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Over riding an existing action [message #144173]

Wed, 25 July 2007 15:58

Eclipse User

Originally posted by: james.willans.xactium.com

I want to extend the condition by which a DeleteFromModelAction calculates
it enablement. What is the best way of doing this?

The method I have tried is to create a new Action which extends
DeleteFromModelAction with a new enablement calculation. I created an
extension of new DiagramContributionItemProvider which overrides
createAction to create the extension to DeleteFromModelAction rather than
the original. This was then declared as the contributionItemProvider in
the plugin.xml of the diagram plugin. However this does not seem to force
the diagram to use the new DiagramContributionItemProvider rather than the
original?

Thanks,

James

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Re: Over riding an existing action [message #144311 is a reply to message #144173]

Wed, 25 July 2007 20:53

Cherie Revells

Messages: 299
Registered: July 2009

Senior Member

James,

If you think there is a bug with the
DeleteFromModelAction.calculateEnabled() you could add to
https://bugs.eclipse.org/bugs/show_bug.cgi?id=165370.

To fix this, you will have to remove this DeleteFromModelAction and
contribute your own that does exactly what you want. However, I thought
the generated code was already doing this? Search for the following in
your XML:
<popupPredefinedItem id="deleteFromModelAction" remove="true"/>

- Cherie

James Willans wrote:
> I want to extend the condition by which a DeleteFromModelAction
> calculates it enablement. What is the best way of doing this?
> The method I have tried is to create a new Action which extends
> DeleteFromModelAction with a new enablement calculation. I created an
> extension of new DiagramContributionItemProvider which overrides
> createAction to create the extension to DeleteFromModelAction rather
> than the original. This was then declared as the
> contributionItemProvider in the plugin.xml of the diagram plugin.
> However this does not seem to force the diagram to use the new
> DiagramContributionItemProvider rather than the original?
>
> Thanks,
>
> James
>

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