diff --git a/lib/OpenLayers/Layer/EventPane.js b/lib/OpenLayers/Layer/EventPane.js new file mode 100644 index 0000000000..67ac560149 --- /dev/null +++ b/lib/OpenLayers/Layer/EventPane.js @@ -0,0 +1,103 @@ +/* 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.Layer.EventPane = Class.create(); +OpenLayers.Layer.EventPane.prototype = Object.extend(new OpenLayers.Layer, { + /** + * @constructor + * + * @param {String} name + * @param {Object} options Hashtable of extra options to tag onto the layer + */ + initialize: function(name, options) { + if (arguments.length > 0) { + + //store a copy of the custom options for later cloning + this.options = Object.extend(new Object(), options); + + //add options to layer + Object.extend(this, this.options); + + this.name = name; + + //generate unique id based on name + this.id = OpenLayers.Util.createUniqueID("Layer_"); + + if (this.div == null) { + this.div = OpenLayers.Util.createDiv(); + this.div.style.width = "100%"; + this.div.style.height = "100%"; + } + } + }, + + /** + * @returns An exact clone of this OpenLayers.Layer + * @type OpenLayers.Layer + */ + clone: function (obj) { + + if (obj == null) { + obj = new OpenLayers.Layer(this.name, this.options); + } + + // catch any randomly tagged-on properties + obj = OpenLayers.Util.applyDefaults(obj, this); + + // a cloned layer should never have its map property set + // because it has not been added to a map yet. + obj.map = null; + + return obj; + }, + + /** Set the map property for the layer. This is done through an accessor + * so that subclasses can override this and take special action once + * they have their map variable set. + * + * @param {OpenLayers.Map} map + */ + setMap: function(map) { + this.map = map; + + var properties = new Array( + 'projection', 'minExtent', 'maxExtent', + 'minScale', 'maxScale', + 'maxResolution', 'minResolution', + 'minZoomLevel', 'maxZoomLevel', 'units', + 'scales', 'resolutions' + + ); + for(var i=0; i < properties.length; i++) { + if (this[properties[i]] == null) { + this[properties[i]] = this.map[properties[i]]; + } + } + }, + + /** + * @param {Boolean} visible + * @param {Boolean} noEvent + */ + setVisibility: function(visible, noEvent) { + if (visible != this.getVisibility()) { + this.div.style.display = (visible) ? "block" : "none"; + if ((visible) && (this.map != null)) { + var extent = this.map.getExtent(); + if (extent != null) { + this.moveTo(this.map.getExtent()); + } + } + if ((this.map != null) && + ((noEvent == null) || (noEvent == false))) { + this.map.events.triggerEvent("changelayer"); + } + } + }, + + /** @final @type String */ + CLASS_NAME: "OpenLayers.Layer.EventPane" +});