1#pragma once
2
3#include <gtk/gtk.h>
4
5#define DEMO_TYPE_WIDGET (demo_widget_get_type ())
6G_DECLARE_FINAL_TYPE (DemoWidget, demo_widget, DEMO, WIDGET, GtkWidget)
7
8GtkWidget * demo_widget_new (void);
9
10void demo_widget_add_child (DemoWidget *self,
11 GtkWidget *child);
12

source code of gtk/demos/gtk-demo/demowidget.h