update map resize functionality to deal with google layer. if ve had a similar checkResize() function, then we would be able to safely resize an OL map with a ve layer in it as well. unfortunately, this is not the case. a bug report i am gonna file

git-svn-id: http://svn.openlayers.org/branches/openlayers/2.0@1275 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer.js

@@ -148,6 +148,12 @@ OpenLayers.Layer.prototype = {
         Object.extend(this, this.options);
     },
     
+    /**
+     * 
+     */
+    onMapResize: function() {
+        //this function can be implemented by subclasses  
+    },
 
     /**
      * @param {OpenLayers.Bounds} bound

lib/OpenLayers/Layer/Google.js

@@ -147,6 +147,13 @@ OpenLayers.Layer.Google.prototype =
         }
     },
 
+    /**
+     * @param {Event} evt
+     */
+    onMapResize: function() {
+        this.gmap.checkResize();  
+    },
+
     /** If we can't load the GMap, then display an error message to the 
      *   user and tell them where to go for help.
      * 

lib/OpenLayers/Map.js

@@ -148,7 +148,7 @@ OpenLayers.Map.prototype = {
             Event.observe(window, 'resize', 
                           this.updateSize.bindAsEventListener(this));
         }
-
+        
         //set the default options
         this.setOptions(options);
 
@@ -470,14 +470,18 @@ OpenLayers.Map.prototype = {
         if (oldSize == null)
             this.size = oldSize = newSize;
         if (!newSize.equals(oldSize)) {
-            // move the layer container so that the map is still centered
-            var dx = (newSize.w - oldSize.w) / 2,
-                dy = (newSize.h - oldSize.h) / 2;
-            var lcStyle = this.layerContainerDiv.style;
-            lcStyle.left = (parseInt(lcStyle.left) + dx) + "px";
-            lcStyle.top  = (parseInt(lcStyle.top ) + dy) + "px";
-            // reset the map center
-            this.layerContainerOrigin = this.center.clone();
+            
+            //notify layers of mapresize
+            for(var i=0; i < this.layers.length; i++) {
+                this.layers[i].onMapResize();                
+            }
+
+            var center = new OpenLayers.Pixel(newSize.w /2, newSize.h / 2);
+            
+            var zoom = this.getZoom();
+            this.zoom = null;
+            this.setCenter(center, zoom);
+            
             // store the new size
             this.size = newSize;
             // the div might have moved on the page, also