AnimateXAsStateClock.kt
/*
* Copyright 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.compose.ui.tooling.animation.clock
import androidx.compose.animation.core.AnimationVector
import androidx.compose.animation.core.TargetBasedAnimation
import androidx.compose.animation.tooling.ComposeAnimatedProperty
import androidx.compose.animation.tooling.TransitionInfo
import androidx.compose.ui.tooling.animation.AnimateXAsStateComposeAnimation
import androidx.compose.ui.tooling.animation.states.TargetState
/**
* [ComposeAnimationClock] for [AnimateXAsStateComposeAnimation].
*/
internal class AnimateXAsStateClock<T, V : AnimationVector>(
override val animation: AnimateXAsStateComposeAnimation<T, V>
) :
ComposeAnimationClock<AnimateXAsStateComposeAnimation<T, V>, TargetState<T>> {
override var state = TargetState(
animation.animationObject.value,
animation.animationObject.value
)
set(value) {
field = value
currAnimation = getCurrentAnimation()
setClockTime(0)
}
private var currentValue: T = animation.toolingState.value
private set(value) {
field = value
animation.toolingState.value = value
}
private var currAnimation: TargetBasedAnimation<T, V> = getCurrentAnimation()
override fun setStateParameters(par1: Any, par2: Any?) {
parseParametersToValue(currentValue, par1, par2)?.let {
state = it
}
}
override fun getAnimatedProperties(): List<ComposeAnimatedProperty> {
return listOf(ComposeAnimatedProperty(animation.label, currentValue as Any))
}
override fun getMaxDurationPerIteration(): Long {
return nanosToMillis(currAnimation.durationNanos)
}
override fun getMaxDuration(): Long {
return nanosToMillis(currAnimation.durationNanos)
}
override fun getTransitions(stepMillis: Long): List<TransitionInfo> {
return listOf(
currAnimation.createTransitionInfo(
animation.label, animation.animationSpec, stepMillis
)
)
}
private var clockTimeNanos = 0L
set(value) {
field = value
currentValue = currAnimation.getValueFromNanos(value)
}
override fun setClockTime(animationTimeNanos: Long) {
clockTimeNanos = animationTimeNanos
}
private fun getCurrentAnimation(): TargetBasedAnimation<T, V> {
return TargetBasedAnimation(
animationSpec = animation.animationSpec,
initialValue = state.initial,
targetValue = state.target,
typeConverter = animation.animationObject.typeConverter,
initialVelocity = animation.animationObject.velocity
)
}
}