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<a href='http://mapbuilder.sourceforge.net'>Community Map Builder</a> 27 Apr 2008 Overview
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<b><a href='http://mapbuilder.sourceforge.net'>Community Map Builder</a> 27 Apr 2008</b></em>
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<center>
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<h2>WfsGetFeature.js</h2>
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<h4>Summary</h4>
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No overview generated for 'WfsGetFeature.js'<BR/><BR/>
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<td colspan=2><font size="+2">
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<b>Class Summary</b>
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</font></td>
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</tr>
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<tr bgcolor="white" class="TableRowColor">
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<td width="15%"><b><a href="WfsGetFeature.html">WfsGetFeature</a></b></td>
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<td> </td>
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</tr>
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</table>
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<hr/>
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<!-- ========== METHOD SUMMARY =========== -->
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<!-- ========== END METHOD SUMMARY =========== -->
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<pre class="sourceview"><span class="comment">/*
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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: WfsGetFeature.js 3899 2008-03-03 10:33:30Z ahocevar $
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*/</span>
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<span class="comment">
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// Ensure this object's dependancies are loaded.</span>
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mapbuilder.loadScript(baseDir+<span class="literal">"/widget/ButtonBase.js"</span>);
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mapbuilder.loadScript(baseDir+<span class="literal">"/util/openlayers/OpenLayers.js"</span>);
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<span class="comment">/**
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* Builds then sends a WFS GetFeature GET request based on the WMC
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* coordinates and click point.
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* <span class="attrib">@constructor</span>
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* <span class="attrib">@base</span> ButtonBase
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* <span class="attrib">@author</span> Cameron Shorter
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* <span class="attrib">@param</span> widgetNode The XML node in the Config file referencing this object.
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* <span class="attrib">@param</span> model The Context object which this tool is associated with.
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*/</span>
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<span class="reserved">function</span> WfsGetFeature(widgetNode, model) {
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<span class="comment"> // Extend ButtonBase</span>
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ButtonBase.apply(<span class="reserved">this</span>, new Array(widgetNode, model));
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<span class="reserved">this</span>.widgetNode = widgetNode;
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<span class="comment"> // id of the transactionResponseModel</span>
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<span class="reserved">this</span>.trm = <span class="reserved">this</span>.getProperty(<span class="literal">"mb:transactionResponseModel"</span>);
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<span class="reserved">this</span>.httpPayload = new Object({
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method: <span class="literal">"get"</span>,
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postData: null
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});
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<span class="reserved">this</span>.typeName = <span class="reserved">this</span>.getProperty(<span class="literal">'mb:typeName'</span>);
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<span class="reserved">this</span>.maxFeatures = <span class="reserved">this</span>.getProperty(<span class="literal">'mb:maxFeatures'</span>, 1);
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<span class="reserved">this</span>.webServiceUrl= <span class="reserved">this</span>.getProperty(<span class="literal">'mb:webServiceUrl'</span>);
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<span class="reserved">this</span>.webServiceUrl += <span class="reserved">this</span>.webServiceUrl.indexOf(<span class="literal">"?"</span>) > -1 ? <span class="literal">'&'</span> : <span class="literal">'?'</span>;
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<span class="reserved">this</span>.webServiceSrs= new OpenLayers.Projection(<span class="reserved">this</span>.getProperty(<span class="literal">'mb:webServiceSrs'</span>, <span class="literal">"EPSG:4326"</span>));
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<span class="comment">
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// override default cursor by user</span>
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<span class="comment"> // cursor can be changed by spefying a new cursor in config file</span>
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<span class="reserved">this</span>.cursor = <span class="literal">"pointer"</span>;
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<span class="reserved">this</span>.createControl = <span class="reserved">function</span>(objRef) {
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var transactionResponseModel = config.objects[objRef.trm];
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var Control = OpenLayers.Class( OpenLayers.Control, {
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CLASS_NAME: <span class="literal">'mbControl.WfsGetFeature'</span>,
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type: OpenLayers.Control.TYPE_TOOL, // constant from OpenLayers.Control
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tolerance: new Number(objRef.getProperty(<span class="literal">'mb:tolerance'</span>)),
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httpPayload: objRef.httpPayload,
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maxFeatures: objRef.maxFeatures,
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webServiceUrl: objRef.webServiceUrl,
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transactionResponseModel: transactionResponseModel,
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draw: <span class="reserved">function</span>() {
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<span class="reserved">this</span>.handler = new OpenLayers.Handler.Box( <span class="reserved">this</span>,
