# File vtk/gtk/GtkGLExtVTKRenderWindowInteractor.rb, line 217
  def OnEnter(wid, event)
??
    self.grab_focus
    m = self.pointer
    ctrl, shift = _GetCtrlShift(event)
    @Iren.SetEventInformationFlipY(m[0], m[1], ctrl, shift, 0.chr, 0, nil)
    @Iren.EnterEvent
    return true
  end