Removed flickering in Cairo-based rendering backend.

common/drawpanel_gal.cpp

@@ -78,12 +78,7 @@ EDA_DRAW_PANEL_GAL::EDA_DRAW_PANEL_GAL( wxWindow* aParentWindow, wxWindowID aWin
 
     m_viewControls = new KiGfx::WX_VIEW_CONTROLS( m_view, this );
 
-#if wxCHECK_VERSION( 2, 9, 0 )
     Connect( KiGfx::EVT_GAL_REDRAW, wxPaintEventHandler( EDA_DRAW_PANEL_GAL::onPaint ), NULL, this );
-#elif wxCHECK_VERSION( 2, 8, 0 )
-    // FIXME Cairo needs this to be uncommented to remove blinking on refreshing
-    Connect( wxEVT_PAINT, wxPaintEventHandler( EDA_DRAW_PANEL_GAL::onPaint ), NULL, this );
-#endif
     Connect( wxEVT_SIZE, wxSizeEventHandler( EDA_DRAW_PANEL_GAL::onSize ), NULL, this );
 }
 
@@ -105,6 +100,18 @@ EDA_DRAW_PANEL_GAL::~EDA_DRAW_PANEL_GAL()
 
 
 void EDA_DRAW_PANEL_GAL::onPaint( wxPaintEvent& aEvent )
+{
+    Refresh();
+}
+
+
+void EDA_DRAW_PANEL_GAL::onSize( wxSizeEvent& aEvent )
+{
+    m_gal->ResizeScreen( aEvent.GetSize().x, aEvent.GetSize().y );
+}
+
+
+void EDA_DRAW_PANEL_GAL::Refresh( bool eraseBackground, const wxRect* rect )
 {
     m_gal->BeginDrawing();
     m_gal->SetBackgroundColor( KiGfx::COLOR4D( 0, 0, 0, 1.0 ) );
@@ -122,12 +129,6 @@ void EDA_DRAW_PANEL_GAL::onPaint( wxPaintEvent& aEvent )
 }
 
 
-void EDA_DRAW_PANEL_GAL::onSize( wxSizeEvent& aEvent )
-{
-    m_gal->ResizeScreen( aEvent.GetSize().x, aEvent.GetSize().y );
-}
-
-
 void EDA_DRAW_PANEL_GAL::SwitchBackend( GalType aGalType, bool aUseShaders )
 {
     if( m_gal )

include/class_drawpanel_gal.h

@@ -75,7 +75,7 @@ public:
     void SetView( KiGfx::VIEW* aView ) { m_view = aView; }
     KiGfx::VIEW* GetView() const { return m_view; }
 
-    //void Refresh( bool eraseBackground = true, const wxRect* rect = NULL );
+    virtual void Refresh( bool eraseBackground = true, const wxRect* rect = NULL );
 
 protected:
     void onPaint( wxPaintEvent& aEvent );