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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
//! clanCore="System"
//! header=core.h
#ifndef header_timer
#define header_timer
#ifdef CL_API_DLL
#ifdef CL_CORE_EXPORT
#define CL_API_CORE __declspec(dllexport)
#else
#define CL_API_CORE __declspec(dllimport)
#endif
#else
#define CL_API_CORE
#endif
#if _MSC_VER > 1000
#pragma once
#endif
#include "keep_alive.h"
#include "../../signals.h"
//: Timer signal emitter.
//- !group=Core/System!
//- !header=core.h!
//- <p>Use this class to emit a signal as a timer event.</p>
class CL_API_CORE CL_Timer : public CL_KeepAlive
{
//! Construction:
public:
//: Constructs and registers the timer as a keep alive listener.
//- <p>Note that it is disabled by default, so you need to enable() it.</p>
//param interval: Interval in millisecs between each signal emit.
CL_Timer(unsigned long interval = 1000);
//! Attributes:
public:
//: Returns the current time interval.
//return: The current time interval.
unsigned long get_interval();
//: Returns true if the timer is enabled, false otherwise.
bool is_enabled();
//! Operations:
public:
//: Sets a new interval for the timer.
//param interval: Interval in millisecs between each signal emit.
void set_interval(unsigned long interval);
//: Call this function to enable the timer.
void enable();
//: Call this function to disable the timer.
void disable();
//! Signals:
public:
//: Signal emitted everytime the interval has elapsed.
CL_Signal_v0 &sig_timer();
//! Implementation:
private:
virtual void keep_alive();
unsigned long interval;
unsigned long last_time;
bool enabled;
CL_Signal_v0 signal_timer;
};
#endif
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