1 /*
2  * Copyright (C) 2021 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.launcher3.taskbar;
17 
18 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_BUBBLES_EXPANDED;
19 import static com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_BUBBLES_MANAGE_MENU_EXPANDED;
20 
21 import android.animation.ObjectAnimator;
22 import android.view.animation.Interpolator;
23 import android.view.animation.PathInterpolator;
24 
25 import com.android.quickstep.AnimatedFloat;
26 import com.android.quickstep.SystemUiProxy;
27 
28 /**
29  * Handles properties/data collection, and passes the results to {@link TaskbarScrimView} to render.
30  */
31 public class TaskbarScrimViewController {
32 
33     private static final float SCRIM_ALPHA = 0.6f;
34 
35     private static final Interpolator SCRIM_ALPHA_IN = new PathInterpolator(0.4f, 0f, 1f, 1f);
36     private static final Interpolator SCRIM_ALPHA_OUT = new PathInterpolator(0f, 0f, 0.8f, 1f);
37 
38     private final TaskbarActivityContext mActivity;
39     private final TaskbarScrimView mScrimView;
40 
41     // Alpha property for the scrim.
42     private final AnimatedFloat mScrimAlpha = new AnimatedFloat(this::updateScrimAlpha);
43 
44     // Initialized in init.
45     private TaskbarControllers mControllers;
46 
TaskbarScrimViewController(TaskbarActivityContext activity, TaskbarScrimView scrimView)47     public TaskbarScrimViewController(TaskbarActivityContext activity, TaskbarScrimView scrimView) {
48         mActivity = activity;
49         mScrimView = scrimView;
50         mScrimView.setCornerSizes(mActivity.getLeftCornerRadius(),
51                 mActivity.getRightCornerRadius());
52         mScrimView.setBackgroundHeight(mActivity.getDeviceProfile().taskbarSize);
53     }
54 
55     /**
56      * Initializes the controller
57      */
init(TaskbarControllers controllers)58     public void init(TaskbarControllers controllers) {
59         mControllers = controllers;
60     }
61 
62     /**
63      * Updates the scrim state based on the flags.
64      */
updateStateForSysuiFlags(int stateFlags, boolean skipAnim)65     public void updateStateForSysuiFlags(int stateFlags, boolean skipAnim) {
66         final boolean bubblesExpanded = (stateFlags & SYSUI_STATE_BUBBLES_EXPANDED) != 0;
67         final boolean manageMenuExpanded =
68                 (stateFlags & SYSUI_STATE_BUBBLES_MANAGE_MENU_EXPANDED) != 0;
69         final boolean showScrim = !mControllers.navbarButtonsViewController.isImeVisible()
70                 && bubblesExpanded && mControllers.taskbarStashController.isInAppAndNotStashed();
71         final float scrimAlpha = manageMenuExpanded
72                 // When manage menu shows there's the first scrim and second scrim so figure out
73                 // what the total transparency would be.
74                 ? (SCRIM_ALPHA + (SCRIM_ALPHA * (1 - SCRIM_ALPHA)))
75                 : showScrim ? SCRIM_ALPHA : 0;
76         showScrim(showScrim, scrimAlpha, skipAnim);
77     }
78 
showScrim(boolean showScrim, float alpha, boolean skipAnim)79     private void showScrim(boolean showScrim, float alpha, boolean skipAnim) {
80         mScrimView.setOnClickListener(showScrim ? (view) -> onClick() : null);
81         mScrimView.setClickable(showScrim);
82         ObjectAnimator anim = mScrimAlpha.animateToValue(showScrim ? alpha : 0);
83         anim.setInterpolator(showScrim ? SCRIM_ALPHA_IN : SCRIM_ALPHA_OUT);
84         anim.start();
85         if (skipAnim) {
86             anim.end();
87         }
88     }
89 
updateScrimAlpha()90     private void updateScrimAlpha() {
91         mScrimView.setScrimAlpha(mScrimAlpha.value);
92     }
93 
onClick()94     private void onClick() {
95         SystemUiProxy.INSTANCE.get(mActivity).onBackPressed();
96     }
97 }
98