NavigationMenuPresenter.java revision 1a542ba7235ec038f7ec1ac0ed65f35d29f5c952
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.content.res.Resources; 22import android.graphics.drawable.ColorDrawable; 23import android.graphics.drawable.Drawable; 24import android.os.Bundle; 25import android.os.Parcelable; 26import android.support.annotation.LayoutRes; 27import android.support.annotation.NonNull; 28import android.support.annotation.Nullable; 29import android.support.annotation.StyleRes; 30import android.support.design.R; 31import android.support.v7.internal.view.menu.MenuBuilder; 32import android.support.v7.internal.view.menu.MenuItemImpl; 33import android.support.v7.internal.view.menu.MenuPresenter; 34import android.support.v7.internal.view.menu.MenuView; 35import android.support.v7.internal.view.menu.SubMenuBuilder; 36import android.util.SparseArray; 37import android.view.LayoutInflater; 38import android.view.MenuItem; 39import android.view.SubMenu; 40import android.view.View; 41import android.view.ViewGroup; 42import android.widget.AdapterView; 43import android.widget.BaseAdapter; 44import android.widget.LinearLayout; 45import android.widget.TextView; 46 47import java.util.ArrayList; 48 49/** 50 * @hide 51 */ 52public class NavigationMenuPresenter implements MenuPresenter, AdapterView.OnItemClickListener { 53 54 private static final String STATE_HIERARCHY = "android:menu:list"; 55 private static final String STATE_ADAPTER = "android:menu:adapter"; 56 57 private NavigationMenuView mMenuView; 58 private LinearLayout mHeader; 59 60 private Callback mCallback; 61 private MenuBuilder mMenu; 62 private int mId; 63 64 private NavigationMenuAdapter mAdapter; 65 private LayoutInflater mLayoutInflater; 66 67 private int mTextAppearance; 68 private boolean mTextAppearanceSet; 69 private ColorStateList mTextColor; 70 private ColorStateList mIconTintList; 71 private Drawable mItemBackground; 72 73 /** 74 * Padding to be inserted at the top of the list to avoid the first menu item 75 * from being placed underneath the status bar. 76 */ 77 private int mPaddingTopDefault; 78 79 /** 80 * Padding for separators between items 81 */ 82 private int mPaddingSeparator; 83 84 @Override 85 public void initForMenu(Context context, MenuBuilder menu) { 86 mLayoutInflater = LayoutInflater.from(context); 87 mMenu = menu; 88 Resources res = context.getResources(); 89 mPaddingTopDefault = res.getDimensionPixelOffset(R.dimen.navigation_padding_top_default); 90 mPaddingSeparator = res.getDimensionPixelOffset( 91 R.dimen.navigation_separator_vertical_padding); 92 } 93 94 @Override 95 public MenuView getMenuView(ViewGroup root) { 96 if (mMenuView == null) { 97 mMenuView = (NavigationMenuView) mLayoutInflater.inflate( 98 R.layout.design_navigation_menu, root, false); 99 if (mAdapter == null) { 100 mAdapter = new NavigationMenuAdapter(); 101 } 102 mHeader = (LinearLayout) mLayoutInflater.inflate(R.layout.design_navigation_item_header, 103 mMenuView, false); 104 mMenuView.addHeaderView(mHeader); 105 mMenuView.setAdapter(mAdapter); 106 mMenuView.setOnItemClickListener(this); 107 } 108 return mMenuView; 109 } 110 111 @Override 112 public void updateMenuView(boolean cleared) { 113 if (mAdapter != null) { 114 mAdapter.notifyDataSetChanged(); 115 } 116 } 117 118 @Override 119 public void setCallback(Callback cb) { 120 mCallback = cb; 121 } 122 123 @Override 124 public boolean onSubMenuSelected(SubMenuBuilder subMenu) { 125 return false; 126 } 127 128 @Override 129 public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) { 130 if (mCallback != null) { 131 mCallback.onCloseMenu(menu, allMenusAreClosing); 132 } 133 } 134 135 @Override 136 public boolean flagActionItems() { 137 return false; 138 } 139 140 @Override 141 public boolean expandItemActionView(MenuBuilder