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

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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) 2014-2017 John Preston, https://desktop.telegram.org
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*/
#pragma once
namespace Ui {
class SlideAnimation {
public:
void setSnapshots(QPixmap leftSnapshot, QPixmap rightSnapshot);
void setOverflowHidden(bool hidden) {
_overflowHidden = hidden;
}
template <typename Lambda>
void start(bool slideLeft, Lambda &&updateCallback, float64 duration);
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void paintFrame(Painter &p, int x, int y, int outerWidth, TimeMs ms);
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bool animating() const {
return _animation.animating();
}
private:
Animation _animation;
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QPixmap _leftSnapshot;
QPixmap _rightSnapshot;
bool _slideLeft = false;
bool _overflowHidden = true;
int _leftSnapshotWidth = 0;
int _leftSnapshotHeight = 0;
int _rightSnapshotWidth = 0;
};
template <typename Lambda>
void SlideAnimation::start(bool slideLeft, Lambda &&updateCallback, float64 duration) {
_slideLeft = slideLeft;
if (_slideLeft) {
std::swap(_leftSnapshot, _rightSnapshot);
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}
_leftSnapshotWidth = _leftSnapshot.width() / cIntRetinaFactor();
_leftSnapshotHeight = _leftSnapshot.height() / cIntRetinaFactor();
_rightSnapshotWidth = _rightSnapshot.width() / cIntRetinaFactor();
_animation.start(std::forward<Lambda>(updateCallback), 0., 1., duration);
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}
} // namespace Ui