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