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.FromOccludedTransitionInteractor 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.OCCLUDED 24 import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow 25 import javax.inject.Inject 26 import kotlin.time.Duration.Companion.milliseconds 27 import kotlinx.coroutines.ExperimentalCoroutinesApi 28 import kotlinx.coroutines.flow.Flow 29 30 /** 31 * Breaks down OCCLUDED->DOZING transition into discrete steps for corresponding views to consume. 32 */ 33 @ExperimentalCoroutinesApi 34 @SysUISingleton 35 class OccludedToDozingTransitionViewModel 36 @Inject 37 constructor( 38 animationFlow: KeyguardTransitionAnimationFlow, 39 ) { 40 private val transitionAnimation = 41 animationFlow.setup( 42 duration = FromOccludedTransitionInteractor.TO_DOZING_DURATION, 43 edge = Edge.create(from = OCCLUDED, to = DOZING), 44 ) 45 46 /** Lockscreen views alpha */ 47 val lockscreenAlpha: Flow<Float> = 48 transitionAnimation.sharedFlow( 49 startTime = 233.milliseconds, 50 duration = 250.milliseconds, <lambda>null51 onStep = { it }, 52 ) 53 } 54