# File vtk/tk/vtkTkRenderWindowInteractor.rb, line 301
  def LeaveEvent(event, ctrl, shift)
    if @FocusOnEnter && (@OldFocus != nil)
      @OldFocus.focus
    end
    @Iren.SetEventInformationFlipY(event.x, event.y, ctrl, shift,
                                   0.chr, 0, nil)
    @Iren.LeaveEvent
  end