1 /*
2  * Copyright (C) 2023 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 com.android.systemui.keyguard.ui.viewmodel
18 
19 import com.android.systemui.dagger.SysUISingleton
20 import com.android.systemui.keyguard.domain.interactor.FromGoneTransitionInteractor.Companion.TO_LOCKSCREEN_DURATION
21 import com.android.systemui.keyguard.shared.model.Edge
22 import com.android.systemui.keyguard.shared.model.KeyguardState.GONE
23 import com.android.systemui.keyguard.shared.model.KeyguardState.LOCKSCREEN
24 import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow
25 import com.android.systemui.keyguard.ui.transitions.DeviceEntryIconTransition
26 import com.android.systemui.scene.shared.model.Scenes
27 import javax.inject.Inject
28 import kotlin.time.Duration.Companion.milliseconds
29 import kotlinx.coroutines.flow.Flow
30 
31 @SysUISingleton
32 class GoneToLockscreenTransitionViewModel
33 @Inject
34 constructor(
35     animationFlow: KeyguardTransitionAnimationFlow,
36 ) : DeviceEntryIconTransition {
37 
38     private val transitionAnimation =
39         animationFlow
40             .setup(
41                 duration = TO_LOCKSCREEN_DURATION,
42                 edge = Edge.create(from = Scenes.Gone, to = LOCKSCREEN),
43             )
44             .setupWithoutSceneContainer(
45                 edge = Edge.create(from = GONE, to = LOCKSCREEN),
46             )
47 
48     val shortcutsAlpha: Flow<Float> =
49         transitionAnimation.sharedFlow(
50             duration = 250.milliseconds,
<lambda>null51             onStep = { it },
<lambda>null52             onCancel = { 1f },
53         )
54 
55     val lockscreenAlpha: Flow<Float> = shortcutsAlpha
56 
57     val deviceEntryBackgroundViewAlpha: Flow<Float> =
58         transitionAnimation.immediatelyTransitionTo(1f)
59 
60     override val deviceEntryParentViewAlpha: Flow<Float> =
61         transitionAnimation.immediatelyTransitionTo(1f)
62 }
63