# File vtk/gtk/GtkGLExtVTKRenderWindowInteractor.rb, line 184
  def OnButtonUp(wid, event)
??
    m = self.pointer
    ctrl, shift = _GetCtrlShift(event)
    @Iren.SetEventInformationFlipY(m[0], m[1], ctrl, shift, 0.chr, 0, nil)
    button = event.button
    if button == 3
      @Iren.RightButtonReleaseEvent
      return true
    elsif button == 1
      @Iren.LeftButtonReleaseEvent
      return true
    elsif button == 2
      @Iren.MiddleButtonReleaseEvent
      return true
    end

    return false
  end