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74 lines
2.0 KiB
74 lines
2.0 KiB
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- ***************************** |
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* Qwt Widget Library |
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* Copyright (C) 1997 Josef Wilgen |
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* Copyright (C) 2002 Uwe Rathmann |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the Qwt License, Version 1.0 |
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*****************************************************************************/ |
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#ifndef QWT_MATRIX_RASTER_DATA_H |
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#define QWT_MATRIX_RASTER_DATA_H 1 |
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#include "qwt_global.h" |
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#include "qwt_raster_data.h" |
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#include <qvector.h> |
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/*! |
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\brief A class representing a matrix of values as raster data |
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QwtMatrixRasterData implements an interface for a matrix of |
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equidistant values, that can be used by a QwtPlotRasterItem. |
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It implements a couple of resampling algorithms, to provide |
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values for positions, that or not on the value matrix. |
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*/ |
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class QWT_EXPORT QwtMatrixRasterData: public QwtRasterData |
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{ |
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public: |
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/*! |
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\brief Resampling algorithm |
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The default setting is NearestNeighbour; |
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*/ |
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enum ResampleMode |
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{ |
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/*! |
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Return the value from the matrix, that is nearest to the |
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the requested position. |
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*/ |
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NearestNeighbour, |
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/*! |
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Interpolate the value from the distances and values of the |
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4 surrounding values in the matrix, |
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*/ |
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BilinearInterpolation |
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}; |
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QwtMatrixRasterData(); |
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virtual ~QwtMatrixRasterData(); |
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void setResampleMode(ResampleMode mode); |
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ResampleMode resampleMode() const; |
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virtual void setInterval( Qt::Axis, const QwtInterval & ); |
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void setValueMatrix( const QVector<double> &values, int numColumns ); |
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const QVector<double> valueMatrix() const; |
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void setValue( int row, int col, double value ); |
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int numColumns() const; |
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int numRows() const; |
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virtual QRectF pixelHint( const QRectF & ) const; |
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virtual double value( double x, double y ) const; |
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private: |
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void update(); |
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class PrivateData; |
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PrivateData *d_data; |
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}; |
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#endif
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