Introduces Widget.LoadingDelegate, to allow a widget owner to act when
a widget is added to or removed from the document without subclassing
it. E.g. to attach to an event bus, or fire RPC requests.

Review at http://gwt-code-reviews.appspot.com/866801


git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@8770 8db76d5a-ed1c-0410-87a9-c151d255dfc7
5 files changed