos);
 			}
 		}
@@ -255,10 +255,10 @@ void ewol::context::InputManager::motion(enum ewol::key::type _type,
 			eventTable[_pointerID].isInside = true;
 			// get destination widget :
 			eventTable[_pointerID].curentWidgetEvent = tmpWidget;
-			if (NULL == eventTable[_pointerID].curentWidgetEvent) {
+			if (nullptr == eventTable[_pointerID].curentWidgetEvent) {
 				eventTable[_pointerID].isInside = false;
 			}
-			if (NULL != eventTable[_pointerID].curentWidgetEvent) {
+			if (nullptr != eventTable[_pointerID].curentWidgetEvent) {
 				eventTable[_pointerID].origin = eventTable[_pointerID].curentWidgetEvent->getOrigin();
 				eventTable[_pointerID].size = eventTable[_pointerID].curentWidgetEvent->getSize();
 			}
@@ -339,7 +339,7 @@ void ewol::context::InputManager::state(enum ewol::key::type _type,
 	}
 	EVENT_DEBUG("event pointerId=" << _pointerID);
 	// convert position in open-GL coordonates ...
-	InputPoperty *eventTable = NULL;
+	InputPoperty *eventTable = nullptr;
 	InputLimit   localLimit;
 	if (_type == ewol::key::typeMouse) {
 		eventTable = m_eventMouseSaved;
@@ -396,16 +396,16 @@ void ewol::context::InputManager::state(enum ewol::key::type _type,
 			// set the element inside ...
 			eventTable[_pointerID].isInside = true;
 			// get destination widget :
-			if(NULL != tmpWindows) {
-				if (m_grabWidget != NULL && _type == ewol::key::typeMouse) {
+			if(nullptr != tmpWindows) {
+				if (m_grabWidget != nullptr && _type == ewol::key::typeMouse) {
 					eventTable[_pointerID].curentWidgetEvent = m_grabWidget;
 				} else {
 					eventTable[_pointerID].curentWidgetEvent = tmpWindows->getWidgetAtPos(_pos);
 				}
 			} else {
-				eventTable[_pointerID].curentWidgetEvent = NULL;
+				eventTable[_pointerID].curentWidgetEvent = nullptr;
 			}
-			if (NULL != eventTable[_pointerID].curentWidgetEvent) {
+			if (nullptr != eventTable[_pointerID].curentWidgetEvent) {
 				eventTable[_pointerID].origin = eventTable[_pointerID].curentWidgetEvent->getOrigin();
 				eventTable[_pointerID].size = eventTable[_pointerID].curentWidgetEvent->getSize();
 				eventTable[_pointerID].destinationInputId = localGetDestinationId(_type, eventTable[_pointerID].curentWidgetEvent, _pointerID);
@@ -433,7 +433,7 @@ void ewol::context::InputManager::state(enum ewol::key::type _type,
 			// Mark it un-used :
 			eventTable[_pointerID].isUsed = false;
 			// revove the widget ...
-			eventTable[_pointerID].curentWidgetEvent = NULL;
+			eventTable[_pointerID].curentWidgetEvent = nullptr;
 		} else {
 			// generate UP Event
 			EVENT_DEBUG("GUI : Input ID=" << _pointerID
@@ -454,14 +454,14 @@ void ewol::context::InputManager::state(enum ewol::key::type _type,
 				// save start time
 				eventTable[_pointerID].lastTimeEvent = currentTime;
 				int32_t nbClickMax = 0;
-				if(eventTable[_pointerID].curentWidgetEvent != NULL) {
+				if(eventTable[_pointerID].curentWidgetEvent != nullptr) {
 					nbClickMax = eventTable[_pointerID].curentWidgetEvent->getMouseLimit();
 					if (nbClickMax>5) {
 						nbClickMax = 5;
 					}
 				}
 				// in grab mode the single to quinte event are not generated ....
-				if(    (    m_grabWidget == NULL
+				if(    (    m_grabWidget == nullptr
 				         || _type != ewol::key::typeMouse )
 				    && eventTable[_pointerID].nbClickEvent < nbClickMax) {
 					// generate event SINGLE :
diff --git a/sources/ewol/context/MacOs/Context.cpp b/sources/ewol/context/MacOs/Context.cpp
index 868401b8..01ec1aac 100644
--- a/sources/ewol/context/MacOs/Context.cpp
+++ b/sources/ewol/context/MacOs/Context.cpp
@@ -119,19 +119,19 @@ class MacOSInterface : public ewol::Context {
 };
 
 
-MacOSInterface* interface = NULL;
+MacOSInterface* interface = nullptr;
 
 
 
 bool MacOs::draw(bool _displayEveryTime) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return false;
 	}
 	return interface->MAC_Draw(_displayEveryTime);
 }
 
 void MacOs::resize(float _x, float _y) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->MAC_Resize(_x, _y);
@@ -139,28 +139,28 @@ void MacOs::resize(float _x, float _y) {
 
 
 void MacOs::setMouseState(int32_t _id, bool _isDown, float _x, float _y) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->MAC_SetMouseState(_id, _isDown, _x, _y);
 }
 
 void MacOs::setMouseMotion(int32_t _id, float _x, float _y) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->MAC_SetMouseMotion(_id, _x, _y);
 }
 
 void MacOs::setKeyboard(ewol::key::Special _keyboardMode, int32_t _unichar, bool _isDown, bool _isAReapeateKey) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->MAC_SetKeyboard(_keyboardMode, _unichar, _isDown, _isAReapeateKey);
 }
 
 void MacOs::setKeyboardMove(ewol::key::Special& _keyboardMode, enum ewol::key::keyboard _move, bool _isDown) {
-	if (interface == NULL) {
+	if (interface == nullptr) {
 		return;
 	}
 	interface->MAC_SetKeyboardMove(_keyboardMode, _move, _isDown);
@@ -175,14 +175,14 @@ void MacOs::setKeyboardMove(ewol::key::Special& _keyboardMode, enum ewol::key::k
 int ewol::run(int _argc, const char *_argv[]) {
 	etk::setArgZero(_argv[0]);
 	interface = new MacOSInterface(_argc, _argv);
-	if (NULL == interface) {
+	if (nullptr == interface) {
 		EWOL_CRITICAL("Can not create the X11 interface ... MEMORY allocation error");
 		return -2;
 	}
 	
 	int32_t retValue = interface->Run();
 	delete(interface);
-	interface = NULL;
+	interface = nullptr;
 	return retValue;
 }
 
diff --git a/sources/ewol/context/Windows/Context.cpp b/sources/ewol/context/Windows/Context.cpp
index dfc1031e..5e2579d9 100644
--- a/sources/ewol/context/Windows/Context.cpp
+++ b/sources/ewol/context/Windows/Context.cpp
@@ -29,7 +29,7 @@
 
 int64_t ewol::getTime() {
     struct timeval now;
-    gettimeofday(&now, NULL);
+    gettimeofday(&now, nullptr);
     //EWOL_VERBOSE("current time : " << now.tv_sec << "s " << now.tv_usec << "us");
     return (int64_t)((int64_t)now.tv_sec*(int64_t)1000000 + (int64_t)now.tv_usec);
 }
@@ -72,10 +72,10 @@ class WindowsContext : public ewol::eContext {
 			wc.cbClsExtra = 0;
 			wc.cbWndExtra = 0;
 			wc.hInstance = hInstance;
-			wc.hIcon = loadIcon( NULL, IDI_APPLICATION );
-			wc.hCursor = loadCursor( NULL, IDC_ARROW );
+			wc.hIcon = loadIcon( nullptr, IDI_APPLICATION );
+			wc.hCursor = loadCursor( nullptr, IDC_ARROW );
 			wc.hbrBackground = (HBRUSH)GetStockObject( BLACK_BRUSH );
-			wc.lpszMenuName = NULL;
+			wc.lpszMenuName = nullptr;
 			wc.lpszClassName = "EwolMainWindows";
 			RegisterClass( &wc );
 			
@@ -83,7 +83,7 @@ class WindowsContext : public ewol::eContext {
 			hWnd = CreateWindow( "EwolMainWindows", "Ewol ... TODO Title", 
 			                     WS_CAPTION | WS_POPUPWINDOW | WS_VISIBLE | WS_SIZEBOX,
 			                     0, 0, 800, 600,
-			                     NULL, NULL, hInstance, NULL );
+			                     nullptr, NULL, hInstance, NULL );
 			int border_thickness = getSystemMetrics(SM_CXSIZEFRAME);
 			int title_size = getSystemMetrics(SM_CYCAPTION);
 			m_currentHeight = 600-2*border_thickness -title_size;
@@ -95,7 +95,7 @@ class WindowsContext : public ewol::eContext {
 			// program main loop
 			while(true == m_run) {
 				// check for messages
-				if ( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE )) {
+				if ( PeekMessage( &msg, nullptr, 0, 0, PM_REMOVE )) {
 					// handle or dispatch messages
 					if ( msg.message == WM_QUIT ) {
 						m_run = false;
@@ -204,7 +204,7 @@ class WindowsContext : public ewol::eContext {
 		// disable openGL
 		
 		void disableOpenGL(HWND _hWnd, HDC _hDC, HGLRC _hRC) {
-			wglMakeCurrent( NULL, NULL );
+			wglMakeCurrent( nullptr, NULL );
 			wglDeleteContext( _hRC );
 			releaseDC( _hWnd, _hDC );
 		}
@@ -256,7 +256,7 @@ class WindowsContext : public ewol::eContext {
 				*/
 				case WM_WINDOWPOSCHANGING: {
 					WINDOWPOS* tmpVal = (WINDOWPOS*)_lParam;
-					if (NULL != tmpVal) {
+					if (nullptr != tmpVal) {
 						//EWOL_DEBUG("WM_WINDOWPOSCHANGING : : (" << tmpVal->x << "," << tmpVal->y << ") ( " << tmpVal->cx << "," << tmpVal->cy << ")");
 						// in windows system, we need to remove the size of the border elements : 
 						int border_thickness = getSystemMetrics(SM_CXSIZEFRAME);
@@ -465,14 +465,14 @@ int ewol::Run(int _argc, const char *_argv[]) {
 		//return 1;
 	}
 	WindowsContext* interface = new WindowsContext(_argc, _argv);
-	if (NULL == interface) {
+	if (nullptr == interface) {
 		EWOL_CRITICAL("Can not create the X11 interface ... MEMORY allocation error");
 		return -2;
 	}
 	
 	int32_t retValue = interface->Run();
 	delete(interface);
-	interface = NULL;
+	interface = nullptr;
 	return retValue;
 }
 
diff --git a/sources/ewol/context/X11/Context.cpp b/sources/ewol/context/X11/Context.cpp
index 3a09d844..8b50d314 100644
--- a/sources/ewol/context/X11/Context.cpp
+++ b/sources/ewol/context/X11/Context.cpp
@@ -58,7 +58,7 @@ int64_t ewol::getTime() {
 	int ret = clock_gettime(CLOCK_REALTIME, &now);
 	if (ret != 0) {
 		// Error to get the time ...
-		now.tv_sec = time(NULL);
+		now.tv_sec = time(nullptr);
 		now.tv_nsec = 0;
 	}
 	//EWOL_VERBOSE("current time : " << now.tv_sec << "s " << now.tv_usec << "us");
@@ -144,14 +144,14 @@ class X11Interface : public ewol::Context {
 	public:
 		X11Interface(int32_t _argc, const char* _argv[]) :
 		  ewol::Context(_argc, _argv),
-		  m_display(NULL),
+		  m_display(nullptr),
 		  m_originX(0),
 		  m_originY(0),
 		  m_cursorEventX(0),
 		  m_cursorEventY(0),
 		  m_currentHeight(0),
 		  m_currentWidth(0),
-		  m_visual(NULL),
+		  m_visual(nullptr),
 		  m_doubleBuffered(0),
 		  m_run(false),
 		  m_grabAllEvent(false),
@@ -225,21 +225,21 @@ class X11Interface : public ewol::Context {
 							{
 								XSelectionRequestEvent *req=&(event.xselectionrequest);
 								if (req->property == 0) {
-									EWOL_ERROR("Get NULL ATOM ... property");
+									EWOL_ERROR("Get nullptr ATOM ... property");
 									break;
 								}
 								if (req->target == 0) {
-									EWOL_ERROR("Get NULL ATOM ... target");
+									EWOL_ERROR("Get nullptr ATOM ... target");
 									break;
 								}
 								char * atomNameProperty = XGetAtomName(m_display, req->property);
 								char * atomNameTarget = XGetAtomName(m_display, req->target);
 								EWOL_INFO("X11    property: \"" << atomNameProperty << "\"");
 								EWOL_INFO("X11    target:   \"" << atomNameTarget << "\"");
-								if (atomNameProperty != NULL) {
+								if (atomNameProperty != nullptr) {
 									XFree(atomNameProperty);
 								}
-								if (atomNameTarget != NULL) {
+								if (atomNameTarget != nullptr) {
 									XFree(atomNameTarget);
 								}
 							}
@@ -294,24 +294,24 @@ class X11Interface : public ewol::Context {
 							#ifdef DEBUG_X11_EVENT
 							{
 								if (req->property == 0) {
-									EWOL_ERROR("Get NULL ATOM ... property");
+									EWOL_ERROR("Get nullptr ATOM ... property");
 									break;
 								}
 								if (req->selection == 0) {
-									EWOL_ERROR("Get NULL ATOM ... selection");
+									EWOL_ERROR("Get nullptr ATOM ... selection");
 									break;
 								}
 								if (req->target == 0) {
-									EWOL_ERROR("Get NULL ATOM ... target");
+									EWOL_ERROR("Get nullptr ATOM ... target");
 									break;
 								}
 								char * atomNameProperty = XGetAtomName(m_display, req->property);
 								char * atomNameSelection = XGetAtomName(m_display, req->selection);
 								char * atomNameTarget = XGetAtomName(m_display, req->target);
 								EWOL_INFO("    from: " << atomNameProperty << "  request=" << atomNameSelection << " in " << atomNameTarget);
-								if (NULL != atomNameProperty) { XFree(atomNameProperty); }
-								if (NULL != atomNameSelection) { XFree(atomNameSelection); }
-								if (NULL != atomNameTarget) { XFree(atomNameTarget); }
+								if (nullptr != atomNameProperty) { XFree(atomNameProperty); }
+								if (nullptr != atomNameSelection) { XFree(atomNameSelection); }
+								if (nullptr != atomNameTarget) { XFree(atomNameTarget); }
 							}
 							#endif
 							
@@ -920,8 +920,8 @@ class X11Interface : public ewol::Context {
 			static char *title = (char*)"Ewol";
 			
 			// Connect to the X server
-			m_display = XOpenDisplay(NULL);
-			if(NULL == m_display) {
+			m_display = XOpenDisplay(nullptr);
+			if(nullptr == m_display) {
 				EWOL_CRITICAL("Could not open display X.");
 				exit(-1);
 			} else {
@@ -934,7 +934,7 @@ class X11Interface : public ewol::Context {
 			                               ewol::Dimension::Millimeter);
 			// get an appropriate visual
 			m_visual = glXChooseVisual(m_display, Xscreen, attrListDbl);
-			if (NULL == m_visual) {
+			if (nullptr == m_visual) {
 				m_visual = glXChooseVisual(m_display, Xscreen, attrListSgl);
 				m_doubleBuffered = false;
 				EWOL_INFO("GL-X singlebuffered rendering will be used, no doublebuffering available");
@@ -1012,10 +1012,10 @@ class X11Interface : public ewol::Context {
 			StartupState->flags = StateHint;
 			
 			XSetWMProperties(m_display, m_WindowHandle,&textprop, &textprop,/* Window title/icon title*/
-				NULL, 0,/* Argv[], argc for program*/
+				nullptr, 0,/* Argv[], argc for program*/
 				&hints, /* Start position/size*/
 				StartupState,/* Iconised/not flag   */
-				NULL);
+				nullptr);
 			
 			XFree(StartupState);
 			
@@ -1024,15 +1024,15 @@ class X11Interface : public ewol::Context {
 			//XIfEvent(m_display, &event, WaitForMapNotify, (char*)&m_WindowHandle);
 			
 			
-			m_xim = XOpenIM(m_display, NULL, NULL, NULL);
-			if (m_xim == NULL) {
+			m_xim = XOpenIM(m_display, nullptr, NULL, NULL);
+			if (m_xim == nullptr) {
 				EWOL_ERROR("Could not open input method");
 				return false;
 			}
 			/*
-			XIMStyles *styles=NULL;
-			char* failed_arg = XGetIMValues(m_xim, XNQueryInputStyle, &styles, NULL);
-			if (failed_arg != NULL) {
+			XIMStyles *styles=nullptr;
+			char* failed_arg = XGetIMValues(m_xim, XNQueryInputStyle, &styles, nullptr);
+			if (failed_arg != nullptr) {
 				EWOL_ERROR("XIM Can't get styles");
 				return false;
 			}
@@ -1040,8 +1040,8 @@ class X11Interface : public ewol::Context {
 				EWOL_INFO("style " << styles->supported_styles[iii]);
 			}
 			*/
-			m_xic = XCreateIC(m_xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing, XNClientWindow, m_WindowHandle, NULL);
-			if (m_xic == NULL) {
+			m_xic = XCreateIC(m_xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing, XNClientWindow, m_WindowHandle, nullptr);
+			if (m_xic == nullptr) {
 				EWOL_ERROR("Could not open IC");
 				return false;
 			}
@@ -1083,7 +1083,7 @@ class X11Interface : public ewol::Context {
 					return;
 			}
 			char* tmpVal = new char[4*dataImage.getWidth()*dataImage.getHeight()];
-			if (NULL == tmpVal) {
+			if (nullptr == tmpVal) {
 				EWOL_CRITICAL("Allocation error ...");
 				return;
 			}
@@ -1191,7 +1191,7 @@ class X11Interface : public ewol::Context {
 			// Note when we free the pixmap ... the icon is removed ...  == > this is a real memory leek ...
 			//XFreePixmap(m_display, tmpPixmap);
 			
-			myImage->data = NULL;
+			myImage->data = nullptr;
 			XDestroyImage(myImage);
 			delete[] tmpVal;
 			
@@ -1346,12 +1346,12 @@ class X11Interface : public ewol::Context {
 int ewol::run(int _argc, const char *_argv[]) {
 	etk::setArgZero(_argv[0]);
 	X11Interface* interface = new X11Interface(_argc, _argv);
-	if (NULL == interface) {
+	if (nullptr == interface) {
 		EWOL_CRITICAL("Can not create the X11 interface ... MEMORY allocation error");
 		return -2;
 	}
 	int32_t retValue = interface->run();
 	delete(interface);
-	interface = NULL;
+	interface = nullptr;
 	return retValue;
 }
diff --git a/sources/ewol/context/directFB/Context.cpp b/sources/ewol/context/directFB/Context.cpp
index 04caf7e4..70686c15 100644
--- a/sources/ewol/context/directFB/Context.cpp
+++ b/sources/ewol/context/directFB/Context.cpp
@@ -52,7 +52,7 @@ int64_t guiInterface::getTime() {
 	int ret = clock_gettime(CLOCK_REALTIME, &now);
 	if (ret != 0) {
 		// Error to get the time ...
-		now.tv_sec = time(NULL);
+		now.tv_sec = time(nullptr);
 		now.tv_nsec = 0;
 	}
 	//EWOL_VERBOSE("current time : " << now.tv_sec << "s " << now.tv_usec << "us");
@@ -71,16 +71,16 @@ bool m_grabAllEvent = false;
 
 
 // the super interface
-IDirectFB *dfb = NULL;
+IDirectFB *dfb = nullptr;
 
 // the primary surface (surface of primary layer)
-IDirectFBSurface *primary = NULL;
+IDirectFBSurface *primary = nullptr;
 
 // the GL context
-IDirectFBGL *primary_gl = NULL;
+IDirectFBGL *primary_gl = nullptr;
 
 // event buffer
-IDirectFBEventBuffer *events = NULL;
+IDirectFBEventBuffer *events = nullptr;
 
 static int screen_width =800;
 static int screen_height = 600;
@@ -152,7 +152,7 @@ void DirectFB_Init(int argc, const char *argv[]) {
 	primary->setDstBlendFunction(primary, DSBF_SRCALPHA);
 	primary->setDrawingFlags(primary, DSDRAW_BLEND);
 	
-	primary->Blit(primary, primary, NULL, 0, 0);
+	primary->Blit(primary, primary, nullptr, 0, 0);
 	
 	
 	EWOL_INFO("call getSize");
@@ -175,7 +175,7 @@ void DirectFB_Init(int argc, const char *argv[]) {
 	}
 	
 	EWOL_INFO("call Flip");
-	primary->Flip(primary, NULL, (DFBSurfaceFlipFlags)0);//DSFLIP_ONSYNC);
+	primary->Flip(primary, nullptr, (DFBSurfaceFlipFlags)0);//DSFLIP_ONSYNC);
 
 	// NOTE : we need to force it on X11 display ...
 	EWOL_INFO("call getGL");
@@ -212,7 +212,7 @@ void DirectFB_Run() {
 	primary->FillRectangle(primary, 0, 0, screen_width, screen_height);
 	primary->setColor (primary, 0xFF, (uint8_t)position, 0x00, 0xFF);
 	primary->FillRectangle(primary, position, position, 300, 300);
-	primary->Flip(primary, NULL, (DFBSurfaceFlipFlags)0);//DSFLIP_ONSYNC);
+	primary->Flip(primary, nullptr, (DFBSurfaceFlipFlags)0);//DSFLIP_ONSYNC);
 		position++;
 		if (position>600) {
 			position = 0;
@@ -234,7 +234,7 @@ void DirectFB_Run() {
 				EWOL_ERROR("primary_gl->Unlock");
 				DirectFBErrorFatal("primary_gl->Unlock", err);
 			}
-			primary->Flip(primary, NULL, (DFBSurfaceFlipFlags)0);//DSFLIP_ONSYNC);
+			primary->Flip(primary, nullptr, (DFBSurfaceFlipFlags)0);//DSFLIP_ONSYNC);
 		}
 		
 		while (events->getEvent(events, DFB_EVENT(&evt)) == DFB_OK) {
diff --git a/sources/ewol/object/ConfigElement.cpp b/sources/ewol/object/ConfigElement.cpp
index 783cbebc..81f88f95 100644
--- a/sources/ewol/object/ConfigElement.cpp
+++ b/sources/ewol/object/ConfigElement.cpp
@@ -13,19 +13,19 @@
 
 std::ostream& ewol::operator <<(std::ostream& _os, const ewol::object::ConfigElement& _obj) {
 	_os << "{";
-	if (NULL != _obj.getConfig()) {
+	if (nullptr != _obj.getConfig()) {
 		_os << "config=\"" << _obj.getConfig() << "\"";
 	}
-	if (NULL != _obj.getType()) {
+	if (nullptr != _obj.getType()) {
 		_os << " type=\"" << _obj.getType() << "\"";
 	}
-	if (NULL != _obj.getControl()) {
+	if (nullptr != _obj.getControl()) {
 		_os << " ctrl=\"" << _obj.getControl() << "\"";
 	}
-	if (NULL != _obj.getDescription()) {
+	if (nullptr != _obj.getDescription()) {
 		_os << " desc=\"" << _obj.getDescription() << "\"";
 	}
-	if (NULL != _obj.getDefault()) {
+	if (nullptr != _obj.getDefault()) {
 		_os << " default=\"" << _obj.getDefault() << "\"";
 	}
 	_os << "}";
diff --git a/sources/ewol/object/ConfigElement.h b/sources/ewol/object/ConfigElement.h
index 2bac67de..9e6ab808 100644
--- a/sources/ewol/object/ConfigElement.h
+++ b/sources/ewol/object/ConfigElement.h
@@ -22,11 +22,11 @@ namespace ewol {
 				const char* m_default; //!< default value ...
 			public:
 				// note : no parameter capability is needed to create element in case of vector stoarage.
-				ConfigElement(const char* _config = NULL,
-				              const char* _type = NULL,
-				              const char* _control = NULL,
-				              const char* _description = NULL,
-				              const char* _default = NULL) :
+				ConfigElement(const char* _config = nullptr,
+				              const char* _type = nullptr,
+				              const char* _control = nullptr,
+				              const char* _description = nullptr,
+				              const char* _default = nullptr) :
 				  m_config(_config),
 				  m_type(_type),
 				  m_control(_control),
diff --git a/sources/ewol/object/Manager.cpp b/sources/ewol/object/Manager.cpp
index b9efba4a..25ac9599 100644
--- a/sources/ewol/object/Manager.cpp
+++ b/sources/ewol/object/Manager.cpp
@@ -42,14 +42,14 @@ void ewol::object::Manager::unInit() {
 	EWOL_INFO(" remove missing user widget");
 	size_t iii=0;
 	while(iii < m_eObjectList.size()) {
-		if (m_eObjectList[iii] != NULL) {
+		if (m_eObjectList[iii] != nullptr) {
 			if (    m_eObjectList[iii]->getStatic() == true
 			     || m_eObjectList[iii]->getStatusResource() == true) {
 				iii++;
 			} else {
 				EWOL_WARNING("Un-INIT : remove Object type=\"" << m_eObjectList[iii]->getObjectType() << "\"");
 				m_eObjectList[iii].reset();
-				m_eObjectList[iii] = NULL;
+				m_eObjectList[iii] = nullptr;
 			}
 		} else {
 			m_eObjectList.erase(m_eObjectList.begin()+iii);
@@ -58,7 +58,7 @@ void ewol::object::Manager::unInit() {
 	removeAllAutoRemove();
 	EWOL_INFO(" remove resources user widgets");
 	while(iii < m_eObjectList.size()) {
-		if (m_eObjectList[iii] != NULL) {
+		if (m_eObjectList[iii] != nullptr) {
 			if (m_eObjectList[iii]->getStatic() == true) {
 				iii++;
 			} else {
@@ -72,7 +72,7 @@ void ewol::object::Manager::unInit() {
 	removeAllAutoRemove();
 	EWOL_INFO(" remove static user widgets");
 	while(iii < m_eObjectList.size()) {
-		if (m_eObjectList[iii] != NULL) {
+		if (m_eObjectList[iii] != nullptr) {
 			EWOL_WARNING("Un-INIT : remove Object type=\"" << m_eObjectList[iii]->getObjectType() << "\"");
 			m_eObjectList[iii].reset();
 		} else {
@@ -82,7 +82,7 @@ void ewol::object::Manager::unInit() {
 }
 
 void ewol::object::Manager::add(ewol::object::Shared<ewol::Object> _object) {
-	if (_object == NULL) {
+	if (_object == nullptr) {
 		EWOL_ERROR("try to add an inexistant Object in manager");
 	}
 	// ! < it might benerate a shared object !!!
@@ -96,7 +96,7 @@ int32_t ewol::object::Manager::getNumberObject() {
 void ewol::object::Manager::informOneObjectIsRemoved(ewol::object::Shared<ewol::Object> _object) {
 	size_t mbElement = m_eObjectList.size();
 	for (int64_t iii=0; iii<(int64_t)m_eObjectList.size(); ++iii) {
-		if (    m_eObjectList[iii] != NULL
+		if (    m_eObjectList[iii] != nullptr
 		     && m_eObjectList[iii] != _object) {
 			//EWOL_DEBUG("inform " << iii+1 << "/" << m_eObjectList.size());
 			//EWOL_DEBUG("    id=" << m_eObjectList[iii]->getId() << " named '" << m_eObjectList[iii]->getName() << "' type=" << m_eObjectList[iii]->getObjectType());
@@ -110,7 +110,7 @@ void ewol::object::Manager::informOneObjectIsRemoved(ewol::object::Shared<ewol::
 	//EWOL_DEBUG("inform active done");
 	mbElement = m_eObjectAutoRemoveList.size();
 	for (size_t iii=0; iii<m_eObjectAutoRemoveList.size(); iii++) {
-		if(    m_eObjectAutoRemoveList[iii] != NULL
+		if(    m_eObjectAutoRemoveList[iii] != nullptr
 		    && m_eObjectAutoRemoveList[iii] != _object) {
 			//EWOL_DEBUG("inform2 " << iii+1 << "/" << m_eObjectAutoRemoveList.size());
 			m_eObjectAutoRemoveList[iii]->onObjectRemove(_object);
@@ -126,14 +126,14 @@ void ewol::object::Manager::informOneObjectIsRemoved(ewol::object::Shared<ewol::
 }
 
 void ewol::object::Manager::rm(ewol::object::Shared<ewol::Object> _object) {
-	if (_object == NULL) {
-		EWOL_ERROR("Try to remove (NULL) Object");
+	if (_object == nullptr) {
+		EWOL_ERROR("Try to remove (nullptr) Object");
 		return;
 	}
 	for (size_t iii=0; iii<m_eObjectList.size(); iii++) {
 		if (m_eObjectList[iii] == _object) {
 			// remove Element
-			m_eObjectList[iii] = NULL;
+			m_eObjectList[iii] = nullptr;
 			m_eObjectList.erase(m_eObjectList.begin()+iii);
 			informOneObjectIsRemoved(_object);
 			return;
@@ -141,7 +141,7 @@ void ewol::object::Manager::rm(ewol::object::Shared<ewol::Object> _object) {
 	}
 	// check if the object has not been auto removed ... or remove in defered time ...
 	for (size_t iii=0; iii<m_eObjectAutoRemoveList.size(); iii++) {
-		if(    m_eObjectAutoRemoveList[iii] != NULL
+		if(    m_eObjectAutoRemoveList[iii] != nullptr
 		    && m_eObjectAutoRemoveList[iii] == _object) {
 			return;
 		}
@@ -151,14 +151,14 @@ void ewol::object::Manager::rm(ewol::object::Shared<ewol::Object> _object) {
 }
 
 void ewol::object::Manager::autoRemove(ewol::object::Shared<ewol::Object> _object) {
-	if (NULL == _object) {
-		EWOL_ERROR("Try to Auto-Remove (NULL) Object");
+	if (nullptr == _object) {
+		EWOL_ERROR("Try to Auto-Remove (nullptr) Object");
 		return;
 	}
 	for (size_t iii=0; iii<m_eObjectList.size(); iii++) {
 		if (m_eObjectList[iii] == _object) {
 			// remove Element
-			m_eObjectList[iii] = NULL;
+			m_eObjectList[iii] = nullptr;
 			m_eObjectList.erase(m_eObjectList.begin()+iii);
 			EWOL_DEBUG("Auto-Remove Object : [" << _object->getId() << "] type='" << _object->getObjectType() << "'");
 			if (_object->getStatusResource() == false) {
@@ -177,7 +177,7 @@ void ewol::object::Manager::autoRemove(ewol::object::Shared<ewol::Object> _objec
 void ewol::object::Manager::removeAllAutoRemove() {
 	//EWOL_DEBUG("Auto-Remove Object section : " << m_eObjectAutoRemoveList.size() << " elemeents");
 	while(0<m_eObjectAutoRemoveList.size()) {
-		if (m_eObjectAutoRemoveList[0] != NULL) {
+		if (m_eObjectAutoRemoveList[0] != nullptr) {
 			EWOL_DEBUG("Real Auto-Remove Object [" << m_eObjectAutoRemoveList[0]->getId() << "]type='" << m_eObjectAutoRemoveList[0]->getObjectType() << "'");
 		}
 		m_eObjectAutoRemoveList.erase(m_eObjectAutoRemoveList.begin());
@@ -187,15 +187,15 @@ void ewol::object::Manager::removeAllAutoRemove() {
 
 ewol::object::Shared<ewol::Object> ewol::object::Manager::get(const std::string& _name) {
 	if (_name == "") {
-		return NULL;
+		return nullptr;
 	}
 	for (size_t iii=0; iii<m_eObjectList.size(); iii++) {
-		if (m_eObjectList[iii] != NULL) {
+		if (m_eObjectList[iii] != nullptr) {
 			if (m_eObjectList[iii]->getName() == _name) {
 				return m_eObjectList[iii].get();
 			}
 		}
 	}
-	return NULL;
+	return nullptr;
 }
 
diff --git a/sources/ewol/object/Message.cpp b/sources/ewol/object/Message.cpp
index 8481598f..e6db8c6b 100644
--- a/sources/ewol/object/Message.cpp
+++ b/sources/ewol/object/Message.cpp
@@ -13,10 +13,10 @@
 
 std::ostream& ewol::object::operator <<(std::ostream& _os, const ewol::object::Message& _obj) {
 	_os << "{";
-	if (NULL != _obj.getMessage()) {
+	if (nullptr != _obj.getMessage()) {
 		_os << "msg=\"" << _obj.getMessage() << "\"";
 	} else {
-		_os << "msg={NULL}";
+		_os << "msg={nullptr}";
 	}
 	_os << " data=\"" << _obj.getData() << "\"}";
 	return _os;
diff --git a/sources/ewol/object/MultiCast.cpp b/sources/ewol/object/MultiCast.cpp
index 6d824205..c202006d 100644
--- a/sources/ewol/object/MultiCast.cpp
+++ b/sources/ewol/object/MultiCast.cpp
@@ -25,12 +25,12 @@ ewol::object::MultiCast::~MultiCast() {
 
 
 void ewol::object::MultiCast::add(ewol::object::Shared<ewol::Object> _object, const char* const _message) {
-	if (NULL == _object) {
-		EWOL_ERROR("Add with NULL object");
+	if (nullptr == _object) {
+		EWOL_ERROR("Add with nullptr object");
 		return;
 	}
-	if (NULL == _message) {
-		EWOL_ERROR("Add with NULL Message");
+	if (nullptr == _message) {
+		EWOL_ERROR("Add with nullptr Message");
 		return;
 	}
 	m_messageList.push_back(MessageList(_message, _object));
@@ -39,16 +39,16 @@ void ewol::object::MultiCast::add(ewol::object::Shared<ewol::Object> _object, co
 
 
 void ewol::object::MultiCast::rm(ewol::object::Shared<ewol::Object> _object) {
-	if (NULL == _object) {
-		EWOL_ERROR("Rm with NULL object");
+	if (nullptr == _object) {
+		EWOL_ERROR("Rm with nullptr object");
 		return;
 	}
 	// send the message at all registered widget ...
 	for (int32_t iii=m_messageList.size()-1; iii >= 0; iii--) {
 		if(m_messageList[iii].m_object == _object) {
 			EWOL_DEBUG("SendMulticast RM listener :" << _object->getId());
-			m_messageList[iii].m_message = NULL;
-			m_messageList[iii].m_object = NULL;
+			m_messageList[iii].m_message = nullptr;
+			m_messageList[iii].m_object = nullptr;
 			m_messageList.erase(m_messageList.begin()+iii);
 		}
 	}
@@ -62,7 +62,7 @@ void ewol::object::MultiCast::send(ewol::object::Shared<ewol::Object> _object, c
 		if(    m_messageList[iii].m_message == _message
 		    && m_messageList[iii].m_object != _object)
 		{
-			if (NULL != m_messageList[iii].m_object) {
+			if (nullptr != m_messageList[iii].m_object) {
 				EWOL_VERBOSE("        id = " << m_messageList[iii].m_object->getId() << " type=" << m_messageList[iii].m_object->getObjectType());
 				// generate event ... (create message before ...
 				ewol::object::Message tmpMsg(_object, m_messageList[iii].m_message, _data);
diff --git a/sources/ewol/object/MultiCast.h b/sources/ewol/object/MultiCast.h
index 485f8fa8..cfd2b92b 100644
--- a/sources/ewol/object/MultiCast.h
+++ b/sources/ewol/object/MultiCast.h
@@ -22,7 +22,7 @@ namespace ewol {
 			private:
 				class MessageList {
 					public:
-						MessageList(const char* _message=NULL, ewol::object::Shared<ewol::Object> _object=NULL) :
+						MessageList(const char* _message=nullptr, ewol::object::Shared<ewol::Object> _object=nullptr) :
 						  m_message(_message), m_object(_object) {
 							
