| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.documentsui; |
| |
| import android.content.Context; |
| import android.util.AttributeSet; |
| import android.view.KeyEvent; |
| import android.widget.ListView; |
| |
| /** |
| * The list in the navigation drawer. This class exists for the purpose of overriding the key |
| * handler on ListView. Ignoring keystrokes (e.g. the tab key) cannot be properly done using |
| * View.OnKeyListener. |
| */ |
| public class RootsList extends ListView { |
| |
| // Multiple constructors are needed to handle all the different ways this View could be |
| // constructed by the framework. Don't remove them! |
| public RootsList(Context context) { |
| super(context); |
| } |
| |
| public RootsList(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| } |
| |
| public RootsList(Context context, AttributeSet attrs, int defStyleAttr) { |
| super(context, attrs, defStyleAttr); |
| } |
| |
| public RootsList(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| @Override |
| public boolean onKeyDown(int keyCode, KeyEvent event) { |
| switch (keyCode) { |
| // Ignore tab key events - this causes them to bubble up to the global key handler where |
| // they are appropriately handled. See BaseActivity.onKeyDown. |
| case KeyEvent.KEYCODE_TAB: |
| return false; |
| // Prevent left/right arrow keystrokes from shifting focus away from the roots list. |
| case KeyEvent.KEYCODE_DPAD_LEFT: |
| case KeyEvent.KEYCODE_DPAD_RIGHT: |
| return true; |
| default: |
| return super.onKeyDown(keyCode, event); |
| } |
| } |
| } |