Metacat

/*

License: LGPL as per: http://www.gnu.org/copyleft/lesser.html

Dependancies: Context

$Id$

*/

// Ensure this object's dependancies are loaded.

mapbuilder.loadScript(baseDir+"/tool/ButtonBase.js");

/**

 * Implements WMS GetFeatureInfo functionality, popping up a query result

 * window when user clicks on map.

 * @constructor

 * @base ButtonBase

 * @author Nedjo

 * @constructor

 * @param toolNode The XML node in the Config file referencing this object.

 * @param model The widget object which this tool is associated with.

 */

function GetFeatureInfo(toolNode, model) {

  // Extend ButtonBase

  var base = new ButtonBase(this, toolNode, model);

  /** Xsl to build a GetFeatureInfo URL */

  this.xsl=new XslProcessor(baseDir+"/tool/GetFeatureInfo.xsl");

  /** Determine whether Query result is returned as HTML or GML */

  // TBD This should be stored in the Config file.

  //this.infoFormat="application/vnd.ogc.gml";

  this.infoFormat="text/html";

  /**

   * Open window with query info.

   * This function is called when user clicks map with Query tool.

   * @param objRef      Pointer to this GetFeatureInfo object.

   * @param targetNode  The node for the enclosing HTML tag for this widget.

   */

  this.doAction = function(objRef,targetNode) {

    if (objRef.enabled) {

      var selectedLayer=objRef.context.getParam("selectedLayer");

      if (selectedLayer==null) {

        alert("Query layer not selected, select a queryable layer in the Legend.");

      }

      else {

 //       objRef.xsl.setParameter("FORMAT", "text/html");

        objRef.xsl.setParameter("queryLayer", selectedLayer);

        objRef.xsl.setParameter("xCoord", targetNode.evpl[0]);

        objRef.xsl.setParameter("yCoord", targetNode.evpl[1]);

        objRef.xsl.setParameter("infoFormat", objRef.infoFormat);

        objRef.xsl.setParameter("featureCount", "1");

        urlNode=objRef.xsl.transformNodeToObject(objRef.context.doc);

        //alert(urlNode);

        url=urlNode.documentElement.firstChild.nodeValue;

        alert("GetFeatureInfo .. : \n url="+url);

        if (objRef.infoFormat=="text/html"){

          window.open(url,'queryWin','height=200,width=300,scrollbars=yes');

        }

      }

    }

  }

  /**

   * Register for mouseUp events.

   * @param objRef  Pointer to this object.

   */

  this.setMouseListener = function(objRef) {

    if (objRef.mouseHandler) {

      objRef.mouseHandler.model.addListener('mouseup',objRef.doAction,objRef);

    }

    objRef.context=objRef.widgetNode.selectSingleNode("mb:context");

    if (objRef.context){

      objRef.context=eval("config.objects."+objRef.context.firstChild.nodeValue);

    }

  }

  config.addListener( "loadModel", this.setMouseListener, this );

}

<?xml version="1.0" encoding="ISO-8859-1"?>

<!--

Description: parses an OGC context document to generate a GetFeatureInfo url

Author:      Nedjo

Licence:     LGPL as specified in http://www.gnu.org/copyleft/lesser.html .

$Id$

$Name$

-->

<xsl:stylesheet version="1.0" xmlns:wmc="http://www.opengis.net/context" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xlink="http://www.w3.org/1999/xlink">

  <xsl:output method="xml"/>

  <xsl:strip-space elements="*"/>

  <!-- parameters to be passed into the XSL -->

  <!-- The name of the WMS GetFeatureInfo layer -->

  <xsl:param name="queryLayer">highways</xsl:param>

  <xsl:param name="xCoord">1</xsl:param>

  <xsl:param name="yCoord">1</xsl:param>

  <xsl:param name="infoFormat">text/html</xsl:param>

  <xsl:param name="featureCount">1</xsl:param>

  <!-- Global variables -->

  <xsl:variable name="bbox">

    <xsl:value-of select="/wmc:ViewContext/wmc:General/wmc:BoundingBox/@minx"/>,<xsl:value-of select="/wmc:ViewContext/wmc:General/wmc:BoundingBox/@miny"/>,<xsl:value-of select="/wmc:ViewContext/wmc:General/wmc:BoundingBox/@maxx"/>,<xsl:value-of select="/wmc:ViewContext/wmc:General/wmc:BoundingBox/@maxy"/>

  </xsl:variable>

  <xsl:variable name="width">

    <xsl:value-of select="/wmc:ViewContext/wmc:General/wmc:Window/@width"/>

  </xsl:variable>

  <xsl:variable name="height">

    <xsl:value-of select="/wmc:ViewContext/wmc:General/wmc:Window/@height"/>

  </xsl:variable>

  <xsl:variable name="srs" select="/wmc:ViewContext/wmc:General/wmc:BoundingBox/@SRS"/>

  <!-- Root template -->

  <xsl:template match="/">

    <url>

      <xsl:apply-templates select="wmc:ViewContext/wmc:LayerList"/>

      <error>URL not calculated for layer=<xsl:value-of select="$queryLayer"/></error>

    </url>

  </xsl:template>

  <!-- Layer template -->

  <xsl:template match="wmc:Layer">

    <xsl:if test="contains($queryLayer,wmc:Name)">

      <!-- Layer variables -->

      <xsl:variable name="version">

        <xsl:value-of select="wmc:Server/@version"/>    

      </xsl:variable>

      <xsl:variable name="baseUrl">

        <xsl:value-of select="wmc:Server/wmc:OnlineResource/@xlink:href"/>    

      </xsl:variable>

      <xsl:variable name="firstJoin">

        <xsl:choose>

          <xsl:when test="substring($baseUrl,string-length($baseUrl))='?'"></xsl:when>

          <xsl:when test="contains($baseUrl, '?')">&amp;</xsl:when> 

          <xsl:otherwise>?</xsl:otherwise>

        </xsl:choose>

      </xsl:variable>

      <!-- Print the URL -->

      <xsl:value-of select="$baseUrl"/><xsl:value-of select="$firstJoin"/>VERSION=<xsl:value-of select="$version"/>&amp;REQUEST=GetFeatureInfo&amp;SRS=<xsl:value-of select="$srs"/>&amp;BBOX=<xsl:value-of select="$bbox"/>&amp;WIDTH=<xsl:value-of select="$width"/>&amp;HEIGHT=<xsl:value-of select="$height"/>&amp;LAYERS=<xsl:value-of select="$queryLayer"/>&amp;FORMAT=<xsl:value-of select="$infoFormat"/>&amp;FEATURE_COUNT=<xsl:value-of select="$featureCount"/>&amp;QUERY_LAYERS=<xsl:value-of select="$queryLayer"/>&amp;X=<xsl:value-of select="$xCoord"/>&amp;Y=<xsl:value-of select="$yCoord"/>

    </xsl:if>

  </xsl:template>

</xsl:stylesheet>

      <FormatList>

        <Format current="1">image/png</Format>

      </FormatList>