Moved out glare effect to separate file.

Telegram/SourceFiles/ui/effects/glare.cpp

@@ -0,0 +1,76 @@
+/*
+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/glare.h"
+
+#include "styles/style_boxes.h"
+
+namespace Ui {
+namespace {
+
+constexpr auto kMaxGlareOpaque = 0.5;
+
+} // namespace
+
+float64 GlareEffect::progress(crl::time now) const {
+	return (now - glare.birthTime)
+		/ float64(glare.deathTime - glare.birthTime);
+}
+
+void GlareEffect::validate(
+		const QColor &color,
+		Fn<void()> updateCallback,
+		crl::time timeout,
+		crl::time duration) {
+	if (anim::Disabled()) {
+		return;
+	}
+	if (!width) {
+		width = st::gradientButtonGlareWidth;
+	}
+	animation.init([=](crl::time now) {
+		if (const auto diff = (now - glare.deathTime); diff > 0) {
+			if (diff > timeout && !paused) {
+				glare = {
+					.birthTime = now,
+					.deathTime = now + duration,
+				};
+				updateCallback();
+			}
+		} else {
+			updateCallback();
+		}
+	});
+	animation.start();
+	{
+		auto newPixmap = QPixmap(QSize(width, 1)
+			* style::DevicePixelRatio());
+		newPixmap.setDevicePixelRatio(style::DevicePixelRatio());
+		newPixmap.fill(Qt::transparent);
+		{
+			auto p = QPainter(&newPixmap);
+			auto gradient = QLinearGradient(
+				QPointF(0, 0),
+				QPointF(width, 0));
+
+			auto tempColor = color;
+			tempColor.setAlphaF(0);
+			const auto edge = tempColor;
+			tempColor.setAlphaF(kMaxGlareOpaque);
+			const auto middle = tempColor;
+			gradient.setStops({
+				{ 0., edge },
+				{ .5, middle },
+				{ 1., edge },
+			});
+			p.fillRect(newPixmap.rect(), QBrush(gradient));
+		}
+		pixmap = std::move(newPixmap);
+	}
+}
+
+} // namespace Ui

Telegram/SourceFiles/ui/effects/glare.h

@@ -0,0 +1,30 @@
+/*
+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
+*/
+#pragma once
+
+namespace Ui {
+
+struct GlareEffect final {
+	void validate(
+		const QColor &color,
+		Fn<void()> updateCallback,
+		crl::time timeout,
+		crl::time duration);
+	[[nodiscard]] float64 progress(crl::time now) const;
+
+	Ui::Animations::Basic animation;
+	struct {
+		crl::time birthTime = 0;
+		crl::time deathTime = 0;
+	} glare;
+	QPixmap pixmap;
+	int width = 0;
+	bool paused = false;
+};
+
+} // namespace Ui

Telegram/SourceFiles/ui/widgets/gradient_round_button.cpp

@@ -11,11 +11,6 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "styles/style_boxes.h"
 
 namespace Ui {
-namespace {
-
-constexpr auto kMaxGlareOpaque = 0.5;
-
-} // namespace
 
 GradientButton::GradientButton(QWidget *widget, QGradientStops stops)
 : RippleButton(widget, st::defaultRippleAnimation)
@@ -37,8 +32,7 @@ void GradientButton::paintGlare(QPainter &p) {
 	if (!_glare.glare.birthTime) {
 		return;
 	}
-	const auto progress = (crl::now() - _glare.glare.birthTime)
-		/ float64(_glare.glare.deathTime - _glare.glare.birthTime);
+	const auto progress = _glare.progress(crl::now());
 	const auto x = (-_glare.width) + (width() + _glare.width * 2) * progress;
 	const auto h = height();
 
@@ -86,49 +80,11 @@ void GradientButton::setGlarePaused(bool paused) {
 }
 
 void GradientButton::validateGlare() {
-	if (anim::Disabled()) {
-		return;
-	}
-	_glare.width = st::gradientButtonGlareWidth;
-	_glare.animation.init([=](crl::time now) {
-		if (const auto diff = (now - _glare.glare.deathTime); diff > 0) {
-			if (diff > st::gradientButtonGlareTimeout && !_glare.paused) {
-				_glare.glare = Glare{
-					.birthTime = now,
-					.deathTime = now + st::gradientButtonGlareDuration,
-				};
-				update();
-			}
-		} else {
-			update();
-		}
-	});
-	_glare.animation.start();
-	{
-		auto pixmap = QPixmap(QSize(_glare.width, 1)
-			* style::DevicePixelRatio());
-		pixmap.setDevicePixelRatio(style::DevicePixelRatio());
-		pixmap.fill(Qt::transparent);
-		{
-			auto p = QPainter(&pixmap);
-			auto gradient = QLinearGradient(
-				QPointF(0, 0),
-				QPointF(_glare.width, 0));
-
-			auto color = st::premiumButtonFg->c;
-			color.setAlphaF(0);
-			const auto edge = color;
-			color.setAlphaF(kMaxGlareOpaque);
-			const auto middle = color;
-			gradient.setStops({
-				{ 0., edge },
-				{ .5, middle },
-				{ 1., edge },
-			});
-			p.fillRect(pixmap.rect(), QBrush(gradient));
-		}
-		_glare.pixmap = std::move(pixmap);
-	}
+	_glare.validate(
+		st::premiumButtonFg->c,
+		[=] { update(); },
+		st::gradientButtonGlareTimeout,
+		st::gradientButtonGlareDuration);
 }
 
 void GradientButton::startGlareAnimation() {

Telegram/SourceFiles/ui/widgets/gradient_round_button.h

@@ -8,6 +8,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #pragma once
 
 #include "ui/widgets/buttons.h"
+#include "ui/effects/glare.h"
 
 namespace Ui {
 
@@ -24,21 +25,10 @@ private:
 	void validateBg();
 	void validateGlare();
 
-	struct Glare final {
-		crl::time birthTime = 0;
-		crl::time deathTime = 0;
-	};
-
 	QGradientStops _stops;
 	QImage _bg;
 
-	struct {
-		Ui::Animations::Basic animation;
-		Glare glare;
-		QPixmap pixmap;
-		int width = 0;
-		bool paused = false;
-	} _glare;
+	GlareEffect _glare;
 
 };
 

Telegram/cmake/td_ui.cmake

@@ -234,6 +234,8 @@ PRIVATE
     ui/controls/window_outdated_bar.h
     ui/effects/fireworks_animation.cpp
     ui/effects/fireworks_animation.h
+    ui/effects/glare.cpp
+    ui/effects/glare.h
     ui/effects/premium_graphics.cpp
     ui/effects/premium_graphics.h
     ui/effects/premium_stars.cpp