From c91eb1bece864f820e6b580e66938982fb0850ea Mon Sep 17 00:00:00 2001
From: Edouard DUPIN <yui.heero@gmail.com>
Date: Tue, 14 Aug 2012 08:56:17 +0200
Subject: [PATCH] draw on PC only when needed

---
 Sources/libewol/ewol/Widget.cpp        | 11 +++++++++++
 Sources/libewol/ewol/Widget.h          |  2 +-
 Sources/libewol/ewol/WidgetManager.cpp | 21 +++++++++++++++------
 Sources/libewol/ewol/WidgetManager.h   |  2 ++
 Sources/libewol/ewol/base/gui.cpp      |  5 +++--
 5 files changed, 32 insertions(+), 9 deletions(-)

diff --git a/Sources/libewol/ewol/Widget.cpp b/Sources/libewol/ewol/Widget.cpp
index 4dafb45e..8160bb68 100644
--- a/Sources/libewol/ewol/Widget.cpp
+++ b/Sources/libewol/ewol/Widget.cpp
@@ -291,3 +291,14 @@ void ewol::Widget::PeriodicCallSet(bool statusToSet)
 		ewol::widgetManager::PeriodicCallRm(this);
 	}
 }
+
+/**
+ * @brief The widget mark itself that it need to regenerate the nest time.
+ * @param ---
+ * @return ---
+ */
+void ewol::Widget::MarkToReedraw(void)
+{
+	m_needRegenerateDisplay = true;
+	ewol::widgetManager::MarkDrawingIsNeeded();
+};
diff --git a/Sources/libewol/ewol/Widget.h b/Sources/libewol/ewol/Widget.h
index 8921e4db..f5a51c1b 100644
--- a/Sources/libewol/ewol/Widget.h
+++ b/Sources/libewol/ewol/Widget.h
@@ -415,7 +415,7 @@ namespace ewol {
 			 * @param ---
 			 * @return ---
 			 */
-			void MarkToReedraw(void) { m_needRegenerateDisplay = true; };
+			void MarkToReedraw(void);
 			/**
 			 * @brief Get the need of the redrawing of the widget and reset it to false
 			 * @param ---
diff --git a/Sources/libewol/ewol/WidgetManager.cpp b/Sources/libewol/ewol/WidgetManager.cpp
index f7ffd51d..e37d881d 100644
--- a/Sources/libewol/ewol/WidgetManager.cpp
+++ b/Sources/libewol/ewol/WidgetManager.cpp
@@ -32,7 +32,6 @@
 #undef __class__
 #define __class__	"WidgetManager"
 
-static pthread_mutex_t localMutex;
 static bool IsInit = false;
 
 // For the focus Management
@@ -41,17 +40,17 @@ static ewol::Widget * m_focusWidgetCurrent = NULL;
 static etk::VectorType<ewol::Widget*> l_listOfPeriodicWidget;
 static bool                           l_havePeriodic = false;
 
+static bool                           l_haveRedraw = true;
+
 void ewol::widgetManager::Init(void)
 {
 	EWOL_DEBUG("==> Init Widget-Manager");
-	// create interface mutex :
-	int ret = pthread_mutex_init(&localMutex, NULL);
-	EWOL_ASSERT(ret == 0, "Error creating Mutex ...");
 	// prevent android error ==> can create memory leak but I prefer
 	m_focusWidgetDefault = NULL;
 	m_focusWidgetCurrent = NULL;
 	l_listOfPeriodicWidget.Clear();
 	l_havePeriodic = false;
+	l_haveRedraw = true;
 	// init all the widget global parameters :
 	ewol::WIDGET_JoystickInit();
 	ewol::WIDGET_ButtonInit();
@@ -70,8 +69,6 @@ void ewol::widgetManager::UnInit(void)
 	IsInit = false;
 	
 	l_listOfPeriodicWidget.Clear();
-	int ret = pthread_mutex_destroy(&localMutex);
-	EWOL_ASSERT(ret == 0, "Error destroying Mutex ...");
 }
 
 void ewol::widgetManager::Rm(ewol::Widget * newWidget)
@@ -214,3 +211,15 @@ bool ewol::widgetManager::PeriodicCallHave(void)
 	return l_havePeriodic;
 }
 
+
+void ewol::widgetManager::MarkDrawingIsNeeded(void)
+{
+	l_haveRedraw = true;
+}
+
+bool ewol::widgetManager::IsDrawingNeeded(void)
+{
+	bool tmp = l_haveRedraw;
+	l_haveRedraw = false;
+	return tmp;
+}
diff --git a/Sources/libewol/ewol/WidgetManager.h b/Sources/libewol/ewol/WidgetManager.h
index cfa3e05f..2d88e690 100644
--- a/Sources/libewol/ewol/WidgetManager.h
+++ b/Sources/libewol/ewol/WidgetManager.h
@@ -49,6 +49,8 @@ namespace ewol {
 		void           PeriodicCall(int64_t localTime);
 		bool           PeriodicCallHave(void);
 		
+		void           MarkDrawingIsNeeded(void);
+		bool           IsDrawingNeeded(void);
 	};
 };
 
diff --git a/Sources/libewol/ewol/base/gui.cpp b/Sources/libewol/ewol/base/gui.cpp
index a1c9cdf1..bc0921c9 100644
--- a/Sources/libewol/ewol/base/gui.cpp
+++ b/Sources/libewol/ewol/base/gui.cpp
@@ -254,8 +254,9 @@ void EWOL_GenericDraw(bool everyTime)
 			display = true;
 		}
 		int64_t currentTime3 = GetCurrentTime();
-		// TODO : Check if somthink has regenerate his display befor redraw ...
-		{
+		// check if the regenerate is needed ...
+		if(    true == ewol::widgetManager::IsDrawingNeeded()
+		    || true == everyTime) {
 			ewol::texture::UpdateContext();
 			nbDisplayTime++;
 			gui_uniqueWindows->SysDraw();