1 /*
2  * Copyright (C) 2020 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.systemui.globalactions;
17 
18 import android.annotation.NonNull;
19 import android.annotation.Nullable;
20 import android.content.Context;
21 import android.content.res.Resources;
22 import android.util.LayoutDirection;
23 import android.view.View;
24 import android.view.View.MeasureSpec;
25 import android.widget.AdapterView;
26 import android.widget.ListAdapter;
27 import android.widget.ListPopupWindow;
28 import android.widget.ListView;
29 
30 import com.android.systemui.R;
31 
32 /**
33  * Customized widget for use in the GlobalActionsDialog. Ensures common positioning and user
34  * interactions.
35  *
36  * It should be created with a {@link Context} with the right theme
37  */
38 public class GlobalActionsPopupMenu extends ListPopupWindow {
39     private Context mContext;
40     private boolean mIsDropDownMode;
41     private int mMenuVerticalPadding = 0;
42     private int mGlobalActionsSidePadding = 0;
43     private int mMaximumWidthThresholdDp = 800;
44     private ListAdapter mAdapter;
45     private AdapterView.OnItemLongClickListener mOnItemLongClickListener;
46 
GlobalActionsPopupMenu(@onNull Context context, boolean isDropDownMode)47     public GlobalActionsPopupMenu(@NonNull Context context, boolean isDropDownMode) {
48         super(context);
49         mContext = context;
50         Resources res = mContext.getResources();
51         setBackgroundDrawable(
52                 res.getDrawable(R.drawable.global_actions_popup_bg, context.getTheme()));
53         mIsDropDownMode = isDropDownMode;
54 
55         setInputMethodMode(INPUT_METHOD_NOT_NEEDED);
56         setModal(true);
57 
58         mGlobalActionsSidePadding = res.getDimensionPixelSize(R.dimen.global_actions_side_margin);
59         if (!isDropDownMode) {
60             mMenuVerticalPadding = res.getDimensionPixelSize(R.dimen.control_menu_vertical_padding);
61         }
62     }
63 
64     /**
65      * Set the listadapter used to populate this menu.
66      */
setAdapter(@ullable ListAdapter adapter)67     public void setAdapter(@Nullable ListAdapter adapter) {
68         mAdapter = adapter;
69         super.setAdapter(adapter);
70     }
71 
72     /**
73       * Show the dialog.
74       */
show()75     public void show() {
76         // need to call show() first in order to construct the listView
77         super.show();
78         if (mOnItemLongClickListener != null) {
79             getListView().setOnItemLongClickListener(mOnItemLongClickListener);
80         }
81 
82         ListView listView = getListView();
83         Resources res = mContext.getResources();
84 
85         setVerticalOffset(-getAnchorView().getHeight() / 2);
86 
87         if (mIsDropDownMode) {
88             // use a divider
89             listView.setDividerHeight(res.getDimensionPixelSize(R.dimen.control_list_divider));
90             listView.setDivider(res.getDrawable(R.drawable.global_actions_list_divider_inset));
91         } else {
92             if (mAdapter == null) return;
93 
94             // width should be between [.5, .9] of screen
95             int parentWidth = res.getSystem().getDisplayMetrics().widthPixels;
96             float parentDensity = res.getSystem().getDisplayMetrics().density;
97             float parentWidthDp = parentWidth / parentDensity;
98             int widthSpec = MeasureSpec.makeMeasureSpec(
99                     (int) (parentWidth * 0.9), MeasureSpec.AT_MOST);
100             int maxWidth = 0;
101             for (int i = 0; i < mAdapter.getCount(); i++) {
102                 View child = mAdapter.getView(i, null, listView);
103                 child.measure(widthSpec, MeasureSpec.UNSPECIFIED);
104                 int w = child.getMeasuredWidth();
105                 maxWidth = Math.max(w, maxWidth);
106             }
107 
108             int width = maxWidth;
109             if (parentWidthDp < mMaximumWidthThresholdDp) {
110                 width = Math.max(maxWidth, (int) (parentWidth * 0.5));
111             }
112             listView.setPadding(0, mMenuVerticalPadding, 0, mMenuVerticalPadding);
113             setWidth(width);
114             if (getAnchorView().getLayoutDirection() == LayoutDirection.LTR) {
115                 setHorizontalOffset(getAnchorView().getWidth() - mGlobalActionsSidePadding - width);
116             } else {
117                 setHorizontalOffset(mGlobalActionsSidePadding);
118             }
119         }
120 
121         super.show();
122     }
123 
setOnItemLongClickListener(AdapterView.OnItemLongClickListener listener)124     public void setOnItemLongClickListener(AdapterView.OnItemLongClickListener listener) {
125         mOnItemLongClickListener = listener;
126     }
127 }
128