1/* 2 * Copyright (C) 2014 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 */ 16package android.support.v7.widget; 17 18import android.content.Context; 19import android.content.res.Configuration; 20import android.os.Build; 21import android.support.v7.internal.view.menu.ActionMenuItemView; 22import android.support.v7.internal.view.menu.MenuBuilder; 23import android.support.v7.internal.view.menu.MenuItemImpl; 24import android.support.v7.internal.view.menu.MenuPresenter; 25import android.support.v7.internal.view.menu.MenuView; 26import android.support.v7.internal.widget.ViewUtils; 27import android.util.AttributeSet; 28import android.view.ContextThemeWrapper; 29import android.view.Gravity; 30import android.view.Menu; 31import android.view.MenuItem; 32import android.view.View; 33import android.view.ViewDebug; 34import android.view.ViewGroup; 35import android.view.accessibility.AccessibilityEvent; 36 37/** 38 * ActionMenuView is a presentation of a series of menu options as a View. It provides 39 * several top level options as action buttons while spilling remaining options over as 40 * items in an overflow menu. This allows applications to present packs of actions inline with 41 * specific or repeating content. 42 */ 43public class ActionMenuView extends LinearLayoutCompat implements MenuBuilder.ItemInvoker, 44 MenuView { 45 46 private static final String TAG = "ActionMenuView"; 47 48 static final int MIN_CELL_SIZE = 56; // dips 49 static final int GENERATED_ITEM_PADDING = 4; // dips 50 51 private MenuBuilder mMenu; 52 53 private Context mContext; 54 55 /** Context against which to inflate popup menus. */ 56 private Context mPopupContext; 57 58 /** Theme resource against which to inflate popup menus. */ 59 private int mPopupTheme; 60 61 private boolean mReserveOverflow; 62 private ActionMenuPresenter mPresenter; 63 private MenuPresenter.Callback mActionMenuPresenterCallback; 64 private MenuBuilder.Callback mMenuBuilderCallback; 65 private boolean mFormatItems; 66 private int mFormatItemsWidth; 67 private int mMinCellSize; 68 private int mGeneratedItemPadding; 69 70 private OnMenuItemClickListener mOnMenuItemClickListener; 71 72 public ActionMenuView(Context context) { 73 this(context, null); 74 } 75 76 public ActionMenuView(Context context, AttributeSet attrs) { 77 super(context, attrs); 78 mContext = context; 79 setBaselineAligned(false); 80 final float density = context.getResources().getDisplayMetrics().density; 81 mMinCellSize = (int) (MIN_CELL_SIZE * density); 82 mGeneratedItemPadding = (int) (GENERATED_ITEM_PADDING * density); 83 mPopupContext = context; 84 mPopupTheme = 0; 85 } 86 87 /** 88 * Specifies the theme to use when inflating popup menus. By default, uses 89 * the same theme as the action menu view itself. 90 * 91 * @param resId theme used to inflate popup menus 92 * @see #getPopupTheme() 93 */ 94 public void setPopupTheme(int resId) { 95 if (mPopupTheme != resId) { 96 mPopupTheme = resId; 97 if (resId == 0) { 98 mPopupContext = mContext; 99 } else { 100 mPopupContext = new ContextThemeWrapper(mContext, resId); 101 } 102 } 103 } 104 105 /** 106 * @return resource identifier of the theme used to inflate popup menus, or 107 * 0 if menus are inflated against the action menu view theme 108 * @see #setPopupTheme(int) 109 */ 110 public int getPopupTheme() { 111 return mPopupTheme; 112 } 113 114 /** 115 * @param presenter Menu presenter used to display popup menu 116 * @hide 117 */ 118 public void setPresenter(ActionMenuPresenter presenter) { 119 mPresenter = presenter; 120 mPresenter.setMenuView(this); 121 } 122 123 @Override 124 public void onConfigurationChanged(Configuration newConfig) { 125 if (Build.VERSION.SDK_INT >= 8) { 126 super.onConfigurationChanged(newConfig); 127 } 128 129 mPresenter.updateMenuView(false); 130 131 if (mPresenter != null && mPresenter.isOverflowMenuShowing()) { 132 mPresenter.hideOverflowMenu(); 133 mPresenter.showOverflowMenu(); 134 } 135 } 136 137 public void setOnMenuItemClickListener(OnMenuItemClickListener listener) { 138 mOnMenuItemClickListener = listener; 139 } 140 141 @Override 142 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 143 // If we've been given an exact size to match, apply special formatting during layout. 