Add a new option to Control.OverviewMap to start maximized. r=bartvde (closes #2746)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@10674 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/OverviewMap.js

@@ -120,6 +120,12 @@ OpenLayers.Control.OverviewMap = OpenLayers.Class(OpenLayers.Control, {
      */
     resolutionFactor: 1,
 
+    /**
+     * APIProperty: maximized
+     * {Boolean} Start as maximized (visible). Defaults to false.
+     */
+    maximized: false,
+
     /**
      * Constructor: OpenLayers.Control.OverviewMap
      * Create a new overview map
@@ -288,7 +294,10 @@ OpenLayers.Control.OverviewMap = OpenLayers.Class(OpenLayers.Control, {
         }
         
         this.map.events.register('moveend', this, this.update);
-
+        
+        if (this.maximized) {
+            this.maximizeControl();
+        }
         return this.div;
     },