/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   GtkRadiant is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined( INCLUDED_GTKUTIL_IDLEDRAW_H )
#define INCLUDED_GTKUTIL_IDLEDRAW_H

#include <glib.h>

#include "generic/callback.h"

class IdleDraw
{
Callback<void()> m_draw;
unsigned int m_handler;
static gboolean draw( gpointer data ){
	reinterpret_cast<IdleDraw*>( data )->m_draw();
	reinterpret_cast<IdleDraw*>( data )->m_handler = 0;
	return FALSE;
}
public:
IdleDraw( const Callback<void()>& draw ) : m_draw( draw ), m_handler( 0 ){
}
~IdleDraw(){
	if ( m_handler != 0 ) {
		g_source_remove( m_handler );
	}
}
void queueDraw(){
	if ( m_handler == 0 ) {
		m_handler = g_idle_add( &draw, this );
	}
}
typedef MemberCaller<IdleDraw, void(), &IdleDraw::queueDraw> QueueDrawCaller;

void flush(){
	if ( m_handler != 0 ) {
		draw( this );
	}
}
};


#endif
