I need to detect touch events and change some state with respect to up and down motion events. The n...

# compose

[Denis]

I need to detect touch events and change some state with respect to up and down motion events. The next code (see the thread) works well with simple taps, but if I tap with 3 fingers, it adds only "Down" event, but no "Up". What could be the problem? Do I need to use something else besides pointerInteropFilter?

[Denis]

var log by remember { mutableStateOf(listOf<String>()) }
Surface(
    color = MaterialTheme.colors.background,
    modifier = Modifier.fillMaxSize().pointerInteropFilter {
        when (it.action) {
            MotionEvent.ACTION_DOWN -> log = log + "Down"
            MotionEvent.ACTION_UP -> log = log + "Up"
            MotionEvent.ACTION_MOVE -> log = log + "Move"
            else -> false
        }
        true
    }
) { Column { for (l in log.takeLast(20)) Text(l) } }

[Denis]

Kotlin 1.4.21, Compose 1.0.0-alpha09.