[vtkusers] Call to Render on WM_PAINT in vtkWin32RenderWindowInteractor

[Xabi Riobe]

Hi,

Does someone know why in vtkWin32RenderWindowInteractor::vtkHandleMessage2
there is the Render() call on WM_PAINT:

case WM_PAINT:
  me->Render();
  return CallWindowProc(me->OldProc,hWnd,uMsg,wParam,lParam);
  break;

since CallWindowProc will lead to vtkWin32OpenGLRenderWindow::MessageProc
that performs the rendering on WM_PAINT

So we have a double rendering that can be slow...

For example, resize a render window and you can see this happening.

Thanks for any info about that
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