onItemClick: Ext.emptyFn,
onItemDblClick: Ext.emptyFn,
onItemContextMenu: Ext.emptyFn,
onItemKeyDown: Ext.emptyFn,
onBeforeItemMouseDown: Ext.emptyFn,
onBeforeItemMouseUp: Ext.emptyFn,
onItemClick: Ext.emptyFn,
onItemDblClick: Ext.emptyFn,
onItemContextMenu: Ext.emptyFn,
onItemKeyDown: Ext.emptyFn,
onBeforeItemMouseDown: Ext.emptyFn,
onBeforeItemMouseUp: Ext.emptyFn,