 						}
@@ -34,7 +34,7 @@ namespace ewol {
 				MultiCast();
 				~MultiCast();
 				void anonymousSend(const char* const _messageId, const std::string& _data) {
-					send(NULL, _messageId, _data);
+					send(nullptr, _messageId, _data);
 				};
 				void send(ewol::object::Shared<ewol::Object> _object, const char* const _message, const std::string& _data);
 				void rm(ewol::object::Shared<ewol::Object> _object);
diff --git a/sources/ewol/object/Object.cpp b/sources/ewol/object/Object.cpp
index b75fb847..b48f2728 100644
--- a/sources/ewol/object/Object.cpp
+++ b/sources/ewol/object/Object.cpp
@@ -79,7 +79,7 @@ ewol::Object::Object() :
 	m_uniqueId = m_valUID++;
 	EWOL_DEBUG("new Object : [" << m_uniqueId << "]");
 	getObjectManager().add(this);
-	registerConfig(configName, "string", NULL, "Object name, might be a unique reference in all the program");
+	registerConfig(configName, "string", nullptr, "Object name, might be a unique reference in all the program");
 }
 ewol::Object::Object(const std::string& _name) :
   m_objRefCount(1),
@@ -90,7 +90,7 @@ ewol::Object::Object(const std::string& _name) :
 	m_uniqueId = m_valUID++;
 	EWOL_DEBUG("new Object : [" << m_uniqueId << "]");
 	getObjectManager().add(this);
-	registerConfig(configName, "string", NULL, "Object name, might be a unique reference in all the program");
+	registerConfig(configName, "string", nullptr, "Object name, might be a unique reference in all the program");
 }
 
 ewol::Object::~Object() {
@@ -98,9 +98,9 @@ ewol::Object::~Object() {
 	getObjectManager().rm(this);
 	getMultiCast().rm(this);
 	for (size_t iii=0; iii<m_externEvent.size(); iii++) {
-		if (NULL!=m_externEvent[iii]) {
+		if (nullptr!=m_externEvent[iii]) {
 			delete(m_externEvent[iii]);
-			m_externEvent[iii] = NULL;
+			m_externEvent[iii] = nullptr;
 		}
 	}
 	m_externEvent.clear();
@@ -116,7 +116,7 @@ const char * const ewol::Object::getObjectType() {
 }
 
 void ewol::Object::addObjectType(const char* _type) {
-	if (_type == NULL) {
+	if (_type == nullptr) {
 		EWOL_ERROR(" try to add a type with no value...");
 		return;
 	}
@@ -152,7 +152,7 @@ void ewol::Object::removeObject() {
 }
 
 void ewol::Object::addEventId(const char * _generateEventId) {
-	if (NULL != _generateEventId) {
+	if (nullptr != _generateEventId) {
 		m_availlableEventId.push_back(_generateEventId);
 	}
 }
@@ -162,7 +162,7 @@ void ewol::Object::generateEventId(const char * _generateEventId, const std::str
 	EWOL_VERBOSE("try send message '" << _generateEventId << "'");
 	// for every element registered ...
 	for (size_t iii=0; iii<m_externEvent.size(); iii++) {
-		if (NULL==m_externEvent[iii]) {
+		if (nullptr==m_externEvent[iii]) {
 			EWOL_VERBOSE("    Null pointer");
 			continue;
 		}
@@ -171,8 +171,8 @@ void ewol::Object::generateEventId(const char * _generateEventId, const std::str
 			EWOL_VERBOSE("    wrong event '" << m_externEvent[iii]->localEventId << "' != '" << _generateEventId << "'");
 			continue;
 		}
-		if (m_externEvent[iii]->destObject == NULL) {
-			EWOL_VERBOSE("    NULL dest");
+		if (m_externEvent[iii]->destObject == nullptr) {
+			EWOL_VERBOSE("    nullptr dest");
 			continue;
 		}
 		if (m_externEvent[iii]->overloadData.size() <= 0){
@@ -207,12 +207,12 @@ void ewol::Object::registerOnEvent(ewol::object::Shared<ewol::Object> _destinati
                                     const char * _eventId,
                                     const char * _eventIdgenerated,
                                     const std::string& _overloadData) {
-	if (NULL == _destinationObject) {
-		EWOL_ERROR("Input ERROR NULL pointer Object ...");
+	if (nullptr == _destinationObject) {
+		EWOL_ERROR("Input ERROR nullptr pointer Object ...");
 		return;
 	}
-	if (NULL == _eventId) {
-		EWOL_ERROR("Input ERROR NULL pointer Event Id...");
+	if (nullptr == _eventId) {
+		EWOL_ERROR("Input ERROR nullptr pointer Event Id...");
 		return;
 	}
 	if (    _eventId[0] == '*'
@@ -220,14 +220,14 @@ void ewol::Object::registerOnEvent(ewol::object::Shared<ewol::Object> _destinati
 		EWOL_VERBOSE("Register on all event ...");
 		for(size_t iii=0; iii<m_availlableEventId.size(); iii++) {
 			ewol::object::EventExtGen * tmpEvent = new ewol::object::EventExtGen();
-			if (NULL == tmpEvent) {
+			if (nullptr == tmpEvent) {
 				EWOL_ERROR("Allocation error in Register Event...");
 				continue;
 			}
 			tmpEvent->localEventId = m_availlableEventId[iii];
 			tmpEvent->destObject = _destinationObject;
 			tmpEvent->overloadData = _overloadData;
-			if (NULL != _eventIdgenerated) {
+			if (nullptr != _eventIdgenerated) {
 				tmpEvent->destEventId = _eventIdgenerated;
 			} else {
 				tmpEvent->destEventId = m_availlableEventId[iii];
@@ -260,14 +260,14 @@ void ewol::Object::registerOnEvent(ewol::object::Shared<ewol::Object> _destinati
 		return;
 	}
 	ewol::object::EventExtGen * tmpEvent = new ewol::object::EventExtGen();
-	if (NULL == tmpEvent) {
+	if (nullptr == tmpEvent) {
 		EWOL_ERROR("Allocation error in Register Event...");
 		return;
 	}
 	tmpEvent->localEventId = _eventId;
 	tmpEvent->destObject = _destinationObject;
 	tmpEvent->overloadData = _overloadData;
-	if (NULL != _eventIdgenerated) {
+	if (nullptr != _eventIdgenerated) {
 		tmpEvent->destEventId = _eventIdgenerated;
 	} else {
 		tmpEvent->destEventId = _eventId;
@@ -277,19 +277,19 @@ void ewol::Object::registerOnEvent(ewol::object::Shared<ewol::Object> _destinati
 
 void ewol::Object::unRegisterOnEvent(ewol::object::Shared<ewol::Object> _destinationObject,
                                       const char * _eventId) {
-	if (NULL == _destinationObject) {
-		EWOL_ERROR("Input ERROR NULL pointer Object ...");
+	if (nullptr == _destinationObject) {
+		EWOL_ERROR("Input ERROR nullptr pointer Object ...");
 		return;
 	}
 	// check if event existed :
 	for(int64_t iii = m_externEvent.size()-1; iii >= 0; --iii) {
-		if (m_externEvent[iii] == NULL) {
+		if (m_externEvent[iii] == nullptr) {
 			continue;
 		}
 		if (m_externEvent[iii]->destObject != _destinationObject) {
 			continue;
 		}
-		if (_eventId == NULL) {
+		if (_eventId == nullptr) {
 			m_externEvent.erase(m_externEvent.begin()+iii);
 		} else if (m_externEvent[iii]->localEventId == _eventId) {
 			m_externEvent.erase(m_externEvent.begin()+iii);
@@ -312,12 +312,12 @@ void ewol::Object::registerConfig(const char* _config,
                                   const char* _control,
                                   const char* _description,
                                   const char* _default) {
-	if (NULL == _config) {
-		EWOL_ERROR("Try to add NULL config");
+	if (nullptr == _config) {
+		EWOL_ERROR("Try to add nullptr config");
 		return;
 	}
 	for(size_t iii=0 ; iii<m_listConfig.size() ; iii++) {
-		if (NULL != m_listConfig[iii].getConfig()) {
+		if (nullptr != m_listConfig[iii].getConfig()) {
 			if (0 == strcmp(m_listConfig[iii].getConfig(), _config) ) {
 				EWOL_ERROR("Try to add config already added : " << _config << " at pos=" << iii);
 			}
@@ -328,12 +328,12 @@ void ewol::Object::registerConfig(const char* _config,
 
 
 bool ewol::Object::loadXML(exml::Element* _node) {
-	if (NULL == _node) {
+	if (nullptr == _node) {
 		return false;
 	}
 	bool errorOccured = true;
 	for(size_t iii=0 ; iii<m_listConfig.size() ; iii++) {
-		if (m_listConfig[iii].getConfig() == NULL) {
+		if (m_listConfig[iii].getConfig() == nullptr) {
 			continue;
 		}
 		if (_node->existAttribute(m_listConfig[iii].getConfig()) == false) {
@@ -348,16 +348,16 @@ bool ewol::Object::loadXML(exml::Element* _node) {
 }
 
 bool ewol::Object::storeXML(exml::Element* _node) const {
-	if (NULL == _node) {
+	if (nullptr == _node) {
 		return false;
 	}
 	bool errorOccured = true;
 	for(size_t iii=0 ; iii<m_listConfig.size() ; iii++) {
-		if (m_listConfig[iii].getConfig() == NULL) {
+		if (m_listConfig[iii].getConfig() == nullptr) {
 			continue;
 		}
 		std::string value = getConfig(m_listConfig[iii].getConfig());
-		if (NULL != m_listConfig[iii].getDefault() ) {
+		if (nullptr != m_listConfig[iii].getDefault() ) {
 			if (value == m_listConfig[iii].getDefault() ) {
 				// nothing to add on the XML :
 				continue;
@@ -390,7 +390,7 @@ bool ewol::Object::onGetConfig(const char* _config, std::string& _result) const
 
 bool ewol::Object::setConfig(const std::string& _config, const std::string& _value) {
 	for(size_t iii=0 ; iii<m_listConfig.size() ; iii++) {
-		if (NULL != m_listConfig[iii].getConfig()) {
+		if (nullptr != m_listConfig[iii].getConfig()) {
 			if (_config == m_listConfig[iii].getConfig() ) {
 				// call config with standard parameter
 				return setConfig(ewol::object::Config(m_listConfig[iii].getConfig(), _value));
@@ -403,7 +403,7 @@ bool ewol::Object::setConfig(const std::string& _config, const std::string& _val
 
 std::string ewol::Object::getConfig(const char* _config) const {
 	std::string res="";
-	if (NULL != _config) {
+	if (nullptr != _config) {
 		onGetConfig(_config, res);
 	}
 	return res;
@@ -411,7 +411,7 @@ std::string ewol::Object::getConfig(const char* _config) const {
 
 std::string ewol::Object::getConfig(const std::string& _config) const {
 	for(size_t iii=0 ; iii<m_listConfig.size() ; iii++) {
-		if (NULL != m_listConfig[iii].getConfig()) {
+		if (nullptr != m_listConfig[iii].getConfig()) {
 			if (_config == m_listConfig[iii].getConfig() ) {
 				// call config with standard parameter
 				return getConfig(m_listConfig[iii].getConfig());
@@ -424,7 +424,7 @@ std::string ewol::Object::getConfig(const std::string& _config) const {
 
 bool ewol::Object::setConfigNamed(const std::string& _objectName, const ewol::object::Config& _conf) {
 	ewol::object::Shared<ewol::Object> object = getObjectManager().get(_objectName);
-	if (object == NULL) {
+	if (object == nullptr) {
 		return false;
 	}
 	return object->setConfig(_conf);
@@ -432,7 +432,7 @@ bool ewol::Object::setConfigNamed(const std::string& _objectName, const ewol::ob
 
 bool ewol::Object::setConfigNamed(const std::string& _objectName, const std::string& _config, const std::string& _value) {
 	ewol::object::Shared<ewol::Object> object = getObjectManager().get(_objectName);
-	if (object == NULL) {
+	if (object == nullptr) {
 		return false;
 	}
 	return object->setConfig(_config, _value);
diff --git a/sources/ewol/object/Object.h b/sources/ewol/object/Object.h
index 9aacd4a7..fd774eb1 100644
--- a/sources/ewol/object/Object.h
+++ b/sources/ewol/object/Object.h
@@ -184,15 +184,15 @@ namespace ewol {
 			 */
 			void registerOnEvent(ewol::object::Shared<ewol::Object> _destinationObject,
 			                     const char * _eventId,
-			                     const char * _eventIdgenerated = NULL,
+			                     const char * _eventIdgenerated = nullptr,
 			                     const std::string& _overloadData = "");
 			/**
 			 * @brief Un-Register an Object over an other.
 			 * @param[in] _destinationObject pointer on the object that might be call when an event is generated
-			 * @param[in] _eventId Event generate inside the object (NULL to remove all event on this object)
+			 * @param[in] _eventId Event generate inside the object (nullptr to remove all event on this object)
 			 */
 			void unRegisterOnEvent(ewol::object::Shared<ewol::Object> _destinationObject,
-			                       const char * _eventId = NULL);
+			                       const char * _eventId = nullptr);
 			/**
 			 * @brief Inform object that an other object is removed ...
 			 * @note : Sub classes must call this class
@@ -217,10 +217,10 @@ namespace ewol {
 			 * @param[in] _default Default value of this parameter.
 			 */
 			void registerConfig(const char* _config,
-			                    const char* _type = NULL,
-			                    const char* _control = NULL,
-			                    const char* _description = NULL,
-			                    const char* _default = NULL);
+			                    const char* _type = nullptr,
+			                    const char* _control = nullptr,
+			                    const char* _description = nullptr,
+			                    const char* _default = nullptr);
 			/**
 			 * @brief Configuration requested to the curent Object
 			 * @param[in] _conf Configuration handle.
diff --git a/sources/ewol/object/Owner.h b/sources/ewol/object/Owner.h
index bbe3fc9c..65a2a43f 100644
--- a/sources/ewol/object/Owner.h
+++ b/sources/ewol/object/Owner.h
@@ -103,12 +103,12 @@ namespace ewol {
 	//! @not in doc
 	template<typename T2>
 	inline bool operator==(const object::Owner<T2>& _obj, std::nullptr_t) noexcept {
-		return _obj.get() == NULL;
+		return _obj.get() == nullptr;
 	}
 	//! @not in doc
 	template<typename T2>
 	inline bool operator==(std::nullptr_t, const object::Owner<T2>& _obj) noexcept {
-		return _obj.get() == NULL;
+		return _obj.get() == nullptr;
 	}
 	//! @not in doc
 	template<typename T, typename T2, typename = typename
@@ -131,12 +131,12 @@ namespace ewol {
 	//! @not in doc
 	template<typename T>
 	inline bool operator!=(const object::Owner<T>& _obj, std::nullptr_t) noexcept {
-		return _obj.get() != NULL;
+		return _obj.get() != nullptr;
 	}
 	//! @not in doc
 	template<typename T>
 	inline bool operator!=(std::nullptr_t, const object::Owner<T>& _obj) noexcept {
-		return _obj.get() != NULL;
+		return _obj.get() != nullptr;
 	}
 	//! @not in doc
 	template<typename T, typename T2, typename = typename
diff --git a/sources/ewol/object/Shared.h b/sources/ewol/object/Shared.h
index a0d975d4..1e0388c9 100644
--- a/sources/ewol/object/Shared.h
+++ b/sources/ewol/object/Shared.h
@@ -124,12 +124,12 @@ namespace ewol {
 	//! @not in doc
 	template<typename T2>
 	inline bool operator==(const object::Shared<T2>& _obj, std::nullptr_t) noexcept {
-		return _obj.get() == NULL;
+		return _obj.get() == nullptr;
 	}
 	//! @not in doc
 	template<typename T2>
 	inline bool operator==(std::nullptr_t, const object::Shared<T2>& _obj) noexcept {
-		return _obj.get() == NULL;
+		return _obj.get() == nullptr;
 	}
 	//! @not in doc
 	template<typename T, typename T2, typename = typename
@@ -162,12 +162,12 @@ namespace ewol {
 	//! @not in doc
 	template<typename T>
 	inline bool operator!=(const object::Shared<T>& _obj, std::nullptr_t) noexcept {
-		return _obj.get() != NULL;
+		return _obj.get() != nullptr;
 	}
 	//! @not in doc
 	template<typename T>
 	inline bool operator!=(std::nullptr_t, const object::Shared<T>& _obj) noexcept {
-		return _obj.get() != NULL;
+		return _obj.get() != nullptr;
 	}
 	//! @not in doc
 	template<typename T, typename T2, typename = typename
diff --git a/sources/ewol/resource/ColorFile.cpp b/sources/ewol/resource/ColorFile.cpp
index 9fb1f22f..a883b3b9 100644
--- a/sources/ewol/resource/ColorFile.cpp
+++ b/sources/ewol/resource/ColorFile.cpp
@@ -44,13 +44,13 @@ void ewol::resource::ColorFile::reload() {
 		return;
 	}
 	ejson::Array* baseArray = doc.getArray("color");
-	if (baseArray == NULL) {
+	if (baseArray == nullptr) {
 		EWOL_ERROR("Can not get basic array : 'color'");
 		return;
 	}
 	for (int32_t iii = 0; iii < baseArray->size(); ++iii) {
 		ejson::Object* tmpObj = baseArray->getObject(iii);
-		if (tmpObj == NULL) {
+		if (tmpObj == nullptr) {
 			EWOL_DEBUG(" can not get object in 'color' id=" << iii);
 			continue;
 		}
@@ -77,35 +77,35 @@ int32_t ewol::resource::ColorFile::request(const std::string& _paramName) {
 
 ewol::resource::ColorFile* ewol::resource::ColorFile::keep(const std::string& _filename) {
 	EWOL_INFO("KEEP : ColorFile : file : \"" << _filename << "\"");
-	ewol::resource::ColorFile* object = NULL;
+	ewol::resource::ColorFile* object = nullptr;
 	ewol::Resource* object2 = getManager().localKeep(_filename);
-	if (NULL != object2) {
+	if (nullptr != object2) {
 		object = dynamic_cast<ewol::resource::ColorFile*>(object2);
-		if (NULL == object) {
+		if (nullptr == object) {
 			EWOL_CRITICAL("Request resource file : '" << _filename << "' With the wrong type (dynamic cast error)");
-			return NULL;
+			return nullptr;
 		}
 	}
-	if (NULL != object) {
+	if (nullptr != object) {
 		return object;
 	}
 	// this element create a new one every time ....
 	object = new ewol::resource::ColorFile(_filename);
-	if (NULL == object) {
+	if (nullptr == object) {
 		EWOL_ERROR("allocation error of a resource : " << _filename);
-		return NULL;
+		return nullptr;
 	}
 	getManager().localAdd(object);
 	return object;
 }
 
 void ewol::resource::ColorFile::release(ewol::resource::ColorFile*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		return;
 	}
 	ewol::Resource* object2 = static_cast<ewol::Resource*>(_object);
 	getManager().release(object2);
-	_object = NULL;
+	_object = nullptr;
 }
 
 
diff --git a/sources/ewol/resource/ColorFile.h b/sources/ewol/resource/ColorFile.h
index e6f05042..cffa6a25 100644
--- a/sources/ewol/resource/ColorFile.h
+++ b/sources/ewol/resource/ColorFile.h
@@ -73,7 +73,7 @@ namespace ewol {
 				 * @brief keep the resource pointer.
 				 * @note Never free this pointer by your own...
 				 * @param[in] _filename Name of the configuration file.
-				 * @return pointer on the resource or NULL if an error occured.
+				 * @return pointer on the resource or nullptr if an error occured.
 				 */
 				static ewol::resource::ColorFile* keep(const std::string& _filename);
 				/**
diff --git a/sources/ewol/resource/Colored3DObject.cpp b/sources/ewol/resource/Colored3DObject.cpp
index fe29992b..0a4ba246 100644
--- a/sources/ewol/resource/Colored3DObject.cpp
+++ b/sources/ewol/resource/Colored3DObject.cpp
@@ -15,12 +15,12 @@
 
 
 ewol::resource::Colored3DObject::Colored3DObject() :
-  m_GLprogram(NULL) {
+  m_GLprogram(nullptr) {
 	addObjectType("ewol::Colored3DObject");
 	// get the shader resource :
 	m_GLPosition = 0;
 	m_GLprogram = ewol::resource::Program::keep("DATA:simple3D.prog");
-	if (NULL != m_GLprogram ) {
+	if (nullptr != m_GLprogram ) {
 		m_GLPosition = m_GLprogram->getAttribute("EW_coord3d");
 		m_GLColor    = m_GLprogram->getUniform("EW_color");
 		m_GLMatrix   = m_GLprogram->getUniform("EW_MatrixTransformation");
@@ -40,7 +40,7 @@ void ewol::resource::Colored3DObject::draw(std::vector<vec3>& _vertices,
 	if (_vertices.size() <= 0) {
 		return;
 	}
-	if (m_GLprogram == NULL) {
+	if (m_GLprogram == nullptr) {
 		EWOL_ERROR("No shader ...");
 		return;
 	}
@@ -83,7 +83,7 @@ void ewol::resource::Colored3DObject::draw(std::vector<vec3>& _vertices,
 	if (_vertices.size() <= 0) {
 		return;
 	}
-	if (m_GLprogram == NULL) {
+	if (m_GLprogram == nullptr) {
 		EWOL_ERROR("No shader ...");
 		return;
 	}
@@ -123,7 +123,7 @@ void ewol::resource::Colored3DObject::drawLine(std::vector<vec3>& _vertices,
 	if (_vertices.size() <= 0) {
 		return;
 	}
-	if (m_GLprogram == NULL) {
+	if (m_GLprogram == nullptr) {
 		EWOL_ERROR("No shader ...");
 		return;
 	}
@@ -159,19 +159,19 @@ ewol::resource::Colored3DObject* ewol::resource::Colored3DObject::keep() {
 	EWOL_VERBOSE("KEEP : direct Colored3DObject");
 	// need to crate a new one ...
 	ewol::resource::Colored3DObject* object = new ewol::resource::Colored3DObject();
-	if (NULL == object) {
+	if (nullptr == object) {
 		EWOL_ERROR("allocation error of a resource : ???Colored3DObject??? ");
-		return NULL;
+		return nullptr;
 	}
 	getManager().localAdd(object);
 	return object;
 }
 
 void ewol::resource::Colored3DObject::release(ewol::resource::Colored3DObject*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		return;
 	}
 	ewol::Resource* object2 = static_cast<ewol::Resource*>(_object);
 	getManager().release(object2);
-	_object = NULL;
+	_object = nullptr;
 }
diff --git a/sources/ewol/resource/Colored3DObject.h b/sources/ewol/resource/Colored3DObject.h
index d1de6869..89499b6b 100644
--- a/sources/ewol/resource/Colored3DObject.h
+++ b/sources/ewol/resource/Colored3DObject.h
@@ -45,7 +45,7 @@ namespace ewol {
 				/**
 				 * @brief keep the resource pointer.
 				 * @note Never free this pointer by your own...
-				 * @return pointer on the resource or NULL if an error occured.
+				 * @return pointer on the resource or nullptr if an error occured.
 				 */
 				static ewol::resource::Colored3DObject* keep();
 				/**
diff --git a/sources/ewol/resource/ConfigFile.cpp b/sources/ewol/resource/ConfigFile.cpp
index 0509de91..6e6189a3 100644
--- a/sources/ewol/resource/ConfigFile.cpp
+++ b/sources/ewol/resource/ConfigFile.cpp
@@ -30,9 +30,9 @@ ewol::resource::ConfigFile::ConfigFile(const std::string& _filename) :
 ewol::resource::ConfigFile::~ConfigFile() {
 	// remove all element
 	for (size_t iii=0; iii<m_list.size(); iii++){
-		if (NULL != m_list[iii]) {
+		if (nullptr != m_list[iii]) {
 			delete(m_list[iii]);
-			m_list[iii] = NULL;
+			m_list[iii] = nullptr;
 		}
 	}
 	m_list.clear();
@@ -41,8 +41,8 @@ ewol::resource::ConfigFile::~ConfigFile() {
 void ewol::resource::ConfigFile::reload() {
 	// reset all parameters
 	for (size_t iii=0; iii<m_list.size(); iii++){
-		if (NULL != m_list[iii]) {
-			m_list[iii] = NULL;
+		if (nullptr != m_list[iii]) {
+			m_list[iii] = nullptr;
 		}
 	}
 	m_doc.load(m_name);
@@ -58,7 +58,7 @@ void ewol::resource::ConfigFile::reload() {
 int32_t ewol::resource::ConfigFile::request(const std::string& _paramName) {
 	// check if the parameters existed :
 	if (m_list.exist(_paramName) == false) {
-		m_list.add(_paramName, NULL);
+		m_list.add(_paramName, nullptr);
 	}
 	if (m_doc.exist(_paramName) == true) {
 		m_list[_paramName] = m_doc[_paramName];
@@ -69,11 +69,11 @@ int32_t ewol::resource::ConfigFile::request(const std::string& _paramName) {
 
 double ewol::resource::ConfigFile::getNumber(int32_t _id) {
 	if (    _id < 0
-	     || m_list[_id] == NULL) {
+	     || m_list[_id] == nullptr) {
 		return 0.0;
 	}
 	ejson::Number* tmp = m_list[_id]->toNumber();
-	if (tmp == NULL) {
+	if (tmp == nullptr) {
 		return 0.0;
 	}
 	return tmp->get();
@@ -82,11 +82,11 @@ double ewol::resource::ConfigFile::getNumber(int32_t _id) {
 const std::string& ewol::resource::ConfigFile::getString(int32_t _id) {
 	static const std::string& errorString("");
 	if (    _id < 0
-	     || m_list[_id] == NULL) {
+	     || m_list[_id] == nullptr) {
 		return errorString;
 	}
 	ejson::String* tmp = m_list[_id]->toString();
-	if (tmp == NULL) {
+	if (tmp == nullptr) {
 		return errorString;
 	}
 	return tmp->get();
@@ -94,11 +94,11 @@ const std::string& ewol::resource::ConfigFile::getString(int32_t _id) {
 
 bool ewol::resource::ConfigFile::getBoolean(int32_t _id) {
 	if (    _id < 0
-	     || m_list[_id] == NULL) {
+	     || m_list[_id] == nullptr) {
 		return false;
 	}
 	ejson::Boolean* tmp = m_list[_id]->toBoolean();
-	if (tmp == NULL) {
+	if (tmp == nullptr) {
 		return false;
 	}
 	return tmp->get();
@@ -106,35 +106,35 @@ bool ewol::resource::ConfigFile::getBoolean(int32_t _id) {
 
 ewol::resource::ConfigFile* ewol::resource::ConfigFile::keep(const std::string& _filename) {
 	EWOL_INFO("KEEP : SimpleConfig : file : \"" << _filename << "\"");
-	ewol::resource::ConfigFile* object = NULL;
+	ewol::resource::ConfigFile* object = nullptr;
 	ewol::Resource* object2 = getManager().localKeep(_filename);
-	if (NULL != object2) {
+	if (nullptr != object2) {
 		object = dynamic_cast<ewol::resource::ConfigFile*>(object2);
-		if (NULL == object) {
+		if (nullptr == object) {
 			EWOL_CRITICAL("Request resource file : '" << _filename << "' With the wrong type (dynamic cast error)");
-			return NULL;
+			return nullptr;
 		}
 	}
-	if (NULL != object) {
+	if (nullptr != object) {
 		return object;
 	}
 	// this element create a new one every time ....
 	object = new ewol::resource::ConfigFile(_filename);
-	if (NULL == object) {
+	if (nullptr == object) {
 		EWOL_ERROR("allocation error of a resource : '" << _filename << "'");
-		return NULL;
+		return nullptr;
 	}
 	getManager().localAdd(object);
 	return object;
 }
 
 void ewol::resource::ConfigFile::release(ewol::resource::ConfigFile*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		return;
 	}
 	ewol::Resource* object2 = static_cast<ewol::Resource*>(_object);
 	getManager().release(object2);
-	_object = NULL;
+	_object = nullptr;
 }
 
 
diff --git a/sources/ewol/resource/ConfigFile.h b/sources/ewol/resource/ConfigFile.h
index 33af6bc0..8d1a08f1 100644
--- a/sources/ewol/resource/ConfigFile.h
+++ b/sources/ewol/resource/ConfigFile.h
@@ -37,7 +37,7 @@ namespace ewol {
 				 * @brief keep the resource pointer.
 				 * @note Never free this pointer by your own...
 				 * @param[in] _filename Name of the configuration file.
-				 * @return pointer on the resource or NULL if an error occured.
+				 * @return pointer on the resource or nullptr if an error occured.
 				 */
 				static ewol::resource::ConfigFile* keep(const std::string& _filename);
 				/**
diff --git a/sources/ewol/resource/DistanceFieldFont.cpp b/sources/ewol/resource/DistanceFieldFont.cpp
index b34e3046..1f2395ea 100644
--- a/sources/ewol/resource/DistanceFieldFont.cpp
+++ b/sources/ewol/resource/DistanceFieldFont.cpp
@@ -29,7 +29,7 @@ ewol::resource::DistanceFieldFont::DistanceFieldFont(const std::string& _fontNam
   m_borderSize(10),
   m_textureBorderSize(0,0) {
 	addObjectType("ewol::resource::DistanceFieldFont");
-	m_font = NULL;
+	m_font = nullptr;
 	m_lastGlyphPos.setValue(1,1);
 	m_lastRawHeigh = 0;
 	m_sizeRatio = 1.0f;
@@ -84,18 +84,18 @@ ewol::resource::DistanceFieldFont::DistanceFieldFont(const std::string& _fontNam
 	
 	if (m_fileName.size() == 0) {
 		EWOL_ERROR("can not load FONT name : '" << m_fileName << "'" );
-		m_font = NULL;
+		m_font = nullptr;
 		return;
 	}
 	EWOL_INFO("Load FONT name : '" << m_fileName << "'");
 	m_font = ewol::resource::FontFreeType::keep(m_fileName);
-	if (m_font == NULL) {
+	if (m_font == nullptr) {
 		EWOL_ERROR("Pb Loading FONT name : '" << m_fileName << "'" );
 	}
 	
