[Ubuntu 20.04] WindowEvents.onMaximize is never called

[arkivanov]

If I pass WindowEvents.onMaximize to the main Window, it is never called.

    Window(
        title = "Example",
        events = WindowEvents(
            onMaximize = { println("onMaximize") },
        )
    ) {
        // Some content here
    }

I tried to minimize/maximize/restore the window, no output in the console.

Also maybe unrelated, but KDoc says about WindowEvents.onRestore the following:

@param onRestore The event that is invoked when the window is restored after the window has been maximized or minimized.

Currently on my machine it is called only when the window's state is changed from minimized to normal. It is not called when the window is de-maximized. So it seems, either the KDoc is incorrect or there is a bug.

[acousticksan]

Have you tried the new Windows API?

fun main() = application {
    val windowState = rememberWindowState()
     Window(
        onCloseRequest = ::exitApplication,
        state = windowState,
    ) {
            LaunchedEffect(windowState){
                snapshotFlow { windowState.placement }
                  .onEach {
                      if (it == WindowPlacement.Maximized){
                          println("onMaximize")
                      }
                  }
                .launchIn(this)
        }
    }
}    

[arkivanov]

Checked the new API, it works fine

[arkivanov]

However I could not find any replacement for onFocusGet and onFocusLost events.

[igordmn]

However I could not find any replacement for onFocusGet and onFocusLost events.

Unfortunately, we haven't implemented it for the new API yet (but we plan to). As a temporary workaround, you can use Swing interop:

import androidx.compose.runtime.DisposableEffect
import androidx.compose.ui.window.singleWindowApplication
import java.awt.event.FocusEvent
import java.awt.event.FocusListener

fun main() = singleWindowApplication {
    DisposableEffect(Unit) {
        window.addWindowFocusListener(object : WindowFocusListener {
            override fun windowGainedFocus(e: WindowEvent) {
            }

            override fun windowLostFocus(e: WindowEvent) {
            }
        })
        onDispose {}
    }
}

[igordmn]

Let's move requestFocus/isFocused to another issue