# File vtk/gtk/GtkGLExtVTKRenderWindow.rb, line 38
  def initialize
    super

    glconfig = Gdk::GLConfig.new(Gdk::GLConfig::MODE_RGB|
                                   Gdk::GLConfig::MODE_DEPTH)

    set_gl_capability(glconfig)

    @RenderWindow = Vtk::RenderWindow.new
    # private attributes
    @Created = false

    # used by the LOD actors
    @DesiredUpdateRate = 15
    @StillUpdateRate = 0.0001

    self.ConnectSignals

    # need this to be able to handle key_press events.
    set_flags(Gtk::Window::CAN_FOCUS)
    # default size
    set_size_request(300, 300)
  end