 	// set the bassic charset:
 	m_listElement.clear();
-	if (m_font == NULL) {
+	if (m_font == nullptr) {
 		return;
 	}
 	if (importFromFile() == true) {
@@ -211,7 +211,7 @@ void ewol::resource::DistanceFieldFont::generateDistanceField(const egami::Image
 
 bool ewol::resource::DistanceFieldFont::addGlyph(const char32_t& _val) {
 	bool hasChange = false;
-	if (m_font == NULL) {
+	if (m_font == nullptr) {
 		return false;
 	}
 	// add the curent "char"
@@ -325,7 +325,7 @@ ewol::GlyphProperty* ewol::resource::DistanceFieldFont::getGlyphPointer(const ch
 		if (m_listElement.size() > 0) {
 			return &((m_listElement)[0]);
 		}
-		return NULL;
+		return nullptr;
 	}
 	//EWOL_ERROR("      index=" << index);
 	//EWOL_ERROR("      m_UVal=" << m_listElement[_displayMode][index].m_UVal);
@@ -337,31 +337,31 @@ ewol::GlyphProperty* ewol::resource::DistanceFieldFont::getGlyphPointer(const ch
 
 ewol::resource::DistanceFieldFont* ewol::resource::DistanceFieldFont::keep(const std::string& _filename) {
 	EWOL_VERBOSE("KEEP : DistanceFieldFont : file : '" << _filename << "'");
-	ewol::resource::DistanceFieldFont* object = NULL;
+	ewol::resource::DistanceFieldFont* object = nullptr;
 	ewol::Resource* object2 = getManager().localKeep(_filename);
-	if (NULL != object2) {
+	if (nullptr != object2) {
 		object = dynamic_cast<ewol::resource::DistanceFieldFont*>(object2);
-		if (NULL == object) {
+		if (nullptr == object) {
 			EWOL_CRITICAL("Request resource file : '" << _filename << "' With the wrong type (dynamic cast error)");
-			return NULL;
+			return nullptr;
 		}
 	}
-	if (NULL != object) {
+	if (nullptr != object) {
 		return object;
 	}
 	// need to crate a new one ...
 	EWOL_DEBUG("CREATE: DistanceFieldFont : file : '" << _filename << "'");
 	object = new ewol::resource::DistanceFieldFont(_filename);
-	if (NULL == object) {
+	if (nullptr == object) {
 		EWOL_ERROR("allocation error of a resource : " << _filename);
-		return NULL;
+		return nullptr;
 	}
 	getManager().localAdd(object);
 	return object;
 }
 
 void ewol::resource::DistanceFieldFont::release(ewol::resource::DistanceFieldFont*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		return;
 	}
 	std::string name = _object->getName();
@@ -371,20 +371,20 @@ void ewol::resource::DistanceFieldFont::release(ewol::resource::DistanceFieldFon
 		EWOL_DEBUG("REMOVE: DistanceFieldFont : file : '" << name << "' count=" << count);
 		//etk::displayBacktrace(false);
 	}
-	_object = NULL;
+	_object = nullptr;
 }
 
 void ewol::resource::DistanceFieldFont::exportOnFile() {
 	EWOL_DEBUG("EXPORT: DistanceFieldFont : file : '" << m_fileName << ".json'");
 	ejson::Document doc;
 	ejson::Array* tmpList = new ejson::Array();
-	if (tmpList == NULL) {
-		EWOL_ERROR("NULL pointer");
+	if (tmpList == nullptr) {
+		EWOL_ERROR("nullptr pointer");
 		return;
 	}
 	for (size_t iii=0; iii<m_listElement.size(); ++iii) {
 		ejson::Object* tmpObj = new ejson::Object();
-		if (tmpObj == NULL) {
+		if (tmpObj == nullptr) {
 			continue;
 		}
 		tmpObj->addString("m_UVal", std::to_string(m_listElement[iii].m_UVal));
@@ -427,14 +427,14 @@ bool ewol::resource::DistanceFieldFont::importFromFile() {
 	m_borderSize = doc.getNumberValue("m_borderSize", 2);
 	m_textureBorderSize = doc.addString("m_textureBorderSize", "0,0");
 	ejson::Array* tmpList = doc.getArray("m_listElement");
-	if (tmpList == NULL) {
-		EWOL_ERROR("NULL pointer array");
+	if (tmpList == nullptr) {
+		EWOL_ERROR("nullptr pointer array");
 		return false;
 	}
 	m_listElement.clear();
 	for (size_t iii=0; iii<tmpList->size(); ++iii) {
 		ejson::Object* tmpObj = tmpList->getObject(iii);
-		if (tmpObj == NULL) {
+		if (tmpObj == nullptr) {
 			continue;
 		}
 		GlyphProperty prop;
diff --git a/sources/ewol/resource/DistanceFieldFont.h b/sources/ewol/resource/DistanceFieldFont.h
index 1a87396a..b1c42c56 100644
--- a/sources/ewol/resource/DistanceFieldFont.h
+++ b/sources/ewol/resource/DistanceFieldFont.h
@@ -60,7 +60,7 @@ namespace ewol {
 				/**
 				 * @brief get the pointer on the coresponding glyph
 				 * @param[in] _charcode The unicodeValue
-				 * @return The pointer on the glyph  == > never NULL
+				 * @return The pointer on the glyph  == > never nullptr
 				 */
 				ewol::GlyphProperty* getGlyphPointer(const char32_t& _charcode);
 			public:
@@ -68,7 +68,7 @@ namespace ewol {
 				 * @brief keep the resource pointer.
 				 * @note Never free this pointer by your own...
 				 * @param[in] _filename Name of the texture font.
-				 * @return pointer on the resource or NULL if an error occured.
+				 * @return pointer on the resource or nullptr if an error occured.
 				 */
 				static ewol::resource::DistanceFieldFont* keep(const std::string& _filename);
 				/**
diff --git a/sources/ewol/resource/FontFreeType.cpp b/sources/ewol/resource/FontFreeType.cpp
index 39b0ed53..96250879 100644
--- a/sources/ewol/resource/FontFreeType.cpp
+++ b/sources/ewol/resource/FontFreeType.cpp
@@ -46,7 +46,7 @@ void ewol::resource::freeTypeUnInit() {
 		return;
 	}
 	int32_t error = FT_Done_FreeType( library );
-	library = NULL;
+	library = nullptr;
 	if(0 != error) {
 		EWOL_CRITICAL(" when Un-loading FreeType Librairy ...");
 	}
@@ -56,7 +56,7 @@ ewol::resource::FontFreeType::FontFreeType(const std::string& _fontName) :
   FontBase(_fontName) {
 	addObjectType("ewol::FontFreeType");
 	m_init = false;
-	m_FileBuffer = NULL;
+	m_FileBuffer = nullptr;
 	m_FileSize = 0;
 	
 	etk::FSNode myfile(_fontName);
@@ -75,7 +75,7 @@ ewol::resource::FontFreeType::FontFreeType(const std::string& _fontName) :
 	}
 	// allocate data
 	m_FileBuffer = new FT_Byte[m_FileSize];
-	if (NULL == m_FileBuffer) {
+	if (nullptr == m_FileBuffer) {
 		EWOL_ERROR("Error Memory allocation size=" << _fontName);
 		return;
 	}
@@ -99,9 +99,9 @@ ewol::resource::FontFreeType::FontFreeType(const std::string& _fontName) :
 
 ewol::resource::FontFreeType::~FontFreeType() {
 	// clean the tmp memory
-	if (NULL != m_FileBuffer) {
+	if (nullptr != m_FileBuffer) {
 		delete[] m_FileBuffer;
-		m_FileBuffer = NULL;
+		m_FileBuffer = nullptr;
 	}
 	// must be deleted fftFace
 	FT_Done_Face( m_fftFace );
@@ -392,34 +392,34 @@ void ewol::resource::FontFreeType::display() {
 
 ewol::resource::FontBase* ewol::resource::FontFreeType::keep(const std::string& _filename) {
 	EWOL_VERBOSE("KEEP : Font : file : \"" << _filename << "\"");
-	ewol::resource::FontBase* object = NULL;
+	ewol::resource::FontBase* object = nullptr;
 	ewol::Resource* object2 = getManager().localKeep(_filename);
-	if (NULL != object2) {
+	if (nullptr != object2) {
 		object = dynamic_cast<ewol::resource::FontBase*>(object2);
-		if (NULL == object) {
+		if (nullptr == object) {
 			EWOL_CRITICAL("Request resource file : '" << _filename << "' With the wrong type (dynamic cast error)");
-			return NULL;
+			return nullptr;
 		}
 	}
-	if (NULL != object) {
+	if (nullptr != object) {
 		return object;
 	}
 	// need to crate a new one ...
 	object = new ewol::resource::FontFreeType(_filename);
-	if (NULL == object) {
+	if (nullptr == object) {
 		EWOL_ERROR("allocation error of a resource : " << _filename);
-		return NULL;
+		return nullptr;
 	}
 	getManager().localAdd(object);
 	return object;
 }
 
 void ewol::resource::FontFreeType::release(ewol::resource::FontBase*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		return;
 	}
 	ewol::Resource* object2 = static_cast<ewol::Resource*>(_object);
 	getManager().release(object2);
-	_object = NULL;
+	_object = nullptr;
 }
 
diff --git a/sources/ewol/resource/FontFreeType.h b/sources/ewol/resource/FontFreeType.h
index 26889a18..46dc453a 100644
--- a/sources/ewol/resource/FontFreeType.h
+++ b/sources/ewol/resource/FontFreeType.h
@@ -58,7 +58,7 @@ namespace ewol {
 				 * @brief keep the resource pointer.
 				 * @note Never free this pointer by your own...
 				 * @param[in] _filename Name of the base font.
-				 * @return pointer on the resource or NULL if an error occured.
+				 * @return pointer on the resource or nullptr if an error occured.
 				 */
 				static ewol::resource::FontBase* keep(const std::string& _filename);
 				/**
diff --git a/sources/ewol/resource/Image.cpp b/sources/ewol/resource/Image.cpp
index a859d54f..0089e3c0 100644
--- a/sources/ewol/resource/Image.cpp
+++ b/sources/ewol/resource/Image.cpp
@@ -66,9 +66,9 @@ ewol::resource::TextureFile* ewol::resource::TextureFile::keep(const std::string
 	EWOL_VERBOSE("KEEP: TextureFile: '" << _filename << "' size=" << _size);
 	if (_filename == "") {
 		ewol::resource::TextureFile* object = new ewol::resource::TextureFile("");
-		if (NULL == object) {
+		if (nullptr == object) {
 			EWOL_ERROR("allocation error of a resource : ??TEX??");
-			return NULL;
+			return nullptr;
 		}
 		getManager().localAdd(object);
 		return object;
@@ -101,24 +101,24 @@ ewol::resource::TextureFile* ewol::resource::TextureFile::keep(const std::string
 	}
 	
 	EWOL_VERBOSE("KEEP: TextureFile: '" << TmpFilename << "' new size=" << _size);
-	ewol::resource::TextureFile* object = NULL;
+	ewol::resource::TextureFile* object = nullptr;
 	ewol::Resource* object2 = getManager().localKeep(TmpFilename);
-	if (NULL != object2) {
+	if (nullptr != object2) {
 		object = dynamic_cast<ewol::resource::TextureFile*>(object2);
-		if (NULL == object) {
+		if (nullptr == object) {
 			EWOL_CRITICAL("Request resource file : '" << TmpFilename << "' With the wrong type (dynamic cast error)");
-			return NULL;
+			return nullptr;
 		}
 	}
-	if (NULL != object) {
+	if (nullptr != object) {
 		return object;
 	}
 	EWOL_INFO("CREATE: TextureFile: '" << TmpFilename << "' size=" << _size);
 	// need to crate a new one ...
 	object = new ewol::resource::TextureFile(TmpFilename, _filename, _size);
-	if (NULL == object) {
+	if (nullptr == object) {
 		EWOL_ERROR("allocation error of a resource : " << _filename);
-		return NULL;
+		return nullptr;
 	}
 	getManager().localAdd(object);
 	return object;
@@ -126,11 +126,11 @@ ewol::resource::TextureFile* ewol::resource::TextureFile::keep(const std::string
 
 
 void ewol::resource::TextureFile::release(ewol::resource::TextureFile*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		return;
 	}
 	ewol::Resource* object2 = static_cast<ewol::Resource*>(_object);
 	getManager().release(object2);
-	_object = NULL;
+	_object = nullptr;
 }
 
diff --git a/sources/ewol/resource/Image.h b/sources/ewol/resource/Image.h
index 2966e09f..6db3e60b 100644
--- a/sources/ewol/resource/Image.h
+++ b/sources/ewol/resource/Image.h
@@ -34,7 +34,7 @@ namespace ewol {
 				 * @note Never free this pointer by your own...
 				 * @param[in] _filename Name of the image file.
 				 * @param[in] _requested size of the image (usefull when loading .svg to automatic rescale)
-				 * @return pointer on the resource or NULL if an error occured.
+				 * @return pointer on the resource or nullptr if an error occured.
 				 */
 				static ewol::resource::TextureFile* keep(const std::string& _filename, ivec2 _size=ivec2(-1,-1));
 				/**
diff --git a/sources/ewol/resource/ImageDF.cpp b/sources/ewol/resource/ImageDF.cpp
index 5bb9ffe3..ed82a2d4 100644
--- a/sources/ewol/resource/ImageDF.cpp
+++ b/sources/ewol/resource/ImageDF.cpp
@@ -155,9 +155,9 @@ ewol::resource::ImageDF* ewol::resource::ImageDF::keep(const std::string& _filen
 	EWOL_VERBOSE("KEEP: TextureFile: '" << _filename << "' size=" << _size);
 	if (_filename == "") {
 		ewol::resource::ImageDF* object = new ewol::resource::ImageDF("");
-		if (NULL == object) {
+		if (nullptr == object) {
 			EWOL_ERROR("allocation error of a resource : ??TEX??");
-			return NULL;
+			return nullptr;
 		}
 		getManager().localAdd(object);
 		return object;
@@ -190,24 +190,24 @@ ewol::resource::ImageDF* ewol::resource::ImageDF::keep(const std::string& _filen
 	}
 	
 	EWOL_VERBOSE("KEEP: TextureFile: '" << TmpFilename << "' new size=" << _size);
-	ewol::resource::ImageDF* object = NULL;
+	ewol::resource::ImageDF* object = nullptr;
 	ewol::Resource* object2 = getManager().localKeep("DF__" + TmpFilename);
-	if (NULL != object2) {
+	if (nullptr != object2) {
 		object = dynamic_cast<ewol::resource::ImageDF*>(object2);
-		if (NULL == object) {
+		if (nullptr == object) {
 			EWOL_CRITICAL("Request resource file : '" << TmpFilename << "' With the wrong type (dynamic cast error)");
-			return NULL;
+			return nullptr;
 		}
 	}
-	if (NULL != object) {
+	if (nullptr != object) {
 		return object;
 	}
 	EWOL_INFO("CREATE: ImageDF: '" << TmpFilename << "' size=" << _size);
 	// need to crate a new one ...
 	object = new ewol::resource::ImageDF("DF__" + TmpFilename, _filename, _size);
-	if (NULL == object) {
+	if (nullptr == object) {
 		EWOL_ERROR("allocation error of a resource : " << _filename);
-		return NULL;
+		return nullptr;
 	}
 	getManager().localAdd(object);
 	return object;
@@ -215,11 +215,11 @@ ewol::resource::ImageDF* ewol::resource::ImageDF::keep(const std::string& _filen
 
 
 void ewol::resource::ImageDF::release(ewol::resource::ImageDF*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		return;
 	}
 	ewol::Resource* object2 = static_cast<ewol::Resource*>(_object);
 	getManager().release(object2);
-	_object = NULL;
+	_object = nullptr;
 }
 
diff --git a/sources/ewol/resource/ImageDF.h b/sources/ewol/resource/ImageDF.h
index 2c739bc7..4cd0983c 100644
--- a/sources/ewol/resource/ImageDF.h
+++ b/sources/ewol/resource/ImageDF.h
@@ -41,7 +41,7 @@ namespace ewol {
 				 * @note Never free this pointer by your own...
 				 * @param[in] _filename Name of the image file.
 				 * @param[in] _requested size of the image (usefull when loading .svg to automatic rescale)
-				 * @return pointer on the resource or NULL if an error occured.
+				 * @return pointer on the resource or nullptr if an error occured.
 				 */
 				static ewol::resource::ImageDF* keep(const std::string& _filename, ivec2 _size=ivec2(-1,-1));
 				/**
diff --git a/sources/ewol/resource/Manager.cpp b/sources/ewol/resource/Manager.cpp
index f8387366..298888f9 100644
--- a/sources/ewol/resource/Manager.cpp
+++ b/sources/ewol/resource/Manager.cpp
@@ -41,12 +41,12 @@ void ewol::resource::Manager::unInit() {
 	m_resourceListToUpdate.clear();
 	// remove all resources ...
 	for (int64_t iii=m_resourceList.size()-1; iii >= 0; iii--) {
-		if (m_resourceList[iii] != NULL) {
+		if (m_resourceList[iii] != nullptr) {
 			EWOL_WARNING("Find a resource that is not removed : [" << m_resourceList[iii]->getId() << "]"
 			             << "=\"" << m_resourceList[iii]->getName() << "\" "
 			             << m_resourceList[iii]->getCounter() << " elements");
 			delete(m_resourceList[iii]);
-			m_resourceList[iii] = NULL;
+			m_resourceList[iii] = nullptr;
 		}
 	}
 	m_resourceList.clear();
@@ -56,7 +56,7 @@ void ewol::resource::Manager::display() {
 	EWOL_INFO("Resources loaded : ");
 	// remove all resources ...
 	for (int64_t iii=m_resourceList.size()-1; iii >= 0; iii--) {
-		if (m_resourceList[iii] != NULL) {
+		if (m_resourceList[iii] != nullptr) {
 			EWOL_INFO("    [" << m_resourceList[iii]->getId() << "]"
 			          << m_resourceList[iii]->getObjectType()
 			          << "=\"" << m_resourceList[iii]->getName() << "\" "
@@ -73,7 +73,7 @@ void ewol::resource::Manager::reLoadResources() {
 		for (size_t jjj=0; jjj<MAX_RESOURCE_LEVEL; jjj++) {
 			EWOL_INFO("    Reload level : " << jjj << "/" << (MAX_RESOURCE_LEVEL-1));
 			for (int64_t iii=m_resourceList.size()-1; iii >= 0; iii--) {
-				if(m_resourceList[iii] != NULL) {
+				if(m_resourceList[iii] != nullptr) {
 					if (jjj == m_resourceList[iii]->getResourceLevel()) {
 						m_resourceList[iii]->reload();
 						EWOL_INFO("        [" << m_resourceList[iii]->getId() << "]="<< m_resourceList[iii]->getObjectType());
@@ -90,7 +90,7 @@ void ewol::resource::Manager::reLoadResources() {
 void ewol::resource::Manager::update(ewol::Resource* _object) {
 	// chek if not added before
 	for (size_t iii=0; iii<m_resourceListToUpdate.size(); iii++) {
-		if (m_resourceListToUpdate[iii] != NULL) {
+		if (m_resourceListToUpdate[iii] != nullptr) {
 			if (m_resourceListToUpdate[iii] == _object) {
 				// just prevent some double add ...
 				return;
@@ -110,7 +110,7 @@ void ewol::resource::Manager::updateContext() {
 			for (size_t jjj=0; jjj<MAX_RESOURCE_LEVEL; jjj++) {
 				EWOL_INFO("    updateContext level (D) : " << jjj << "/" << (MAX_RESOURCE_LEVEL-1));
 				for (size_t iii=0; iii<m_resourceList.size(); iii++) {
-					if(m_resourceList[iii] != NULL) {
+					if(m_resourceList[iii] != nullptr) {
 						if (jjj == m_resourceList[iii]->getResourceLevel()) {
 							//EWOL_DEBUG("Update context of " << iii << " named : " << l_resourceList[iii]->getName());
 							m_resourceList[iii]->updateContext();
@@ -124,7 +124,7 @@ void ewol::resource::Manager::updateContext() {
 			for (size_t jjj=0; jjj<MAX_RESOURCE_LEVEL; jjj++) {
 				EWOL_INFO("    updateContext level (U) : " << jjj << "/" << (MAX_RESOURCE_LEVEL-1));
 				for (size_t iii=0; iii<m_resourceListToUpdate.size(); iii++) {
-					if(m_resourceListToUpdate[iii] != NULL) {
+					if(m_resourceListToUpdate[iii] != nullptr) {
 						if (jjj == m_resourceListToUpdate[iii]->getResourceLevel()) {
 							m_resourceListToUpdate[iii]->updateContext();
 						}
@@ -140,7 +140,7 @@ void ewol::resource::Manager::updateContext() {
 // in this case, it is really too late ...
 void ewol::resource::Manager::contextHasBeenDestroyed() {
 	for (size_t iii=0; iii<m_resourceList.size(); iii++) {
-		if (m_resourceList[iii] != NULL) {
+		if (m_resourceList[iii] != nullptr) {
 			m_resourceList[iii]->removeContextToLate();
 		}
 	}
@@ -152,7 +152,7 @@ void ewol::resource::Manager::contextHasBeenDestroyed() {
 ewol::Resource* ewol::resource::Manager::localKeep(const std::string& _filename) {
 	EWOL_VERBOSE("KEEP (DEFAULT) : file : \"" << _filename << "\"");
 	for (size_t iii=0; iii<m_resourceList.size(); iii++) {
-		if (m_resourceList[iii] != NULL) {
+		if (m_resourceList[iii] != nullptr) {
 			if(m_resourceList[iii]->getName() == _filename) {
 				m_resourceList[iii]->increment();
 				return m_resourceList[iii];
@@ -160,14 +160,14 @@ ewol::Resource* ewol::resource::Manager::localKeep(const std::string& _filename)
 		}
 	}
 	// we did not find it ...
-	return NULL;
+	return nullptr;
 }
 
 // internal generic keeper ...
 void ewol::resource::Manager::localAdd(ewol::Resource* _object) {
 	//Add ... find empty slot
 	for (size_t iii=0; iii<m_resourceList.size(); iii++) {
-		if (m_resourceList[iii] == NULL) {
+		if (m_resourceList[iii] == nullptr) {
 			m_resourceList[iii] = _object;
 			return;
 		}
@@ -177,19 +177,19 @@ void ewol::resource::Manager::localAdd(ewol::Resource* _object) {
 }
 
 bool ewol::resource::Manager::release(ewol::Resource*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		EWOL_ERROR("Try to remove a resource that have null pointer ...");
 		return false;
 	}
 	for (size_t iii=0; iii<m_resourceListToUpdate.size(); iii++) {
 		if (m_resourceListToUpdate[iii] == _object) {
-			m_resourceListToUpdate[iii] = NULL;
+			m_resourceListToUpdate[iii] = nullptr;
 			//l_resourceListToUpdate.Erase(iii);
 		}
 	}
 	EWOL_VERBOSE("RELEASE (default) : file : \"" << _object->getName() << "\"");
 	for (int64_t iii=m_resourceList.size()-1; iii >= 0; iii--) {
-		if (m_resourceList[iii] == NULL) {
+		if (m_resourceList[iii] == nullptr) {
 			continue;
 		}
 		if(m_resourceList[iii] != _object) {
@@ -197,20 +197,20 @@ bool ewol::resource::Manager::release(ewol::Resource*& _object) {
 		}
 		if (m_resourceList[iii]->decrement() == true) {
 			// remove element from the list :
-			m_resourceList[iii] = NULL;
+			m_resourceList[iii] = nullptr;
 			// delete element
 			_object->removeObject();
 			// insidiously remove the pointer for the caller ...
-			_object = NULL;
+			_object = nullptr;
 			return true; // object really removed
 		}
 		// insidiously remove the pointer for the caller ...
-		_object = NULL;
+		_object = nullptr;
 		return false; // just decrement ...
 	}
 	EWOL_ERROR("Can not find the resources in the list : " << (int64_t)_object);
 	// insidiously remove the pointer for the caller ...
-	_object = NULL;
+	_object = nullptr;
 	return false;
 }
 
@@ -219,13 +219,13 @@ void ewol::resource::Manager::onObjectRemove(ewol::object::Shared<ewol::Object>
 	for (size_t iii=0; iii<m_resourceList.size(); ++iii) {
 		if (m_resourceList[iii] == _removeObject) {
 			EWOL_WARNING("Remove Resource that is not removed ... ");
-			m_resourceList[iii] = NULL;
+			m_resourceList[iii] = nullptr;
 		}
 	}
 	for (size_t iii=0; iii<m_resourceListToUpdate.size(); ++iii) {
 		if (m_resourceListToUpdate[iii] == _removeObject) {
 			EWOL_WARNING("Remove Resource that is not removed .2. ");
-			m_resourceListToUpdate[iii] = NULL;
+			m_resourceListToUpdate[iii] = nullptr;
 		}
 	}
 }
diff --git a/sources/ewol/resource/Manager.h b/sources/ewol/resource/Manager.h
index 65dcad92..ecd3e40a 100644
--- a/sources/ewol/resource/Manager.h
+++ b/sources/ewol/resource/Manager.h
@@ -63,7 +63,7 @@ namespace ewol {
 			public:
 				/**
 				 * @brief release a resources and free it if the Last release is call.
-				 * @param[in,out] _object element to realease  == > is return at NULL value.
+				 * @param[in,out] _object element to realease  == > is return at nullptr value.
 				 * @return true, if element is removed, and false for just decreasing counter
 				 */
 				bool release(ewol::Resource*& _object);
diff --git a/sources/ewol/resource/Program.cpp b/sources/ewol/resource/Program.cpp
index 82f17934..402c9d9c 100644
--- a/sources/ewol/resource/Program.cpp
+++ b/sources/ewol/resource/Program.cpp
@@ -37,7 +37,7 @@ ewol::resource::Program::Program(const std::string& _filename) :
 		// remove extention ...
 		tmpFilename.erase(tmpFilename.size()-4, 4);
 		ewol::resource::Shader* tmpShader = ewol::resource::Shader::keep(tmpFilename+"vert");
-		if (NULL == tmpShader) {
+		if (nullptr == tmpShader) {
 			EWOL_CRITICAL("Error while getting a specific shader filename : " << tmpFilename);
 			return;
 		} else {
@@ -45,7 +45,7 @@ ewol::resource::Program::Program(const std::string& _filename) :
 			m_shaderList.push_back(tmpShader);
 		}
 		tmpShader = ewol::resource::Shader::keep(tmpFilename+"frag");
-		if (NULL == tmpShader) {
+		if (nullptr == tmpShader) {
 			EWOL_CRITICAL("Error while getting a specific shader filename : " << tmpFilename);
 			return;
 		} else {
@@ -64,7 +64,7 @@ ewol::resource::Program::Program(const std::string& _filename) :
 		}
 		#define MAX_LINE_SIZE   (2048)
 		char tmpData[MAX_LINE_SIZE];
-		while (file.fileGets(tmpData, MAX_LINE_SIZE) != NULL) {
+		while (file.fileGets(tmpData, MAX_LINE_SIZE) != nullptr) {
 			int32_t len = strlen(tmpData);
 			if(    tmpData[len-1] == '\n'
 				|| tmpData[len-1] == '\r') {
@@ -81,7 +81,7 @@ ewol::resource::Program::Program(const std::string& _filename) :
 			// get it with relative position :
 			std::string tmpFilename = file.getRelativeFolder() + tmpData;
 			ewol::resource::Shader* tmpShader = ewol::resource::Shader::keep(tmpFilename);
-			if (NULL == tmpShader) {
+			if (nullptr == tmpShader) {
 				EWOL_CRITICAL("Error while getting a specific shader filename : " << tmpFilename);
 			} else {
 				EWOL_DEBUG("Add shader on program : "<< tmpFilename);
@@ -173,7 +173,7 @@ void ewol::resource::Program::updateContext() {
 		EWOL_DEBUG("Create program with oglID=" << m_program);
 		// first attach vertex shader, and after fragment shader
 		for (size_t iii=0; iii<m_shaderList.size(); iii++) {
-			if (NULL != m_shaderList[iii]) {
+			if (nullptr != m_shaderList[iii]) {
 				if (m_shaderList[iii]->getShaderType() == GL_VERTEX_SHADER) {
 					glAttachShader(m_program, m_shaderList[iii]->getGL_ID());
 					checkGlError("glAttachShader", __LINE__);
@@ -181,7 +181,7 @@ void ewol::resource::Program::updateContext() {
 			}
 		}
 		for (size_t iii=0; iii<m_shaderList.size(); iii++) {
-			if (NULL != m_shaderList[iii]) {
+			if (nullptr != m_shaderList[iii]) {
 				if (m_shaderList[iii]->getShaderType() == GL_FRAGMENT_SHADER) {
 					glAttachShader(m_program, m_shaderList[iii]->getGL_ID());
 					checkGlError("glAttachShader", __LINE__);
@@ -280,13 +280,13 @@ void ewol::resource::Program::reload() {
 		return;
 	}
 	// remove previous data ...
-	if (NULL != m_fileData) {
+	if (nullptr != m_fileData) {
 		delete[] m_fileData;
 		m_fileData = 0;
 	}
 	// allocate data
 	m_fileData = new char[fileSize+5];
-	if (NULL == m_fileData) {
+	if (nullptr == m_fileData) {
 		EWOL_ERROR("Error Memory allocation size=" << fileSize);
 		return;
 	}
@@ -514,8 +514,8 @@ void ewol::resource::Program::uniform1fv(int32_t _idElem, int32_t _nbElement, co
 		EWOL_ERROR("No element to send at open GL ...");
 		return;
 	}
-	if (NULL == _value) {
-		EWOL_ERROR("NULL Input pointer to send at open GL ...");
+	if (nullptr == _value) {
+		EWOL_ERROR("nullptr Input pointer to send at open GL ...");
 		return;
 	}
 	glUniform1fv(m_elementList[_idElem].m_elementId, _nbElement, _value);
@@ -536,8 +536,8 @@ void ewol::resource::Program::uniform2fv(int32_t _idElem, int32_t _nbElement, co
 		EWOL_ERROR("No element to send at open GL ...");
 		return;
 	}
-	if (NULL == _value) {
-		EWOL_ERROR("NULL Input pointer to send at open GL ...");
+	if (nullptr == _value) {
+		EWOL_ERROR("nullptr Input pointer to send at open GL ...");
 		return;
 	}
 	glUniform2fv(m_elementList[_idElem].m_elementId, _nbElement, _value);
@@ -558,8 +558,8 @@ void ewol::resource::Program::uniform3fv(int32_t _idElem, int32_t _nbElement, co
 		EWOL_ERROR("No element to send at open GL ...");
 		return;
 	}
-	if (NULL == _value) {
-		EWOL_ERROR("NULL Input pointer to send at open GL ...");
+	if (nullptr == _value) {
+		EWOL_ERROR("nullptr Input pointer to send at open GL ...");
 		return;
 	}
 	glUniform3fv(m_elementList[_idElem].m_elementId, _nbElement, _value);
@@ -580,8 +580,8 @@ void ewol::resource::Program::uniform4fv(int32_t _idElem, int32_t _nbElement, co
 		EWOL_ERROR("No element to send at open GL ...");
 		return;
 	}
-	if (NULL == _value) {
-		EWOL_ERROR("NULL Input pointer to send at open GL ...");
+	if (nullptr == _value) {
+		EWOL_ERROR("nullptr Input pointer to send at open GL ...");
 		return;
 	}
 	glUniform4fv(m_elementList[_idElem].m_elementId, _nbElement, _value);
@@ -605,8 +605,8 @@ void ewol::resource::Program::uniform1iv(int32_t _idElem, int32_t _nbElement, co
 		EWOL_ERROR("No element to send at open GL ...");
 		return;
 	}
-	if (NULL == _value) {
-		EWOL_ERROR("NULL Input pointer to send at open GL ...");
+	if (nullptr == _value) {
+		EWOL_ERROR("nullptr Input pointer to send at open GL ...");
 		return;
 	}
 	glUniform1iv(m_elementList[_idElem].m_elementId, _nbElement, _value);
@@ -627,8 +627,8 @@ void ewol::resource::Program::uniform2iv(int32_t _idElem, int32_t _nbElement, co
 		EWOL_ERROR("No element to send at open GL ...");
 		return;
 	}
-	if (NULL == _value) {
-		EWOL_ERROR("NULL Input pointer to send at open GL ...");
+	if (nullptr == _value) {
+		EWOL_ERROR("nullptr Input pointer to send at open GL ...");
 		return;
 	}
 	glUniform2iv(m_elementList[_idElem].m_elementId, _nbElement, _value);
@@ -649,8 +649,8 @@ void ewol::resource::Program::uniform3iv(int32_t _idElem, int32_t _nbElement, co
 		EWOL_ERROR("No element to send at open GL ...");
 		return;
 	}
-	if (NULL == _value) {
-		EWOL_ERROR("NULL Input pointer to send at open GL ...");
+	if (nullptr == _value) {
+		EWOL_ERROR("nullptr Input pointer to send at open GL ...");
 		return;
 	}
 	glUniform3iv(m_elementList[_idElem].m_elementId, _nbElement, _value);
@@ -671,8 +671,8 @@ void ewol::resource::Program::uniform4iv(int32_t _idElem, int32_t _nbElement, co
 		EWOL_ERROR("No element to send at open GL ...");
 		return;
 	}
-	if (NULL == _value) {
-		EWOL_ERROR("NULL Input pointer to send at open GL ...");
+	if (nullptr == _value) {
+		EWOL_ERROR("nullptr Input pointer to send at open GL ...");
 		return;
 	}
 	glUniform4iv(m_elementList[_idElem].m_elementId, _nbElement, _value);
@@ -777,23 +777,23 @@ void ewol::resource::Program::unUse() {
 
