34 lines
942 B
C++
34 lines
942 B
C++
#ifndef IMAGER_SIMULATIOIN
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#define IMAGER_SIMULATIOIN
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#include <QGraphicsItem>
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class imagerSimulatioin :public QObject,public QGraphicsItem
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{
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Q_OBJECT
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Q_INTERFACES(QGraphicsItem)
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public:
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imagerSimulatioin(QGraphicsItem *parent = Q_NULLPTR);
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~imagerSimulatioin();
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QRectF boundingRect() const;
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void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
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void setPos(qreal x, qreal y);
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//在QGraphicsScene中限制图元的拖动范围：https://www.cnblogs.com/sfy5848/p/6611824.html
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QVariant itemChange(GraphicsItemChange change, const QVariant &value);
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void mouseMoveEvent(QGraphicsSceneMouseEvent *event);//当拖动item时不停会的绘制，消除拖动重影
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void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);//当放开鼠标时，发射此时图元在scene中的坐标
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protected:
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private:
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int m_width;
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int m_height;
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signals :
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void leftMouseButtonPressed(int, int);
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};
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#endif |