afb81b8278
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90 lines
2.5 KiB
C++
90 lines
2.5 KiB
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#include "ui/effects/slide_animation.h"
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#include <QtGui/QPainter>
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namespace Ui {
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void SlideAnimation::setSnapshots(
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QPixmap leftSnapshot,
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QPixmap rightSnapshot) {
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Expects(!leftSnapshot.isNull());
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Expects(!rightSnapshot.isNull());
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_leftSnapshot = std::move(leftSnapshot);
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_rightSnapshot = std::move(rightSnapshot);
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_leftSnapshot.setDevicePixelRatio(style::DevicePixelRatio());
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_rightSnapshot.setDevicePixelRatio(style::DevicePixelRatio());
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}
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void SlideAnimation::paintFrame(QPainter &p, int x, int y, int outerWidth) {
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if (!animating()) {
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return;
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}
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const auto pixelRatio = style::DevicePixelRatio();
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const auto state = this->state();
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const auto leftCoord = _slideLeft
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? anim::interpolate(-_leftSnapshotWidth, 0, state.leftProgress)
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: anim::interpolate(0, -_leftSnapshotWidth, state.leftProgress);
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const auto rightCoord = _slideLeft
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? anim::interpolate(0, _rightSnapshotWidth, state.rightProgress)
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: anim::interpolate(_rightSnapshotWidth, 0, state.rightProgress);
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if (_overflowHidden) {
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const auto leftWidth = (_leftSnapshotWidth + leftCoord);
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if (leftWidth > 0) {
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p.setOpacity(state.leftAlpha);
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p.drawPixmap(
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x,
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y,
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leftWidth,
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_leftSnapshotHeight,
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_leftSnapshot,
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(_leftSnapshot.width() - leftWidth * pixelRatio),
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0,
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leftWidth * pixelRatio,
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_leftSnapshot.height());
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}
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const auto rightWidth = _rightSnapshotWidth - rightCoord;
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if (rightWidth > 0) {
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p.setOpacity(state.rightAlpha);
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p.drawPixmap(
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x + rightCoord,
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y,
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_rightSnapshot,
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0,
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0,
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rightWidth * pixelRatio,
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_rightSnapshot.height());
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}
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} else {
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p.setOpacity(state.leftAlpha);
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p.drawPixmap(x + leftCoord, y, _leftSnapshot);
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p.setOpacity(state.rightAlpha);
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p.drawPixmap(x + rightCoord, y, _rightSnapshot);
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}
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}
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SlideAnimation::State SlideAnimation::state() const {
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const auto dt = _animation.value(1.);
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const auto easeOut = anim::easeOutCirc(1., dt);
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const auto easeIn = anim::easeInCirc(1., dt);
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const auto arrivingAlpha = easeIn;
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const auto departingAlpha = 1. - easeOut;
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auto result = State();
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result.leftProgress = _slideLeft ? easeOut : easeIn;
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result.leftAlpha = _slideLeft ? arrivingAlpha : departingAlpha;
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result.rightProgress = _slideLeft ? easeIn : easeOut;
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result.rightAlpha = _slideLeft ? departingAlpha : arrivingAlpha;
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return result;
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}
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} // namespace Ui
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