plotlegend.h

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#ifndef PLOTLEGEND_H
#define PLOTLEGEND_H

#include <QObject>
#include "qwt_plot_legenditem.h"
#include "qwt_plot.h"

class PlotLegend : public QObject, public QwtPlotLegendItem
{
  Q_OBJECT
public:
  PlotLegend(QwtPlot* parent);

  QRectF hideButtonRect() const;

  const QwtPlotItem* processMousePressEvent(QMouseEvent* mouse_event);

private:
  virtual void draw(QPainter* p, const QwtScaleMap& xMap, const QwtScaleMap& yMap, const QRectF& rect) const override;

  virtual void drawLegendData(QPainter* painter, const QwtPlotItem*, const QwtLegendData&,
                              const QRectF&) const override;

  virtual void drawBackground(QPainter* painter, const QRectF& rect) const override;

  QwtPlot* _parent_plot;
  bool _collapsed;

};

#endif  // PLOTLEGEND_H