[News.eclipse.technology.gmf] Re: How can I understand that new element

[Trifonov <ttrifonov@xxxxxxxx>]

Hi, Christian and Mostafa,
thank you for your help. I noticed there are two methods in EditPart 
that listen for changes in model
- protected void handleNotificationEvent(Notification event)
- public void notifyChanged(Notification notification)

What is the difference between them?

Regards,
Trifonov

mmostafa@xxxxxxxxxx wrote:
> Hi ;
>         Your Edit Part is already listening to the Semantic/View 
> elements it uses and it receive the events when a child is added to the 
> Notation View, or the semantic element
> adding a child usually is handled by the container edit part
> you can always override the method handleNotificationEvent(Notification 
> event) in your edit part and add any special handling to it
> for example, you can check if the notifier is the semantic element and 
> the Feature is some special feature and the event type is Add or delete 
> then you trigger what ever action you like
> you can check the GraphicalEditPart#handleNotificationEvent 
> implementation to see how we respond to adding/removing children to the 
> view by triggering a refreshChildren call
> if you like to listen to more than the View/Semantic element of the edit 
> part you can override the GraphircalEditPart #addNotationalListeners or 
> GraphicalEditPart#addSemanticListeners and listen to other elements, but 
> you had to be careful when you make your edit part listen to elements 
> other than its Semantic/View because this might affect you application 
> performance if it was not done right
>
> I hope this will help