comparison layer/SpectrumLayer.h @ 1403:10e768adaee5

Retain consistent min freq (rather than min bin no) when changing fft parameters in spectrum; scale ffts by window size rather than fft size in case of oversampling, to avoid fading out because of scale factor including zero padding

                                           int value) const override;
     virtual RangeMapper *getNewPropertyRangeMapper(const PropertyName &) const override;
     virtual void setProperty(const PropertyName &, int value) override;
     virtual void setProperties(const QXmlAttributes &) override;
 
+    virtual bool setDisplayExtents(double min, double max) override;
+    
     virtual bool getXScaleValue(const LayerGeometryProvider *v, int x,
                                 double &value, QString &unit) const override;
 
     virtual bool getYScaleValue(const LayerGeometryProvider *, int y,
                                 double &value, QString &unit) const override;

     int                     m_windowHopLevel;
     int                     m_oversampling;
     bool                    m_showPeaks;
     mutable bool            m_newFFTNeeded;
 
+    double                  m_freqOfMinBin; // used to ensure accurate
+                                            // alignment when changing
+                                            // fft size
+
     mutable QMutex m_fftMutex;
 
     void setupFFT();
 
     virtual double getBinForFrequency(double freq) const;