Re: [eclipse-incubator-e4-dev] Modelled UI change notification - live mo

[Tom Schindl <tom.schindl@xxxxxxxxxxxxxxx>]

Hi,

One more thing on this whole topic the rest is going to the bug. The
critical things in are DOM are (if you compare it with an ordinary DOM).

a) Distinguish between:
- Moving of nodes (e.g. moving ViewPart A from Stack A to Stack B)
- Removing of node (e.g. remove ViewPart A from Stack A)

This is doable with EMF but this gives us a new headache because this
assumes that we have a containment-relationship (or if you are not a
EMF-guru a bidirectional parent-child-relationship between Stack and View!)

b) because of a) this means that sharing View Part A in between Stack A
Perspective A and Stack B from Perspective B we suddendly have links in
our model. There are multiple ways to solve this:
- The views are located at another place (e.g. directly under the
  workbench)
- We use links and insert Link/Proxy objects where we want share things
  (You see this in my extended model!) between views and when a
  perspective gets visible all proxy objects are exchanged to the real
  view-part and at the place they got removed a new proxy with the link
  to the real object

Tom


Eric Moffatt schrieb:
> 
> Tom, in one word "sweet!!' I'd been working on wiring up the listeners
> but I'm just not a databinding guru. I've just taken a look at how you
> are wiring up the controls/model and love it...this is a pattern we can
> make great use of.
> 
> I'm switching over to using it but I can'tfind SWT text observables for
> 'Items' (i.e. MenuItem, ToolbarItem, CTabItem). I'll make a quick patch
> that adds them (a quick look a 'observeText' shows that this is fairly
> trivial).
> 
> Nice one,
> Eric
> 
> 
> 
> *Mike Wilson/Ottawa/IBM@IBMCA*
> Sent by: eclipse-incubator-e4-dev-bounces@xxxxxxxxxxx
> 
> 09/24/2008 01:22 PM
> Please respond to
> E4 developer list <eclipse-incubator-e4-dev@xxxxxxxxxxx>
> 
> 
> 	
> To
> 	E4 developer list <eclipse-incubator-e4-dev@xxxxxxxxxxx>
> cc
> 	
> Subject
> 	Re: [eclipse-incubator-e4-dev] Modelled UI change notification -      
>  live        model
> 
> 
> 	
> 
> 
> 
> 
> 
>> From: Kevin McGuire/Ottawa/IBM@IBMCA
>>
>> 1) Do we agree this is the behaviour we want?
>>
> I'd certainly like to see this. In particular, when we have talked
> publically about how e4 would be more dynamic/responsive to develop for,
> this was the kind of thing we had in mind.
> 
>> 2) When do we we think we'd provide it?
>>
> I'd argue that it's worth thinking about it soon, since there are
> potentially interesting issues w.r.t. state management, SWT widget
> lifecycle, etc.
> 
>> 3) I think I can imagine with the current code base how we handle
>> on-the-fly creation and deletion, but what about modification?  
>> Right now the factories 'make', they don't 'modify existing'.
>>
> ... and if we end up with a "destroy and recreate" model, we need to do
> a better job of maintaining state than we currently do (e.g. it's not ok
> for the tree to be recreated with all the nodes collapsed, etc.)
> 
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