ExpandedMenuView.java revision 54b6cfa9a9e5b861a9930af873580d6dc20f773c 
1/*
2 * Copyright (C) 2006 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
17package com.android.internal.view.menu;
18
19
20import android.content.Context;
21import android.content.res.TypedArray;
22import android.util.AttributeSet;
23import android.view.View;
24import android.widget.AdapterView;
25import android.widget.BaseAdapter;
26import android.widget.ListAdapter;
27import android.widget.ListView;
28import android.widget.AdapterView.OnItemClickListener;
29
30import com.android.internal.view.menu.MenuBuilder.ItemInvoker;
31
32/**
33 * The expanded menu view is a list-like menu with all of the available menu items.  It is opened
34 * by the user clicking no the 'More' button on the icon menu view.
35 */
36public final class ExpandedMenuView extends ListView implements ItemInvoker, MenuView, OnItemClickListener {
37    private MenuBuilder mMenu;
38
39    /** Default animations for this menu */
40    private int mAnimations;
41
42    /**
43     * Instantiates the ExpandedMenuView that is linked with the provided MenuBuilder.
44     * @param menu The model for the menu which this MenuView will display
45     */
46    public ExpandedMenuView(Context context, AttributeSet attrs) {
47        super(context, attrs);
48
49        TypedArray a = context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.MenuView, 0, 0);
50        mAnimations = a.getResourceId(com.android.internal.R.styleable.MenuView_windowAnimationStyle, 0);
51        a.recycle();
52
53        setOnItemClickListener(this);
54    }
55
56    public void initialize(MenuBuilder menu, int menuType) {
57        mMenu = menu;
58
59        setAdapter(menu.new MenuAdapter(menuType));
60    }
61
62    public void updateChildren(boolean cleared) {
63        ListAdapter adapter = getAdapter();
64        // Tell adapter of the change, it will notify the mListView
65        if (adapter != null) {
66            if (cleared) {
67                ((BaseAdapter)adapter).notifyDataSetInvalidated();
68            }
69            else {
70                ((BaseAdapter)adapter).notifyDataSetChanged();
71            }
72        }
73    }
74
75    @Override
76    protected void onDetachedFromWindow() {
77        super.onDetachedFromWindow();
78
79        // Clear the cached bitmaps of children
80        setChildrenDrawingCacheEnabled(false);
81    }
82
83    public boolean invokeItem(MenuItemImpl item) {
84        return mMenu.performItemAction(item, 0);
85    }
86
87    public void onItemClick(AdapterView parent, View v, int position, long id) {
88        invokeItem((MenuItemImpl) getAdapter().getItem(position));
89    }
90
91    public int getWindowAnimations() {
92        return mAnimations;
93    }
94
95}
96