 ewol::resource::Program* ewol::resource::Program::keep(const std::string& _filename) {
 	EWOL_VERBOSE("KEEP : Program : file : \"" << _filename << "\"");
-	ewol::resource::Program* object = NULL;
+	ewol::resource::Program* object = nullptr;
 	ewol::Resource* object2 = getManager().localKeep(_filename);
-	if (NULL != object2) {
+	if (nullptr != object2) {
 		object = dynamic_cast<ewol::resource::Program*>(object2);
-		if (NULL == object) {
+		if (nullptr == object) {
 			EWOL_CRITICAL("Request resource file : '" << _filename << "' With the wrong type (dynamic cast error)");
-			return NULL;
+			return nullptr;
 		}
 	}
-	if (NULL != object) {
+	if (nullptr != object) {
 		return object;
 	}
 	// need to crate a new one ...
 	object = new ewol::resource::Program(_filename);
-	if (NULL == object) {
+	if (nullptr == object) {
 		EWOL_ERROR("allocation error of a resource : " << _filename);
-		return NULL;
+		return nullptr;
 	}
 	getManager().localAdd(object);
 	return object;
@@ -801,10 +801,10 @@ ewol::resource::Program* ewol::resource::Program::keep(const std::string& _filen
 
 
 void ewol::resource::Program::release(ewol::resource::Program*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		return;
 	}
 	ewol::Resource* object2 = static_cast<ewol::Resource*>(_object);
 	getManager().release(object2);
-	_object = NULL;
+	_object = nullptr;
 }
\ No newline at end of file
diff --git a/sources/ewol/resource/Program.h b/sources/ewol/resource/Program.h
index a17595c4..7dc272d3 100644
--- a/sources/ewol/resource/Program.h
+++ b/sources/ewol/resource/Program.h
@@ -297,7 +297,7 @@ namespace ewol {
 				 * @brief keep the resource pointer.
 				 * @note Never free this pointer by your own...
 				 * @param[in] _filename Name of the openGL program.
-				 * @return pointer on the resource or NULL if an error occured.
+				 * @return pointer on the resource or nullptr if an error occured.
 				 */
 				static ewol::resource::Program* keep(const std::string& _filename);
 				/**
diff --git a/sources/ewol/resource/Shader.cpp b/sources/ewol/resource/Shader.cpp
index 29629af2..76307607 100644
--- a/sources/ewol/resource/Shader.cpp
+++ b/sources/ewol/resource/Shader.cpp
@@ -18,7 +18,7 @@
 ewol::resource::Shader::Shader(const std::string& _filename) :
   ewol::Resource(_filename),
   m_exist(false),
-  m_fileData(NULL),
+  m_fileData(nullptr),
   m_shader(0),
   m_type(0) {
 	addObjectType("ewol::Shader");
@@ -38,9 +38,9 @@ ewol::resource::Shader::Shader(const std::string& _filename) :
 }
 
 ewol::resource::Shader::~Shader() {
-	if (NULL != m_fileData) {
+	if (nullptr != m_fileData) {
 		delete [] m_fileData;
-		m_fileData = NULL;
+		m_fileData = nullptr;
 	}
 	if (0!=m_shader) {
 		glDeleteShader(m_shader);
@@ -62,7 +62,7 @@ void ewol::resource::Shader::updateContext() {
 		// Do nothing  == > too dangerous ...
 	} else {
 		// create the Shader
-		if (NULL == m_fileData) {
+		if (nullptr == m_fileData) {
 			m_shader = 0;
 			return;
 		}
@@ -73,7 +73,7 @@ void ewol::resource::Shader::updateContext() {
 			return;
 		} else {
 			//EWOL_INFO("Creater shader with GLID=" << m_shader);
-			glShaderSource(m_shader, 1, (const char**)&m_fileData, NULL);
+			glShaderSource(m_shader, 1, (const char**)&m_fileData, nullptr);
 			glCompileShader(m_shader);
 			GLint compiled = 0;
 			glGetShaderiv(m_shader, GL_COMPILE_STATUS, &compiled);
@@ -128,13 +128,13 @@ void ewol::resource::Shader::reload() {
 		return;
 	}
 	// remove previous data ...
-	if (NULL != m_fileData) {
+	if (nullptr != m_fileData) {
 		delete[] m_fileData;
 		m_fileData = 0;
 	}
 	// allocate data
 	m_fileData = new char[fileSize+5];
-	if (NULL == m_fileData) {
+	if (nullptr == m_fileData) {
 		EWOL_ERROR("Error Memory allocation size=" << fileSize);
 		return;
 	}
@@ -151,33 +151,33 @@ void ewol::resource::Shader::reload() {
 
 ewol::resource::Shader* ewol::resource::Shader::keep(const std::string& _filename) {
 	EWOL_VERBOSE("KEEP : Simpleshader : file : \"" << _filename << "\"");
-	ewol::resource::Shader* object = NULL;
+	ewol::resource::Shader* object = nullptr;
 	ewol::Resource* object2 = getManager().localKeep(_filename);
-	if (NULL != object2) {
+	if (nullptr != object2) {
 		object = dynamic_cast<ewol::resource::Shader*>(object2);
-		if (NULL == object) {
+		if (nullptr == object) {
 			EWOL_CRITICAL("Request resource file : '" << _filename << "' With the wrong type (dynamic cast error)");
-			return NULL;
+			return nullptr;
 		}
 	}
-	if (NULL != object) {
+	if (nullptr != object) {
 		return object;
 	}
 	// need to crate a new one ...
 	object = new ewol::resource::Shader(_filename);
-	if (NULL == object) {
+	if (nullptr == object) {
 		EWOL_ERROR("allocation error of a resource : " << _filename);
-		return NULL;
+		return nullptr;
 	}
 	getManager().localAdd(object);
 	return object;
 }
 
 void ewol::resource::Shader::release(ewol::resource::Shader*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		return;
 	}
 	ewol::Resource* object2 = static_cast<ewol::Resource*>(_object);
 	getManager().release(object2);
-	_object = NULL;
+	_object = nullptr;
 }
diff --git a/sources/ewol/resource/Shader.h b/sources/ewol/resource/Shader.h
index c24bd55e..077079a3 100644
--- a/sources/ewol/resource/Shader.h
+++ b/sources/ewol/resource/Shader.h
@@ -72,7 +72,7 @@ namespace ewol {
 				 * @brief keep the resource pointer.
 				 * @note Never free this pointer by your own...
 				 * @param[in] _filename Name of the openGL Shader.
-				 * @return pointer on the resource or NULL if an error occured.
+				 * @return pointer on the resource or nullptr if an error occured.
 				 */
 				static ewol::resource::Shader* keep(const std::string& _filename);
 				/**
diff --git a/sources/ewol/resource/Texture.cpp b/sources/ewol/resource/Texture.cpp
index 250e2be9..b633dce3 100644
--- a/sources/ewol/resource/Texture.cpp
+++ b/sources/ewol/resource/Texture.cpp
@@ -110,19 +110,19 @@ void ewol::resource::Texture::setImageSize(ivec2 _newSize) {
 ewol::resource::Texture* ewol::resource::Texture::keep() {
 	// this element create a new one every time ....
 	ewol::resource::Texture* object = new ewol::resource::Texture();
-	if (NULL == object) {
+	if (nullptr == object) {
 		EWOL_ERROR("allocation error of a resource : ??TEX??");
-		return NULL;
+		return nullptr;
 	}
 	getManager().localAdd(object);
 	return object;
 }
 
 void ewol::resource::Texture::release(ewol::resource::Texture*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		return;
 	}
 	ewol::Resource* object2 = static_cast<ewol::Resource*>(_object);
 	getManager().release(object2);
-	_object = NULL;
+	_object = nullptr;
 }
diff --git a/sources/ewol/resource/Texture.h b/sources/ewol/resource/Texture.h
index ac13ca95..6604c218 100644
--- a/sources/ewol/resource/Texture.h
+++ b/sources/ewol/resource/Texture.h
@@ -61,7 +61,7 @@ namespace ewol {
 				/**
 				 * @brief keep the resource pointer.
 				 * @note Never free this pointer by your own...
-				 * @return pointer on the resource or NULL if an error occured.
+				 * @return pointer on the resource or nullptr if an error occured.
 				 */
 				static ewol::resource::Texture* keep();
 				/**
diff --git a/sources/ewol/resource/TexturedFont.cpp b/sources/ewol/resource/TexturedFont.cpp
index 8db88e88..70a97aa2 100644
--- a/sources/ewol/resource/TexturedFont.cpp
+++ b/sources/ewol/resource/TexturedFont.cpp
@@ -47,10 +47,10 @@ ewol::resource::TexturedFont::TexturedFont(const std::string& _fontName) :
 	addObjectType("ewol::resource::TexturedFont");
 	EWOL_DEBUG("Load font : '" << _fontName << "'" );
 
-	m_font[0] = NULL;
-	m_font[1] = NULL;
-	m_font[2] = NULL;
-	m_font[3] = NULL;
+	m_font[0] = nullptr;
+	m_font[1] = nullptr;
+	m_font[2] = nullptr;
+	m_font[3] = nullptr;
 	
 	m_modeWraping[0] = ewol::font::Regular;
 	m_modeWraping[1] = ewol::font::Regular;
@@ -72,7 +72,7 @@ ewol::resource::TexturedFont::TexturedFont(const std::string& _fontName) :
 	const char * tmpData = _fontName.c_str();
 	const char * tmpPos = strchr(tmpData, ':');
 	
-	if (tmpPos == NULL) {
+	if (tmpPos == nullptr) {
 		m_size = 1;
 		EWOL_CRITICAL("Can not parse the font name : \"" << _fontName << "\" ??? ':' " );
 		return;
@@ -188,19 +188,19 @@ ewol::resource::TexturedFont::TexturedFont(const std::string& _fontName) :
 	for (int32_t iiiFontId=0; iiiFontId<4 ; iiiFontId++) {
 		if (m_fileName[iiiFontId].size() == 0) {
 			EWOL_DEBUG("can not load FONT [" << iiiFontId << "] name : \"" << m_fileName[iiiFontId] << "\"  == > size=" << m_size );
-			m_font[iiiFontId] = NULL;
+			m_font[iiiFontId] = nullptr;
 			continue;
 		}
 		EWOL_INFO("Load FONT [" << iiiFontId << "] name : \"" << m_fileName[iiiFontId] << "\"  == > size=" << m_size);
 		m_font[iiiFontId] = ewol::resource::FontFreeType::keep(m_fileName[iiiFontId]);
-		if (m_font[iiiFontId] == NULL) {
+		if (m_font[iiiFontId] == nullptr) {
 			EWOL_DEBUG("error in loading FONT [" << iiiFontId << "] name : \"" << m_fileName[iiiFontId] << "\"  == > size=" << m_size );
 		}
 	}
 	for (int32_t iiiFontId=0; iiiFontId<4 ; iiiFontId++) {
 		// set the bassic charset:
 		m_listElement[iiiFontId].clear();
-		if (m_font[iiiFontId] == NULL) {
+		if (m_font[iiiFontId] == nullptr) {
 			continue;
 		}
 		m_height[iiiFontId] = m_font[iiiFontId]->getHeight(m_size);
@@ -234,7 +234,7 @@ bool ewol::resource::TexturedFont::addGlyph(const char32_t& _val) {
 	bool hasChange = false;
 	// for each font :
 	for (int32_t iii=0; iii<4 ; iii++) {
-		if (m_font[iii] == NULL) {
+		if (m_font[iii] == nullptr) {
 			continue;
 		}
 		// add the curent "char"
@@ -333,7 +333,7 @@ ewol::GlyphProperty* ewol::resource::TexturedFont::getGlyphPointer(const char32_
 		if (m_listElement[_displayMode].size() > 0) {
 			return &((m_listElement[_displayMode])[0]);
 		}
-		return NULL;
+		return nullptr;
 	}
 	//EWOL_ERROR("      index=" << index);
 	//EWOL_ERROR("      m_UVal=" << m_listElement[_displayMode][index].m_UVal);
@@ -345,31 +345,31 @@ ewol::GlyphProperty* ewol::resource::TexturedFont::getGlyphPointer(const char32_
 
 ewol::resource::TexturedFont* ewol::resource::TexturedFont::keep(const std::string& _filename) {
 	EWOL_VERBOSE("KEEP : TexturedFont : file : '" << _filename << "'");
-	ewol::resource::TexturedFont* object = NULL;
+	ewol::resource::TexturedFont* object = nullptr;
 	ewol::Resource* object2 = getManager().localKeep(_filename);
-	if (NULL != object2) {
+	if (nullptr != object2) {
 		object = dynamic_cast<ewol::resource::TexturedFont*>(object2);
-		if (NULL == object) {
+		if (nullptr == object) {
 			EWOL_CRITICAL("Request resource file : '" << _filename << "' With the wrong type (dynamic cast error)");
-			return NULL;
+			return nullptr;
 		}
 	}
-	if (NULL != object) {
+	if (nullptr != object) {
 		return object;
 	}
 	// need to crate a new one ...
 	EWOL_INFO("CREATE: TexturedFont : file : '" << _filename << "'");
 	object = new ewol::resource::TexturedFont(_filename);
-	if (NULL == object) {
+	if (nullptr == object) {
 		EWOL_ERROR("allocation error of a resource : " << _filename);
-		return NULL;
+		return nullptr;
 	}
 	getManager().localAdd(object);
 	return object;
 }
 
 void ewol::resource::TexturedFont::release(ewol::resource::TexturedFont*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		return;
 	}
 	EWOL_VERBOSE("RELEASE: TexturedFont : file : '" << _object->getName() << "' count=" << _object->getCounter());
@@ -380,5 +380,5 @@ void ewol::resource::TexturedFont::release(ewol::resource::TexturedFont*& _objec
 		EWOL_ERROR("REMOVE: TexturedFont : file : '" << name << "' count=" << count);
 		//etk::displayBacktrace(false);
 	}
-	_object = NULL;
+	_object = nullptr;
 }
diff --git a/sources/ewol/resource/TexturedFont.h b/sources/ewol/resource/TexturedFont.h
index a9c7d994..38172085 100644
--- a/sources/ewol/resource/TexturedFont.h
+++ b/sources/ewol/resource/TexturedFont.h
@@ -74,7 +74,7 @@ namespace ewol {
 				 * @brief get the pointer on the coresponding glyph
 				 * @param[in] _charcode The unicodeValue
 				 * @param[in] _displayMode Mode to display the currrent font
-				 * @return The pointer on the glyph  == > never NULL
+				 * @return The pointer on the glyph  == > never nullptr
 				 */
 				ewol::GlyphProperty* getGlyphPointer(const char32_t& _charcode, const enum ewol::font::mode _displayMode);
 				/**
@@ -91,7 +91,7 @@ namespace ewol {
 				 * @brief keep the resource pointer.
 				 * @note Never free this pointer by your own...
 				 * @param[in] _filename Name of the texture font.
-				 * @return pointer on the resource or NULL if an error occured.
+				 * @return pointer on the resource or nullptr if an error occured.
 				 */
 				static ewol::resource::TexturedFont* keep(const std::string& _filename);
 				/**
diff --git a/sources/ewol/resource/VirtualBufferObject.cpp b/sources/ewol/resource/VirtualBufferObject.cpp
index e83550f4..d57102a1 100644
--- a/sources/ewol/resource/VirtualBufferObject.cpp
+++ b/sources/ewol/resource/VirtualBufferObject.cpp
@@ -126,19 +126,19 @@ int32_t ewol::resource::VirtualBufferObject::sizeOnBufferVec2(int32_t _id) {
 ewol::resource::VirtualBufferObject* ewol::resource::VirtualBufferObject::keep(int32_t _number) {
 	// this element create a new one every time ....
 	ewol::resource::VirtualBufferObject* object = new ewol::resource::VirtualBufferObject(_number);
-	if (NULL == object) {
+	if (nullptr == object) {
 		EWOL_ERROR("allocation error of a resource : ??VBO??");
-		return NULL;
+		return nullptr;
 	}
 	getManager().localAdd(object);
 	return object;
 }
 
 void ewol::resource::VirtualBufferObject::release(ewol::resource::VirtualBufferObject*& _object) {
-	if (NULL == _object) {
+	if (nullptr == _object) {
 		return;
 	}
 	ewol::Resource* object2 = static_cast<ewol::Resource*>(_object);
 	getManager().release(object2);
-	_object = NULL;
+	_object = nullptr;
 }
diff --git a/sources/ewol/resource/VirtualBufferObject.h b/sources/ewol/resource/VirtualBufferObject.h
index 6da6e5cc..bb4fb827 100644
--- a/sources/ewol/resource/VirtualBufferObject.h
+++ b/sources/ewol/resource/VirtualBufferObject.h
@@ -97,7 +97,7 @@ namespace ewol {
 				 * @brief keep the resource pointer.
 				 * @note Never free this pointer by your own...
 				 * @param[in] _number Number of VBO needed
-				 * @return pointer on the resource or NULL if an error occured.
+				 * @return pointer on the resource or nullptr if an error occured.
 				 */
 				static ewol::resource::VirtualBufferObject* keep(int32_t _number);
 				/**
diff --git a/sources/ewol/translate.cpp b/sources/ewol/translate.cpp
index 5ca2147e..38885e83 100644
--- a/sources/ewol/translate.cpp
+++ b/sources/ewol/translate.cpp
@@ -212,7 +212,7 @@ void ewol::translate::autoDetectLanguage() {
 	EWOL_INFO("Auto-detect language of system");
 	#if defined(__TARGET_OS__Linux)
 		char *s = getenv("LANG");
-		if (s == NULL || strlen(s) < 2) {
+		if (s == nullptr || strlen(s) < 2) {
 			EWOL_INFO("Try to determine system language FAIL ...");
 		} else {
 			std::string lang;
diff --git a/sources/ewol/widget/Button.cpp b/sources/ewol/widget/Button.cpp
index 3679958c..a1f96774 100644
--- a/sources/ewol/widget/Button.cpp
+++ b/sources/ewol/widget/Button.cpp
@@ -60,10 +60,10 @@ ewol::widget::Button::Button(const std::string& _shaperName) :
 	addEventId(eventLeave);
 	addEventId(eventValue);
 	// add configuration
-	registerConfig(configToggle, "bool", NULL, "The Button can toogle");
-	registerConfig(configValue, "bool", NULL, "Basic value of the widget");
+	registerConfig(configToggle, "bool", nullptr, "The Button can toogle");
+	registerConfig(configValue, "bool", nullptr, "Basic value of the widget");
 	registerConfig(configLock, "list", "none;true;released;pressed", "Lock the button in a special state to permit changing state only by the coder");
-	registerConfig(configShaper, "string", NULL, "the display name for config file");
+	registerConfig(configShaper, "string", nullptr, "the display name for config file");
 	
 	// shaper satatus update:
 	CheckStatus();
diff --git a/sources/ewol/widget/ButtonColor.cpp b/sources/ewol/widget/ButtonColor.cpp
index 261542e5..8570dbf4 100644
--- a/sources/ewol/widget/ButtonColor.cpp
+++ b/sources/ewol/widget/ButtonColor.cpp
@@ -41,7 +41,7 @@ void ewol::widget::ButtonColor::init(ewol::widget::Manager& _widgetManager) {
 ewol::widget::ButtonColor::ButtonColor(etk::Color<> _baseColor, std::string _shaperName) :
   m_shaper(_shaperName),
   m_textColorFg(_baseColor),
-  m_widgetContextMenu(NULL) {
+  m_widgetContextMenu(nullptr) {
 	addObjectType("ewol::widget::ButtonColor");
 	addEventId(eventChange);
 	changeStatusIn(STATUS_UP);
@@ -177,7 +177,7 @@ bool ewol::widget::ButtonColor::onEventInput(const ewol::event::Input& _event) {
 				m_mouseHover = false;
 				// create a context menu : 
 				m_widgetContextMenu = new ewol::widget::ContextMenu();
-				if (NULL == m_widgetContextMenu) {
+				if (nullptr == m_widgetContextMenu) {
 					EWOL_ERROR("Allocation Error");
 					return true;
 				}
diff --git a/sources/ewol/widget/CheckBox.cpp b/sources/ewol/widget/CheckBox.cpp
index 90a7565a..7ecab819 100644
--- a/sources/ewol/widget/CheckBox.cpp
+++ b/sources/ewol/widget/CheckBox.cpp
@@ -52,8 +52,8 @@ ewol::widget::CheckBox::CheckBox(const std::string& _shaperName) :
 	addEventId(eventEnter);
 	addEventId(eventValue);
 	// add configuration
-	registerConfig(configValue, "bool", NULL, "Basic value of the widget");
-	registerConfig(configShaper, "string", NULL, "the display name for config file");
+	registerConfig(configValue, "bool", nullptr, "Basic value of the widget");
+	registerConfig(configShaper, "string", nullptr, "the display name for config file");
 	
 	m_shaperIdSize = m_shaper.requestConfig("box-size");
 	m_shaperIdSizeInsize = m_shaper.requestConfig("box-inside");
diff --git a/sources/ewol/widget/Composer.cpp b/sources/ewol/widget/Composer.cpp
index 94e842c6..caffaf64 100644
--- a/sources/ewol/widget/Composer.cpp
+++ b/sources/ewol/widget/Composer.cpp
@@ -45,10 +45,10 @@ bool ewol::widget::Composer::loadFromFile(const std::string& _fileName) {
 		return false;
 	}
 	exml::Element* root = (exml::Element*)doc.getNamed("composer");
-	if (NULL == root ) {
+	if (nullptr == root ) {
 		// Maybe a multiple node XML for internal config:
 		root = doc.toElement();
-		if (NULL == root ) {
+		if (nullptr == root ) {
 			EWOL_ERROR("[" << getId() << "] {" << getObjectType() << "} (l ?) main node not find: \"composer\" ...");
 			return false;
 		}
@@ -70,10 +70,10 @@ bool ewol::widget::Composer::loadFromString(const std::string& _composerXmlStrin
 		return false;
 	}
 	exml::Element* root = (exml::Element*)doc.getNamed("composer");
-	if (NULL == root ) {
+	if (nullptr == root ) {
 		// Maybe a multiple node XML for internal config:
 		root = doc.toElement();
-		if (NULL == root ) {
+		if (nullptr == root ) {
 			EWOL_ERROR("[" << getId() << "] {" << getObjectType() << "} (l ?) main node not find: \"composer\" ...");
 			return false;
 		}
@@ -102,7 +102,7 @@ void ewol::widget::Composer::registerOnEventNameWidget(ewol::object::Shared<ewol
                                                        const char * _eventIdgenerated,
                                                        const std::string& _overloadData) {
 	ewol::object::Shared<ewol::Widget> tmpWidget = getWidgetNamed(_subWidgetName);
-	if (NULL != tmpWidget) {
+	if (nullptr != tmpWidget) {
 		EWOL_DEBUG("Find widget named : \"" << _subWidgetName << "\" register event=\"" << _eventId << "\"");
 		tmpWidget->registerOnEvent(_destinationObject, _eventId, _eventIdgenerated, _overloadData);
 	} else {
diff --git a/sources/ewol/widget/Composer.h b/sources/ewol/widget/Composer.h
index 93462924..44736bd3 100644
--- a/sources/ewol/widget/Composer.h
+++ b/sources/ewol/widget/Composer.h
@@ -66,7 +66,7 @@ namespace ewol {
 				 */
 				void registerOnEventNameWidget(const std::string& _subWidgetName,
 				                               const char * _eventId,
-				                               const char * _eventIdgenerated = NULL,
+				                               const char * _eventIdgenerated = nullptr,
 				                               const std::string& _overloadData="");
 			public:
 				/**
@@ -81,7 +81,7 @@ namespace ewol {
 				void registerOnEventNameWidget(ewol::object::Shared<ewol::Object> _destinationObject,
 				                               const std::string& _subWidgetName,
 				                               const char * _eventId,
-				                               const char * _eventIdgenerated = NULL,
+				                               const char * _eventIdgenerated = nullptr,
 				                               const std::string& _overloadData="");
 		};
 	};
diff --git a/sources/ewol/widget/Container.cpp b/sources/ewol/widget/Container.cpp
index 83fa7a19..22ec6f07 100644
--- a/sources/ewol/widget/Container.cpp
+++ b/sources/ewol/widget/Container.cpp
@@ -31,12 +31,12 @@ ewol::object::Shared<ewol::Widget> ewol::widget::Container::getSubWidget() {
 }
 
 void ewol::widget::Container::setSubWidget(ewol::object::Shared<ewol::Widget> _newWidget) {
-	if (NULL == _newWidget) {
+	if (nullptr == _newWidget) {
 		return;
 	}
 	subWidgetRemove();
 	m_subWidget = _newWidget;
-	if (m_subWidget!=NULL) {
+	if (m_subWidget!=nullptr) {
 		m_subWidget->setUpperWidget(this);
 	}
 	markToRedraw();
@@ -44,36 +44,36 @@ void ewol::widget::Container::setSubWidget(ewol::object::Shared<ewol::Widget> _n
 }
 
 void ewol::widget::Container::subWidgetRemove() {
-	if (NULL != m_subWidget) {
+	if (nullptr != m_subWidget) {
 		m_subWidget->removeUpperWidget();
 		m_subWidget->removeObject();
-		m_subWidget=NULL;
+		m_subWidget=nullptr;
 		markToRedraw();
 		requestUpdateSize();
 	}
 }
 
 void ewol::widget::Container::subWidgetUnLink() {
-	if (NULL != m_subWidget) {
+	if (nullptr != m_subWidget) {
 		m_subWidget->removeUpperWidget();
 	}
-	m_subWidget=NULL;
+	m_subWidget=nullptr;
 }
 
 ewol::object::Shared<ewol::Widget> ewol::widget::Container::getWidgetNamed(const std::string& _widgetName) {
 	ewol::object::Shared<ewol::Widget> tmpUpperWidget = ewol::Widget::getWidgetNamed(_widgetName);
-	if (NULL!=tmpUpperWidget) {
+	if (nullptr!=tmpUpperWidget) {
 		return tmpUpperWidget;
 	}
-	if (NULL != m_subWidget) {
+	if (nullptr != m_subWidget) {
 		return m_subWidget->getWidgetNamed(_widgetName);
 	}
-	return NULL;
+	return nullptr;
 }
 
 void ewol::widget::Container::onObjectRemove(ewol::object::Shared<ewol::Object> _removeObject) {
 	if (m_subWidget == _removeObject) {
-		m_subWidget=NULL;
+		m_subWidget=nullptr;
 		markToRedraw();
 		requestUpdateSize();
 	}
@@ -85,7 +85,7 @@ void ewol::widget::Container::systemDraw(const ewol::DrawProperty& _displayProp)
 		return;
 	}
 	ewol::Widget::systemDraw(_displayProp);
-	if (NULL!=m_subWidget) {
+	if (nullptr!=m_subWidget) {
 		ewol::DrawProperty prop = _displayProp;
 		prop.limit(m_origin, m_size);
 		m_subWidget->systemDraw(prop);
@@ -93,7 +93,7 @@ void ewol::widget::Container::systemDraw(const ewol::DrawProperty& _displayProp)
 }
 
 void ewol::widget::Container::calculateSize(const vec2& _availlable) {
-	if (NULL!=m_subWidget) {
+	if (nullptr!=m_subWidget) {
 		vec2 origin = m_origin+m_offset;
 		vec2 minSize = m_subWidget->getCalculateMinSize();
 		bvec2 expand = m_subWidget->getExpand();
@@ -123,7 +123,7 @@ void ewol::widget::Container::calculateMinMaxSize() {
 	// call main class
 	ewol::Widget::calculateMinMaxSize();
 	// call sub classes
-	if (NULL!=m_subWidget) {
+	if (nullptr!=m_subWidget) {
 		m_subWidget->calculateMinMaxSize();
 		vec2 min = m_subWidget->getCalculateMinSize();
 		m_minSize.setMax(min);
@@ -132,23 +132,23 @@ void ewol::widget::Container::calculateMinMaxSize() {
 }
 
 void ewol::widget::Container::onRegenerateDisplay() {
-	if (NULL!=m_subWidget) {
+	if (nullptr!=m_subWidget) {
 		m_subWidget->onRegenerateDisplay();
 	}
 }
 
 ewol::object::Shared<ewol::Widget> ewol::widget::Container::getWidgetAtPos(const vec2& _pos) {
 	if (false == isHide()) {
-		if (NULL!=m_subWidget) {
+		if (nullptr!=m_subWidget) {
 			return m_subWidget->getWidgetAtPos(_pos);
 		}
 	}
-	return NULL;
+	return nullptr;
 };
 
 
 bool ewol::widget::Container::loadXML(exml::Element* _node) {
-	if (NULL == _node) {
+	if (nullptr == _node) {
 		return false;
 	}
 	// parse generic properties :
@@ -159,7 +159,7 @@ bool ewol::widget::Container::loadXML(exml::Element* _node) {
 	// parse all the elements :
 	for(size_t iii=0; iii< _node->size(); iii++) {
 		exml::Element* pNode = _node->getElement(iii);
-		if (pNode == NULL) {
+		if (pNode == nullptr) {
 			// trash here all that is not element
 			continue;
 		}
@@ -168,13 +168,13 @@ bool ewol::widget::Container::loadXML(exml::Element* _node) {
 			EWOL_ERROR("(l "<<pNode->getPos()<<") Unknown basic node=\"" << widgetName << "\" not in : [" << getWidgetManager().list() << "]" );
 			continue;
 		}
-		if (NULL != getSubWidget()) {
+		if (nullptr != getSubWidget()) {
 			EWOL_ERROR("(l "<<pNode->getPos()<<") " << __class__ << " Can only have one subWidget ??? node=\"" << widgetName << "\"" );
 			continue;
 		}
 		EWOL_DEBUG("try to create subwidget : '" << widgetName << "'");
 		ewol::object::Shared<ewol::Widget> tmpWidget = getWidgetManager().create(widgetName);
-		if (tmpWidget == NULL) {
+		if (tmpWidget == nullptr) {
 			EWOL_ERROR ("(l "<<pNode->getPos()<<") Can not create the widget : \"" << widgetName << "\"");
 			continue;
 		}
diff --git a/sources/ewol/widget/Container.h b/sources/ewol/widget/Container.h
index efd4880c..0f45b9a8 100644
--- a/sources/ewol/widget/Container.h
+++ b/sources/ewol/widget/Container.h
@@ -26,7 +26,7 @@ namespace ewol {
 				/**
 				 * @brief Constructor
 				 */
-				Container(ewol::object::Shared<ewol::Widget> _subElement=NULL);
+				Container(ewol::object::Shared<ewol::Widget> _subElement=nullptr);
 				/**
 				 * @brief Destructor
 				 */
diff --git a/sources/ewol/widget/Container2.cpp b/sources/ewol/widget/Container2.cpp
index 99922f58..1aeb8981 100644
--- a/sources/ewol/widget/Container2.cpp
+++ b/sources/ewol/widget/Container2.cpp
@@ -32,7 +32,7 @@ ewol::widget::Container2::~Container2() {
 void ewol::widget::Container2::setSubWidget(ewol::object::Shared<ewol::Widget> _newWidget, int32_t _idWidget) {
 	subWidgetRemove(_idWidget);
 	m_subWidget[_idWidget] = _newWidget;
-	if (m_subWidget[_idWidget] != NULL) {
+	if (m_subWidget[_idWidget] != nullptr) {
 		EWOL_VERBOSE("Add widget : " << _idWidget);
 		m_subWidget[_idWidget]->setUpperWidget(this);
 	}
@@ -42,46 +42,46 @@ void ewol::widget::Container2::setSubWidget(ewol::object::Shared<ewol::Widget> _
 
 
 void ewol::widget::Container2::subWidgetRemove(int32_t _idWidget) {
-	if (m_subWidget[_idWidget] != NULL) {
+	if (m_subWidget[_idWidget] != nullptr) {
 		EWOL_VERBOSE("Remove widget : " << _idWidget);
 		m_subWidget[_idWidget]->removeUpperWidget();
 		m_subWidget[_idWidget]->removeObject();
-		m_subWidget[_idWidget] = NULL;
+		m_subWidget[_idWidget] = nullptr;
 		markToRedraw();
 		requestUpdateSize();
 	}
 }
 
 void ewol::widget::Container2::subWidgetUnLink(int32_t _idWidget) {
-	if (m_subWidget[_idWidget] != NULL) {
+	if (m_subWidget[_idWidget] != nullptr) {
 		m_subWidget[_idWidget]->removeUpperWidget();
 		EWOL_VERBOSE("Unlink widget : " << _idWidget);
 	}
-	m_subWidget[_idWidget] = NULL;
+	m_subWidget[_idWidget] = nullptr;
 }
 
 ewol::object::Shared<ewol::Widget> ewol::widget::Container2::getWidgetNamed(const std::string& _widgetName) {
 	ewol::object::Shared<ewol::Widget> tmpUpperWidget = ewol::Widget::getWidgetNamed(_widgetName);
-	if (tmpUpperWidget != NULL) {
+	if (tmpUpperWidget != nullptr) {
 		return tmpUpperWidget;
 	}
-	if (m_subWidget[0] != NULL) {
+	if (m_subWidget[0] != nullptr) {
 		return m_subWidget[0]->getWidgetNamed(_widgetName);
 	}
-	if (m_subWidget[1] != NULL) {
+	if (m_subWidget[1] != nullptr) {
 		return m_subWidget[1]->getWidgetNamed(_widgetName);
 	}
-	return NULL;
+	return nullptr;
 }
 