144 final boolean wasFormatted = mFormatItems; 145 mFormatItems = MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.EXACTLY; 146 147 if (wasFormatted != mFormatItems) { 148 mFormatItemsWidth = 0; // Reset this when switching modes 149 } 150 151 // Special formatting can change whether items can fit as action buttons. 152 // Kick the menu and update presenters when this changes. 153 final int widthSize = MeasureSpec.getSize(widthMeasureSpec); 154 if (mFormatItems && mMenu != null && widthSize != mFormatItemsWidth) { 155 mFormatItemsWidth = widthSize; 156 mMenu.onItemsChanged(true); 157 } 158 159 final int childCount = getChildCount(); 160 if (mFormatItems && childCount > 0) { 161 onMeasureExactFormat(widthMeasureSpec, heightMeasureSpec); 162 } else { 163 // Previous measurement at exact format may have set margins - reset them. 164 for (int i = 0; i < childCount; i++) { 165 final View child = getChildAt(i); 166 final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 167 lp.leftMargin = lp.rightMargin = 0; 168 } 169 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 170 } 171 } 172 173 private void onMeasureExactFormat(int widthMeasureSpec, int heightMeasureSpec) { 174 // We already know the width mode is EXACTLY if we're here. 175 final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 176 int widthSize = MeasureSpec.getSize(widthMeasureSpec); 177 int heightSize = MeasureSpec.getSize(heightMeasureSpec); 178 179 final int widthPadding = getPaddingLeft() + getPaddingRight(); 180 final int heightPadding = getPaddingTop() + getPaddingBottom(); 181 182 final int itemHeightSpec = getChildMeasureSpec(heightMeasureSpec, heightPadding, 183 ViewGroup.LayoutParams.WRAP_CONTENT); 184 185 widthSize -= widthPadding; 186 187 // Divide the view into cells. 188 final int cellCount = widthSize / mMinCellSize; 189 final int cellSizeRemaining = widthSize % mMinCellSize; 190 191 if (cellCount == 0) { 192 // Give up, nothing fits. 193 setMeasuredDimension(widthSize, 0); 194 return; 195 } 196 197 final int cellSize = mMinCellSize + cellSizeRemaining / cellCount; 198 199 int cellsRemaining = cellCount; 200 int maxChildHeight = 0; 201 int maxCellsUsed = 0; 202 int expandableItemCount = 0; 203 int visibleItemCount = 0; 204 boolean hasOverflow = false; 205 206 // This is used as a bitfield to locate the smallest items present. Assumes childCount < 64. 207 long smallestItemsAt = 0; 208 209 final int childCount = getChildCount(); 210 for (int i = 0; i < childCount; i++) { 211 final View child = getChildAt(i); 212 if (child.getVisibility() == GONE) continue; 213 214 final boolean isGeneratedItem = child instanceof ActionMenuItemView; 215 visibleItemCount++; 216 217 if (isGeneratedItem) { 218 // Reset padding for generated menu item views; it may change below 219 // and views are recycled. 220 child.setPadding(mGeneratedItemPadding, 0, mGeneratedItemPadding, 0); 221 } 222 223 final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 224 lp.expanded = false; 225 lp.extraPixels = 0; 226 lp.cellsUsed = 0; 227 lp.expandable = false; 228 lp.leftMargin = 0; 229 lp.rightMargin = 0; 230 lp.preventEdgeOffset = isGeneratedItem && ((ActionMenuItemView) child).hasText(); 231 232 // Overflow always gets 1 cell. No more, no less. 233 final int cellsAvailable = lp.isOverflowButton ? 