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WorkbenchLabelProvider [message #634076]

Wed, 20 October 2010 09:11

Eclipse User

Hi folks,

I'm currently doing my first steps in e4 application developement.
I associated the model part with my POJO class and everything
works quit well until now.
I want to use a JFace TreeViewer combined with a WorkbenchLabelProvider
that provides labels for adaptable objects.
The problem is that instanciating this LabelProvider fails with an
Exception:
....
Caused by: java.lang.IllegalStateException: Workbench has not been
created yet.
at org.eclipse.ui.PlatformUI.getWorkbench(PlatformUI.java:92)
at
org.eclipse.ui.model.WorkbenchLabelProvider.<init>(WorkbenchLabelProvider.java:76)

My code:

@PostConstruct
public void buildUI() {
....
viewer = new TreeViewer(parent, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL);
Platform.getAdapterManager().registerAdapters(adapterFactory ,MyNode.class);
viewer.setLabelProvider(new WorkbenchLabelProvider()); // fails
viewer.setContentProvider(new BaseWorkbenchContentProvider());
viewer.setInput(rootNode);
....
}

I will be happy about any suggestions, how to solve this issue the
e4-ish way. :-)

TIA,
Jens

Re: WorkbenchLabelProvider [message #634084 is a reply to message #634076]

Wed, 20 October 2010 09:34

Eclipse User

You can only use this stuff if you are running inside compat mode and
not in a native e4 application.

Tom

Am 20.10.10 15:11, schrieb Jens Piegsa:
> Hi folks,
>
> I'm currently doing my first steps in e4 application developement.
> I associated the model part with my POJO class and everything
> works quit well until now.
> I want to use a JFace TreeViewer combined with a WorkbenchLabelProvider
> that provides labels for adaptable objects.
> The problem is that instanciating this LabelProvider fails with an
> Exception:
> ...
> Caused by: java.lang.IllegalStateException: Workbench has not been
> created yet.
> at org.eclipse.ui.PlatformUI.getWorkbench(PlatformUI.java:92)
> at
> org.eclipse.ui.model.WorkbenchLabelProvider.<init>(WorkbenchLabelProvider.java:76)
>
>
> My code:
>
> @PostConstruct
> public void buildUI() {
> ...
> viewer = new TreeViewer(parent, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL);
> Platform.getAdapterManager().registerAdapters(adapterFactory ,MyNode.class);
> viewer.setLabelProvider(new WorkbenchLabelProvider()); // fails
> viewer.setContentProvider(new BaseWorkbenchContentProvider());
> viewer.setInput(rootNode);
> ...
> }
>
>
> I will be happy about any suggestions, how to solve this issue the
> e4-ish way. :-)
>
>
> TIA,
> Jens

Re: WorkbenchLabelProvider [message #634107 is a reply to message #634084]

Wed, 20 October 2010 10:18

Eclipse User

Hi Tom,

Thank you very much for your fast reply. Since I'm starting a new
project I would prefer to write a native e4 application rather than
using downward compatibility stuff.
Are there some rules of thumb which parts of the old RCP API should
be avoided?

To get the TreeViewer running do I have to use some kind of
adapter service? Is there a new LabelProvider that handles different
types of input objects?

Jens

Re: WorkbenchLabelProvider [message #634117 is a reply to message #634107]

Wed, 20 October 2010 10:26

Eclipse User

Am 20.10.10 16:18, schrieb Jens Piegsa:
> Hi Tom,
>
> Thank you very much for your fast reply. Since I'm starting a new
> project I would prefer to write a native e4 application rather than
> using downward compatibility stuff.
> Are there some rules of thumb which parts of the old RCP API should
> be avoided?

All - no dependencies on org.eclipse.ui and friends should be avoided.
You can safely use org.eclipse.core stuff though.

>
> To get the TreeViewer running do I have to use some kind of
> adapter service? Is there a new LabelProvider that handles different
> types of input objects?

Not yet. You'd have to write your own until such features are extracted
from org.eclipse.ui and made available on their own

Tom

Re: WorkbenchLabelProvider [message #634122 is a reply to message #634117]

Wed, 20 October 2010 10:57

Eclipse User

Tom,

I stumbled upon your tutorial with the MailDemo application.
I will study this now and come back with more questions later :-)

Jens

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