adding determineQuadrant() function to OpenLayers.Bounds. Tests included.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@334 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Util.js

@@ -413,6 +413,24 @@ OpenLayers.Bounds.prototype = {
                          : (inTop && inLeft && inBottom && inRight);
     },
 
+    /** 
+     * @param {OpenLayers.LonLat} lonlat
+     *
+     * @returns The quadrant ("br" "tr" "tl" "bl") of the bounds in which 
+     *           the coordinate lies.
+     * @type String
+     */
+    determineQuadrant: function(lonlat) {
+    
+        var quadrant = "";
+        var center = this.getCenterLonLat();
+        
+        quadrant += (lonlat.lat < center.lat) ? "b" : "t";
+        quadrant += (lonlat.lon < center.lon) ? "l" : "r";
+    
+        return quadrant; 
+    },
+
     /** @final @type String */
     CLASS_NAME: "OpenLayers.Bounds"
 };