Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 com.android.internal.view.menu; |
| 18 | |
| 19 | import com.android.internal.view.menu.ActionMenuView.ActionMenuChildView; |
| 20 | |
| 21 | import android.content.Context; |
| 22 | import android.content.res.Configuration; |
| 23 | import android.content.res.Resources; |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 24 | import android.util.SparseBooleanArray; |
| 25 | import android.view.MenuItem; |
| 26 | import android.view.SoundEffectConstants; |
| 27 | import android.view.View; |
| 28 | import android.view.View.MeasureSpec; |
| 29 | import android.view.ViewGroup; |
| 30 | import android.widget.ImageButton; |
| 31 | |
| 32 | import java.util.ArrayList; |
| 33 | |
| 34 | /** |
| 35 | * MenuPresenter for building action menus as seen in the action bar and action modes. |
| 36 | */ |
| 37 | public class ActionMenuPresenter extends BaseMenuPresenter { |
Adam Powell | 640a66e | 2011-04-29 10:18:53 -0700 | [diff] [blame] | 38 | private static final String TAG = "ActionMenuPresenter"; |
| 39 | |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 40 | private View mOverflowButton; |
| 41 | private boolean mReserveOverflow; |
| 42 | private int mWidthLimit; |
| 43 | private int mActionItemWidthLimit; |
| 44 | private int mMaxItems; |
Adam Powell | 640a66e | 2011-04-29 10:18:53 -0700 | [diff] [blame] | 45 | private boolean mStrictWidthLimit; |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 46 | |
| 47 | // Group IDs that have been added as actions - used temporarily, allocated here for reuse. |
| 48 | private final SparseBooleanArray mActionButtonGroups = new SparseBooleanArray(); |
| 49 | |
| 50 | private View mScrapActionButtonView; |
| 51 | |
| 52 | private OverflowPopup mOverflowPopup; |
| 53 | private ActionButtonSubmenu mActionButtonPopup; |
| 54 | |
| 55 | private OpenOverflowRunnable mPostedOpenRunnable; |
| 56 | |
| 57 | public ActionMenuPresenter() { |
| 58 | super(com.android.internal.R.layout.action_menu_layout, |
| 59 | com.android.internal.R.layout.action_menu_item_layout); |
| 60 | } |
| 61 | |
| 62 | @Override |
| 63 | public void initForMenu(Context context, MenuBuilder menu) { |
| 64 | super.initForMenu(context, menu); |
| 65 | |
| 66 | final Resources res = context.getResources(); |
| 67 | final int screen = res.getConfiguration().screenLayout; |
| 68 | // TODO Use the no-buttons specifier instead here |
| 69 | mReserveOverflow = (screen & Configuration.SCREENLAYOUT_SIZE_MASK) == |
| 70 | Configuration.SCREENLAYOUT_SIZE_XLARGE; |
| 71 | mWidthLimit = res.getDisplayMetrics().widthPixels / 2; |
| 72 | |
| 73 | // Measure for initial configuration |
| 74 | mMaxItems = res.getInteger(com.android.internal.R.integer.max_action_buttons); |
| 75 | |
| 76 | int width = mWidthLimit; |
| 77 | if (mReserveOverflow) { |
Adam Powell | 9b4bee0 | 2011-04-27 19:24:47 -0700 | [diff] [blame] | 78 | if (mOverflowButton == null) { |
| 79 | mOverflowButton = new OverflowMenuButton(mContext); |
| 80 | final int spec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); |
| 81 | mOverflowButton.measure(spec, spec); |
| 82 | } |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 83 | width -= mOverflowButton.getMeasuredWidth(); |
| 84 | } else { |
| 85 | mOverflowButton = null; |
| 86 | } |
| 87 | |
| 88 | mActionItemWidthLimit = width; |
| 89 | |
| 90 | // Drop a scrap view as it may no longer reflect the proper context/config. |
