Fix GMap initialization sequence when resizing previously invisible

layers. r=tschaub (pullup #1797)


git-svn-id: http://svn.openlayers.org/trunk/openlayers@9333 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/Google.js

@@ -212,22 +212,24 @@ OpenLayers.Layer.Google = OpenLayers.Class(
      * evt - {Event}
      */
     onMapResize: function() {
-        this.windowResized = true;
         if(this.visibility) {
-            this.checkResize();
-        }
-    },
-
-    /**
-     * APIMethod: checkResize
-     * Check if the map has been resized, and if the Google Maps object is ready for checkResize.
-     * If the mapObject.getSize() equals the layer div's offset size, or if mapObject.getCenter()
-     * is null, the mapObject.checkResize() will fail.
-     */
-    checkResize: function() {
-        if (this.windowResized && this.div.style.display != "none" && this.mapObject.getCenter()) {
             this.mapObject.checkResize();
-            this.windowResized = false;
+        } else {
+            // workaround for resizing of invisible layers where
+            // GMap2.checkResize() does not work. We need to load all tiles
+            // for the old div size, then checkResize(), and then call
+            // layer.moveTo() to trigger GMap.setCenter() (which will finish
+            // the GMap initialization).
+            if(!this._resized) {
+                var layer = this;
+                var handle = GEvent.addListener(this.mapObject, "tilesloaded", function() {
+                    GEvent.removeListener(handle);
+                    delete layer._resized;
+                    layer.mapObject.checkResize();
+                    layer.moveTo(layer.map.getCenter(), layer.map.getZoom());
+                })
+            }
+            this._resized = true;
         }
     },
 
@@ -240,7 +242,6 @@ OpenLayers.Layer.Google = OpenLayers.Class(
      */
     display: function(display) {
         OpenLayers.Layer.EventPane.prototype.display.apply(this, arguments);
-        this.checkResize();
         this.termsOfUse.style.display = this.div.style.display;
         this.poweredBy.style.display = this.div.style.display;
     },
@@ -263,22 +264,7 @@ OpenLayers.Layer.Google = OpenLayers.Class(
         }
         OpenLayers.Layer.EventPane.prototype.removeMap.apply(this, arguments);
     },
-
-    /**
-     * Method: moveTo
-     * Handle calls to move the layer.
-     *
-     * Parameters:
-     * bound - {<OpenLayers.Bounds>}
-     * zoomChanged - {Boolean} Tells when zoom has changed, as layers have to
-     *     do some init work in that case.
-     * dragging - {Boolean}
-     */
-    moveTo:function(bounds, zoomChanged, dragging) {
-        OpenLayers.Layer.EventPane.prototype.moveTo.apply(this, arguments);
-        this.checkResize();
-    },
-
+    
     /**
      * APIMethod: getZoomForExtent
      *