comparison layer/SpectrogramLayer.h @ 283:86a112b5b319

* Make it possible to "measure" a feature on the spectrogram by double-
  clicking in measure mode
* Make shift-click-drag (for zoom to region) work in measure mode as well
  as navigate mode.  It would be nice to be able to shift-doubleclick to
  zoom on a feature directly using a combination of these last two features,
  but that isn't possible yet.
* Make Del delete the measurement under the mouse pointer.

     virtual QString getFeatureDescription(View *v, QPoint &) const;
 
     virtual bool snapToFeatureFrame(View *v, int &frame,
 				    size_t &resolution,
 				    SnapType snap) const;
+
+    virtual void measureDoubleClick(View *, QMouseEvent *);
 
     virtual bool hasLightBackground() const;
 
     void setModel(const DenseTimeValueModel *model);