public/lib/OpenLayers/Tile/Image.js

   1 /* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
   2  * See http://svn.openlayers.org/trunk/openlayers/license.txt for the full
   3  * text of the license. */
   4 // @require: OpenLayers/Tile.js
   5 /**
   6 * @class
   7 */
   8 OpenLayers.Tile.Image = Class.create();
   9 OpenLayers.Tile.Image.prototype =
  10   Object.extend( new OpenLayers.Tile(), {
  11
  12     /** @type DOMElement img */
  13     imgDiv:null,
  14
  15     /**
  16     * @constructor
  17     *
  18     * @param {OpenLayers.Grid} layer
  19     * @param {OpenLayers.Pixel} position
  20     * @param {OpenLayers.Bounds} bounds
  21     * @param {String} url
  22     * @param {OpenLayers.Size} size
  23     */
  24     initialize: function(layer, position, bounds, url, size) {
  25         OpenLayers.Tile.prototype.initialize.apply(this, arguments);
  26     },
  27
  28     destroy: function() {
  29         if ((this.imgDiv != null) && (this.imgDiv.parentNode == this.layer.div)) {
  30             this.layer.div.removeChild(this.imgDiv);
  31         }
  32         this.imgDiv = null;
  33         OpenLayers.Tile.prototype.destroy.apply(this, arguments);
  34     },
  35
  36     /**
  37     */
  38     draw:function(transparent) {
  39         if (false) { // don't actually use the alpha PNG hack right now
  40                      // it has a fiercely bad effect on IE6's performance
  41             // if (transparent) {
  42             this.imgDiv = OpenLayers.Util.createAlphaImageDiv(null,
  43                                                            this.position,
  44                                                            this.size,
  45                                                            this.url,
  46                                                            "absolute");
  47         } else {
  48             this.imgDiv = OpenLayers.Util.createImage(null,
  49                                                       this.position,
  50                                                       this.size,
  51                                                       this.url,
  52                                                       "absolute");
  53         }
  54         this.layer.div.appendChild(this.imgDiv);
  55     },
  56
  57     /** @final @type String */
  58     CLASS_NAME: "OpenLayers.Tile.Image"
  59   }
  60 );