[news.eclipse.platform] Re: Does jface databinding support treeviewer?

[Matthew Hall <matthall@xxxxxxxxxxxxxxxxx>]

hao wrote:
> If the viewer's elements got into content provider's ObservableSet, how 
> does the personPhoneKnownElements & personPhoneGroupKnownElements 
> ObservableSet of label provider got to be populated?

They are populated in response to a SetChangeEvent on the known elements 
set.  See ListeningLabelProvider constructor: it adds an 
ISetChangeListener that calls addListenerTo() when an element is added, 
and calls removeListenerFrom() when an element is removed.

We receive these messages in PersonGroupLabelProvider's addListenerTo() 
and removeListenerFrom() methods, and manually add them to / remove them 
from either personPhoneKnownElements or personPhonGroupKnownElements, 
depending on type.

Matthew