Just discovered you can set a Java system property `apple.awt.application.appearance=system` to get ...

# compose-desktop

[Alexander Maryanovsky]

Just discovered you can set a Java system property apple.awt.application.appearance=system to get system-theme (dark/light) window title on macOS:

[Alexander Maryanovsky]

There’s also

window.rootPane.putClientProperty("apple.awt.fullWindowContent", true)
window.rootPane.putClientProperty("apple.awt.transparentTitleBar", true)

to allow the app content to extend inside the title bar, but keeping the traffic light buttons.

[andylamax]

whats the linux and windows equivalent of that flag?

[Alexander Maryanovsky]

I don’t think there are any.

[Michael Olmsted]

@Alexander Maryanovsky are these kind of system properties documented anywhere on the Kotlin side of things? I assume that Apple has documentation, but a KMP resource would be helpful to find those properties

[Alexander Maryanovsky]

They’re JVM/Swing properties, not KMP.

[Alexander Maryanovsky]

We could, and probably should, mention them in the Compose for Desktop tutorial.

[Adam Brown]

Ya I would love some integrated support at some point in the future. For now I'm using this library, which works okay:
https://github.com/Dansoftowner/jSystemThemeDetector

[Adam Brown]

And I'm using that in conjunction with this to actually set the window theme to Light or Dark:
https://github.com/weisJ/darklaf

[Adam Brown]

val osThemeDetector = OsThemeDetector.getDetector()
	if (osThemeDetector.isDark) {
		LafManager.install(DarculaTheme())
	} else {
		LafManager.install(IntelliJTheme())
	}