I’m trying to get the custom type loading for grids to work, but I don’t seem to manage 
Keep getting the message: Error: ‘this.obj.firstChild’ is null or not an object
this happens after the custom rowloader has been invoked. When debugging, the row.childNodes.length seems to be 0.
on the support page of the custom loading (dhtmlx.com/docs/products/dhtmlxG … types.html), the codesample gives a 404.
dhtmlx.com/docs/products/dhtmlxG … sample.zip
code for calling the grid initialize:
var g= l.cells("c").attachGrid();
defineCustomLoader(g);
g.parse("<structures><structure><id>text</id><versionId>text</versionId><createdBy>String</createdBy></structure></structures>", "custom_xml");the custom loader function:
function defineCustomLoader(grid){
// the central loader
grid._process_custom_xml=function(xml){
this._parsing=true;
if (!xml.doXPath){
var t = new dtmlXMLLoaderObject(function(){});
if (typeof xml == "string")
t.loadXMLString(xml);
else {
if (xml.responseXML)
t.xmlDoc=xml;
else
t.xmlDoc={};
t.xmlDoc.responseXML=xml;
}
xml=t;
}
var rows = xml.doXPath("//structure"); // get all row elements from XML
for (var i = 0; i < rows.length; i++){
var id = this.getUID(); // XML doesn't have native ids, so custom ones will be generated
this.rowsBuffer[i]={ // store references to each row element
idd: id,
data: rows[i],
_parser: this._process_custom_xml_row, // cell parser method
_locator: this._get_custom_xml_data // data locator method
};
this.rowsAr[id]=rows[i]; // store id reference
}
this.render_dataset(); // force update of grid's view after data loading
this._parsing=false;
}
// the row parser
grid._process_custom_xml_row=function(r, xml){
alert('custom rowloader invoked..');
var size = this.xmlLoader.doXPath("./versionId", xml)[0]; // get size sub-tag
alert(size.data);
var mode = this.xmlLoader.doXPath("./createdBy", xml)[0]; // get mode sub-tag
var strAr = [
size.firstChild.data,
mode.firstChild.data
];
// we don't need any custom attributes, so set just a plain array
r._attrs={};
for (j=0; j < r.childNodes.length; j++) r.childNodes[j]._attrs={};
//finish data loading
this._fillRow(r, strAr);
return r;
}
grid._get_custom_xml_data=function(r, xml){
alert("data function invoked..");
}
}thx,
-Joost