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{done: <span class="reserved">this</span>.selectBox}, {keyMask: <span class="reserved">this</span>.keyMask} );
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},
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selectBox: <span class="reserved">function</span> (position) {
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var bounds, minXY, maxXY;
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<span class="reserved">if</span> (position instanceof OpenLayers.Bounds) {
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<span class="comment"> // it's a box</span>
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minXY = <span class="reserved">this</span>.map.getLonLatFromPixel(
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new OpenLayers.Pixel(position.left, position.bottom));
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maxXY = <span class="reserved">this</span>.map.getLonLatFromPixel(
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new OpenLayers.Pixel(position.right, position.top));
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} <span class="reserved">else</span> {
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<span class="comment"> // it's a pixel</span>
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minXY = <span class="reserved">this</span>.map.getLonLatFromPixel(
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new OpenLayers.Pixel(position.x-<span class="reserved">this</span>.tolerance, position.y+<span class="reserved">this</span>.tolerance));
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maxXY = <span class="reserved">this</span>.map.getLonLatFromPixel(
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new OpenLayers.Pixel(position.x+<span class="reserved">this</span>.tolerance, position.y-<span class="reserved">this</span>.tolerance));
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}
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bounds = new OpenLayers.Bounds(minXY.lon, minXY.lat, maxXY.lon, maxXY.lat);
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<span class="reserved">if</span> (<span class="reserved">this</span>.map.projection.projCode != <span class="reserved">this</span>.objRef.webServiceSrs.projCode) {
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bounds.transform(<span class="reserved">this</span>.map.projection, <span class="reserved">this</span>.objRef.webServiceSrs);
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}
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var typeName = objRef.typeName;
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<span class="reserved">if</span> (!typeName) {
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var queryList=objRef.targetModel.getQueryableLayers();
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<span class="reserved">if</span> (queryList.length==0) {
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alert(mbGetMessage(<span class="literal">"noQueryableLayers"</span>));
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<span class="reserved">return</span>;
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}
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<span class="reserved">else</span> {
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typeName = <span class="literal">""</span>;
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<span class="reserved">for</span> (var i=0; i<queryList.length; ++i) {
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var layerNode = queryList[i];
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<span class="comment">
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// Get the name of the layer</span>
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var layerName = layerNode.selectSingleNode(<span class="literal">"wmc:Name"</span>);
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layerName=(layerName)?getNodeValue(layerName):<span class="literal">""</span>;
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<span class="comment">
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// Get the layerId. Fallback to layerName if non-existent</span>
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var layerId = layerNode.getAttribute(<span class="literal">"id"</span>) || layerName;
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var hidden = objRef.targetModel.getHidden(layerId);
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<span class="reserved">if</span> (hidden == 0) { //query only visible layers
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<span class="reserved">if</span> (typeName != <span class="literal">""</span>) {
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typeName += <span class="literal">","</span>;
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}
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typeName += layerName;
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}
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}
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}
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}
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<span class="reserved">if</span> (typeName==<span class="literal">""</span>) {
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alert(mbGetMessage(<span class="literal">"noQueryableLayersVisible"</span>));
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<span class="reserved">return</span>;
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}
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<span class="comment">
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// now create request url</span>
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<span class="reserved">this</span>.httpPayload.url = <span class="reserved">this</span>.webServiceUrl+OpenLayers.Util.getParameterString({
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SERVICE: <span class="literal">"WFS"</span>,
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VERSION: <span class="literal">"1.0.0"</span>,
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REQUEST: <span class="literal">"GetFeature"</span>,
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TYPENAME: typeName,
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MAXFEATURES: <span class="reserved">this</span>.maxFeatures,
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BBOX: bounds.toBBOX()
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});
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<span class="reserved">this</span>.transactionResponseModel.newRequest(<span class="reserved">this</span>.transactionResponseModel, <span class="reserved">this</span>.httpPayload);
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}
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});
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<span class="reserved">return</span> Control;
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}
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}
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</pre>
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<b><a href='http://mapbuilder.sourceforge.net'>Community Map Builder</a> 27 Apr 2008</b></em>
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<div class="jsdoc_ctime">Documentation generated by <a href="http://jsdoc.sourceforge.net/" target="_parent">JSDoc</a> on Sun Apr 27 20:30:54 2008</div>
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