# File gtkglext/sample/gtkglut.rb, line 166 def GLUT.DisplayFunc(display) if display @@drawing_area.signal_connect("expose_event") do |w, e| glcontext = w.gl_context gldrawable = w.gl_drawable gldrawable.gl_begin(glcontext) do display.call true end end else @@drawing_area.signal_connect("expose_event") { |w, e| } end end