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Home » Eclipse Projects » Eclipse 4 » Switch Perspective on startup in E4 application(After displaying a login window, I want to switch perspectives according to user choice. Accessing the workbench to do so results in an OSGI exception.)

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Switch Perspective on startup in E4 application [message #1128137]

Mon, 07 October 2013 11:34

Stefanie Hasler

Messages: 3
Registered: October 2013

Junior Member

Hi all!

My RCP application is supposed to display a login window and then display the correct perspective for the specific user who logged in.

Is there any way to do this in E4? I get as far as the login window; the communication to the server is working, the user is identified. But whenever I want to switch to the correct perspective, I get a nullpointer exception upon accessing the workbench ("workbench has not been started yet").

I assume the workbench bundle really has not been loaded yet. What is the correct way to do this?

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Re: Switch Perspective on startup in E4 application [message #1128235 is a reply to message #1128137]

Mon, 07 October 2013 13:32

Jonas Helming

Messages: 699
Registered: July 2009

Senior Member

When do you trigger the switch of the perspective and where?
A lifecyle handler might be the right thing for you:
http://eclipsesource.com/blogs/tutorials/eclipse-4-e4-tutorial-part-6-behavior-annotations/

Am 07.10.2013 14:01, schrieb Stefanie Hasler:
> Hi all!
>
> My RCP application is supposed to display a login window and then
> display the correct perspective for the specific user who logged in.
> Is there any way to do this in E4? I get as far as the login window; the
> communication to the server is working, the user is identified. But
> whenever I want to switch to the correct perspective, I get a
> nullpointer exception upon accessing the workbench ("workbench has not
> been started yet").
>
>
> I assume the workbench bundle really has not been loaded yet. What is
> the correct way to do this?
>
>

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Re: Switch Perspective on startup in E4 application [message #1129013 is a reply to message #1128235]

Tue, 08 October 2013 07:55

Stefanie Hasler

Messages: 3
Registered: October 2013

Junior Member

Thank you for your reply.

I tried it both

- using a lifecycle handler (in the @PostContextCreate method
- using an Addon

In both instances, I can open the login window (but only my login window shows, the main application certainly has not been started yet). However, the workbench is not accessible at those points.

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Re: Switch Perspective on startup in E4 application [message #1129053 is a reply to message #1129013]

Tue, 08 October 2013 08:37

Eclipse User

You should listen for the APP_STARTUP_COMPLETE event. I think the workbench is available at that moment. https://bugs.eclipse.org/bugs/show_bug.cgi?id=376821

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Re: Switch Perspective on startup in E4 application [message #1129082 is a reply to message #1129053]

Tue, 08 October 2013 09:14

Stefanie Hasler

Messages: 3
Registered: October 2013

Junior Member

Thank you, that was it.

I registered an addon listening for the APP_STARTUP_COMPLETE event and it's working in there.

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Re: Switch Perspective on startup in E4 application [message #1256846 is a reply to message #1129082]

Tue, 25 February 2014 21:41

Nate Lew

Messages: 1
Registered: July 2009

Junior Member

What method are you using to switch the perspective from the APP_STARTUP_COMPLETE listener? I am getting into the listener fine after my login screen completes however I can't find a way to actually get the perspective to switch.

I have handler already registered that switches the perspective however i cant seem to access the handler from this class.

@Execute
public void execute(MApplication app, EPartService partService,
EModelService modelService) {
MPerspective element =
(MPerspective) modelService.find("cmd.id", app);
// Now switch perspective
if(element!=null){
partService.switchPerspective(element);
}

thanks for the help.

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