From fa8745c35a1b172475d3db94ca2f228a1d518787 Mon Sep 17 00:00:00 2001
From: rnv <rnv@opencascade.com>
Date: Wed, 19 Aug 2020 22:38:11 +0300
Subject: [PATCH] '[CEA 19033] With VirtualGL, VTK viewer is void' : repaint
 viewer on resize window

---
 src/SVTK/SVTK_ViewWindow.cxx | 8 ++++++++
 src/SVTK/SVTK_ViewWindow.h   | 3 +++
 2 files changed, 11 insertions(+)

diff --git a/src/SVTK/SVTK_ViewWindow.cxx b/src/SVTK/SVTK_ViewWindow.cxx
index 59e07e88e..14b9587f9 100644
--- a/src/SVTK/SVTK_ViewWindow.cxx
+++ b/src/SVTK/SVTK_ViewWindow.cxx
@@ -34,6 +34,7 @@
 
 #include <QMenu>
 #include <QToolBar>
+#include <QTimer>
 #include <QEvent>
 #include <QFileInfo>
 #include <QSignalMapper>
@@ -2836,3 +2837,10 @@ void SVTK_ViewWindow::synchronize( SUIT_ViewWindow* theView )
 
   blockSignals( blocked );
 }
+
+void SVTK_ViewWindow::resizeEvent( QResizeEvent* theEvent )
+{
+#ifdef VGL_WORKAROUND
+  QTimer::singleShot(0, [this] () { this->Repaint(); } );
+#endif
+}
diff --git a/src/SVTK/SVTK_ViewWindow.h b/src/SVTK/SVTK_ViewWindow.h
index 5e8980bb7..0ab5d7920 100644
--- a/src/SVTK/SVTK_ViewWindow.h
+++ b/src/SVTK/SVTK_ViewWindow.h
@@ -416,6 +416,9 @@ public:
   enum AnaglyphFilter { RedCyan, YellowBlue, GreenMagenta };
 
 protected:
+  
+  virtual void resizeEvent( QResizeEvent* );
+  
   virtual void Initialize(SVTK_View* theView,
                           SVTK_ViewModelBase* theModel);
 
-- 
2.39.2