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Telegram/SourceFiles/editor/editor_crop.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/rp_widget.h"
+
+#include "base/flat_map.h"
+#include "editor/photo_editor_common.h"
+
+namespace Editor {
+
+// Crop control.
+class Crop final : public Ui::RpWidget {
+public:
+	Crop(
+		not_null<Ui::RpWidget*> parent,
+		const PhotoModifications &modifications,
+		const QSize &imageSize,
+		EditorData type);
+
+	void applyTransform(
+		const QRect &geometry,
+		int angle,
+		bool flipped,
+		const QSizeF &scaledImageSize);
+	[[nodiscard]] QRect saveCropRect();
+	[[nodiscard]] style::margins cropMargins() const;
+
+protected:
+	void mousePressEvent(QMouseEvent *e) override;
+	void mouseReleaseEvent(QMouseEvent *e) override;
+	void mouseMoveEvent(QMouseEvent *e) override;
+
+private:
+	struct InfoAtDown {
+		QRectF rect;
+		Qt::Edges edge;
+		QPoint point;
+		float64 cropRatio = 0.;
+
+		struct Borders {
+			int left = 0;
+			int right = 0;
+			int top = 0;
+			int bottom = 0;
+		} borders;
+	};
+
+	void paintPoints(QPainter &p);
+
+	void updateEdges();
+	[[nodiscard]] QPoint pointOfEdge(Qt::Edges e) const;
+	void setCropPaint(QRectF &&rect);
+	void convertCropPaintToOriginal();
+
+	void computeDownState(const QPoint &p);
+	void clearDownState();
+	[[nodiscard]] Qt::Edges mouseState(const QPoint &p);
+	void performCrop(const QPoint &pos);
+	void performMove(const QPoint &pos);
+
+	const int _pointSize;
+	const float _pointSizeH;
+	const style::margins _innerMargins;
+	const QPoint _offset;
+	const QMarginsF _edgePointMargins;
+	const QSize _imageSize;
+	const EditorData _data;
+
+	base::flat_map<Qt::Edges, QRectF> _edges;
+
+	struct {
+		float64 w = 0.;
+		float64 h = 0.;
+	} _ratio;
+
+	QRectF _cropPaint;
+	QRectF _cropOriginal;
+	QRectF _innerRect;
+
+	QPainterPath _painterPath;
+
+	InfoAtDown _down;
+
+	int _angle = 0;
+	bool _flipped = false;
+
+	bool _keepAspectRatio = false;
+
+};
+
+} // namespace Editor