source: ntrip/branches/BNC_2.12/qwt/qwt_matrix_raster_data.h@ 8142

Last change on this file since 8142 was 4271, checked in by mervart, 10 years ago
File size: 1.9 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_MATRIX_RASTER_DATA_H
11#define QWT_MATRIX_RASTER_DATA_H 1
12
13#include "qwt_global.h"
14#include "qwt_raster_data.h"
15#include <qvector.h>
16
17/*!
18 \brief A class representing a matrix of values as raster data
19
20 QwtMatrixRasterData implements an interface for a matrix of
21 equidistant values, that can be used by a QwtPlotRasterItem.
22 It implements a couple of resampling algorithms, to provide
23 values for positions, that or not on the value matrix.
24*/
25class QWT_EXPORT QwtMatrixRasterData: public QwtRasterData
26{
27public:
28 /*!
29 \brief Resampling algorithm
30 The default setting is NearestNeighbour;
31 */
32 enum ResampleMode
33 {
34 /*!
35 Return the value from the matrix, that is nearest to the
36 the requested position.
37 */
38 NearestNeighbour,
39
40 /*!
41 Interpolate the value from the distances and values of the
42 4 surrounding values in the matrix,
43 */
44 BilinearInterpolation
45 };
46
47 QwtMatrixRasterData();
48 virtual ~QwtMatrixRasterData();
49
50 void setResampleMode(ResampleMode mode);
51 ResampleMode resampleMode() const;
52
53 virtual void setInterval( Qt::Axis, const QwtInterval & );
54 void setValueMatrix( const QVector<double> &values, size_t numColumns );
55
56 const QVector<double> valueMatrix() const;
57 size_t numColumns() const;
58 size_t numRows() const;
59
60 virtual QRectF pixelHint( const QRectF & ) const;
61
62 virtual double value( double x, double y ) const;
63
64private:
65 void update();
66
67 class PrivateData;
68 PrivateData *d_data;
69};
70
71#endif
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