menu, MenuItemImpl item) { 142 return false; 143 } 144 145 @Override 146 public boolean collapseItemActionView(MenuBuilder menu, MenuItemImpl item) { 147 return false; 148 } 149 150 @Override 151 public int getId() { 152 return mId; 153 } 154 155 public void setId(int id) { 156 mId = id; 157 } 158 159 @Override 160 public Parcelable onSaveInstanceState() { 161 Bundle state = new Bundle(); 162 if (mMenuView != null) { 163 SparseArray<Parcelable> hierarchy = new SparseArray<>(); 164 mMenuView.saveHierarchyState(hierarchy); 165 state.putSparseParcelableArray(STATE_HIERARCHY, hierarchy); 166 } 167 if (mAdapter != null) { 168 state.putBundle(STATE_ADAPTER, mAdapter.createInstanceState()); 169 } 170 return state; 171 } 172 173 @Override 174 public void onRestoreInstanceState(Parcelable parcelable) { 175 Bundle state = (Bundle) parcelable; 176 SparseArray<Parcelable> hierarchy = state.getSparseParcelableArray(STATE_HIERARCHY); 177 if (hierarchy != null) { 178 mMenuView.restoreHierarchyState(hierarchy); 179 } 180 Bundle adapterState = state.getBundle(STATE_ADAPTER); 181 if (adapterState != null) { 182 mAdapter.restoreInstanceState(adapterState); 183 } 184 } 185 186 @Override 187 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 188 int positionInAdapter = position - mMenuView.getHeaderViewsCount(); 189 if (positionInAdapter >= 0) { 190 setUpdateSuspended(true); 191 MenuItemImpl item = mAdapter.getItem(positionInAdapter).getMenuItem(); 192 if (item != null && item.isCheckable()) { 193 setCheckedItem(item); 194 } 195 mMenu.performItemAction(item, this, 0); 196 setUpdateSuspended(false); 197 updateMenuView(false); 198 } 199 } 200 201 public void setCheckedItem(MenuItemImpl item) { 202 mAdapter.setCheckedItem(item); 203 } 204 205 public View inflateHeaderView(@LayoutRes int res) { 206 View view = mLayoutInflater.inflate(res, mHeader, false); 207 addHeaderView(view); 208 return view; 209 } 210 211 public void addHeaderView(@NonNull View view) { 212 mHeader.addView(view); 213 // The padding on top should be cleared. 214 mMenuView.setPadding(0, 0, 0, mMenuView.getPaddingBottom()); 215 } 216 217 public void removeHeaderView(@NonNull View view) { 218 mHeader.removeView(view); 219 if (mHeader.getChildCount() == 0) { 220 mMenuView.setPadding(0, mPaddingTopDefault, 0, mMenuView.getPaddingBottom()); 221 } 222 } 223 224 @Nullable 225 public ColorStateList getItemTintList() { 226 return mIconTintList; 227 } 228 229 public void setItemIconTintList(@Nullable ColorStateList tint) { 230 mIconTintList = tint; 231 updateMenuView(false); 232 } 233 234 @Nullable 235 public ColorStateList getItemTextColor() { 236 return mTextColor; 237 } 238 239 public void setItemTextColor(@Nullable ColorStateList textColor) { 240 mTextColor = textColor; 241 updateMenuView(false); 242 } 243 244 public void setItemTextAppearance(@StyleRes int resId) { 245 mTextAppearance = resId; 246 mTextAppearanceSet = true; 247 updateMenuView(false); 248 } 249 250 public Drawable getItemBackground() { 251 return mItemBackground; 252 } 253 254 public void setItemBackground(Drawable itemBackground) { 255 mItemBackground = itemBackground; 256 } 257 258 public void setUpdateSuspended(boolean updateSuspended) { 259 if (mAdapter != null) { 260 mAdapter.setUpdateSuspended(updateSuspended); 261 } 262 } 263 264 private class NavigationMenuAdapter extends BaseAdapter { 265 266 private static final String STATE_CHECKED_ITEM = "android:menu:checked"; 267 268 private static final int VIEW_TYPE_NORMAL = 0; 269 private static final int VIEW_TYPE_SUBHEADER = 1; 270 private static final int VIEW_TYPE_SEPARATOR = 2; 271 272 private final ArrayList<NavigationMenuItem> mItems = new ArrayList<>(); 273 private MenuItemImpl mCheckedItem; 274 private ColorDrawable mTransparentIcon; 275 private boolean