NavigationMenuItemView.java revision 7b75d53b8e5584895595f801256a3d63bb68148a 
1/*
2 * Copyright (C) 2015 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 android.support.design.internal;
18
19import android.content.Context;
20import android.content.res.ColorStateList;
21import android.graphics.Color;
22import android.graphics.drawable.ColorDrawable;
23import android.graphics.drawable.Drawable;
24import android.graphics.drawable.StateListDrawable;
25import android.support.design.R;
26import android.support.v4.content.res.ResourcesCompat;
27import android.support.v4.graphics.drawable.DrawableCompat;
28import android.support.v4.view.AccessibilityDelegateCompat;
29import android.support.v4.view.ViewCompat;
30import android.support.v4.view.accessibility.AccessibilityEventCompat;
31import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat;
32import android.support.v4.widget.TextViewCompat;
33import android.support.v7.view.menu.MenuItemImpl;
34import android.support.v7.view.menu.MenuView;
35import android.util.AttributeSet;
36import android.util.TypedValue;
37import android.view.LayoutInflater;
38import android.view.View;
39import android.view.ViewStub;
40import android.widget.CheckedTextView;
41import android.widget.FrameLayout;
42
43/**
44 * @hide
45 */
46public class NavigationMenuItemView extends ForegroundLinearLayout implements MenuView.ItemView {
47
48    private static final int[] CHECKED_STATE_SET = {android.R.attr.state_checked};
49
50    private final int mIconSize;
51
52    private boolean mNeedsEmptyIcon;
53
54    private boolean mCheckable;
55
56    private final CheckedTextView mTextView;
57
58    private FrameLayout mActionArea;
59
60    private MenuItemImpl mItemData;
61
62    private ColorStateList mIconTintList;
63
64    private boolean mHasIconTintList;
65
66    private Drawable mEmptyDrawable;
67
68    private final AccessibilityDelegateCompat mAccessibilityDelegate
69            = new AccessibilityDelegateCompat() {
70
71        @Override
72        public void onInitializeAccessibilityNodeInfo(View host,
73                AccessibilityNodeInfoCompat info) {
74            super.onInitializeAccessibilityNodeInfo(host, info);
75            info.setCheckable(mCheckable);
76        }
77
78    };
79
80    public NavigationMenuItemView(Context context) {
81        this(context, null);
82    }
83
84    public NavigationMenuItemView(Context context, AttributeSet attrs) {
85        this(context, attrs, 0);
86    }
87
88    public NavigationMenuItemView(Context context, AttributeSet attrs, int defStyleAttr) {
89        super(context, attrs, defStyleAttr);
90        setOrientation(HORIZONTAL);
91        LayoutInflater.from(context).inflate(R.layout.design_navigation_menu_item, this, true);
92        mIconSize = context.getResources().getDimensionPixelSize(
93                R.dimen.design_navigation_icon_size);
94        mTextView = (CheckedTextView) findViewById(R.id.design_menu_item_text);
95        mTextView.setDuplicateParentStateEnabled(true);
96        ViewCompat.setAccessibilityDelegate(mTextView, mAccessibilityDelegate);
97    }
98
99    @Override
100    public void initialize(MenuItemImpl itemData, int menuType) {
101        mItemData = itemData;
102
103        setVisibility(itemData.isVisible() ? VISIBLE : GONE);
104
105        if (getBackground() == null) {
106            setBackgroundDrawable(createDefaultBackground());
107        }
108
109        setCheckable(itemData.isCheckable());
110        setChecked(itemData.isChecked());
111        setEnabled(itemData.isEnabled());
112        setTitle(itemData.getTitle());
113        setIcon(itemData.getIcon());
114        setActionView(itemData.getActionView());
115        adjustAppearance();
116    }
117
118    private boolean shouldExpandActionArea() {
119        return mItemData.getTitle() == null &&
120                mItemData.getIcon() == null &&
121                mItemData.getActionView() != null;
122    }
123
124    private void adjustAppearance() {
125        if (shouldExpandActionArea()) {
126            // Expand the actionView area
127            mTextView.setVisibility(View.GONE);
128            if (mActionArea != null) {
129                LayoutParams params = (LayoutParams) mActionArea.getLayoutParams();
130                params.width = LayoutParams.MATCH_PARENT;
131                mActionArea.setLayoutParams(params);
132            }
133        } else {
134            mTextView.setVisibility(View.VISIBLE);
135            if (mActionArea != null) {
