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 | // vim: expandtab
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11 |
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12 | #ifndef QWT_RASTER_DATA_H
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13 | #define QWT_RASTER_DATA_H 1
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14 |
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15 | #include <qmap.h>
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16 | #include "qwt_global.h"
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17 | #include "qwt_double_rect.h"
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18 | #include "qwt_double_interval.h"
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19 |
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20 | #if QT_VERSION >= 0x040000
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21 | #include <qlist.h>
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22 | #include <QPolygonF>
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23 |
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24 | #if defined(QWT_TEMPLATEDLL)
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25 | // MOC_SKIP_BEGIN
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26 | template class QWT_EXPORT QMap<double, QPolygonF>;
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27 | // MOC_SKIP_END
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28 | #endif
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29 |
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30 | #else
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31 | #include <qvaluelist.h>
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32 | #include "qwt_array.h"
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33 | #include "qwt_double_rect.h"
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34 | #if defined(QWT_TEMPLATEDLL)
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35 | // MOC_SKIP_BEGIN
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36 | #ifndef QWTARRAY_TEMPLATE_QWTDOUBLEPOINT // by mjo3
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37 | #define QWTARRAY_TEMPLATE_QWTDOUBLEPOINT
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38 | template class QWT_EXPORT QwtArray<QwtDoublePoint>;
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39 | #endif //end of QWTARRAY_TEMPLATE_QWTDOUBLEPOINT
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40 | #ifndef QMAP_TEMPLATE_DOUBLE_QWTDOUBLEPOINT // by mjo3
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41 | #define QMAP_TEMPLATE_DOUBLE_QWTDOUBLEPOINT
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42 | template class QWT_EXPORT QMap<double, QwtArray<QwtDoublePoint> >;
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43 | #endif //end of QMAP_TEMPLATE_QWTDOUBLEPOINT
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44 | // MOC_SKIP_END
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45 | #endif
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46 | #endif
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47 |
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48 | class QwtScaleMap;
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49 |
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50 | /*!
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51 | \brief QwtRasterData defines an interface to any type of raster data.
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52 |
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53 | QwtRasterData is an abstract interface, that is used by
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54 | QwtPlotRasterItem to find the values at the pixels of its raster.
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55 |
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56 | Often a raster item is used to display values from a matrix. Then the
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57 | derived raster data class needs to implement some sort of resampling,
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58 | that maps the raster of the matrix into the requested raster of
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59 | the raster item ( depending on resolution and scales of the canvas ).
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60 | */
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61 | class QWT_EXPORT QwtRasterData
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62 | {
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63 | public:
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64 | #if QT_VERSION >= 0x040000
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65 | typedef QMap<double, QPolygonF> ContourLines;
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66 | #else
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67 | typedef QMap<double, QwtArray<QwtDoublePoint> > ContourLines;
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68 | #endif
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69 |
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70 | //! Attribute to modify the contour algorithm
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71 | enum ConrecAttribute
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72 | {
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73 | IgnoreAllVerticesOnLevel = 1,
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74 | IgnoreOutOfRange = 2
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75 | };
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76 |
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77 | QwtRasterData();
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78 | QwtRasterData(const QwtDoubleRect &);
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79 | virtual ~QwtRasterData();
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80 |
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81 | //! Clone the data
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82 | virtual QwtRasterData *copy() const = 0;
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83 |
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84 | virtual void setBoundingRect(const QwtDoubleRect &);
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85 | QwtDoubleRect boundingRect() const;
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86 |
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87 | virtual QSize rasterHint(const QwtDoubleRect &) const;
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88 |
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89 | virtual void initRaster(const QwtDoubleRect &, const QSize& raster);
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90 | virtual void discardRaster();
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91 |
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92 | /*!
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93 | \return the value at a raster position
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94 | \param x X value in plot coordinates
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95 | \param y Y value in plot coordinates
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96 | */
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97 | virtual double value(double x, double y) const = 0;
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98 |
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99 | //! \return the range of the values
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100 | virtual QwtDoubleInterval range() const = 0;
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101 |
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102 | #if QT_VERSION >= 0x040000
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103 | virtual ContourLines contourLines(const QwtDoubleRect &rect,
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104 | const QSize &raster, const QList<double> &levels,
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105 | int flags) const;
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106 | #else
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107 | virtual ContourLines contourLines(const QwtDoubleRect &rect,
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108 | const QSize &raster, const QValueList<double> &levels,
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109 | int flags) const;
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110 | #endif
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111 |
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112 | class Contour3DPoint;
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113 | class ContourPlane;
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114 |
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115 | private:
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116 | QwtDoubleRect d_boundingRect;
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117 | };
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118 |
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119 | #endif
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