Steve McKay | 6bbed4d | 2015-08-17 13:18:05 -0700 | [diff] [blame] | 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.documentsui; |
| 18 | |
| 19 | import static com.android.internal.util.Preconditions.checkArgument; |
| 20 | |
| 21 | import android.app.Activity; |
| 22 | import android.support.v4.app.ActionBarDrawerToggle; |
| 23 | import android.support.v4.widget.DrawerLayout; |
| 24 | import android.support.v4.widget.DrawerLayout.DrawerListener; |
| 25 | import android.view.MenuItem; |
| 26 | import android.view.View; |
| 27 | |
| 28 | /** |
| 29 | * A facade over the various pieces comprising "roots fragment in a Drawer". |
| 30 | * |
| 31 | * @see DrawerController#create(DrawerLayout) |
| 32 | */ |
| 33 | abstract class DrawerController implements DrawerListener { |
| 34 | |
| 35 | abstract void setOpen(boolean open); |
| 36 | abstract void lockOpen(); |
| 37 | abstract void lockClosed(); |
Steve McKay | 0fbfc65 | 2015-08-20 16:48:49 -0700 | [diff] [blame] | 38 | abstract boolean isPresent(); |
Steve McKay | 6bbed4d | 2015-08-17 13:18:05 -0700 | [diff] [blame] | 39 | abstract boolean isOpen(); |
| 40 | abstract boolean isUnlocked(); |
| 41 | abstract void syncState(); |
| 42 | abstract boolean onOptionsItemSelected(MenuItem item); |
| 43 | |
| 44 | /** |
| 45 | * Returns a controller suitable for {@code Layout}. |
| 46 | */ |
| 47 | static DrawerController create(Activity activity) { |
| 48 | |
| 49 | DrawerLayout layout = (DrawerLayout) activity.findViewById(R.id.drawer_layout); |
| 50 | |
| 51 | if (layout == null) { |
| 52 | return new DummyDrawerController(); |
| 53 | } |
| 54 | |
| 55 | View drawer = activity.findViewById(R.id.drawer_roots); |
| 56 | ActionBarDrawerToggle toggle = new ActionBarDrawerToggle( |
| 57 | activity, |
| 58 | layout, |
| 59 | R.drawable.ic_hamburger, |
| 60 | R.string.drawer_open, |
| 61 | R.string.drawer_close); |
| 62 | |
| 63 | return new RuntimeDrawerController(layout, drawer, toggle); |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Returns a controller suitable for {@code Layout}. |
| 68 | */ |
| 69 | static DrawerController createDummy() { |
| 70 | return new DummyDrawerController(); |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * Runtime controller that manages a real drawer. |
| 75 | */ |
| 76 | private static final class RuntimeDrawerController extends DrawerController { |
| 77 | |
| 78 | private final ActionBarDrawerToggle mToggle; |
| 79 | private DrawerLayout mLayout; |
| 80 | private View mDrawer; |
| 81 | |
| 82 | public RuntimeDrawerController( |
| 83 | DrawerLayout layout, View drawer, ActionBarDrawerToggle toggle) { |
| 84 | checkArgument(layout != null); |
| 85 | |
| 86 | mLayout = layout; |
| 87 | mDrawer = drawer; |
| 88 | mToggle = toggle; |
| 89 | |
| 90 | mLayout.setDrawerListener(this); |
| 91 | } |
| 92 | |
| 93 | @Override |
| 94 | void setOpen(boolean open) { |
| 95 | if (open) { |
| 96 | mLayout.openDrawer(mDrawer); |
| 97 | } else { |
| 98 | mLayout.closeDrawer(mDrawer); |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | @Override |
| 103 | boolean isOpen() { |
| 104 | return mLayout.isDrawerOpen(mDrawer); |
| 105 | } |
| 106 | |
| 107 | @Override |
