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Telegram/lib_ui/ui/effects/ripple_animation.h

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#pragma once
+
+#include <deque>
+
+namespace Images {
+struct CornersMaskRef;
+} // namespace Images
+
+namespace style {
+struct RippleAnimation;
+} // namespace style
+
+namespace Ui {
+
+class RippleAnimation {
+public:
+	// White upon transparent mask,
+	// like colorizeImage(black-white-mask, white).
+	RippleAnimation(
+		const style::RippleAnimation &st,
+		QImage mask,
+		Fn<void()> update);
+
+	void add(QPoint origin, int startRadius = 0);
+	void addFading();
+	void lastStop();
+	void lastUnstop();
+	void lastFinish();
+	void forceRepaint();
+
+	void paint(
+		QPainter &p,
+		int x,
+		int y,
+		int outerWidth,
+		const QColor *colorOverride = nullptr);
+
+	bool empty() const {
+		return _ripples.empty();
+	}
+
+	static QImage MaskByDrawer(
+		QSize size,
+		bool filled,
+		Fn<void(QPainter &p)> drawer);
+	static QImage RectMask(QSize size);
+	static QImage RoundRectMask(QSize size, int radius);
+	static QImage RoundRectMask(QSize size, Images::CornersMaskRef corners);
+	static QImage EllipseMask(QSize size);
+
+	~RippleAnimation();
+
+private:
+	void clear();
+	void clearFinished();
+
+	const style::RippleAnimation &_st;
+	QPixmap _mask;
+	Fn<void()> _update;
+
+	class Ripple;
+	std::deque<std::unique_ptr<Ripple>> _ripples;
+
+};
+
+} // namespace Ui