qwt_plot_picker.h

/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   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
 *****************************************************************************/

// vim: expandtab

#ifndef QWT_PLOT_PICKER_H
#define QWT_PLOT_PICKER_H

#include "qwt_double_rect.h"
#include "qwt_plot_canvas.h"
#include "qwt_picker.h"

class QwtPlot;

class QWT_EXPORT QwtPlotPicker: public QwtPicker
{
    Q_OBJECT

public:
    explicit QwtPlotPicker(QwtPlotCanvas *);
    virtual ~QwtPlotPicker();

    explicit QwtPlotPicker(int xAxis, int yAxis,
        QwtPlotCanvas *);

    explicit QwtPlotPicker(int xAxis, int yAxis, int selectionFlags, 
        RubberBand rubberBand, DisplayMode trackerMode, 
        QwtPlotCanvas *);

    virtual void setAxis(int xAxis, int yAxis);

    int xAxis() const;
    int yAxis() const;

    QwtPlot *plot();
    const QwtPlot *plot() const;
    
    QwtPlotCanvas *canvas();
    const QwtPlotCanvas *canvas() const;

signals:

    void selected(const QwtDoublePoint &pos);

    void selected(const QwtDoubleRect &rect);

    void selected(const QwtArray<QwtDoublePoint> &pa);

    void appended(const QwtDoublePoint &pos);

    void moved(const QwtDoublePoint &pos);

protected:
    QwtDoubleRect scaleRect() const;

    QwtDoubleRect invTransform(const QRect &) const;
    QRect transform(const QwtDoubleRect &) const;

    QwtDoublePoint invTransform(const QPoint &) const;
    QPoint transform(const QwtDoublePoint &) const;

    virtual QwtText trackerText(const QPoint &) const;
    virtual QwtText trackerText(const QwtDoublePoint &) const;

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

private:
    int d_xAxis;
    int d_yAxis;
};
            
#endif