Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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.internal.view.menu; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.os.Bundle; |
| 21 | import android.os.Parcelable; |
| 22 | import android.util.SparseArray; |
| 23 | import android.view.ContextThemeWrapper; |
| 24 | import android.view.LayoutInflater; |
| 25 | import android.view.View; |
| 26 | import android.view.ViewGroup; |
| 27 | import android.widget.AdapterView; |
| 28 | import android.widget.BaseAdapter; |
| 29 | import android.widget.ListAdapter; |
| 30 | |
| 31 | import java.util.ArrayList; |
| 32 | |
| 33 | /** |
| 34 | * MenuPresenter for list-style menus. |
| 35 | */ |
| 36 | public class ListMenuPresenter implements MenuPresenter, AdapterView.OnItemClickListener { |
| 37 | Context mContext; |
| 38 | LayoutInflater mInflater; |
| 39 | MenuBuilder mMenu; |
| 40 | |
| 41 | ExpandedMenuView mMenuView; |
| 42 | |
| 43 | private int mItemIndexOffset; |
| 44 | int mThemeRes; |
| 45 | int mItemLayoutRes; |
| 46 | |
| 47 | private Callback mCallback; |
| 48 | private MenuAdapter mAdapter; |
| 49 | |
| 50 | public static final String VIEWS_TAG = "android:menu:list"; |
| 51 | |
| 52 | /** |
| 53 | * Construct a new ListMenuPresenter. |
| 54 | * @param context Context to use for theming. This will supersede the context provided |
| 55 | * to initForMenu when this presenter is added. |
| 56 | * @param itemLayoutRes Layout resource for individual item views. |
| 57 | */ |
| 58 | public ListMenuPresenter(Context context, int itemLayoutRes) { |
| 59 | this(itemLayoutRes, 0); |
| 60 | mContext = context; |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Construct a new ListMenuPresenter. |
| 65 | * @param itemLayoutRes Layout resource for individual item views. |
| 66 | * @param themeRes Resource ID of a theme to use for views. |
| 67 | */ |
| 68 | public ListMenuPresenter(int itemLayoutRes, int themeRes) { |
| 69 | mItemLayoutRes = itemLayoutRes; |
| 70 | mThemeRes = themeRes; |
| 71 | } |
| 72 | |
| 73 | @Override |
| 74 | public void initForMenu(Context context, MenuBuilder menu) { |
| 75 | if (mThemeRes != 0) { |
| 76 | mContext = new ContextThemeWrapper(context, mThemeRes); |
| 77 | } else if (mContext == null) { |
| 78 | mContext = context; |
| 79 | } |
| 80 | mInflater = LayoutInflater.from(mContext); |
| 81 | mMenu = menu; |
| 82 | } |
| 83 | |
| 84 | @Override |
| 85 | public MenuView getMenuView(ViewGroup root) { |
| 86 | if (mMenuView == null) { |
| 87 | mMenuView = (ExpandedMenuView) mInflater.inflate( |
| 88 | com.android.internal.R.layout.expanded_menu_layout, root, false); |
| 89 | if (mAdapter == null) { |
| 90 | mAdapter = new MenuAdapter(); |
| 91 | } |
| 92 | mMenuView.setAdapter(mAdapter); |
| 93 | mMenuView.setOnItemClickListener(this); |
| 94 | } |
| 95 | return mMenuView; |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * Call this instead of getMenuView if you want to manage your own ListView. |
| 100 | * For proper operation, the ListView hosting this adapter should add |
| 101 | * this presenter as an OnItemClickListener. |
| 102 | * |
| 103 | * @return A ListAdapter containing the items in the menu. |
| 104 | */ |
| 105 | public ListAdapter getAdapter() { |
| 106 | if (mAdapter == null) { |
| 107 | mAdapter = new MenuAdapter(); |
| 108 | } |
| 109 | return mAdapter; |
| 110 | } |
| 111 | |
| 112 | @Override |
| 113 | public void updateMenuView(boolean cleared) { |
| 114 | if (mAdapter != null) mAdapter.notifyDataSetChanged(); |
| 115 | } |
| 116 | |
| 117 | @Override |
| 118 | public void setCallback(Callback cb) { |
| 119 | mCallback = cb; |
| 120 | } |
| 121 | |
| 122 | @Override |
| 123 | public boolean onSubMenuSelected(SubMenuBuilder subMenu) { |
| 124 | if (!subMenu.hasVisibleItems()) return false; |
| 125 | |
| 126 | // The window manager will give us a token. |
| 127 | new MenuDialogHelper(subMenu).show(null); |
| 128 | if (mCallback != null) { |
| 129 | mCallback.onOpenSubMenu(subMenu); |
| 130 | } |
| 131 | return true; |
| 132 | } |
| 133 | |
| 134 | @Override |
| 135 | public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) { |
| 136 | if (mCallback != null) { |
| 137 | mCallback.onCloseMenu(menu, allMenusAreClosing); |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | int getItemIndexOffset() { |
| 142 | return mItemIndexOffset; |
| 143 | } |
| 144 | |
| 145 | public void setItemIndexOffset(int offset) { |
| 146 | mItemIndexOffset = offset; |
| 147 | if (mMenuView != null) { |
| 148 | updateMenuView(false); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | @Override |
| 153 | public void onItemClick(AdapterView<?> parent, View view, int position, long id) { |
| 154 | mMenu.performItemAction(mAdapter.getItem(position), 0); |
| 155 | } |
| 156 | |
| 157 | @Override |
| 158 | public boolean flagActionItems() { |
| 159 | return false; |
| 160 | } |
| 161 | |
| 162 | public void saveHierarchyState(Bundle outState) { |
| 163 | SparseArray<Parcelable> viewStates = new SparseArray<Parcelable>(); |
| 164 | if (mMenuView != null) { |
| 165 | ((View) mMenuView).saveHierarchyState(viewStates); |
| 166 | } |
| 167 | outState.putSparseParcelableArray(VIEWS_TAG, viewStates); |
| 168 | } |
| 169 | |
| 170 | public void restoreHierarchyState(Bundle inState) { |
| 171 | SparseArray<Parcelable> viewStates = inState.getSparseParcelableArray(VIEWS_TAG); |
| 172 | ((View) mMenuView).restoreHierarchyState(viewStates); |
| 173 | } |
| 174 | |
| 175 | private class MenuAdapter extends BaseAdapter { |
| 176 | public int getCount() { |
| 177 | ArrayList<MenuItemImpl> items = mMenu.getVisibleItems(); |
| 178 | return items.size() - mItemIndexOffset; |
| 179 | } |
| 180 | |
| 181 | public MenuItemImpl getItem(int position) { |
| 182 | ArrayList<MenuItemImpl> items = mMenu.getVisibleItems(); |
| 183 | return items.get(position + mItemIndexOffset); |
| 184 | } |
| 185 | |
| 186 | public long getItemId(int position) { |
| 187 | // Since a menu item's ID is optional, we'll use the position as an |
| 188 | // ID for the item in the AdapterView |
| 189 | return position; |
| 190 | } |
| 191 | |
| 192 | public View getView(int position, View convertView, ViewGroup parent) { |
| 193 | if (convertView == null) { |
| 194 | convertView = mInflater.inflate(mItemLayoutRes, parent, false); |
| 195 | } |
| 196 | |
| 197 | MenuView.ItemView itemView = (MenuView.ItemView) convertView; |
| 198 | itemView.initialize(getItem(position), 0); |
| 199 | return convertView; |
| 200 | } |
| 201 | } |
| 202 | } |