1 : cellsRemaining; 234 235 final int cellsUsed = measureChildForCells(child, cellSize, cellsAvailable, 236 itemHeightSpec, heightPadding); 237 238 maxCellsUsed = Math.max(maxCellsUsed, cellsUsed); 239 if (lp.expandable) expandableItemCount++; 240 if (lp.isOverflowButton) hasOverflow = true; 241 242 cellsRemaining -= cellsUsed; 243 maxChildHeight = Math.max(maxChildHeight, child.getMeasuredHeight()); 244 if (cellsUsed == 1) smallestItemsAt |= (1 << i); 245 } 246 247 // When we have overflow and a single expanded (text) item, we want to try centering it 248 // visually in the available space even though overflow consumes some of it. 249 final boolean centerSingleExpandedItem = hasOverflow && visibleItemCount == 2; 250 251 // Divide space for remaining cells if we have items that can expand. 252 // Try distributing whole leftover cells to smaller items first. 253 254 boolean needsExpansion = false; 255 while (expandableItemCount > 0 && cellsRemaining > 0) { 256 int minCells = Integer.MAX_VALUE; 257 long minCellsAt = 0; // Bit locations are indices of relevant child views 258 int minCellsItemCount = 0; 259 for (int i = 0; i < childCount; i++) { 260 final View child = getChildAt(i); 261 final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 262 263 // Don't try to expand items that shouldn't. 264 if (!lp.expandable) continue; 265 266 // Mark indices of children that can receive an extra cell. 267 if (lp.cellsUsed < minCells) { 268 minCells = lp.cellsUsed; 269 minCellsAt = 1 << i; 270 minCellsItemCount = 1; 271 } else if (lp.cellsUsed == minCells) { 272 minCellsAt |= 1 << i; 273 minCellsItemCount++; 274 } 275 } 276 277 // Items that get expanded will always be in the set of smallest items when we're done. 278 smallestItemsAt |= minCellsAt; 279 280 if (minCellsItemCount > cellsRemaining) break; // Couldn't expand anything evenly. Stop. 281 282 // We have enough cells, all minimum size items will be incremented. 283 minCells++; 284 285 for (int i = 0; i < childCount; i++) { 286 final View child = getChildAt(i); 287 final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 288 if ((minCellsAt & (1 << i)) == 0) { 289 // If this item is already at our small item count, mark it for later. 290 if (lp.cellsUsed == minCells) smallestItemsAt |= 1 << i; 291 continue; 292 } 293 294 if (centerSingleExpandedItem && lp.preventEdgeOffset && cellsRemaining == 1) { 295 // Add padding to this item such that it centers. 296 child.setPadding(mGeneratedItemPadding + cellSize, 0, mGeneratedItemPadding, 0); 297 } 298 lp.cellsUsed++; 299 lp.expanded = true; 300 cellsRemaining--; 301 } 302 303 needsExpansion = true; 304 } 305 306 // Divide any space left that wouldn't divide along cell boundaries 307 // evenly among the smallest items 308 309 final boolean singleItem = !hasOverflow && visibleItemCount == 1; 310 if (cellsRemaining > 0 && smallestItemsAt != 0 && 311 (cellsRemaining < visibleItemCount - 1 || singleItem || maxCellsUsed > 1)) { 312 float expandCount = Long.bitCount(smallestItemsAt); 313 314 if (!singleItem) { 315 // The items at the far edges may only expand by half in order to pin to either side. 316 if ((smallestItemsAt & 1) != 0) { 317 LayoutParams lp = (LayoutParams) getChildAt(0).getLayoutParams(); 318 if (!lp.preventEdgeOffset) expandCount -= 0.5f; 319 } 320 if ((smallestItemsAt & (1 << (childCount - 1))) != 0) { 321 LayoutParams lp = ((LayoutParams) getChildAt(childCount - 1).getLayoutParams()); 322 if (!lp.preventEdgeOffset) expandCount -= 0.5f; 323 } 324 } 325 326 final int extraPixels = expandCount > 0 ? 