/*
 * UltraStar Deluxe - Karaoke Game
 *
 * UltraStar Deluxe is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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.
 *
 * This program 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 this program; see the file COPYING. If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifndef CONTROL_HPP
#define CONTROL_HPP

#include <list>

namespace usdx
{
	/**
	 * Base class for all controls, either the drawable ones as well as the
	 * hidden ones. This class handles a owner slave relation ship and handles
	 * automatic destruction on destruction of the owner,
	 */
	class Control
	{
	private:
		/**
		 * Owner of this control. The owner is responsible for destruction.
		 */
		Control* owner;

	protected:
		/**
		 * All slaves the control owns. All these controls should be deleted
		 * during decontruction of this control.
		 */
		std::list<const Control*> slaves;

		void add_slave(const Control*);
		void remove_slave(const Control*);

	public:
		Control(Control*);
		virtual ~Control();

		/**
		 * Change the current owner of this component. This requires to
		 * unregister this control at the old owner and register it again
		 * withthe new owner.
		 */
		void set_owner(Control*);

		/**
		 * Returns the current owner of this control.
		 */
		const Control* get_owner(void) const;
	};
}

#endif