1 /* 2 * Copyright (C) 2025 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.DREAMING 24 import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow 25 import javax.inject.Inject 26 import kotlinx.coroutines.flow.Flow 27 28 /** 29 * Breaks down DOZING->DREAMING transition into discrete steps for corresponding views to consume. 30 */ 31 @SysUISingleton 32 class DozingToDreamingTransitionViewModel 33 @Inject 34 constructor(animationFlow: KeyguardTransitionAnimationFlow) { 35 private val transitionAnimation = 36 animationFlow.setup( 37 duration = FromDozingTransitionInteractor.TO_DREAMING_DURATION, 38 edge = Edge.create(from = DOZING, to = DREAMING), 39 ) 40 41 val lockscreenAlpha: Flow<Float> = transitionAnimation.immediatelyTransitionTo(0f) 42 } 43