init

Telegram/SourceFiles/editor/scene/scene_item_base.h

@@ -0,0 +1,159 @@
+/*
+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 "base/unique_qptr.h"
+#include "editor/photo_editor_inner_common.h"
+
+#include <QGraphicsItem>
+
+class QGraphicsSceneHoverEvent;
+class QGraphicsSceneMouseEvent;
+class QStyleOptionGraphicsItem;
+
+namespace Ui {
+class PopupMenu;
+} // namespace Ui
+
+namespace Editor {
+
+class NumberedItem : public QGraphicsItem {
+public:
+	enum class Status {
+		Normal,
+		Undid,
+		Removed,
+	};
+
+	enum { Type = UserType + 1 };
+	using QGraphicsItem::QGraphicsItem;
+
+	int type() const override;
+	void setNumber(int number);
+	[[nodiscard]] int number() const;
+
+	[[nodiscard]] Status status() const;
+	void setStatus(Status status);
+	[[nodiscard]] bool isNormalStatus() const;
+	[[nodiscard]] bool isUndidStatus() const;
+	[[nodiscard]] bool isRemovedStatus() const;
+
+	virtual void save(SaveState state);
+	virtual void restore(SaveState state);
+	virtual bool hasState(SaveState state) const;
+private:
+	int _number = 0;
+	Status _status = Status::Normal;
+};
+
+class ItemBase : public NumberedItem {
+public:
+	enum { Type = UserType + 2 };
+
+	struct Data {
+		float64 initialZoom = 0.;
+		std::shared_ptr<float64> zPtr;
+		int size = 0;
+		int x = 0;
+		int y = 0;
+		bool flipped = false;
+		int rotation = 0;
+		QSize imageSize;
+	};
+
+	ItemBase(Data data);
+	QRectF boundingRect() const override;
+	void paint(
+		QPainter *p,
+		const QStyleOptionGraphicsItem *option,
+		QWidget *widget) override;
+	int type() const override;
+
+	bool flipped() const;
+	void setFlip(bool value);
+
+	void updateZoom(float64 zoom);
+
+	bool hasState(SaveState state) const override;
+	void save(SaveState state) override;
+	void restore(SaveState state) override;
+protected:
+	enum HandleType {
+		None,
+		Left,
+		Right,
+	};
+	void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+	void hoverMoveEvent(QGraphicsSceneHoverEvent *event) override;
+	void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+	void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+	void contextMenuEvent(QGraphicsSceneContextMenuEvent *event) override;
+	void keyPressEvent(QKeyEvent *e) override;
+
+	using Action = void(ItemBase::*)();
+	void performForSelectedItems(Action action);
+	void actionFlip();
+	void actionDelete();
+	void actionDuplicate();
+
+	QRectF contentRect() const;
+	QRectF innerRect() const;
+	float64 size() const;
+	float64 horizontalSize() const;
+	float64 verticalSize() const;
+	void setAspectRatio(float64 aspectRatio);
+
+	virtual void performFlip();
+	virtual std::shared_ptr<ItemBase> duplicate(Data data) const = 0;
+private:
+	HandleType handleType(const QPointF &pos) const;
+	QRectF rightHandleRect() const;
+	QRectF leftHandleRect() const;
+	bool isHandling() const;
+	void updateVerticalSize();
+	void updatePens(QPen pen);
+	void handleActionKey(not_null<QKeyEvent*> e);
+
+	Data generateData() const;
+	void applyData(const Data &data);
+
+	const std::shared_ptr<float64> _lastZ;
+	const QSize _imageSize;
+
+	struct {
+		QPen select;
+		QPen selectInactive;
+		QPen handle;
+		QPen handleInactive;
+	} _pens;
+
+	base::unique_qptr<Ui::PopupMenu> _menu;
+
+	struct {
+		Data data;
+		float64 zValue = 0.;
+		NumberedItem::Status status;
+	} _saved, _keeped;
+
+	struct {
+		int min = 0;
+		int max = 0;
+	} _sizeLimits;
+	float64 _scaledHandleSize = 1.0;
+	QMarginsF _scaledInnerMargins;
+
+	float64 _horizontalSize = 0;
+	float64 _verticalSize = 0;
+	float64 _aspectRatio = 1.0;
+	HandleType _handle = HandleType::None;
+
+	bool _flipped = false;
+
+};
+
+} // namespace Editor