Hi,
http://jsfiddle.net/33rX6/
As can be seen in the example in the "homework" effect one is presented "animCollapse".
http://docs.sencha.com/extjs/4.2.5/#!/api/Ext.tree.Panel-cfg-animCollapse But I do not know why the TreeView version of 99.95.1300 UniGUI there is no such effect or a property to activate it. I've tried manually add the "ClientEvents" (affterrender, beforeRender, beforeinit and aftercreate), most did not work. How and what would be the correct place to put this effect? It apparently seems to be the default ExtJS but UniGUI not have.