80 lines
1.6 KiB
C++
80 lines
1.6 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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#pragma once
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#include "ui/effects/animations.h"
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namespace Ui {
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class Snowflakes final {
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public:
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Snowflakes(Fn<void(const QRect &r)> updateCallback);
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void paint(QPainter &p, const QRectF &rect);
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void setPaused(bool paused);
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void setBrush(QBrush brush);
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private:
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enum class Type {
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Dot,
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Snowflake,
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};
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struct Interval {
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int from = 0;
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int length = 0;
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};
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struct Particle {
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crl::time birthTime = 0;
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crl::time deathTime = 0;
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float64 scale = 0.;
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float64 alpha = 0.;
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float64 relativeX = 0.; // Relative to a width.
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float64 relativeY = 0.; // Relative to a height.
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float64 velocityX = 0.;
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float64 velocityY = 0.;
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Type type;
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};
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void createParticle(crl::time now);
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[[nodiscard]] crl::time timeNow() const;
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[[nodiscard]] int randomInterval(
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const Interval &interval,
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const gsl::byte &random) const;
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const Interval _lifeLength;
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const Interval _deathTime;
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const Interval _scale;
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const Interval _velocity;
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const Interval _angle;
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const Interval _relativeX;
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const Interval _relativeY;
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const float64 _appearProgressTill;
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const float64 _disappearProgressAfter;
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const QMarginsF _dotMargins;
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const QMargins _renderMargins;
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Ui::Animations::Basic _animation;
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QImage _sprite;
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std::vector<Particle> _particles;
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crl::time _nextBirthTime = 0;
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struct {
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crl::time diff = 0;
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crl::time at = 0;
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} _paused;
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QBrush _brush;
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QRect _rectToUpdate;
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};
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} // namespace Ui
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