qwt_plot_zoomer.h

Go to the documentation of this file.

/******************************************************************************
 * 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
 *****************************************************************************/

#ifndef QWT_PLOT_ZOOMER_H
#define QWT_PLOT_ZOOMER_H

#include "qwt_global.h"
#include "qwt_plot_picker.h"

class QSizeF;
template< typename T > class QStack;

class QWT_EXPORT QwtPlotZoomer : public QwtPlotPicker
{
    Q_OBJECT
  public:
    explicit QwtPlotZoomer( QWidget*, bool doReplot = true );
    explicit QwtPlotZoomer( QwtAxisId xAxis, QwtAxisId yAxis,
        QWidget*, bool doReplot = true );

    virtual ~QwtPlotZoomer();

    virtual void setZoomBase( bool doReplot = true );
    virtual void setZoomBase( const QRectF& );

    QRectF zoomBase() const;
    QRectF zoomRect() const;

    virtual void setAxes( QwtAxisId xAxis, QwtAxisId yAxis ) QWT_OVERRIDE;

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

    const QStack< QRectF >& zoomStack() const;
    void setZoomStack( const QStack< QRectF >&,
        int zoomRectIndex = -1 );

    uint zoomRectIndex() const;

  public Q_SLOTS:
    void moveBy( double dx, double dy );
    virtual void moveTo( const QPointF& );

    virtual void zoom( const QRectF& );
    virtual void zoom( int offset );

  Q_SIGNALS:
    void zoomed( const QRectF& rect );

  protected:
    virtual void rescale();

    virtual QSizeF minZoomSize() const;

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

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

  private:
    void init( bool doReplot );

    class PrivateData;
    PrivateData* m_data;
};

#endif