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Scrolling / zooming programmatically [message #725212]

Wed, 14 September 2011 09:12

Andreas Graf

Messages: 211
Registered: July 2009

Senior Member

Hi,

I am setting the selection programmatically, which works fine. However, I want to make sure that all selected elements are visible. Is there a way to programmatically scroll / zoom the diagram in the editor?

Thanks,

Andreas

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Re: Scrolling / zooming programmatically [message #725214 is a reply to message #725212]

Wed, 14 September 2011 09:14

Jos Warmer

Messages: 114
Registered: October 2010

Senior Member

Andreas,

I have set the selection programmatically as well. In my case Graphiti automatically scrolls the diagram to make the selected element visible. I did this for a single selection only. Doesn't this work for you? If so, how do you program the selection?

Jos

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Re: Scrolling / zooming programmatically [message #725245 is a reply to message #725214]

Wed, 14 September 2011 11:10

Andreas Graf

Messages: 211
Registered: July 2009

Senior Member

Hi Jos,

here is my code:

 public void execute(ICustomContext context) {
    	
    	PictogramElement[] pes = context.getPictogramElements();
    	
    	if (pes != null && pes.length == 1) {

           PictogramElement pe = pes[0];
           if(pe instanceof Connection)
           {
        	   Anchor sa = ((Connection) pe).getStart();
        	   Anchor se = ((Connection) pe).getEnd();
        	  
        	   getFeatureProvider().getDiagramTypeProvider().getDiagramEditor().selectPictogramElements(new PictogramElement[] {
        			   sa.getParent(),
        			   se.getParent()
        	   });
           }
    	}
    }

(I am selecting the peers of a connection).

However, there is no scrolling in this case. (see attached screenshot).

If I reverse the order of pictogram elements, (se.getParent(), sa.getParent()) I see some scrolling. I guess it depends on primary / secondary selection?.

Regards,

Andreas

Attachment: 2011-09-14 13h06_35.png
(Size: 19.05KB, Downloaded 211 times)

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Re: Scrolling / zooming programmatically [message #725261 is a reply to message #725245]

Wed, 14 September 2011 11:37

Jos Warmer

Messages: 114
Registered: October 2010

Senior Member

Ok, I have done this in a very different way. The focus I did was through the selectionChanged(IWorkbenchPart part, ISelection selection) method in the DiagramEditor class. I have subclassed this and overridden the selectionChanged method to listen to changes from other parts. The main thing is that you need a ISelection with the businessObject to be selected inside (you can create your own StruturedSelection instance for this.
My usage is different in that the selection was done in another workbench part and went through the selectionChanged(...) method of the DiagramEditor class and I always have only one element selected.

Jos

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Re: Scrolling / zooming programmatically [message #725592 is a reply to message #725245]

Thu, 15 September 2011 09:54

Michael Wenz

Messages: 1931
Registered: July 2009
Location: Walldorf, Germany

Senior Member

Andreas,

the selection method only uses the first element in the given array, that's
what GEF allows there. So this explains the behavior you have noticed.

Michael

"Andreas Graf" schrieb im Newsbeitrag news:j4q1dq$45e$1@news.eclipse.org...

Hi Jos,

here is my code:

public void execute(ICustomContext context) {

PictogramElement[] pes = context.getPictogramElements();

if (pes != null && pes.length == 1) {

PictogramElement pe = pes[0];
if(pe instanceof Connection)
{
Anchor sa = ((Connection) pe).getStart();
Anchor se = ((Connection) pe).getEnd();

getFeatureProvider().getDiagramTypeProvider().getDiagramEditor().selectPictogramElements(new
PictogramElement[] {
sa.getParent(),
se.getParent()
});
}
}
}

(I am selecting the peers of a connection).

However, there is no scrolling in this case. (see attached screenshot).

If I reverse the order of pictogram elements, (se.getParent(),
sa.getParent()) I see some scrolling. I guess it depends on primary /
secondary selection?.

Regards,

Andreas

Report message to a moderator