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95 lines
2.6 KiB
95 lines
2.6 KiB
/* -*- 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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