first test of internal double buffer ==> display is bad...

Sources/CustumWidget/CodeView/CodeView.cpp

@@ -65,6 +65,9 @@ CodeView::CodeView(void) : MsgBroadcast("Code View", EDN_CAT_WORK_AREA)
 #	elif defined( USE_GTK_VERSION_2_0 )
 	GTK_WIDGET_SET_FLAGS(m_widget, GTK_CAN_FOCUS);
 #	endif
+	// Remove double-buffering ==> in the current case we can not get the previous display...
+	gtk_widget_set_double_buffered(m_widget, false);
+	
 	// Focus Event
 	g_signal_connect(       G_OBJECT(m_widget), "focus_in_event",       G_CALLBACK(CB_focusGet),         this);
 	g_signal_connect(       G_OBJECT(m_widget), "focus_out_event",      G_CALLBACK(CB_focusLost),        this);
@@ -189,8 +192,6 @@ void CodeView::OnMessage(int32_t id, int32_t dataID)
 			break;
 	}
 	// Force redraw of the widget
-//	gtk_widget_queue_draw(m_widget);
-
 	gtk_widget_queue_draw_area(m_widget, 0, 0, m_shawableAreaX, m_shawableAreaY);
 	
 }
@@ -237,6 +238,12 @@ gboolean CodeView::CB_displayDraw( GtkWidget *widget, GdkEventExpose *event, gpo
 	DrawerManager monDrawer(widget, self->m_shawableAreaX, self->m_shawableAreaY);
 	Buffer * tmpBuf = self->m_bufferManager->Get(self->m_bufferID);
 
+	// set cursor : 
+	/*
+	GdkCursor plop;
+	plop.GSEAL = GDK_PENCIL;
+	gdk_window_set_cursor(gtk_widget_get_window(self->m_widget), &plop);
+	*/
 	#ifdef COUNT_TIME
 		GTimeVal timeStart;
 		g_get_current_time(&timeStart);

Sources/CustumWidget/CodeView/CodeView.h

@@ -54,6 +54,7 @@ class CodeView : public MsgBroadcast
 	private:
 		// main windows widget : 
 		GtkWidget *         m_widget;
+		DrawerManager *     m_Drawer;
 		int32_t             m_displayUniqueId;
 		//position_ts         m_displayStart;                 //!< position where the display is starting
 		//position_ts         m_displaySize;                  //!< number of char displayable in the screan

Sources/tools/Display/Display.cpp

@@ -127,6 +127,7 @@ cairo_font_face_t * Display::GetFont(bool bold, bool italic)
 #undef __class__
 #define __class__	"DrawerManager"
 
+#define megaplop  mlkjmlk
 /**
  * @brief DrawerManager constructor : generate a memoryDC where we can draw everything...
  *
@@ -141,26 +142,67 @@ cairo_font_face_t * Display::GetFont(bool bold, bool italic)
  */
 DrawerManager::DrawerManager(GtkWidget * widget, int32_t x, int32_t y)
 {
-
 	m_size.x = x;
 	m_size.y = y;
 	m_haveWork = false;
-	// Create the Cairo Element
 #   if USE_GTK_VERSION_3_0
-	m_cairo = gdk_cairo_create(gtk_widget_get_window(widget));
+	m_windows = gtk_widget_get_window(widget);
 #   elif USE_GTK_VERSION_2_0
-	m_cairo = gdk_cairo_create(widget->window);
+	m_windows = widget->window;
 #   endif
-	//cairo_translate(m_cairo, 0, 7);
-	cairo_set_source_rgb(m_cairo, 0, 0, 0);
+
+#ifdef megaplop
+	m_cairoWindows = gdk_cairo_create(m_windows);
+	
+	// create internal surface :
+	m_imageSurface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, x, y);
+	m_cairo = cairo_create(m_imageSurface);
+	
+	// copy current windows :
+	cairo_surface_t * drawable_surface = cairo_get_target(m_cairoWindows);
+	cairo_set_source_surface(m_cairo, drawable_surface, 0, 0);
 	cairo_paint(m_cairo);
+
+
+// for Test only : this remove slowly the old line that is not rewritten
+	cairo_set_source_rgb(m_cairo, 0, 0, 0);
+	cairo_set_source_rgba(m_cairo, 1, 1, 1, 0.3);
+	cairo_paint(m_cairo);
+	
+	cairo_set_font_size(m_cairo, POLICE_SIZE);
+	m_dataToDisplay[0] = '\0';
+	
+	cairo_scale(m_cairo, 1.0, 1.0);
+	cairo_scale(m_cairoWindows, 1.0, 1.0);
+	
+#else
+
+	// start painting : we not use the automatic double buffered for internal optimisation, then we nee to work with this :
+
+	/*
+	GdkRectangle myRect = {0, 0, 300, 300};
+	gdk_window_begin_paint_rect(m_windows, &myRect);
+	*/
+	
+	// Create the Cairo Element
+	m_cairo = gdk_cairo_create(m_windows);
+	//cairo_translate(m_cairo, 0, 7);
+	// for Test only : this remove slowly the old line that is not rewritten
+	cairo_set_source_rgb(m_cairo, 0, 0, 0);
+	cairo_set_source_rgba(m_cairo, 1, 1, 1, 0.3);
+	cairo_paint(m_cairo);
+	
 	cairo_set_font_size(m_cairo, POLICE_SIZE);
 	m_dataToDisplay[0] = '\0';
 	
 	cairo_scale(m_cairo, 1.0, 1.0);
 
+#endif
+
 	m_nbElement = 0;
 	
+	
+	
 	// http://cairographics.org/FAQ/#clear_a_surface
 	// http://gtk.developpez.com/faq/?page=gtkwidget#GTK_WIDGET_transparent
 	//cairo_set_source_rgba(m_cairo, 1, 1, 1, 0);
@@ -168,10 +210,6 @@ DrawerManager::DrawerManager(GtkWidget * widget, int32_t x, int32_t y)
 	//cairo_paint(m_cairo);
 	//cairo_fill(m_cairo);
 	//cairo_stroke (m_cairo);
-
-	
-	
-	
 }
 
 
@@ -187,7 +225,16 @@ DrawerManager::DrawerManager(GtkWidget * widget, int32_t x, int32_t y)
  */
 DrawerManager::~DrawerManager()
 {
+#ifdef megaplop
+	cairo_set_source_surface(m_cairoWindows, m_imageSurface, 0, 0);
+	cairo_paint(m_cairoWindows);
 	cairo_destroy(m_cairo);
+	cairo_destroy(m_cairoWindows);
+#else
+	// fill the diplayed buffer ...
+	//gdk_window_end_paint(m_windows);
+	cairo_destroy(m_cairo);
+#endif
 }
 
 
@@ -432,6 +479,7 @@ void DrawerManager::Cursor(int32_t x, int32_t y)
 		cairo_rel_line_to(m_cairo, 0, -letterHeight);
 	}
 	cairo_stroke(m_cairo);
+	//cairo_set_fill_rule(m_cairo, CAIRO_FILL_RULE_EVEN_ODD);
 	cairo_fill(m_cairo);
 }
 

Sources/tools/Display/Display.h

@@ -85,7 +85,9 @@ class DrawerManager {
 
 		position_ts     m_size;                                 //!< Total size
 		cairo_t *       m_cairo;                                //!< Cairo Layout pointer
-		
+		GdkWindow *     m_windows;                              //!< remember the current widget ==> for some internal problems
+		cairo_t *       m_cairoWindows;                         //!< Cairo context
+		cairo_surface_t *m_imageSurface;
 };