Merge pull request #393 from elemoine/393

grid layers may be misplaced

lib/OpenLayers/Layer.js

@@ -275,16 +275,6 @@ OpenLayers.Layer = OpenLayers.Class({
      * {Float}
      */
     minResolution: null,
-    
-    /**
-     * Property: resolution
-     * {Float} Current resolution that the layer is drawn in. This is
-     *     used to determine whether the zoom has changed when calling
-     *     <moveTo> from <redraw>. Subclasses may set this.resolution to
-     *     null prior to calling redraw to force passing zoomChanged
-     *     true to moveTo.
-     */
-    resolution: null,
 
     /**
      * APIProperty: numZoomLevels
@@ -561,8 +551,7 @@ OpenLayers.Layer = OpenLayers.Class({
             var extent = this.getExtent();
 
             if (extent && this.inRange && this.visibility) {
-                var zoomChanged = this.resolution == null ||
-                              this.resolution !== this.map.getResolution();
+                var zoomChanged = true;
                 this.moveTo(extent, zoomChanged, false);
                 this.events.triggerEvent("moveend",
                     {"zoomChanged": zoomChanged});
@@ -587,7 +576,6 @@ OpenLayers.Layer = OpenLayers.Class({
             display = display && this.inRange;
         }
         this.display(display);
-        this.resolution = this.map.getResolution();
     },
 
     /**
@@ -643,8 +631,6 @@ OpenLayers.Layer = OpenLayers.Class({
             
             // deal with gutters
             this.setTileSize();
-
-            this.resolution = null;
         }
     },