73fb43712f
git-svn-id: http://svn.openlayers.org/trunk/openlayers@1510 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
155 lines
4.2 KiB
JavaScript
155 lines
4.2 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/license.txt for the full
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* text of the license. */
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/**
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* @class
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*
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* @requires OpenLayers/Util.js
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*/
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OpenLayers.Feature = Class.create();
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OpenLayers.Feature.prototype= {
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/** @type OpenLayers.Events */
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events:null,
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/** @type OpenLayers.Layer */
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layer: null,
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/** @type String */
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id: null,
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/** @type OpenLayers.LonLat */
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lonlat:null,
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/** @type Object */
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data:null,
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/** @type OpenLayers.Marker */
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marker: null,
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/** @type OpenLayers.Popup */
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popup: null,
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/**
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* @constructor
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*
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* @param {OpenLayers.Layer} layer
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* @param {OpenLayers.LonLat} lonlat
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* @param {Object} data
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*/
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initialize: function(layer, lonlat, data) {
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this.layer = layer;
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this.lonlat = lonlat;
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this.data = (data != null) ? data : new Object();
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this.id = OpenLayers.Util.createUniqueID(this.CLASS_NAME + "_");
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},
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/**
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*
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*/
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destroy: function() {
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//remove the popup from the map
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if ((this.layer != null) && (this.layer.map != null)) {
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if (this.popup != null) {
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this.layer.map.removePopup(this.popup);
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}
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}
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this.events = null;
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this.layer = null;
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this.id = null;
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this.lonlat = null;
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this.data = null;
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if (this.marker != null) {
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this.destroyMarker(this.marker);
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this.marker = null;
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}
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if (this.popup != null) {
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this.destroyPopup(this.popup);
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this.popup = null;
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}
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},
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/**
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* @returns Whether or not the feature is currently visible on screen
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* (based on its 'lonlat' property)
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* @type Boolean
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*/
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onScreen:function() {
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var onScreen = false;
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if ((this.layer != null) && (this.layer.map != null)) {
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var screenBounds = this.layer.map.getExtent();
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onScreen = screenBounds.containsLonLat(this.lonlat);
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}
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return onScreen;
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},
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/**
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* @returns A Marker Object created from the 'lonlat' and 'icon' properties
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* set in this.data. If no 'lonlat' is set, returns null. If no
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* 'icon' is set, OpenLayers.Marker() will load the default image.
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*
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* Note: this.marker is set to return value
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*
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* @type OpenLayers.Marker
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*/
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createMarker: function() {
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var marker = null;
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if (this.lonlat != null) {
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this.marker = new OpenLayers.Marker(this.lonlat, this.data.icon);
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}
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return this.marker;
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},
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/** If user overrides the createMarker() function, s/he should be able
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* to also specify an alternative function for destroying it
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*/
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destroyMarker: function() {
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this.marker.destroy();
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},
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/**
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* @returns A Popup Object created from the 'lonlat', 'popupSize',
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* and 'popupContentHTML' properties set in this.data. It uses
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* this.marker.icon as default anchor.
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*
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* If no 'lonlat' is set, returns null.
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* If no this.marker has been created, no anchor is sent.
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*
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* Note: this.popup is set to return value
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*
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* @type OpenLayers.Popup.AnchoredBubble
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*/
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createPopup: function() {
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if (this.lonlat != null) {
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var id = this.id + "_popup";
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var anchor = (this.marker) ? this.marker.icon : null;
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this.popup = new OpenLayers.Popup.AnchoredBubble(id,
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this.lonlat,
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this.data.popupSize,
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this.data.popupContentHTML,
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anchor);
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}
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return this.popup;
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},
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/** As with the marker, if user overrides the createPopup() function, s/he
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* should also be able to override the destruction
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*/
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destroyPopup: function() {
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this.popup.destroy()
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},
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CLASS_NAME: "OpenLayers.Feature"
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};
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