BrowseSupportFragment.java revision 5ae73b45620a3d535b2d279512d5d34603e2bdb1
1/* This file is auto-generated from BrowseFragment.java. DO NOT MODIFY. */ 2 3/* 4 * Copyright (C) 2014 The Android Open Source Project 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 7 * in compliance with the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software distributed under the License 12 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 13 * or implied. See the License for the specific language governing permissions and limitations under 14 * the License. 15 */ 16package android.support.v17.leanback.app; 17 18import android.support.v17.leanback.R; 19import android.support.v17.leanback.transition.TransitionHelper; 20import android.support.v17.leanback.transition.TransitionListener; 21import android.support.v17.leanback.widget.BrowseFrameLayout; 22import android.support.v17.leanback.widget.HorizontalGridView; 23import android.support.v17.leanback.widget.ItemBridgeAdapter; 24import android.support.v17.leanback.widget.OnItemViewClickedListener; 25import android.support.v17.leanback.widget.OnItemViewSelectedListener; 26import android.support.v17.leanback.widget.Presenter; 27import android.support.v17.leanback.widget.PresenterSelector; 28import android.support.v17.leanback.widget.RowPresenter; 29import android.support.v17.leanback.widget.TitleView; 30import android.support.v17.leanback.widget.VerticalGridView; 31import android.support.v17.leanback.widget.Row; 32import android.support.v17.leanback.widget.ObjectAdapter; 33import android.support.v17.leanback.widget.OnItemSelectedListener; 34import android.support.v17.leanback.widget.OnItemClickedListener; 35import android.support.v17.leanback.widget.SearchOrbView; 36import android.support.v4.view.ViewCompat; 37import android.util.Log; 38import android.support.v4.app.FragmentActivity; 39import android.support.v4.app.Fragment; 40import android.support.v4.app.FragmentManager; 41import android.support.v4.app.FragmentManager.BackStackEntry; 42import android.content.Context; 43import android.content.res.TypedArray; 44import android.os.Bundle; 45import android.view.LayoutInflater; 46import android.view.View; 47import android.view.View.OnClickListener; 48import android.view.ViewGroup; 49import android.view.ViewGroup.MarginLayoutParams; 50import android.view.ViewTreeObserver; 51import android.graphics.Color; 52import android.graphics.Rect; 53import android.graphics.drawable.Drawable; 54 55import static android.support.v7.widget.RecyclerView.NO_POSITION; 56 57/** 58 * A fragment for creating Leanback browse screens. It is composed of a 59 * RowsSupportFragment and a HeadersSupportFragment. 60 * <p> 61 * A BrowseSupportFragment renders the elements of its {@link ObjectAdapter} as a set 62 * of rows in a vertical list. The elements in this adapter must be subclasses 63 * of {@link Row}. 64 * <p> 65 * The HeadersSupportFragment can be set to be either shown or hidden by default, or 66 * may be disabled entirely. See {@link #setHeadersState} for details. 67 * <p> 68 * By default the BrowseSupportFragment includes support for returning to the headers 69 * when the user presses Back. For Activities that customize {@link 70 * android.support.v4.app.FragmentActivity#onBackPressed()}, you must disable this default Back key support by 71 * calling {@link #setHeadersTransitionOnBackEnabled(boolean)} with false and 72 * use {@link BrowseSupportFragment.BrowseTransitionListener} and 73 * {@link #startHeadersTransition(boolean)}. 74 */ 75public class BrowseSupportFragment extends BaseSupportFragment { 76 77 // BUNDLE attribute for saving header show/hide status when backstack is used: 78 static final String HEADER_STACK_INDEX = "headerStackIndex"; 79 // BUNDLE attribute for saving header show/hide status when backstack is not used: 80 static final String HEADER_SHOW = "headerShow"; 81 // BUNDLE attribute for title is showing 82 static final String TITLE_SHOW = "titleShow"; 83 84 final class BackStackListener implements FragmentManager.OnBackStackChangedListener { 85 int mLastEntryCount; 86 int mIndexOfHeadersBackStack; 87 88 BackStackListener() { 89 mLastEntryCount = getFragmentManager().getBackStackEntryCount(); 90 mIndexOfHeadersBackStack = -1; 91 } 92 93 void