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Set selection programmatically [message #667239]

Wed, 27 April 2011 11:10

Eclipse User

Hello,

How do I programmatically set the selection of a Graphiti-based editor? (Scenario: The user double-clicks on an entry in the Problems view, that entry contains information about the business object and I would like to select the diagram element(s) that correspond to this BO.) I would have expected the editor to map between business objects or pictogram elements and the low-level GEF element, but that might have been a bit naive since all I'm getting is a CCE:

java.lang.ClassCastException: org.eclipse.graphiti.mm.pictograms.impl.ContainerShapeImpl cannot be cast to org.eclipse.gef.EditPart
 at org.eclipse.gef.SelectionManager.setSelection(SelectionManager.java:253)
 at org.eclipse.gef.ui.parts.AbstractEditPartViewer.setSelection(AbstractEditPartViewer.java:751)
 at org.eclipse.graphiti.ui.internal.editor.GraphitiScrollingGraphicalViewer.setSelection(GraphitiScrollingGraphicalViewer.java:62)
  ...

Thanks
Volker

Re: Set selection programmatically [message #667331 is a reply to message #667239]

Thu, 28 April 2011 03:36

Eclipse User

Volker,

you can call the method selectPictogramElements in the DiagramEditor, that
will do it. Before you might have to get the pictogram element for your BO
using the LinkService.

HTH,
Michael

"Volker Wegert" wrote in message news:ip9b5j$ofb$1@news.eclipse.org...

Hello,

How do I programmatically set the selection of a Graphiti-based editor?
(Scenario: The user double-clicks on an entry in the Problems view, that
entry contains information about the business object and I would like to
select the diagram element(s) that correspond to this BO.) I would have
expected the editor to map between business objects or pictogram elements
and the low-level GEF element, but that might have been a bit naive since
all I'm getting is a CCE:

java.lang.ClassCastException:
org.eclipse.graphiti.mm.pictograms.impl.ContainerShapeImpl cannot be cast to
org.eclipse.gef.EditPart
at org.eclipse.gef.SelectionManager.setSelection(SelectionManag er.java:253)
at
org.eclipse.gef.ui.parts.AbstractEditPartViewer.setSelection (AbstractEditPartViewer.java:751)
at
org.eclipse.graphiti.ui.internal.editor.GraphitiScrollingGra phicalViewer.setSelection(GraphitiScrollingGraphicalViewer.j ava:62)
...

Thanks
Volker

Re: Set selection programmatically [message #667372 is a reply to message #667331]

Thu, 28 April 2011 08:10

Eclipse User

Michael,

thanks for the information.

Michael Wenz wrote on Thu, 28 April 2011 03:36

you can call the method selectPictogramElements in the DiagramEditor, that will do it. Before you might have to get the pictogram element for your BO using the LinkService.

First of all, I get a warning when doing this:
Discouraged access: The type DiagramEditorInternal is not accessible due to restriction on required project org.eclipse.graphiti.ui

And this feels strange - I've got a framework that is supposed to handle the entire business object vs. graphical representation thingy, and I still have to fiddle with this outside of the editor. I think that the editor should be able to do this mapping by itself - or does that collide with some design principle I overlooked?

Volker

Re: Set selection programmatically [message #667378 is a reply to message #667372]

Thu, 28 April 2011 08:16

Eclipse User

Right, the editor API is something we still need to clean up. See
https://bugs.eclipse.org/bugs/show_bug.cgi?id=336488

Michael

"Volker Wegert" wrote in message news:ipbl15$87h$1@news.eclipse.org...

Michael,

thanks for the information.

Michael Wenz wrote on Thu, 28 April 2011 03:36
> you can call the method selectPictogramElements in the DiagramEditor, that
> will do it. Before you might have to get the pictogram element for your BO
> using the LinkService.

First of all, I get a warning when doing this:
Discouraged access: The type DiagramEditorInternal is not accessible due to
restriction on required project org.eclipse.graphiti.ui

And this feels strange - I've got a framework that is supposed to handle the
entire business object vs. graphical representation thingy, and I still have
to fiddle with this outside of the editor. I think that the editor should be
able to do this mapping by itself - or does that collide with some design
principle I overlooked?

Volker

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