| /* |
| * Copyright (C) 2011 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.internal.view.menu; |
| |
| import android.content.Context; |
| import android.os.Bundle; |
| import android.os.Parcelable; |
| import android.util.SparseArray; |
| import android.view.ContextThemeWrapper; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.AdapterView; |
| import android.widget.BaseAdapter; |
| import android.widget.ListAdapter; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * MenuPresenter for list-style menus. |
| */ |
| public class ListMenuPresenter implements MenuPresenter, AdapterView.OnItemClickListener { |
| Context mContext; |
| LayoutInflater mInflater; |
| MenuBuilder mMenu; |
| |
| ExpandedMenuView mMenuView; |
| |
| private int mItemIndexOffset; |
| int mThemeRes; |
| int mItemLayoutRes; |
| |
| private Callback mCallback; |
| private MenuAdapter mAdapter; |
| |
| public static final String VIEWS_TAG = "android:menu:list"; |
| |
| /** |
| * Construct a new ListMenuPresenter. |
| * @param context Context to use for theming. This will supersede the context provided |
| * to initForMenu when this presenter is added. |
| * @param itemLayoutRes Layout resource for individual item views. |
| */ |
| public ListMenuPresenter(Context context, int itemLayoutRes) { |
| this(itemLayoutRes, 0); |
| mContext = context; |
| } |
| |
| /** |
| * Construct a new ListMenuPresenter. |
| * @param itemLayoutRes Layout resource for individual item views. |
| * @param themeRes Resource ID of a theme to use for views. |
| */ |
| public ListMenuPresenter(int itemLayoutRes, int themeRes) { |
| mItemLayoutRes = itemLayoutRes; |
| mThemeRes = themeRes; |
| } |
| |
| @Override |
| public void initForMenu(Context context, MenuBuilder menu) { |
| if (mThemeRes != 0) { |
| mContext = new ContextThemeWrapper(context, mThemeRes); |
| } else if (mContext == null) { |
| mContext = context; |
| } |
| mInflater = LayoutInflater.from(mContext); |
| mMenu = menu; |
| } |
| |
| @Override |
| public MenuView getMenuView(ViewGroup root) { |
| if (mMenuView == null) { |
| mMenuView = (ExpandedMenuView) mInflater.inflate( |
| com.android.internal.R.layout.expanded_menu_layout, root, false); |
| if (mAdapter == null) { |
| mAdapter = new MenuAdapter(); |
| } |
| mMenuView.setAdapter(mAdapter); |
| mMenuView.setOnItemClickListener(this); |
| } |
| return mMenuView; |
| } |
| |
| /** |
| * Call this instead of getMenuView if you want to manage your own ListView. |
| * For proper operation, the ListView hosting this adapter should add |
| * this presenter as an OnItemClickListener. |
| * |
| * @return A ListAdapter containing the items in the menu. |
| */ |
| public ListAdapter getAdapter() { |
| if (mAdapter == null) { |
| mAdapter = new MenuAdapter(); |
| } |
| return mAdapter; |
| } |
| |
| @Override |
| public void updateMenuView(boolean cleared) { |
| if (mAdapter != null) mAdapter.notifyDataSetChanged(); |
| } |
| |
| @Override |
| public void setCallback(Callback cb) { |
| mCallback = cb; |
| } |
| |
| @Override |
| public boolean onSubMenuSelected(SubMenuBuilder subMenu) { |
| if (!subMenu.hasVisibleItems()) return false; |
| |
| // The window manager will give us a token. |
| new MenuDialogHelper(subMenu).show(null); |
| if (mCallback != null) { |
| mCallback.onOpenSubMenu(subMenu); |
| } |
| return true; |
| } |
| |
| @Override |
| public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) { |
| if (mCallback != null) { |
| mCallback.onCloseMenu(menu, allMenusAreClosing); |
| } |
| } |
| |
| int getItemIndexOffset() { |
| return mItemIndexOffset; |
| } |
| |
| public void setItemIndexOffset(int offset) { |
| mItemIndexOffset = offset; |
| if (mMenuView != null) { |
| updateMenuView(false); |
| } |
| } |
| |
| @Override |
| public void onItemClick(AdapterView<?> parent, View view, int position, long id) { |
| mMenu.performItemAction(mAdapter.getItem(position), 0); |
| } |
| |
| @Override |
| public boolean flagActionItems() { |
| return false; |
| } |
| |
| public boolean expandItemActionView(MenuBuilder menu, MenuItemImpl item) { |
| return false; |
| } |
| |
| public boolean collapseItemActionView(MenuBuilder menu, MenuItemImpl item) { |
| return false; |
| } |
| |
| public void saveHierarchyState(Bundle outState) { |
| SparseArray<Parcelable> viewStates = new SparseArray<Parcelable>(); |
| if (mMenuView != null) { |
| ((View) mMenuView).saveHierarchyState(viewStates); |
| } |
| outState.putSparseParcelableArray(VIEWS_TAG, viewStates); |
| } |
| |
| public void restoreHierarchyState(Bundle inState) { |
| SparseArray<Parcelable> viewStates = inState.getSparseParcelableArray(VIEWS_TAG); |
| ((View) mMenuView).restoreHierarchyState(viewStates); |
| } |
| |
| private class MenuAdapter extends BaseAdapter { |
| public int getCount() { |
| ArrayList<MenuItemImpl> items = mMenu.getVisibleItems(); |
| return items.size() - mItemIndexOffset; |
| } |
| |
| public MenuItemImpl getItem(int position) { |
| ArrayList<MenuItemImpl> items = mMenu.getVisibleItems(); |
| return items.get(position + mItemIndexOffset); |
| } |
| |
| public long getItemId(int position) { |
| // Since a menu item's ID is optional, we'll use the position as an |
| // ID for the item in the AdapterView |
| return position; |
| } |
| |
| public View getView(int position, View convertView, ViewGroup parent) { |
| if (convertView == null) { |
| convertView = mInflater.inflate(mItemLayoutRes, parent, false); |
| } |
| |
| MenuView.ItemView itemView = (MenuView.ItemView) convertView; |
| itemView.initialize(getItem(position), 0); |
| return convertView; |
| } |
| } |
| } |