[news.eclipse.platform] How to enable/disable a menu with the new org.ec

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[news.eclipse.platform] How to enable/disable a menu with the new org.eclipse.ui.menus extension point?

From: Stefan Lötscher <stefan.loetscher@xxxxxxxxxxxxx>
Date: Tue, 17 Apr 2007 22:20:21 +0200
Newsgroups: eclipse.platform
Organization: EclipseCorner
User-agent: Microsoft-Entourage/10.1.6.040913.0

I like to enable/disable a menu defined with the new org.eclipse.ui.menus
extension point. There is only a 'visibleWhen' entry in the schema but no
enablementWhen entry.

The IHandler interface has a isEnabled method but without any execution
context as parameter. What do I have to do in order change the enablement
state depending on the actual selection for example.

Thanks 
- Stephan Lötscher

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