Re: [e4-dev] Declarative UI in E4

[Hallvard Trætteberg <hal@xxxxxxxxxxx>]

Boris Bokowski wrote:
>  > I will also contribute Javascript support for EMF, which should make
>  > it easy to
>  > script UI objects. I've extended it with dependency tracking, to support
>  > re-evaluating expressions when their value changes. This should
>  > support databinding.
>
> Sounds cool - have you seen the recent discussion about "contexts"? 
> There is early code in CVS 
> (org.eclipse.e4.core.services.internal.context.EclipseContext in 
> org.eclipse.e4.core.services) which also does dependency tracking. It 
> would be interesting to explore the similarities and differences between 
> what you have done, and the code in e4. Perhaps we can extract some 
> common code?

I saw the discussion, but didn't relate it to Javascript. I think Ed mentioned 
once that there is a feature request for EMF in bugzilla for supporting 
dependency management. E.g. you traverse some structure or evaluate some 
expression, and then get a notification when any part of that structure changes, 
so you can re-travers or -evaluate, to get the new result.

Javascript uses wrappers that makes it easy to record all kinds of things, 
including all (explicit) read access to EMF features.

Hallvard