Hey folks, I believe I just found a bug involving a `Box` with `scale` set to 0f and content with an...

# compose

[Chris Grigg]

Hey folks, I believe I just found a bug involving a Box with scale set to 0f and content with an onClick handler. When scale is 0f, the content’s onClick handler will be applied to the whole window. Reproducible code coming below, replying to myself.

[Chris Grigg]

@Composable
private fun ShrinkAnimationContent(
    fade: Boolean,
    modifier: Modifier,
    progress: Float,
    content: @Composable () -> Unit,
) {
    Box(
        modifier = modifier
            .wrapContentSize()
            .scale(progress)
//            .scale(if (progress == 0f) 0.0001f else progress)
            .alpha(
                when {
                    fade -> progress
                    else -> 1f
                }
            )
    ) {
        content()
    }
}

@Preview
@Composable
private fun ShrinkAnimationContentBrokenPreview() {
    val (count, setCount) = remember { mutableStateOf(0) }

    Column(modifier = Modifier.fillMaxSize(), horizontalAlignment = Alignment.CenterHorizontally, verticalArrangement = Arrangement.Center) {
        ShrinkAnimationContent(fade = false, modifier = Modifier, progress = 0f) {
            Button(onClick = { setCount(count.inc()) }) {
                Text("Click Me")
            }
        }
        Spacer(modifier = Modifier.requiredHeight(24.dp))
        Text("The count is $count")
    }
}

[Zach Klippenstein (he/him) [MOD]]

Did you file a bug? Tracker is linked in the channel topic

[Chris Grigg]

Try running that. You’ll find that you can tap anywhere on the screen and it will behave like you clicked the button. Then comment the scale(progress) and uncomment the line below it and you’ll see that it works as expected.

[Chris Grigg]

Haven’t filed yet, I literally just found it and it feels so crazy so I wanted to share in case someone could point out something I’m overlooking.

[Chris Grigg]

Issue filed https://issuetracker.google.com/issues/183126231