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Get active workbench part in Command IHandler [message #318875]

Wed, 08 August 2007 08:54

Eclipse User

Hello,

I wanna get access to the currently active workbench part when my
command handler is called. I can see that somewhere in
ExecutionEvent.applicationContext it is hidden in a HashMap. But how do
I access this value in a API conform way? Is there any documentation
about the Workbench's applicationContext available?

Thanks in advance,
Phil

Re: Get active workbench part in Command IHandler [message #318950 is a reply to message #318875]

Thu, 09 August 2007 09:08

Eclipse User

Philipp Kursawe wrote:
> Hello,
>
> I wanna get access to the currently active workbench part when my
> command handler is called. I can see that somewhere in
> ExecutionEvent.applicationContext it is hidden in a HashMap. But how do
> I access this value in a API conform way? Is there any documentation
> about the Workbench's applicationContext available?

In 3.3 you can use HandlerUtil to extract information from the execution
event, the methods are named and typed, and there is usually a form that
throws an exception and a form that just returns null.

In 3.2 most of the same information is there, but you need to extract it
manually. With some checks:
IWorkbenchPart activePart = null;
if (event.getApplicationContext() instanceof IEvaluationContext) {
IEvaluationContext app = (IEvaluationContext) event
.getApplicationContext();
Object obj = app.getVariable(ISources.ACTIVE_PART_NAME);
if (obj instanceof IWorkbenchPart) {
activePart = (IWorkbenchPart) obj;
}
}

http://wiki.eclipse.org/Command_Core_Expressions has an explanation of
the variables available through ISources.

Later,
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

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