 void ewol::widget::Container2::onObjectRemove(ewol::object::Shared<ewol::Object> _removeObject) {
 	if (m_subWidget[0] == _removeObject) {
-		m_subWidget[0] = NULL;
+		m_subWidget[0] = nullptr;
 		markToRedraw();
 		requestUpdateSize();
 	}
 	if (m_subWidget[1] == _removeObject) {
-		m_subWidget[1] = NULL;
+		m_subWidget[1] = nullptr;
 		markToRedraw();
 		requestUpdateSize();
 	}
@@ -93,7 +93,7 @@ void ewol::widget::Container2::systemDraw(const ewol::DrawProperty& _displayProp
 		return;
 	}
 	ewol::Widget::systemDraw(_displayProp);
-	if (m_subWidget[m_idWidgetDisplayed] != NULL) {
+	if (m_subWidget[m_idWidgetDisplayed] != nullptr) {
 		m_subWidget[m_idWidgetDisplayed]->systemDraw(_displayProp);
 	}
 }
@@ -119,7 +119,7 @@ ewol::Padding ewol::widget::Container2::calculateSizePadded(const vec2& _availla
 	vec2 origin = (m_size - subElementSize)*0.5f + vec2(_padding.xLeft(), _padding.yButtom());
 	subElementSize -= vec2(_padding.x(), _padding.y());
 	for (size_t iii = 0; iii < 2; ++iii) {
-		if (m_subWidget[iii] != NULL) {
+		if (m_subWidget[iii] != nullptr) {
 			vec2 origin2 = origin+m_offset;
 			vec2 minSize = m_subWidget[iii]->getCalculateMinSize();
 			bvec2 expand = m_subWidget[iii]->getExpand();
@@ -154,7 +154,7 @@ void ewol::widget::Container2::calculateMinMaxSizePadded(const ewol::Padding& _p
 	m_minSize = vec2(0,0);
 	// call sub classes
 	for (size_t iii = 0; iii < 2; ++iii) {
-		if (m_subWidget[iii] != NULL) {
+		if (m_subWidget[iii] != nullptr) {
 			m_subWidget[iii]->calculateMinMaxSize();
 			vec2 min = m_subWidget[iii]->getCalculateMinSize();
 			m_minSize.setMax(min);
@@ -168,23 +168,23 @@ void ewol::widget::Container2::calculateMinMaxSizePadded(const ewol::Padding& _p
 }
 
 void ewol::widget::Container2::onRegenerateDisplay() {
-	if (m_subWidget[m_idWidgetDisplayed] != NULL) {
+	if (m_subWidget[m_idWidgetDisplayed] != nullptr) {
 		m_subWidget[m_idWidgetDisplayed]->onRegenerateDisplay();
 	}
 }
 /*
 ewol::object::Shared<ewol::Widget> ewol::widget::Container2::getWidgetAtPos(const vec2& _pos) {
 	if (isHide() == false) {
-		if (m_subWidget[m_idWidgetDisplayed] != NULL) {
+		if (m_subWidget[m_idWidgetDisplayed] != nullptr) {
 			return m_subWidget[m_idWidgetDisplayed]->getWidgetAtPos(_pos);
 		}
 	}
-	return NULL;
+	return nullptr;
 }
 */
 
 bool ewol::widget::Container2::loadXML(exml::Element* _node) {
-	if (NULL == _node) {
+	if (nullptr == _node) {
 		return false;
 	}
 	// parse generic properties :
@@ -195,7 +195,7 @@ bool ewol::widget::Container2::loadXML(exml::Element* _node) {
 	// parse all the elements :
 	for(size_t iii=0; iii< _node->size(); iii++) {
 		exml::Element* pNode = _node->getElement(iii);
-		if (pNode == NULL) {
+		if (pNode == nullptr) {
 			// trash here all that is not element
 			continue;
 		}
@@ -205,16 +205,16 @@ bool ewol::widget::Container2::loadXML(exml::Element* _node) {
 			continue;
 		}
 		bool toogleMode=false;
-		if (NULL != getSubWidget()) {
+		if (nullptr != getSubWidget()) {
 			toogleMode=true;
-			if (NULL != getSubWidgetToggle()) {
+			if (nullptr != getSubWidgetToggle()) {
 				EWOL_ERROR("(l "<<pNode->getPos()<<") " << __class__ << " Can only have one subWidget ??? node=\"" << widgetName << "\"" );
 				continue;
 			}
 		}
 		EWOL_DEBUG("try to create subwidget : '" << widgetName << "'");
 		ewol::object::Shared<ewol::Widget> tmpWidget = getWidgetManager().create(widgetName);
-		if (tmpWidget == NULL) {
+		if (tmpWidget == nullptr) {
 			EWOL_ERROR ("(l "<<pNode->getPos()<<") Can not create the widget : \"" << widgetName << "\"");
 			continue;
 		}
diff --git a/sources/ewol/widget/Container2.h b/sources/ewol/widget/Container2.h
index 6206f47f..217357e8 100644
--- a/sources/ewol/widget/Container2.h
+++ b/sources/ewol/widget/Container2.h
@@ -144,7 +144,7 @@ namespace ewol {
 				 * @return the id of the widget displayable
 				 */
 				int32_t convertId(int32_t _id) {
-					if (m_subWidget[_id] == NULL) {
+					if (m_subWidget[_id] == nullptr) {
 						return (_id+1)%2;
 					}
 					return _id;
diff --git a/sources/ewol/widget/ContainerN.cpp b/sources/ewol/widget/ContainerN.cpp
index 74ecab6b..62edeede 100644
--- a/sources/ewol/widget/ContainerN.cpp
+++ b/sources/ewol/widget/ContainerN.cpp
@@ -53,11 +53,11 @@ void ewol::widget::ContainerN::lockExpand(const bvec2& _lockExpand) {
 
 
 int32_t ewol::widget::ContainerN::subWidgetAdd(ewol::object::Shared<ewol::Widget> _newWidget) {
-	if (NULL == _newWidget) {
+	if (nullptr == _newWidget) {
 		EWOL_ERROR("[" << getId() << "] {" << getObjectType() << "} Try to add An empty Widget ... ");
 		return -1;
 	}
-	if (_newWidget!=NULL) {
+	if (_newWidget!=nullptr) {
 		_newWidget->setUpperWidget(this);
 	}
 	m_subWidget.push_back(_newWidget);
@@ -68,11 +68,11 @@ int32_t ewol::widget::ContainerN::subWidgetAdd(ewol::object::Shared<ewol::Widget
 }
 
 int32_t ewol::widget::ContainerN::subWidgetAddStart(ewol::object::Shared<ewol::Widget> _newWidget) {
-	if (NULL == _newWidget) {
+	if (nullptr == _newWidget) {
 		EWOL_ERROR("[" << getId() << "] {" << getObjectType() << "} Try to add start An empty Widget ... ");
 		return -1;
 	}
-	if (_newWidget!=NULL) {
+	if (_newWidget!=nullptr) {
 		_newWidget->setUpperWidget(this);
 	}
 	m_subWidget.insert(m_subWidget.begin(), _newWidget);
@@ -82,7 +82,7 @@ int32_t ewol::widget::ContainerN::subWidgetAddStart(ewol::object::Shared<ewol::W
 }
 
 void ewol::widget::ContainerN::subWidgetRemove(ewol::object::Shared<ewol::Widget> _newWidget) {
-	if (NULL == _newWidget) {
+	if (nullptr == _newWidget) {
 		return;
 	}
 	size_t errorControl = m_subWidget.size();
@@ -93,7 +93,7 @@ void ewol::widget::ContainerN::subWidgetRemove(ewol::object::Shared<ewol::Widget
 			// no remove, this element is removed with the function onObjectRemove  == > it does not exist anymore ...
 			if (errorControl == m_subWidget.size()) {
 				EWOL_CRITICAL("[" << getId() << "] {" << getObjectType() << "} The number of element might have been reduced ...  == > it is not the case ==> the herited class must call the \"OnObjectRemove\" function...");
-				m_subWidget[iii] = NULL;
+				m_subWidget[iii] = nullptr;
 				m_subWidget.erase(m_subWidget.begin()+iii);
 			}
 			markToRedraw();
@@ -104,13 +104,13 @@ void ewol::widget::ContainerN::subWidgetRemove(ewol::object::Shared<ewol::Widget
 }
 
 void ewol::widget::ContainerN::subWidgetUnLink(ewol::object::Shared<ewol::Widget> _newWidget) {
-	if (NULL == _newWidget) {
+	if (nullptr == _newWidget) {
 		return;
 	}
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
 		if (_newWidget == m_subWidget[iii]) {
 			m_subWidget[iii]->removeUpperWidget();
-			m_subWidget[iii] = NULL;
+			m_subWidget[iii] = nullptr;
 			m_subWidget.erase(m_subWidget.begin()+iii);
 			markToRedraw();
 			requestUpdateSize();
@@ -123,13 +123,13 @@ void ewol::widget::ContainerN::subWidgetRemoveAll() {
 	size_t errorControl = m_subWidget.size();
 	// the size automaticly decrement with the auto call of the onObjectRemove function
 	while (m_subWidget.size() > 0 ) {
-		if (NULL != m_subWidget[0]) {
+		if (nullptr != m_subWidget[0]) {
 			m_subWidget[0]->removeUpperWidget();
 			m_subWidget[0]->removeObject();
 			// no remove, this element is removed with the function onObjectRemove  == > it does not exist anymore ...
 			if (errorControl == m_subWidget.size()) {
 				EWOL_CRITICAL("[" << getId() << "] {" << getObjectType() << "} The number of element might have been reduced ...  == > it is not the case ==> the herited class must call the \"OnObjectRemove\" function...");
-				m_subWidget[0] = NULL;
+				m_subWidget[0] = nullptr;
 			}
 		} else {
 			EWOL_WARNING("[" << getId() << "] {" << getObjectType() << "} Must not have null pointer on the subWidget list ...");
@@ -143,10 +143,10 @@ void ewol::widget::ContainerN::subWidgetRemoveAll() {
 void ewol::widget::ContainerN::subWidgetRemoveAllDelayed() {
 	// the size automaticly decrement with the auto call of the onObjectRemove function
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii]) {
+		if (nullptr != m_subWidget[iii]) {
 			m_subWidget[iii]->removeUpperWidget();
 			m_subWidget[iii]->removeObject();
-			m_subWidget[iii] = NULL;
+			m_subWidget[iii] = nullptr;
 		} else {
 			EWOL_WARNING("[" << getId() << "] {" << getObjectType() << "} Must not have null pointer on the subWidget list ...");
 		}
@@ -156,18 +156,18 @@ void ewol::widget::ContainerN::subWidgetRemoveAllDelayed() {
 
 ewol::object::Shared<ewol::Widget> ewol::widget::ContainerN::getWidgetNamed(const std::string& _widgetName) {
 	ewol::object::Shared<ewol::Widget> tmpUpperWidget = ewol::Widget::getWidgetNamed(_widgetName);
-	if (NULL!=tmpUpperWidget) {
+	if (nullptr!=tmpUpperWidget) {
 		return tmpUpperWidget;
 	}
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii]) {
+		if (nullptr != m_subWidget[iii]) {
 			ewol::object::Shared<ewol::Widget> tmpWidget = m_subWidget[iii]->getWidgetNamed(_widgetName);
-			if (NULL != tmpWidget) {
+			if (nullptr != tmpWidget) {
 				return tmpWidget;
 			}
 		}
 	}
-	return NULL;
+	return nullptr;
 }
 
 void ewol::widget::ContainerN::onObjectRemove(ewol::object::Shared<ewol::Object> _removeObject) {
@@ -177,7 +177,7 @@ void ewol::widget::ContainerN::onObjectRemove(ewol::object::Shared<ewol::Object>
 	for (int64_t iii=m_subWidget.size()-1; iii >= 0; iii--) {
 		if(m_subWidget[iii] == _removeObject) {
 			EWOL_VERBOSE("[" << getId() << "] {" << getObjectType() << "} remove sizer sub Element [" << iii << "/" << m_subWidget.size()-1 << "]  == > destroyed object");
-			m_subWidget[iii] = NULL;
+			m_subWidget[iii] = nullptr;
 			m_subWidget.erase(m_subWidget.begin()+iii);
 		}
 	}
@@ -194,7 +194,7 @@ void ewol::widget::ContainerN::systemDraw(const ewol::DrawProperty& _displayProp
 	ewol::DrawProperty prop = _displayProp;
 	prop.limit(m_origin, m_size);
 	for (int64_t iii=m_subWidget.size()-1; iii >= 0; iii--) {
-		if (NULL != m_subWidget[iii]) {
+		if (nullptr != m_subWidget[iii]) {
 			m_subWidget[iii]->systemDraw(prop);
 		}
 	}
@@ -203,7 +203,7 @@ void ewol::widget::ContainerN::systemDraw(const ewol::DrawProperty& _displayProp
 void ewol::widget::ContainerN::calculateSize(const vec2& _availlable) {
 	m_size = _availlable;
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii]) {
+		if (nullptr != m_subWidget[iii]) {
 			m_subWidget[iii]->setOrigin(m_origin+m_offset);
 			m_subWidget[iii]->calculateSize(m_size);
 		}
@@ -217,7 +217,7 @@ void ewol::widget::ContainerN::calculateMinMaxSize() {
 	m_maxSize.setValue(ULTIMATE_MAX_SIZE,ULTIMATE_MAX_SIZE);
 	//EWOL_ERROR("[" << getId() << "] {" << getObjectType() << "} set min size : " <<  m_minSize);
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii]) {
+		if (nullptr != m_subWidget[iii]) {
 			m_subWidget[iii]->calculateMinMaxSize();
 			bvec2 subExpendProp = m_subWidget[iii]->canExpand();
 			if (true == subExpendProp.x()) {
@@ -236,7 +236,7 @@ void ewol::widget::ContainerN::calculateMinMaxSize() {
 
 void ewol::widget::ContainerN::onRegenerateDisplay() {
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii]) {
+		if (nullptr != m_subWidget[iii]) {
 			m_subWidget[iii]->onRegenerateDisplay();
 		}
 	}
@@ -244,18 +244,18 @@ void ewol::widget::ContainerN::onRegenerateDisplay() {
 
 ewol::object::Shared<ewol::Widget> ewol::widget::ContainerN::getWidgetAtPos(const vec2& _pos) {
 	if (true == isHide()) {
-		return NULL;
+		return nullptr;
 	}
 	// for all element in the sizer ...
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii]) {
+		if (nullptr != m_subWidget[iii]) {
 			vec2 tmpSize = m_subWidget[iii]->getSize();
 			vec2 tmpOrigin = m_subWidget[iii]->getOrigin();
 			if(    (tmpOrigin.x() <= _pos.x() && tmpOrigin.x() + tmpSize.x() >= _pos.x())
 			    && (tmpOrigin.y() <= _pos.y() && tmpOrigin.y() + tmpSize.y() >= _pos.y()) )
 			{
 				ewol::object::Shared<ewol::Widget> tmpWidget = m_subWidget[iii]->getWidgetAtPos(_pos);
-				if (NULL != tmpWidget) {
+				if (nullptr != tmpWidget) {
 					return tmpWidget;
 				}
 				// stop searching
@@ -263,12 +263,12 @@ ewol::object::Shared<ewol::Widget> ewol::widget::ContainerN::getWidgetAtPos(cons
 			}
 		}
 	}
-	return NULL;
+	return nullptr;
 };
 
 
 bool ewol::widget::ContainerN::loadXML(exml::Element* _node) {
-	if (NULL == _node) {
+	if (nullptr == _node) {
 		return false;
 	}
 	// parse generic properties :
@@ -288,7 +288,7 @@ bool ewol::widget::ContainerN::loadXML(exml::Element* _node) {
 	// parse all the elements :
 	for (size_t iii=0; iii < _node->size(); iii++) {
 		exml::Element* pNode = _node->getElement(iii);
-		if (pNode == NULL) {
+		if (pNode == nullptr) {
 			// trash here all that is not element
 			continue;
 		}
@@ -299,7 +299,7 @@ bool ewol::widget::ContainerN::loadXML(exml::Element* _node) {
 		}
 		EWOL_DEBUG("[" << getId() << "] {" << getObjectType() << "} load new element : \"" << widgetName << "\"");
 		ewol::object::Shared<ewol::Widget> subWidget = getWidgetManager().create(widgetName);
-		if (subWidget == NULL) {
+		if (subWidget == nullptr) {
 			EWOL_ERROR ("[" << getId() << "] {" << getObjectType() << "} (l "<<pNode->getPos()<<") Can not create the widget : \"" << widgetName << "\"");
 			continue;
 		}
diff --git a/sources/ewol/widget/ContextMenu.cpp b/sources/ewol/widget/ContextMenu.cpp
index a4e0ab3b..f5298d24 100644
--- a/sources/ewol/widget/ContextMenu.cpp
+++ b/sources/ewol/widget/ContextMenu.cpp
@@ -35,9 +35,9 @@ ewol::widget::ContextMenu::ContextMenu(const std::string& _shaperName) :
   m_shaper(_shaperName) {
 	addObjectType("ewol::widget::ContextMenu");
 	// add basic configurations :
-	registerConfig(configArrowPosition, "vec2", NULL, "position of the arrow");
+	registerConfig(configArrowPosition, "vec2", nullptr, "position of the arrow");
 	registerConfig(configArrowMode, "list", "none;left;buttom;right;top", "Position of the arrow in the pop-up");
-	registerConfig(configShaper, "string", NULL, "the display name for config file");
+	registerConfig(configShaper, "string", nullptr, "the display name for config file");
 	
 	m_userExpand.setValue(false,false);
 	
@@ -69,7 +69,7 @@ void ewol::widget::ContextMenu::calculateSize(const vec2& _availlable) {
 	m_size = _availlable;
 	ewol::Padding padding = m_shaper.getPadding();
 	EWOL_VERBOSE("our origin=" << m_origin << " size=" << m_size);
-	if (NULL != m_subWidget) {
+	if (nullptr != m_subWidget) {
 		vec2 subWidgetSize;
 		vec2 subWidgetOrigin;
 		subWidgetSize = m_subWidget->getCalculateMinSize();
@@ -158,7 +158,7 @@ void ewol::widget::ContextMenu::onRegenerateDisplay() {
 	m_shaper.clear();
 	ewol::Padding padding = m_shaper.getPadding();
 	
-	if (m_subWidget == NULL) {
+	if (m_subWidget == nullptr) {
 		return;
 	}
 	vec2 tmpSize = m_subWidget->getSize();
@@ -216,7 +216,7 @@ void ewol::widget::ContextMenu::onRegenerateDisplay() {
 
 bool ewol::widget::ContextMenu::onEventInput(const ewol::event::Input& _event) {
 	if (_event.getId() > 0) {
-		if (NULL != ewol::widget::Container::getWidgetAtPos(_event.getPos())) {
+		if (nullptr != ewol::widget::Container::getWidgetAtPos(_event.getPos())) {
 			return false;
 		}
 		if(    _event.getStatus() == ewol::key::statusDown
@@ -243,7 +243,7 @@ void ewol::widget::ContextMenu::setPositionMark(enum markPosition _position, vec
 
 ewol::object::Shared<ewol::Widget> ewol::widget::ContextMenu::getWidgetAtPos(const vec2& _pos) {
 	ewol::object::Shared<ewol::Widget> val = ewol::widget::Container::getWidgetAtPos(_pos);
-	if (NULL != val) {
+	if (nullptr != val) {
 		return val;
 	}
 	return this;
diff --git a/sources/ewol/widget/Entry.cpp b/sources/ewol/widget/Entry.cpp
index 958fb6b0..f2373a27 100644
--- a/sources/ewol/widget/Entry.cpp
+++ b/sources/ewol/widget/Entry.cpp
@@ -73,10 +73,10 @@ ewol::widget::Entry::Entry(std::string _newData) :
 	shortCutAdd("ctrl+a", ewolEventEntrySelect, "ALL");
 	shortCutAdd("ctrl+shift+a", ewolEventEntrySelect, "NONE");
 	
-	registerConfig(configMaxChar, "int", NULL, "Maximum cgar that can be set on the Entry");
-	registerConfig(configRegExp, "string", NULL, "Control what it is write with a regular expression");
-	registerConfig(configEmptyMessage, "string", NULL, "Text that is displayed when the Entry is empty (decorated text)");
-	registerConfig(configValue, "string", NULL, "Value display in the entry (decorated text)");
+	registerConfig(configMaxChar, "int", nullptr, "Maximum cgar that can be set on the Entry");
+	registerConfig(configRegExp, "string", nullptr, "Control what it is write with a regular expression");
+	registerConfig(configEmptyMessage, "string", nullptr, "Text that is displayed when the Entry is empty (decorated text)");
+	registerConfig(configValue, "string", nullptr, "Value display in the entry (decorated text)");
 	
 	setValue(_newData);
 	markToRedraw();
diff --git a/sources/ewol/widget/Gird.cpp b/sources/ewol/widget/Gird.cpp
index 0e019134..55f7079d 100644
--- a/sources/ewol/widget/Gird.cpp
+++ b/sources/ewol/widget/Gird.cpp
@@ -26,7 +26,7 @@ void ewol::widget::Gird::init(ewol::widget::Manager& _widgetManager) {
 
 ewol::widget::Gird::Gird(int32_t _colNumber) :
   m_sizeRow(0),
-  m_tmpWidget(NULL),
+  m_tmpWidget(nullptr),
   m_gavityButtom(true),
   m_borderSize(0,0) {
 	addObjectType("ewol::widget::Gird");
@@ -59,7 +59,7 @@ void ewol::widget::Gird::calculateSize(const vec2& _availlable) {
 	m_size -= m_borderSize*2;
 	
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii].widget) {
+		if (nullptr != m_subWidget[iii].widget) {
 			//calculate the origin :
 			vec2 tmpOrigin = m_origin + m_borderSize;
 			if (false == m_gavityButtom) {
@@ -108,7 +108,7 @@ void ewol::widget::Gird::calculateMinMaxSize() {
 			// change of line : 
 			lastLineID = m_subWidget[iii].row;
 		}
-		if (NULL != m_subWidget[iii].widget) {
+		if (nullptr != m_subWidget[iii].widget) {
 			m_subWidget[iii].widget->calculateMinMaxSize();
 			vec2 tmpSize = m_subWidget[iii].widget->getCalculateMinSize();
 			EWOL_DEBUG("     [" << iii << "] subWidgetMinSize=" << tmpSize);
@@ -144,7 +144,7 @@ void ewol::widget::Gird::setColNumber(int32_t _colNumber) {
 		for (int64_t iii=m_subWidget.size(); iii >= 0; iii--) {
 			if (m_subWidget[iii].col>(_colNumber-1)) {
 				// out of bounds : must remove it ...
-				if (m_subWidget[iii].widget != NULL) {
+				if (m_subWidget[iii].widget != nullptr) {
 					m_subWidget[iii].widget.reset();
 					// no remove, this element is removed with the function onObjectRemove  == > it does not exist anymore ...
 					if (errorControl == m_subWidget.size()) {
@@ -200,7 +200,7 @@ void ewol::widget::Gird::subWidgetRemoveAll() {
 	size_t errorControl = m_subWidget.size();
 	// the size automaticly decrement with the auto call of the onObjectRemove function
 	while (m_subWidget.size() > 0 ) {
-		if (NULL != m_subWidget[0].widget) {
+		if (nullptr != m_subWidget[0].widget) {
 			m_subWidget[0].widget.reset();
 			// no remove, this element is removed with the function onObjectRemove  == > it does not exist anymore ...
 			if (errorControl == m_subWidget.size()) {
@@ -217,7 +217,7 @@ void ewol::widget::Gird::subWidgetRemoveAll() {
 
 
 void ewol::widget::Gird::subWidgetAdd(int32_t _colId, int32_t _rowId, ewol::object::Shared<ewol::Widget> _newWidget) {
-	if (NULL == _newWidget) {
+	if (nullptr == _newWidget) {
 		return;
 	}
 	GirdProperties prop;
@@ -244,11 +244,11 @@ void ewol::widget::Gird::subWidgetAdd(int32_t _colId, int32_t _rowId, ewol::obje
 				// The element already exist  == > replace it ...
 				m_tmpWidget = m_subWidget[iii].widget;
 				m_subWidget[iii].widget = _newWidget;
-				if (NULL != m_tmpWidget) {
+				if (nullptr != m_tmpWidget) {
 					m_tmpWidget.reset();
-					if (m_tmpWidget != NULL) {
+					if (m_tmpWidget != nullptr) {
 						EWOL_CRITICAL("[" << getId() << "] Error while replacing a widget ...  == > never call when free");
-						m_tmpWidget = NULL;
+						m_tmpWidget = nullptr;
 					}
 				}
 			}
@@ -286,7 +286,7 @@ void ewol::widget::Gird::subWidgetRemove(int32_t _colId, int32_t _rowId) {
 }
 
 void ewol::widget::Gird::subWidgetUnLink(ewol::object::Shared<ewol::Widget> _newWidget) {
-	if (NULL == _newWidget) {
+	if (nullptr == _newWidget) {
 		return;
 	}
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
@@ -316,7 +316,7 @@ void ewol::widget::Gird::subWidgetUnLink(int32_t _colId, int32_t _rowId) {
 void ewol::widget::Gird::systemDraw(const ewol::DrawProperty& _displayProp) {
 	ewol::Widget::systemDraw(_displayProp);
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii].widget) {
+		if (nullptr != m_subWidget[iii].widget) {
 			m_subWidget[iii].widget->systemDraw(_displayProp);
 		}
 	}
@@ -324,7 +324,7 @@ void ewol::widget::Gird::systemDraw(const ewol::DrawProperty& _displayProp) {
 
 void ewol::widget::Gird::onRegenerateDisplay() {
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii].widget) {
+		if (nullptr != m_subWidget[iii].widget) {
 			m_subWidget[iii].widget->onRegenerateDisplay();
 		}
 	}
@@ -332,18 +332,18 @@ void ewol::widget::Gird::onRegenerateDisplay() {
 
 ewol::object::Shared<ewol::Widget> ewol::widget::Gird::getWidgetAtPos(const vec2& _pos) {
 	if (true == isHide()) {
-		return NULL;
+		return nullptr;
 	}
 	// for all element in the sizer ...
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii].widget) {
+		if (nullptr != m_subWidget[iii].widget) {
 			vec2 tmpSize = m_subWidget[iii].widget->getSize();
 			vec2 tmpOrigin = m_subWidget[iii].widget->getOrigin();
 			if(    (tmpOrigin.x() <= _pos.x() && tmpOrigin.x() + tmpSize.x() >= _pos.x())
 			    && (tmpOrigin.y() <= _pos.y() && tmpOrigin.y() + tmpSize.y() >= _pos.y()) )
 			{
 				ewol::object::Shared<ewol::Widget> tmpWidget = m_subWidget[iii].widget->getWidgetAtPos(_pos);
-				if (NULL != tmpWidget) {
+				if (nullptr != tmpWidget) {
 					return tmpWidget;
 				}
 				// stop searching
@@ -351,7 +351,7 @@ ewol::object::Shared<ewol::Widget> ewol::widget::Gird::getWidgetAtPos(const vec2
 			}
 		}
 	}
-	return NULL;
+	return nullptr;
 }
 
 void ewol::widget::Gird::onObjectRemove(ewol::object::Shared<ewol::Object> _removeObject) {
@@ -361,11 +361,11 @@ void ewol::widget::Gird::onObjectRemove(ewol::object::Shared<ewol::Object> _remo
 	for(int32_t iii=m_subWidget.size()-1; iii >= 0; iii--) {
 		if(m_subWidget[iii].widget == _removeObject) {
 			EWOL_VERBOSE("[" << getId() << "]={" << getObjectType() << "} remove sizer sub Element [" << iii << "/" << m_subWidget.size()-1 << "]  == > destroyed object");
-			m_subWidget[iii].widget = NULL;
+			m_subWidget[iii].widget = nullptr;
 			m_subWidget.erase(m_subWidget.begin()+iii);
 		}
 	}
 	if (m_tmpWidget == _removeObject) {
-		m_tmpWidget = NULL;
+		m_tmpWidget = nullptr;
 	}
 }
diff --git a/sources/ewol/widget/Image.cpp b/sources/ewol/widget/Image.cpp
index 09b06240..a3a64ce9 100644
--- a/sources/ewol/widget/Image.cpp
+++ b/sources/ewol/widget/Image.cpp
@@ -36,7 +36,7 @@ const char * const ewol::widget::Image::configPartStart = "part-start";
 const char * const ewol::widget::Image::configPartStop = "part-stop";
 
 ewol::widget::Image::Image(const std::string& _file, const ewol::Dimension& _border) :
-  m_colorProperty(NULL),
+  m_colorProperty(nullptr),
   m_colorId(-1),
   m_imageSize(vec2(0.0f,0.0f)),
   m_keepRatio(true),
@@ -44,15 +44,15 @@ ewol::widget::Image::Image(const std::string& _file, const ewol::Dimension& _bor
   m_posStop(1.0f,1.0f) {
 	addObjectType("ewol::widget::Image");
 	addEventId(eventPressed);
-	registerConfig(configRatio, "bool", NULL, "Keep ratio of the image");
-	registerConfig(configSize, "Dimension", NULL, "Basic display size of the image");
-	registerConfig(configBorder, "Dimension", NULL, "Border of the image");
+	registerConfig(configRatio, "bool", nullptr, "Keep ratio of the image");
+	registerConfig(configSize, "Dimension", nullptr, "Basic display size of the image");
+	registerConfig(configBorder, "Dimension", nullptr, "Border of the image");
 	registerConfig(configSource, "string", "Image source path");
 	registerConfig(configDistanceField, "bool", "Distance field mode");
-	registerConfig(configPartStart, "vec2", NULL, "Start display position in the image [0.0 .. 1.0]");
-	registerConfig(configPartStop,  "vec2", NULL, "Stop display position in the image [0.0 .. 1.0]");
+	registerConfig(configPartStart, "vec2", nullptr, "Start display position in the image [0.0 .. 1.0]");
+	registerConfig(configPartStop,  "vec2", nullptr, "Stop display position in the image [0.0 .. 1.0]");
 	m_colorProperty = ewol::resource::ColorFile::keep("THEME:COLOR:Image.json");
-	if (m_colorProperty != NULL) {
+	if (m_colorProperty != nullptr) {
 		m_colorId = m_colorProperty->request("foreground");
 	}
 	set(_file, _border);
@@ -147,7 +147,7 @@ void ewol::widget::Image::onRegenerateDisplay() {
 	if (true == needRedraw()) {
 		// remove data of the previous composition :
 		m_compositing.clear();
-		if (m_colorProperty != NULL) {
+		if (m_colorProperty != nullptr) {
 			m_compositing.setColor(m_colorProperty->get(m_colorId));
 		}
 		// calculate the new position and size :
@@ -230,7 +230,7 @@ bool ewol::widget::Image::onEventInput(const ewol::event::Input& _event) {
 }
 
 bool ewol::widget::Image::loadXML(exml::Element* _node) {
-	if (NULL == _node) {
+	if (nullptr == _node) {
 		return false;
 	}
 	ewol::Widget::loadXML(_node);
diff --git a/sources/ewol/widget/Joystick.cpp b/sources/ewol/widget/Joystick.cpp
index 3a0490b3..44b5057b 100644
--- a/sources/ewol/widget/Joystick.cpp
+++ b/sources/ewol/widget/Joystick.cpp
@@ -67,9 +67,9 @@ void ewol::widget::Joystick::onRegenerateDisplay() {
 		// clean the object list ...
 		
