comparison layer/SpectrogramLayer.h @ 94:c7ade7ea3cfe

* It turns out we can be more efficient in the spectrogram repaints by
  marking the spectrogram layer as non-scrollable, and using the spectrogram
  cache alone instead of both spectrogram and view caches.

 				QString extraAttributes = "") const;
 
     void setProperties(const QXmlAttributes &attributes);
 
     virtual void setLayerDormant(const View *v, bool dormant);
+
+    virtual bool isLayerScrollable(const View *v) const { return false; }
 
 protected slots:
     void cacheInvalid();
     void cacheInvalid(size_t startFrame, size_t endFrame);