| 91 | mScrapActionButtonView = null; |
| 92 | } |
| 93 | |
Adam Powell | 640a66e | 2011-04-29 10:18:53 -0700 | [diff] [blame] | 94 | public void setWidthLimit(int width, boolean strict) { |
Adam Powell | 9b4bee0 | 2011-04-27 19:24:47 -0700 | [diff] [blame] | 95 | if (mReserveOverflow) { |
| 96 | width -= mOverflowButton.getMeasuredWidth(); |
| 97 | } |
| 98 | mActionItemWidthLimit = width; |
Adam Powell | 640a66e | 2011-04-29 10:18:53 -0700 | [diff] [blame] | 99 | mStrictWidthLimit = strict; |
Adam Powell | 9b4bee0 | 2011-04-27 19:24:47 -0700 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | public void setItemLimit(int itemCount) { |
| 103 | mMaxItems = itemCount; |
| 104 | } |
| 105 | |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 106 | @Override |
| 107 | public MenuView getMenuView(ViewGroup root) { |
| 108 | MenuView result = super.getMenuView(root); |
| 109 | ((ActionMenuView) result).setPresenter(this); |
| 110 | return result; |
| 111 | } |
| 112 | |
| 113 | @Override |
| 114 | public View getItemView(MenuItemImpl item, View convertView, ViewGroup parent) { |
| 115 | final View actionView = item.getActionView(); |
| 116 | return actionView != null ? actionView : super.getItemView(item, convertView, parent); |
| 117 | } |
| 118 | |
| 119 | @Override |
| 120 | public void bindItemView(MenuItemImpl item, MenuView.ItemView itemView) { |
| 121 | itemView.initialize(item, 0); |
| 122 | ((ActionMenuItemView) itemView).setItemInvoker((ActionMenuView) mMenuView); |
| 123 | } |
| 124 | |
| 125 | @Override |
| 126 | public boolean shouldIncludeItem(int childIndex, MenuItemImpl item) { |
| 127 | return item.isActionButton(); |
| 128 | } |
| 129 | |
| 130 | @Override |
| 131 | public void updateMenuView(boolean cleared) { |
| 132 | super.updateMenuView(cleared); |
| 133 | |
| 134 | if (mReserveOverflow && mMenu.getNonActionItems().size() > 0) { |
| 135 | if (mOverflowButton == null) { |
| 136 | mOverflowButton = new OverflowMenuButton(mContext); |
Adam Powell | 640a66e | 2011-04-29 10:18:53 -0700 | [diff] [blame] | 137 | mOverflowButton.setLayoutParams( |
| 138 | ((ActionMenuView) mMenuView).generateOverflowButtonLayoutParams()); |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 139 | } |
| 140 | ViewGroup parent = (ViewGroup) mOverflowButton.getParent(); |
| 141 | if (parent != mMenuView) { |
| 142 | if (parent != null) { |
| 143 | parent.removeView(mOverflowButton); |
| 144 | } |
| 145 | ((ViewGroup) mMenuView).addView(mOverflowButton); |
| 146 | } |
| 147 | } else if (mOverflowButton != null && mOverflowButton.getParent() == mMenuView) { |
| 148 | ((ViewGroup) mMenuView).removeView(mOverflowButton); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | @Override |
| 153 | public boolean filterLeftoverView(ViewGroup parent, int childIndex) { |
| 154 | if (parent.getChildAt(childIndex) == mOverflowButton) return false; |
| 155 | return super.filterLeftoverView(parent, childIndex); |
| 156 | } |
| 157 | |
| 158 | public boolean onSubMenuSelected(SubMenuBuilder subMenu) { |
| 159 | if (!subMenu.hasVisibleItems()) return false; |
| 160 | |
| 161 | SubMenuBuilder topSubMenu = subMenu; |
| 162 | while (topSubMenu.getParentMenu() != mMenu) { |
| 163 | topSubMenu = (SubMenuBuilder) topSubMenu.getParentMenu(); |
| 164 | } |
| 165 | View anchor = findViewForItem(topSubMenu.getItem()); |
| 166 | if (anchor == null) return false; |
| 167 | |
| 168 | mActionButtonPopup = new ActionButtonSubmenu(mContext, subMenu); |
