1 /* 2 * Copyright (C) 2024 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.Companion.TO_GONE_DURATION 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.GONE 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 /** Breaks down DOZING->GONE transition into discrete steps for corresponding views to consume. */ 32 @SysUISingleton 33 class DozingToGoneTransitionViewModel 34 @Inject 35 constructor( 36 animationFlow: KeyguardTransitionAnimationFlow, 37 ) : DeviceEntryIconTransition { 38 39 private val transitionAnimation = 40 animationFlow 41 .setup( 42 duration = TO_GONE_DURATION, 43 edge = Edge.create(from = DOZING, to = Scenes.Gone), 44 ) 45 .setupWithoutSceneContainer( 46 edge = Edge.create(from = DOZING, to = GONE), 47 ) 48 lockscreenAlphanull49 fun lockscreenAlpha(viewState: ViewStateAccessor): Flow<Float> { 50 return transitionAnimation.sharedFlow( 51 duration = 200.milliseconds, 52 onStart = { 0f }, 53 onStep = { 0f }, 54 ) 55 } 56 57 override val deviceEntryParentViewAlpha: Flow<Float> = 58 transitionAnimation.immediatelyTransitionTo(0f) 59 } 60