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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.updates
17 
18 import androidx.annotation.FloatRange
19 import androidx.annotation.IntDef
20 import com.android.systemui.unfold.updates.FoldStateProvider.FoldUpdatesListener
21 import com.android.systemui.unfold.util.CallbackController
22 
23 /**
24  * Allows to subscribe to main events related to fold/unfold process such as hinge angle update,
25  * start folding/unfolding, screen availability
26  */
27 interface FoldStateProvider : CallbackController<FoldUpdatesListener> {
startnull28     fun start()
29     fun stop()
30 
31     val isFinishedOpening: Boolean
32 
33     interface FoldUpdatesListener {
34         fun onHingeAngleUpdate(@FloatRange(from = 0.0, to = 180.0) angle: Float) {}
35         fun onFoldUpdate(@FoldUpdate update: Int) {}
36         fun onUnfoldedScreenAvailable() {}
37     }
38 
39     @IntDef(
40         value =
41             [
42                 FOLD_UPDATE_START_OPENING,
43                 FOLD_UPDATE_START_CLOSING,
44                 FOLD_UPDATE_FINISH_HALF_OPEN,
45                 FOLD_UPDATE_FINISH_FULL_OPEN,
46                 FOLD_UPDATE_FINISH_CLOSED])
47     @Retention(AnnotationRetention.SOURCE)
48     annotation class FoldUpdate
49 }
50 
51 const val FOLD_UPDATE_START_OPENING = 0
52 const val FOLD_UPDATE_START_CLOSING = 1
53 const val FOLD_UPDATE_FINISH_HALF_OPEN = 2
54 const val FOLD_UPDATE_FINISH_FULL_OPEN = 3
55 const val FOLD_UPDATE_FINISH_CLOSED = 4
56