qwt_raster_data.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_RASTER_DATA_H
#define QWT_RASTER_DATA_H

#include "qwt_global.h"
#include <qnamespace.h>

class QwtInterval;
class QPolygonF;
class QRectF;
class QSize;
template< typename T > class QList;
template< class Key, class T > class QMap;

class QWT_EXPORT QwtRasterData
{
  public:
    typedef QMap< double, QPolygonF > ContourLines;

    enum Attribute
    {
        WithoutGaps = 0x01
    };

    Q_DECLARE_FLAGS( Attributes, Attribute )

    
    enum ConrecFlag
    {
        IgnoreAllVerticesOnLevel = 0x01,

        IgnoreOutOfRange = 0x02
    };

    Q_DECLARE_FLAGS( ConrecFlags, ConrecFlag )

    QwtRasterData();
    virtual ~QwtRasterData();

    void setAttribute( Attribute, bool on = true );
    bool testAttribute( Attribute ) const;

    virtual QwtInterval interval( Qt::Axis ) const = 0;

    virtual QRectF pixelHint( const QRectF& ) const;

    virtual void initRaster( const QRectF&, const QSize& raster );
    virtual void discardRaster();

    virtual double value( double x, double y ) const = 0;

    virtual ContourLines contourLines( const QRectF& rect,
        const QSize& raster, const QList< double >& levels,
        ConrecFlags ) const;

    class Contour3DPoint;
    class ContourPlane;

  private:
    Q_DISABLE_COPY(QwtRasterData)

    class PrivateData;
    PrivateData* m_data;
};

Q_DECLARE_OPERATORS_FOR_FLAGS( QwtRasterData::ConrecFlags )
Q_DECLARE_OPERATORS_FOR_FLAGS( QwtRasterData::Attributes )

#endif