TransitionState.kt
/*
* Copyright 2019 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.
*/
@file:Suppress("DEPRECATION")
package androidx.compose.animation.core
internal open class StateImpl<T>(
val name: T
) : TransitionDefinition.MutableTransitionState, TransitionState {
internal val props: MutableMap<PropKey<Any, AnimationVector>, Any> = mutableMapOf()
override operator fun <T, V : AnimationVector> set(propKey: PropKey<T, V>, prop: T) {
@Suppress("UNCHECKED_CAST")
propKey as PropKey<Any, AnimationVector>
if (props[propKey] != null) {
throw IllegalArgumentException("prop name $propKey already exists")
}
props[propKey] = prop as Any
}
@Suppress("UNCHECKED_CAST")
override operator fun <T, V : AnimationVector> get(propKey: PropKey<T, V>): T {
propKey as PropKey<Any, AnimationVector>
return props[propKey] as T
}
}
/**
* [TransitionState] holds a number of property values. The value of a property can be queried via
* [get], providing its property key.
*/
@Deprecated("Please use updateTransition or rememberInfiniteTransition instead.")
interface TransitionState {
operator fun <T, V : AnimationVector> get(propKey: PropKey<T, V>): T
}