[news.eclipse.platform] Re: enabledWhen for handlers and editors

[Paul Webster <pwebster@xxxxxxxxxx>]

Karl Koster wrote:
> This is the contents of the expression definitions extension point:
>
> There are property testers for the properties org.kdr.isNew, 
> org.kdr.isDirty, and org.kdr.isAllowed.

An expression containing the segment below will be re-evaluated when the 
variable changes ... so when a new active editor is selected.
         <with
               variable="activeEditor">
            <test
                  property="org.kdr.isDirty"
                  value="true">
            </test>
         </with>

This will not get re-evaluated if the current active editor simply goes 
dirty.  You would have to use 
org.eclipse.ui.services.IEvaluationService.requestEvaluation(String) at 
the appropriate time to request a re-evaluation of expressions 
containing your property.

PW


--
Paul Webster
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