81 lines
1.7 KiB
C++
81 lines
1.7 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "ui/effects/glare.h"
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#include "styles/style_boxes.h"
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namespace Ui {
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namespace {
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constexpr auto kMaxGlareOpaque = 0.5;
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} // namespace
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float64 GlareEffect::progress(crl::time now) const {
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return (now - glare.birthTime)
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/ float64(glare.deathTime - glare.birthTime);
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}
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QLinearGradient GlareEffect::computeGradient(const QColor &color) const {
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auto gradient = QLinearGradient(
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QPointF(0, 0),
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QPointF(width, 0));
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auto tempColor = color;
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tempColor.setAlphaF(0);
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const auto edge = tempColor;
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tempColor.setAlphaF(kMaxGlareOpaque);
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const auto middle = tempColor;
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gradient.setStops({
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{ 0., edge },
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{ .5, middle },
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{ 1., edge },
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});
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return gradient;
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}
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void GlareEffect::validate(
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const QColor &color,
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Fn<void()> updateCallback,
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crl::time timeout,
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crl::time duration) {
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if (anim::Disabled()) {
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return;
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}
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if (!width) {
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width = st::gradientButtonGlareWidth;
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}
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animation.init([=](crl::time now) {
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if (const auto diff = (now - glare.deathTime); diff > 0) {
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if (diff > timeout && !paused) {
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glare = {
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.birthTime = now,
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.deathTime = now + duration,
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};
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updateCallback();
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}
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} else {
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updateCallback();
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}
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});
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animation.start();
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{
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auto newPixmap = QPixmap(QSize(width, 1)
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* style::DevicePixelRatio());
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newPixmap.setDevicePixelRatio(style::DevicePixelRatio());
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newPixmap.fill(Qt::transparent);
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{
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auto p = QPainter(&newPixmap);
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p.fillRect(newPixmap.rect(), QBrush(computeGradient(color)));
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}
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pixmap = std::move(newPixmap);
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}
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}
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} // namespace Ui
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