[wxVTK] picking problem: need SetFocus in OnMouseDown?

[Tim H. <tim...@gm...>]

Hello,

When picking in my wxVTK window I sometimes get incorrect results.
This happens when I have a toolbar in the same frame window, and one
of the toolbar controls has focus. The picked location seems to be
vertically offset by the height of the toolbar.

I have found that adding a call to SetFocus() near the top of
wxVTKRenderWindowInteractor::OnMouseDown() resolves the issue nicely.
It makes sense that the render window should get focus when clicked
on, I would suggest.

Thanks,

Tim