comparison layer/WaveformLayer.h @ 274:b9380f679f70

* Fix centre line position
* Fix failure to update overview when generating peaks from wav file
* Provide y-coordinate scale values and differences for spectrum measurement
  mode, and fix values for waveform (inc dB for both)
* Add Printer colour scheme (may be futile)

     virtual bool getValueExtents(float &min, float &max,
                                  bool &log, QString &unit) const;
 
     virtual bool getYScaleValue(const View *v, int y,
                                 float &value, QString &unit) const;
+    
+    virtual bool getYScaleDifference(const View *v, int y0, int y1,
+                                     float &diff, QString &unit) const;
 
     virtual QString toXmlString(QString indent = "",
 				QString extraAttributes = "") const;
 
     void setProperties(const QXmlAttributes &attributes);

 
     /// Return value is number of channels displayed
     size_t getChannelArrangement(size_t &min, size_t &max,
                                  bool &merging, bool &mixing) const;
 
-    int getYForValue(const View *v, Scale scale, float value, size_t channel,
-                     size_t minChannel, size_t maxChannel) const;
-
-    float getValueForY(const View *v, Scale scale, int y,
-                       size_t minChannel, size_t maxChannel) const;
+    int getYForValue(const View *v, float value, size_t channel) const;
+
+    float getValueForY(const View *v, int y, size_t &channel) const;
 
     float        m_gain;
     bool         m_autoNormalize;
     QColor       m_colour;
     bool         m_showMeans;