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Question

XML node lists – Example of issues

Hi,

Firstly, sorry for the longer than usual post.

The following code snippets demonstrate where there appear to be issues in the current XML support in Ti Mobile.

This example will work. In this instance the element list is created directly from the document element.

//This should list all 13 nodes
var xhr = Titanium.Network.createHTTPClient();
xhr.onload = function()
{
    var data = [];
    var doc = this.responseXML.documentElement;
    var elements = doc.getElementsByTagName("node");
    for (var i=0;i<elements.length;i++) {
        var row = Ti.UI.createTableViewRow();
        row.title = elements.item(i).getAttribute("id");
        data[i]=row;
    } 
    var tableview = Titanium.UI.createTableView({
       data:data,
    });
    Titanium.UI.currentWindow.add(tableview);   
};
xhr.open('GET','http://localhost/~mark/xmltext.xml');
xhr.send();

This next example should display all node elements but will only display 3. The elements list this time is created from the variable nodes i.e. not directly from document element.

//This should list all 13 nodes
var xhr = Titanium.Network.createHTTPClient();
xhr.onload = function()
{
    var data = [];  
    var doc = this.responseXML.documentElement;
    var nodes = doc.getElementsByTagName("nodes");
    var elements = nodes.item(0).getElementsByTagName("node");
    for (var i=0;i<elements.length;i++) {
        var row = Ti.UI.createTableViewRow();
        row.title = elements.item(i).getAttribute("id");
        data[i]=row;
    } 
    var tableview = Titanium.UI.createTableView({
       data:data,
    });
    Titanium.UI.currentWindow.add(tableview);   
};
xhr.open('GET','http://localhost/~mark/xmltext.xml');
xhr.send();

Here's the XML file I have been using.

<?xml version="1.0" encoding="UTF-8"?>
<response>
        <nodes id="nodes">
            <node id="node 1">
                <node id="node 2">
                    <node id="node 3"/>
                </node>
                <node id="node 4">
                    <node id="node 5"/>
                </node>
                <node id="node 6">
                    <node id="node 7"/>
                </node>
            </node>
            <node id="node 8">
                <node id="node 9">
                    <node id="node 10"/>
                </node>
            </node>
            <node id="node 11">
                <node id="node 12">
                    <node id="node 13"/>
                </node>
            </node>
        </nodes>
</response>

Cheers
Mark

Answer 1

As per above your problem u want to get value of elements in table view row so i solve it out in this way..

var doc = this.responseXML.documentElement;
var elements = doc.getElementsByTagName("title");
var extras = doc.getElementsByTagName("feature");
for(i=0; i <elements.length; i++)
{
data[i]= {title:"" + elements.item(i).text};
}
After this you have to add the value in tableview as below

var tableViewOptions = {
data: data,
top:40,
style:Titanium.UI.iPhone.TableViewStyle.GROUPED,
//headerTitle:'TableView examples',
//footerTitle:"Wow. That was cool!",
backgroundColor:'transparent',
shadowColor:'#aaa',
shadowOffset:{x:5,y:5},
rowBackgroundColor:'white'
};

var row = Titanium.UI.createTableViewRow();

var tableview = Titanium.UI.createTableView(tableViewOptions);
tableview.addEventListener('click', function(e)
{
    if (e.rowData.test)
        {
            var win = Titanium.UI.createWindow({
            url:e.rowData.test,
            title:e.rowData.title
        });
    Titanium.UI.currentTab.open(win,{animated:true});
        }
});
Ti.UI.currentWindow.add(tableview);

};

Try it .. if u have again problem then do comment.

Answer 2

good find. will open an issue for this.

Answer 3

Hi Jeff,
Thanks for opening it as an issue.
Following on from my above examples, the issues I have found so far seem to all stem from the fact that creating any node list or querying of nodes is fine when they are taken directly from the documentElement, but fail when they are not.
I reported this issue a week or so ago: http://developer.appcelerator.com/question/91/getelementsbytagname-issue.
And this a few days back: http://developer.appcelerator.com/question/3451/xml-dom-childnodes-issue
It seems to me that there is perhaps a single issue with the XML support that then manifests itself in all of the examples I can provide. That is that the common theme is they are all using or creating node lists that are not created directly from documentElement.
I had started to create a number of examples based on the same code examples above that try to populate a tableview, here's a few more I have found that you should be able to also confirm. Using the nextSibling property also seems to fail (see my other post for a nodewalker code example).
Please also check the log for the [TiDOMElementProxy kind]: unrecognized selector sent to instance exception that some of my examples will throw.

    var doc = this.responseXML.documentElement;
    var nodes = doc.getElementsByTagName("nodes");
    var elements = nodes.item(0).childNodes;

and

    var doc = this.responseXML.documentElement;
    var elements = doc.firstChild.childNodes; //expect response.nodes.node(*3) in my xml file

and

    var data = [];
    var doc = this.responseXML.documentElement;

    var row = Ti.UI.createTableViewRow();
    row.title = doc.firstChild.getAttribute("id") + " should be 'nodes'";
    data[0]=row;

    var row = Ti.UI.createTableViewRow();
    row.title = doc.firstChild.firstChild.getAttribute("id") + " should be 'node 1'";
    data[1]=row;

    var row = Ti.UI.createTableViewRow();
    row.title = doc.firstChild.firstChild.firstChild.getAttribute("id") + " should be 'node 2'";
    data[2]=row;

I hope these further examples help to narrow down the root of the problem ;)
Regards
Mark

Answer 4

these issues have been resolved and will be in tomorrow's 1.1 release.

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XML node lists – Example of issues

4 Answers