| /* |
| * Copyright (C) 2015 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 static com.android.internal.util.Preconditions.checkArgument; |
| |
| import android.app.Activity; |
| import android.support.v4.app.ActionBarDrawerToggle; |
| import android.support.v4.widget.DrawerLayout; |
| import android.support.v4.widget.DrawerLayout.DrawerListener; |
| import android.view.MenuItem; |
| import android.view.View; |
| |
| /** |
| * A facade over the various pieces comprising "roots fragment in a Drawer". |
| * |
| * @see DrawerController#create(DrawerLayout) |
| */ |
| abstract class DrawerController implements DrawerListener { |
| |
| abstract void setOpen(boolean open); |
| abstract void lockOpen(); |
| abstract void lockClosed(); |
| abstract boolean isPresent(); |
| abstract boolean isOpen(); |
| abstract boolean isUnlocked(); |
| abstract void syncState(); |
| abstract boolean onOptionsItemSelected(MenuItem item); |
| |
| /** |
| * Returns a controller suitable for {@code Layout}. |
| */ |
| static DrawerController create(Activity activity) { |
| |
| DrawerLayout layout = (DrawerLayout) activity.findViewById(R.id.drawer_layout); |
| |
| if (layout == null) { |
| return new DummyDrawerController(); |
| } |
| |
| View drawer = activity.findViewById(R.id.drawer_roots); |
| ActionBarDrawerToggle toggle = new ActionBarDrawerToggle( |
| activity, |
| layout, |
| R.drawable.ic_hamburger, |
| R.string.drawer_open, |
| R.string.drawer_close); |
| |
| return new RuntimeDrawerController(layout, drawer, toggle); |
| } |
| |
| /** |
| * Returns a controller suitable for {@code Layout}. |
| */ |
| static DrawerController createDummy() { |
| return new DummyDrawerController(); |
| } |
| |
| /** |
| * Runtime controller that manages a real drawer. |
| */ |
| private static final class RuntimeDrawerController extends DrawerController { |
| |
| private final ActionBarDrawerToggle mToggle; |
| private DrawerLayout mLayout; |
| private View mDrawer; |
| |
| public RuntimeDrawerController( |
| DrawerLayout layout, View drawer, ActionBarDrawerToggle toggle) { |
| checkArgument(layout != null); |
| |
| mLayout = layout; |
| mDrawer = drawer; |
| mToggle = toggle; |
| |
| mLayout.setDrawerListener(this); |
| } |
| |
| @Override |
| void setOpen(boolean open) { |
| if (open) { |
| mLayout.openDrawer(mDrawer); |
| } else { |
| mLayout.closeDrawer(mDrawer); |
| } |
| } |
| |
| @Override |
| boolean isOpen() { |
| return mLayout.isDrawerOpen(mDrawer); |
| } |
| |
| @Override |
| boolean isPresent() { |
| return true; |
| } |
| |
| @Override |
| void syncState() { |
| mToggle.syncState(); |
| } |
| |
| @Override |
| boolean isUnlocked() { |
| return mLayout.getDrawerLockMode(mDrawer) == DrawerLayout.LOCK_MODE_UNLOCKED; |
| } |
| |
| @Override |
| void lockOpen() { |
| mLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_OPEN); |
| } |
| |
| @Override |
| void lockClosed() { |
| mLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED); |
| } |
| |
| @Override |
| boolean onOptionsItemSelected(MenuItem item) { |
| return false; |
| } |
| |
| @Override |
| public void onDrawerSlide(View drawerView, float slideOffset) { |
| mToggle.onDrawerSlide(drawerView, slideOffset); |
| } |
| |
| @Override |
| public void onDrawerOpened(View drawerView) { |
| mToggle.onDrawerOpened(drawerView); |
| } |
| |
| @Override |
| public void onDrawerClosed(View drawerView) { |
| mToggle.onDrawerClosed(drawerView); |
| } |
| |
| @Override |
| public void onDrawerStateChanged(int newState) { |
| mToggle.onDrawerStateChanged(newState); |
| } |
| } |
| |
| /* |
| * Dummy controller useful with clients that don't host a real drawer. |
| */ |
| private static final class DummyDrawerController extends DrawerController { |
| |
| @Override |
| void setOpen(boolean open) {} |
| |
| @Override |
| void syncState() {} |
| |
| @Override |
| void lockOpen() {} |
| |
| @Override |
| void lockClosed() {} |
| |
| @Override |
| boolean isOpen() { |
| return false; |
| } |
| |
| @Override |
| boolean isUnlocked() { |
| return true; |
| } |
| |
| @Override |
| boolean isPresent() { |
| return false; |
| } |
| |
| @Override |
| boolean onOptionsItemSelected(MenuItem item) { |
| return false; |
| } |
| |
| @Override |
| public void onDrawerSlide(View drawerView, float slideOffset) {} |
| |
| @Override |
| public void onDrawerOpened(View drawerView) {} |
| |
| @Override |
| public void onDrawerClosed(View drawerView) {} |
| |
| @Override |
| public void onDrawerStateChanged(int newState) {} |
| } |
| } |