The event handler method receives the following arguments:
sender
A ListContainer instance, which is the source of the event. This object will be passed to the handler function as the first argument.
args
A NotifyCollectionChangingEventArgs instance, which contains event data. This object will be passed to the handler function as the second argument.

The following code creates a ListView, which derives from ListContainer and handles its selectionChanging event:

JavaScript  Copy Code
var listView = new ui.ListView(document.getElementById("listView")); listView.selectionChanging.addEventListener(listSelectionChanging); function listSelectionChanging(sender, args) {  if (args.oldItems.contains(item1))  {    args.cancel = true;   }  }

ListContainer Members
ListContainer Class
MindFusion.Common.UI Namespace