blob: a8940f8ac62980d3cac142a1c3bea52adddacc0b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
* Qwt Widget Library
* Copyright (C) 1997 Josef Wilgen
* Copyright (C) 2002 Uwe Rathmann
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the Qwt License, Version 1.0
*****************************************************************************/
#ifndef QWT_MATRIX_RASTER_DATA_H
#define QWT_MATRIX_RASTER_DATA_H 1
#include "qwt_global.h"
#include "qwt_raster_data.h"
#include <qvector.h>
/*!
\brief A class representing a matrix of values as raster data
QwtMatrixRasterData implements an interface for a matrix of
equidistant values, that can be used by a QwtPlotRasterItem.
It implements a couple of resampling algorithms, to provide
values for positions, that or not on the value matrix.
*/
class QWT_EXPORT QwtMatrixRasterData: public QwtRasterData
{
public:
/*!
\brief Resampling algorithm
The default setting is NearestNeighbour;
*/
enum ResampleMode
{
/*!
Return the value from the matrix, that is nearest to the
the requested position.
*/
NearestNeighbour,
/*!
Interpolate the value from the distances and values of the
4 surrounding values in the matrix,
*/
BilinearInterpolation
};
QwtMatrixRasterData();
virtual ~QwtMatrixRasterData();
void setResampleMode(ResampleMode mode);
ResampleMode resampleMode() const;
virtual void setInterval( Qt::Axis, const QwtInterval & );
void setValueMatrix( const QVector<double> &values, size_t numColumns );
const QVector<double> valueMatrix() const;
size_t numColumns() const;
size_t numRows() const;
virtual QRectF pixelHint( const QRectF & ) const;
virtual double value( double x, double y ) const;
private:
void update();
class PrivateData;
PrivateData *d_data;
};
#endif
|
