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.FromDozingTransitionInteractor 21 import com.android.systemui.keyguard.shared.model.Edge 22 import com.android.systemui.keyguard.shared.model.KeyguardState.DOZING 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 javax.inject.Inject 27 import kotlin.time.Duration.Companion.milliseconds 28 import kotlinx.coroutines.flow.Flow 29 30 /** 31 * Breaks down DOZING->LOCKSCREEN transition into discrete steps for corresponding views to consume. 32 */ 33 @SysUISingleton 34 class DozingToLockscreenTransitionViewModel 35 @Inject 36 constructor( 37 animationFlow: KeyguardTransitionAnimationFlow, 38 ) : DeviceEntryIconTransition { 39 private val transitionAnimation = 40 animationFlow.setup( 41 duration = FromDozingTransitionInteractor.TO_LOCKSCREEN_DURATION, 42 edge = Edge.create(from = DOZING, to = LOCKSCREEN), 43 ) 44 45 val shortcutsAlpha: Flow<Float> = 46 transitionAnimation.sharedFlow( 47 duration = 150.milliseconds, <lambda>null48 onStep = { it }, <lambda>null49 onCancel = { 0f }, 50 ) 51 52 // Show immediately to avoid what can appear to be a flicker on device wakeup 53 val lockscreenAlpha: Flow<Float> = transitionAnimation.immediatelyTransitionTo(1f) 54 55 val deviceEntryBackgroundViewAlpha: Flow<Float> = 56 transitionAnimation.immediatelyTransitionTo(1f) 57 58 override val deviceEntryParentViewAlpha: Flow<Float> = 59 transitionAnimation.immediatelyTransitionTo(1f) 60 } 61