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EMF databinding - Observing multiple structural features on Eobject [message #421911]

Mon, 18 August 2008 09:39

Maurice O'Connor

Messages: 86
Registered: July 2009

Member

Hi there,

I have an EObject containing two structural features, which contain
objects of the same type. I would like to observe these two ELists in my
TableViewer via jface EMF databinding.

Is EMFObservables.observeMap the way to to this? I'm about to pursue this
now, so just want to verify that it should actually work, instead of
hammering away at a bad solution!

Something like:

observeMap(myObject, [features to observe])

Your advice would be much appreciated, thanks!

Maurice

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Re: EMF databinding - Observing multiple structural features on Eobject [message #421913 is a reply to message #421911]

Mon, 18 August 2008 10:01

Thomas Schindl

Messages: 6651
Registered: July 2009

Senior Member

Maybe ComputedList could be the solution to this problem though I've
never used it for this kind of thing though so this might not work.

Can you try something like this:

-------8<-------
ComputedList l = new ComputedList() {
IObservableList l1 = /* EMFObservables.....*/null;
IObservableList l2 = /* EMFObservables.....*/null;

@Override
protected java.util.List calculate() {
ArrayList<Object> l = new ArrayList<Object>();
l.addAll(l1);
l.addAll(l2);
return l;
}
};

viewer.setInput(l);
-------8<-------

Tom

Maurice O'Connor schrieb:
> Hi there,
>
> I have an EObject containing two structural features, which contain
> objects of the same type. I would like to observe these two ELists in my
> TableViewer via jface EMF databinding.
>
> Is EMFObservables.observeMap the way to to this? I'm about to pursue
> this now, so just want to verify that it should actually work, instead
> of hammering away at a bad solution!
>
> Something like:
>
> observeMap(myObject, [features to observe])
>
> Your advice would be much appreciated, thanks!
>
> Maurice
>
>
>
>
>

--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------

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Re: EMF databinding - Observing multiple structural features on Eobject [message #421915 is a reply to message #421913]

Mon, 18 August 2008 10:30

Maurice O'Connor

Messages: 86
Registered: July 2009

Member

Tom Schindl wrote:

> Maybe ComputedList could be the solution to this problem though I've
> never used it for this kind of thing though so this might not work.

Thanks a mil, this solution worked a treat!

Maurice

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