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/*
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License: GPL as per: http://www.gnu.org/copyleft/gpl.html
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$Id: LayerControl.js 3607 2007-11-16 05:06:51Z rdewit $
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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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* Widget to allow control of layer odering, visibility, deletion
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* @constructor
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* @base WidgetBaseXSL
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* @author adair
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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 LayerControl(widgetNode, model) {
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WidgetBaseXSL.apply(this,new Array(widgetNode, model));
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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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}
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/**
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* Displays a layer in a preview pane when mouse is over the table row
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* @param layerId the name of the layer to highlight
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*/
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this.highlightLayer = function(layerId) {
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var layer = this.model.map.mbMapPane.oLlayers[layerId].div;
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var previewImage = document.getElementById("previewImage");
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try {
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if (previewImage && layer) previewImage.src = layer.firstChild.firstChild.src;
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} catch(e) {}
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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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this.refresh = function(objRef, layerName) {
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objRef.paint(objRef, objRef.id);
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}
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this.foldUnfoldGroup = function(groupName,id) {
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// context config stuff to maintain group folding over refresh
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var xpathExpression = "//wmc:General/wmc:Extension/wmc:GroupList/wmc:Group[@name='" + groupName + "']";
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//var thisGroupsLayerNodes = model.doc.selectNodes(xpathExpression);
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var thisGroupsNode = model.doc.selectSingleNode(xpathExpression);
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var thisGroupsFoldedState = thisGroupsNode.getAttribute('folded');
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var e =document.getElementById(id);
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if(thisGroupsFoldedState == "1") {
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thisGroupsNode.setAttribute("folded", "0");
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e.value="-";
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} else {
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thisGroupsNode.setAttribute("folded", "1");
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e.value="+";
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}
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}
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/**
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* not working yet
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* @param layerId the name of the layer to highlight
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*/
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this.showLayerMetadata = function(layerId) {
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var metadataWidget = config.objects.layerMetadata;
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if (metadataWidget) {
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metadataWidget.stylesheet.setParameter("featureName",layerId);
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metadataWidget.node = document.getElementById(metadataWidget.htmlTagId);
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metadataWidget.paint(metadataWidget);
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}
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}
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/**
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* Change image source from imageA to imageB
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* @param id id of image tag where we want to change the source
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* @param imageA url of imageA
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* @param imageB url of imageB
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*/
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this.ChangeImage= function (id, imageA, imageB) {
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var indexA=document.getElementById(id).src.indexOf(imageA);
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var indexB=document.getElementById(id).src.indexOf(imageB);
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if (document.getElementById(id) != null) {
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if (indexA != -1) { /* HACK for IE. */
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document.getElementById(id).src=document.getElementById(id).src.substring(0,indexA)+imageB;
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} else {
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document.getElementById(id).src=document.getElementById(id).src.substring(0,indexB)+imageA;
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}
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}
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return;
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}
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/**
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* Display or fold the layer's legend
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* @param id id of legend div
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*/
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this.switchVisibilityById = function (id) {
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e =document.getElementById(id);
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if (e.style.display=="none") {
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e.style.display = "block";
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} else {
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e.style.display = "none";
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}
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}
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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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