70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
#ifndef MYCUSTOMGRAPHICSITEM_H
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#define MYCUSTOMGRAPHICSITEM_H
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#include <QObject>
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#include <QWidget>
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#include <QMouseEvent>
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#include <QGraphicsScene>
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#include <QGraphicsRectItem>
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#include <QGraphicsSceneMouseEvent>
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#include <QRect>
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#include <QPainter>
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#include <QPolygon>
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#include <QList>
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#include <QTransform>
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class CMyCustomGraphicsItem : public QObject , public QGraphicsItemGroup
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{
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Q_OBJECT
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public:
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explicit CMyCustomGraphicsItem(QObject *parent = nullptr);
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// void mousePressEvent(QGraphicsSceneMouseEvent *event);
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// void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
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// void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
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void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
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void wheelEvent(QGraphicsSceneWheelEvent *event);
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signals:
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void doubleclick(QGraphicsSceneMouseEvent *event);
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public slots:
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//protected:
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// void mousePressEvent(QGraphicsSceneMouseEvent* event) override {
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// // 当鼠标按下时，切换选中状态
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// isSelected = !isSelected;
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// update(); // 触发重绘
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// }
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// void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override {
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// QGraphicsItemGroup::paint(painter, option, widget);
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// if (isSelected) {
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// // 如果项被选中，绘制一个高亮边框
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// painter->setPen(QPen(Qt::red));
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// painter->drawRoundRect(boundingRect());
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// }
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// }
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//private:
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// bool isSelected = false; // 是否被选中
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};
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class LineItem : public QGraphicsItem
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{
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public:
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LineItem();
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//最大显示范围的设置默认为30
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float maxX();
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void setMaxX(float value);
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public:
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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 mousePressEvent(QGraphicsSceneMouseEvent *event);
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private:
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//显示范围
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float m_maxX;
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};
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#endif // MYCUSTOMGRAPHICSITEM_H
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