Add buttons to the PanZoom control which currently allow you to zoom to any level. Add a 'zoomTo' function that

allows you to specify a level. This will need to be refactored: Possibly the zoom control will become part of a 
subclass of PanZoom, "largePanZoom", which has a smaller set of controls.

Also add a DEFAULT_ZOOM_LEVELS setting, and an accesssor for said setting.


git-svn-id: http://svn.openlayers.org/trunk/openlayers@23 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Map.js

@@ -7,6 +7,9 @@
 OpenLayers.Map = Class.create();
 OpenLayers.Map.prototype = {
 
+    // int zoom levels, used to draw zoom dragging control
+    DEFAULT_ZOOM_LEVELS: 16,
+
     // OpenLayers.Bounds
     DEFAULT_FULL_EXTENT: new OpenLayers.Bounds(-90, -180, 90, 180),
 
@@ -170,6 +173,10 @@ OpenLayers.Map.prototype = {
     getFullExtent: function () {
         return this.DEFAULT_FULL_EXTENT;
     },
+    
+    getZoomLevels: function() {
+        return this.DEFAULT_ZOOM_LEVELS;
+    },
 
     /**
     * @param {OpenLayers.Bounds} bounds
@@ -244,6 +251,15 @@ OpenLayers.Map.prototype = {
         
     },
     
+    /**
+     * zoomTo
+     * Set Zoom To int
+     */
+    zoomTo: function(zoom) {
+            this.zoom = zoom;
+            this.moveToNewExtent(true);
+    },
+
     /**
      * zoomOut
      * Decrease zoom level by one.