qwt_plot_zoomer.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_ZOOMER_H
#define QWT_PLOT_ZOOMER_H

#include <qglobal.h>
#if QT_VERSION < 0x040000
#include <qvaluestack.h>
#else
#include <qstack.h>
#endif

#include "qwt_double_rect.h"
#include "qwt_plot_picker.h"

class QWT_EXPORT QwtPlotZoomer: public QwtPlotPicker
{
    Q_OBJECT
public:
    explicit QwtPlotZoomer(QwtPlotCanvas *, bool doReplot = true);
    explicit QwtPlotZoomer(int xAxis, int yAxis, 
        QwtPlotCanvas *, bool doReplot = true);
    explicit QwtPlotZoomer(int xAxis, int yAxis, int selectionFlags,
        DisplayMode trackerMode, QwtPlotCanvas *,
        bool doReplot = true);

    virtual ~QwtPlotZoomer();

    virtual void setZoomBase();
    virtual void setZoomBase(const QwtDoubleRect &);

    QwtDoubleRect zoomBase() const;
    QwtDoubleRect zoomRect() const;

    virtual void setAxis(int xAxis, int yAxis);

    void setMaxStackDepth(int);
    int maxStackDepth() const;

#if QT_VERSION < 0x040000
    const QValueStack<QwtDoubleRect> &zoomStack() const;
#else
    const QStack<QwtDoubleRect> &zoomStack() const;
#endif
    uint zoomRectIndex() const;

    virtual void setSelectionFlags(int);

public slots:
    void moveBy(double x, double y);
    virtual void move(double x, double y);

    virtual void zoom(const QwtDoubleRect &);
    virtual void zoom(int up);

signals:
    void zoomed(const QwtDoubleRect &rect);

protected:
    virtual void rescale();

    virtual QwtDoubleSize minZoomSize() const;

    virtual void widgetMouseReleaseEvent(QMouseEvent *);
    virtual void widgetKeyPressEvent(QKeyEvent *);

    virtual void begin();
    virtual bool end(bool ok = true);
    virtual bool accept(QwtPolygon &) const;

private:
    void init(int selectionFlags, DisplayMode trackerMode, bool doReplot);

    class PrivateData;
    PrivateData *d_data;
};
            
#endif

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