Aurimas Liutikas | 88c7ff1 | 2023-08-10 12:42:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 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 | package com.android.keyguard.clock; |
| 17 | |
| 18 | import android.view.View; |
| 19 | |
| 20 | /** |
| 21 | * Controls transition to dark state by cross fading between views. |
| 22 | */ |
| 23 | final class CrossFadeDarkController { |
| 24 | |
| 25 | private final View mFadeInView; |
| 26 | private final View mFadeOutView; |
| 27 | |
| 28 | /** |
| 29 | * Creates a new controller that fades between views. |
| 30 | * |
| 31 | * @param fadeInView View to fade in when transitioning to AOD. |
| 32 | * @param fadeOutView View to fade out when transitioning to AOD. |
| 33 | */ |
| 34 | CrossFadeDarkController(View fadeInView, View fadeOutView) { |
| 35 | mFadeInView = fadeInView; |
| 36 | mFadeOutView = fadeOutView; |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * Sets the amount the system has transitioned to the dark state. |
| 41 | * |
| 42 | * @param darkAmount Amount of transition to dark state: 1f for AOD and 0f for lock screen. |
| 43 | */ |
| 44 | void setDarkAmount(float darkAmount) { |
| 45 | mFadeInView.setAlpha(Math.max(0f, 2f * darkAmount - 1f)); |
| 46 | if (darkAmount == 0f) { |
| 47 | mFadeInView.setVisibility(View.GONE); |
| 48 | } else { |
| 49 | if (mFadeInView.getVisibility() == View.GONE) { |
| 50 | mFadeInView.setVisibility(View.VISIBLE); |
| 51 | } |
| 52 | } |
| 53 | mFadeOutView.setAlpha(Math.max(0f, 1f - 2f * darkAmount)); |
| 54 | if (darkAmount == 1f) { |
| 55 | mFadeOutView.setVisibility(View.GONE); |
| 56 | } else { |
| 57 | if (mFadeOutView.getVisibility() == View.GONE) { |
| 58 | mFadeOutView.setVisibility(View.VISIBLE); |
| 59 | } |
| 60 | } |
| 61 | } |
| 62 | } |