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ScrollableColumn and LazyScrollableColumn for Compose for desktop
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| import androidx.compose.foundation.ScrollState | |
| import androidx.compose.foundation.VerticalScrollbar | |
| import androidx.compose.foundation.gestures.FlingBehavior | |
| import androidx.compose.foundation.layout.Arrangement | |
| import androidx.compose.foundation.layout.Column | |
| import androidx.compose.foundation.layout.ColumnScope | |
| import androidx.compose.foundation.layout.PaddingValues | |
| import androidx.compose.foundation.layout.padding | |
| import androidx.compose.foundation.lazy.LazyColumn | |
| import androidx.compose.foundation.lazy.LazyListScope | |
| import androidx.compose.foundation.lazy.LazyListState | |
| import androidx.compose.foundation.rememberScrollbarAdapter | |
| import androidx.compose.foundation.verticalScroll | |
| import androidx.compose.runtime.Composable | |
| import androidx.compose.ui.Alignment | |
| import androidx.compose.ui.Modifier | |
| import androidx.compose.ui.layout.Layout | |
| import androidx.compose.ui.unit.Constraints | |
| import kotlin.math.max | |
| @Composable | |
| actual fun ScrollableLazyColumnImpl( | |
| modifier: Modifier, | |
| state: LazyListState, | |
| contentPadding: PaddingValues, | |
| reverseLayout: Boolean, | |
| verticalArrangement: Arrangement.Vertical, | |
| horizontalAlignment: Alignment.Horizontal, | |
| flingBehavior: FlingBehavior, | |
| userScrollEnabled: Boolean, | |
| content: LazyListScope.() -> Unit | |
| ) { | |
| ScrollableWrapper(modifier) { | |
| LazyColumn( | |
| state = state, | |
| contentPadding = contentPadding, | |
| reverseLayout = reverseLayout, | |
| verticalArrangement = verticalArrangement, | |
| horizontalAlignment = horizontalAlignment, | |
| flingBehavior = flingBehavior, | |
| userScrollEnabled = userScrollEnabled, | |
| content = content, | |
| ) | |
| VerticalScrollbar(adapter = rememberScrollbarAdapter(state)) | |
| } | |
| } | |
| @Composable | |
| actual fun ScrollableColumnImpl( | |
| modifier: Modifier, | |
| state: ScrollState, | |
| verticalArrangement: Arrangement.Vertical, | |
| horizontalAlignment: Alignment.Horizontal, | |
| contentPadding: PaddingValues, | |
| content: @Composable ColumnScope.() -> Unit | |
| ) { | |
| ScrollableWrapper(modifier) { | |
| Column( | |
| modifier = Modifier | |
| .padding(contentPadding) | |
| .verticalScroll(state), | |
| verticalArrangement = verticalArrangement, | |
| horizontalAlignment = horizontalAlignment, | |
| content = content, | |
| ) | |
| VerticalScrollbar(adapter = rememberScrollbarAdapter(state)) | |
| } | |
| } | |
| @Composable | |
| private fun ScrollableWrapper(modifier: Modifier, content: @Composable () -> Unit) { | |
| Layout( | |
| content = content, | |
| modifier = modifier, | |
| ) { measurables, constraints -> | |
| val columnPlaceable = measurables[0].measure(constraints) | |
| val scrollbarPlaceable = measurables[1].measure( | |
| Constraints( | |
| minHeight = columnPlaceable.height, | |
| maxHeight = columnPlaceable.height, | |
| maxWidth = constraints.maxWidth, | |
| ) | |
| ) | |
| layout(columnPlaceable.width, columnPlaceable.height) { | |
| columnPlaceable.place(0, 0) | |
| scrollbarPlaceable.place(max(0, columnPlaceable.width - scrollbarPlaceable.width), 0) | |
| } | |
| } | |
| } |
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