macOS: Rounded popup windows

[ctipper]

I run a cross-platform app that uses Flatlaf for macOS, Windows and Linux. On macOS I am using FlatMacLightLaf and FlatMacDarkLaf on other platforms I am using FlatLightLaf and FlatDarkLaf with theme switching. PR #643 introduced rounded popup windows but only for FlatLightLaf etc. I'd like this made the default in FlatMacLightLaf etc. This would align with the rounded menus and selection highlights in the macOS themes.

In my code the following sets the properties but there is no effect when using FlatMacLightLaf etc.

/**
 * @see <a href="https://github.com/JFormDesigner/FlatLaf/pull/643">Windows 11: Rounded popup windows #643</a>
 */
UIManager.put("PopupMenu.borderCornerRadius", 8);
UIManager.put("ComboBox.borderCornerRadius", 8);
UIManager.put("ToolTip.borderCornerRadius", 8);
UIManager.put("Popup.borderCornerRadius", 8);

[ctipper]

I know it looks like an error, but I can say that these properties have long been ignored and I don't think the macos theme has ever had rounded combo boxes and tooltips in my dev environment. Now on Apple Silicon maOS 13.5.1 , but previously Intel macOS 12.6

[ctipper]

No rounded drop downs on Linux either, Debian 12 JDK 17

[DevCharly]

PR #643 works only on Windows 11. See title and description of this PR.
Not sure why you expect that this also works on macOS or Linux 😕

Java/Swing does not support native rounded borders out-of-the-box.
PR #643 uses a native library (DLL) to modify the Win32 window, that Java created, to enable rounded border.

To do similar on macOS, a new native library for macOS is required that does modify the macOS windows.
I already know that this is possible and roughly how to do this, but implementing and testing this is time consuming.
I expect at least 3-4 days to make this work.

If you're working for a company, please ask you boss whether the company is willing to sponsor FlatLaf to finance development of this feature. Estimated cost: 2000 EUR/USD. https://www.formdev.com/flatlaf/sponsor/
I could work on it in September and release it in FlatLaf 3.3.

Sorry to ask for sponsorship, but can't implement all the features companies want for free...

[ctipper]

Don't worry I realised after inspecting repo that this was an unimplemented feature I saw the pull request #643 had some properties and jumped the gun. My app is not commercial, if you have any other requests I'm happy to let it take its' course, this issue was created under a misunderstanding of the state of the project. Do you mind if I close the issue?

[DevCharly]

Let's keep the issue open. Maybe some company passes by and is willing to sponsor development of this feature.

[DevCharly]

See PR #772