How to add scripts in treeview based widget?

Hi,

We are developing a new plug-in for Adobe Indesign CC. Most of the code we used for this plug-in from sdk samples BasicSelectableDialog's code.We have already implemented this code based on ListBox view,but now we are trying to implement this code for Treeview.

Based on treeview we implemented the left panel., when we clicked either one of the option in left side,it will navigate to another one. For example , in the above dialog, if we clicked the EventsAndScripts option, it shows like this. In the right side panel(Drag Drop Event Scripts) we want to add our scripts in treeview. .please help us if anyone have idea regarding this..

thanks in advance..