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

[Matthew Hall <matthall@xxxxxxxxxxxxxxxxx>]

hao wrote:
> The addListenerTo() of the label provider does get called if I set the 
> label provider's constructor input as 
> contentprovider.getKnownElements(). Could you please briefly describe 
> what the addListenerTo() of the listeninglabelprovider does.

The content provider adds and remove elements from the known elements 
set as they are added to and removed from the viewer.  addListenerTo() 
is called for every element as it is first added to the viewer, and 
removeListenerFrom() is called for every element as the last instance of 
it is removed from the viewer.

The idea is that you should add a listener to the element, and fire a 
LabelProviderChangedEvent whenever elements change and should be updated 
in the viewer.

Matthew