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enum class States { | |
EXPANDED, | |
COLLAPSED | |
} | |
@ExperimentalMaterialApi | |
@Composable | |
fun FullHeightBottomSheet( | |
header: @Composable () -> Unit, | |
body: @Composable () -> Unit | |
) { | |
val swipeableState = rememberSwipeableState(initialValue = States.EXPANDED) | |
val scrollState = rememberScrollState() | |
BoxWithConstraints { | |
val constraintsScope = this | |
val maxHeight = with(LocalDensity.current) { | |
constraintsScope.maxHeight.toPx() | |
} | |
val connection = remember { | |
object : NestedScrollConnection { | |
override fun onPreScroll( | |
available: Offset, | |
source: NestedScrollSource | |
): Offset { | |
val delta = available.y | |
return if (delta < 0) { | |
swipeableState.performDrag(delta).toOffset() | |
} else { | |
Offset.Zero | |
} | |
} | |
override fun onPostScroll( | |
consumed: Offset, | |
available: Offset, | |
source: NestedScrollSource | |
): Offset { | |
val delta = available.y | |
return swipeableState.performDrag(delta).toOffset() | |
} | |
override suspend fun onPreFling(available: Velocity): Velocity { | |
return if (available.y < 0 && scrollState.value == 0) { | |
swipeableState.performFling(available.y) | |
available | |
} else { | |
Velocity.Zero | |
} | |
} | |
override suspend fun onPostFling( | |
consumed: Velocity, | |
available: Velocity | |
): Velocity { | |
swipeableState.performFling(velocity = available.y) | |
return super.onPostFling(consumed, available) | |
} | |
private fun Float.toOffset() = Offset(0f, this) | |
} | |
} | |
Box( | |
Modifier | |
.swipeable( | |
state = swipeableState, | |
orientation = Orientation.Vertical, | |
anchors = mapOf( | |
0f to States.EXPANDED, | |
maxHeight to States.COLLAPSED, | |
) | |
) | |
.nestedScroll(connection) | |
.offset { | |
IntOffset( | |
0, | |
swipeableState.offset.value.roundToInt() | |
) | |
} | |
) { | |
Column( | |
Modifier | |
.fillMaxHeight() | |
.background(Color.White) | |
) { | |
header() | |
Box( | |
Modifier | |
.fillMaxWidth() | |
.verticalScroll(scrollState) | |
) { | |
body() | |
} | |
} | |
} | |
} | |
} |
Hey Guys, Where is the toOffset()
method in swipeableState.performDrag(delta).toOffset()
coming from? Its not resolving for me.
Oh Sorry, Got it, Didn't see the extension function created below.
Hello, How can I make it so that I can move the bottom sheet only for the area with LazyColumn?
If you want swipeable
behavior to occur only when interacting with the actual bottom sheet content Modifier.offset()
should be before Modifier.swipeable()
.
Modifier
.offset {
IntOffset(
0,
swipeableState.offset.value.roundToInt()
)
}
.swipeable(
state = swipeableState,
orientation = Orientation.Vertical,
anchors = mapOf(
0f to States.EXPANDED,
maxHeight to States.COLLAPSED,
)
)
.nestedScroll(connection)
This looks great. One issue I've noticed though is that when the bottom sheet is expanded and you scroll the content, it doesn't use momentum scrolling.
If you want
swipeable
behavior to occur only when interacting with the actual bottom sheet contentModifier.offset()
should be beforeModifier.swipeable()
.Modifier .offset { IntOffset( 0, swipeableState.offset.value.roundToInt() ) } .swipeable( state = swipeableState, orientation = Orientation.Vertical, anchors = mapOf( 0f to States.EXPANDED, maxHeight to States.COLLAPSED, ) ) .nestedScroll(connection)
Life Saver. Thank you!!
This is amazing @arcadefire 🪨 ⭐ !!
@nkrebs13 8 minutes looks enough for me, ship it!