qwt_polar_picker.h

/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * 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_polar_global.h"
#include "qwt_picker.h"
#include <qvector.h>
#include <qpainterpath.h>
 
class QwtPolarPlot;
class QwtPolarCanvas;
class QwtPointPolar;
 
class QWT_POLAR_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;
    virtual QwtText trackerTextPolar( const QwtPointPolar & ) const;
 
    virtual void move( const QPoint & );
    virtual void append( const QPoint & );
    virtual bool end( bool ok = true );
 
private:
    virtual QPainterPath pickArea() const;
 
    class PrivateData;
    PrivateData *d_data;
};
 
#endif