327 (int) (cellsRemaining * cellSize / expandCount) : 0; 328 329 for (int i = 0; i < childCount; i++) { 330 if ((smallestItemsAt & (1 << i)) == 0) continue; 331 332 final View child = getChildAt(i); 333 final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 334 if (child instanceof ActionMenuItemView) { 335 // If this is one of our views, expand and measure at the larger size. 336 lp.extraPixels = extraPixels; 337 lp.expanded = true; 338 if (i == 0 && !lp.preventEdgeOffset) { 339 // First item gets part of its new padding pushed out of sight. 340 // The last item will get this implicitly from layout. 341 lp.leftMargin = -extraPixels / 2; 342 } 343 needsExpansion = true; 344 } else if (lp.isOverflowButton) { 345 lp.extraPixels = extraPixels; 346 lp.expanded = true; 347 lp.rightMargin = -extraPixels / 2; 348 needsExpansion = true; 349 } else { 350 // If we don't know what it is, give it some margins instead 351 // and let it center within its space. We still want to pin 352 // against the edges. 353 if (i != 0) { 354 lp.leftMargin = extraPixels / 2; 355 } 356 if (i != childCount - 1) { 357 lp.rightMargin = extraPixels / 2; 358 } 359 } 360 } 361 362 cellsRemaining = 0; 363 } 364 365 // Remeasure any items that have had extra space allocated to them. 366 if (needsExpansion) { 367 for (int i = 0; i < childCount; i++) { 368 final View child = getChildAt(i); 369 final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 370 371 if (!lp.expanded) continue; 372 373 final int width = lp.cellsUsed * cellSize + lp.extraPixels; 374 child.measure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY), 375 itemHeightSpec); 376 } 377 } 378 379 if (heightMode != MeasureSpec.EXACTLY) { 380 heightSize = maxChildHeight; 381 } 382 383 setMeasuredDimension(widthSize, heightSize); 384 } 385 386 /** 387 * Measure a child view to fit within cell-based formatting. The child's width 388 * will be measured to a whole multiple of cellSize. 389 * 390 * <p>Sets the expandable and cellsUsed fields of LayoutParams. 391 * 392 * @param child Child to measure 393 * @param cellSize Size of one cell 394 * @param cellsRemaining Number of cells remaining that this view can expand to fill 395 * @param parentHeightMeasureSpec MeasureSpec used by the parent view 396 * @param parentHeightPadding Padding present in the parent view 397 * @return Number of cells this child was measured to occupy 398 */ 399 static int measureChildForCells(View child, int cellSize, int cellsRemaining, 400 int parentHeightMeasureSpec, int parentHeightPadding) { 401 final LayoutParams lp = (LayoutParams) child.getLayoutParams(); 402 403 final int childHeightSize = MeasureSpec.getSize(parentHeightMeasureSpec) - 404 parentHeightPadding; 405 final int childHeightMode = MeasureSpec.getMode(parentHeightMeasureSpec); 406 final int childHeightSpec = MeasureSpec.makeMeasureSpec(childHeightSize, childHeightMode); 407 408 final ActionMenuItemView itemView = child instanceof ActionMenuItemView ? 409 (ActionMenuItemView) child : null; 410 final boolean hasText = itemView != null && itemView.hasText(); 411 412 int cellsUsed = 0; 413 if (cellsRemaining > 0 && (!hasText || cellsRemaining >= 2)) { 414 final int childWidthSpec = MeasureSpec.makeMeasureSpec( 415 cellSize * cellsRemaining, MeasureSpec.AT_MOST); 416 child.measure(childWidthSpec, childHeightSpec); 417 418 final int measuredWidth = child.getMeasuredWidth(); 419 cellsUsed = measuredWidth / cellSize; 420 if (measuredWidth % cellSize != 0) cellsUsed++; 421 if (hasText && cellsUsed < 2) cellsUsed = 2; 422 } 423 424 final boolean expandable = !lp.isOverflowButton && hasText; 425 lp.expandable = expandable; 426 427 lp.cellsUsed = cellsUsed; 428 final int targetWidth = cellsUsed * cellSize; 429 child.measure(MeasureSpec.makeMeasureSpec(targetWidth, MeasureSpec.EXACTLY), 430 childHeightSpec); 431 return cellsUsed; 432 } 433 434 @Override 435 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 436 if (!mFormatItems) { 437 super.onLayout(changed, left, top, right, bottom); 438 return; 439 } 440 441 final int childCount = getChildCount(); 442 final int midVertical = (bottom - top) / 2; 443 final int dividerWidth = getDividerWidth(); 444 int overflowWidth = 0; 445 int nonOverflowWidth = 0; 446 int nonOverflowCount = 0; 447 int widthRemaining = right - left - getPaddingRight() - getPaddingLeft(); 448 boolean hasOverflow = false; 449 final boolean isLayoutRtl = ViewUtils.isLayoutRtl(this); 450 for (int i = 0; i < childCount; i++) { 451 final View v = getChildAt(i); 452 if (v.getVisibility() == GONE) { 453 continue; 454 } 455 456 LayoutParams p = (LayoutParams) v.getLayoutParams(); 457 if (p.isOverflowButton) { 458 overflowWidth = v.getMeasuredWidth(); 459 if (hasSupportDividerBeforeChildAt(i)) { 460 overflowWidth += dividerWidth; 461 } 462 int height = v.getMeasuredHeight(); 463 int r; 464 int l; 465 if (isLayoutRtl) { 466 l = getPaddingLeft() + p.leftMargin; 467 r = l + overflowWidth; 468 } else { 469 r = getWidth() - getPaddingRight() - p.rightMargin; 470 l = r - overflowWidth; 471 } 472 int t = midVertical - (height / 2); 473 int b = t + height; 474 v.layout(l, t, r, b); 475 476 widthRemaining -= overflowWidth; 477 hasOverflow = true; 478 } else { 479 final int size = v.getMeasuredWidth() + p.leftMargin + p.rightMargin; 480 nonOverflowWidth += size; 481 widthRemaining -= size; 482 if (hasSupportDividerBeforeChildAt(i)) { 483 nonOverflowWidth += dividerWidth; 484 } 485 nonOverflowCount++; 486 } 487 } 488 489 if (childCount == 1 && !hasOverflow) { 490 // Center a single child 491 final View v = getChildAt(0); 492 final int width = v.getMeasuredWidth(); 493 final int height = v.getMeasuredHeight(); 494 final int midHorizontal = (right - left) / 2; 495 final int l = midHorizontal - width / 2; 496 final int t = midVertical - height / 2; 497 v.layout(l, t, l + width, t + height); 498 return; 499 } 500 501 final int spacerCount = nonOverflowCount - (hasOverflow ? 0 : 1); 502 final int spacerSize = Math.max(0, spacerCount > 0 ? widthRemaining / spacerCount : 0); 503 504 if (isLayoutRtl) { 505 int startRight = getWidth() - getPaddingRight(); 506 for (int i = 0; i < childCount; i++) { 507 final View v = getChildAt(i); 508 final LayoutParams lp = (LayoutParams) v.getLayoutParams(); 509 if (v.getVisibility() == GONE || lp.isOverflowButton) { 510 continue; 511 } 512 513 startRight -= lp.rightMargin; 514 int width = v.getMeasuredWidth(); 515 int height = v.getMeasuredHeight(); 516 int t = midVertical - height / 2; 517 v.layout(startRight - width, t, startRight, t + height); 518 startRight -= width + lp.leftMargin + spacerSize; 519 } 520 } else { 521 int startLeft = getPaddingLeft(); 522 for (int i = 0; i < childCount; i++) { 523 final View v = getChildAt(i); 524 final LayoutParams lp = (LayoutParams) v.getLayoutParams(); 525 if (v.getVisibility() == GONE || lp.isOverflowButton) { 526 continue; 527 } 528 529 startLeft += lp.leftMargin; 530 int width = v.getMeasuredWidth(); 531 int height = v.getMeasuredHeight(); 532 int t = midVertical - height / 2; 533 v.layout(startLeft, t, startLeft + width, t + height); 534 startLeft += width + lp.rightMargin + spacerSize; 535 } 536 } 537 } 538 539 @Override 540 public void onDetachedFromWindow() { 541 super.onDetachedFromWindow(); 542 dismissPopupMenus(); 543 } 544 545 /** @hide */ 546 public boolean isOverflowReserved() { 547 return mReserveOverflow; 548 } 549 550 /** @hide */ 551 public void