Steve McKay | 0fbfc65 | 2015-08-20 16:48:49 -0700 | [diff] [blame] | 108 | boolean isPresent() { |
| 109 | return true; |
| 110 | } |
| 111 | |
| 112 | @Override |
Steve McKay | 6bbed4d | 2015-08-17 13:18:05 -0700 | [diff] [blame] | 113 | void syncState() { |
| 114 | mToggle.syncState(); |
| 115 | } |
| 116 | |
| 117 | @Override |
| 118 | boolean isUnlocked() { |
| 119 | return mLayout.getDrawerLockMode(mDrawer) == DrawerLayout.LOCK_MODE_UNLOCKED; |
| 120 | } |
| 121 | |
| 122 | @Override |
| 123 | void lockOpen() { |
| 124 | mLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_OPEN); |
| 125 | } |
| 126 | |
| 127 | @Override |
| 128 | void lockClosed() { |
| 129 | mLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED); |
| 130 | } |
| 131 | |
| 132 | @Override |
| 133 | boolean onOptionsItemSelected(MenuItem item) { |
| 134 | return false; |
| 135 | } |
| 136 | |
| 137 | @Override |
| 138 | public void onDrawerSlide(View drawerView, float slideOffset) { |
| 139 | mToggle.onDrawerSlide(drawerView, slideOffset); |
| 140 | } |
| 141 | |
| 142 | @Override |
| 143 | public void onDrawerOpened(View drawerView) { |
| 144 | mToggle.onDrawerOpened(drawerView); |
| 145 | } |
| 146 | |
| 147 | @Override |
| 148 | public void onDrawerClosed(View drawerView) { |
| 149 | mToggle.onDrawerClosed(drawerView); |
| 150 | } |
| 151 | |
| 152 | @Override |
| 153 | public void onDrawerStateChanged(int newState) { |
| 154 | mToggle.onDrawerStateChanged(newState); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | /* |
| 159 | * Dummy controller useful with clients that don't host a real drawer. |
| 160 | */ |
| 161 | private static final class DummyDrawerController extends DrawerController { |
| 162 | |
| 163 | @Override |
Steve McKay | 0fbfc65 | 2015-08-20 16:48:49 -0700 | [diff] [blame] | 164 | void setOpen(boolean open) {} |
Steve McKay | 6bbed4d | 2015-08-17 13:18:05 -0700 | [diff] [blame] | 165 | |
| 166 | @Override |
| 167 | void syncState() {} |
| 168 | |
| 169 | @Override |
| 170 | void lockOpen() {} |
| 171 | |
| 172 | @Override |
| 173 | void lockClosed() {} |
| 174 | |
| 175 | @Override |
Steve McKay | 0fbfc65 | 2015-08-20 16:48:49 -0700 | [diff] [blame] | 176 | boolean isOpen() { |
| 177 | return false; |
| 178 | } |
| 179 | |
| 180 | @Override |
Steve McKay | 6bbed4d | 2015-08-17 13:18:05 -0700 | [diff] [blame] | 181 | boolean isUnlocked() { |
| 182 | return true; |
| 183 | } |
| 184 | |
| 185 | @Override |
Steve McKay | 0fbfc65 | 2015-08-20 16:48:49 -0700 | [diff] [blame] | 186 | boolean isPresent() { |
| 187 | return false; |
| 188 | } |
| 189 | |
| 190 | @Override |
Steve McKay | 6bbed4d | 2015-08-17 13:18:05 -0700 | [diff] [blame] | 191 | boolean onOptionsItemSelected(MenuItem item) { |
| 192 | return false; |
| 193 | } |
| 194 | |
| 195 | @Override |
| 196 | public void onDrawerSlide(View drawerView, float slideOffset) {} |
| 197 | |
| 198 | @Override |
| 199 | public void onDrawerOpened(View drawerView) {} |
| 200 | |
| 201 | @Override |
| 202 | public void onDrawerClosed(View drawerView) {} |
| 203 | |
| 204 | @Override |
| 205 | public void onDrawerStateChanged(int newState) {} |
Steve McKay | 6bbed4d | 2015-08-17 13:18:05 -0700 | [diff] [blame] | 206 | } |
| 207 | } |