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/*
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License: LGPL as per: http://www.gnu.org/copyleft/lesser.html
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Dependancies: Context
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$Id: GetFeatureInfo.js 3906 2008-03-05 10:27:30Z ahocevar $
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*/
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// Ensure this object's dependancies are loaded.
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mapbuilder.loadScript(baseDir+"/widget/ButtonBase.js");
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/**
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* Implements WMS GetFeatureInfo functionality, popping up a query result
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* window when user clicks on map.
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* @constructor
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* @base ButtonBase
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* @author Nedjo
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* @constructor
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* @param toolNode The XML node in the Config file referencing this object.
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* @param model The widget object which this tool is associated with.
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*/
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function GetFeatureInfo(widgetNode, model) {
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// Extend ButtonBase
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ButtonBase.apply(this, new Array(widgetNode, model));
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/** Xsl to build a GetFeatureInfo URL */
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this.xsl = new XslProcessor(
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this.getProperty("mb:stylesheet", baseDir+"/tool/GetFeatureInfo.xsl"));
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/**
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* Determine whether Query result is returned as text, HTML or GML
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* This is usually text/plain, text/html or application/vnd.ogc.gml
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*/
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this.infoFormat = this.getProperty("mb:infoFormat", "application/vnd.ogc.gml");
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// Get the value for featureCount from the configfile
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this.featureCount = this.getProperty("mb:featureCount", 1);
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this.cursor = "pointer";
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/**
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* GetFeatureInfo control
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* @param objRef reference to this object.
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* @return {OpenLayers.Control} class of the OL control.
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*/
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this.createControl = function(objRef) {
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var Control = OpenLayers.Class( OpenLayers.Control, {
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CLASS_NAME: 'mbControl.GetFeatureInfo',
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type: OpenLayers.Control.TYPE_TOOL,
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draw: function() {
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this.handler = new OpenLayers.Handler.Box( this,
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{done: this.zoomBox}, {keyMask: this.keyMask} );
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},
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zoomBox: function(position) {
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var objRef = this.objRef
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if (objRef.enabled) {
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var x,y;
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if (position instanceof OpenLayers.Bounds) {
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x = position.left + (position.right - position.left) / 2;
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y = position.top + (position.bottom - position.top) / 2;
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} else {
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x = position.x;
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y = position.y;
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}
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objRef.targetModel.deleteTemplates();
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var selectedLayer=objRef.targetContext.getParam("selectedLayer");
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if (selectedLayer==null) {
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var queryList=objRef.targetContext.getQueryableLayers();
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if (queryList.length==0) {
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alert(mbGetMessage("noQueryableLayers"));
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return;
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}
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else {
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for (var i=0; i<queryList.length; ++i) {
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var layerNode = queryList[i];
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// Get the name of the layer
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var layerName = Mapbuilder.getProperty(layerNode, "wmc:Name", "");
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// Get the layerId. Fallback to layerName if non-existent
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var layerId = layerNode.getAttribute("id") || layerName;
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var hidden = objRef.targetContext.getHidden(layerId);
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if (hidden == 0) { //query only visible layers
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objRef.xsl.setParameter("queryLayer", layerName);
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objRef.xsl.setParameter("layer",layerName);
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objRef.xsl.setParameter("xCoord", x);
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objRef.xsl.setParameter("yCoord", y);
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objRef.xsl.setParameter("infoFormat", objRef.infoFormat);
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objRef.xsl.setParameter("featureCount", objRef.featureCount);
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urlNode=objRef.xsl.transformNodeToObject(objRef.targetContext.doc);
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url=getNodeValue(urlNode.documentElement);
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httpPayload = new Object();
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httpPayload.url = url;
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httpPayload.method="get";
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httpPayload.postData=null;
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objRef.targetModel.newRequest(objRef.targetModel,httpPayload);
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}
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}
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}
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}
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else {
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objRef.xsl.setParameter("queryLayer", selectedLayer);
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objRef.xsl.setParameter("layer", layerName);
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objRef.xsl.setParameter("xCoord", x);
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objRef.xsl.setParameter("yCoord", y);
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objRef.xsl.setParameter("infoFormat", objRef.infoFormat);
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objRef.xsl.setParameter("featureCount", objRef.featureCount);
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var urlNode=objRef.xsl.transformNodeToObject(objRef.targetContext.doc);
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var url=getNodeValue(urlNode.documentElement);
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if (objRef.infoFormat=="text/html"){
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window.open(url,'queryWin','height=200,width=300,scrollbars=yes');
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} else {
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var httpPayload = new Object();
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httpPayload.url = url;
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httpPayload.method="get";
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httpPayload.postData=null;
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objRef.targetModel.newRequest(objRef.targetModel,httpPayload);
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}
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}
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}
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}
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});
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return Control;
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}
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}
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