setOverflowReserved(boolean reserveOverflow) { 552 mReserveOverflow = reserveOverflow; 553 } 554 555 @Override 556 protected LayoutParams generateDefaultLayoutParams() { 557 LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, 558 LayoutParams.WRAP_CONTENT); 559 params.gravity = Gravity.CENTER_VERTICAL; 560 return params; 561 } 562 563 @Override 564 public LayoutParams generateLayoutParams(AttributeSet attrs) { 565 return new LayoutParams(getContext(), attrs); 566 } 567 568 @Override 569 protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { 570 if (p != null) { 571 final LayoutParams result = p instanceof LayoutParams 572 ? new LayoutParams((LayoutParams) p) 573 : new LayoutParams(p); 574 if (result.gravity <= Gravity.NO_GRAVITY) { 575 result.gravity = Gravity.CENTER_VERTICAL; 576 } 577 return result; 578 } 579 return generateDefaultLayoutParams(); 580 } 581 582 @Override 583 protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { 584 return p != null && p instanceof LayoutParams; 585 } 586 587 /** @hide */ 588 public LayoutParams generateOverflowButtonLayoutParams() { 589 LayoutParams result = generateDefaultLayoutParams(); 590 result.isOverflowButton = true; 591 return result; 592 } 593 594 /** @hide */ 595 public boolean invokeItem(MenuItemImpl item) { 596 return mMenu.performItemAction(item, 0); 597 } 598 599 /** @hide */ 600 public int getWindowAnimations() { 601 return 0; 602 } 603 604 /** @hide */ 605 public void initialize(MenuBuilder menu) { 606 mMenu = menu; 607 } 608 609 /** 610 * Returns the Menu object that this ActionMenuView is currently presenting. 611 * 612 * <p>Applications should use this method to obtain the ActionMenuView's Menu object 613 * and inflate or add content to it as necessary.</p> 614 * 615 * @return the Menu presented by this view 616 */ 617 public Menu getMenu() { 618 if (mMenu == null) { 619 final Context context = getContext(); 620 mMenu = new MenuBuilder(context); 621 mMenu.setCallback(new MenuBuilderCallback()); 622 mPresenter = new ActionMenuPresenter(context); 623 mPresenter.setReserveOverflow(true); 624 mPresenter.setCallback(mActionMenuPresenterCallback != null 625 ? mActionMenuPresenterCallback : new ActionMenuPresenterCallback()); 626 mMenu.addMenuPresenter(mPresenter, mPopupContext); 627 mPresenter.setMenuView(this); 628 } 629 630 return mMenu; 631 } 632 633 /** 634 * Must be called before the first call to getMenu() 635 * @hide 636 */ 637 public void setMenuCallbacks(MenuPresenter.Callback pcb, MenuBuilder.Callback mcb) { 638 mActionMenuPresenterCallback = pcb; 639 mMenuBuilderCallback = mcb; 640 } 641 642 /** 643 * Returns the current menu or null if one has not yet been configured. 644 * @hide Internal use only for action bar integration 645 */ 646 public MenuBuilder peekMenu() { 647 return mMenu; 648 } 649 650 /** 651 * Show the overflow items from the associated menu. 652 * 653 * @return true if the menu was able to be shown, false otherwise 654 */ 655 public boolean showOverflowMenu() { 656 return mPresenter != null && mPresenter.showOverflowMenu(); 657 } 658 659 /** 660 * Hide the overflow items from the associated menu. 661 * 662 * @return true if the menu was able to be hidden, false otherwise 663 */ 664 public boolean hideOverflowMenu() { 665 return mPresenter != null && mPresenter.hideOverflowMenu(); 666 } 667 668 /** 669 * Check whether the overflow menu is currently showing. This may not reflect 670 * a pending show operation in progress. 