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/*
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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+"/widget/ButtonBase.js");
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/**
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* When this button is selected, clicks on the MapPane trigger a Metacat query with the
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* currently set AOI.
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* @constructor
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* @base ButtonBase
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* @authors P. Mark Anderson anderson@nceas.ucsb.edu, Matthew Perry perry@nceas.ucsb.edu
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* @param widgetNode The widget node from the Config XML file.
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* @param model The model for this widget
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*/
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function AoiMetacatQuery(widgetNode, model) {
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// Extend ButtonBase
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ButtonBase.apply(this, new Array(widgetNode, model))
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// Grab the important values from the config file
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var wfs_proxy = widgetNode.selectSingleNode("mb:wfs_proxy").firstChild.nodeValue;
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var wfs_server = widgetNode.selectSingleNode("mb:wfs_server").firstChild.nodeValue;
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var tolerance = widgetNode.selectSingleNode("mb:pixel_tolerance").firstChild.nodeValue;
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/**
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* Queries metacat and displays the result in a popup window.
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* @param objRef Pointer to this object.
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* @param targetNode The node for the enclosing HTML tag for this widget.
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*/
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this.doAction = function(objRef,targetNode) {
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if (objRef.enabled) {
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var method = "popup";
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var bbox = objRef.targetModel.getParam("aoi");
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if ( bbox!=null) {
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var ul = bbox[0];
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var lr = bbox[1];
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var extent = objRef.targetModel.extent;
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var extbox = extent.model.getBoundingBox();
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var mapwidth_real = extbox[2] - extbox[0];
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var mapwidth_pixel = extent.model.getWindowWidth();
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var res = mapwidth_real / mapwidth_pixel;
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}
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var selectedLayer = objRef.context.getParam("selectedLayer");
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if ( selectedLayer != null ) {
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// Determine the BBOX
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var x1 = ul[0];
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var y1 = lr[1];
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var x2 = lr[0];
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var y2 = ul[1];
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if ( x1 == x2 && y1 == y2 ) {
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// BBOX is really a point; give a bit of wiggle room
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// tolerance is number of pixels to buffer, set in config
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x1 = x1 - tolerance * res;
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y1 = y1 - tolerance * res;
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x2 = x2 + tolerance * res;
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y2 = y2 + tolerance * res;
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}
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var wfs_url = wfs_server + "?request=GetFeature&typename=" + selectedLayer +
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"&BBOX=" + x1 + "," + y1 + "," + x2 + "," + y2;
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var url = wfs_proxy + "?wfsurl=" + escape(wfs_url);
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if (method == 'popup') {
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newwindow = window.open(url,'queryWin','height=600,width=800,status=yes,toolbar=yes,menubar=no,location=yes,resizable=yes,scrollbars=yes');
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if (window.focus) {newwindow.focus()}
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}
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} else {
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alert("Please select a query layer first");
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}
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}
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}
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/**
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* Register for mouseUp events.
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* @param objRef Pointer to this object.
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*/
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this.setMouseListener = function(objRef) {
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if (objRef.mouseHandler) {
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objRef.mouseHandler.model.addListener('mouseup',objRef.doAction,objRef);
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}
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objRef.context=objRef.widgetNode.selectSingleNode("mb:context");
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if (objRef.context){
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alert("got context!");
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objRef.context=eval("config.objects."+objRef.context.firstChild.nodeValue);
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} else {
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//alert("no context in AoiMetacatQuery widget. using mainMap ");
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objRef.context=eval("config.objects.mainMap");
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/*
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var nodes = objRef.widgetNode.childNodes;
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for (var i=0; i<nodes.length; i++) {
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alert(nodes.item(i).nodeType + " // " +
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nodes.item(i).nodeName + " // " +
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nodes.item(i).nodeValue);
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}
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*/
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}
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}
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this.model.addListener( "loadModel", this.setMouseListener, this );
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}
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