Add API method for changing an icon's marker image.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@4784 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Icon.js

@@ -106,6 +106,18 @@ OpenLayers.Icon = OpenLayers.Class({
         }
         this.draw();
     },
+    
+    /**
+     * Method: setUrl
+     * 
+     * url - {String} 
+     */
+    setUrl: function(url) {
+        if (url != null) {
+            this.url = url;
+        }
+        this.draw();
+    },
 
     /** 
      * Method: draw

lib/OpenLayers/Marker.js

@@ -171,6 +171,16 @@ OpenLayers.Marker = OpenLayers.Class({
         this.icon.setOpacity(opacity);
     },
 
+    /**
+     * Method: setUrl
+     * Change URL of the Icon Image.
+     * 
+     * url - {String} 
+     */
+    setUrl: function(url) {
+        this.icon.setUrl(url);
+    },    
+
     /** 
      * Method: display
      * Hide or show the icon

tests/test_Marker.html

@@ -73,6 +73,34 @@
         t.eq(parseFloat(marker.icon.imageDiv.style.opacity), 0.5, "marker.setOpacity() works");
         map.destroy();
     }
+    
+    function test_03_Marker_setUrl(t) {
+        t.plan( 2 );
+        
+        var map = new OpenLayers.Map("map");
+
+        var url = "http://octo.metacarta.com/cgi-bin/mapserv";
+        layer = new OpenLayers.Layer.WMS(name, url);
+
+        map.addLayer(layer);
+        
+        mlayer = new OpenLayers.Layer.Markers('Test Layer');
+        map.addLayer(mlayer);
+               
+        map.zoomToExtent(new OpenLayers.Bounds(-50,-50,50,50));
+
+        //onscreen marker
+        var ll = new OpenLayers.LonLat(0,0);
+        var marker = new OpenLayers.Marker(ll);
+        mlayer.addMarker(marker);
+
+        t.ok(marker.icon.imageDiv.firstChild.src.contains("img/marker.png"), "Marker.png is default URL");
+        
+        marker.setUrl("http://example.com/broken.png");
+        t.eq(marker.icon.imageDiv.firstChild.src, "http://example.com/broken.png", "image source changes correctly.");
+
+        map.destroy();
+    }
 
     function test_04_Marker_moveTo(t) {
         t.plan( 6 );