graphstream/gs-ui — pull request #4 by FlexiGit (2014-06-17 13:19:35+00:00)
Title: Fixed Exception when viewport size is exactly equal to padding.

This should fix issue #100.

The problem here is, that when the viewport size is exactly equal to the overall padding sx and/or sy are computed to zero and the resulting AffineTransform in the Backend will become uninvertable.