event_trigger_generic.h

这是一款2d游戏引擎

/*  $Id: event_trigger_generic.h,v 1.10 2003/10/14 15:52:12 mbn Exp $
**
**  ClanLib Game SDK
**  Copyright (C) 2003  The ClanLib Team
**  For a total list of contributers see the file CREDITS.
**
**  This library is free software; you can redistribute it and/or
**  modify it under the terms of the GNU Lesser General Public
**  License as published by the Free Software Foundation; either
**  version 2.1 of the License, or (at your option) any later version.
**
**  This library 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
**  Lesser General Public License for more details.
**
**  You should have received a copy of the GNU Lesser General Public
**  License along with this library; if not, write to the Free Software
**  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
**
*/

#ifndef header_event_trigger_generic
#define header_event_trigger_generic

#if _MSC_VER > 1000
#pragma once
#endif

class CL_EventListener;

class CL_EventTrigger_Generic
{
//! Construction:
public:
	CL_EventTrigger_Generic();

	virtual ~CL_EventTrigger_Generic();

//! Attributes:
public:
	virtual bool get_flag() const=0;

//! Operations:
public:
	//: Reset trigger flag.
	virtual void reset() const=0;

	//: Raise trigger flag.
	virtual void set_flag()=0;

	//: Wait until one of the event triggers. The timeout is in milliseconds.
	//return: true if the event triggered, false if it timed out.
	virtual bool wait(int timeout = -1) const=0;

	//: Increase reference count.
	void add_ref();

	//: Decrease reference count.
	void release_ref();

//! Implementation:
private:
	int ref_count;
};

#endif