fix: fling issues

Author: ch4rl3x

bottom-drawer-scaffold/build.gradle

@@ -8,7 +8,7 @@ apply from: '../buildCompose.gradle'
 
 ext {
     PUBLISH_GROUP_ID = 'de.charlex.compose'
-    PUBLISH_VERSION = '2.0.0-alpha01'
+    PUBLISH_VERSION = '2.0.0-alpha02'
     PUBLISH_ARTIFACT_ID = 'bottom-drawer-scaffold'
 }
 

bottom-drawer-scaffold/src/main/java/de/charlex/compose/bottomdrawerscaffold/AnchoredDraggableStateExt.kt

@@ -8,7 +8,7 @@ import androidx.compose.ui.input.nestedscroll.NestedScrollSource
 import androidx.compose.ui.unit.Velocity
 
 @OptIn(ExperimentalFoundationApi::class)
-internal fun <T> AnchoredDraggableState<T>.createPreUpPostDownNestedScrollConnection(): NestedScrollConnection {
+internal fun <T> AnchoredDraggableState<T>.createPreUpPostDownNestedScrollConnection(topOffset: Int): NestedScrollConnection {
     return object : NestedScrollConnection {
         override fun onPreScroll(available: Offset, source: NestedScrollSource): Offset {
             val delta = available.toFloat()
@@ -33,8 +33,7 @@ internal fun <T> AnchoredDraggableState<T>.createPreUpPostDownNestedScrollConnec
 
         override suspend fun onPreFling(available: Velocity): Velocity {
             val toFling = Offset(available.x, available.y).toFloat()
-//            return if (toFling < 0 && offset.value > minBound) {
-            return if (toFling < 0) {
+            return if (toFling < 0 && offset > topOffset) {
                 settle(velocity = toFling)
                 // since we go to the anchor with tween settling, consume all for the best UX
                 available

bottom-drawer-scaffold/src/main/java/de/charlex/compose/bottomdrawerscaffold/BottomDrawerScaffold.kt

@@ -42,6 +42,7 @@ import androidx.compose.ui.graphics.Shape
 import androidx.compose.ui.input.nestedscroll.nestedScroll
 import androidx.compose.ui.layout.Layout
 import androidx.compose.ui.layout.onGloballyPositioned
+import androidx.compose.ui.platform.LocalConfiguration
 import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.semantics.collapse
 import androidx.compose.ui.semantics.expand
@@ -61,14 +62,15 @@ fun rememberBottomDrawerScaffoldState(
     confirmValueChange: (newValue: BottomDrawerValue) -> Boolean = { true }
 ): AnchoredDraggableState<BottomDrawerValue> {
     val density = LocalDensity.current
+    val maxHeight = with(density) { LocalConfiguration.current.screenHeightDp.dp.toPx() }
     return remember {
         AnchoredDraggableState(
             initialValue = initialValue,
             positionalThreshold = positionalThreshold,
             velocityThreshold = velocityThreshold ?: { with(density) { 100.dp.toPx() } },
             animationSpec = animationSpec,
             anchors = DraggableAnchors {
-                BottomDrawerValue.Collapsed at 0f
+                BottomDrawerValue.Collapsed at maxHeight
                 BottomDrawerValue.Expanded at 0f
             },
             confirmValueChange = confirmValueChange
@@ -86,9 +88,7 @@ fun BottomDrawerScaffold(
     bottomBar: @Composable (() -> Unit)? = null,
     gesturesEnabled: Boolean = true,
     drawerModifier: Modifier = Modifier,
-//    snackbarHostState: SnackbarHostState,
     snackbarHost: @Composable () -> Unit = {},
-//    snackbarHost: @Composable (SnackbarHostState) -> Unit = { SnackbarHost(it) },
     floatingActionButton: @Composable (() -> Unit)? = null,
     floatingActionButtonPosition: FabPosition = FabPosition.End,
     drawerGesturesEnabled: Boolean? = null,
@@ -143,7 +143,7 @@ fun BottomDrawerScaffold(
 
             val anchoredDraggableModifier = Modifier
                 .nestedScroll(
-                    bottomDrawerScaffoldState.createPreUpPostDownNestedScrollConnection()
+                    bottomDrawerScaffoldState.createPreUpPostDownNestedScrollConnection(topPadding.toInt())
                 )
                 .anchoredDraggable(
                     state = bottomDrawerScaffoldState,