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Absolute coordinates to container relative coordinates [message #909847]

Fri, 07 September 2012 18:56

Eclipse User

I am insisting in this question once in bugzilla (where I filed an enhancement https://bugs.eclipse.org/bugs/show_bug.cgi?id=389031), Michael answer suggests me that this is possible.

So given diagrameditor mouse coordinates how can I calculate the respective container relative coordinates at the moment of canMove/move invokation?

I've been watching to :
DiagramEditor#getMouseLocation
DiagramEditor#calculateRealMouseLocation(nativeLocation)
IPeLayoutService()#getLocationRelativeToDiagram()

But, or by my incompetence or something else I'm not figurering out how to do this.
Any hint??

Thanks in advance

Re: Absolute coordinates to container relative coordinates [message #910695 is a reply to message #909847]

Mon, 10 September 2012 04:23

Eclipse User

Let's see:
1) diagramEditor.getMouseLocation() returns the mouse position relative to
the root of the current viewport
2) applying diagramEditor.calculateRealMouseLocation(...) on that location
from 1) returns the mouse location relative to the root of the diagram
3) context.getTargetContainer().getGraphicsAlgorithm().getX()/getY() returns
the location of the of the target container relative to the diagram root
4) substracting 3) from 2) should be what you are looking for.

Let me know if I'm wrong...

Michael

Re: Absolute coordinates to container relative coordinates [message #910755 is a reply to message #910695]

Mon, 10 September 2012 06:40

Eclipse User

Hi. Thanks.

I adapted to my situation (multiple nested container shapes), summing up the successive (x,y) of each container until Diagram, and it is working.

Thanks again.

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