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

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