#include <gtk/gtk.h>

/* Keep one of these for each dialog window.
 */
typedef struct _MyDialog {
	/* The dialog we are displaying.
	 */
	GtkWidget *dialog;

	/* Timeout until we auto-popdown the dialog.
	 */
	unsigned int popdown_timeout;
} MyDialog;

gboolean
timeout_cb( MyDialog *mydialog )
{
	mydialog->popdown_timeout = 0;
	gtk_widget_destroy( mydialog->dialog );

	/* Returning FALSE means we don't want this timeout triggered again.
	 */
	return( FALSE );
}

void
response_cb( GtkDialog *dialog, int response_id, MyDialog *mydialog )
{
	gtk_widget_destroy( mydialog->dialog );
}

void
destroy_cb( GtkDialog *dialog, MyDialog *mydialog )
{
	if( mydialog->popdown_timeout ) {
		g_source_remove( mydialog->popdown_timeout );
		mydialog->popdown_timeout = 0;
	}
	g_free( mydialog );
}

void
mydialog_new()
{
	MyDialog *mydialog = g_new( MyDialog, 1 );

	mydialog->dialog = gtk_message_dialog_new( NULL, 0, GTK_MESSAGE_INFO,
		GTK_BUTTONS_OK, "You are feeling sleeepy ..." );
	mydialog->popdown_timeout = g_timeout_add( 4500, 
		(GSourceFunc) timeout_cb, mydialog );
	g_signal_connect( mydialog->dialog, "response",
		G_CALLBACK( response_cb ), mydialog );
	g_signal_connect( mydialog->dialog, "destroy",
		G_CALLBACK( destroy_cb ), mydialog );
	gtk_widget_show( mydialog->dialog );
}

gboolean
main_timeout_cb()
{
	mydialog_new();

	return( TRUE );
}

int
main( int argc, char **argv )
{
	gtk_init (&argc, &argv);

	g_timeout_add( 2000, (GSourceFunc) main_timeout_cb, NULL );

	gtk_main();

	return( 0 );
}