75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
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/* -*- 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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