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Programatically evaluating expressions [message #326548]

Mon, 24 March 2008 22:43

Eclipse User

Originally posted by: bvkiran.yahoo.com

I have a custom toolbar within my editor where I want to leverage
core.expressions. I have a expression definition defined and I would like
to evaluate this given a editor context. Much similar to how menus and
toolbars work. Is there a way I can achieve this?

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Re: Programatically evaluating expressions [message #326619 is a reply to message #326548]

Wed, 26 March 2008 14:59

Paul Webster

Messages: 6859
Registered: July 2009
Location: Ottawa

Senior Member

You can use IMenuService to populate your custom toolbar (just give it a
special location uri like "toolbar:my.view.id.special.toolbar") and then
you can use org.eclipse.ui.menus contributions just like the normal
toolbars, and they will honour core expression.

THe other alternative in 3.4 is to use the IEvaluationService (which
takes a core expression and informs an IPropertyChangeListener of any
changes). The IEvaluationService is internal in 3.3 but API in 3.4

PW

--
Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions
http://wiki.eclipse.org/Menus_Extension_Mapping
http://help.eclipse.org/help33/index.jsp?topic=/org.eclipse. platform.doc.isv/guide/workbench.htm

Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions

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