mUpdateSuspended; 276 277 NavigationMenuAdapter() { 278 prepareMenuItems(); 279 } 280 281 @Override 282 public int getCount() { 283 return mItems.size(); 284 } 285 286 @Override 287 public NavigationMenuItem getItem(int position) { 288 return mItems.get(position); 289 } 290 291 @Override 292 public long getItemId(int position) { 293 return position; 294 } 295 296 @Override 297 public int getViewTypeCount() { 298 return 3; 299 } 300 301 @Override 302 public int getItemViewType(int position) { 303 NavigationMenuItem item = getItem(position); 304 if (item.isSeparator()) { 305 return VIEW_TYPE_SEPARATOR; 306 } else if (item.getMenuItem().hasSubMenu()) { 307 return VIEW_TYPE_SUBHEADER; 308 } else { 309 return VIEW_TYPE_NORMAL; 310 } 311 } 312 313 @Override 314 public View getView(int position, View convertView, ViewGroup parent) { 315 NavigationMenuItem item = getItem(position); 316 int viewType = getItemViewType(position); 317 switch (viewType) { 318 case VIEW_TYPE_NORMAL: 319 if (convertView == null) { 320 convertView = mLayoutInflater.inflate(R.layout.design_navigation_item, 321 parent, false); 322 } 323 NavigationMenuItemView itemView = (NavigationMenuItemView) convertView; 324 itemView.setIconTintList(mIconTintList); 325 if (mTextAppearanceSet) { 326 itemView.setTextAppearance(itemView.getContext(), mTextAppearance); 327 } 328 if (mTextColor != null) { 329 itemView.setTextColor(mTextColor); 330 } 331 itemView.setBackgroundDrawable(mItemBackground != null ? 332 mItemBackground.getConstantState().newDrawable() : null); 333 itemView.initialize(item.getMenuItem(), 0); 334 break; 335 case VIEW_TYPE_SUBHEADER: 336 if (convertView == null) { 337 convertView = mLayoutInflater.inflate( 338 R.layout.design_navigation_item_subheader, parent, false); 339 } 340 TextView subHeader = (TextView) convertView; 341 subHeader.setText(item.getMenuItem().getTitle()); 342 break; 343 case VIEW_TYPE_SEPARATOR: 344 if (convertView == null) { 345 convertView = mLayoutInflater.inflate( 346 R.layout.design_navigation_item_separator, parent, false); 347 } 348 convertView.setPadding(0, item.getPaddingTop(), 0, 349 item.getPaddingBottom()); 350 break; 351 } 352 return convertView; 353 } 354 355 @Override 356 public boolean areAllItemsEnabled() { 357 return false; 358 } 359 360 @Override 361 public boolean isEnabled(int position) { 362 return getItem(position).isEnabled(); 363 } 364 365 @Override 366 public void notifyDataSetChanged() { 367 prepareMenuItems(); 368 super.notifyDataSetChanged(); 369 } 370 371 /** 372 * Flattens the visible menu items of {@link #mMenu} into {@link #mItems}, 373 * while inserting separators between items when necessary. 374 */ 375 private void prepareMenuItems() { 376 if (mUpdateSuspended) { 377 return; 378 } 379 mItems.clear(); 380 int currentGroupId = -1; 381 int currentGroupStart = 0; 382 boolean currentGroupHasIcon = false; 383 for (int i = 0, totalSize = mMenu.getVisibleItems().size(); i < totalSize; i++) { 384 MenuItemImpl item = mMenu.getVisibleItems().get(i); 385 if (item.isChecked()) { 386 setCheckedItem(item); 387 } 388 if (item.isCheckable()) { 389 item.setExclusiveCheckable(false); 390 } 391 if (item.hasSubMenu()) { 392 SubMenu subMenu = item.getSubMenu(); 393 if (subMenu.hasVisibleItems()) { 394 if (i != 0) { 395 mItems.add(NavigationMenuItem.separator(mPaddingSeparator, 0)); 396 } 397 mItems.add(NavigationMenuItem.of(item)); 398 boolean subMenuHasIcon = false; 399 int subMenuStart = mItems.size(); 400 for (int j = 0, size = subMenu.size(); j < size; j++) { 401 MenuItemImpl subMenuItem = (MenuItemImpl) subMenu.getItem(j); 402 if (subMenuItem.isVisible()) { 403 if (!subMenuHasIcon && subMenuItem.getIcon() != null) { 404 subMenuHasIcon = true; 405 } 406 if (subMenuItem.isCheckable()) { 407 subMenuItem.setExclusiveCheckable(false); 