Prevent ContentPresentor while scaled to resize all objects in it's content

Hey guys, I have a ContentPresenter which contains Image inside of开发者_如何学运维 it and a few Ellipses (points). There's a Zoom behavior on the ContentPresenter and it scales all the objects inside of it. Does anyone have an idea how to stop the scaling of the Ellipses?

Thanks

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I don't thin it would be possible to do it automatically, you probably need to find some strategy to "unscale" the ellipses. I did something similar, but about line thickness, on this sample: http://www.felicepollano.com/2011/03/21/ACADFriendlyWPFZoomBehavior.aspx and I think you can grab the idea.