Fix a problem determining zoom levels. Updated some docs.

lib/OpenLayers/Control/UTFGrid.js

@@ -169,14 +169,13 @@ OpenLayers.Control.UTFGrid = OpenLayers.Class(OpenLayers.Control, {
             this.lastXy = evt.xy;
         }
         
-        var newHtml = this.formatOutput(lonLat);
-
         var layers = this.findLayers();
         if (layers.length > 0) {
             var layer;
             for (var i=0, len=layers.length; i<len; i++) {
                 layer = layers[i];
                 var info = layer.getTileInfo( lonLat );
+                //MP TODO make function
                 if (this.debugElement) {
                     var debug = "<ul>";
                     debug += "<li>i :" + info.i + "</li>";
@@ -192,7 +191,7 @@ OpenLayers.Control.UTFGrid = OpenLayers.Class(OpenLayers.Control, {
                 }
                 var tile = info.tile;
                 /*
-                TODO Sanity checks
+                MP TODO Sanity checks
                 if ((Math.floor(info.i) >= tileSize) ||
                     (Math.floor(info.j) >= tileSize)) alert("TOO BIG");
                 */
@@ -217,6 +216,7 @@ OpenLayers.Control.UTFGrid = OpenLayers.Class(OpenLayers.Control, {
 
     /**
      * Method: callback
+     * MP TODO
      * Takes the attrs and does somethings with them
      * this is a default (intended to be overridden)
      */
@@ -259,28 +259,11 @@ OpenLayers.Control.UTFGrid = OpenLayers.Class(OpenLayers.Control, {
         }
     },
 
-    /**
-     * Method: formatOutput
-     * Override to provide custom display output
-     *
-     * Parameters:
-     * lonLat - {<OpenLayers.LonLat>} Location to display
-     */
-    formatOutput: function(lonLat) {
-        var digits = parseInt(this.numDigits);
-        var newHtml =
-            this.prefix +
-            lonLat.lon.toFixed(digits) +
-            this.separator + 
-            lonLat.lat.toFixed(digits) +
-            this.suffix;
-        return newHtml;
-    },
-
     /**
      * Method: findLayers
      * Internal method to get the layers, independent of whether we are
      *     inspecting the map or using a client-provided array
+     *     MP TODO respect list of user-supplied candidates
      */
     findLayers: function() {
         var candidates = this.layers || this.map.layers;