RFR: 8365637: Unmanaged nodes are not added to the Scene's dirty layout list

[John Hendrikx]

On Mon, 18 Aug 2025 21:15:21 GMT, Nir Lisker <nlisker at openjdk.org> wrote:

> Does `SubScene`'s root also count as a layout root?

After investigation, it seems that SubScene's are considered **scene roots**, so that would it a layout root as well.  This code in `Parent` (which monitors Scene/SubScene properties) convinces me that's the case:

        sceneRoot = (newSubScene != null && newSubScene.getRoot() == this) ||
                    (newScene != null && newScene.getRoot() == this);
        layoutRoot = !isManaged() || sceneRoot;

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PR Comment: https://git.openjdk.org/jfx/pull/1874#issuecomment-3198543404