comparison layer/Layer.h @ 583:4c484636d5ec

Record and show any error that occurs during layer processing (e.g. spectrogram layer runs out of disc space for feature files)

      * isReady(int *) call.  The view may choose to show a progress
      * meter if it finds that this returns < 100 at any given moment.
      */
     virtual int getCompletion(View *) const { return 100; }
 
+    /**
+     * Return an error string if any errors have occurred while
+     * loading or processing data for the given view.  Return the
+     * empty string if no error has occurred.
+     */
+    virtual QString getError(View *) const { return ""; }
+
     virtual void setObjectName(const QString &name);
 
     /**
      * Convert the layer's data (though not those of the model it
      * refers to) into XML for file output.  This class implements the