 		/*
-		ewol::OObject2DColored * tmpOObjects = NULL;
-		ewol::OObject2DTextured * tmpOOtexBg = NULL;
-		ewol::OObject2DTextured * tmpOOtexFg = NULL;
+		ewol::OObject2DColored * tmpOObjects = nullptr;
+		ewol::OObject2DTextured * tmpOOtexBg = nullptr;
+		ewol::OObject2DTextured * tmpOOtexFg = nullptr;
 		// set background
 		if (true == m_displayBackground) {
 			if (m_background == "") {
@@ -84,7 +84,7 @@ void ewol::widget::Joystick::onRegenerateDisplay() {
 		// set cursor point
 		float sizeElement = m_size.x*m_ratio;
 		if (m_foreground == "") {
-			if (NULL == tmpOObjects) {
+			if (nullptr == tmpOObjects) {
 				tmpOObjects = new ewol::OObject2DColored;
 			}
 			tmpOObjects->setColor(m_colorFg);
@@ -96,13 +96,13 @@ void ewol::widget::Joystick::onRegenerateDisplay() {
 			                      ((m_displayPos.y+1.0)/2.0)*(m_size.y-2*sizeElement), sizeElement*2, sizeElement*2);
 		}
 		// add all needed objects ...
-		if (NULL != tmpOObjects) {
+		if (nullptr != tmpOObjects) {
 			addOObject(tmpOObjects);
 		}
-		if (NULL != tmpOOtexBg) {
+		if (nullptr != tmpOOtexBg) {
 			addOObject(tmpOOtexBg);
 		}
-		if (NULL != tmpOOtexFg) {
+		if (nullptr != tmpOOtexFg) {
 			addOObject(tmpOOtexFg);
 		}
 		*/
diff --git a/sources/ewol/widget/Label.cpp b/sources/ewol/widget/Label.cpp
index fbff21cd..aa5ad487 100644
--- a/sources/ewol/widget/Label.cpp
+++ b/sources/ewol/widget/Label.cpp
@@ -27,12 +27,12 @@ void ewol::widget::Label::init(ewol::widget::Manager& _widgetManager) {
 }
 // TODO : Remove the label name in the constructor ...
 ewol::widget::Label::Label(std::string _newLabel) :
-  m_colorProperty(NULL),
+  m_colorProperty(nullptr),
   m_colorDefaultFgText(-1),
   m_colorDefaultBgText(-1){
 	addObjectType("ewol::widget::Label");
 	m_colorProperty = ewol::resource::ColorFile::keep("THEME:COLOR:Label.json");
-	if (m_colorProperty != NULL) {
+	if (m_colorProperty != nullptr) {
 		m_colorDefaultFgText = m_colorProperty->request("foreground");
 		m_colorDefaultBgText = m_colorProperty->request("background");
 	}
@@ -40,7 +40,7 @@ ewol::widget::Label::Label(std::string _newLabel) :
 	addEventId(eventPressed);
 	setCanHaveFocus(false);
 	setMouseLimit(1);
-	registerConfig(configValue, "string", NULL, "displayed value string"); // TODO : do not store in attibute...
+	registerConfig(configValue, "string", nullptr, "displayed value string"); // TODO : do not store in attibute...
 }
 
 ewol::widget::Label::~Label() {
@@ -124,7 +124,7 @@ void ewol::widget::Label::onRegenerateDisplay() {
 	
 	// clean the element
 	m_text.reset();
-	if (m_colorProperty != NULL) {
+	if (m_colorProperty != nullptr) {
 		m_text.setDefaultColorFg(m_colorProperty->get(m_colorDefaultFgText));
 		m_text.setDefaultColorBg(m_colorProperty->get(m_colorDefaultBgText));
 	}
@@ -148,7 +148,7 @@ bool ewol::widget::Label::onEventInput(const ewol::event::Input& _event) {
 }
 
 bool ewol::widget::Label::loadXML(exml::Element* _node) {
-	if (NULL == _node) {
+	if (nullptr == _node) {
 		return false;
 	}
 	ewol::Widget::loadXML(_node);
diff --git a/sources/ewol/widget/Layer.cpp b/sources/ewol/widget/Layer.cpp
index 8b2ddaba..3e610a43 100644
--- a/sources/ewol/widget/Layer.cpp
+++ b/sources/ewol/widget/Layer.cpp
@@ -31,24 +31,24 @@ ewol::widget::Layer::~Layer() {
 
 ewol::object::Shared<ewol::Widget> ewol::widget::Layer::getWidgetAtPos(const vec2& _pos) {
 	if (true == isHide()) {
-		return NULL;
+		return nullptr;
 	}
 	// for all element in the sizer ...
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii]) {
+		if (nullptr != m_subWidget[iii]) {
 			vec2 tmpSize = m_subWidget[iii]->getSize();
 			vec2 tmpOrigin = m_subWidget[iii]->getOrigin();
 			if(    (tmpOrigin.x() <= _pos.x() && tmpOrigin.x() + tmpSize.x() >= _pos.x())
 			    && (tmpOrigin.y() <= _pos.y() && tmpOrigin.y() + tmpSize.y() >= _pos.y()) )
 			{
 				ewol::object::Shared<ewol::Widget> tmpWidget = m_subWidget[iii]->getWidgetAtPos(_pos);
-				if (NULL != tmpWidget) {
+				if (nullptr != tmpWidget) {
 					return tmpWidget;
 				}
 				// parse the next layer ...
 			}
 		}
 	}
-	return NULL;
+	return nullptr;
 };
 
diff --git a/sources/ewol/widget/List.cpp b/sources/ewol/widget/List.cpp
index 6b791e21..a7089290 100644
--- a/sources/ewol/widget/List.cpp
+++ b/sources/ewol/widget/List.cpp
@@ -32,7 +32,7 @@ ewol::widget::List::~List() {
 	//clean all the object
 	for (size_t iii=0; iii<m_listOObject.size(); iii++) {
 		delete(m_listOObject[iii]);
-		m_listOObject[iii] = NULL;
+		m_listOObject[iii] = nullptr;
 	}
 	m_listOObject.clear();
 }
@@ -74,7 +74,7 @@ void ewol::widget::List::calculateMinMaxSize() {
 }
 
 void ewol::widget::List::addOObject(ewol::Compositing* _newObject, int32_t _pos) {
-	if (NULL == _newObject) {
+	if (nullptr == _newObject) {
 		EWOL_ERROR("Try to add an empty object in the Widget generic display system");
 		return;
 	}
@@ -88,14 +88,14 @@ void ewol::widget::List::addOObject(ewol::Compositing* _newObject, int32_t _pos)
 void ewol::widget::List::clearOObjectList() {
 	for (size_t iii=0; iii<m_listOObject.size(); iii++) {
 		delete(m_listOObject[iii]);
-		m_listOObject[iii] = NULL;
+		m_listOObject[iii] = nullptr;
 	}
 	m_listOObject.clear();
 }
 
 void ewol::widget::List::onDraw() {
 	for (size_t iii=0; iii<m_listOObject.size(); iii++) {
-		if (NULL != m_listOObject[iii]) {
+		if (nullptr != m_listOObject[iii]) {
 			m_listOObject[iii]->draw();
 		}
 	}
@@ -174,7 +174,7 @@ void ewol::widget::List::onRegenerateDisplay() {
 				getElement(jjj, iii, myTextToWrite, fg, bg);
 				
 				ewol::compositing::Text * tmpText = new ewol::compositing::Text();
-				if (NULL != tmpText) {
+				if (nullptr != tmpText) {
 					// get font size : 
 					int32_t tmpFontHeight = tmpText->calculateSize(char32_t('A')).y();
 					displayPositionY-=(tmpFontHeight+m_paddingSizeY);
diff --git a/sources/ewol/widget/ListFileSystem.cpp b/sources/ewol/widget/ListFileSystem.cpp
index 09567ecd..cc5a8db8 100644
--- a/sources/ewol/widget/ListFileSystem.cpp
+++ b/sources/ewol/widget/ListFileSystem.cpp
@@ -47,7 +47,7 @@ ewol::widget::ListFileSystem::ListFileSystem() :
 		m_folder = "c:/";
 	#endif
 	m_colorProperty = ewol::resource::ColorFile::keep("THEME:COLOR:ListFileSystem.json");
-	if (m_colorProperty != NULL) {
+	if (m_colorProperty != nullptr) {
 		m_colorIdText = m_colorProperty->request("text");
 		m_colorIdBackground1 = m_colorProperty->request("background1");
 		m_colorIdBackground2 = m_colorProperty->request("background2");
@@ -58,12 +58,12 @@ ewol::widget::ListFileSystem::ListFileSystem() :
 	addEventId(eventFolderSelect);
 	addEventId(eventFolderValidate);
 	
-	registerConfig(configShowHidden, "bool", NULL, "Show the hidden element (file, folder, ...)");
-	registerConfig(configShowFile, "bool", NULL, "display files");
-	registerConfig(configShowFolder, "bool", NULL, "display folders");
-	registerConfig(configShowTemporary, "bool", NULL, "display temporary files");
-	registerConfig(configPath, "string", NULL, "Path to display");
-	registerConfig(configSelect, "string", NULL, "selection af a specific file");
+	registerConfig(configShowHidden, "bool", nullptr, "Show the hidden element (file, folder, ...)");
+	registerConfig(configShowFile, "bool", nullptr, "display files");
+	registerConfig(configShowFolder, "bool", nullptr, "display folders");
+	registerConfig(configShowTemporary, "bool", nullptr, "display temporary files");
+	registerConfig(configPath, "string", nullptr, "Path to display");
+	registerConfig(configSelect, "string", nullptr, "selection af a specific file");
 	
 	setMouseLimit(1);
 };
@@ -75,9 +75,9 @@ ewol::widget::ListFileSystem::~ListFileSystem() {
 
 void ewol::widget::ListFileSystem::clearList() {
 	for (size_t iii=0; iii<m_list.size(); iii++) {
-		if (NULL != m_list[iii]) {
+		if (nullptr != m_list[iii]) {
 			delete(m_list[iii]);
-			m_list[iii] = NULL;
+			m_list[iii] = nullptr;
 		}
 	}
 };
@@ -102,7 +102,7 @@ void ewol::widget::ListFileSystem::regenerateView() {
 std::string ewol::widget::ListFileSystem::getSelect() const {
 	std::string tmpVal = "";
 	if (m_selectedLine >= 0) {
-		if (m_list[m_selectedLine] != NULL) {
+		if (m_list[m_selectedLine] != nullptr) {
 			tmpVal = m_list[m_selectedLine]->getNameFile();
 		}
 	}
@@ -115,7 +115,7 @@ void ewol::widget::ListFileSystem::setSelect(const std::string& _data) {
 	m_selectedLine = -1;
 	// search the coresponding file :
 	for (size_t iii=0; iii<m_list.size(); iii++) {
-		if (NULL!=m_list[iii]) {
+		if (nullptr!=m_list[iii]) {
 			if (m_list[iii]->getNameFile() == _data) {
 				// we find the line :
 				m_selectedLine = iii;
@@ -164,7 +164,7 @@ bool ewol::widget::ListFileSystem::getElement(int32_t _colomn, int32_t _raw, std
 	}
 	if(    _raw-offset >= 0
 	    && _raw-offset < (int32_t)m_list.size()
-	    && NULL != m_list[_raw-offset]) {
+	    && nullptr != m_list[_raw-offset]) {
 		_myTextToWrite = m_list[_raw-offset]->getNameFile();
 		EWOL_VERBOSE("get filename for : '" << *m_list[_raw-offset] << ":'" << _myTextToWrite << "'");
 	}
@@ -215,7 +215,7 @@ bool ewol::widget::ListFileSystem::onItemEvent(int32_t _IdInput,
 					generateEventId(eventFolderSelect, "..");
 				} else if(    m_selectedLine-offset  >= 0
 				           && m_selectedLine-offset < (int32_t)m_list.size()
-				           && NULL != m_list[m_selectedLine-offset] ) {
+				           && nullptr != m_list[m_selectedLine-offset] ) {
 					// generate event extern : 
 					switch(m_list[m_selectedLine-offset]->getNodeType()) {
 						case etk::FSN_FILE :
@@ -240,7 +240,7 @@ bool ewol::widget::ListFileSystem::onItemEvent(int32_t _IdInput,
 					generateEventId(eventFolderValidate, "..");
 				} else if(    m_selectedLine-offset >= 0
 				           && m_selectedLine-offset < (int32_t)m_list.size()
-				           && NULL != m_list[m_selectedLine-offset] ) {
+				           && nullptr != m_list[m_selectedLine-offset] ) {
 					switch(m_list[m_selectedLine-offset]->getNodeType())
 					{
 						case etk::FSN_FILE :
diff --git a/sources/ewol/widget/Manager.cpp b/sources/ewol/widget/Manager.cpp
index d4715c78..b84877bd 100644
--- a/sources/ewol/widget/Manager.cpp
+++ b/sources/ewol/widget/Manager.cpp
@@ -32,8 +32,8 @@
 #define __class__ "ewol::widget::Manager"
 
 ewol::widget::Manager::Manager() :
-  m_focusWidgetDefault(NULL),
-  m_focusWidgetCurrent(NULL),
+  m_focusWidgetDefault(nullptr),
+  m_focusWidgetCurrent(nullptr),
   m_havePeriodic(false),
   m_haveRedraw(true),
   m_applWakeUpTime(0),
@@ -65,7 +65,7 @@ ewol::widget::Manager::Manager() :
 ewol::widget::Manager::~Manager() {
 	EWOL_DEBUG(" == > Un-Init Widget-Manager");
 	EWOL_INFO("Realease all FOCUS");
-	focusSetDefault(NULL);
+	focusSetDefault(nullptr);
 	focusRelease();
 	
 	m_listOfPeriodicWidget.clear();
@@ -82,7 +82,7 @@ void ewol::widget::Manager::rm(ewol::object::Shared<ewol::Widget> _newWidget) {
  * *************************************************************************/
 
 void ewol::widget::Manager::focusKeep(ewol::object::Shared<ewol::Widget> _newWidget) {
-	if (NULL == _newWidget) {
+	if (nullptr == _newWidget) {
 		// nothing to do ...
 		return;
 	}
@@ -90,35 +90,35 @@ void ewol::widget::Manager::focusKeep(ewol::object::Shared<ewol::Widget> _newWid
 		// nothing to do ...
 		return;
 	}
-	if (NULL != m_focusWidgetCurrent) {
+	if (nullptr != m_focusWidgetCurrent) {
 		EWOL_DEBUG("Rm focus on WidgetID=" << m_focusWidgetCurrent->getId() );
 		m_focusWidgetCurrent->rmFocus();
-		m_focusWidgetCurrent = NULL;
+		m_focusWidgetCurrent = nullptr;
 	}
 	if (false == _newWidget->canHaveFocus()) {
 		EWOL_VERBOSE("Widget can not have focus, id=" << _newWidget->getId() );
 		return;
 	}
 	m_focusWidgetCurrent = _newWidget;
-	if (NULL != m_focusWidgetCurrent) {
+	if (nullptr != m_focusWidgetCurrent) {
 		EWOL_DEBUG("Set focus on WidgetID=" << m_focusWidgetCurrent->getId() );
 		m_focusWidgetCurrent->setFocus();
 	}
 }
 
 void ewol::widget::Manager::focusSetDefault(ewol::object::Shared<ewol::Widget> _newWidget) {
-	if(    NULL != _newWidget
+	if(    nullptr != _newWidget
 	    && false == _newWidget->canHaveFocus() ) {
 		EWOL_VERBOSE("Widget can not have focus, id=" << _newWidget->getId() );
 		return;
 	}
 	if (m_focusWidgetDefault == m_focusWidgetCurrent) {
-		if (NULL != m_focusWidgetCurrent) {
+		if (nullptr != m_focusWidgetCurrent) {
 			EWOL_DEBUG("Rm focus on WidgetID=" << m_focusWidgetCurrent->getId() );
 			m_focusWidgetCurrent->rmFocus();
 		}
 		m_focusWidgetCurrent = _newWidget;
-		if (NULL != m_focusWidgetCurrent) {
+		if (nullptr != m_focusWidgetCurrent) {
 			EWOL_DEBUG("Set focus on WidgetID=" << m_focusWidgetCurrent->getId() );
 			m_focusWidgetCurrent->setFocus();
 		}
@@ -131,12 +131,12 @@ void ewol::widget::Manager::focusRelease() {
 		// nothink to do ...
 		return;
 	}
-	if (NULL != m_focusWidgetCurrent) {
+	if (nullptr != m_focusWidgetCurrent) {
 		EWOL_DEBUG("Rm focus on WidgetID=" << m_focusWidgetCurrent->getId() );
 		m_focusWidgetCurrent->rmFocus();
 	}
 	m_focusWidgetCurrent = m_focusWidgetDefault;
-	if (NULL != m_focusWidgetCurrent) {
+	if (nullptr != m_focusWidgetCurrent) {
 		EWOL_DEBUG("Set focus on WidgetID=" << m_focusWidgetCurrent->getId() );
 		m_focusWidgetCurrent->setFocus();
 	}
@@ -154,7 +154,7 @@ void ewol::widget::Manager::focusRemoveIfRemove(ewol::object::Shared<ewol::Widge
 	}
 	if (m_focusWidgetDefault == _newWidget) {
 		EWOL_WARNING("Release default focus when remove widget");
-		focusSetDefault(NULL);
+		focusSetDefault(nullptr);
 	}
 }
 
@@ -165,7 +165,7 @@ void ewol::widget::Manager::periodicCallAdd(ewol::object::Shared<ewol::Widget> _
 		}
 	}
 	for (size_t iii=0; iii < m_listOfPeriodicWidget.size(); iii++) {
-		if (NULL == m_listOfPeriodicWidget[iii]) {
+		if (nullptr == m_listOfPeriodicWidget[iii]) {
 			m_listOfPeriodicWidget[iii] = _pWidget;
 			return;
 		}
@@ -178,7 +178,7 @@ void ewol::widget::Manager::periodicCallRm(ewol::object::Shared<ewol::Widget> _p
 	int32_t nbElement = 0;
 	for (int32_t iii=m_listOfPeriodicWidget.size()-1; iii >= 0 ; iii--) {
 		if (m_listOfPeriodicWidget[iii] == _pWidget) {
-			m_listOfPeriodicWidget[iii] = NULL;
+			m_listOfPeriodicWidget[iii] = nullptr;
 		} else {
 			nbElement++;
 		}
@@ -204,7 +204,7 @@ void ewol::widget::Manager::periodicCall(int64_t _localTime) {
 	
 	EWOL_VERBOSE("periodic : " << _localTime);
 	for (int32_t iii=m_listOfPeriodicWidget.size()-1; iii >= 0 ; iii--) {
-		if (NULL != m_listOfPeriodicWidget[iii]) {
+		if (nullptr != m_listOfPeriodicWidget[iii]) {
 			int64_t deltaTimeCallUser = m_listOfPeriodicWidget[iii]->systemGetCallDeltaTime();
 			if (deltaTimeCallUser <= 0) {
 				myTime.setDeltaCall(deltaTime);
@@ -245,7 +245,7 @@ bool ewol::widget::Manager::isDrawingNeeded() {
 // element that generate the list of elements
 void ewol::widget::Manager::addWidgetCreator(const std::string& _name,
                                              ewol::widget::Manager::creator_tf _pointer) {
-	if (NULL == _pointer) {
+	if (nullptr == _pointer) {
 		return;
 	}
 	//Keep name in lower case :
@@ -268,7 +268,7 @@ ewol::object::Shared<ewol::Widget> ewol::widget::Manager::create(const std::stri
 		}
 	}
 	EWOL_WARNING("try to create an UnExistant widget : " << nameLower);
-	return NULL;
+	return nullptr;
 }
 
 bool ewol::widget::Manager::exist(const std::string& _name) {
diff --git a/sources/ewol/widget/Menu.cpp b/sources/ewol/widget/Menu.cpp
index aea322ca..73eb631d 100644
--- a/sources/ewol/widget/Menu.cpp
+++ b/sources/ewol/widget/Menu.cpp
@@ -21,7 +21,7 @@
 ewol::widget::Menu::Menu() {
 	addObjectType("ewol::widget::Menu");
 	m_staticId = 0;
-	m_widgetContextMenu = NULL;
+	m_widgetContextMenu = nullptr;
 }
 
 ewol::widget::Menu::~Menu() {
@@ -48,9 +48,9 @@ void ewol::widget::Menu::subWidgetUnLink(ewol::object::Shared<ewol::Widget> _new
 
 void ewol::widget::Menu::clear() {
 	for (size_t iii=0; iii < m_listElement.size(); iii++) {
-		if (m_listElement[iii] != NULL) {
+		if (m_listElement[iii] != nullptr) {
 			delete(m_listElement[iii]);
-			m_listElement[iii] = NULL;
+			m_listElement[iii] = nullptr;
 		}
 	}
 	m_listElement.clear();
@@ -69,22 +69,22 @@ int32_t ewol::widget::Menu::add(int32_t _parent,
                                 const char *_generateEvent,
                                 const std::string _message) {
 	ewol::widget::MenuElement *tmpObject = new ewol::widget::MenuElement();
-	if (NULL == tmpObject) {
+	if (nullptr == tmpObject) {
 		EWOL_ERROR("Allocation problem");
 		return -1;
 	}
 	tmpObject->m_localId = m_staticId++;
 	tmpObject->m_parentId = _parent;
-	tmpObject->m_widgetPointer = NULL;
+	tmpObject->m_widgetPointer = nullptr;
 	tmpObject->m_label = std::string("<left>") + _label + "</left>";
 	tmpObject->m_image = _image;
 	tmpObject->m_generateEvent = _generateEvent;
 	tmpObject->m_message = _message;
 	m_listElement.push_back(tmpObject);
 	if (-1 == tmpObject->m_parentId) {
-		ewol::widget::Button *myButton = NULL;
+		ewol::widget::Button *myButton = nullptr;
 		myButton = new ewol::widget::Button();
-		if (NULL == myButton) {
+		if (nullptr == myButton) {
 			EWOL_ERROR("Allocation button error");
 			return tmpObject->m_localId;
 		}
@@ -127,14 +127,14 @@ void ewol::widget::Menu::onReceiveMessage(const ewol::object::Message& _msg) {
 		for (size_t iii=0; iii<m_listElement.size(); iii++) {
 			if (_msg.getCaller() == m_listElement[iii]->m_widgetPointer) {
 				// 2 posible case (have a message or have a child ...
-				if (m_listElement[iii]->m_generateEvent != NULL) {
+				if (m_listElement[iii]->m_generateEvent != nullptr) {
 					EWOL_DEBUG("Menu  == > generate Event");
 					// Send a multicast event ...
 					sendMultiCast(m_listElement[iii]->m_generateEvent, m_listElement[iii]->m_message);
-					if (NULL != m_widgetContextMenu) {
+					if (nullptr != m_widgetContextMenu) {
 						EWOL_DEBUG("Mark the menu to remove ...");
 						m_widgetContextMenu->removeObject();
-						m_widgetContextMenu = NULL;
+						m_widgetContextMenu = nullptr;
 					}
 					return;
 				} else{
@@ -152,7 +152,7 @@ void ewol::widget::Menu::onReceiveMessage(const ewol::object::Message& _msg) {
 					}
 					// create a context menu : 
 					m_widgetContextMenu = new ewol::widget::ContextMenu();
-					if (NULL == m_widgetContextMenu) {
+					if (nullptr == m_widgetContextMenu) {
 						EWOL_ERROR("Allocation Error");
 						return;
 					}
@@ -161,7 +161,7 @@ void ewol::widget::Menu::onReceiveMessage(const ewol::object::Message& _msg) {
 					// TODO : Set it back :
 					/*
 					ewol::object::Shared<ewol::Widget> eventFromWidget = static_cast<ewol::object::Shared<ewol::Widget>>(_msg.getCaller());
-					if (NULL != eventFromWidget) {
+					if (nullptr != eventFromWidget) {
 						vec2 tmpOri  = eventFromWidget->getOrigin();
 						vec2 tmpSize = eventFromWidget->getSize();
 						// calculate the correct position
@@ -171,18 +171,18 @@ void ewol::widget::Menu::onReceiveMessage(const ewol::object::Message& _msg) {
 					*/
 					m_widgetContextMenu->setPositionMark(ewol::widget::ContextMenu::markTop, newPosition );
 					
-					ewol::widget::Sizer * mySizer = NULL;
-					ewol::widget::Button * myButton = NULL;
+					ewol::widget::Sizer * mySizer = nullptr;
+					ewol::widget::Button * myButton = nullptr;
 					
 					mySizer = new ewol::widget::Sizer(widget::Sizer::modeVert);
-					if (NULL != mySizer) {
+					if (nullptr != mySizer) {
 						mySizer->lockExpand(vec2(true,true));
 						// set it in the pop-up-system : 
 						m_widgetContextMenu->setSubWidget(mySizer);
 						
 						bool menuHaveImage = false;
 						for (int64_t jjj=m_listElement.size()-1; jjj >= 0; jjj--) {
-							if (m_listElement[iii]!=NULL) {
+							if (m_listElement[iii]!=nullptr) {
 								if (m_listElement[iii]->m_localId == m_listElement[jjj]->m_parentId) {
 									if (m_listElement[jjj]->m_image.size()!=0) {
 										menuHaveImage = true;
@@ -192,10 +192,10 @@ void ewol::widget::Menu::onReceiveMessage(const ewol::object::Message& _msg) {
 							}
 						}
 						for (int64_t jjj=m_listElement.size()-1; jjj >= 0; jjj--) {
-							if (m_listElement[iii]!=NULL) {
+							if (m_listElement[iii]!=nullptr) {
 								if (m_listElement[iii]->m_localId == m_listElement[jjj]->m_parentId) {
 									myButton = new ewol::widget::Button();
-									if (NULL == myButton) {
+									if (nullptr == myButton) {
 										EWOL_ERROR("Allocation Error");
 									} else {
 										if (m_listElement[jjj]->m_image.size()!=0) {
@@ -223,7 +223,7 @@ void ewol::widget::Menu::onReceiveMessage(const ewol::object::Message& _msg) {
 												        "</composer>\n"));
 											} else {
 												ewol::widget::Label* tmpLabel = new widget::Label(std::string("<left>") + m_listElement[jjj]->m_label + "</left>\n");
-												if (NULL != tmpLabel) {
+												if (nullptr != tmpLabel) {
 													tmpLabel->setExpand(bvec2(true,false));
 													tmpLabel->setFill(bvec2(true,true));
 													myButton->setSubWidget(tmpLabel);
@@ -246,7 +246,7 @@ void ewol::widget::Menu::onReceiveMessage(const ewol::object::Message& _msg) {
 					if (currentWindows == nullptr) {
 						EWOL_ERROR("Can not get the curent Windows...");
 						m_widgetContextMenu->removeObject();
-						m_widgetContextMenu = NULL;
+						m_widgetContextMenu = nullptr;
 					} else {
 						currentWindows->popUpWidgetPush(m_widgetContextMenu);
 					}
@@ -262,10 +262,10 @@ void ewol::widget::Menu::onObjectRemove(ewol::object::Shared<ewol::Object> _remo
 	ewol::widget::Sizer::onObjectRemove(_removeObject);
 	if (m_widgetContextMenu == _removeObject) {
 		delete(m_widgetContextMenu);
-		m_widgetContextMenu = NULL;
+		m_widgetContextMenu = nullptr;
 	}
 	for (size_t jjj=0; jjj<m_listElement.size(); jjj++) {
-		if (NULL != m_listElement[jjj]) {
+		if (nullptr != m_listElement[jjj]) {
 			if (m_listElement[jjj]->m_widgetPointer == _removeObject) {
 				m_listElement[jjj]->m_widgetPointer.reset();
 			}
diff --git a/sources/ewol/widget/Menu.h b/sources/ewol/widget/Menu.h
index 3ca58c6a..aad50f2b 100644
--- a/sources/ewol/widget/Menu.h
+++ b/sources/ewol/widget/Menu.h
@@ -20,7 +20,7 @@ namespace ewol {
 	namespace widget {
 		class MenuElement {
 			public : 
-				MenuElement() : m_widgetPointer(NULL) { };
+				MenuElement() : m_widgetPointer(nullptr) { };
 				int32_t m_localId;
 				int32_t m_parentId;
 				ewol::object::Shared<ewol::Object> m_widgetPointer;
@@ -47,8 +47,8 @@ namespace ewol {
 				ewol::widget::ContextMenu* m_widgetContextMenu;
 			public:
 				void clear();
-				int32_t addTitle(std::string _label, std::string _image="", const char * _generateEvent = NULL, const std::string _message = "");
-				int32_t add(int32_t parent, std::string _label, std::string _image="", const char * _generateEvent = NULL, const std::string _message = "");
+				int32_t addTitle(std::string _label, std::string _image="", const char * _generateEvent = nullptr, const std::string _message = "");
+				int32_t add(int32_t parent, std::string _label, std::string _image="", const char * _generateEvent = nullptr, const std::string _message = "");
 				void addSpacer();
 				// Derived function
 				virtual void onReceiveMessage(const ewol::object::Message& _msg);
diff --git a/sources/ewol/widget/PopUp.cpp b/sources/ewol/widget/PopUp.cpp
index df4f68d9..c99e1f88 100644
--- a/sources/ewol/widget/PopUp.cpp
+++ b/sources/ewol/widget/PopUp.cpp
@@ -37,9 +37,9 @@ ewol::widget::PopUp::PopUp(const std::string& _shaperName) :
 	addObjectType("ewol::widget::PopUp");
 	m_userExpand.setValue(false, false);
 	setMinSize(ewol::Dimension(vec2(80,80),ewol::Dimension::Pourcent));
-	registerConfig(configShaper, "string", NULL, "The shaper properties");
-	registerConfig(configRemoveOnExternClick, "bool", NULL, "Remove the widget if the use click outside");
-	registerConfig(configLockExpand, "bool", NULL, "Lock expand contamination");
+	registerConfig(configShaper, "string", nullptr, "The shaper properties");
+	registerConfig(configRemoveOnExternClick, "bool", nullptr, "Remove the widget if the use click outside");
+	registerConfig(configLockExpand, "bool", nullptr, "Lock expand contamination");
 	registerConfig(configAnimation, "list", "none;increase", "Annimation type");
 	
 	// Add annimations :
@@ -65,7 +65,7 @@ void ewol::widget::PopUp::setShaperName(const std::string& _shaperName) {
 
 void ewol::widget::PopUp::calculateSize(const vec2& _available) {
 	ewol::Widget::calculateSize(_available);
-	if (NULL != m_subWidget) {
+	if (nullptr != m_subWidget) {
 		ewol::Padding padding = m_shaper.getPadding();
 		vec2 subWidgetSize = m_subWidget->getCalculateMinSize();
 		if (true == m_subWidget->canExpand().x()) {
@@ -103,7 +103,7 @@ void ewol::widget::PopUp::systemDraw(const ewol::DrawProperty& _displayProp) {
 		return;
 	}
 	ewol::Widget::systemDraw(_displayProp);
-	if (NULL!=m_subWidget) {
+	if (nullptr!=m_subWidget) {
 		if(    m_shaper.getNextDisplayedStatus() == -1
 		    && m_shaper.getTransitionStatus() >= 1.0) {
 			ewol::DrawProperty prop = _displayProp;
@@ -130,7 +130,7 @@ void ewol::widget::PopUp::onRegenerateDisplay() {
 		if (fill.y()) {
 			tmpSize.setY(m_size.y()-padding.y());
 		}
-		if (NULL != m_subWidget) {
+		if (nullptr != m_subWidget) {
 			vec2 tmpSize = m_subWidget->getSize();
 		}
 		tmpSize.setMax(m_minSize);
@@ -142,14 +142,14 @@ void ewol::widget::PopUp::onRegenerateDisplay() {
 		                  vec2ClipInt32(tmpSize + vec2(padding.x(), padding.y())));
 	}
 	// SUBwIDGET GENERATION ...
-	if (NULL != m_subWidget) {
+	if (nullptr != m_subWidget) {
 		m_subWidget->onRegenerateDisplay();
 	}
 }
 
 ewol::object::Shared<ewol::Widget> ewol::widget::PopUp::getWidgetAtPos(const vec2& _pos) {
 	ewol::object::Shared<ewol::Widget> val = ewol::widget::Container::getWidgetAtPos(_pos);
-	if (NULL != val) {
+	if (nullptr != val) {
 		return val;
 	}
 	return this;
@@ -198,7 +198,7 @@ bool ewol::widget::PopUp::onEventInput(const ewol::event::Input& _event) {
 		if (true == m_closeOutEvent) {
 			ewol::Padding padding = m_shaper.getPadding();
 			vec2 tmpSize(0,0);
-			if (NULL != m_subWidget) {
+			if (nullptr != m_subWidget) {
 				vec2 tmpSize = m_subWidget->getSize();
 			}
 			tmpSize.setMax(m_minSize);
diff --git a/sources/ewol/widget/ProgressBar.cpp b/sources/ewol/widget/ProgressBar.cpp
index d62fb8a2..583289e0 100644
--- a/sources/ewol/widget/ProgressBar.cpp
+++ b/sources/ewol/widget/ProgressBar.cpp
@@ -40,10 +40,10 @@ ewol::widget::ProgressBar::ProgressBar() {
 	m_textColorBgOff = etk::color::black;
 	m_textColorBgOff.setA(0x3F);
 	setCanHaveFocus(true);
-	registerConfig(configColorBg, "color", NULL, "Background color");
-	registerConfig(configColorFgOn, "color", NULL, "Corlor of the true value");
-	registerConfig(configColorFgOff, "color", NULL, "Corlor of the false value");
-	registerConfig(configValue, "integer", NULL, "Value of the progress bar");
+	registerConfig(configColorBg, "color", nullptr, "Background color");
+	registerConfig(configColorFgOn, "color", nullptr, "Corlor of the true value");
+	registerConfig(configColorFgOff, "color", nullptr, "Corlor of the false value");
+	registerConfig(configValue, "integer", nullptr, "Value of the progress bar");
 	
