ee1455c399
git-svn-id: http://svn.openlayers.org/tags/openlayers/release-2.5-rc4@4799 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
83 lines
2.6 KiB
JavaScript
83 lines
2.6 KiB
JavaScript
/* Copyright (c) 2006-2007 MetaCarta, Inc., published under the BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/release-license.txt
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* for the full text of the license. */
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/**
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* @requires OpenLayers/Control.js
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*
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* Class: OpenLayers.Control.Attribution
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* Add attribution from layers to the map display. Uses 'attribution' property
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* of each layer.
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*/
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OpenLayers.Control.Attribution =
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OpenLayers.Class(OpenLayers.Control, {
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/**
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* APIProperty: seperator
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* {String} String used to seperate layers.
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*/
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separator: ", ",
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/**
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* Constructor: OpenLayers.Control.Attribution
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*
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* Parameters:
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* options - {Object} Options for control.
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*/
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initialize: function(options) {
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OpenLayers.Control.prototype.initialize.apply(this, arguments);
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},
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/**
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* Method: destroy
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* Destroy control.
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*/
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destroy: function() {
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this.map.events.unregister("removelayer", this, this.updateAttribution);
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this.map.events.unregister("addlayer", this, this.updateAttribution);
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this.map.events.unregister("changelayer", this, this.updateAttribution);
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this.map.events.unregister("changebaselayer", this, this.updateAttribution);
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OpenLayers.Control.prototype.destroy.apply(this, arguments);
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},
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/**
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* Method: draw
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* Initialize control.
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*
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* Returns:
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* {DOMElement} A reference to the DIV DOMElement containing the control
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*/
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draw: function() {
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OpenLayers.Control.prototype.draw.apply(this, arguments);
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this.map.events.register('changebaselayer', this, this.updateAttribution);
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this.map.events.register('changelayer', this, this.updateAttribution);
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this.map.events.register('addlayer', this, this.updateAttribution);
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this.map.events.register('removelayer', this, this.updateAttribution);
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this.updateAttribution();
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return this.div;
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},
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/**
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* Method: updateAttribution
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* Update attribution string.
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*/
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updateAttribution: function() {
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var attributions = [];
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if (this.map && this.map.layers) {
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for(var i=0; i < this.map.layers.length; i++) {
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var layer = this.map.layers[i];
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if (layer.attribution && layer.getVisibility()) {
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attributions.push( layer.attribution );
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}
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}
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this.div.innerHTML = attributions.join(this.separator);
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}
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},
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/** @final @type String */
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CLASS_NAME: "OpenLayers.Control.Attribution"
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});
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