| Implemented by the object returned by
org.zkoss.zk.ui.sys.ComponentCtrl.getExtraCtrl if a component requires the z.chchg command,
when any of its children and descendants are changed.
Once a component implements this interface and
ChildChangedAware.isChildChangedAware returns true, the z.chchg command is sent to the client
to update the visual representation. For example, a grid uses two tables
to implement header and body, and then it has to re-align the header
once any of its descendants is changed.
author: tomyeh |