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How to use Drag&Drop Feature? [message #651491]

Mon, 31 January 2011 06:56

Eclipse User

Hi,

I'd like to add the possibility to Drag & Drop Elements from a standard
TreeViewer to a Diagram. I.e. I drag a BuisnessObject from the
TreeViewer to set an Attribute in another BusinessObject represented by
a PictogramElement in my Diagram.
I can create such a behaviour by adding a DropTargetListener to the
DiagramEditor and creating a Command in this Listener. But I have the
impression that this is not the way intended by the graphiti framework.
Is the DragAndDropFeature ment to be used in this case?
If so, how do I call a DragAndDropFeature in this case?

Re: How to use Drag&Drop Feature? [message #651507 is a reply to message #651491]

Mon, 31 January 2011 08:01

Eclipse User

What abaout using an AddFeature for that purpose? The feature would in this
case not really add something but simply change the attruibute of the other
BO.

Michael

"Veit Hoffmann" wrote in message news:ii67m8$ehd$1@news.eclipse.org...

Hi,

I'd like to add the possibility to Drag & Drop Elements from a standard
TreeViewer to a Diagram. I.e. I drag a BuisnessObject from the
TreeViewer to set an Attribute in another BusinessObject represented by
a PictogramElement in my Diagram.
I can create such a behaviour by adding a DropTargetListener to the
DiagramEditor and creating a Command in this Listener. But I have the
impression that this is not the way intended by the graphiti framework.
Is the DragAndDropFeature ment to be used in this case?
If so, how do I call a DragAndDropFeature in this case?

Re: How to use Drag&Drop Feature? [message #651686 is a reply to message #651507]

Tue, 01 February 2011 04:51

Eclipse User

Hi Michael,
that did the trick. Thank you very much. I couldn't use the
ObjectsTransferDropTargetListener because I used the wrong Type of
Transfer. After I changed this in the DragListener of my View everything
works fine.

Cheers

Veit

besides... Great Framework

Am 31.01.2011 14:01, schrieb Michael Wenz:
> What abaout using an AddFeature for that purpose? The feature would in
> this case not really add something but simply change the attruibute of
> the other BO.
>
> Michael
>
>
> "Veit Hoffmann" wrote in message news:ii67m8$ehd$1@news.eclipse.org...
>
> Hi,
>
> I'd like to add the possibility to Drag & Drop Elements from a standard
> TreeViewer to a Diagram. I.e. I drag a BuisnessObject from the
> TreeViewer to set an Attribute in another BusinessObject represented by
> a PictogramElement in my Diagram.
> I can create such a behaviour by adding a DropTargetListener to the
> DiagramEditor and creating a Command in this Listener. But I have the
> impression that this is not the way intended by the graphiti framework.
> Is the DragAndDropFeature ment to be used in this case?
> If so, how do I call a DragAndDropFeature in this case?

Re: How to use Drag&Drop Feature? [message #759158 is a reply to message #651686]

Sat, 26 November 2011 23:53

Eclipse User

Sorry to revive that old post, but it seems that others succeeded where I'm failing right now:
I also tried to implement a View with a TreeViewer and setup a DragSourceListener.

That TreeViewer is diplaying nodes that are instances of IAdapter (that can be adpated to IResource/IFile or java.io.File)

But my DragSourceListener setDragData never gets called when I drop on the Graphiti editor, although I have set an AddFeature that accepts IResource/IFile or File...
Actually my FeatureProvider getAddFeature() is never called.

The same drop from standard Project Explorer or Navigator is working fine.

So what I suppose is that I have set the wrong Transfer type, but then what should it be?
I tried ResourceTransfer, FileTransfer, LocalSelectionTransfer, alone or combined, without success...

Can anyone tell me what I'm doing wrong?

Thanks in advance,
-Patrick

Re: How to use Drag&Drop Feature? [message #759762 is a reply to message #759158]

Tue, 29 November 2011 16:06

Eclipse User

OK so (for anyone interested), in my case using LocalSelectionTransfer finally worked but I needed to have an AddFeature that would accept IAdaptable and not IResource...

I thought the dragSetData (where I convert the selection to a IResource[] using the IAdaptable interface) would be called for that but in fact dragSetData was not called because the test on the Transfer type is done beforehand.

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