ListMenuItemView.java revision d24b8183b93e781080b2c16c487e60d51c12da31 
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
19import android.content.Context;
20import android.content.res.TypedArray;
21import android.graphics.drawable.Drawable;
22import android.util.AttributeSet;
23import android.view.LayoutInflater;
24import android.view.View;
25import android.widget.CheckBox;
26import android.widget.CompoundButton;
27import android.widget.ImageView;
28import android.widget.LinearLayout;
29import android.widget.RadioButton;
30import android.widget.TextView;
31
32/**
33 * The item view for each item in the ListView-based MenuViews.
34 */
35public class ListMenuItemView extends LinearLayout implements MenuView.ItemView {
36    private MenuItemImpl mItemData;
37
38    private ImageView mIconView;
39    private RadioButton mRadioButton;
40    private TextView mTitleView;
41    private CheckBox mCheckBox;
42    private TextView mShortcutView;
43
44    private Drawable mBackground;
45    private int mTextAppearance;
46    private Context mTextAppearanceContext;
47
48    private int mMenuType;
49
50    public ListMenuItemView(Context context, AttributeSet attrs, int defStyle) {
51        super(context, attrs);
52
53        TypedArray a =
54            context.obtainStyledAttributes(
55                attrs, com.android.internal.R.styleable.MenuView, defStyle, 0);
56
57        mBackground = a.getDrawable(com.android.internal.R.styleable.MenuView_itemBackground);
58        mTextAppearance = a.getResourceId(com.android.internal.R.styleable.
59                                          MenuView_itemTextAppearance, -1);
60        mTextAppearanceContext = context;
61
62        a.recycle();
63    }
64
65    public ListMenuItemView(Context context, AttributeSet attrs) {
66        this(context, attrs, 0);
67    }
68
69    @Override
70    protected void onFinishInflate() {
71        super.onFinishInflate();
72
73        setBackgroundDrawable(mBackground);
74
75        mTitleView = (TextView) findViewById(com.android.internal.R.id.title);
76        if (mTextAppearance != -1) {
77            mTitleView.setTextAppearance(mTextAppearanceContext,
78                                         mTextAppearance);
79        }
80
81        mShortcutView = (TextView) findViewById(com.android.internal.R.id.shortcut);
82    }
83
84    public void initialize(MenuItemImpl itemData, int menuType) {
85        mItemData = itemData;
86        mMenuType = menuType;
87
88        setVisibility(itemData.isVisible() ? View.VISIBLE : View.GONE);
89
90        setTitle(itemData.getTitleForItemView(this));
91        setCheckable(itemData.isCheckable());
92        setShortcut(itemData.shouldShowShortcut(), itemData.getShortcut());
93        setIcon(itemData.getIcon());
94        setEnabled(itemData.isEnabled());
95    }
96
97    public void setTitle(CharSequence title) {
98        if (title != null) {
99            mTitleView.setText(title);
100
101            if (mTitleView.getVisibility() != VISIBLE) mTitleView.setVisibility(VISIBLE);
102        } else {
103            if (mTitleView.getVisibility() != GONE) mTitleView.setVisibility(GONE);
104        }
105    }
106
107    public MenuItemImpl getItemData() {
108        return mItemData;
109    }
110
111    public void setCheckable(boolean checkable) {
112
113        if (!checkable && mRadioButton == null && mCheckBox == null) {
114            return;
115        }
116
117        if (mRadioButton == null) {
118            insertRadioButton();
119        }
120        if (mCheckBox == null) {
121            insertCheckBox();
122        }
123
124        // Depending on whether its exclusive check or not, the checkbox or
125        // radio button will be the one in use (and the other will be otherCompoundButton)
126        final CompoundButton compoundButton;
127        final CompoundButton otherCompoundButton;
128
129        if (mItemData.isExclusiveCheckable()) {
130            compoundButton = mRadioButton;
131            otherCompoundButton = mCheckBox;
132        } else {
133            compoundButton = mCheckBox;
134            otherCompoundButton = mRadioButton;
135        }
136
137        if (checkable) {
138            compoundButton.setChecked(mItemData.isChecked());
139
140            final int newVisibility = checkable ? VISIBLE : GONE;
141            if (compoundButton.getVisibility() != newVisibility) {
142                compoundButton.setVisibility(newVisibility);
143            }
144
145            // Make sure the other compound button isn't visible
146            if (otherCompoundButton.getVisibility() != GONE) {
147                otherCompoundButton.setVisibility(GONE);
148            }
149        } else {
150            mCheckBox.setVisibility(GONE);
151            mRadioButton.setVisibility(GONE);
152        }
153    }
154
155    public void setChecked(boolean checked) {
156        CompoundButton compoundButton;
157
158        if (mItemData.isExclusiveCheckable()) {
159            if (mRadioButton == null) {
160                insertRadioButton();
161            }
162            compoundButton = mRadioButton;
163        } else {
164            if (mCheckBox == null) {
165                insertCheckBox();
166            }
167            compoundButton = mCheckBox;
168        }
169
170        compoundButton.setChecked(checked);
171    }
172
173    public void setShortcut(boolean showShortcut, char shortcutKey) {
174        final int newVisibility = (showShortcut && mItemData.shouldShowShortcut())
175                ? VISIBLE : GONE;
176
177        if (newVisibility == VISIBLE) {
178            mShortcutView.setText(mItemData.getShortcutLabel());
179        }
180
181        if (mShortcutView.getVisibility() != newVisibility) {
182            mShortcutView.setVisibility(newVisibility);
183        }
184    }
185
186    public void setIcon(Drawable icon) {
187
188        if (!mItemData.shouldShowIcon(mMenuType)) {
189            return;
190        }
191
192        if (mIconView == null && icon == null) {
193            return;
194        }
195
196        if (mIconView == null) {
197            insertIconView();
198        }
199
200        if (icon != null) {
201            mIconView.setImageDrawable(icon);
202
203            if (mIconView.getVisibility() != VISIBLE) {
204                mIconView.setVisibility(VISIBLE);
205            }
206        } else {
207            mIconView.setVisibility(GONE);
208        }
209    }
210
211    private void insertIconView() {
212        LayoutInflater inflater = mItemData.getLayoutInflater(mMenuType);
213        mIconView = (ImageView) inflater.inflate(com.android.internal.R.layout.list_menu_item_icon,
214                this, false);
215        addView(mIconView, 0);
216    }
217
218    private void insertRadioButton() {
219        LayoutInflater inflater = mItemData.getLayoutInflater(mMenuType);
220        mRadioButton =
221                (RadioButton) inflater.inflate(com.android.internal.R.layout.list_menu_item_radio,
222                this, false);
223        addView(mRadioButton);
224    }
225
226    private void insertCheckBox() {
227        LayoutInflater inflater = mItemData.getLayoutInflater(mMenuType);
228        mCheckBox =
229                (CheckBox) inflater.inflate(com.android.internal.R.layout.list_menu_item_checkbox,
230                this, false);
231        addView(mCheckBox);
232    }
233
234    public boolean prefersCondensedTitle() {
235        return false;
236    }
237
238    public boolean showsIcon() {
239        return false;
240    }
241
242}
243