tdesktop/Telegram/SourceFiles/window/window_slide_animation.cpp

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/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
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#include "window/window_slide_animation.h"
#include "styles/style_window.h"
#include "styles/style_boxes.h"
namespace Window {
void SlideAnimation::paintContents(Painter &p, const QRect &update) const {
int retina = cIntRetinaFactor();
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auto progress = _animation.value((_direction == SlideDirection::FromLeft) ? 0. : 1.);
if (_withFade) {
p.fillRect(update, st::boxBg);
auto slideLeft = (_direction == SlideDirection::FromLeft);
auto dt = slideLeft
? (1. - progress)
: progress;
auto easeOut = anim::easeOutCirc(1., dt);
auto easeIn = anim::easeInCirc(1., dt);
auto arrivingAlpha = easeIn;
auto departingAlpha = 1. - easeOut;
auto leftWidthFull = _cacheUnder.width() / cIntRetinaFactor();
auto rightWidthFull = _cacheOver.width() / cIntRetinaFactor();
auto leftCoord = (slideLeft ? anim::interpolate(-leftWidthFull, 0, easeOut) : anim::interpolate(0, -leftWidthFull, easeIn));
auto leftAlpha = (slideLeft ? arrivingAlpha : departingAlpha);
auto rightCoord = (slideLeft ? anim::interpolate(0, rightWidthFull, easeIn) : anim::interpolate(rightWidthFull, 0, easeOut));
auto rightAlpha = (slideLeft ? departingAlpha : arrivingAlpha);
auto leftWidth = (leftWidthFull + leftCoord);
if (leftWidth > 0) {
p.setOpacity(leftAlpha);
p.drawPixmap(0, 0, leftWidth, _cacheUnder.height() / retina, _cacheUnder, (_cacheUnder.width() - leftWidth * cIntRetinaFactor()), 0, leftWidth * cIntRetinaFactor(), _cacheUnder.height());
}
auto rightWidth = rightWidthFull - rightCoord;
if (rightWidth > 0) {
p.setOpacity(rightAlpha);
p.drawPixmap(rightCoord, 0, _cacheOver, 0, 0, rightWidth * cIntRetinaFactor(), _cacheOver.height());
}
} else {
auto coordUnder = anim::interpolate(0, -st::slideShift, progress);
auto coordOver = anim::interpolate(_cacheOver.width() / cIntRetinaFactor(), 0, progress);
if (coordOver) {
p.drawPixmap(QRect(0, 0, coordOver, _cacheUnder.height() / retina), _cacheUnder, QRect(-coordUnder * retina, 0, coordOver * retina, _cacheUnder.height()));
p.setOpacity(progress);
p.fillRect(0, 0, coordOver, _cacheUnder.height() / retina, st::slideFadeOutBg);
p.setOpacity(1);
}
p.drawPixmap(QRect(coordOver, 0, _cacheOver.width() / retina, _cacheOver.height() / retina), _cacheOver, QRect(0, 0, _cacheOver.width(), _cacheOver.height()));
p.setOpacity(progress);
st::slideShadow.fill(p, QRect(coordOver - st::slideShadow.width(), 0, st::slideShadow.width(), _cacheOver.height() / retina));
}
}
void SlideAnimation::setDirection(SlideDirection direction) {
_direction = direction;
}
void SlideAnimation::setPixmaps(const QPixmap &oldContentCache, const QPixmap &newContentCache) {
_cacheUnder = oldContentCache;
_cacheOver = newContentCache;
}
void SlideAnimation::setTopBarShadow(bool enabled) {
_topBarShadowEnabled = enabled;
}
void SlideAnimation::setWithFade(bool withFade) {
_withFade = withFade;
}
void SlideAnimation::setRepaintCallback(RepaintCallback &&callback) {
_repaintCallback = std::move(callback);
}
void SlideAnimation::setFinishedCallback(FinishedCallback &&callback) {
_finishedCallback = std::move(callback);
}
void SlideAnimation::start() {
auto fromLeft = (_direction == SlideDirection::FromLeft);
if (fromLeft) std::swap(_cacheUnder, _cacheOver);
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_animation.start(
[this] { animationCallback(); },
fromLeft ? 1. : 0.,
fromLeft ? 0. : 1.,
st::slideDuration,
transition());
_repaintCallback();
}
void SlideAnimation::animationCallback() {
_repaintCallback();
if (!_animation.animating()) {
if (_finishedCallback) {
_finishedCallback();
}
}
}
} // namespace Window