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Strange behaviour of EContentAdapter [message #716943]

Thu, 18 August 2011 17:07

Georg G.
Messages: 4
Registered: August 2011

Junior Member

Hello,

I have a weird problem concerning the registration of adapters.
I do as follows:
In a GEF EditPart I add:

private final EContentAdapter adapter = new EContentAdapter() {
		public void notifyChanged(Notification notification) {
		System.out.println("Notfication received from the data model. Data model has changed!!!");
		}
	};

then I add the two methods to register the adapter which it actually does (I debugged it):

        /** {@inheritDoc} */
	@Override
	public void activate() {
		super.activate();
		signal.eAdapters().add(adapter);
	}

	/** {@inheritDoc} */
	@Override
	public void deactivate() {
		super.activate();
		signal.eAdapters().remove(adapter);
	}

In a properties view I then edit the model via binding:

bindingContext.bindValue(
				WidgetProperties.text(SWT.Modify).observe(control),
				EMFProperties.value(feature).observe(observable));

The model is indeed changed because if I close the editor with the editPart and reopen it the values have changed. BUT the notifyChange method is never invoked. WHY????

Any help is appreciated!

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Re: Strange behaviour of EContentAdapter [message #716983 is a reply to message #716943]

Thu, 18 August 2011 19:42

Ed Merks
Messages: 24564
Registered: July 2009

Senior Member

Georg,

Comments below.

On 18/08/2011 2:07 PM, Georg G. wrote:
> Hello,
>
> I have a weird problem concerning the registration of adapters.
> I do as follows:
> In a GEF EditPart I add:
> private final EContentAdapter adapter = new EContentAdapter() {
> public void notifyChanged(Notification notification) {
> System.out.println("Notfication received from the data model.
> Data model has changed!!!");
You're not calling super and that's really important for the content
adapter to adapt to changes made to the content.
> }
> };
>
> then I add the two methods to register the adapter which it actually
> does (I debugged it):
>
> /** {@inheritDoc} */
> @Override
> public void activate() {
> super.activate();
> signal.eAdapters().add(adapter);
> }
>
> /** {@inheritDoc} */
> @Override
> public void deactivate() {
> super.activate();
> signal.eAdapters().remove(adapter);
> }
>
> In a properties view I then edit the model via binding:
> bindingContext.bindValue(
> WidgetProperties.text(SWT.Modify).observe(control),
> EMFProperties.value(feature).observe(observable));
> The model is indeed changed because if I close the editor with the
> editPart and reopen it the values have changed. BUT the notifyChange
> method is never invoked. WHY????
Is signal the root container of all objects involved?
>
> Any help is appreciated!

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