BringIntoViewRequester

BringIntoViewSample

@Sampled
@Composable
fun BringIntoViewSample() {
    Row(Modifier.horizontalScroll(rememberScrollState())) {
        repeat(100) {
            val bringIntoViewRequester = remember { BringIntoViewRequester() }
            val coroutineScope = rememberCoroutineScope()
            Box(
                Modifier
                    // This associates the RelocationRequester with a Composable that wants to be
                    // brought into view.
                    .bringIntoViewRequester(bringIntoViewRequester)
                    .onFocusChanged {
                        if (it.isFocused) {
                            coroutineScope.launch {
                                // This sends a request to all parents that asks them to scroll so
                                // that this item is brought into view.
                                bringIntoViewRequester.bringIntoView()
                            }
                        }
                    }
                    .focusTarget()
            )
        }
    }
}

BringPartOfComposableIntoViewSample

@Sampled
@Composable
fun BringPartOfComposableIntoViewSample() {
    with(LocalDensity.current) {
        val bringIntoViewRequester = remember { BringIntoViewRequester() }
        val coroutineScope = rememberCoroutineScope()
        Column {
            Box(
                Modifier.border(2.dp, Color.Black)
                    .size(500f.toDp())
                    .horizontalScroll(rememberScrollState())
            ) {
                Canvas(
                    Modifier.size(1500f.toDp(), 500f.toDp())
                        // This associates the RelocationRequester with a Composable that wants
                        // to be brought into view.
                        .bringIntoViewRequester(bringIntoViewRequester)
                ) {
                    drawCircle(color = Color.Red, radius = 250f, center = Offset(750f, 250f))
                }
            }
            Button(
                onClick = {
                    val circleCoordinates = Rect(500f, 0f, 1000f, 500f)
                    coroutineScope.launch {
                        // This sends a request to all parents that asks them to scroll so that
                        // the circle is brought into view.
                        bringIntoViewRequester.bringIntoView(circleCoordinates)
                    }
                }
            ) {
                Text("Bring circle into View")
            }
        }
    }
}