rb_define_method (cEcoreEvas, "on_mouse_out", c_on_mouse_out, 0);
rb_define_method (cEcoreEvas, "on_pre_render", c_on_pre_render, 0);
rb_define_method (cEcoreEvas, "on_post_render", c_on_post_render, 0);
rb_define_method (cEcoreEvas, "on_mouse_out", c_on_mouse_out, 0);
rb_define_method (cEcoreEvas, "on_pre_render", c_on_pre_render, 0);
rb_define_method (cEcoreEvas, "on_post_render", c_on_post_render, 0);