 }
 
diff --git a/sources/ewol/widget/Scroll.cpp b/sources/ewol/widget/Scroll.cpp
index d708b4dd..ff5e3a0d 100644
--- a/sources/ewol/widget/Scroll.cpp
+++ b/sources/ewol/widget/Scroll.cpp
@@ -34,7 +34,7 @@ ewol::widget::Scroll::Scroll(const std::string& _shaperName) :
   m_highSpeedButton(-1),
   m_highSpeedType(ewol::key::typeUnknow) {
 	addObjectType("ewol::widget::Scroll");
-	registerConfig(configLimit, "vec2", NULL, "Limit the scroll maximum position [0..1]% represent the free space in the scoll when arrive at the end");
+	registerConfig(configLimit, "vec2", nullptr, "Limit the scroll maximum position [0..1]% represent the free space in the scoll when arrive at the end");
 }
 
 ewol::widget::Scroll::~Scroll() {
@@ -52,7 +52,7 @@ void ewol::widget::Scroll::calculateMinMaxSize() {
 	// call main class !! and not containter class ...
 	ewol::Widget::calculateMinMaxSize();
 	// call sub classes
-	if (NULL!=m_subWidget) {
+	if (nullptr!=m_subWidget) {
 		m_subWidget->calculateMinMaxSize();
 	}
 }
@@ -61,7 +61,7 @@ void ewol::widget::Scroll::systemDraw(const ewol::DrawProperty& _displayProp) {
 	if (m_hide == true) {
 		return;
 	}
-	if (NULL!=m_subWidget) {
+	if (nullptr!=m_subWidget) {
 		ewol::DrawProperty prop = _displayProp;
 		prop.limit(m_origin, m_size);
 		m_subWidget->systemDraw(prop);
@@ -87,7 +87,7 @@ void ewol::widget::Scroll::onRegenerateDisplay() {
 	ewol::Padding paddingHori = m_shaperH.getPadding();
 	vec2 scrollOffset(0,0);
 	vec2 scrollSize(0,0);
-	if (NULL!=m_subWidget) {
+	if (nullptr!=m_subWidget) {
 		scrollOffset = m_subWidget->getOffset();
 		scrollSize = m_subWidget->getSize();
 	}
@@ -123,7 +123,7 @@ bool ewol::widget::Scroll::onEventInput(const ewol::event::Input& _event) {
 	vec2 relativePos = relativePosition(_event.getPos());
 	vec2 scrollOffset(0,0);
 	vec2 scrollSize(0,0);
-	if (NULL!=m_subWidget) {
+	if (nullptr!=m_subWidget) {
 		scrollOffset = m_subWidget->getOffset();
 		scrollSize = m_subWidget->getSize();
 	}
@@ -147,7 +147,7 @@ bool ewol::widget::Scroll::onEventInput(const ewol::event::Input& _event) {
 					scrollOffset.setY((int32_t)(scrollSize.y() * (relativePos.y()-SCROLL_BAR_SPACE) / (m_size.y()-SCROLL_BAR_SPACE*2)));
 					scrollOffset.setY(etk_avg(0, scrollOffset.y(), (scrollSize.y() - m_size.y()*m_limit.y())));
 					markToRedraw();
-					if (NULL!=m_subWidget) {
+					if (nullptr!=m_subWidget) {
 						m_subWidget->setOffset(scrollOffset);
 					}
 					return true;
@@ -164,7 +164,7 @@ bool ewol::widget::Scroll::onEventInput(const ewol::event::Input& _event) {
 					scrollOffset.setX((int32_t)(scrollSize.x() * (relativePos.x()-SCROLL_BAR_SPACE) / (m_size.x()-SCROLL_BAR_SPACE*2)));
 					scrollOffset.setY(etk_avg(0, scrollOffset.x(), (scrollSize.x() - m_size.x()*m_limit.x())));
 					markToRedraw();
-					if (NULL!=m_subWidget) {
+					if (nullptr!=m_subWidget) {
 						m_subWidget->setOffset(scrollOffset);
 					}
 					return true;
@@ -177,7 +177,7 @@ bool ewol::widget::Scroll::onEventInput(const ewol::event::Input& _event) {
 				scrollOffset.setY(scrollOffset.y()-m_pixelScrolling);
 				scrollOffset.setY(etk_avg(0, scrollOffset.y(), (scrollSize.y() - m_size.y()*m_limit.y())));
 				markToRedraw();
-				if (NULL!=m_subWidget) {
+				if (nullptr!=m_subWidget) {
 					m_subWidget->setOffset(scrollOffset);
 				}
 				return true;
@@ -188,7 +188,7 @@ bool ewol::widget::Scroll::onEventInput(const ewol::event::Input& _event) {
 				scrollOffset.setY(scrollOffset.y()+m_pixelScrolling);
 				scrollOffset.setY(etk_avg(0, scrollOffset.y(), (scrollSize.y() - m_size.y()*m_limit.y())));
 				markToRedraw();
-				if (NULL!=m_subWidget) {
+				if (nullptr!=m_subWidget) {
 					m_subWidget->setOffset(scrollOffset);
 				}
 				return true;
@@ -257,7 +257,7 @@ bool ewol::widget::Scroll::onEventInput(const ewol::event::Input& _event) {
 					markToRedraw();
 				}
 				scrollOffset.setY(etk_avg(0, scrollOffset.y(), (scrollSize.y() - m_size.y()*m_limit.y())));
-				if (NULL!=m_subWidget) {
+				if (nullptr!=m_subWidget) {
 					m_subWidget->setOffset(scrollOffset);
 				}
 				return true;
@@ -267,7 +267,7 @@ bool ewol::widget::Scroll::onEventInput(const ewol::event::Input& _event) {
 				scrollOffset.setX((int32_t)(scrollSize.x() * (relativePos.x()-SCROLL_BAR_SPACE) / (m_size.x()-SCROLL_BAR_SPACE*2)));
 				scrollOffset.setX(etk_avg(0, scrollOffset.x(), (scrollSize.x() - m_size.x()*m_limit.x() )));
 				markToRedraw();
-				if (NULL!=m_subWidget) {
+				if (nullptr!=m_subWidget) {
 					m_subWidget->setOffset(scrollOffset);
 				}
 				return true;
@@ -277,7 +277,7 @@ bool ewol::widget::Scroll::onEventInput(const ewol::event::Input& _event) {
 				scrollOffset.setY((int32_t)(scrollSize.y() * (relativePos.y()-SCROLL_BAR_SPACE) / (m_size.y()-SCROLL_BAR_SPACE*2)));
 				scrollOffset.setY(etk_avg(0, scrollOffset.y(), (scrollSize.y() - m_size.y()*m_limit.x())));
 				markToRedraw();
-				if (NULL!=m_subWidget) {
+				if (nullptr!=m_subWidget) {
 					m_subWidget->setOffset(scrollOffset);
 				}
 				return true;
@@ -329,7 +329,7 @@ bool ewol::widget::Scroll::onEventInput(const ewol::event::Input& _event) {
 				m_highSpeedStartPos = relativePos;
 				EWOL_VERBOSE("SCROOL  == > MOVE " << scrollOffset);
 				markToRedraw();
-				if (NULL!=m_subWidget) {
+				if (nullptr!=m_subWidget) {
 					m_subWidget->setOffset(scrollOffset);
 				}
 				return true;
@@ -351,7 +351,7 @@ bool ewol::widget::Scroll::onEventInput(const ewol::event::Input& _event) {
 
 ewol::object::Shared<ewol::Widget> ewol::widget::Scroll::getWidgetAtPos(const vec2& _pos) {
 	ewol::object::Shared<ewol::Widget> tmpWidget = ewol::widget::Container::getWidgetAtPos(_pos);
-	if (NULL != tmpWidget) {
+	if (nullptr != tmpWidget) {
 		return tmpWidget;
 	}
 	return this;
diff --git a/sources/ewol/widget/Sizer.cpp b/sources/ewol/widget/Sizer.cpp
index 3cd7b079..293936ed 100644
--- a/sources/ewol/widget/Sizer.cpp
+++ b/sources/ewol/widget/Sizer.cpp
@@ -31,7 +31,7 @@ ewol::widget::Sizer::Sizer(enum displayMode _mode):
   m_animation(animationNone),
   m_animationTime(0) {
 	addObjectType("ewol::widget::Sizer");
-	registerConfig(configBorder, "dimension", NULL, "The sizer border size");
+	registerConfig(configBorder, "dimension", nullptr, "The sizer border size");
 	registerConfig(configMode, "list", "{vert,hori}", "The display mode");
 	
 }
@@ -66,7 +66,7 @@ void ewol::widget::Sizer::calculateSize(const vec2& _availlable) {
 	int32_t nbWidgetFixedSize=0;
 	int32_t nbWidgetNotFixedSize=0;
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii]) {
+		if (nullptr != m_subWidget[iii]) {
 			vec2 tmpSize = m_subWidget[iii]->getCalculateMinSize();
 			if (m_mode == ewol::widget::Sizer::modeVert) {
 				unexpandableSize += tmpSize.y();
@@ -100,7 +100,7 @@ void ewol::widget::Sizer::calculateSize(const vec2& _availlable) {
 	}
 	vec2 tmpOrigin = m_origin + tmpBorderSize;
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii]) {
+		if (nullptr != m_subWidget[iii]) {
 			vec2 tmpSize = m_subWidget[iii]->getCalculateMinSize();
 			// set the origin :
 			EWOL_VERBOSE("[" << getId() << "] set iii=" << iii << " ORIGIN : " << tmpOrigin << " & offset=" << m_offset);
@@ -137,7 +137,7 @@ void ewol::widget::Sizer::calculateMinMaxSize() {
 	EWOL_VERBOSE("[" << getId() << "] {" << getObjectType() << "} set min size : " <<  m_minSize);
 	m_minSize += tmpBorderSize*2;
 	for (int32_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (NULL != m_subWidget[iii]) {
+		if (nullptr != m_subWidget[iii]) {
 			m_subWidget[iii]->calculateMinMaxSize();
 			if (true == m_subWidget[iii]->canExpand().x()) {
 				m_subExpend.setX(true);
diff --git a/sources/ewol/widget/Spacer.cpp b/sources/ewol/widget/Spacer.cpp
index 1a54c861..323f6603 100644
--- a/sources/ewol/widget/Spacer.cpp
+++ b/sources/ewol/widget/Spacer.cpp
@@ -30,7 +30,7 @@ ewol::widget::Spacer::Spacer() {
 	setCanHaveFocus(false);
 	m_color = etk::color::black;
 	m_color.setA(0);
-	registerConfig(configColor, "color", NULL, "background of the spacer");
+	registerConfig(configColor, "color", nullptr, "background of the spacer");
 }
 
 ewol::widget::Spacer::~Spacer() {
diff --git a/sources/ewol/widget/Spacer.h b/sources/ewol/widget/Spacer.h
index 3ed894b2..765a8777 100644
--- a/sources/ewol/widget/Spacer.h
+++ b/sources/ewol/widget/Spacer.h
@@ -46,7 +46,7 @@ namespace ewol {
 				 */
 				void setColor(etk::Color<> _newColor) { m_color = _newColor; markToRedraw(); };
 			public: // Derived function
-				virtual ewol::object::Shared<ewol::Widget> getWidgetAtPos(const vec2& _pos) { return NULL; };
+				virtual ewol::object::Shared<ewol::Widget> getWidgetAtPos(const vec2& _pos) { return nullptr; };
 				virtual void onRegenerateDisplay();
 				virtual void onDraw();
 				virtual bool onSetConfig(const ewol::object::Config& _conf);
diff --git a/sources/ewol/widget/WSlider.cpp b/sources/ewol/widget/WSlider.cpp
index 27b521db..9b20c8a0 100644
--- a/sources/ewol/widget/WSlider.cpp
+++ b/sources/ewol/widget/WSlider.cpp
@@ -50,7 +50,7 @@ ewol::widget::WSlider::WSlider() :
 	addEventId(eventStopSlide);
 	// add configuration
 	registerConfig(configMode, "list", "vert;hori", "Transition mode of the slider");
-	registerConfig(configSpeed, "float", NULL, "Transition speed of the slider");
+	registerConfig(configSpeed, "float", nullptr, "Transition speed of the slider");
 }
 
 ewol::widget::WSlider::~WSlider() {
@@ -65,7 +65,7 @@ void ewol::widget::WSlider::calculateSize(const vec2& _availlable) {
 	if (m_windowsDestination == m_windowsSources) {
 		int32_t iii = m_windowsDestination;
 		if (iii < (int32_t)m_subWidget.size()) {
-			if (NULL != m_subWidget[iii]) {
+			if (nullptr != m_subWidget[iii]) {
 				m_subWidget[iii]->setOrigin(m_origin+m_offset);
 				m_subWidget[iii]->calculateSize(m_size);
 			}
@@ -77,7 +77,7 @@ void ewol::widget::WSlider::calculateSize(const vec2& _availlable) {
 		}
 		int32_t iii = m_windowsSources;
 		if (iii < (int32_t)m_subWidget.size()) {
-			if (NULL != m_subWidget[iii]) {
+			if (nullptr != m_subWidget[iii]) {
 				if (m_transitionSlide == sladingTransitionHori) {
 					m_subWidget[iii]->setOrigin(   vec2(m_origin.x() + factor*(m_size.x()*m_slidingProgress),
 					                                    m_origin.y())
@@ -92,7 +92,7 @@ void ewol::widget::WSlider::calculateSize(const vec2& _availlable) {
 		}
 		iii = m_windowsDestination;
 		if (iii < (int32_t)m_subWidget.size()) {
-			if (NULL != m_subWidget[iii]) {
+			if (nullptr != m_subWidget[iii]) {
 				if (m_transitionSlide == sladingTransitionHori) {
 					m_subWidget[iii]->setOrigin(   vec2(m_origin.x() + factor*(m_size.x()*m_slidingProgress - m_size.x()),
 					                                    m_origin.y())
@@ -126,7 +126,7 @@ void ewol::widget::WSlider::subWidgetSelectSet(int32_t _id) {
 	int32_t elementID = -1;
 	// search element in the list : 
 	for (size_t iii=0 ; iii<m_subWidget.size() ; iii++) {
-		if (m_subWidget[iii] != NULL) {
+		if (m_subWidget[iii] != nullptr) {
 			if (m_subWidget[iii]->getId() == _id) {
 				elementID = iii;
 				break;
@@ -137,12 +137,12 @@ void ewol::widget::WSlider::subWidgetSelectSet(int32_t _id) {
 }
 
 void ewol::widget::WSlider::subWidgetSelectSet(ewol::object::Shared<ewol::Widget> _widgetPointer) {
-	if (_widgetPointer == NULL) {
-		EWOL_ERROR("Can not change to a widget NULL");
+	if (_widgetPointer == nullptr) {
+		EWOL_ERROR("Can not change to a widget nullptr");
 		return;
 	}
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (m_subWidget[iii] != NULL) {
+		if (m_subWidget[iii] != nullptr) {
 			if (m_subWidget[iii] == _widgetPointer) {
 				subWidgetSelectSetVectorId(iii);
 				return;
@@ -158,7 +158,7 @@ void ewol::widget::WSlider::subWidgetSelectSet(const std::string& _widgetName) {
 		return;
 	}
 	for (size_t iii=0; iii<m_subWidget.size(); iii++) {
-		if (m_subWidget[iii] != NULL) {
+		if (m_subWidget[iii] != nullptr) {
 			if (m_subWidget[iii]->getName() == _widgetName) {
 				subWidgetSelectSetVectorId(iii);
 				return;
@@ -224,7 +224,7 @@ void ewol::widget::WSlider::systemDraw(const ewol::DrawProperty& _displayProp) {
 		//EWOL_DEBUG("Draw : " << m_windowsDestination);
 		int32_t iii = m_windowsDestination;
 		if (iii >= 0 || (size_t)iii < m_subWidget.size()) {
-			if (NULL != m_subWidget[iii]) {
+			if (nullptr != m_subWidget[iii]) {
 				m_subWidget[iii]->systemDraw(prop);
 			}
 		}
@@ -233,14 +233,14 @@ void ewol::widget::WSlider::systemDraw(const ewol::DrawProperty& _displayProp) {
 		// draw Sources :
 		int32_t iii = m_windowsSources;
 		if (iii >= 0 || (size_t)iii < m_subWidget.size()) {
-			if (NULL != m_subWidget[iii]) {
+			if (nullptr != m_subWidget[iii]) {
 				m_subWidget[iii]->systemDraw(prop);
 			}
 		}
 		// draw Destination : 
 		iii = m_windowsDestination;
 		if (iii >= 0 || (size_t)iii < m_subWidget.size()) {
-			if (NULL != m_subWidget[iii]) {
+			if (nullptr != m_subWidget[iii]) {
 				m_subWidget[iii]->systemDraw(prop);
 			}
 		}
@@ -251,20 +251,20 @@ void ewol::widget::WSlider::onRegenerateDisplay() {
 	if (m_windowsDestination == m_windowsSources) {
 		int32_t iii = m_windowsDestination;
 		if (iii >= 0 || (size_t)iii < m_subWidget.size()) {
-			if (NULL != m_subWidget[iii]) {
+			if (nullptr != m_subWidget[iii]) {
 				m_subWidget[iii]->onRegenerateDisplay();
 			}
 		}
 	} else {
 		int32_t iii = m_windowsSources;
 		if (iii >= 0 || (size_t)iii < m_subWidget.size()) {
-			if (NULL != m_subWidget[iii]) {
+			if (nullptr != m_subWidget[iii]) {
 				m_subWidget[iii]->onRegenerateDisplay();
 			}
 		}
 		iii = m_windowsDestination;
 		if (iii >= 0 || (size_t)iii < m_subWidget.size()) {
-			if (NULL != m_subWidget[iii]) {
+			if (nullptr != m_subWidget[iii]) {
 				m_subWidget[iii]->onRegenerateDisplay();
 			}
 		}
@@ -317,7 +317,7 @@ bool ewol::widget::WSlider::onGetConfig(const char* _config, std::string& _resul
 
 ewol::object::Shared<ewol::Widget> ewol::widget::WSlider::getWidgetAtPos(const vec2& _pos) {
 	if (true == isHide()) {
-		return NULL;
+		return nullptr;
 	}
 	if (m_windowsDestination == m_windowsSources) {
 		if (m_windowsDestination < (int64_t)m_subWidget.size()) {
@@ -327,10 +327,10 @@ ewol::object::Shared<ewol::Widget> ewol::widget::WSlider::getWidgetAtPos(const v
 			    && (tmpOrigin.y() <= _pos.y() && tmpOrigin.y() + tmpSize.y() >= _pos.y()) )
 			{
 				ewol::object::Shared<ewol::Widget> tmpWidget = m_subWidget[m_windowsDestination]->getWidgetAtPos(_pos);
-				if (NULL != tmpWidget) {
+				if (nullptr != tmpWidget) {
 					return tmpWidget;
 				}
-				return NULL;
+				return nullptr;
 			}
 		}
 	} else {
@@ -341,10 +341,10 @@ ewol::object::Shared<ewol::Widget> ewol::widget::WSlider::getWidgetAtPos(const v
 			    && (tmpOrigin.y() <= _pos.y() && tmpOrigin.y() + tmpSize.y() >= _pos.y()) )
 			{
 				ewol::object::Shared<ewol::Widget> tmpWidget = m_subWidget[m_windowsDestination]->getWidgetAtPos(_pos);
-				if (NULL != tmpWidget) {
+				if (nullptr != tmpWidget) {
 					return tmpWidget;
 				}
-				return NULL;
+				return nullptr;
 			}
 		}
 		if (m_windowsSources < (int64_t)m_subWidget.size()) {
@@ -354,13 +354,13 @@ ewol::object::Shared<ewol::Widget> ewol::widget::WSlider::getWidgetAtPos(const v
 			    && (tmpOrigin.y() <= _pos.y() && tmpOrigin.y() + tmpSize.y() >= _pos.y()) )
 			{
 				ewol::object::Shared<ewol::Widget> tmpWidget = m_subWidget[m_windowsSources]->getWidgetAtPos(_pos);
-				if (NULL != tmpWidget) {
+				if (nullptr != tmpWidget) {
 					return tmpWidget;
 				}
-				return NULL;
+				return nullptr;
 			}
 		}
 	}
-	return NULL;
+	return nullptr;
 }
 
diff --git a/sources/ewol/widget/Widget.cpp b/sources/ewol/widget/Widget.cpp
index 79f3fc59..7c5daa54 100644
--- a/sources/ewol/widget/Widget.cpp
+++ b/sources/ewol/widget/Widget.cpp
@@ -105,7 +105,7 @@ const char* const ewol::Widget::eventAnnimationRatio = "annimation-ratio";
 const char* const ewol::Widget::eventAnnimationStop = "annimation-stop";
 
 ewol::Widget::Widget() :
-  m_up(NULL),
+  m_up(nullptr),
   m_size(10,10),
   m_minSize(0,0),
   m_maxSize(vec2(ULTIMATE_MAX_SIZE,ULTIMATE_MAX_SIZE)),
@@ -129,23 +129,23 @@ ewol::Widget::Widget() :
   m_cursorDisplay(ewol::context::cursorArrow),
   m_annimationMode(annimationModeDisable),
   m_annimationratio(0.0f) {
-	m_annimationType[0] = NULL;
-	m_annimationType[1] = NULL;
+	m_annimationType[0] = nullptr;
+	m_annimationType[1] = nullptr;
 	m_annimationTime[0] = 0.1f; // annimation will be 100ms at the first state
 	m_annimationTime[1] = 0.1f; // annimation will be 100ms at the first state
 	addObjectType("ewol::object::Shared<ewol::Widget>");
 	// set all the config in the list :
-	registerConfig(ewol::Widget::configFill, "bvec2", NULL, "Fill the widget available size");
-	registerConfig(ewol::Widget::configExpand, "bvec2", NULL, "Request the widget Expand size wile space is available");
-	registerConfig(ewol::Widget::configHide, "bool", NULL, "The widget start hided");
-	registerConfig(ewol::Widget::configFocus, "bool", NULL, "The widget request focus");
-	registerConfig(ewol::Widget::configMinSize, "dimension", NULL, "User minimum size");
-	registerConfig(ewol::Widget::configMaxSize, "dimension", NULL, "User maximum size");
+	registerConfig(ewol::Widget::configFill, "bvec2", nullptr, "Fill the widget available size");
+	registerConfig(ewol::Widget::configExpand, "bvec2", nullptr, "Request the widget Expand size wile space is available");
+	registerConfig(ewol::Widget::configHide, "bool", nullptr, "The widget start hided");
+	registerConfig(ewol::Widget::configFocus, "bool", nullptr, "The widget request focus");
+	registerConfig(ewol::Widget::configMinSize, "dimension", nullptr, "User minimum size");
+	registerConfig(ewol::Widget::configMaxSize, "dimension", nullptr, "User maximum size");
 	registerConfig(ewol::Widget::configGravity, "list", "center;top-left;top;top-right;right;buttom-right;buttom;buttom-left;left", "User maximum size");
-	registerConfig(ewol::Widget::configAnnimationAddType, "list", NULL /* no control */, "Annimation type, when adding/show a widget");
-	registerConfig(ewol::Widget::configAnnimationAddTime, "float", NULL /* no control */, "Annimation time in second, when adding/show a widget");
-	registerConfig(ewol::Widget::configAnnimationRemoveType, "list", NULL /* no control */, "Annimation type, when removing/hide a widget");
-	registerConfig(ewol::Widget::configAnnimationRemoveTime, "float", NULL /* no control */, "Annimation time in second, when removing/hide a widget");
+	registerConfig(ewol::Widget::configAnnimationAddType, "list", nullptr /* no control */, "Annimation type, when adding/show a widget");
+	registerConfig(ewol::Widget::configAnnimationAddTime, "float", nullptr /* no control */, "Annimation time in second, when adding/show a widget");
+	registerConfig(ewol::Widget::configAnnimationRemoveType, "list", nullptr /* no control */, "Annimation type, when removing/hide a widget");
+	registerConfig(ewol::Widget::configAnnimationRemoveTime, "float", nullptr /* no control */, "Annimation time in second, when removing/hide a widget");
 	addEventId(eventAnnimationStart);
 	addEventId(eventAnnimationRatio);
 	addEventId(eventAnnimationStop);
@@ -544,13 +544,13 @@ void ewol::Widget::shortCutAdd(const char * _descriptiveString,
                                const char * _generateEventId,
                                std::string _data,
                                bool _broadcast) {
-	if (    _descriptiveString == NULL
+	if (    _descriptiveString == nullptr
 	     || strlen(_descriptiveString) == 0) {
 		EWOL_ERROR("try to add shortcut with no descriptive string ...");
 		return;
 	}
 	EventShortCut* tmpElement = new EventShortCut();
-	if (NULL == tmpElement) {
+	if (nullptr == tmpElement) {
 		EWOL_ERROR("allocation error ... Memory error ...");
 		return;
 	}
@@ -560,74 +560,74 @@ void ewol::Widget::shortCutAdd(const char * _descriptiveString,
 	// parsing of the string :
 	//"ctrl+shift+alt+meta+s"
 	const char * tmp = strstr(_descriptiveString, "ctrl");
-	if(NULL != tmp) {
+	if(nullptr != tmp) {
 		tmpElement->specialKey.setCtrl(true);
 	}
 	tmp = strstr(_descriptiveString, "shift");
-	if(NULL != tmp) {
+	if(nullptr != tmp) {
 		tmpElement->specialKey.setShift(true);
 	}
 	tmp = strstr(_descriptiveString, "alt");
-	if(NULL != tmp) {
+	if(nullptr != tmp) {
 		tmpElement->specialKey.setAlt(true);
 	}
 	tmp = strstr(_descriptiveString, "meta");
-	if(NULL != tmp) {
+	if(nullptr != tmp) {
 		tmpElement->specialKey.setMeta(true);
 	}
-	if(NULL != strstr(_descriptiveString, "F12") ) {
+	if(nullptr != strstr(_descriptiveString, "F12") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardF12;
-	} else if(NULL != strstr(_descriptiveString, "F11") ) {
+	} else if(nullptr != strstr(_descriptiveString, "F11") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardF11;
-	} else if(NULL != strstr(_descriptiveString, "F10") ) {
+	} else if(nullptr != strstr(_descriptiveString, "F10") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardF10;
-	} else if(NULL != strstr(_descriptiveString, "F9") ) {
+	} else if(nullptr != strstr(_descriptiveString, "F9") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardF9;
-	} else if(NULL != strstr(_descriptiveString, "F8") ) {
+	} else if(nullptr != strstr(_descriptiveString, "F8") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardF8;
-	} else if(NULL != strstr(_descriptiveString, "F7") ) {
+	} else if(nullptr != strstr(_descriptiveString, "F7") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardF7;
-	} else if(NULL != strstr(_descriptiveString, "F6") ) {
+	} else if(nullptr != strstr(_descriptiveString, "F6") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardF6;
-	} else if(NULL != strstr(_descriptiveString, "F5") ) {
+	} else if(nullptr != strstr(_descriptiveString, "F5") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardF5;
-	} else if(NULL != strstr(_descriptiveString, "F4") ) {
+	} else if(nullptr != strstr(_descriptiveString, "F4") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardF4;
-	} else if(NULL != strstr(_descriptiveString, "F3") ) {
+	} else if(nullptr != strstr(_descriptiveString, "F3") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardF3;
-	} else if(NULL != strstr(_descriptiveString, "F2") ) {
+	} else if(nullptr != strstr(_descriptiveString, "F2") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardF2;
-	} else if(NULL != strstr(_descriptiveString, "F1") ) {
+	} else if(nullptr != strstr(_descriptiveString, "F1") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardF1;
-	} else if(NULL != strstr(_descriptiveString, "LEFT") ) {
+	} else if(nullptr != strstr(_descriptiveString, "LEFT") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardLeft;
-	} else if(NULL != strstr(_descriptiveString, "RIGHT") ) {
+	} else if(nullptr != strstr(_descriptiveString, "RIGHT") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardRight;
-	} else if(NULL != strstr(_descriptiveString, "UP") ) {
+	} else if(nullptr != strstr(_descriptiveString, "UP") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardUp;
-	} else if(NULL != strstr(_descriptiveString, "DOWN") ) {
+	} else if(nullptr != strstr(_descriptiveString, "DOWN") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardDown;
-	} else if(NULL != strstr(_descriptiveString, "PAGE_UP") ) {
+	} else if(nullptr != strstr(_descriptiveString, "PAGE_UP") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardPageUp;
-	} else if(NULL != strstr(_descriptiveString, "PAGE_DOWN") ) {
+	} else if(nullptr != strstr(_descriptiveString, "PAGE_DOWN") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardPageDown;
-	} else if(NULL != strstr(_descriptiveString, "START") ) {
+	} else if(nullptr != strstr(_descriptiveString, "START") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardStart;
-	} else if(NULL != strstr(_descriptiveString, "END") ) {
+	} else if(nullptr != strstr(_descriptiveString, "END") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardEnd;
-	} else if(NULL != strstr(_descriptiveString, "PRINT") ) {
+	} else if(nullptr != strstr(_descriptiveString, "PRINT") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardPrint;
-	} else if(NULL != strstr(_descriptiveString, "ARRET_DEFIL") ) {
+	} else if(nullptr != strstr(_descriptiveString, "ARRET_DEFIL") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardStopDefil;
-	} else if(NULL != strstr(_descriptiveString, "WAIT") ) {
+	} else if(nullptr != strstr(_descriptiveString, "WAIT") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardWait;
-	} else if(NULL != strstr(_descriptiveString, "INSERT") ) {
+	} else if(nullptr != strstr(_descriptiveString, "INSERT") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardInsert;
-	} else if(NULL != strstr(_descriptiveString, "CAPLOCK") ) {
+	} else if(nullptr != strstr(_descriptiveString, "CAPLOCK") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardCapLock;
-	} else if(NULL != strstr(_descriptiveString, "CONTEXT_MENU") ) {
+	} else if(nullptr != strstr(_descriptiveString, "CONTEXT_MENU") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardContextMenu;
-	} else if(NULL != strstr(_descriptiveString, "NUM_LOCK") ) {
+	} else if(nullptr != strstr(_descriptiveString, "NUM_LOCK") ) {
 		tmpElement->keyboardMoveValue = ewol::key::keyboardNumLock;
 	} else {
 		tmpElement->unicodeValue = _descriptiveString[strlen(_descriptiveString) -1];
@@ -638,9 +638,9 @@ void ewol::Widget::shortCutAdd(const char * _descriptiveString,
 
 void ewol::Widget::shortCutClean() {
 	for (size_t iii=0; iii<m_localShortcut.size(); iii++) {
-		if (NULL != m_localShortcut[iii]) {
+		if (nullptr != m_localShortcut[iii]) {
 			delete(m_localShortcut[iii]);
-			m_localShortcut[iii]=NULL;
+			m_localShortcut[iii]=nullptr;
 		}
 	}
 	m_localShortcut.clear();
@@ -655,7 +655,7 @@ bool ewol::Widget::onEventShortCut(ewol::key::Special& _special,
 	}
 	//EWOL_INFO("Try to find generic shortcut ...");
 	for(int32_t iii=m_localShortcut.size()-1; iii >= 0; iii--) {
-		if(NULL != m_localShortcut[iii]) {
+		if(nullptr != m_localShortcut[iii]) {
 			if(    m_localShortcut[iii]->specialKey.getShift() == _special.getShift()
 			    && m_localShortcut[iii]->specialKey.getCtrl()  == _special.getCtrl()
 			    && m_localShortcut[iii]->specialKey.getAlt()   == _special.getAlt()
@@ -722,11 +722,11 @@ ewol::object::Shared<ewol::Widget> ewol::Widget::getWidgetNamed(const std::strin
 	if (getName() == _widgetName) {
 		return this;
 	}
-	return NULL;
+	return nullptr;
 }
 
 bool ewol::Widget::systemEventEntry(ewol::event::EntrySystem& _event) {
-	if (NULL != m_up) {
+	if (nullptr != m_up) {
 		if (true == m_up->systemEventEntry(_event)) {
 			return true;
 		}
@@ -735,7 +735,7 @@ bool ewol::Widget::systemEventEntry(ewol::event::EntrySystem& _event) {
 }
 
 bool ewol::Widget::systemEventInput(ewol::event::InputSystem& _event) {
-	if (NULL != m_up) {
+	if (nullptr != m_up) {
 		if (true == m_up->systemEventInput(_event)) {
 			return true;
 		}
@@ -837,7 +837,7 @@ bool ewol::Widget::onGetConfig(const char* _config, std::string& _result) const
 	}
 	if (_config == ewol::Widget::configAnnimationAddType) {
 		const char* type = m_annimationType[ewol::Widget::annimationModeEnableAdd];
-		if (type == NULL) {
+		if (type == nullptr) {
 			_result = "";
 		} else {
 			_result = type;
@@ -850,7 +850,7 @@ bool ewol::Widget::onGetConfig(const char* _config, std::string& _result) const
 	}
 	if (_config == ewol::Widget::configAnnimationRemoveType) {
 		const char* type = m_annimationType[ewol::Widget::annimationModeEnableRemove];
-		if (type == NULL) {
+		if (type == nullptr) {
 			_result = "";
 		} else {
 			_result = type;
diff --git a/sources/ewol/widget/Widget.h b/sources/ewol/widget/Widget.h
index f1e27e3c..7c2cd74a 100644
--- a/sources/ewol/widget/Widget.h
+++ b/sources/ewol/widget/Widget.h
@@ -101,7 +101,7 @@ namespace ewol {
 			enum ewol::key::keyboard keyboardMoveValue; //!< ewol::EVENT_KB_MOVE_TYPE_NONE if not used
 			EventShortCut() {
 				broadcastEvent = false;
-				generateEventId = NULL;
+				generateEventId = nullptr;
 				eventData = "";
 				unicodeValue = 0;
 				keyboardMoveValue = ewol::key::keyboardUnknow;
@@ -144,18 +144,18 @@ namespace ewol {
 		public:
 			/**
 			 * @brief set the upper widget of this widget.
-			 * @param[in] _upper Father widget (only keep the last and write error if a previous was set)  == > disable with NULL.
+			 * @param[in] _upper Father widget (only keep the last and write error if a previous was set)  == > disable with nullptr.
 			 */
 			void setUpperWidget(ewol::object::Shared<ewol::Widget> _upper);
 			/**
 			 * @brief remove the upper widget of this widget.
 			 */
 			void removeUpperWidget() {
-				setUpperWidget(NULL);
+				setUpperWidget(nullptr);
 			};
 			/**
 			 * @brief get the upper widget (father).
-			 * @ return the requested widget (if NULL , 2 case : root widget or error implementation).
+			 * @ return the requested widget (if nullptr , 2 case : root widget or error implementation).
 			 */
 			ewol::object::Shared<ewol::Widget> getUpperWidget() {
 				return m_up;
@@ -528,7 +528,7 @@ namespace ewol {
 			/**
 			 * @brief get the widget at the specific windows absolute position
 			 * @param[in] _pos gAbsolute position of the requested widget knowledge
-			 * @return NULL No widget found
+			 * @return nullptr No widget found
 			 * @return pointer on the widget found
 			 * @note : INTERNAL EWOL SYSTEM
 			 */
@@ -536,12 +536,12 @@ namespace ewol {
 				if (false == isHide()) {
 					return this;
 				}
-				return NULL;
+				return nullptr;
 			};
 			/**
 			 * @brief get the widget if it have this name or one of the subwidget with the same name
 			 * @param[in] _widgetName name of the widget
-			 * @return the requested pointer on the node (or NULL pointer)
+			 * @return the requested pointer on the node (or nullptr pointer)
 			 */
 			virtual ewol::object::Shared<ewol::Widget> getWidgetNamed(const std::string& _widgetName);
 		
