callout.h Example File

callout/callout.h
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#ifndef CALLOUT_H #define CALLOUT_H #include <QtCharts/QChartGlobal> #include <QtWidgets/QGraphicsItem> #include <QtGui/QFont> class QGraphicsSceneMouseEvent; QT_CHARTS_BEGIN_NAMESPACE class QChart; QT_CHARTS_END_NAMESPACE QT_CHARTS_USE_NAMESPACE class Callout : public QGraphicsItem { public: Callout(QChart *parent); void setText(const QString &text); void setAnchor(QPointF point); void updateGeometry(); QRectF boundingRect() const; void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,QWidget *widget); protected: void mousePressEvent(QGraphicsSceneMouseEvent *event); void mouseMoveEvent(QGraphicsSceneMouseEvent *event); private: QString m_text; QRectF m_textRect; QRectF m_rect; QPointF m_anchor; QFont m_font; QChart *m_chart; }; #endif // CALLOUT_H