mkxp-freebird/src/flashable.h

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2013-09-01 14:27:21 +00:00
/*
** flashable.h
**
** This file is part of mkxp.
**
** Copyright (C) 2013 Jonas Kulla <Nyocurio@gmail.com>
**
** mkxp 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.
**
** mkxp 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 mkxp. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef FLASHABLE_H
#define FLASHABLE_H
#include "etc.h"
#include "etc-internal.h"
#include <QDebug>
class Flashable
{
public:
Flashable()
: flashColor(0, 0, 0, 0),
flashing(false),
emptyFlashFlag(false)
{}
virtual ~Flashable() {}
void flash(const Vec4 *color, int duration)
{
if (duration < 1)
return;
flashing = true;
this->duration = duration;
counter = 0;
if (!color)
{
emptyFlashFlag = true;
return;
}
flashColor = *color;
flashAlpha = flashColor.w;
}
void update()
{
if (!flashing)
return;
if (++counter > duration)
{
/* Flash finished. Cleanup */
flashColor = Vec4(0, 0, 0, 0);
flashing = false;
emptyFlashFlag = false;
return;
}
/* No need to update flash color on empty flash */
if (emptyFlashFlag)
return;
float prog = (float) counter / duration;
flashColor.w = flashAlpha * (1 - prog);
}
protected:
Vec4 flashColor;
bool flashing;
bool emptyFlashFlag;
private:
float flashAlpha;
int duration;
int counter;
};
#endif // FLASHABLE_H