96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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* Qwt Widget Library
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* Copyright (C) 1997 Josef Wilgen
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* Copyright (C) 2002 Uwe Rathmann
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the Qwt License, Version 1.0
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*****************************************************************************/
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#ifndef QWT_RASTER_DATA_H
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#define QWT_RASTER_DATA_H 1
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#include "qwt_global.h"
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#include "qwt_interval.h"
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#include <qmap.h>
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#include <qlist.h>
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#include <qpolygon.h>
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class QwtScaleMap;
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/*!
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\brief QwtRasterData defines an interface to any type of raster data.
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QwtRasterData is an abstract interface, that is used by
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QwtPlotRasterItem to find the values at the pixels of its raster.
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Often a raster item is used to display values from a matrix. Then the
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derived raster data class needs to implement some sort of resampling,
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that maps the raster of the matrix into the requested raster of
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the raster item ( depending on resolution and scales of the canvas ).
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*/
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class QWT_EXPORT QwtRasterData
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{
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public:
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//! Contour lines
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typedef QMap<double, QPolygonF> ContourLines;
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//! Flags to modify the contour algorithm
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enum ConrecFlag
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{
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//! Ignore all vertices on the same level
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IgnoreAllVerticesOnLevel = 0x01,
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//! Ignore all values, that are out of range
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IgnoreOutOfRange = 0x02
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};
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//! Flags to modify the contour algorithm
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typedef QFlags<ConrecFlag> ConrecFlags;
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QwtRasterData();
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virtual ~QwtRasterData();
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virtual void setInterval( Qt::Axis, const QwtInterval & );
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const QwtInterval &interval(Qt::Axis) const;
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virtual QRectF pixelHint( const QRectF & ) const;
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virtual void initRaster( const QRectF &, const QSize& raster );
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virtual void discardRaster();
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/*!
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\return the value at a raster position
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\param x X value in plot coordinates
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\param y Y value in plot coordinates
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*/
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virtual double value( double x, double y ) const = 0;
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virtual ContourLines contourLines( const QRectF &rect,
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const QSize &raster, const QList<double> &levels,
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ConrecFlags ) const;
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class Contour3DPoint;
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class ContourPlane;
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private:
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// Disabled copy constructor and operator=
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QwtRasterData( const QwtRasterData & );
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QwtRasterData &operator=( const QwtRasterData & );
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QwtInterval d_intervals[3];
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};
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/*!
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\return Bounding interval for a axis
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\sa setInterval
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*/
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inline const QwtInterval &QwtRasterData::interval( Qt::Axis axis) const
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{
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return d_intervals[axis];
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}
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Q_DECLARE_OPERATORS_FOR_FLAGS( QwtRasterData::ConrecFlags )
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#endif
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