From 0e7db240496ca0e2de06a4c91996728f691ca56c Mon Sep 17 00:00:00 2001
From: Maciej Suminski <maciej.suminski@cern.ch>
Date: Thu, 5 Dec 2013 14:54:30 +0100
Subject: [PATCH] Fixed SetCurrentContext() assert, that was firing on closure
 of pcbnew, when the OpenGL backend was active.

---
 common/drawpanel_gal.cpp      | 7 +++++++
 include/class_drawpanel_gal.h | 6 ++++++
 pcbnew/pcbframe.cpp           | 1 +
 3 files changed, 14 insertions(+)

diff --git a/common/drawpanel_gal.cpp b/common/drawpanel_gal.cpp
index 3ec9568fde..aa30b5ba92 100644
--- a/common/drawpanel_gal.cpp
+++ b/common/drawpanel_gal.cpp
@@ -184,6 +184,13 @@ void EDA_DRAW_PANEL_GAL::Refresh( bool eraseBackground, const wxRect* rect )
 }
 
 
+void EDA_DRAW_PANEL_GAL::StopDrawing()
+{
+    Disconnect( wxEVT_PAINT, wxPaintEventHandler( EDA_DRAW_PANEL_GAL::onPaint ), NULL, this );
+    m_refreshTimer.Stop();
+}
+
+
 void EDA_DRAW_PANEL_GAL::SwitchBackend( GalType aGalType )
 {
     // Protect from refreshing during backend switch
diff --git a/include/class_drawpanel_gal.h b/include/class_drawpanel_gal.h
index 4d9acac711..b7f92c2209 100644
--- a/include/class_drawpanel_gal.h
+++ b/include/class_drawpanel_gal.h
@@ -111,6 +111,12 @@ public:
         m_eventDispatcher = aEventDispatcher;
     }
 
+    /**
+     * Function StopDrawing()
+     * Prevents the GAL canvas from further drawing till it is recreated.
+     */
+    void StopDrawing();
+
 protected:
     void onPaint( wxPaintEvent& WXUNUSED( aEvent ) );
     void onSize( wxSizeEvent& aEvent );
diff --git a/pcbnew/pcbframe.cpp b/pcbnew/pcbframe.cpp
index b6a2a2c2d5..a9a05b94db 100644
--- a/pcbnew/pcbframe.cpp
+++ b/pcbnew/pcbframe.cpp
@@ -556,6 +556,7 @@ void PCB_EDIT_FRAME::OnQuit( wxCommandEvent& event )
 void PCB_EDIT_FRAME::OnCloseWindow( wxCloseEvent& Event )
 {
     m_canvas->SetAbortRequest( true );
+    m_galCanvas->StopDrawing();
 
     if( GetScreen()->IsModify() )
     {