136                LayoutParams params = (LayoutParams) mActionArea.getLayoutParams();
137                params.width = LayoutParams.WRAP_CONTENT;
138                mActionArea.setLayoutParams(params);
139            }
140        }
141    }
142
143    public void recycle() {
144        if (mActionArea != null) {
145            mActionArea.removeAllViews();
146        }
147        mTextView.setCompoundDrawables(null, null, null, null);
148    }
149
150    private void setActionView(View actionView) {
151        if (actionView != null) {
152            if (mActionArea == null) {
153                mActionArea = (FrameLayout) ((ViewStub) findViewById(
154                        R.id.design_menu_item_action_area_stub)).inflate();
155            }
156            mActionArea.removeAllViews();
157            mActionArea.addView(actionView);
158        }
159    }
160
161    private StateListDrawable createDefaultBackground() {
162        TypedValue value = new TypedValue();
163        if (getContext().getTheme().resolveAttribute(
164                android.support.v7.appcompat.R.attr.colorControlHighlight, value, true)) {
165            StateListDrawable drawable = new StateListDrawable();
166            drawable.addState(CHECKED_STATE_SET, new ColorDrawable(value.data));
167            drawable.addState(EMPTY_STATE_SET, new ColorDrawable(Color.TRANSPARENT));
168            return drawable;
169        }
170        return null;
171    }
172
173    @Override
174    public MenuItemImpl getItemData() {
175        return mItemData;
176    }
177
178    @Override
179    public void setTitle(CharSequence title) {
180        mTextView.setText(title);
181    }
182
183    @Override
184    public void setCheckable(boolean checkable) {
185        refreshDrawableState();
186        if (mCheckable != checkable) {
187            mCheckable = checkable;
188            mAccessibilityDelegate.sendAccessibilityEvent(mTextView,
189                    AccessibilityEventCompat.TYPE_WINDOW_CONTENT_CHANGED);
190        }
191    }
192
193    @Override
194    public void setChecked(boolean checked) {
195        refreshDrawableState();
196        mTextView.setChecked(checked);
197    }
198
199    @Override
200    public void setShortcut(boolean showShortcut, char shortcutKey) {
201    }
202
203    @Override
204    public void setIcon(Drawable icon) {
205        if (icon != null) {
206            if (mHasIconTintList) {
207                Drawable.ConstantState state = icon.getConstantState();
208                icon = DrawableCompat.wrap(state == null ? icon : state.newDrawable()).mutate();
209                DrawableCompat.setTintList(icon, mIconTintList);
210            }
211            icon.setBounds(0, 0, mIconSize, mIconSize);
212        } else if (mNeedsEmptyIcon) {
213            if (mEmptyDrawable == null) {
214                mEmptyDrawable = ResourcesCompat.getDrawable(getResources(),
215                        R.drawable.navigation_empty_icon, getContext().getTheme());
216                if (mEmptyDrawable != null) {
217                    mEmptyDrawable.setBounds(0, 0, mIconSize, mIconSize);
218                }
219            }
220            icon = mEmptyDrawable;
221        }
222        TextViewCompat.setCompoundDrawablesRelative(mTextView, icon, null, null, null);
223    }
224
225    @Override
226    public boolean prefersCondensedTitle() {
227        return false;
228    }
229
230    @Override
231    public boolean showsIcon() {
232        return true;
233    }
234
235    @Override
236    protected int[] onCreateDrawableState(int extraSpace) {
237        final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
238        if (mItemData != null && mItemData.isCheckable() && mItemData.isChecked()) {
239            mergeDrawableStates(drawableState, CHECKED_STATE_SET);
240        }
241        return drawableState;
242    }
243
244    void setIconTintList(ColorStateList tintList) {
245        mIconTintList = tintList;
246        mHasIconTintList = mIconTintList != null;
247        if (mItemData != null) {
248            // Update the icon so that the tint takes effect
249            setIcon(mItemData.getIcon());
250        }
251    }
252
253    public void setTextAppearance(int textAppearance) {
254        TextViewCompat.setTextAppearance(mTextView, textAppearance);
255    }
256
257    public void setTextColor(ColorStateList colors) {
258        mTextView.setTextColor(colors);
259    }
260
261    public void setNeedsEmptyIcon(boolean needsEmptyIcon) {
262        mNeedsEmptyIcon = needsEmptyIcon;
263    }
264
265}
266