openlayers madness

[rails.git] / public / lib / OpenLayers / Icon.js

diff --git a/public/lib/OpenLayers/Icon.js b/public/lib/OpenLayers/Icon.js
new file mode 100644 (file)
index 0000000..76a2338
--- /dev/null
+++ b/public/lib/OpenLayers/Icon.js
@@ -0,0 +1,106 @@
+/* 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. */
+/**
+* @class
+*/
+OpenLayers.Icon = Class.create();
+OpenLayers.Icon.prototype = {
+    
+    /** image url
+    * @type String */
+    url: null,
+    
+    /** @type OpenLayers.Size */
+    size:null,
+
+    /** distance in pixels to offset the image when being rendered
+    * @type OpenLayers.Pixel */
+    offset: null,    
+    
+    /** Function to calculate the offset (based on the size) 
+     * @type OpenLayers.Pixel */
+    calculateOffset: null,    
+    
+    /** @type DOMElement */
+    imageDiv: null,
+
+    /** @type OpenLayers.Pixel */
+    px: null,
+    
+    /** 
+    * @constructor
+    *
+    * @param {String} url
+    * @param {OpenLayers.Size} size
+    * @param {Function} calculateOffset
+    */
+    initialize: function(url, size, offset, calculateOffset) {
+        this.url = url;
+        this.size = (size) ? size : new OpenLayers.Size(20,20);
+        this.offset = (offset) ? offset : new OpenLayers.Pixel(0,0);
+        this.calculateOffset = calculateOffset;
+
+        this.imageDiv = OpenLayers.Util.createAlphaImageDiv();
+    },
+    
+    destroy: function() {
+        this.imageDiv = null;
+    },
+
+    /** 
+    * @returns A fresh copy of the icon.
+    * @type OpenLayers.Icon
+    */
+    clone: function() {
+        return new OpenLayers.Icon(this.size, this.url, this.offset);
+    },
+    
+    /**
+     * @param {OpenLayers.Size} size
+     */
+    setSize: function(size) {
+        if (size != null) {
+            this.size = size;
+        }
+        this.draw();
+    },
+
+    /** 
+    * @param {OpenLayers.Pixel} px
+    * 
+    * @return A new DOM Image of this icon set at the location passed-in
+    * @type DOMElement
+    */
+    draw: function(px) {
+        OpenLayers.Util.modifyAlphaImageDiv(this.imageDiv, 
+                                            null, 
+                                            null, 
+                                            this.size, 
+                                            this.url, 
+                                            "absolute");
+        this.moveTo(px);
+        return this.imageDiv;
+    }, 
+
+    /**
+    * @param {OpenLayers.Pixel} px
+    */
+    moveTo: function (px) {
+        //if no px passed in, use stored location
+        if (px != null) {
+            this.px = px;
+        }
+
+        if ((this.px != null) && (this.imageDiv != null)) {
+            if (this.calculateOffset) {
+                this.offset = this.calculateOffset(this.size);  
+            }
+            var offsetPx = this.px.offset(this.offset);
+            OpenLayers.Util.modifyAlphaImageDiv(this.imageDiv, null, offsetPx);
+        }
+    },
+    
+    /** @final @type String */
+    CLASS_NAME: "OpenLayers.Icon"
+};
\ No newline at end of file