1 /* <lambda>null2 * 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.app.animation.Interpolators.EMPHASIZED_ACCELERATE 20 import com.android.systemui.common.ui.domain.interactor.ConfigurationInteractor 21 import com.android.systemui.dagger.SysUISingleton 22 import com.android.systemui.keyguard.domain.interactor.FromLockscreenTransitionInteractor.Companion.TO_OCCLUDED_DURATION 23 import com.android.systemui.keyguard.shared.model.Edge 24 import com.android.systemui.keyguard.shared.model.KeyguardState 25 import com.android.systemui.keyguard.shared.model.KeyguardState.OCCLUDED 26 import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow 27 import com.android.systemui.keyguard.ui.transitions.DeviceEntryIconTransition 28 import com.android.systemui.res.R 29 import com.android.systemui.shade.ShadeDisplayAware 30 import javax.inject.Inject 31 import kotlin.time.Duration.Companion.milliseconds 32 import kotlinx.coroutines.flow.Flow 33 import kotlinx.coroutines.flow.flatMapLatest 34 35 /** 36 * Breaks down LOCKSCREEN->OCCLUDED transition into discrete steps for corresponding views to 37 * consume. 38 */ 39 @SysUISingleton 40 class LockscreenToOccludedTransitionViewModel 41 @Inject 42 constructor( 43 shadeDependentFlows: ShadeDependentFlows, 44 @ShadeDisplayAware configurationInteractor: ConfigurationInteractor, 45 animationFlow: KeyguardTransitionAnimationFlow, 46 ) : DeviceEntryIconTransition { 47 48 private val transitionAnimation = 49 animationFlow.setup( 50 duration = TO_OCCLUDED_DURATION, 51 edge = Edge.create(from = KeyguardState.LOCKSCREEN, to = OCCLUDED), 52 ) 53 54 /** Lockscreen views alpha */ 55 val lockscreenAlpha: Flow<Float> = 56 shadeDependentFlows.transitionFlow( 57 flowWhenShadeIsNotExpanded = 58 transitionAnimation.sharedFlow( 59 duration = 250.milliseconds, 60 onStep = { 1f - it }, 61 name = "LOCKSCREEN->OCCLUDED: lockscreenAlpha", 62 ), 63 flowWhenShadeIsExpanded = transitionAnimation.immediatelyTransitionTo(0f), 64 ) 65 66 val shortcutsAlpha: Flow<Float> = 67 shadeDependentFlows.transitionFlow( 68 flowWhenShadeIsNotExpanded = 69 transitionAnimation.sharedFlow( 70 duration = 250.milliseconds, 71 onStep = { 1f - it }, 72 onFinish = { 0f }, 73 onCancel = { 1f }, 74 ), 75 flowWhenShadeIsExpanded = transitionAnimation.immediatelyTransitionTo(0f), 76 ) 77 78 /** Lockscreen views y-translation */ 79 val lockscreenTranslationY: Flow<Float> = 80 configurationInteractor 81 .dimensionPixelSize(R.dimen.lockscreen_to_occluded_transition_lockscreen_translation_y) 82 .flatMapLatest { translatePx -> 83 transitionAnimation.sharedFlow( 84 duration = TO_OCCLUDED_DURATION, 85 onStep = { value -> value * translatePx }, 86 // Reset on cancel or finish 87 onFinish = { 0f }, 88 onCancel = { 0f }, 89 interpolator = EMPHASIZED_ACCELERATE, 90 ) 91 } 92 93 override val deviceEntryParentViewAlpha: Flow<Float> = 94 shadeDependentFlows.transitionFlow( 95 flowWhenShadeIsNotExpanded = 96 transitionAnimation.sharedFlow( 97 duration = 250.milliseconds, 98 onStep = { 1f - it }, 99 onCancel = { 0f }, 100 ), 101 flowWhenShadeIsExpanded = transitionAnimation.immediatelyTransitionTo(0f), 102 ) 103 } 104