qwt_grid_raster_data.h

#ifndef QWT_GRID_RASTER_DATA_H
#define QWT_GRID_RASTER_DATA_H
#include "qwt_global.h"
#include "qwt_raster_data.h"
#if QT_VERSION < 0x060000
template< typename T >
class QVector;
#endif
 
class QWT_EXPORT QwtGridRasterData : public QwtRasterData
{
public:
    enum ResampleMode
    {
        NearestNeighbour,
 
        BilinearInterpolation,
 
        BicubicInterpolation
    };
 
public:
    // Constructor
    QwtGridRasterData();
    // Destructor
    virtual ~QwtGridRasterData();
 
    // Set the resampling algorithm
    void setResampleMode(ResampleMode mode);
    // Return the resampling algorithm
    ResampleMode resampleMode() const;
 
    // Return bounding interval for an axis
    virtual QwtInterval interval(Qt::Axis axis) const override final;
 
    // Set new x-axis, y-axis, and data matrix
    void setValue(const QVector< double >& x, const QVector< double >& y, const QVector< QVector< double > >& v);
    // Return the value at a raster position
    virtual double value(double x, double y) const override;
 
    // Calculate the pixel hint
    virtual QRectF pixelHint(const QRectF&) const override;
 
    // Return the size of x-axis
    int xSize() const;
    // Return the size of y-axis
    int ySize() const;
    // Return the size of the value matrix
    std::pair< int, int > valueSize() const;
 
    // Return the value at specified position in the value matrix
    double atValue(int xIndex, int yIndex) const;
 
    // Return the x-axis value at specified index
    double atX(int xIndex) const;
    // Return the y-axis value at specified index
    double atY(int yIndex) const;
 
private:
    class PrivateData;
    PrivateData* m_data;
};
 
#endif  // QWTGRIDRASTERDATA_H