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Copy pathTimer.cpp
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120 lines (110 loc) · 2.49 KB
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/*
* Copyright 2010 Daniel Albano
*
* This file is part of OpenXcom.
*
* OpenXcom 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 3 of the License, or
* (at your option) any later version.
*
* OpenXcom 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 OpenXcom. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Timer.h"
/**
* Initializes a new timer with a set interval.
* @param interval Time interval in miliseconds.
*/
Timer::Timer(Uint32 interval) : _start(0), _interval(interval), _running(false), _state(0), _surface(0)
{
}
/**
*
*/
Timer::~Timer()
{
}
/**
* Starts the timer running and counting time.
*/
void Timer::start()
{
_start = SDL_GetTicks();
_running = true;
}
/**
* Stops the timer from running.
*/
void Timer::stop()
{
_start = 0;
_running = false;
}
/**
* Returns the time passed since the last interval.
* @return Time in miliseconds.
*/
Uint32 Timer::getTime()
{
if (_running)
return SDL_GetTicks() - _start;
return 0;
}
/**
* Returns if the timer has been started.
* @return Running state.
*/
bool Timer::isRunning()
{
return _running;
}
/**
* The timer keeps calculating the passed time while it's running,
* calling the respective event handler whenever the set interval passes.
* @param state State that the event handler belongs to.
* @param surface Surface that the event handler belongs to.
*/
void Timer::think(State* state, Surface* surface)
{
if (_running)
{
if (getTime() >= _interval)
{
_start = SDL_GetTicks();
if (state != 0 && _state != 0)
(state->*_state)();
if (surface != 0 && _surface != 0)
(surface->*_surface)();
}
}
}
/**
* Changes the timer's interval to a new value.
* @param interval Interval in miliseconds.
*/
void Timer::setInterval(Uint32 interval)
{
_interval = interval;
}
/**
* Sets a state function for the timer to call every interval.
* @param handler Event handler.
*/
void Timer::onTimer(StateHandler handler)
{
_state = handler;
}
/**
* Sets a surface function for the timer to call every interval.
* @param handler Event handler.
*/
void Timer::onTimer(SurfaceHandler handler)
{
_surface = handler;
}