| 169 | mActionButtonPopup.setAnchorView(anchor); |
| 170 | mActionButtonPopup.show(); |
| 171 | super.onSubMenuSelected(subMenu); |
| 172 | return true; |
| 173 | } |
| 174 | |
| 175 | private View findViewForItem(MenuItem item) { |
| 176 | final ViewGroup parent = (ViewGroup) mMenuView; |
| 177 | if (parent == null) return null; |
| 178 | |
| 179 | final int count = parent.getChildCount(); |
| 180 | for (int i = 0; i < count; i++) { |
| 181 | final View child = parent.getChildAt(i); |
| 182 | if (child instanceof MenuView.ItemView && |
| 183 | ((MenuView.ItemView) child).getItemData() == item) { |
| 184 | return child; |
| 185 | } |
| 186 | } |
| 187 | return null; |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * Display the overflow menu if one is present. |
| 192 | * @return true if the overflow menu was shown, false otherwise. |
| 193 | */ |
| 194 | public boolean showOverflowMenu() { |
| 195 | if (mReserveOverflow && !isOverflowMenuShowing() && mMenuView != null && |
| 196 | mPostedOpenRunnable == null) { |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 197 | OverflowPopup popup = new OverflowPopup(mContext, mMenu, mOverflowButton, true); |
| 198 | mPostedOpenRunnable = new OpenOverflowRunnable(popup); |
| 199 | // Post this for later; we might still need a layout for the anchor to be right. |
| 200 | ((View) mMenuView).post(mPostedOpenRunnable); |
| 201 | |
| 202 | // ActionMenuPresenter uses null as a callback argument here |
| 203 | // to indicate overflow is opening. |
| 204 | super.onSubMenuSelected(null); |
| 205 | |
| 206 | return true; |
| 207 | } |
| 208 | return false; |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * Hide the overflow menu if it is currently showing. |
| 213 | * |
| 214 | * @return true if the overflow menu was hidden, false otherwise. |
| 215 | */ |
| 216 | public boolean hideOverflowMenu() { |
| 217 | if (mPostedOpenRunnable != null && mMenuView != null) { |
| 218 | ((View) mMenuView).removeCallbacks(mPostedOpenRunnable); |
| 219 | return true; |
| 220 | } |
| 221 | |
| 222 | MenuPopupHelper popup = mOverflowPopup; |
| 223 | if (popup != null) { |
| 224 | popup.dismiss(); |
| 225 | return true; |
| 226 | } |
| 227 | return false; |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Dismiss all popup menus - overflow and submenus. |
| 232 | * @return true if popups were dismissed, false otherwise. (This can be because none were open.) |
| 233 | */ |
| 234 | public boolean dismissPopupMenus() { |
| 235 | boolean result = hideOverflowMenu(); |
| 236 | result |= hideSubMenus(); |
| 237 | return result; |
| 238 | } |
| 239 | |
| 240 | /** |
| 241 | * Dismiss all submenu popups. |
| 242 | * |
| 243 | * @return true if popups were dismissed, false otherwise. (This can be because none were open.) |
| 244 | */ |
| 245 | public boolean hideSubMenus() { |
| 246 | if (mActionButtonPopup != null) { |
| 247 | mActionButtonPopup.dismiss(); |
| 248 | return true; |
| 249 | } |
| 250 | return false; |
| 251 | } |
| 252 | |
| 253 | /** |
| 254 | * @return true if the overflow menu is currently showing |
| 255 | */ |
| 256 | public boolean isOverflowMenuShowing() { |
| 257 | return mOverflowPopup != null && mOverflowPopup.isShowing(); |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * @return true if space has been reserved in the action menu for an overflow item. |
| 262 | */ |
| 263 | public boolean isOverflowReserved() { |