408 } 409 if (item.isChecked()) { 410 setCheckedItem(item); 411 } 412 mItems.add(NavigationMenuItem.of(subMenuItem)); 413 } 414 } 415 if (subMenuHasIcon) { 416 appendTransparentIconIfMissing(subMenuStart, mItems.size()); 417 } 418 } 419 } else { 420 int groupId = item.getGroupId(); 421 if (groupId != currentGroupId) { // first item in group 422 currentGroupStart = mItems.size(); 423 currentGroupHasIcon = item.getIcon() != null; 424 if (i != 0) { 425 currentGroupStart++; 426 mItems.add(NavigationMenuItem.separator( 427 mPaddingSeparator, mPaddingSeparator)); 428 } 429 } else if (!currentGroupHasIcon && item.getIcon() != null) { 430 currentGroupHasIcon = true; 431 appendTransparentIconIfMissing(currentGroupStart, mItems.size()); 432 } 433 if (currentGroupHasIcon && item.getIcon() == null) { 434 item.setIcon(android.R.color.transparent); 435 } 436 mItems.add(NavigationMenuItem.of(item)); 437 currentGroupId = groupId; 438 } 439 } 440 } 441 442 private void appendTransparentIconIfMissing(int startIndex, int endIndex) { 443 for (int i = startIndex; i < endIndex; i++) { 444 MenuItem item = mItems.get(i).getMenuItem(); 445 if (item.getIcon() == null) { 446 if (mTransparentIcon == null) { 447 mTransparentIcon = new ColorDrawable(android.R.color.transparent); 448 } 449 item.setIcon(mTransparentIcon); 450 } 451 } 452 } 453 454 public void setCheckedItem(MenuItemImpl checkedItem) { 455 if (mCheckedItem == checkedItem || !checkedItem.isCheckable()) { 456 return; 457 } 458 if (mCheckedItem != null) { 459 mCheckedItem.setChecked(false); 460 } 461 mCheckedItem = checkedItem; 462 checkedItem.setChecked(true); 463 } 464 465 public Bundle createInstanceState() { 466 Bundle state = new Bundle(); 467 if (mCheckedItem != null) { 468 state.putInt(STATE_CHECKED_ITEM, mCheckedItem.getItemId()); 469 } 470 return state; 471 } 472 473 public void restoreInstanceState(Bundle state) { 474 int checkedItem = state.getInt(STATE_CHECKED_ITEM, 0); 475 if (checkedItem != 0) { 476 mUpdateSuspended = true; 477 for (NavigationMenuItem item : mItems) { 478 MenuItemImpl menuItem = item.getMenuItem(); 479 if (menuItem != null && menuItem.getItemId() == checkedItem) { 480 setCheckedItem(menuItem); 481 break; 482 } 483 } 484 mUpdateSuspended = false; 485 prepareMenuItems(); 486 } 487 } 488 489 public void setUpdateSuspended(boolean updateSuspended) { 490 mUpdateSuspended = updateSuspended; 491 } 492 493 } 494 495 /** 496 * Wraps {@link MenuItemImpl}. This allows separators to be counted as items in list. 497 */ 498 private static class NavigationMenuItem { 499 500 /** The item; null for separators */ 501 private final MenuItemImpl mMenuItem; 502 503 /** Padding top; used only for separators */ 504 private final int mPaddingTop; 505 506 /** Padding bottom; used only for separators */ 507 private final int mPaddingBottom; 508 509 private NavigationMenuItem(MenuItemImpl item, int paddingTop, int paddingBottom) { 510 mMenuItem = item; 511 mPaddingTop = paddingTop; 512 mPaddingBottom = paddingBottom; 513 } 514 515 public static NavigationMenuItem of(MenuItemImpl item) { 516 return new NavigationMenuItem(item, 0, 0); 517 } 518 519 public static NavigationMenuItem separator(int paddingTop, int paddingBottom) { 520 return new NavigationMenuItem(null, paddingTop, paddingBottom); 521 } 522 523 public boolean isSeparator() { 524 return mMenuItem == null; 525 } 526 527 public int getPaddingTop() { 528 return mPaddingTop; 529 } 530 531 public int getPaddingBottom() { 532 return mPaddingBottom; 533 } 534 535 public MenuItemImpl getMenuItem() { 536 return mMenuItem; 537 } 538 539 public boolean isEnabled() { 540 // Separators and subheaders never respond to click 541 return mMenuItem != null && !mMenuItem.hasSubMenu() && mMenuItem.isEnabled(); 542 } 543 544 } 545 546} 547