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Updated ComposableDestinationOwner to use a separate ComposableDestin…
…ationAnimations class for managing animation behaviour, based on SeekableTransitionState
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96
...src/main/java/dev/enro/destination/compose/destination/ComposableDestinationAnimations.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| package dev.enro.destination.compose.destination | ||
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| import androidx.compose.animation.EnterExitState | ||
| import androidx.compose.animation.EnterTransition | ||
| import androidx.compose.animation.ExitTransition | ||
| import androidx.compose.animation.core.SeekableTransitionState | ||
| import androidx.compose.animation.core.Transition | ||
| import androidx.compose.animation.core.rememberTransition | ||
| import androidx.compose.animation.core.tween | ||
| import androidx.compose.animation.fadeOut | ||
| import androidx.compose.material.ExperimentalMaterialApi | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.LaunchedEffect | ||
| import androidx.compose.runtime.derivedStateOf | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.runtime.mutableStateOf | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.runtime.setValue | ||
| import dev.enro.animation.NavigationAnimation | ||
| import dev.enro.core.compose.destination.ComposableDestinationOwner | ||
| import dev.enro.core.compose.dialog.BottomSheetDestination | ||
| import dev.enro.core.compose.dialog.DialogDestination | ||
| import dev.enro.core.container.getAnimationsForEntering | ||
| import dev.enro.core.container.getAnimationsForExiting | ||
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|
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| internal sealed class AnimationEvent { | ||
| data class AnimateTo(val visible: Boolean) : AnimationEvent() | ||
| data class SnapTo(val visible: Boolean) : AnimationEvent() | ||
| data class Seek(val progress: Float, val visible: Boolean) : AnimationEvent() | ||
| } | ||
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| internal class ComposableDestinationAnimations( | ||
| private val owner: ComposableDestinationOwner, | ||
| ) { | ||
| private var currentAnimationEvent by mutableStateOf<AnimationEvent>(AnimationEvent.SnapTo(false)) | ||
| private val visibilityState = SeekableTransitionState(false) | ||
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| internal var animationOverride by mutableStateOf<NavigationAnimation.Composable?>(null) | ||
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| internal lateinit var enterExitTransition: Transition<EnterExitState> | ||
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| val isAnimating by derivedStateOf { | ||
| when(currentAnimationEvent) { | ||
| is AnimationEvent.AnimateTo -> visibilityState.targetState != visibilityState.currentState | ||
| is AnimationEvent.SnapTo -> false | ||
| is AnimationEvent.Seek -> true | ||
| } | ||
| } | ||
|
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| internal fun setAnimationEvent(event: AnimationEvent) { | ||
| currentAnimationEvent = event | ||
| } | ||
|
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| @OptIn(ExperimentalMaterialApi::class) | ||
| @Composable | ||
| fun Animate(content: @Composable () -> Unit) { | ||
| val targetState = visibilityState.targetState | ||
| val instruction = owner.instruction | ||
| val parentContainer = owner.parentContainer | ||
|
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| val animation = remember( | ||
| instruction, | ||
| targetState, | ||
| parentContainer, | ||
| animationOverride | ||
| ) { | ||
| animationOverride ?: when (owner.destination) { | ||
| is DialogDestination -> NavigationAnimation.Composable(EnterTransition.None, ExitTransition.None) | ||
| is BottomSheetDestination -> NavigationAnimation.Composable( | ||
| enter = EnterTransition.None, | ||
| exit = fadeOut(tween(75, 150)), | ||
| ) | ||
| else -> when { | ||
| visibilityState.targetState >= visibilityState.currentState -> parentContainer.getAnimationsForEntering(instruction).asComposable() | ||
| else -> parentContainer.getAnimationsForExiting(instruction).asComposable() | ||
| } | ||
| } | ||
| } | ||
|
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| LaunchedEffect(currentAnimationEvent) { | ||
| val event = currentAnimationEvent | ||
| when(event) { | ||
| is AnimationEvent.AnimateTo -> visibilityState.animateTo(event.visible) | ||
| is AnimationEvent.SnapTo -> visibilityState.snapTo(event.visible) | ||
| is AnimationEvent.Seek -> visibilityState.seekTo(event.progress, event.visible) | ||
| } | ||
| } | ||
|
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| animation.Animate( | ||
| visible = rememberTransition(visibilityState, "ComposableDestination Visibility"), | ||
| ) { | ||
| enterExitTransition = it | ||
| content() | ||
| } | ||
| } | ||
| } |
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