openlayers madness

public/lib/OpenLayers/Layer/VirtualEarth.js

@@ -0,0 +1,107 @@
+/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
+ * See http://svn.openlayers.org/trunk/openlayers/license.txt for the full
+ * text of the license. */
+// @require: OpenLayers/Layer.js
+
+// load VE map control script
+document.write("<script src='http://dev.virtualearth.net/mapcontrol/v3/mapcontrol.js'></script>");
+
+
+/**
+ * @class 
+ */
+OpenLayers.Layer.VirtualEarth = Class.create();
+OpenLayers.Layer.VirtualEarth.prototype = 
+  Object.extend( new OpenLayers.Layer(), {
+
+    /** @type Boolean */
+    viewPortLayer: true,
+
+    /** @type VEMap */
+    vemap: null,
+    
+    /**
+     * @constructor
+     * 
+     * @param {str} name
+     */
+    initialize:function(name) {
+        OpenLayers.Layer.prototype.initialize.apply(this, arguments);
+    },
+
+    /** 
+     * @param {OpenLayers.Map} map
+     */
+    setMap:function(map) {
+        OpenLayers.Layer.prototype.setMap.apply(this, arguments);
+
+        // once our layer has been added to the map, we can create the vemap
+        this.map.events.register("addlayer", this, this.loadVEMap);
+    },
+
+    /** Virtual Earth layer is always a base class. 
+     * @type Boolean
+     */
+    isBaseLayer: function() {
+        return true;
+    },
+
+    /** 
+     * @param {OpenLayers.Bounds} bounds
+     * @param {int} zoomChanged
+     */
+    moveTo:function(bounds,zoomChanged) {
+
+        if (this.vemap != null) {
+            var olCenter = this.map.getCenter();
+            var olZoom = this.map.getZoom();
+    
+            this.vemap.SetCenterAndZoom(new VELatLong(olCenter.lat, olCenter.lon),
+                                        olZoom + 1);
+        }
+    },
+
+
+    /**
+     * 
+     */
+    loadVEMap:function() {
+        // create div and set to same size as map
+        var veDiv = OpenLayers.Util.createDiv(this.name);
+        var sz = this.map.getSize();
+        veDiv.style.width = sz.w;
+        veDiv.style.height = sz.h;
+        this.div.appendChild(veDiv);
+
+        // create VEMap, hide nav controls
+        this.vemap = new VEMap(this.name);
+        this.vemap.LoadMap();
+        this.vemap.HideDashboard();
+
+        // catch pans and zooms from VE Map
+        this.vemap.AttachEvent("onendcontinuouspan", 
+                               this.catchPanZoom.bindAsEventListener(this)); 
+        this.vemap.AttachEvent("onendzoom", 
+                               this.catchPanZoom.bindAsEventListener(this)); 
+        
+
+    },
+
+    /**
+     * @param {event} e
+     */
+    catchPanZoom: function(e) { 
+        var veCenter = this.vemap.GetCenter();
+        var veZoom = this.vemap.GetZoomLevel();
+        
+        var olCenter = new OpenLayers.LonLat(veCenter.Longitude,
+                                             veCenter.Latitude);
+                                             
+        this.map.setCenter(olCenter, veZoom - 1);
+        
+    },
+
+
+    /** @final @type String */
+    CLASS_NAME: "OpenLayers.Layer.VirtualEarth"
+});