Various makefile and installation things.

[wxWidgets.git] / samples / opengl / isosurf / isosurf.cpp

diff --git a/samples/opengl/isosurf/isosurf.cpp b/samples/opengl/isosurf/isosurf.cpp
index 6ba560cff1abc031e0362130390a6f9df2b32932..1979c71ead7fa8d643350156344c4314974f75f9 100644 (file)
--- a/samples/opengl/isosurf/isosurf.cpp
+++ b/samples/opengl/isosurf/isosurf.cpp
@@ -330,12 +330,20 @@ void TestGLCanvas::OnPaint( wxPaintEvent& event )
     // OnPaint handlers must always create a wxPaintDC.
     wxPaintDC dc(this);
 
+#ifndef __WXMOTIF__
+    if (!GetContext()) return;
+#endif
+
     draw1();
     SwapBuffers();
 }
 
 void TestGLCanvas::OnSize(wxSizeEvent& event)
 {
+#ifndef __WXMOTIF__
+    if (!GetContext()) return;
+#endif
+
     SetCurrent();
     int width, height;
     GetClientSize(& width, & height);