qwt_polar_picker.h

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/******************************************************************************
 * 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 QWT_OVERRIDE;
    virtual QwtText trackerTextPolar( const QwtPointPolar& ) const;

    virtual void move( const QPoint& ) QWT_OVERRIDE;
    virtual void append( const QPoint& ) QWT_OVERRIDE;
    virtual bool end( bool ok = true ) QWT_OVERRIDE;

  private:
    virtual QPainterPath pickArea() const QWT_OVERRIDE;

    class PrivateData;
    PrivateData* m_data;
};

#endif