How to determine stage decoration insets before showing stage?

[Tobias Oelgarte]

I have the problem that a Stage needs to be positioned precisely, while keeping the native window decorations. This should be a trivial task, but I can't find a way to determine the decoration thickness (window insets) prior to showing the stage.

How can this be done with JavaFx?

I can determine the decoration insets and position the stage _after_ calling Stage.show(), but this leads to artifacts caused by canceled window animations (jumping window). In Swing I can simply use JFrame.getInsets() to get the decoration thickness, compute the preferred size of the content and position the frame correctly before showing it. PS: I looked up various 'solutions', but all came down to either use own decorations, showing the stage first or to assume a fixed decoration thickness.

smime.p7s
Description: S/MIME Cryptographic Signature