RFR: 8092379: GridPane should not render extra gaps when entire rows or columns are unmanaged [v4]

[John Hendrikx]

On Mon, 1 Dec 2025 22:34:34 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

> huge pain, yes, that's why I am still working on https://github.com/andy-goryachev/FxDock/blob/master/doc/CPane.md

:-)

I created my own `Flex` layout, which is a combination of HBox + VBox + GridPane.  It basically works by looking at how they are nested.  If you nest multiple horizontal flexes into a vertical flex:

     FlexV
           FlexH [ label , text field ]
           FlexH [ label , text field ]

The above would produce an unaligned mess when the labels are different lengths, just like nesting HBoxes into VBox would.  However, the Flex has a property "aligned" that you can set, and it will affect the layout of any nested flexes of the opposite type.  In this case, if you give the top FlexV this property, the nested horizontal flexes will automatically align as if they were in a grid.

It looks like this in code (in builder form):

        Panes.vflex("form").aligned().nodes(
          Panes.hflex().nodes(
            "Width",
            FX.spinner().editable().value(parameters.width)
          ),
          XPanes.hflex().nodes(
            "Height",
            FX.spinner().editable().value(parameters.height)
          )
        );

I actually only use `GridPane` in my samples, as I'm not ready yet to publish `Flex`.

-------------

PR Comment: https://git.openjdk.org/jfx/pull/1990#issuecomment-3599330984