qwt_polar_picker.h

/******************************************************************************
 * QwtPolar Widget Library
 * Copyright (C) 2008   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *****************************************************************************/
 
#ifndef QWT_POLAR_PICKER_H
#define QWT_POLAR_PICKER_H
 
#include "qwt_global.h"
#include "qwt_picker.h"
 
#include <qvector.h>
#include <qpainterpath.h>
 
class QwtPolarPlot;
class QwtPolarCanvas;
class QwtPointPolar;
 
class QWT_EXPORT QwtPolarPicker : public QwtPicker
{
    Q_OBJECT
 
  public:
    explicit QwtPolarPicker( QwtPolarCanvas* );
    virtual ~QwtPolarPicker();
 
    explicit QwtPolarPicker(
        RubberBand rubberBand, DisplayMode trackerMode,
        QwtPolarCanvas* );
 
    QwtPolarPlot* plot();
    const QwtPolarPlot* plot() const;
 
    QwtPolarCanvas* canvas();
    const QwtPolarCanvas* canvas() const;
 
    virtual QRect pickRect() const;
 
  Q_SIGNALS:
 
    void selected( const QwtPointPolar& pos );
 
    void selected( const QVector< QwtPointPolar >& points );
 
    void appended( const QwtPointPolar& pos );
 
    void moved( const QwtPointPolar& pos );
 
  protected:
    QwtPointPolar invTransform( const QPoint& ) const;
 
    virtual QwtText trackerText( const QPoint& ) const override;
    virtual QwtText trackerTextPolar( const QwtPointPolar& ) const;
 
    virtual void move( const QPoint& ) override;
    virtual void append( const QPoint& ) override;
    virtual bool end( bool ok = true ) override;
 
  private:
    virtual QPainterPath pickArea() const override;
 
    class PrivateData;
    PrivateData* m_data;
};
 
#endif