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Activate Menu Item depending on logged-in user [message #106668]

Mon, 29 September 2008 04:49

Eclipse User

Hi,

Following is the requirement:

A menu item in a context menu should be visible/enabled only when the
logged-in user belongs to a certain user-group (having elevated
privileges).

Currently, i am able to use the org.eclipse.ui.menus extension to display
the menu and enable/disable it based on the perspective using the
<activeWhen> tag (which was another requirement).

Any pointers on how the menu item can be enabled/disabled based on the
logged-in user? Basically, how can an object completely unrelated to the
UI be used to activate/deactivate a menu item? It would be preferable if
the bulk of this requirement could be implemented using plugin.xml, as
opposed to only programming in java.

TIA,
Best Regards,
-abhi

Re: Activate Menu Item depending on logged-in user [message #106682 is a reply to message #106668]

Mon, 29 September 2008 04:54

Eclipse User

Hi,

the expression framework of Eclipse allows you to provide your own
property tester with the "org.eclipse.core.expressions.propertyTesters"
extension point.

Depending in your user/group authentication you should be able to query
your own propertyTester within a <visibleWhen> and <test> expression.

Greets
Benny

abhi wrote:
> Hi,
>
> Following is the requirement:
>
> A menu item in a context menu should be visible/enabled only when the
> logged-in user belongs to a certain user-group (having elevated
> privileges).
> Currently, i am able to use the org.eclipse.ui.menus extension to
> display the menu and enable/disable it based on the perspective using
> the <activeWhen> tag (which was another requirement).
> Any pointers on how the menu item can be enabled/disabled based on the
> logged-in user? Basically, how can an object completely unrelated to the
> UI be used to activate/deactivate a menu item? It would be preferable if
> the bulk of this requirement could be implemented using plugin.xml, as
> opposed to only programming in java.
>
> TIA,
> Best Regards,
> -abhi
>
>

Re: Activate Menu Item depending on logged-in user [message #106755 is a reply to message #106682]

Mon, 29 September 2008 07:28

Eclipse User

Hi,

Thanks a lot for the info.

I happened to stumble across org.eclipse.ui.activities extension, one of
whose purposes seems to be exactly making such UI contributions
visible/invisible through expression based activities. The Eclipse help
section
( http://help.eclipse.org/ganymede/topic/org.eclipse.platform. doc.isv/guide/workbench_advext_activities.htm)
provides documentation for the same.

Thanks again for the input!

Best Regards,
-abhi

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