Metacat

/*

Author:       Cameron Shorter cameronATshorter.net

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

$Id$

*/

// Ensure this object's dependancies are loaded.

mapbuilder.loadScript(baseDir+"/model/Proj.js");

mapbuilder.loadScript(baseDir+"/widget/MapContainerBase.js");

mapbuilder.loadScript(baseDir+"/util/wz_jsgraphics/wz_jsgraphics.js");

/**

 * Render GML into HTML.

 * Calls GmlCoordinates2Coord.xsl to convert GML to a simpler form.

 * Calls GmlRendererWZ.xsl to convert GML to wz_jsgraphics graphic function

 * calls.

 * this.targetModel references the context model with

 * width/height attributes.

 * @constructor

 * @base MapContainerBase

 * @param widgetNode  The widget's XML object node from the configuration document.

 * @param model       The model object that this widget belongs to.

 */

function GmlRendererWZ(widgetNode, model) {

  WidgetBase.apply(this,new Array(widgetNode, model));

  // Set this.stylesheet

  // Defaults to "widget/<widgetName>.xsl" if not defined in config file.

  var styleNode = widgetNode.selectSingleNode("mb:stylesheet");

  if (styleNode ) {

    this.stylesheet = new XslProcessor(styleNode.firstChild.nodeValue,model.namespace);

  } else {

    this.stylesheet = new XslProcessor(baseDir+"/widget/"+widgetNode.nodeName+".xsl",model.namespace);

  }

  this.paint = function(objRef) {

    if (objRef.model.doc && objRef.node && objRef.containerModel && objRef.containerModel.doc) {

      objRef.stylesheet.setParameter("modelUrl", objRef.model.url);

      //if (objRef.debug) alert("source:"+Sarissa.serialize(objRef.model.doc));

      objRef.resultDoc = objRef.model.doc; // resultDoc sometimes modified by prePaint()

      objRef.prePaint(objRef);

      //confirm inputs

      if (objRef.debug) alert("prepaint:"+Sarissa.serialize(objRef.resultDoc));

      if (objRef.debug) alert("stylesheet:"+Sarissa.serialize(objRef.stylesheet.xslDom));

      //set to output to a temporary node

      //hack to get by doc parsing problem in IE

      //the firstChild of tempNode will be the root element output by the stylesheet

      var outputNode = document.getElementById( objRef.outputNodeId );

      var tempNode = document.createElement("DIV");

      tempNode.style.position="absolute";

      tempNode.style.top=0;

      tempNode.style.left=0;

      tempNode.style.zindex=300;

      tempNode.setAttribute("id", objRef.outputNodeId);

      //look for this widgets output and replace if found,

      //otherwise append it

      if (outputNode) {

        objRef.node.replaceChild(tempNode,outputNode);

      } else {

        objRef.node.appendChild(tempNode);

      }

      jsNode = objRef.stylesheet.transformNodeToObject(objRef.resultDoc);

      js=jsNode.selectSingleNode("js").firstChild.nodeValue;

      if (objRef.debug) alert("javascript eval:"+js);

      objRef.model.setParam("modelStatus","rendering");

      eval(js);

      objRef.postPaint(objRef);

    }

  }

  this.model.addListener("refresh",this.paint, this);

  MapContainerBase.apply(this,new Array(widgetNode, model));

  // Set stylesheet parameters for all the child nodes from the config file

  for (var j=0;j<widgetNode.childNodes.length;j++) {

    if (widgetNode.childNodes[j].firstChild

      && widgetNode.childNodes[j].firstChild.nodeValue)

    {

      this.stylesheet.setParameter(

        widgetNode.childNodes[j].nodeName,

        widgetNode.childNodes[j].firstChild.nodeValue);

    }

  }

  // Set widget text values as parameters 

  if (config.widgetText) {

    var textNodeXpath = "/mb:WidgetText/mb:widgets/mb:" + widgetNode.nodeName;

    var textParams = config.widgetText.selectNodes(textNodeXpath+"/*");

    for (var j=0;j<textParams.length;j++) {

      this.stylesheet.setParameter(textParams[j].nodeName,textParams[j].firstChild.nodeValue);

    }

  }

  //all stylesheets will have these properties available

  this.stylesheet.setParameter("modelId", this.model.id );

  this.stylesheet.setParameter("modelTitle", this.model.title );

  this.stylesheet.setParameter("widgetId", this.id );

  this.stylesheet.setParameter("skinDir", config.skinDir );

  this.stylesheet.setParameter("lang", config.lang );

  /** Xsl to convert GML Coordinates to Coords. */

  this.coordXsl=new XslProcessor(baseDir+"/widget/GmlCooordinates2Coord.xsl");

  /**

   * Set up XSL params and convert Gml Coordinate nodes to Gml Coords so

   * that they are easier to process by XSL.

   * @param objRef Pointer to this object.

   */

  this.prePaint = function(objRef) {

    objRef.model.setParam("modelStatus","preparing coordinates");

    objRef.stylesheet.setParameter("width", objRef.containerModel.getWindowWidth() );

    objRef.stylesheet.setParameter("height", objRef.containerModel.getWindowHeight() );

    bBox=objRef.containerModel.getBoundingBox();

    objRef.stylesheet.setParameter("bBoxMinX", bBox[0] );

    objRef.stylesheet.setParameter("bBoxMinY", bBox[1] );

    objRef.stylesheet.setParameter("bBoxMaxX", bBox[2] );

    objRef.stylesheet.setParameter("bBoxMaxY", bBox[3] );

    objRef.stylesheet.setParameter("color", "#FF0000" );

    objRef.resultDoc = objRef.coordXsl.transformNodeToObject(objRef.resultDoc);

    // Force refresh of the wz_jsgraphics handle when the widget's node

    // has been refreshed.

    if (!document.getElementById(objRef.outputNodeId)){

      //objRef.jg=null;

    }

  }

  /**

   * Called when the context's hidden attribute changes.

   * @param objRef This object.

   * @param layerName  The name of the layer that was toggled.

   */

  this.hiddenListener=function(objRef, layerName){

    var vis="visible";

    if(objRef.model.getHidden(layerName)) {

      vis="hidden";

    }

    var outputNode = document.getElementById(objRef.outputNodeId)

    for (var i=0; i< outputNode.childNodes.length; ++i) {

      outputNode.childNodes[i].style.visibility=vis;

    }

  }

  this.model.addListener("hidden",this.hiddenListener,this);

}