source: ntrip/trunk/BNC/qwt/qwt_raster_data.h@ 7235

Last change on this file since 7235 was 4271, checked in by mervart, 12 years ago
File size: 2.6 KB
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1/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2 * Qwt Widget Library
3 * Copyright (C) 1997 Josef Wilgen
4 * Copyright (C) 2002 Uwe Rathmann
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the Qwt License, Version 1.0
8 *****************************************************************************/
9
10#ifndef QWT_RASTER_DATA_H
11#define QWT_RASTER_DATA_H 1
12
13#include "qwt_global.h"
14#include "qwt_interval.h"
15#include <qmap.h>
16#include <qlist.h>
17#include <qpolygon.h>
18
19class QwtScaleMap;
20
21/*!
22 \brief QwtRasterData defines an interface to any type of raster data.
23
24 QwtRasterData is an abstract interface, that is used by
25 QwtPlotRasterItem to find the values at the pixels of its raster.
26
27 Often a raster item is used to display values from a matrix. Then the
28 derived raster data class needs to implement some sort of resampling,
29 that maps the raster of the matrix into the requested raster of
30 the raster item ( depending on resolution and scales of the canvas ).
31*/
32class QWT_EXPORT QwtRasterData
33{
34public:
35 //! Contour lines
36 typedef QMap<double, QPolygonF> ContourLines;
37
38 //! Flags to modify the contour algorithm
39 enum ConrecFlag
40 {
41 //! Ignore all verices on the same level
42 IgnoreAllVerticesOnLevel = 0x01,
43
44 //! Ignore all values, that are out of range
45 IgnoreOutOfRange = 0x02
46 };
47
48 //! Flags to modify the contour algorithm
49 typedef QFlags<ConrecFlag> ConrecFlags;
50
51 QwtRasterData();
52 virtual ~QwtRasterData();
53
54 virtual void setInterval( Qt::Axis, const QwtInterval & );
55 const QwtInterval &interval(Qt::Axis) const;
56
57 virtual QRectF pixelHint( const QRectF & ) const;
58
59 virtual void initRaster( const QRectF &, const QSize& raster );
60 virtual void discardRaster();
61
62 /*!
63 \return the value at a raster position
64 \param x X value in plot coordinates
65 \param y Y value in plot coordinates
66 */
67 virtual double value( double x, double y ) const = 0;
68
69 virtual ContourLines contourLines( const QRectF &rect,
70 const QSize &raster, const QList<double> &levels,
71 ConrecFlags ) const;
72
73 class Contour3DPoint;
74 class ContourPlane;
75
76private:
77 // Disabled copy constructor and operator=
78 QwtRasterData( const QwtRasterData & );
79 QwtRasterData &operator=( const QwtRasterData & );
80
81 QwtInterval d_intervals[3];
82};
83
84/*!
85 \return Bounding interval for a axis
86 \sa setInterval
87*/
88inline const QwtInterval &QwtRasterData::interval( Qt::Axis axis) const
89{
90 return d_intervals[axis];
91}
92
93Q_DECLARE_OPERATORS_FOR_FLAGS( QwtRasterData::ConrecFlags )
94
95#endif
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