Added setTileSize() method to Layer.Grid. Also, added clone() method to Layer.WMS to make up for lack of a separate data source class.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@63 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/Grid.js

@@ -14,7 +14,7 @@ OpenLayers.Layer.Grid.prototype = Object.extend( new OpenLayers.Layer(), {
     // this is an array of rows, each row is an array of tiles
     grid: null,
 
-    DEFAULT_TILE_SIZE: new OpenLayers.Size(256,256),
+    tileSize: new OpenLayers.Size(256,256),
 
     /**
     * @param {str} name
@@ -25,8 +25,12 @@ OpenLayers.Layer.Grid.prototype = Object.extend( new OpenLayers.Layer(), {
         OpenLayers.Layer.prototype.initialize.apply(this, [name]);
         this.url = url;
         this.params = params;
-        this.tileSize = this.DEFAULT_TILE_SIZE;
     },
+
+    setTileSize: function (size) {
+        this.tileSize = size.copyOf();
+    },
+
     /** 
      * moveTo
      * moveTo is a function called whenever the map is moved. All the moving