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/*
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Author: Cameron Shorter cameronATshorter.net
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License: LGPL as per: http://www.gnu.org/copyleft/lesser.html
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$Id$
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*/
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// Ensure this object's dependancies are loaded.
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mapbuilder.loadScript(baseDir+"/model/Proj.js");
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mapbuilder.loadScript(baseDir+"/widget/MapContainerBase.js");
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mapbuilder.loadScript(baseDir+"/widget/Popup.js");
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mapbuilder.loadScript(baseDir+"/widget/FeatureFactory.js");
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// Resource: http://www.bazon.net/mishoo/articles.epl?art_id=824
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/**
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* Render GML point geometery into HTML. This is a MapContainer widget.
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* Other Geometries could be handled if there was some way to get a point
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* out of it (e.g. polygon centroid).
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* This widget places an image at the specified point on the map.
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* It also places a highlight image at the same spot and registers a
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* hihglightFeature event on the model, where the featureId is set as the model param.
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* Models using this widget must implement getFeatureNodes(),
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* @constructor
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* @base MapContainerBase
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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 GmlPointRenderer(widgetNode, model) {
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//this.normalImage = widgetNode.selectSingleNode("mb:normalImage").firstChild.nodeValue;
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//this.highlightImage = widgetNode.selectSingleNode("mb:highlightImage").firstChild.nodeValue;
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this.popup = new Popup( widgetNode, model );
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this.featureFactory = new FeatureFactory(widgetNode, model);
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/**
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* Clear all markers
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*/
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this.clearWidget = function(objRef) {
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// call feature factory since we do not know the implementation
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this.featureFactory.clearFeatures();
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}
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/** draw the points by putting the image at the point
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* @param objRef a pointer to this widget object
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*/
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this.paint = function(objRef) {
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// cleanup first
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objRef.clearWidget(objRef );
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if (objRef.model.doc && objRef.node) {
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var containerProj = new Proj(objRef.containerModel.getSRS());
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var features = objRef.model.getFeatureNodes();
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for (var i=0; i<features.length; ++i) {
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var feature = features[i];
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var title = objRef.model.getFeatureName(feature);
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var itemId = objRef.model.getFeatureId(feature); //or feature id's for feature collections?
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var point = objRef.model.getFeaturePoint(feature);
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if( (point[0] == 0) && (point[1] == 0 )) {
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return;
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}
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point = containerProj.Forward(point);
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point = objRef.containerModel.extent.getPL(point);
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// get the popup info from stylesheet
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var popupStr = objRef.popup.transform( objRef.popup, feature );
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// create a point feature
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objRef.featureFactory.createFeature( objRef, 'POINT', point, itemId, title, popupStr );
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}
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}
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}
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this.stylesheet = new XslProcessor(baseDir+"/widget/Null.xsl");
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var base = new MapContainerBase(this,widgetNode,model);
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/** highlights the selected feature by switching to the highlight image
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* @param objRef a pointer to this widget object
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*/
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this.highlight = function(objRef, featureId) {
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var normalImageDiv = document.getElementById(featureId+"_normal");
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normalImageDiv.style.visibility = "hidden";
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var highlightImageDiv = document.getElementById(featureId+"_highlight");
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highlightImageDiv.style.visibility = "visible";
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}
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this.model.addListener("highlightFeature",this.highlight, this);
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/** highlights the selected feature by switching to the highlight image
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* @param objRef a pointer to this widget object
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*/
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this.dehighlight = function(objRef, featureId) {
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var normalImageDiv = document.getElementById(featureId+"_normal");
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normalImageDiv.style.visibility = "visible";
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var highlightImageDiv = document.getElementById(featureId+"_highlight");
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highlightImageDiv.style.visibility = "hidden";
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}
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this.model.addListener("dehighlightFeature",this.dehighlight, this);
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}
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