Why keyboard action will invoke twice but i only trigger once?

When i test keyboard simple example, i find a problem that the action will invoke twice but i only trigger once.

My code is simple and from: https://github.com/JetBrains/compose-jb/blob/master/tutorials/Keyboard/README.md

fun main() = Window {
    MaterialTheme {
        var text by remember { mutableStateOf("") }
        Column(Modifier.fillMaxSize(), Arrangement.spacedBy(5.dp)) {
            TextField(
                value = text,
                onValueChange = { text = it },
                modifier = Modifier.onPreviewKeyEvent {
                    when {
                        (it.isCtrlPressed && it.key == Key.Minus) -> {
                            println("on enter")
                            true
                        }
                        else -> false
                    }
                }
            )
        }
    }
}

here is the recording, you can see the “on enter” print twice when i trigger once

[ryanmitchener]

@akurasov I have added a PR for updating the keyboard tutorial here: https://github.com/JetBrains/compose-jb/pull/1877

[RubiTree]

@RubiTree I believe you are getting the KeyDown and KeyUp events. Add a check for keydown or keyup depending on when you want the event to trigger.

when {
    (it.type == KeyEventType.KeyDown && it.isCtrlPressed && it.key == Key.Minus) -> {
        println("on enter")
        true
    }
    else -> false
}

thank your for giving solution, really works ! But i wonder why not add the condition “it.type == KeyEventType.KeyDown” to sample?