67 lines
2.7 KiB
C++
67 lines
2.7 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
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*/
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#include "ui/effects/slide_animation.h"
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namespace Ui {
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void SlideAnimation::setSnapshots(QPixmap leftSnapshot, QPixmap rightSnapshot) {
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_leftSnapshot = std::move(leftSnapshot);
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_rightSnapshot = std::move(rightSnapshot);
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t_assert(!_leftSnapshot.isNull());
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t_assert(!_rightSnapshot.isNull());
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_leftSnapshot.setDevicePixelRatio(cRetinaFactor());
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_rightSnapshot.setDevicePixelRatio(cRetinaFactor());
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}
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void SlideAnimation::paintFrame(Painter &p, int x, int y, int outerWidth, TimeMs ms) {
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auto dt = _animation.current(ms, 1.);
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if (!animating()) return;
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auto easeOut = anim::easeOutCirc(1., dt);
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auto easeIn = anim::easeInCirc(1., dt);
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auto arrivingAlpha = easeIn;
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auto departingAlpha = 1. - easeOut;
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auto leftCoord = (_slideLeft ? anim::interpolate(-_leftSnapshotWidth, 0, easeOut) : anim::interpolate(0, -_leftSnapshotWidth, easeIn));
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auto leftAlpha = (_slideLeft ? arrivingAlpha : departingAlpha);
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auto rightCoord = (_slideLeft ? anim::interpolate(0, _rightSnapshotWidth, easeIn) : anim::interpolate(_rightSnapshotWidth, 0, easeOut));
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auto rightAlpha = (_slideLeft ? departingAlpha : arrivingAlpha);
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if (_overflowHidden) {
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auto leftWidth = (_leftSnapshotWidth + leftCoord);
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if (leftWidth > 0) {
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p.setOpacity(leftAlpha);
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p.drawPixmap(x, y, leftWidth, _leftSnapshotHeight, _leftSnapshot, (_leftSnapshot.width() - leftWidth * cIntRetinaFactor()), 0, leftWidth * cIntRetinaFactor(), _leftSnapshot.height());
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}
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auto rightWidth = _rightSnapshotWidth - rightCoord;
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if (rightWidth > 0) {
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p.setOpacity(rightAlpha);
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p.drawPixmap(x + rightCoord, y, _rightSnapshot, 0, 0, rightWidth * cIntRetinaFactor(), _rightSnapshot.height());
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}
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} else {
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p.setOpacity(leftAlpha);
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p.drawPixmap(x + leftCoord, y, _leftSnapshot);
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p.setOpacity(rightAlpha);
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p.drawPixmap(x + rightCoord, y, _rightSnapshot);
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}
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}
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} // namespace Ui
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