fix for #742 -- Adds getControl() and removeControl() methods to the map

git-svn-id: http://svn.openlayers.org/trunk/openlayers@3282 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Map.js

@@ -598,6 +598,41 @@ OpenLayers.Map.prototype = {
         }
     },
     
+    /**
+     * @param {String} id ID of the control to return
+     * 
+     * @returns The control from the map's list of controls which has a 
+     *           matching 'id'. If none found, returns null.
+     * @type OpenLayers.Control
+     */    
+    getControl: function (id) {
+        var returnControl = null;
+        for(var i=0; i < this.controls.length; i++) {
+            var control = this.controls[i];
+            if (control.id == id) {
+                returnControl = control;
+                break;
+            }
+        }
+        return returnControl;
+    },
+    
+    /** Remove a control from the map. Removes the control both from the map 
+     *   object's internal array of controls, as well as from the map's 
+     *   viewPort (assuming the control was not added outsideViewport)
+     * 
+     * @param {String} id ID of the control to remove
+     */    
+    removeControl: function (id) {
+        var control = this.getControl(id);
+        if (control) {
+            if (!control.outsideViewport) {
+                this.viewPortDiv.removeChild(control.div)
+            }
+            OpenLayers.Util.removeItem(this.controls, control);
+        }
+    },
+
   /********************************************************/
   /*                                                      */
   /*                  Popup Functions                     */