tdesktop/Telegram/SourceFiles/ui/effects/slide_animation.cpp

54 lines
2.0 KiB
C++

/*
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
*/
#include "ui/effects/slide_animation.h"
namespace Ui {
void SlideAnimation::setSnapshots(QPixmap leftSnapshot, QPixmap rightSnapshot) {
_leftSnapshot = std::move(leftSnapshot);
_rightSnapshot = std::move(rightSnapshot);
Assert(!_leftSnapshot.isNull());
Assert(!_rightSnapshot.isNull());
_leftSnapshot.setDevicePixelRatio(cRetinaFactor());
_rightSnapshot.setDevicePixelRatio(cRetinaFactor());
}
void SlideAnimation::paintFrame(Painter &p, int x, int y, int outerWidth) {
auto dt = _animation.value(1.);
if (!animating()) return;
auto easeOut = anim::easeOutCirc(1., dt);
auto easeIn = anim::easeInCirc(1., dt);
auto arrivingAlpha = easeIn;
auto departingAlpha = 1. - easeOut;
auto leftCoord = (_slideLeft ? anim::interpolate(-_leftSnapshotWidth, 0, easeOut) : anim::interpolate(0, -_leftSnapshotWidth, easeIn));
auto leftAlpha = (_slideLeft ? arrivingAlpha : departingAlpha);
auto rightCoord = (_slideLeft ? anim::interpolate(0, _rightSnapshotWidth, easeIn) : anim::interpolate(_rightSnapshotWidth, 0, easeOut));
auto rightAlpha = (_slideLeft ? departingAlpha : arrivingAlpha);
if (_overflowHidden) {
auto leftWidth = (_leftSnapshotWidth + leftCoord);
if (leftWidth > 0) {
p.setOpacity(leftAlpha);
p.drawPixmap(x, y, leftWidth, _leftSnapshotHeight, _leftSnapshot, (_leftSnapshot.width() - leftWidth * cIntRetinaFactor()), 0, leftWidth * cIntRetinaFactor(), _leftSnapshot.height());
}
auto rightWidth = _rightSnapshotWidth - rightCoord;
if (rightWidth > 0) {
p.setOpacity(rightAlpha);
p.drawPixmap(x + rightCoord, y, _rightSnapshot, 0, 0, rightWidth * cIntRetinaFactor(), _rightSnapshot.height());
}
} else {
p.setOpacity(leftAlpha);
p.drawPixmap(x + leftCoord, y, _leftSnapshot);
p.setOpacity(rightAlpha);
p.drawPixmap(x + rightCoord, y, _rightSnapshot);
}
}
} // namespace Ui