move 'image' member from marker down to Icon.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@446 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Icon.js

@@ -15,6 +15,9 @@ OpenLayers.Icon.prototype = {
     * @type OpenLayers.Pixel */
     offset: null,    
     
+    /** @type DOMElement */
+    image: null,
+    
     /** 
     * @constructor
     *
@@ -27,6 +30,13 @@ OpenLayers.Icon.prototype = {
         this.url = url;
         this.offset = (offset) ? offset 
                                : new OpenLayers.Pixel(0,0); 
+
+        this.image = OpenLayers.Util.createAlphaImageDiv(null,
+                                                 null,
+                                                 this.size,
+                                                 this.url,
+                                                 "absolute"
+                                                );
     },
 
     /** 
@@ -37,6 +47,28 @@ OpenLayers.Icon.prototype = {
         return new OpenLayers.Icon(this.size, this.url, this.offset);
     },
     
+    /** 
+    * @param {OpenLayers.Pixel} px
+    * 
+    * @return A new DOM Image of this icon set at the location passed-in
+    * @type DOMElement
+    */
+    draw: function(px) {
+        this.moveTo(px);
+        return this.image;
+    }, 
+
+    /**
+    * @param {OpenLayers.Pixel} px
+    */
+    moveTo: function (px) {
+        if ((px != null) && (this.image != null)) {
+            offsetPx = px.offset(this.offset);
+            this.image.style.left = offsetPx.x + "px"; 
+            this.image.style.top = offsetPx.y + "px"
+        }
+    },
+    
     /** @final @type String */
     CLASS_NAME: "OpenLayers.Icon"
 };