671 * 672 * @return true if the overflow menu is currently showing 673 */ 674 public boolean isOverflowMenuShowing() { 675 return mPresenter != null && mPresenter.isOverflowMenuShowing(); 676 } 677 678 /** @hide */ 679 public boolean isOverflowMenuShowPending() { 680 return mPresenter != null && mPresenter.isOverflowMenuShowPending(); 681 } 682 683 /** 684 * Dismiss any popups associated with this menu view. 685 */ 686 public void dismissPopupMenus() { 687 if (mPresenter != null) { 688 mPresenter.dismissPopupMenus(); 689 } 690 } 691 692 /** 693 * @hide Private LinearLayout (superclass) API. Un-hide if LinearLayout API is made public. 694 */ 695 protected boolean hasSupportDividerBeforeChildAt(int childIndex) { 696 if (childIndex == 0) { 697 return false; 698 } 699 final View childBefore = getChildAt(childIndex - 1); 700 final View child = getChildAt(childIndex); 701 boolean result = false; 702 if (childIndex < getChildCount() && childBefore instanceof ActionMenuChildView) { 703 result |= ((ActionMenuChildView) childBefore).needsDividerAfter(); 704 } 705 if (childIndex > 0 && child instanceof ActionMenuChildView) { 706 result |= ((ActionMenuChildView) child).needsDividerBefore(); 707 } 708 return result; 709 } 710 711 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 712 return false; 713 } 714 715 /** @hide */ 716 public void setExpandedActionViewsExclusive(boolean exclusive) { 717 mPresenter.setExpandedActionViewsExclusive(exclusive); 718 } 719 720 /** 721 * Interface responsible for receiving menu item click events if the items themselves 722 * do not have individual item click listeners. 723 */ 724 public interface OnMenuItemClickListener { 725 /** 726 * This method will be invoked when a menu item is clicked if the item itself did 727 * not already handle the event. 728 * 729 * @param item {@link MenuItem} that was clicked 730 * @return <code>true</code> if the event was handled, <code>false</code> otherwise. 731 */ 732 public boolean onMenuItemClick(MenuItem item); 733 } 734 735 private class MenuBuilderCallback implements MenuBuilder.Callback { 736 @Override 737 public boolean onMenuItemSelected(MenuBuilder menu, MenuItem item) { 738 return mOnMenuItemClickListener != null && 739 mOnMenuItemClickListener.onMenuItemClick(item); 740 } 741 742 @Override 743 public void onMenuModeChange(MenuBuilder menu) { 744 if (mMenuBuilderCallback != null) { 745 mMenuBuilderCallback.onMenuModeChange(menu); 746 } 747 } 748 } 749 750 private class ActionMenuPresenterCallback implements ActionMenuPresenter.Callback { 751 @Override 752 public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) { 753 } 754 755 @Override 756 public boolean onOpenSubMenu(MenuBuilder subMenu) { 757 return false; 758 } 759 } 760 761 /** @hide */ 762 public interface ActionMenuChildView { 763 public boolean needsDividerBefore(); 764 public boolean needsDividerAfter(); 765 } 766 767 public static class LayoutParams extends LinearLayoutCompat.LayoutParams { 768 769 @ViewDebug.ExportedProperty() 770 public boolean isOverflowButton; 771 772 @ViewDebug.ExportedProperty() 773 public int cellsUsed; 774 775 @ViewDebug.ExportedProperty() 776 public int extraPixels; 777 778 @ViewDebug.ExportedProperty() 779 public boolean expandable; 780 781 @ViewDebug.ExportedProperty() 782 public boolean preventEdgeOffset; 783 784 boolean expanded; 785 786 public LayoutParams(Context c, AttributeSet attrs) { 787 super(c, attrs); 788 } 789 790 public LayoutParams(ViewGroup.LayoutParams other) { 791 super(other); 792 } 793 794 public LayoutParams(LayoutParams other) { 795 super((ViewGroup.LayoutParams) other); 796 isOverflowButton = other.isOverflowButton; 797 } 798 799 public LayoutParams(int width, int height) { 800 super(width, height); 801 isOverflowButton = false; 802 } 803 804 LayoutParams(int width, int height, boolean isOverflowButton) { 805 super(width, height); 806 this.isOverflowButton = isOverflowButton; 807 } 808 } 809} 810