@@ -741,7 +741,7 @@ namespace ewol {
 		private:
 			std::vector<const char*> m_annimationList[2]; //!< List of all annimation type ADD
 		protected:
-			const char* m_annimationType[2]; //!< type of start annimation (default NULL ==> no annimation)
+			const char* m_annimationType[2]; //!< type of start annimation (default nullptr ==> no annimation)
 			float m_annimationTime[2]; //!< time to produce start annimation
 		protected:
 			/**
diff --git a/sources/ewol/widget/Windows.cpp b/sources/ewol/widget/Windows.cpp
index 445e044e..57e412b1 100644
--- a/sources/ewol/widget/Windows.cpp
+++ b/sources/ewol/widget/Windows.cpp
@@ -24,14 +24,14 @@ extern const char * const ewolEventWindowsHideKeyboard   = "ewol Windows hideKey
 
 
 ewol::widget::Windows::Windows() :
-  m_colorProperty(NULL),
+  m_colorProperty(nullptr),
   m_colorBg(-1) {
 	addObjectType("ewol::widget::Windows");
 	setCanHaveFocus(true);
-	m_subWidget = NULL;
+	m_subWidget = nullptr;
 	setDecorationDisable();
 	m_colorProperty = ewol::resource::ColorFile::keep("THEME:COLOR:Windows.json");
-	if (m_colorProperty != NULL) {
+	if (m_colorProperty != nullptr) {
 		m_colorBg = m_colorProperty->request("background");
 	}
 	//KeyboardShow(KEYBOARD_MODE_CODE);
@@ -45,14 +45,14 @@ ewol::widget::Windows::~Windows() {
 void ewol::widget::Windows::calculateSize(const vec2& _availlable) {
 	//EWOL_DEBUG(" _availlable : " << _availlable);
 	m_size = _availlable;
-	if (NULL != m_subWidget) {
+	if (nullptr != m_subWidget) {
 		m_subWidget->calculateMinMaxSize();
 		// TODO : Check if min size is possible ...
 		// TODO : Herited from MinSize .. and expand ???
 		m_subWidget->calculateSize(m_size);
 	}
 	for (size_t iii=0; iii<m_popUpWidgetList.size(); iii++) {
-		if (NULL != m_popUpWidgetList[iii]) {
+		if (nullptr != m_popUpWidgetList[iii]) {
 			m_popUpWidgetList[iii]->calculateMinMaxSize();
 			m_popUpWidgetList[iii]->calculateSize(m_size);
 		}
@@ -64,13 +64,13 @@ ewol::object::Shared<ewol::Widget> ewol::widget::Windows::getWidgetAtPos(const v
 	vec2 relativePos = relativePosition(_pos);
 	// event go directly on the pop-up
 	if (0 < m_popUpWidgetList.size()) {
-		if (NULL == m_popUpWidgetList[m_popUpWidgetList.size()-1]) {
+		if (nullptr == m_popUpWidgetList[m_popUpWidgetList.size()-1]) {
 			m_popUpWidgetList.pop_back();
 		} else {
 			return m_popUpWidgetList[m_popUpWidgetList.size()-1]->getWidgetAtPos(_pos);
 		}
 	// otherwise in the normal windows
-	} else if (NULL != m_subWidget) {
+	} else if (nullptr != m_subWidget) {
 		return m_subWidget->getWidgetAtPos(_pos);
 	}
 	// otherwise the event go to this widget ...
@@ -110,11 +110,11 @@ void ewol::widget::Windows::sysDraw() {
 }
 
 void ewol::widget::Windows::onRegenerateDisplay() {
-	if (NULL != m_subWidget) {
+	if (nullptr != m_subWidget) {
 		m_subWidget->onRegenerateDisplay();
 	}
 	for (size_t iii=0; iii<m_popUpWidgetList.size(); iii++) {
-		if (NULL != m_popUpWidgetList[iii]) {
+		if (nullptr != m_popUpWidgetList[iii]) {
 			m_popUpWidgetList[iii]->onRegenerateDisplay();
 		}
 	}
@@ -130,7 +130,7 @@ void ewol::widget::Windows::systemDraw(const ewol::DrawProperty& _displayProp) {
 	
 	// clear the screen with transparency ...
 	etk::Color<float> colorBg(0.5, 0.5, 0.5, 0.5);
-	if (m_colorProperty != NULL) {
+	if (m_colorProperty != nullptr) {
 		colorBg = m_colorProperty->get(m_colorBg);
 	}
 	glClearColor(colorBg.r(), colorBg.g(), colorBg.b(), colorBg.a());
@@ -143,7 +143,7 @@ void ewol::widget::Windows::systemDraw(const ewol::DrawProperty& _displayProp) {
 	#endif
 	//EWOL_WARNING(" WINDOWS draw on " << m_currentDrawId);
 	// first display the windows on the display
-	if (NULL != m_subWidget) {
+	if (nullptr != m_subWidget) {
 		m_subWidget->systemDraw(_displayProp);
 		//EWOL_DEBUG("Draw Windows");
 	}
@@ -155,7 +155,7 @@ void ewol::widget::Windows::systemDraw(const ewol::DrawProperty& _displayProp) {
 	#endif
 	// second display the pop-up
 	for (size_t iii=0; iii<m_popUpWidgetList.size(); iii++) {
-		if (NULL != m_popUpWidgetList[iii]) {
+		if (nullptr != m_popUpWidgetList[iii]) {
 			m_popUpWidgetList[iii]->systemDraw(_displayProp);
 			//EWOL_DEBUG("Draw Pop-up");
 		}
@@ -167,7 +167,7 @@ void ewol::widget::Windows::systemDraw(const ewol::DrawProperty& _displayProp) {
 }
 
 void ewol::widget::Windows::setSubWidget(ewol::object::Shared<ewol::Widget> _widget) {
-	if (m_subWidget != NULL) {
+	if (m_subWidget != nullptr) {
 		EWOL_INFO("Remove current main windows Widget...");
 		m_subWidget.reset();
 	}
@@ -177,7 +177,7 @@ void ewol::widget::Windows::setSubWidget(ewol::object::Shared<ewol::Widget> _wid
 }
 
 void ewol::widget::Windows::popUpWidgetPush(ewol::object::Shared<ewol::Widget> _widget) {
-	if (_widget == NULL) {
+	if (_widget == nullptr) {
 		// nothing to do an error appear :
 		EWOL_ERROR("can not set widget pop-up (null pointer)");
 		return;
@@ -196,7 +196,7 @@ void ewol::widget::Windows::popUpWidgetPop() {
 		return;
 	}
 	ewol::object::Shared<ewol::Widget> widget = m_popUpWidgetList[m_popUpWidgetList.size()-1];
-	if (widget == NULL) {
+	if (widget == nullptr) {
 		return;
 	}
 	widget->removeObject();
@@ -209,12 +209,12 @@ void ewol::widget::Windows::onObjectRemove(ewol::object::Shared<ewol::Object> _r
 	
 	if (m_subWidget == _removeObject) {
 		EWOL_DEBUG("Remove main element of the windows  == > destroyed object");
-		m_subWidget = NULL;
+		m_subWidget = nullptr;
 	}
 	for(int32_t iii=m_popUpWidgetList.size()-1; iii >= 0; --iii) {
 		if(m_popUpWidgetList[iii] == _removeObject) {
 			EWOL_DEBUG("Remove Pop-up [" << iii << "] element of the windows  == > destroyed object");
-			m_popUpWidgetList[iii] = NULL;
+			m_popUpWidgetList[iii] = nullptr;
 			m_popUpWidgetList.erase(m_popUpWidgetList.begin()+iii);
 		}
 	}
@@ -237,7 +237,7 @@ void ewol::widget::Windows::setTitle(const std::string& _title) {
 void ewol::widget::Windows::createPopUpMessage(enum popUpMessageType _type, const std::string& _message)
 {
 	ewol::widget::StdPopUp* tmpPopUp = new widget::StdPopUp();
-	if (tmpPopUp == NULL) {
+	if (tmpPopUp == nullptr) {
 		EWOL_ERROR("Can not create a simple pop-up");
 		return;
 	}
diff --git a/sources/ewol/widget/meta/ColorChooser.cpp b/sources/ewol/widget/meta/ColorChooser.cpp
index bdb06fee..235620ab 100644
--- a/sources/ewol/widget/meta/ColorChooser.cpp
+++ b/sources/ewol/widget/meta/ColorChooser.cpp
@@ -34,11 +34,11 @@ ewol::widget::ColorChooser::ColorChooser() :
   ewol::widget::Sizer(ewol::widget::Sizer::modeVert) {
 	addObjectType("ewol::widget::ColorChooser");
 	addEventId(eventChange);
-	m_widgetColorBar = NULL;
-	m_widgetRed = NULL;
-	m_widgetGreen = NULL;
-	m_widgetBlue = NULL;
-	m_widgetAlpha = NULL;
+	m_widgetColorBar = nullptr;
+	m_widgetRed = nullptr;
+	m_widgetGreen = nullptr;
+	m_widgetBlue = nullptr;
+	m_widgetAlpha = nullptr;
 	lockExpand(bvec2(true,true));
 		m_widgetColorBar = new ewol::widget::ColorBar();
 			m_widgetColorBar->registerOnEvent(this, "change", eventColorBarHasChange);
@@ -98,19 +98,19 @@ ewol::widget::ColorChooser::~ColorChooser() {
 
 void ewol::widget::ColorChooser::setColor(etk::Color<> _newColor) {
 	m_currentColor = _newColor;
-	if (NULL != m_widgetRed) {
+	if (nullptr != m_widgetRed) {
 		m_widgetRed->setValue(m_currentColor.r());
 	}
-	if (NULL != m_widgetGreen) {
+	if (nullptr != m_widgetGreen) {
 		m_widgetGreen->setValue(m_currentColor.g());
 	}
-	if (NULL != m_widgetBlue) {
+	if (nullptr != m_widgetBlue) {
 		m_widgetBlue->setValue(m_currentColor.b());
 	}
-	if (NULL != m_widgetAlpha) {
+	if (nullptr != m_widgetAlpha) {
 		m_widgetAlpha->setValue(m_currentColor.a());
 	}
-	if (NULL != m_widgetColorBar) {
+	if (nullptr != m_widgetColorBar) {
 		m_widgetColorBar->setCurrentColor(m_currentColor);
 	}
 }
@@ -122,7 +122,7 @@ etk::Color<> ewol::widget::ColorChooser::getColor() {
 
 
 void ewol::widget::ColorChooser::onReceiveMessage(const ewol::object::Message& _msg) {
-	if (NULL == _msg.getCaller()) {
+	if (nullptr == _msg.getCaller()) {
 		return;
 	}
 	//EWOL_INFO("Receive Extern Event ... : widgetPointer=" << CallerObject << "\"" << eventId << "\"  == > data=\"" << data << "\"" );
@@ -130,20 +130,20 @@ void ewol::widget::ColorChooser::onReceiveMessage(const ewol::object::Message& _
 		// == > colorBar has change ...
 		uint8_t tmpAlpha = m_currentColor.a();
 		// the colorbar has no notion of the alpha  == > keep it ...
-		if (NULL != m_widgetColorBar) {
+		if (nullptr != m_widgetColorBar) {
 			m_currentColor = m_widgetColorBar->getCurrentColor();
 		}
 		m_currentColor.setA(tmpAlpha);
-		if (NULL != m_widgetRed) {
+		if (nullptr != m_widgetRed) {
 			m_widgetRed->setValue(m_currentColor.r());
 		}
-		if (NULL != m_widgetGreen) {
+		if (nullptr != m_widgetGreen) {
 			m_widgetGreen->setValue(m_currentColor.g());
 		}
-		if (NULL != m_widgetBlue) {
+		if (nullptr != m_widgetBlue) {
 			m_widgetBlue->setValue(m_currentColor.b());
 		}
-		if (NULL != m_widgetAlpha) {
+		if (nullptr != m_widgetAlpha) {
 			m_widgetAlpha->setValue(m_currentColor.a());
 		}
 		generateEventId(eventChange, m_currentColor.getString());
@@ -161,7 +161,7 @@ void ewol::widget::ColorChooser::onReceiveMessage(const ewol::object::Message& _
 		if (_msg.getCaller() == m_widgetAlpha) {
 			m_currentColor.setA(m_widgetAlpha->getValue());
 		}
-		if (NULL != m_widgetColorBar) {
+		if (nullptr != m_widgetColorBar) {
 			m_widgetColorBar->setCurrentColor(m_currentColor);
 		}
 		generateEventId(eventChange, m_currentColor.getString());
diff --git a/sources/ewol/widget/meta/FileChooser.h b/sources/ewol/widget/meta/FileChooser.h
index 014a4b97..ca295183 100644
--- a/sources/ewol/widget/meta/FileChooser.h
+++ b/sources/ewol/widget/meta/FileChooser.h
@@ -30,7 +30,7 @@ namespace ewol {
 		 *  The first step is to create the file chooser pop-up :
 		 *  [code style=c++]
 		 *  ewol::widget::FileChooser* tmpWidget = new ewol::Widget::FileChooser();
-		 *  if (tmpWidget == NULL) {
+		 *  if (tmpWidget == nullptr) {
 		 *  	APPL_ERROR("Can not open File chooser !!! ");
 		 *  	return -1;
 		 *  }
@@ -46,7 +46,7 @@ namespace ewol {
 		 *  //tmpWidget->setFolder("/home/me");
 		 *  // add the widget as windows pop-up ...
 		 *  ewol::widget::Windows* tmpWindows = getWindows();
-		 *  if (tmpWindows == NULL) {
+		 *  if (tmpWindows == nullptr) {
 		 *  	APPL_ERROR("Can not get the current windows !!! ");
 		 *  	return -1;
 		 *  }
diff --git a/sources/ewol/widget/meta/Parameter.cpp b/sources/ewol/widget/meta/Parameter.cpp
index db1c5fb9..72a78fd1 100644
--- a/sources/ewol/widget/meta/Parameter.cpp
+++ b/sources/ewol/widget/meta/Parameter.cpp
@@ -29,14 +29,14 @@ static const char * const l_eventMenuSelected = "local-event-menu-selected";
 
 ewol::widget::Parameter::Parameter() :
   m_currentIdList(0),
-  m_widgetTitle(NULL),
-  m_paramList(NULL) {
+  m_widgetTitle(nullptr),
+  m_paramList(nullptr) {
 	addObjectType("ewol::widget::Parameter");
 	addEventId(eventClose);
 	
-	ewol::widget::Sizer * mySizerVert = NULL;
-	ewol::widget::Sizer * mySizerHori = NULL;
-	ewol::widget::Spacer * mySpacer = NULL;
+	ewol::widget::Sizer * mySizerVert = nullptr;
+	ewol::widget::Sizer * mySizerHori = nullptr;
+	ewol::widget::Spacer * mySpacer = nullptr;
 	#ifdef __TARGET_OS__Android
 		setMinSize(ewol::Dimension(vec2(90, 90), ewol::Dimension::Pourcent));
 	#else
@@ -44,7 +44,7 @@ ewol::widget::Parameter::Parameter() :
 	#endif
 	
 	mySizerVert = new ewol::widget::Sizer(widget::Sizer::modeVert);
-	if (NULL == mySizerVert) {
+	if (nullptr == mySizerVert) {
 		EWOL_ERROR("Can not allocate widget  == > display might be in error");
 	} else {
 		EWOL_INFO("add widget");
@@ -54,13 +54,13 @@ ewol::widget::Parameter::Parameter() :
 		setSubWidget(mySizerVert);
 		
 		mySizerHori = new ewol::widget::Sizer(widget::Sizer::modeHori);
-		if (NULL == mySizerHori) {
+		if (nullptr == mySizerHori) {
 			EWOL_ERROR("Can not allocate widget  == > display might be in error");
 		} else {
 			mySizerVert->subWidgetAdd(mySizerHori);
 			
 			mySpacer = new ewol::widget::Spacer();
-			if (NULL == mySpacer) {
+			if (nullptr == mySpacer) {
 				EWOL_ERROR("Can not allocate widget  == > display might be in error");
 			} else {
 				mySpacer->setExpand(bvec2(true,false));
@@ -68,7 +68,7 @@ ewol::widget::Parameter::Parameter() :
 			}
 			
 			ewol::widget::Button* tmpButton = new widget::Button();
-			if (NULL == tmpButton) {
+			if (nullptr == tmpButton) {
 				EWOL_ERROR("Can not allocate widget  == > display might be in error");
 			} else {
 				tmpButton->setSubWidget(
@@ -84,7 +84,7 @@ ewol::widget::Parameter::Parameter() :
 			}
 			
 			mySpacer = new ewol::widget::Spacer();
-			if (NULL == mySpacer) {
+			if (nullptr == mySpacer) {
 				EWOL_ERROR("Can not allocate widget  == > display might be in error");
 			} else {
 				mySpacer->setExpand(bvec2(false,false));
@@ -93,7 +93,7 @@ ewol::widget::Parameter::Parameter() :
 			}
 			
 			tmpButton = new ewol::widget::Button();
-			if (NULL == tmpButton) {
+			if (nullptr == tmpButton) {
 				EWOL_ERROR("Can not allocate widget  == > display might be in error");
 			} else {
 				tmpButton->setSubWidget(
@@ -110,13 +110,13 @@ ewol::widget::Parameter::Parameter() :
 		}
 		
 		mySizerHori = new ewol::widget::Sizer(widget::Sizer::modeHori);
-		if (NULL == mySizerHori) {
+		if (nullptr == mySizerHori) {
 			EWOL_ERROR("Can not allocate widget  == > display might be in error");
 		} else {
 			mySizerVert->subWidgetAdd(mySizerHori);
 			
 			m_paramList = new ewol::widget::ParameterList();
-			if (NULL == m_paramList) {
+			if (nullptr == m_paramList) {
 				EWOL_ERROR("Can not allocate widget  == > display might be in error");
 			} else {
 			
@@ -126,7 +126,7 @@ ewol::widget::Parameter::Parameter() :
 				mySizerHori->subWidgetAdd(m_paramList.get());
 			}
 			mySpacer = new ewol::widget::Spacer();
-			if (NULL == mySpacer) {
+			if (nullptr == mySpacer) {
 				EWOL_ERROR("Can not allocate widget  == > display might be in error");
 			} else {
 				mySpacer->setFill(bvec2(false,true));
@@ -136,13 +136,13 @@ ewol::widget::Parameter::Parameter() :
 			}
 			
 			ewol::widget::Sizer * mySizerVert2 = new widget::Sizer(widget::Sizer::modeVert);
-			if (NULL == mySizerVert2) {
+			if (nullptr == mySizerVert2) {
 				EWOL_ERROR("Can not allocate widget  == > display might be in error");
 			} else {
 				mySizerHori->subWidgetAdd(mySizerVert2);
 				
 				mySpacer = new ewol::widget::Spacer();
-				if (NULL == mySpacer) {
+				if (nullptr == mySpacer) {
 					EWOL_ERROR("Can not allocate widget  == > display might be in error");
 				} else {
 					mySpacer->setExpand(bvec2(true,false));
@@ -152,7 +152,7 @@ ewol::widget::Parameter::Parameter() :
 				}
 				
 				m_wSlider = new ewol::widget::WSlider();
-				if (NULL == m_wSlider) {
+				if (nullptr == m_wSlider) {
 					EWOL_ERROR("Can not allocate widget  == > display might be in error");
 				} else {
 					m_wSlider->setTransitionSpeed(0.5);
@@ -164,7 +164,7 @@ ewol::widget::Parameter::Parameter() :
 		}
 		
 		mySpacer = new ewol::widget::Spacer();
-		if (NULL == mySpacer) {
+		if (nullptr == mySpacer) {
 			EWOL_ERROR("Can not allocate widget  == > display might be in error");
 		} else {
 			mySpacer->setExpand(bvec2(true,false));
@@ -174,7 +174,7 @@ ewol::widget::Parameter::Parameter() :
 		}
 		
 		m_widgetTitle = new ewol::widget::Label("File chooser ...");
-		if (NULL == m_widgetTitle) {
+		if (nullptr == m_widgetTitle) {
 			EWOL_ERROR("Can not allocate widget  == > display might be in error");
 		} else {
 			m_widgetTitle->setExpand(bvec2(true,false));
@@ -189,7 +189,7 @@ ewol::widget::Parameter::~Parameter() {
 }
 
 void ewol::widget::Parameter::setTitle(std::string _label) {
-	if (NULL == m_widgetTitle) {
+	if (nullptr == m_widgetTitle) {
 		return;
 	}
 	m_widgetTitle->setLabel(_label);
@@ -207,7 +207,7 @@ void ewol::widget::Parameter::onReceiveMessage(const ewol::object::Message& _msg
 		//ewol::userConfig::Save();
 		EWOL_TODO("Save Parameter !!! ");
 	} else if (_msg.getMessage() == l_eventMenuSelected) {
-		if (NULL != m_wSlider) {
+		if (nullptr != m_wSlider) {
 			int32_t value = 0;
 			sscanf(_msg.getData().c_str(), "%d", &value);
 			EWOL_DEBUG("event on the parameter : " << _msg.getMessage() << " select ID=" << value << "");
@@ -222,26 +222,26 @@ void ewol::widget::Parameter::onObjectRemove(ewol::object::Shared<ewol::Object>
 	ewol::widget::PopUp::onObjectRemove(_removeObject);
 	// second step find if in all the elements ...
 	if(_removeObject == m_widgetTitle) {
-		m_widgetTitle = NULL;
+		m_widgetTitle = nullptr;
 	}
 	if(_removeObject == m_paramList) {
-		m_paramList = NULL;
+		m_paramList = nullptr;
 	}
 	if(_removeObject == m_wSlider) {
-		m_wSlider = NULL;
+		m_wSlider = nullptr;
 	}
 }
 
 void ewol::widget::Parameter::menuAdd(std::string _label, std::string _image, ewol::object::Shared<ewol::Widget> _associateWidget) {
-	if (NULL != m_paramList) {
+	if (nullptr != m_paramList) {
 		m_paramList->menuAdd(_label, m_currentIdList, _image);
-		if (NULL != m_wSlider) {
-			if (NULL != _associateWidget) {
+		if (nullptr != m_wSlider) {
+			if (nullptr != _associateWidget) {
 				m_wSlider->subWidgetAdd(_associateWidget);
 			} else { 
 				EWOL_DEBUG("Associate an empty widget on it ...");
 				ewol::widget::Label * myLabel = new widget::Label((std::string("No widget for : ") + _label));
-				if (NULL == myLabel) {
+				if (nullptr == myLabel) {
 					EWOL_ERROR("Can not allocate widget  == > display might be in error");
 				} else {
 					myLabel->setExpand(bvec2(true,true));
@@ -256,21 +256,21 @@ void ewol::widget::Parameter::menuAdd(std::string _label, std::string _image, ew
 	}
 }
 void ewol::widget::Parameter::menuAddGroup(std::string _label) {
-	if (NULL != m_paramList) {
+	if (nullptr != m_paramList) {
 		m_paramList->menuSeparator();
 		m_paramList->menuAddGroup(_label);
 	}
 }
 
 void ewol::widget::Parameter::menuClear() {
-	if (NULL != m_paramList) {
+	if (nullptr != m_paramList) {
 		m_paramList->menuClear();
 		m_currentIdList = 0;
 	}
 }
 
 void ewol::widget::Parameter::menuSeparator() {
-	if (NULL != m_paramList) {
+	if (nullptr != m_paramList) {
 		m_paramList->menuSeparator();
 	}
 }
diff --git a/sources/ewol/widget/meta/ParameterList.cpp b/sources/ewol/widget/meta/ParameterList.cpp
index 7cec54f5..c50ece50 100644
--- a/sources/ewol/widget/meta/ParameterList.cpp
+++ b/sources/ewol/widget/meta/ParameterList.cpp
@@ -39,7 +39,7 @@ ewol::widget::ParameterList::~ParameterList() {
 	//clean all the object
 	for (size_t iii=0; iii<m_listOObject.size(); iii++) {
 		delete(m_listOObject[iii]);
-		m_listOObject[iii] = NULL;
+		m_listOObject[iii] = nullptr;
 	}
 	m_listOObject.clear();
 	menuClear();
@@ -56,7 +56,7 @@ void ewol::widget::ParameterList::calculateMinMaxSize() {
 }
 
 void ewol::widget::ParameterList::addOObject(ewol::Compositing* _newObject, int32_t _pos) {
-	if (NULL == _newObject) {
+	if (nullptr == _newObject) {
 		EWOL_ERROR("Try to add an empty object in the Widget generic display system");
 		return;
 	}
@@ -70,14 +70,14 @@ void ewol::widget::ParameterList::addOObject(ewol::Compositing* _newObject, int3
 void ewol::widget::ParameterList::clearOObjectList() {
 	for (size_t iii=0; iii<m_listOObject.size(); iii++) {
 		delete(m_listOObject[iii]);
-		m_listOObject[iii] = NULL;
+		m_listOObject[iii] = nullptr;
 	}
 	m_listOObject.clear();
 }
 
 void ewol::widget::ParameterList::onDraw() {
 	for (size_t iii=0; iii<m_listOObject.size(); iii++) {
-		if (NULL != m_listOObject[iii]) {
+		if (nullptr != m_listOObject[iii]) {
 			m_listOObject[iii]->draw();
 		}
 	}
@@ -141,7 +141,7 @@ void ewol::widget::ParameterList::onRegenerateDisplay() {
 		for (int32_t iii=startRaw; iii<nbRaw && iii<(int32_t)(startRaw+displayableRaw); iii++) {
 			std::string myTextToWrite = "???";
 			etk::Color<> fg(0x000000FF);
-			if (m_list[iii] != NULL) {
+			if (m_list[iii] != nullptr) {
 				myTextToWrite = m_list[iii]->m_label;
 			}
 			
@@ -187,7 +187,7 @@ bool ewol::widget::ParameterList::onEventInput(const ewol::event::Input& _event)
 		int32_t rawID = (relativePos.y()+m_originScrooled.y()) / (minHeight + 2*m_paddingSizeY);
 		// generate an event on a rawId if the element request change and Select it ...
 		if (rawID >= 0 && (size_t)rawID < m_list.size()) {
-			if (m_list[rawID]!=NULL) {
+			if (m_list[rawID]!=nullptr) {
 				if (m_list[rawID]->m_refId >= 0) {
 					generateEventId(eventSelect, std::to_string(m_list[rawID]->m_refId));
 					m_idSelected = rawID;
@@ -210,7 +210,7 @@ void ewol::widget::ParameterList::onLostFocus() {
 
 void ewol::widget::ParameterList::menuAdd(std::string& _label, int32_t _refId, std::string& _image) {
 	ewol::widget::elementPL* tmpEmement = new widget::elementPL(_label, _refId, _image, false);
-	if (NULL != tmpEmement) {
+	if (nullptr != tmpEmement) {
 		m_list.push_back(tmpEmement);
 		if (m_idSelected == -1 && _label != "---" && _refId>0) {
 			m_idSelected = m_list.size()-1;
@@ -222,7 +222,7 @@ void ewol::widget::ParameterList::menuAdd(std::string& _label, int32_t _refId, s
 void ewol::widget::ParameterList::menuAddGroup(std::string& _label) {
 	std::string image = "";
 	ewol::widget::elementPL* tmpEmement = new widget::elementPL(_label, -1, image, true);
-	if (NULL != tmpEmement) {
+	if (nullptr != tmpEmement) {
 		m_list.push_back(tmpEmement);
 		markToRedraw();
 	}
@@ -231,9 +231,9 @@ void ewol::widget::ParameterList::menuAddGroup(std::string& _label) {
 void ewol::widget::ParameterList::menuClear() {
 	m_idSelected = -1;
 	for (size_t iii=0; iii<m_list.size(); iii++) {
-		if (NULL != m_list[iii]) {
+		if (nullptr != m_list[iii]) {
 			delete(m_list[iii]);
-			m_list[iii] = NULL;
+			m_list[iii] = nullptr;
 		}
 	}
 	m_list.clear();
diff --git a/sources/ewol/widget/meta/StdPopUp.cpp b/sources/ewol/widget/meta/StdPopUp.cpp
index 38a80efd..0bf2ae3e 100644
--- a/sources/ewol/widget/meta/StdPopUp.cpp
+++ b/sources/ewol/widget/meta/StdPopUp.cpp
@@ -19,14 +19,14 @@
 static const char * const eventButtonExit = "ewol-event-pop-up-exit-button";
 
 ewol::widget::StdPopUp::StdPopUp() :
-  m_title(NULL),
-  m_comment(NULL),
-  m_subBar(NULL) {
+  m_title(nullptr),
+  m_comment(nullptr),
+  m_subBar(nullptr) {
 	addObjectType("ewol::widget::StdPopUp");
 	setMinSize(ewol::Dimension(vec2(20,10),ewol::Dimension::Pourcent));
 	
-	ewol::widget::Sizer* mySizerVert = NULL;
-	ewol::widget::Spacer* mySpacer = NULL;
+	ewol::widget::Sizer* mySizerVert = nullptr;
+	ewol::widget::Spacer* mySpacer = nullptr;
 	
 	mySizerVert = new ewol::widget::Sizer(widget::Sizer::modeVert);
 		// set it in the pop-up-system : 
@@ -77,7 +77,7 @@ ewol::widget::StdPopUp::~StdPopUp() {
 }
 
 void ewol::widget::StdPopUp::setTitle(const std::string& _text) {
-	if (m_title == NULL) {
+	if (m_title == nullptr) {
 		return;
 	}
 	m_title->setLabel(_text);
@@ -85,7 +85,7 @@ void ewol::widget::StdPopUp::setTitle(const std::string& _text) {
 }
 
 void ewol::widget::StdPopUp::setComment(const std::string& _text) {
-	if (m_comment == NULL) {
+	if (m_comment == nullptr) {
 		return;
 	}
 	m_comment->setLabel(_text);
@@ -93,14 +93,14 @@ void ewol::widget::StdPopUp::setComment(const std::string& _text) {
 }
 
 ewol::object::Shared<ewol::widget::Button> ewol::widget::StdPopUp::addButton(const std::string& _text, bool _autoExit) {
-	if (m_subBar == NULL) {
+	if (m_subBar == nullptr) {
 		EWOL_ERROR("button-bar does not existed ...");
-		return NULL;
+		return nullptr;
 	}
 	ewol::widget::Button* myButton = new widget::Button();
-	if (myButton == NULL) {
+	if (myButton == nullptr) {
 		EWOL_ERROR("Can not allocate new button ...");
-		return NULL;
+		return nullptr;
 	}
 	myButton->setSubWidget(new ewol::widget::Label(_text));
 	if(_autoExit == true) {
@@ -115,17 +115,17 @@ void ewol::widget::StdPopUp::onObjectRemove(ewol::object::Shared<ewol::Object> _
 	// call parent:
 	ewol::widget::PopUp::onObjectRemove(_removeObject);
 	if (_removeObject == m_subBar) {
-		m_subBar = NULL;
+		m_subBar = nullptr;
 		markToRedraw();
 		return;
 	}
 	if (_removeObject == m_comment) {
-		m_comment = NULL;
+		m_comment = nullptr;
 		markToRedraw();
 		return;
 	}
 	if (_removeObject == m_title) {
-		m_title = NULL;
+		m_title = nullptr;
 		markToRedraw();
 		return;
 	}