Change Scale control to use getScale() from map.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@1245 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/Scale.js

@@ -13,19 +13,15 @@ OpenLayers.Control.Scale.prototype =
     /** @type DOMElement */
     element: null,
     
-    /** @type String */
-    units: 'dd',
-    
     /**
      * @constructor
      * 
      * @param {DOMElement} element
      * @param {String} base
      */
-    initialize: function(element, units) {
+    initialize: function(element) {
         OpenLayers.Control.prototype.initialize.apply(this, arguments);
         this.element = element;        
-        if (units) this.units = units;
     },
 
     /**
@@ -53,11 +49,9 @@ OpenLayers.Control.Scale.prototype =
      * 
      */
     updateScale: function() {
-        var res = this.map.getResolution();
+        var scale = this.map.getScale();
-        if (!res) return;
+        if (!scale) return;
 
-        var scale = res * OpenLayers.INCHES_PER_UNIT[this.units]
-                        * OpenLayers.DOTS_PER_INCH;
         if (scale >= 9500 && scale <= 950000) {
             scale = Math.round(scale / 1000) + "K";
         } else if (scale >= 950000) {