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 17 package android.support.design.internal; 18 19 import android.content.Context; 20 import android.content.res.ColorStateList; 21 import android.graphics.Color; 22 import android.graphics.drawable.ColorDrawable; 23 import android.graphics.drawable.Drawable; 24 import android.graphics.drawable.StateListDrawable; 25 import android.support.design.R; 26 import android.support.v4.content.res.ResourcesCompat; 27 import android.support.v4.graphics.drawable.DrawableCompat; 28 import android.support.v4.view.AccessibilityDelegateCompat; 29 import android.support.v4.view.ViewCompat; 30 import android.support.v4.view.accessibility.AccessibilityEventCompat; 31 import android.support.v4.view.accessibility.AccessibilityNodeInfoCompat; 32 import android.support.v4.widget.TextViewCompat; 33 import android.support.v7.view.menu.MenuItemImpl; 34 import android.support.v7.view.menu.MenuView; 35 import android.util.AttributeSet; 36 import android.util.TypedValue; 37 import android.view.LayoutInflater; 38 import android.view.View; 39 import android.view.ViewStub; 40 import android.widget.CheckedTextView; 41 import android.widget.FrameLayout; 42 43 /** 44 * @hide 45 */ 46 public 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 NavigationMenuItemView(Context context)80 public NavigationMenuItemView(Context context) { 81 this(context, null); 82 } 83 NavigationMenuItemView(Context context, AttributeSet attrs)84 public NavigationMenuItemView(Context context, AttributeSet attrs) { 85 this(context, attrs, 0); 86 } 87 NavigationMenuItemView(Context context, AttributeSet attrs, int defStyleAttr)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 initialize(MenuItemImpl itemData, int menuType)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 shouldExpandActionArea()118 private boolean shouldExpandActionArea() { 119 return mItemData.getTitle() == null && 120 mItemData.getIcon() == null && 121 mItemData.getActionView() != null; 122 } 123 adjustAppearance()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 recycle()143 public void recycle() { 144 if (mActionArea != null) { 145 mActionArea.removeAllViews(); 146 } 147 mTextView.setCompoundDrawables(null, null, null, null); 148 } 149 setActionView(View actionView)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 createDefaultBackground()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 getItemData()174 public MenuItemImpl getItemData() { 175 return mItemData; 176 } 177 178 @Override setTitle(CharSequence title)179 public void setTitle(CharSequence title) { 180 mTextView.setText(title); 181 } 182 183 @Override setCheckable(boolean checkable)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 setChecked(boolean checked)194 public void setChecked(boolean checked) { 195 refreshDrawableState(); 196 mTextView.setChecked(checked); 197 } 198 199 @Override setShortcut(boolean showShortcut, char shortcutKey)200 public void setShortcut(boolean showShortcut, char shortcutKey) { 201 } 202 203 @Override setIcon(Drawable icon)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 prefersCondensedTitle()226 public boolean prefersCondensedTitle() { 227 return false; 228 } 229 230 @Override showsIcon()231 public boolean showsIcon() { 232 return true; 233 } 234 235 @Override onCreateDrawableState(int extraSpace)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 setIconTintList(ColorStateList tintList)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 setTextAppearance(Context context, int textAppearance)253 public void setTextAppearance(Context context, int textAppearance) { 254 mTextView.setTextAppearance(context, textAppearance); 255 } 256 setTextColor(ColorStateList colors)257 public void setTextColor(ColorStateList colors) { 258 mTextView.setTextColor(colors); 259 } 260 setNeedsEmptyIcon(boolean needsEmptyIcon)261 public void setNeedsEmptyIcon(boolean needsEmptyIcon) { 262 mNeedsEmptyIcon = needsEmptyIcon; 263 } 264 265 } 266