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How to connect everything together (binding and syncronisation?) [message #493764]

Tue, 27 October 2009 17:56

Eclipse User

I have a perspective with three components: a view with a treeviewer of objects, an editor (which edits the objects in the treeviewer) and a properties view which edits the selected item in the treeviewer.

I'm a bit confused on how to syncronise the objects between these views. For example, say the name of the object is changed using the properties view, how do I get the treeviewer to update (either by refresh or otherwise). If the editor part's name is the objects name and it gets changed by the properties view, how do I update the editor part name automatically?

Can somebody point me in the right direction? Basically, I'm struggling to understand how to connect all of the different components together!

Cheers

Re: How to connect everything together (binding and syncronisation?) [message #493938 is a reply to message #493764]

Wed, 28 October 2009 10:49

Eclipse User

Hey,

all you need is a common model and the Eclipse databinding. You could do it also without Databinding, but i would prefer it because it handels a lot of things for you.

Your model could be a Singleton so it is accesible from all Views. Another Approach would be to access the model via a service.

No matter which kind of model access you do, you can then bind your objects contained by the models, to your treeviewer, properties view, and editor.

Google for eclipse + databinding to find out how it works, if you have questions, just ask.

Greetz
Willi

Re: How to connect everything together (binding and syncronisation?) [message #494619 is a reply to message #493764]

Sun, 01 November 2009 04:12

Eclipse User

Okay, I'm getting to there with my understanding, hopefully you can help me a little bit further.

I have a common data model (a singleton instance) which returns a List's of domain object (just POJO).

I bind this list to a TreeViewer using an ObservableListTreeContentProvider (IObservableFactory and TreeStructureAdvisor). My next question is, how do I get the treeviewer to update when an item is added to the list in the model? Or, when an item in the list changes?

Re: How to connect everything together (binding and syncronisation?) [message #494676 is a reply to message #494619]

Mon, 02 November 2009 02:44

Eclipse User

Hi Epoch,

too bad that i dont have much experience with TreeViewer and Databinding because this technique is quite new.

Nevertheless for my TableViewer i use WritableList objects in my Model. If you add or remove some object to a WritableList, the Tableviewer will be updated automatically. So try that, i think it should work.

Greetz
Thomas

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