callout.h

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** This file is part of the Qt Charts module of the Qt Toolkit.
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#ifndef CALLOUT_H
#define CALLOUT_H

#include <QtCharts/QChartGlobal>
#include <QtGui/QFont>
#include <QtWidgets/QGraphicsItem>

QT_BEGIN_NAMESPACE
class QGraphicsSceneMouseEvent;
QT_END_NAMESPACE

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