[news.eclipse.platform] Re: [Databinding] Problem with AggregateValidati

[Matthew Hall <matthall@xxxxxxxxxxxxxxxxx>]

Are you doing anything with the value of the AggregateValidationStatus? 
in the change listener?  AVS is backed by a ComputedValue which fires an 
event once and doesn't fire any more until you look at the new value. 
It's kind of like Schroedinger's cat--you don't get any more change 
events until you look in the safe.  See 
ObservableTracker.getterCalled(IObservable).  Then see IObservableValue 
and look for methods tagged @TrackedGetter.

We do this to avoid an event storm if several observables are changed 
rapidly.  I think it will fix your problem just to call getValue() on 
the AVS inside the change listener.

Matthew

Kai Schlamp wrote:
> Comments below.
>
> > My guess is that because you are using MAX_SEVERITY you might not be 
> > editing the field that has the current max severity, (i.e. you are 
> > editing a field with a lower severity validation status.
>
> It doesn't work whatever text field I edit. handleChange is called once 
> and after that not anymore.
> And even when using MERGED I get the same behavior.
> What do I have to do that handleChange method is called everytime the 
> text field is modified?
>
>
> > > That leads me to my next question? I want to listen to whenever a 
> > > validate method of the above added validator's was called. I need it 
> > > to setPageComplete of a WizardPage (as all text fields together have 
> > > an influence on that).
> >
> > Have you tried WizardPageSupport.create(DataBindingContext, WizardPage)?
>
> Sounds ok, but it does also some things I don't like (updates the error 
> message). Also there are several other cases I need the 
> AggregateValidationStatus to work.
> Any suggestions?
>
> By the way I am using Eclipse 3.5M5.
>
> Kai