| 1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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| 2 | * Qwt Widget Library
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| 3 | * Copyright (C) 1997 Josef Wilgen
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| 4 | * Copyright (C) 2002 Uwe Rathmann
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the Qwt License, Version 1.0
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| 8 | *****************************************************************************/
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| 9 |
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| 10 | #ifndef QWT_RASTER_DATA_H
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| 11 | #define QWT_RASTER_DATA_H 1
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| 12 |
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| 13 | #include "qwt_global.h"
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| 14 | #include "qwt_interval.h"
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| 15 | #include <qmap.h>
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| 16 | #include <qlist.h>
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| 17 | #include <qpolygon.h>
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| 18 |
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| 19 | class QwtScaleMap;
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| 20 |
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| 21 | /*!
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| 22 | \brief QwtRasterData defines an interface to any type of raster data.
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| 23 |
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| 24 | QwtRasterData is an abstract interface, that is used by
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| 25 | QwtPlotRasterItem to find the values at the pixels of its raster.
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| 26 |
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| 27 | Often a raster item is used to display values from a matrix. Then the
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| 28 | derived raster data class needs to implement some sort of resampling,
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| 29 | that maps the raster of the matrix into the requested raster of
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| 30 | the raster item ( depending on resolution and scales of the canvas ).
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| 31 | */
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| 32 | class QWT_EXPORT QwtRasterData
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| 33 | {
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| 34 | public:
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| 35 | //! Contour lines
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| 36 | typedef QMap<double, QPolygonF> ContourLines;
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| 37 |
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| 38 | //! Flags to modify the contour algorithm
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| 39 | enum ConrecFlag
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| 40 | {
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| 41 | //! Ignore all verices on the same level
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| 42 | IgnoreAllVerticesOnLevel = 0x01,
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| 43 |
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| 44 | //! Ignore all values, that are out of range
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| 45 | IgnoreOutOfRange = 0x02
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| 46 | };
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| 47 |
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| 48 | //! Flags to modify the contour algorithm
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| 49 | typedef QFlags<ConrecFlag> ConrecFlags;
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| 50 |
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| 51 | QwtRasterData();
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| 52 | virtual ~QwtRasterData();
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| 53 |
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| 54 | virtual void setInterval( Qt::Axis, const QwtInterval & );
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| 55 | const QwtInterval &interval(Qt::Axis) const;
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| 56 |
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| 57 | virtual QRectF pixelHint( const QRectF & ) const;
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| 58 |
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| 59 | virtual void initRaster( const QRectF &, const QSize& raster );
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| 60 | virtual void discardRaster();
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| 61 |
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| 62 | /*!
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| 63 | \return the value at a raster position
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| 64 | \param x X value in plot coordinates
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| 65 | \param y Y value in plot coordinates
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| 66 | */
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| 67 | virtual double value( double x, double y ) const = 0;
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| 68 |
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| 69 | virtual ContourLines contourLines( const QRectF &rect,
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| 70 | const QSize &raster, const QList<double> &levels,
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| 71 | ConrecFlags ) const;
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| 72 |
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| 73 | class Contour3DPoint;
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| 74 | class ContourPlane;
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| 75 |
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| 76 | private:
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| 77 | // Disabled copy constructor and operator=
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| 78 | QwtRasterData( const QwtRasterData & );
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| 79 | QwtRasterData &operator=( const QwtRasterData & );
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| 80 |
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| 81 | QwtInterval d_intervals[3];
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| 82 | };
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| 83 |
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| 84 | /*!
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| 85 | \return Bounding interval for a axis
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| 86 | \sa setInterval
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| 87 | */
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| 88 | inline const QwtInterval &QwtRasterData::interval( Qt::Axis axis) const
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| 89 | {
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| 90 | return d_intervals[axis];
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| 91 | }
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| 92 |
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| 93 | Q_DECLARE_OPERATORS_FOR_FLAGS( QwtRasterData::ConrecFlags )
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| 94 |
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| 95 | #endif
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