1 /*
2  * Copyright (C) 2021 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 package com.android.systemui.unfold
17 
18 import android.annotation.FloatRange
19 import com.android.systemui.unfold.UnfoldTransitionProgressProvider.TransitionProgressListener
20 import com.android.systemui.statusbar.policy.CallbackController
21 
22 /**
23  * Interface that allows to receive unfold transition progress updates.
24  * It can be used to update view properties based on the current animation progress.
25  * onTransitionProgress callback could be called on each frame.
26  *
27  * Use [createUnfoldTransitionProgressProvider] to create instances of this interface
28  */
29 interface UnfoldTransitionProgressProvider : CallbackController<TransitionProgressListener> {
30 
31     fun destroy()
32 
33     interface TransitionProgressListener {
34         fun onTransitionStarted() {}
35         fun onTransitionFinished() {}
36         fun onTransitionProgress(@FloatRange(from = 0.0, to = 1.0) progress: Float) {}
37     }
38 }
39