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r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 r23128:57a1ceae9616 | /*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file guitimer_func.h GUI Timers. */
#ifndef GUITIMER_FUNC_H
#define GUITIMER_FUNC_H
class GUITimer
{
protected:
uint timer;
uint interval;
public:
GUITimer() : timer(0), interval(0) { }
explicit GUITimer(uint interval) : timer(0), interval(interval) { }
inline bool HasElapsed() const
{
return this->interval == 0;
}
inline void SetInterval(uint interval)
{
this->timer = 0;
this->interval = interval;
}
/**
* Count how many times the interval has elapsed.
* Use to ensure a specific amount of events happen within a timeframe, e.g. for animation.
* @param delta Time since last test.
* @return Number of times the interval has elapsed.
*/
inline uint CountElapsed(uint delta)
{
if (this->interval == 0) return 0;
uint count = delta / this->interval;
if (this->timer + (delta % this->interval) >= this->interval) count++;
this->timer = (this->timer + delta) % this->interval;
return count;
}
/**
* Test if a timer has elapsed.
* Use to ensure an event happens only once within a timeframe, e.g. for window updates.
* @param delta Time since last test.
* @return True iff the timer has elapsed.
*/
inline bool Elapsed(uint delta)
{
if (this->CountElapsed(delta) == 0) return false;
this->SetInterval(0);
return true;
}
};
#endif /* GUITIMER_FUNC_H */
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