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Telegram/SourceFiles/ui/effects/fireworks_animation.h

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+/*
+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
+
+#include "ui/effects/animations.h"
+
+namespace Ui {
+
+class FireworksAnimation final {
+public:
+	explicit FireworksAnimation(Fn<void()> repaint);
+
+	bool paint(QPainter &p, const QRect &rect);
+
+private:
+	struct Particle {
+		enum class Type : uchar {
+			Circle,
+			Rectangle
+		};
+
+		float64 x = 0.;
+		float64 y = 0.;
+		float64 moveX = 0.;
+		float64 moveY = 0.;
+		uint16 rotation = 0;
+
+		Type type = Type::Circle;
+		uchar color = 0;
+		bool right = false;
+		uchar size = 0;
+		uchar xFinished = 0;
+		uchar finishedStart = 0;
+		bool finished = false;
+	};
+
+	void update(crl::time now);
+	void startFall();
+	void paintParticle(
+		QPainter &p,
+		const Particle &particle,
+		const QRect &rect);
+	void initParticle(Particle &particle, bool falling);
+	void updateParticle(Particle &particle, crl::time dt);
+
+	std::vector<Particle> _particles;
+	std::vector<QBrush> _brushes;
+	Ui::Animations::Basic _animation;
+	Fn<void()> _repaint;
+	crl::time _lastUpdate = 0;
+	float64 _speedCoef = 1.;
+	int _fallingDown = 0;
+	int _smallSide = 0;
+	bool _startedFall = false;
+
+};
+
+} // namespace Ui