New Plug-in item doesn't work as cascading lov

I have just finished creating a new plug-in that is a searchable select list. I want the LOVs to be cascading. In other words if I have another item on the page I want to be able to specify in my plugin item that the parent LOV is that item. How do I make it work with the cascading LOVs. I am guessing that I have to add some code to my render function but I have no clue what and there are no examples of how to do this. I did find the following in the api documentation but I am not sure how to use it or whether it is what I am looking for
apex.widget.initPageItem
Here is a link to an example of my new plugin. There are 2 items on the page. Z is set to have X as its cascading LOV parent but it doesn't work and would like to know how to make it work. You can also download my plug-in from this page and try it yourself.
http://apex.oracle.com/pls/apex/f?p=32395:3

Hi,
the "apex.widget.initPageItem" will not help you in your case, it's used to register callbacks for $s, $v, show, hide, ... if you have a more advanced item type. You can have a look at the "Star Rating" plug-in which implements several of these callbacks.
For adding cascading LOV support, please have a look at our own select list implementation in /i/javascript/uncompressed/apex_widget_4_0.js
Search for
apex.widget.selectList = function(pSelector, pOptions) {to get a blue print implementation for all the steps you have to add to your widget to add cascading LOV support.
If you need further help, please let me know.
Regards
Patrick
My Blog: http://www.inside-oracle-apex.com
APEX 4.0 Plug-Ins: http://apex.oracle.com/plugins
Twitter: http://www.twitter.com/patrickwolf

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My Blog: http://www.inside-oracle-apex.com
APEX 4.0 Plug-Ins: http://apex.oracle.com/plugins
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