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Initial implementation Drag pref group
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116 changes: 116 additions & 0 deletions
116
lawnchair/src/app/lawnchair/ui/preferences/components/layout/DraggablePreferenceGroup.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| package app.lawnchair.ui.preferences.components.layout | ||
|
|
||
| import androidx.compose.foundation.gestures.Orientation | ||
| import androidx.compose.foundation.gestures.draggable | ||
| import androidx.compose.foundation.gestures.rememberDraggableState | ||
| import androidx.compose.foundation.layout.Box | ||
| import androidx.compose.foundation.layout.Column | ||
| import androidx.compose.foundation.layout.offset | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.material3.Divider | ||
| import androidx.compose.material3.MaterialTheme | ||
| import androidx.compose.material3.Surface | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.runtime.mutableFloatStateOf | ||
| import androidx.compose.runtime.mutableStateOf | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.runtime.setValue | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.unit.Dp | ||
| import androidx.compose.ui.unit.IntOffset | ||
| import androidx.compose.ui.unit.dp | ||
| import app.lawnchair.preferences.BasePreferenceManager | ||
| import kotlin.math.roundToInt | ||
| import kotlinx.coroutines.runBlocking | ||
|
|
||
| @Composable | ||
| fun DraggablePreferenceGroup( | ||
| pref: BasePreferenceManager.StringPref, | ||
| items: List<@Composable () -> Unit>, | ||
| modifier: Modifier = Modifier, | ||
| heading: String? = null, | ||
| description: String? = null, | ||
| showDescription: Boolean = true, | ||
| showDividers: Boolean = true, | ||
| dividerStartIndent: Dp = 16.dp, | ||
| dividerEndIndent: Dp = 16.dp, | ||
| ) { | ||
| var order by remember { | ||
| mutableStateOf( | ||
| pref.get().split(",").map { it.toInt() } | ||
| ?: items.indices.toList(), | ||
| ) | ||
| } | ||
| var draggingItemIndex by remember { mutableStateOf<Int?>(null) } | ||
| var draggingOffset by remember { mutableFloatStateOf(0f) } | ||
|
|
||
| fun saveOrder(order: List<Int>) { | ||
| runBlocking { | ||
| pref.set(order.joinToString(",")) | ||
| } | ||
| } | ||
|
|
||
| Column( | ||
| modifier = modifier, | ||
| ) { | ||
| PreferenceGroupHeading(heading) | ||
| Surface( | ||
| modifier = Modifier.padding(horizontal = 16.dp), | ||
| shape = MaterialTheme.shapes.large, | ||
| tonalElevation = 1.dp, | ||
| ) { | ||
| if (showDividers) { | ||
| Column { | ||
| order.forEachIndexed { index, itemIndex -> | ||
| val isDragging = draggingItemIndex == index | ||
| Box( | ||
| modifier = Modifier | ||
| .offset { IntOffset(0, if (isDragging) draggingOffset.roundToInt() else 0) } | ||
| .draggable( | ||
| state = rememberDraggableState { delta -> | ||
| if (isDragging) { | ||
| draggingOffset += delta | ||
| } | ||
| }, | ||
| orientation = Orientation.Vertical, | ||
| onDragStarted = { | ||
| draggingItemIndex = index | ||
| draggingOffset = 0f | ||
| }, | ||
| onDragStopped = { | ||
| draggingItemIndex?.let { | ||
| val newIndex = (index + (draggingOffset / 100).roundToInt()).coerceIn(0, order.lastIndex) | ||
| order = order.toMutableList().apply { | ||
| add(newIndex, removeAt(it)) | ||
| } | ||
| saveOrder(order) | ||
| } | ||
| draggingItemIndex = null | ||
| draggingOffset = 0f | ||
| }, | ||
| ), | ||
| ) { | ||
| items[itemIndex]() | ||
| } | ||
| if (index != order.lastIndex) { | ||
| Divider( | ||
| Modifier | ||
| .padding(start = dividerStartIndent, end = dividerEndIndent), | ||
| ) | ||
| } | ||
| } | ||
| } | ||
| } else { | ||
| Column { | ||
| items.forEach { item -> | ||
| Box { | ||
| item() | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| PreferenceGroupDescription(description = description, showDescription = showDescription) | ||
| } | ||
| } |
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