| 264 | return mReserveOverflow; |
| 265 | } |
| 266 | |
| 267 | public boolean flagActionItems() { |
| 268 | final ArrayList<MenuItemImpl> visibleItems = mMenu.getVisibleItems(); |
| 269 | final int itemsSize = visibleItems.size(); |
| 270 | int maxActions = mMaxItems; |
| 271 | int widthLimit = mActionItemWidthLimit; |
| 272 | final int querySpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); |
| 273 | final ViewGroup parent = (ViewGroup) mMenuView; |
| 274 | |
| 275 | int requiredItems = 0; |
| 276 | int requestedItems = 0; |
| 277 | int firstActionWidth = 0; |
| 278 | boolean hasOverflow = false; |
| 279 | for (int i = 0; i < itemsSize; i++) { |
| 280 | MenuItemImpl item = visibleItems.get(i); |
| 281 | if (item.requiresActionButton()) { |
| 282 | requiredItems++; |
| 283 | } else if (item.requestsActionButton()) { |
| 284 | requestedItems++; |
| 285 | } else { |
| 286 | hasOverflow = true; |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | // Reserve a spot for the overflow item if needed. |
| 291 | if (mReserveOverflow && |
| 292 | (hasOverflow || requiredItems + requestedItems > maxActions)) { |
| 293 | maxActions--; |
| 294 | } |
| 295 | maxActions -= requiredItems; |
| 296 | |
| 297 | final SparseBooleanArray seenGroups = mActionButtonGroups; |
| 298 | seenGroups.clear(); |
| 299 | |
| 300 | // Flag as many more requested items as will fit. |
| 301 | for (int i = 0; i < itemsSize; i++) { |
| 302 | MenuItemImpl item = visibleItems.get(i); |
| 303 | |
| 304 | if (item.requiresActionButton()) { |
| 305 | View v = item.getActionView(); |
| 306 | if (v == null) { |
| 307 | v = getItemView(item, mScrapActionButtonView, parent); |
| 308 | if (mScrapActionButtonView == null) { |
| 309 | mScrapActionButtonView = v; |
| 310 | } |
| 311 | } |
| 312 | v.measure(querySpec, querySpec); |
| 313 | final int measuredWidth = v.getMeasuredWidth(); |
| 314 | widthLimit -= measuredWidth; |
| 315 | if (firstActionWidth == 0) { |
| 316 | firstActionWidth = measuredWidth; |
| 317 | } |
| 318 | final int groupId = item.getGroupId(); |
| 319 | if (groupId != 0) { |
| 320 | seenGroups.put(groupId, true); |
| 321 | } |
| 322 | } else if (item.requestsActionButton()) { |
| 323 | // Items in a group with other items that already have an action slot |
| 324 | // can break the max actions rule, but not the width limit. |
| 325 | final int groupId = item.getGroupId(); |
| 326 | final boolean inGroup = seenGroups.get(groupId); |
| 327 | boolean isAction = (maxActions > 0 || inGroup) && widthLimit > 0; |
| 328 | maxActions--; |
| 329 | |
| 330 | if (isAction) { |
| 331 | View v = item.getActionView(); |
| 332 | if (v == null) { |
| 333 | v = getItemView(item, mScrapActionButtonView, parent); |
| 334 | if (mScrapActionButtonView == null) { |
| 335 | mScrapActionButtonView = v; |
| 336 | } |
| 337 | } |
| 338 | v.measure(querySpec, querySpec); |
| 339 | final int measuredWidth = v.getMeasuredWidth(); |
| 340 | widthLimit -= measuredWidth; |
| 341 | if (firstActionWidth == 0) { |
| 342 | firstActionWidth = measuredWidth; |
| 343 | } |
| 344 | |
Adam Powell | 640a66e | 2011-04-29 10:18:53 -0700 | [diff] [blame] | 345 | if (mStrictWidthLimit) { |
| 346 | isAction = widthLimit >= 0; |
Adam Powell | 640a66e | 2011-04-29 10:18:53 -0700 | [diff] [blame] | 347 | } else { |
| 348 | // Did this push the entire first item past the limit? |
| 349 | isAction = widthLimit + firstActionWidth > 0; |
