comparison layer/Layer.h @ 260:6d113226bb4c

* a bit more work on measurement tool mode
* use arrow cursors on thumbwheels and panner in pane HUD

                                    float /* max */) {
         return false;
     }
 
     /**
+     * Return the value and unit at the given x coordinate in the
+     * given view.  This is for descriptive purposes using the
+     * measurement tool.  The default implementation works correctly
+     * if the layer hasTimeXAxis().
+     */
+    virtual bool getXScaleValue(View *v, int x,
+                                float &value, QString &unit) const;
+
+    /** 
+     * Return the value and unit at the given y coordinate in the
+     * given view.
+     */
+    virtual bool getYScaleValue(View *, int /* y */,
+                                float &/* value */, QString &/* unit */) const {
+        return false;
+    }
+
+    /**
      * Get the number of vertical zoom steps available for this layer.
      * If vertical zooming is not available, return 0.  The meaning of
      * "zooming" is entirely up to the layer -- changing the zoom
      * level may cause the layer to reset its display extents or
      * change another property such as display gain.  However, layers