On Tue, 17 Jun 2025 00:41:54 GMT, Michael Strauß <mstra...@openjdk.org> wrote:
>> The window button states (disabled/hidden) of extended stages with a >> `HeaderButtonOverlay` or custom header buttons are inconsistent with what we >> would expect from the OS (Windows and Linux). To figure out what we would >> expect, I started with gathering some data. The following table shows the >> button states of system-decorated windows on various platforms: >> >> #### Windows 11 >> >> | Window attributes | Iconify | Maximize | Close | >> |---|---|---|---| >> | resizable, not modal | visible | visible | visible | >> | not resizable, not modal | visible | visible, disabled | visible | >> | resizable, modal | visible, disabled | visible | visible | >> | not resizable, modal | hidden | hidden | visible, utility-style | >> >> #### Ubuntu 24 / Fedora 41 (GNOME) >> >> | Window attributes | Iconify | Maximize | Close | >> |---|---|---|---| >> | resizable, not modal | visible | visible | visible | >> | not resizable, not modal | visible | hidden | visible | >> | resizable, modal | visible, _not working_ | visible, _not working_ | >> visible | >> | not resizable, modal | visible, _not working_ | hidden | visible | >> >> #### Kubuntu 24 (KDE) >> >> | Window attributes | Iconify | Maximize | Close | >> |---|---|---|---| >> | resizable, not modal | visible | visible | visible | >> | not resizable, not modal | visible | hidden | visible | >> | resizable, modal | visible, _not working_ | visible | visible | >> | not resizable, modal | visible, _not working_ | hidden | visible | >> >> ## Observations >> >> 1. On Windows, buttons are generally disabled when their operation is not >> possible with the given window attributes. >> * Exception: modal/non-resizable windows look like utility windows >> (iconify and maximize are hidden) >> 2. On GNOME and KDE, buttons are generally hidden when their operation is >> not possible. >> * Exception: iconify and maximize on modal windows is not hidden, but >> seems to simply not do anything (bug?) >> >> ## Permitted window button operations >> >> Given the gathered observations and some simple logic, this is the table of >> operations that are permitted for all combinations of modal and resizable >> window attributes: >> >> | Window attributes | Iconify | Maximize | Close | >> |---|---|---|---| >> | resizable, not modal | yes | yes | yes | >> | not resizable, not modal | yes | no | yes | >> | resizable, modal | no | yes | yes | >> | not resizable, modal | no | no | yes | >> >> ## Fixes >> >> This PR includes the following changes: >> 1. Unused code relating to window modality is removed... > > Michael Strauß has updated the pull request incrementally with one additional > commit since the last revision: > > small refactor JavaFX modal windows are not native modals, as evidenced by the code removal on this PR (it's not used) . On GNOME, native modal windows automatically remove the minimize and maximize buttons.  I did an experiment and found that it's possible to get native modal windows (at least with GTK Glass) by passing the modality flag from `WindowStage` to `createWindow`. I haven’t done extensive testing, but it seems to work - likely because the modality can’t be changed afterward. ------------- PR Comment: https://git.openjdk.org/jfx/pull/1831#issuecomment-2986109841
