如何在jetpack compose中显示具有适当大小/布局的垂直文本

Question

如何正确旋转jetpack compose中的文本并使其进行正确的布局？ 当我在文本 object 上使用rotate修饰符时，文本被旋转，但布局中占用的大小似乎使用了预旋转的文本宽度。

这是我想要完成的一个简单示例 - 垂直文本应该在狭窄空间的左侧：

@Composable
fun MainBox() {
    Column(
        modifier = Modifier.fillMaxSize(),
        horizontalAlignment = Alignment.CenterHorizontally
    ) {
        Text(
            modifier = Modifier.padding(4.dp).background(Color.Gray),
            text = "This is at the top"
        )

        Row(
            modifier = Modifier.fillMaxWidth().weight(1f),
            verticalAlignment = Alignment.CenterVertically
        ) {

            Text(
                modifier = Modifier.padding(4.dp).rotate(-90f),
                text = "This should be vertical text on the left side"
            )

            Text(
                modifier = Modifier.fillMaxSize().background(Color.Yellow),
                textAlign = TextAlign.Center,
                text = "This is a big yellow box that should take up most of the space"
            )
        }
    }
}

然而，这表明了这一点。

如果我缩短竖排文本中的文本，它只占用一个狭窄的空间，看起来更像我想要的布局。

有没有办法拦截布局过程或其他一些设置来固定大小，以便垂直文本只占用一个文本行的水平空间宽度，但仍然适应用户字体大小的变化（所以没有固定大小）？

此处和此处的类似问题的答案不能解决此问题或不再有效。

Answer 1

我的版本。 经过几次测试，它似乎工作得很好

class ComposeActivity7 : ComponentActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContent {
            ComposeTutorialTheme {

                Column(
                    modifier = Modifier.fillMaxSize(),
                    horizontalAlignment = Alignment.CenterHorizontally
                ) {
                    Text(
                        modifier = Modifier
                            .padding(4.dp)
                            .background(Color.Gray),
                        text = "This is at the top"
                    )

                    Row(
                        modifier = Modifier
                            .fillMaxWidth()
                            .weight(1f),
                        verticalAlignment = Alignment.CenterVertically
                    ) {
                        Text(
                            modifier = Modifier
                                .vertical()
                                .rotate(-90f)
                                .background(Color.Gray)
                                .padding(4.dp),
                            text = "This should be vertical text on the left side"
                        )
                        Text(
                            modifier = Modifier
                                .fillMaxSize()
                                .background(Color.Yellow),
                            textAlign = TextAlign.Center,
                            text = "This is a big yellow box that should take up most of the space"
                        )
                    }
                }
            }
        }
    }
}

fun Modifier.vertical() =
    layout { measurable, constraints ->
        val placeable = measurable.measure(constraints)
        layout(placeable.height, placeable.width) {
            placeable.place(
                x = -(placeable.width / 2 - placeable.height / 2),
                y = -(placeable.height / 2 - placeable.width / 2)
            )
        }
    }

结果

Answer 2

稍微改进的 Sergei S 变体，它适用于具有Modifier.high(Intrinsic.X)的父母：

fun Modifier.rotateVertically(rotation: VerticalRotation) = then(
    object : LayoutModifier {
        override fun MeasureScope.measure(measurable: Measurable, constraints: Constraints): MeasureResult {
            val placeable = measurable.measure(constraints)
            return layout(placeable.height, placeable.width) {
                placeable.place(
                    x = -(placeable.width / 2 - placeable.height / 2),
                    y = -(placeable.height / 2 - placeable.width / 2)
                )
            }
        }

        override fun IntrinsicMeasureScope.minIntrinsicHeight(measurable: IntrinsicMeasurable, width: Int): Int {
            return measurable.maxIntrinsicWidth(width)
        }

        override fun IntrinsicMeasureScope.maxIntrinsicHeight(measurable: IntrinsicMeasurable, width: Int): Int {
            return measurable.maxIntrinsicWidth(width)
        }

        override fun IntrinsicMeasureScope.minIntrinsicWidth(measurable: IntrinsicMeasurable, height: Int): Int {
            return measurable.minIntrinsicHeight(height)
        }

        override fun IntrinsicMeasureScope.maxIntrinsicWidth(measurable: IntrinsicMeasurable, height: Int): Int {
            return measurable.maxIntrinsicHeight(height)
        }
    })
    .then(rotate(rotation.value))

enum class VerticalRotation(val value: Float) {
    CLOCKWISE(90f), COUNTER_CLOCKWISE(270f)
}