comparison base/ZoomConstraint.h @ 1552:05c3fbaec8ea

Introduce RelativelyFineZoomConstraint, which encodes more-or-less the scheme that was already used for the horizontal thumbwheel in the pane (which overrode the layers' own zoom constraints unless they said they couldn't support any other)

      */
     virtual ZoomLevel getNearestZoomLevel(ZoomLevel requestedZoomLevel,
                                           RoundingDirection = RoundNearest)
         const
     {
+        // canonicalise
+        if (requestedZoomLevel.level == 1) {
+            requestedZoomLevel.zone = ZoomLevel::FramesPerPixel;
+        }
         if (getMaxZoomLevel() < requestedZoomLevel) return getMaxZoomLevel();
 	else return requestedZoomLevel;
     }
 
     /**