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      1 /*
      2  * Copyright (C) 2015 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.stackdivider;
     18 
     19 import android.content.Context;
     20 import android.graphics.PixelFormat;
     21 import android.os.Binder;
     22 import android.view.View;
     23 import android.view.WindowManager;
     24 
     25 import static android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
     26 import static android.view.WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
     27 import static android.view.WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL;
     28 import static android.view.WindowManager.LayoutParams.FLAG_SLIPPERY;
     29 import static android.view.WindowManager.LayoutParams.FLAG_SPLIT_TOUCH;
     30 import static android.view.WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;
     31 import static android.view.WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
     32 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_NO_MOVE_ANIMATION;
     33 import static android.view.WindowManager.LayoutParams.TYPE_DOCK_DIVIDER;
     34 
     35 /**
     36  * Manages the window parameters of the docked stack divider.
     37  */
     38 public class DividerWindowManager {
     39 
     40     private static final String WINDOW_TITLE = "DockedStackDivider";
     41 
     42     private final WindowManager mWindowManager;
     43     private WindowManager.LayoutParams mLp;
     44     private View mView;
     45 
     46     public DividerWindowManager(Context ctx) {
     47         mWindowManager = ctx.getSystemService(WindowManager.class);
     48     }
     49 
     50     public void add(View view, int width, int height) {
     51         mLp = new WindowManager.LayoutParams(
     52                 width, height, TYPE_DOCK_DIVIDER,
     53                 FLAG_NOT_FOCUSABLE | FLAG_NOT_TOUCH_MODAL
     54                         | FLAG_WATCH_OUTSIDE_TOUCH | FLAG_SPLIT_TOUCH | FLAG_SLIPPERY,
     55                 PixelFormat.TRANSLUCENT);
     56         mLp.token = new Binder();
     57         mLp.setTitle(WINDOW_TITLE);
     58         mLp.privateFlags |= PRIVATE_FLAG_NO_MOVE_ANIMATION;
     59         mLp.layoutInDisplayCutoutMode = LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
     60         view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
     61                 | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
     62                 | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
     63         mWindowManager.addView(view, mLp);
     64         mView = view;
     65     }
     66 
     67     public void remove() {
     68         if (mView != null) {
     69             mWindowManager.removeView(mView);
     70         }
     71         mView = null;
     72     }
     73 
     74     public void setSlippery(boolean slippery) {
     75         boolean changed = false;
     76         if (slippery && (mLp.flags & FLAG_SLIPPERY) == 0) {
     77             mLp.flags |= FLAG_SLIPPERY;
     78             changed = true;
     79         } else if (!slippery && (mLp.flags & FLAG_SLIPPERY) != 0) {
     80             mLp.flags &= ~FLAG_SLIPPERY;
     81             changed = true;
     82         }
     83         if (changed) {
     84             mWindowManager.updateViewLayout(mView, mLp);
     85         }
     86     }
     87 
     88     public void setTouchable(boolean touchable) {
     89         boolean changed = false;
     90         if (!touchable && (mLp.flags & FLAG_NOT_TOUCHABLE) == 0) {
     91             mLp.flags |= FLAG_NOT_TOUCHABLE;
     92             changed = true;
     93         } else if (touchable && (mLp.flags & FLAG_NOT_TOUCHABLE) != 0) {
     94             mLp.flags &= ~FLAG_NOT_TOUCHABLE;
     95             changed = true;
     96         }
     97         if (changed) {
     98             mWindowManager.updateViewLayout(mView, mLp);
     99         }
    100     }
    101 }
    102