Adam Powell | 696cba5 | 2011-03-29 10:38:16 -0700 | [diff] [blame] | 350 | } |
| 351 | } |
| 352 | |
| 353 | if (isAction && groupId != 0) { |
| 354 | seenGroups.put(groupId, true); |
| 355 | } else if (inGroup) { |
| 356 | // We broke the width limit. Demote the whole group, they all overflow now. |
| 357 | seenGroups.put(groupId, false); |
| 358 | for (int j = 0; j < i; j++) { |
| 359 | MenuItemImpl areYouMyGroupie = visibleItems.get(j); |
| 360 | if (areYouMyGroupie.getGroupId() == groupId) { |
| 361 | areYouMyGroupie.setIsActionButton(false); |
| 362 | } |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | item.setIsActionButton(isAction); |
| 367 | } |
| 368 | } |
| 369 | return true; |
| 370 | } |
| 371 | |
| 372 | @Override |
| 373 | public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) { |
| 374 | dismissPopupMenus(); |
| 375 | super.onCloseMenu(menu, allMenusAreClosing); |
| 376 | } |
| 377 | |
| 378 | private class OverflowMenuButton extends ImageButton implements ActionMenuChildView { |
| 379 | public OverflowMenuButton(Context context) { |
| 380 | super(context, null, com.android.internal.R.attr.actionOverflowButtonStyle); |
| 381 | |
| 382 | setClickable(true); |
| 383 | setFocusable(true); |
| 384 | setVisibility(VISIBLE); |
| 385 | setEnabled(true); |
| 386 | } |
| 387 | |
| 388 | @Override |
| 389 | public boolean performClick() { |
| 390 | if (super.performClick()) { |
| 391 | return true; |
| 392 | } |
| 393 | |
| 394 | playSoundEffect(SoundEffectConstants.CLICK); |
| 395 | showOverflowMenu(); |
| 396 | return true; |
| 397 | } |
| 398 | |
| 399 | public boolean needsDividerBefore() { |
| 400 | return true; |
| 401 | } |
| 402 | |
| 403 | public boolean needsDividerAfter() { |
| 404 | return false; |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | private class OverflowPopup extends MenuPopupHelper { |
| 409 | public OverflowPopup(Context context, MenuBuilder menu, View anchorView, |
| 410 | boolean overflowOnly) { |
| 411 | super(context, menu, anchorView, overflowOnly); |
| 412 | } |
| 413 | |
| 414 | @Override |
| 415 | public void onDismiss() { |
| 416 | super.onDismiss(); |
| 417 | mMenu.close(); |
| 418 | mOverflowPopup = null; |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | private class ActionButtonSubmenu extends MenuPopupHelper { |
| 423 | private SubMenuBuilder mSubMenu; |
| 424 | |
| 425 | public ActionButtonSubmenu(Context context, SubMenuBuilder subMenu) { |
| 426 | super(context, subMenu); |
| 427 | mSubMenu = subMenu; |
| 428 | |
| 429 | MenuItemImpl item = (MenuItemImpl) subMenu.getItem(); |
| 430 | if (!item.isActionButton()) { |
| 431 | // Give a reasonable anchor to nested submenus. |
| 432 | setAnchorView(mOverflowButton == null ? (View) mMenuView : mOverflowButton); |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | @Override |
| 437 | public void onDismiss() { |
| 438 | super.onDismiss(); |
| 439 | mSubMenu.close(); |
| 440 | mActionButtonPopup = null; |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | private class OpenOverflowRunnable implements Runnable { |
| 445 | private OverflowPopup mPopup; |
| 446 | |
| 447 | public OpenOverflowRunnable(OverflowPopup popup) { |
| 448 | mPopup = popup; |
| 449 | } |
| 450 | |
| 451 | public void run() { |
| 452 | mMenu.changeMenuMode(); |
| 453 | if (mPopup.tryShow()) { |
| 454 | mOverflowPopup = mPopup; |
| 455 | mPostedOpenRunnable = null; |
| 456 | } |
| 457 | } |
| 458 | } |
| 459 | } |