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Add more control options for the hide/show animation.
There are now 4 parameters you can control: - hideDelayMillis - hideDisplacement - hideEasingAnimation - durationAnimationMillis
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100
lib/src/main/java/my/nanihadesuka/compose/foundation/ScrollbarLayoutState.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| package my.nanihadesuka.compose.foundation | ||
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| import androidx.compose.animation.animateColorAsState | ||
| import androidx.compose.animation.core.animateDpAsState | ||
| import androidx.compose.animation.core.animateFloatAsState | ||
| import androidx.compose.animation.core.tween | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.LaunchedEffect | ||
| import androidx.compose.runtime.State | ||
| import androidx.compose.runtime.derivedStateOf | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.runtime.mutableStateOf | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.runtime.rememberUpdatedState | ||
| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.unit.Dp | ||
| import androidx.compose.ui.unit.dp | ||
| import kotlinx.coroutines.delay | ||
| import my.nanihadesuka.compose.ScrollbarSelectionActionable | ||
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| @Composable | ||
| internal fun rememberScrollbarLayoutState( | ||
| thumbIsInAction: Boolean, | ||
| thumbIsSelected: Boolean, | ||
| settings: ScrollbarLayoutSettings, | ||
| ): ScrollbarLayoutState { | ||
| val settingsUpdated by rememberUpdatedState(settings) | ||
| val thumbIsInActionUpdated by rememberUpdatedState(thumbIsInAction) | ||
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| val isInActionSelectable = remember { mutableStateOf(thumbIsInAction) } | ||
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| LaunchedEffect(thumbIsInAction) { | ||
| if (thumbIsInAction) { | ||
| isInActionSelectable.value = true | ||
| } else { | ||
| delay(timeMillis = settingsUpdated.durationAnimationMillis.toLong() + settingsUpdated.hideDelayMillis.toLong()) | ||
| isInActionSelectable.value = false | ||
| } | ||
| } | ||
|
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| val activeDraggableModifier = remember { | ||
| derivedStateOf { | ||
| when (settingsUpdated.selectionActionable) { | ||
| ScrollbarSelectionActionable.Always -> true | ||
| ScrollbarSelectionActionable.WhenVisible -> isInActionSelectable.value | ||
| } | ||
| } | ||
| } | ||
|
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| val thumbColor = animateColorAsState( | ||
| targetValue = if (thumbIsSelected) settingsUpdated.thumbSelectedColor else settingsUpdated.thumbUnselectedColor, | ||
| animationSpec = tween(durationMillis = 50), | ||
| label = "scrollbar thumb color value" | ||
| ) | ||
|
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| val currentDurationMillis = remember { | ||
| derivedStateOf { | ||
| val reductionRatio: Int = if (thumbIsInActionUpdated) 4 else 1 | ||
| settingsUpdated.durationAnimationMillis / reductionRatio | ||
| } | ||
| } | ||
|
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| val hideAlpha = animateFloatAsState( | ||
| targetValue = if (thumbIsInActionUpdated) 1f else 0f, | ||
| animationSpec = tween( | ||
| durationMillis = currentDurationMillis.value, | ||
| delayMillis = if (thumbIsInActionUpdated) 0 else settingsUpdated.hideDelayMillis, | ||
| easing = settingsUpdated.hideEasingAnimation | ||
| ), | ||
| label = "scrollbar alpha value" | ||
| ) | ||
|
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| val hideDisplacement = animateDpAsState( | ||
| targetValue = if (thumbIsInActionUpdated) 0.dp else settingsUpdated.hideDisplacement, | ||
| animationSpec = tween( | ||
| durationMillis = currentDurationMillis.value, | ||
| delayMillis = if (thumbIsInActionUpdated) 0 else settingsUpdated.hideDelayMillis, | ||
| easing = settingsUpdated.hideEasingAnimation | ||
| ), | ||
| label = "scrollbar displacement value" | ||
| ) | ||
|
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| return remember { | ||
| ScrollbarLayoutState( | ||
| activeDraggableModifier = activeDraggableModifier, | ||
| thumbColor = thumbColor, | ||
| hideDisplacement = hideDisplacement, | ||
| hideAlpha = hideAlpha | ||
| ) | ||
| } | ||
|
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| } | ||
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| internal data class ScrollbarLayoutState( | ||
| val activeDraggableModifier: State<Boolean>, | ||
| val thumbColor: State<Color>, | ||
| val hideAlpha: State<Float>, | ||
| val hideDisplacement: State<Dp> | ||
| ) |
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