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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>GetFeatureInfoWSR.js</h2>
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<h4>Summary</h4>
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<p>
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No overview generated for 'GetFeatureInfoWSR.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="GetFeatureInfoWSR.html">GetFeatureInfoWSR</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: GetFeatureInfoWSR.js 3887 2008-02-27 18:18:53Z 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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<span class="comment">/**
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* Implements GetFeatureInfo functionality, using the WebServiceRequest
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* tool. This will work with the WMS:GetFeatureInfo request as well as
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* with WFS:GetFeature. This widget can be used as an example on how to
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* write widgets that use the WebServiceRequest functionality.
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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> adair
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* <span class="attrib">@constructor</span>
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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 widget object which this widget is associated with.
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*/</span>
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<span class="reserved">function</span> GetFeatureInfoWSR(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="comment">/** WebServiceRequest controller for this widget */</span>
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<span class="reserved">this</span>.controller = <span class="reserved">this</span>.getProperty(<span class="literal">"mb:controller"</span>);
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<span class="comment">/**
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* tolerance in pixels around the click point for WFS:GetFeature
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* default is 3
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*/</span>
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<span class="reserved">this</span>.tolerance = parseFloat(<span class="reserved">this</span>.getProperty(<span class="literal">"mb:tolerance"</span>, 3));
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<span class="comment">/**
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* GetFeatureInfoWSR control
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* <span class="attrib">@param</span> objRef reference to this object.
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* <span class="attrib">@return</span> {OpenLayers.Control} class of the OL control.
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*/</span>
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<span class="reserved">this</span>.createControl = <span class="reserved">function</span>(objRef) {
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var Control = OpenLayers.Class( OpenLayers.Control, {
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CLASS_NAME: <span class="literal">'mbControl.GetFeatureInfoWSR'</span>,
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type: OpenLayers.Control.TYPE_TOOL
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});
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<span class="reserved">return</span> Control;
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}
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<span class="comment">/**
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* Register click event when button is selected, unregister it when
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* unselected
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* <span class="attrib">@param</span> objRef reference to this widget
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* <span class="attrib">@param</span> selected true if button is selected, false otherwise
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*/</span>
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<span class="reserved">this</span>.doSelect = <span class="reserved">function</span>(objRef, selected) {
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<span class="reserved">if</span> (selected) {
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objRef.targetModel.map.events.register(<span class="literal">'click'</span>, objRef, objRef.doOnClick);
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} <span class="reserved">else</span> {
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objRef.targetModel.map.events.unregister(<span class="literal">'click'</span>, objRef, objRef.doOnClick);
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}
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}
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<span class="comment">/**
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* For GetFeatureInfo, we want to check for queryable layers and only use
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* those.
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* <span class="attrib">@param</span> e OpenLayers click event
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*/</span>
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<span class="reserved">this</span>.doOnClick = <span class="reserved">function</span>(e) {
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objRef = <span class="reserved">this</span>;
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<span class="reserved">if</span> (!objRef.enabled) <span class="reserved">return</span>;
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var controller = config.objects[objRef.controller];
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var layerNameList = new Array();
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var selectedLayer=objRef.targetModel.getParam(<span class="literal">"selectedLayer"</span>);
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var queryList;
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<span class="reserved">if</span> (!selectedLayer) {
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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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queryList = [objRef.targetModel.getLayer(selectedLayer)];
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}
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var llPx = e.xy.add(-objRef.tolerance, objRef.tolerance);
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var urPx = e.xy.add(objRef.tolerance, -objRef.tolerance);
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var ll = objRef.targetModel.map.getLonLatFromPixel(llPx);
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var ur = objRef.targetModel.map.getLonLatFromPixel(urPx);
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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 = Mapbuilder.getProperty(layerNode, <span class="literal">"wmc:Name"</span>, <span class="literal">""</span>);
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var hidden = objRef.targetModel.getHidden(layerName);
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<span class="reserved">if</span> (hidden == 0) { //query only visible layers
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controller.requestStylesheet.setParameter(<span class="literal">"bBoxMinX"</span>, ll.lon);
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controller.requestStylesheet.setParameter(<span class="literal">"bBoxMinY"</span>, ll.lat);
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controller.requestStylesheet.setParameter(<span class="literal">"bBoxMaxX"</span>, ur.lon);
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controller.requestStylesheet.setParameter(<span class="literal">"bBoxMaxY"</span>, ur.lat);
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controller.requestStylesheet.setParameter(<span class="literal">"queryLayer"</span>, layerName);
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objRef.targetModel.setParam(controller.requestName.replace(/:/,<span class="literal">"_"</span>), layerName);
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}
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}
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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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