Sencha Touch 2.0 has a search filed in list of examples headed as "Search List".
I want to implement exactly the same thing in Ext JS4 - search filed on a tree panel.
The search filed I can see only highlights the matched searches but I want to filter out the tree panel with only matched strings present in the view, as soon as I type a character.

But I cannot find any search field as per my requirements in Ext JS4 API or examples.

Help appreciated.