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Ability to get visible size of diagram? [message #876086]

Wed, 23 May 2012 18:01

Brian Fitzpatrick
Messages: 495
Registered: July 2009

Senior Member

Hi all...

I have to say that though Graphiti was a little rough to get going with at first, once I got over the first hump we've been making great progress on our editor.

We've had a request however that I'm not quite sure how to handle. Is there a way to get the visible size of the editor as opposed to the full size of the diagram?

For instance, if the editor's "view port" on the diagram is only 300x400 and the full diagram is 1024x768, is there a way to determine how much is visible?

I've been poking about in previous forum posts, the docs, and the APIs but haven't seen a way to do this yet.

Any ideas?

Thanks in advance and thanks for the great framework!
--Fitz

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Re: Ability to get visible size of diagram? [message #876307 is a reply to message #876086]

Thu, 24 May 2012 06:50

Michael Wenz
Messages: 1292
Registered: July 2009
Location: Walldorf, Germany

Senior Member

Hm, there's no Graphiti API for that, but you may retrieve the information
directly from the GEF graphical viewer in the editor.

Michael

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Re: Ability to get visible size of diagram? [message #876475 is a reply to message #876307]

Thu, 24 May 2012 13:27

Brian Fitzpatrick
Messages: 495
Registered: July 2009

Senior Member

Do you by chance have an example?

I was able to figure this out:

GraphicalViewer gv = SwitchyardSCAEditor.getActiveEditor().getGraphicalViewer();
org.eclipse.graphiti.ui.internal.editor.GFFigureCanvas canvas = (org.eclipse.graphiti.ui.internal.editor.GFFigureCanvas) gv.getControl();
int viewwidth = canvas.getViewport().getClientArea().width;
int viewheight = canvas.getViewport().getClientArea().height;

But unfortunately the GraphicalViewer doesn't seem to be instantiated by the time I need the dimensions to resize the shape I want to resize...

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Re: Ability to get visible size of diagram? [message #876701 is a reply to message #876475]

Fri, 25 May 2012 02:24

Erdal Karaca
Messages: 629
Registered: July 2009

Senior Member

Another [quick and dirty] workaround (which should work, I think) would be to remember the parent Composite provided in createPartControl of the editor and ask for its size, i.e. the editor would be responsible for obtaining the "viewport" size...

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