tdesktop/Telegram/SourceFiles/ui/slide_animation.cpp

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/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop 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.
It 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.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
*/
#include "stdafx.h"
#include "ui/slide_animation.h"
SlideAnimation::SlideAnimation()
: _animation(animation(this, &SlideAnimation::step)) {
}
void SlideAnimation::paintContents(Painter &p, const QRect &update) const {
_animation.step(getms());
if (a_progress.current() < 1) {
p.fillRect(update, st::white);
int retina = cIntRetinaFactor();
int underLeft = a_coordUnder.current();
int underWidth = _cacheUnder.width() / retina;
int underHeight = _cacheUnder.height() / retina;
QRect underDest(0, 0, underWidth + underLeft, underHeight);
QRect underSrc(-underLeft * retina, 0, (underWidth + underLeft) * retina, underHeight * retina);
p.setOpacity(1. - a_progress.current());
p.drawPixmap(underDest, _cacheUnder, underSrc);
p.setOpacity(a_progress.current());
}
p.drawPixmap(a_coordOver.current(), 0, _cacheOver);
}
void SlideAnimation::setDirection(SlideDirection direction) {
_direction = direction;
}
void SlideAnimation::setPixmaps(const QPixmap &oldContentCache, const QPixmap &newContentCache) {
_cacheUnder = oldContentCache;
_cacheOver = newContentCache;
}
void SlideAnimation::setRepaintCallback(RepaintCallback &&callback) {
_repaintCallback = std_::move(callback);
}
void SlideAnimation::setFinishedCallback(FinishedCallback &&callback) {
_finishedCallback = std_::move(callback);
}
void SlideAnimation::start() {
int width = _cacheUnder.width() / cIntRetinaFactor();
int delta = st::slideShift;
a_progress = anim::fvalue(0, 1);
if (_direction == SlideDirection::FromLeft) {
std::swap(_cacheUnder, _cacheOver);
a_coordUnder = anim::ivalue(-delta, 0);
a_coordOver = anim::ivalue(0, delta);
} else {
a_coordUnder = anim::ivalue(0, -delta);
a_coordOver = anim::ivalue(delta, 0);
}
_animation.start();
}
void SlideAnimation::step(float64 ms, bool timer) {
float64 dt = ms / 3000;// st::slideDuration;
if (dt >= 1) {
dt = 1;
if (timer) {
_animation.stop();
a_coordUnder.finish();
a_coordOver.finish();
_finishedCallback.call();
return;
}
}
a_coordUnder.update(dt, anim::linear);
a_coordOver.update(dt, anim::linear);
a_progress.update(dt, anim::linear);
if (timer) {
_repaintCallback.call();
}
}