VisionPlus_V3.0/Del/WindowAppBlockComment.h

#pragma once

#include "Common.h"
#include "CommonDraw.h"

class WindowAppBlockComment : public QGraphicsTextItem
{
	Q_OBJECT

public:

	WindowAppBlockComment(QGraphicsItem* parent = nullptr);
	~WindowAppBlockComment();

	//// 设置注释的文字
	//void setComment(const QString& strComm);

	// 设定本Item的自定义类型
	enum { Type = ITEM_TYPE_COMMENT };

	int type() const override
	{
		return Type;
	}

protected slots:

	// 绘制注释控件边框
	void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget) override;
	// 在选中发生变化时
	QVariant itemChange(GraphicsItemChange change, const QVariant& value) override;
	void focusOutEvent(QFocusEvent* event) override;
	// void keyReleaseEvent(QKeyEvent* event) override;

	// 在文本内容变更时触发，自动更新边距
	void onContentsChanged();

	// 响应双击事件，激活文本编辑模式
	void mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event);

	//// 键盘按下时（回车键结束编辑）
	//void keyPressEvent(QKeyEvent* event) override;

	// 计算区域边界
	QRectF boundingRect() const override;

	// 重写Shape函数，使其没有文字的空白部分也可以响应消息
	QPainterPath shape() const override;


	//void hoverEnterEvent(QGraphicsSceneHoverEvent* event) override;
	//void hoverLeaveEvent(QGraphicsSceneHoverEvent* event) override;
	void hoverMoveEvent(QGraphicsSceneHoverEvent* event) override;
	void mousePressEvent(QGraphicsSceneMouseEvent* event) override;
	void mouseMoveEvent(QGraphicsSceneMouseEvent* event) override;
	void mouseReleaseEvent(QGraphicsSceneMouseEvent* event) override;
	// 绘制选中状态
	virtual void paintSelected(QPainter* painter, int iLineWidth);

signals:

	void lostFocus(WindowAppBlockComment* item);
	void selectedChange(QGraphicsItem* item);

protected:

	// 初始化UI风格
	void initStyle();

	// 绘制边框
	void drawFrame(QPainter* painter);

	//// 绘制文字
	//void drawContent(QPainter* painter);

	// 更新矩形区域的尺寸 
	void updateRect();

	//// 刷新全部（包括文字和尺寸）
	//void updateAll();



protected:

	// 控件的拉伸状态
	enum ResizeDirection 
	{
		ResizeNone = 0,
		ResizeLeft = 1,
		ResizeRight = 2,
		ResizeTop = 4,
		ResizeBottom = 8,
		AllDirections = 15,
	};

	// 当前拉伸的方向
	quint32				reDirection;

	// 主体矩形区域
	QRectF				blockRect;
	//// 边界矩形区域
	//QRectF				blockBoundingRect;

	// 是否处于选中状态
	bool				m_bSel;

	// 注释的文字
	QString				m_strComment;

	// 是否处于拉伸状态中
	bool				resizing;

	// 保存上一次的状态
	QPointF				oldPos;
	int					oldWidth;
	int					oldHeight;
};