1 /*
2  * Copyright 2022 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package androidx.compose.ui.tooling.animation
18 
19 import androidx.compose.runtime.Composable
20 import androidx.compose.runtime.State
21 import androidx.compose.runtime.getValue
22 import androidx.compose.runtime.mutableStateOf
23 import androidx.compose.runtime.setValue
24 
25 /**
26  * Tooling can override [mutableStateOf] in [Composable] with [ToolingState]. [Composable] should
27  * declare a state, which could be private:
28  *
29  *      val toolingOverride = remember { mutableStateOf<State<T>?>(null) }
30  *
31  * Tooling overrides `toolingOverride` with
32  *
33  *      toolingOverride.value = ToolingState(default)
34  *
35  * @param default default value
36  */
37 class ToolingState<T>(default: T) : State<T> {
38     override var value by mutableStateOf(default)
39 }
40