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Telegram/SourceFiles/statistics/widgets/point_details_widget.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 "data/data_statistics_chart.h"
+#include "ui/abstract_button.h"
+
+namespace Ui {
+class RippleAnimation;
+} // namespace Ui
+
+namespace Statistic {
+
+void PaintDetails(
+	QPainter &p,
+	const Data::StatisticalChart::Line &line,
+	int absoluteValue,
+	const QRect &rect);
+
+class PointDetailsWidget : public Ui::AbstractButton {
+public:
+	PointDetailsWidget(
+		not_null<Ui::RpWidget*> parent,
+		const Data::StatisticalChart &chartData,
+		bool zoomEnabled);
+
+	[[nodiscard]] int xIndex() const;
+	void setXIndex(int xIndex);
+	void setAlpha(float64 alpha);
+	[[nodiscard]] float64 alpha() const;
+	void setLineAlpha(int lineId, float64 alpha);
+
+protected:
+	void paintEvent(QPaintEvent *e) override;
+	void mousePressEvent(QMouseEvent *e) override;
+	void mouseReleaseEvent(QMouseEvent *e) override;
+
+private:
+	const bool _zoomEnabled;
+	const Data::StatisticalChart &_chartData;
+	const style::TextStyle &_textStyle;
+	const style::TextStyle &_headerStyle;
+	Ui::Text::String _header;
+	QImage _valueIcon;
+
+	void invalidateCache();
+
+	[[nodiscard]] int lineYAt(int index) const;
+
+	void resizeHeight();
+
+	struct Line final {
+		int id = 0;
+		Ui::Text::String name;
+		Ui::Text::String value;
+		Ui::Text::String percentage;
+		QColor valueColor;
+		float64 alpha = 1.;
+	};
+
+	bool _hasPositiveValues = true;
+
+	int _maxPercentageWidth = 0;
+
+	QRect _innerRect;
+	QRect _textRect;
+	QImage _arrow;
+
+	QImage _cache;
+
+	int _xIndex = -1;
+	float64 _alpha = 1.;
+
+	std::vector<Line> _lines;
+
+	std::unique_ptr<Ui::RippleAnimation> _ripple;
+
+};
+
+} // namespace Statistic