| 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_MATRIX_RASTER_DATA_H
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| 11 | #define QWT_MATRIX_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_raster_data.h"
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| 15 | #include <qvector.h>
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| 16 |
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| 17 | /*!
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| 18 | \brief A class representing a matrix of values as raster data
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| 19 |
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| 20 | QwtMatrixRasterData implements an interface for a matrix of
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| 21 | equidistant values, that can be used by a QwtPlotRasterItem.
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| 22 | It implements a couple of resampling algorithms, to provide
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| 23 | values for positions, that or not on the value matrix.
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| 24 | */
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| 25 | class QWT_EXPORT QwtMatrixRasterData: public QwtRasterData
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| 26 | {
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| 27 | public:
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| 28 | /*!
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| 29 | \brief Resampling algorithm
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| 30 | The default setting is NearestNeighbour;
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| 31 | */
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| 32 | enum ResampleMode
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| 33 | {
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| 34 | /*!
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| 35 | Return the value from the matrix, that is nearest to the
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| 36 | the requested position.
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| 37 | */
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| 38 | NearestNeighbour,
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| 39 |
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| 40 | /*!
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| 41 | Interpolate the value from the distances and values of the
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| 42 | 4 surrounding values in the matrix,
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| 43 | */
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| 44 | BilinearInterpolation
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| 45 | };
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| 46 |
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| 47 | QwtMatrixRasterData();
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| 48 | virtual ~QwtMatrixRasterData();
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| 49 |
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| 50 | void setResampleMode(ResampleMode mode);
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| 51 | ResampleMode resampleMode() const;
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| 52 |
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| 53 | virtual void setInterval( Qt::Axis, const QwtInterval & );
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| 54 |
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| 55 | void setValueMatrix( const QVector<double> &values, int numColumns );
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| 56 | const QVector<double> valueMatrix() const;
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| 57 |
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| 58 | void setValue( int row, int col, double value );
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| 59 |
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| 60 | int numColumns() const;
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| 61 | int numRows() const;
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| 62 |
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| 63 | virtual QRectF pixelHint( const QRectF & ) const;
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| 64 |
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| 65 | virtual double value( double x, double y ) const;
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| 66 |
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| 67 | private:
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| 68 | void update();
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| 69 |
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| 70 | class PrivateData;
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| 71 | PrivateData *d_data;
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| 72 | };
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| 73 |
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| 74 | #endif
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