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Changing model for a TableViewer in a View [message #333490]

Mon, 15 December 2008 10:52

Eclipse User

Originally posted by: sean.mitchwood.com

Hi All..

I'm working on an RCP app that has a view which lists items in a
TableViewer.

The view is backed by a model which is provided as a service by OSGi
declarative services, and so typically it may or may not available.

My problem is that when the model turns up in my ServiceTracker, and I
call setInput(model) and then refresh() on the TableViewer, my View does
not refresh itself.

In the ContentProvider I can see that inputChanged() is being called,
but not getElements().

I'm not sure if I've approached this the right way, but it's certainly
not working as I expected.

Anyone have any insight on this problem?

Cheers,

Sean

Re: Changing model for a TableViewer in a View [message #333507 is a reply to message #333490]

Tue, 16 December 2008 06:15

Eclipse User

did you call the setInput(model) and refresh on the SWT Event thread
using Display.asyncExec? Maybe this could solve the problem...

On Mon, 15 Dec 2008 10:52:32 -0500, Sean Mitchell <sean@mitchwood.com>
wrote:

>Hi All..
>
>I'm working on an RCP app that has a view which lists items in a
>TableViewer.
>
>The view is backed by a model which is provided as a service by OSGi
>declarative services, and so typically it may or may not available.
>
>My problem is that when the model turns up in my ServiceTracker, and I
>call setInput(model) and then refresh() on the TableViewer, my View does
>not refresh itself.
>
>In the ContentProvider I can see that inputChanged() is being called,
>but not getElements().
>
>I'm not sure if I've approached this the right way, but it's certainly
>not working as I expected.
>
>Anyone have any insight on this problem?
>
>Cheers,
>
>Sean

Re: Changing model for a TableViewer in a View [message #333524 is a reply to message #333507]

Tue, 16 December 2008 09:20

Eclipse User

Originally posted by: sean.mitchwood.com

Francois Fernandes wrote:

> did you call the setInput(model) and refresh on the SWT Event thread
> using Display.asyncExec? Maybe this could solve the problem...

Thanks, I did, still no luck, although it did get me past the thread
access exception I didn't realise I was having. I hate how all these
exceptions are quietly hidden away... is there any way in the PDE to
make exceptions a little more noticeable?

Cheers,

Sean

Re: Changing model for a TableViewer in a View [message #333526 is a reply to message #333524]

Tue, 16 December 2008 09:31

Eclipse User

Yes run with -consoleLog and you'll see them all.

Tom

Sean Mitchell schrieb:
> Francois Fernandes wrote:
>
>> did you call the setInput(model) and refresh on the SWT Event thread
>> using Display.asyncExec? Maybe this could solve the problem...
>
> Thanks, I did, still no luck, although it did get me past the thread
> access exception I didn't realise I was having. I hate how all these
> exceptions are quietly hidden away... is there any way in the PDE to
> make exceptions a little more noticeable?
>
> Cheers,
>
> Sean

--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------

Re: Changing model for a TableViewer in a View [message #333535 is a reply to message #333526]

Tue, 16 December 2008 22:37

Eclipse User

Originally posted by: automatic.javalobby.org

Store the input object in Vector or ArrayList. Then set the vector/arraylist as input. Check for the instanceof of the input element in getElements method as in the following code. Make sure that the methods in label provider also checks for instanceof input element.

public Object[] getElements(Object inputElement) {
   ArrayList<Object> objList = new ArrayList<Object>();
   if (inputElement instanceof Vector) {
      objList.addAll((Vector) inputElement);
   }
   return objList.toArray();
}

~Prasanna

Re: Changing model for a TableViewer in a View [message #333537 is a reply to message #333526]

Tue, 16 December 2008 22:39

Eclipse User

Originally posted by: automatic.javalobby.org

Hi,

Store the input object in Vector or ArrayList. Then set the vector/arraylist as input. Check for the instanceof of the input element in getElements method as in the following code.

public Object[] getElements(Object inputElement) {
   ArrayList<Object> objList = new ArrayList<Object>();
   if (inputElement instanceof Vector) {
      objList.addAll((Vector) inputElement);
   }
   return objList.toArray();
}

Make sure that the methods in label provider also checks for instanceof of the input element.

~Prasanna

Re: Changing model for a TableViewer in a View [message #333539 is a reply to message #333526]

Tue, 16 December 2008 22:40

Eclipse User

public Object[] getElements(Object inputElement) {
   ArrayList<Object> objList = new ArrayList<Object>();
   if (inputElement instanceof Vector) {
      objList.addAll((Vector) inputElement);
   }
   return objList.toArray();
}

Make sure that the methods in label provider also checks for instanceof of the input element.

~Prasanna

Re: Changing model for a TableViewer in a View [message #333540 is a reply to message #333524]

Tue, 16 December 2008 22:41

Eclipse User

public Object[] getElements(Object inputElement) {
   ArrayList<Object> objList = new ArrayList<Object>();
   if (inputElement instanceof Vector) {
      objList.addAll((Vector) inputElement);
   }
   return objList.toArray();
}

Make sure that the methods in label provider class also checks for instanceof of the input element before retrieveing the data.

~Prasanna

Re: Changing model for a TableViewer in a View [message #333546 is a reply to message #333540]

Wed, 17 December 2008 00:31

Eclipse User

Originally posted by: automatic.javalobby.org

Hi,

I am sorry for the repeated replies. I noticed that the server threw exception on replies, hence I tried posting the messages repeatedly.

Thanks for understanding.

~Prasanna

Re: Changing model for a TableViewer in a View [message #333582 is a reply to message #333546]

Wed, 17 December 2008 16:31

Eclipse User

Originally posted by: sean.mitchwood.com

Prasanna wrote:

> I am sorry for the repeated replies. I noticed that the server threw exception on replies, hence I tried posting the messages repeatedly.

Yeah man, no problem.

Thanks to all of you on this thread for your help... between your
various bits of advice I have it working now.

Arawak

Re: Changing model for a TableViewer in a View [message #333640 is a reply to message #333490]

Fri, 19 December 2008 07:15

Eclipse User

Could you please provide some sample code on how you invoke the
methods in question?

On Mon, 15 Dec 2008 10:52:32 -0500, Sean Mitchell <sean@mitchwood.com>
wrote:

>Hi All..
>
>I'm working on an RCP app that has a view which lists items in a
>TableViewer.
>
>The view is backed by a model which is provided as a service by OSGi
>declarative services, and so typically it may or may not available.
>
>My problem is that when the model turns up in my ServiceTracker, and I
>call setInput(model) and then refresh() on the TableViewer, my View does
>not refresh itself.
>
>In the ContentProvider I can see that inputChanged() is being called,
>but not getElements().
>
>I'm not sure if I've approached this the right way, but it's certainly
>not working as I expected.
>
>Anyone have any insight on this problem?
>
>Cheers,
>
>Sean

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