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/*
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License: LGPL as per: http://www.gnu.org/copyleft/lesser.html
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$Id: Legend.js 3887 2008-02-27 18:18:53Z ahocevar $
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*/
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// Ensure this object's dependancies are loaded.
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mapbuilder.loadScript(baseDir+"/widget/WidgetBaseXSL.js");
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/**
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* Functions to render and update a Legend from a Web Map Context.
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* @constructor
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* @base WidgetBaseXSL
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* @author Cameron Shorter cameronATshorter.net
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* @param widgetNode The widget's XML object node from the configuration document.
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* @param model The model object that this widget belongs to.
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*/
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function Legend(widgetNode, model) {
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WidgetBaseXSL.apply(this,new Array(widgetNode, model));
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this.model.addListener("deleteLayer",this.refresh, this);
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this.model.addListener("moveLayerUp",this.refresh, this);
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this.model.addListener("moveLayerDown",this.refresh, this);
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if (this.autoRefresh) this.model.addListener("addLayer",this.refresh, this);
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/**
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* Override of widget prepaint to set some stylesheet parameters including
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* featureName (for OWS Context) and hidden attribute.
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* @param objRef Pointer to this object.
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*/
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this.prePaint = function(objRef) {
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if (objRef.model.featureName) {
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objRef.stylesheet.setParameter("featureName", objRef.model.featureName );
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objRef.stylesheet.setParameter("hidden", objRef.model.getHidden(objRef.model.featureName).toString() );
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}
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objRef.visibleLayer = Mapbuilder.getProperty(objRef.model.doc, objRef.model.nodeSelectXpath+"[@hidden='0' and @opaque='1']/wmc:Name");
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}
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}
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/**
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* Listener method to paint this widget
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* @param layerName the name of the layer to highlight
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*/
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Legend.prototype.refresh = function(objRef, layerName) {
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objRef.paint(objRef, objRef.id);
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}
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/**
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* Controller method to select a layer
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* @param objRef Pointer to this object.
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* @param layer The selected layer.
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*/
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Legend.prototype.selectLayer = function(objRef,layer) {
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objRef.model.setParam('selectedLayer',layer);
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}
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/**
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* Controller method to select a layer
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* @param objRef Pointer to this object.
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* @param layer The selected layer.
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*/
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Legend.prototype.swapOpaqueLayer = function(layer) {
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this.model.setHidden(this.visibleLayer, true);
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this.model.setHidden(layer, false);
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this.visibleLayer = layer;
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}
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