load(Bundle savedInstanceState) { 94 if (savedInstanceState != null) { 95 mIndexOfHeadersBackStack = savedInstanceState.getInt(HEADER_STACK_INDEX, -1); 96 mShowingHeaders = mIndexOfHeadersBackStack == -1; 97 } else { 98 if (!mShowingHeaders) { 99 getFragmentManager().beginTransaction() 100 .addToBackStack(mWithHeadersBackStackName).commit(); 101 } 102 } 103 } 104 105 void save(Bundle outState) { 106 outState.putInt(HEADER_STACK_INDEX, mIndexOfHeadersBackStack); 107 } 108 109 110 @Override 111 public void onBackStackChanged() { 112 if (getFragmentManager() == null) { 113 Log.w(TAG, "getFragmentManager() is null, stack:", new Exception()); 114 return; 115 } 116 int count = getFragmentManager().getBackStackEntryCount(); 117 // if backstack is growing and last pushed entry is "headers" backstack, 118 // remember the index of the entry. 119 if (count > mLastEntryCount) { 120 BackStackEntry entry = getFragmentManager().getBackStackEntryAt(count - 1); 121 if (mWithHeadersBackStackName.equals(entry.getName())) { 122 mIndexOfHeadersBackStack = count - 1; 123 } 124 } else if (count < mLastEntryCount) { 125 // if popped "headers" backstack, initiate the show header transition if needed 126 if (mIndexOfHeadersBackStack >= count) { 127 mIndexOfHeadersBackStack = -1; 128 if (!mShowingHeaders) { 129 startHeadersTransitionInternal(true); 130 } 131 } 132 } 133 mLastEntryCount = count; 134 } 135 } 136 137 /** 138 * Listener for transitions between browse headers and rows. 139 */ 140 public static class BrowseTransitionListener { 141 /** 142 * Callback when headers transition starts. 143 * 144 * @param withHeaders True if the transition will result in headers 145 * being shown, false otherwise. 146 */ 147 public void onHeadersTransitionStart(boolean withHeaders) { 148 } 149 /** 150 * Callback when headers transition stops. 151 * 152 * @param withHeaders True if the transition will result in headers 153 * being shown, false otherwise. 154 */ 155 public void onHeadersTransitionStop(boolean withHeaders) { 156 } 157 } 158 159 private static final String TAG = "BrowseSupportFragment"; 160 161 private static final String LB_HEADERS_BACKSTACK = "lbHeadersBackStack_"; 162 163 private static boolean DEBUG = false; 164 165 /** The headers fragment is enabled and shown by default. */ 166 public static final int HEADERS_ENABLED = 1; 167 168 /** The headers fragment is enabled and hidden by default. */ 169 public static final int HEADERS_HIDDEN = 2; 170 171 /** The headers fragment is disabled and will never be shown. */ 172 public static final int HEADERS_DISABLED = 3; 173 174 private static final float SLIDE_DISTANCE_FACTOR = 2; 175 176 private RowsSupportFragment mRowsSupportFragment; 177 private HeadersSupportFragment mHeadersSupportFragment; 178 179 private ObjectAdapter mAdapter; 180 181 private String mTitle; 182 private Drawable mBadgeDrawable; 183 private int mHeadersState = HEADERS_ENABLED; 184 private int mBrandColor = Color.TRANSPARENT; 185 private boolean mBrandColorSet; 186 187 private BrowseFrameLayout mBrowseFrame; 188 private TitleView mTitleView; 189 private boolean mShowingTitle = true; 190 private boolean mHeadersBackStackEnabled = true; 191 private String mWithHeadersBackStackName; 192 private boolean mShowingHeaders = true; 193 private boolean mCanShowHeaders = true; 194 private int mContainerListMarginStart; 195 private int mContainerListAlignTop; 196 private boolean mRowScaleEnabled = true; 197 private SearchOrbView.Colors mSearchAffordanceColors; 198 private boolean mSearchAffordanceColorSet; 199 private OnItemSelectedListener mExternalOnItemSelectedListener; 200 private OnClickListener mExternalOnSearchClickedListener; 201 private OnItemClickedListener mOnItemClickedListener; 202 private OnItemViewSelectedListener mExternalOnItemViewSelectedListener; 203 private OnItemViewClickedListener mOnItemViewClickedListener; 204 private int mSelectedPosition = -1; 205 206 private PresenterSelector mHeaderPresenterSelector; 207 208 // transition related: 209 private Object mSceneWithTitle; 210 private Object mSceneWithoutTitle; 211 private Object mSceneWithHeaders; 212 private Object mSceneWithoutHeaders; 213 private Object mSceneAfterEntranceTransition; 214 private Object mTitleUpTransition; 215 private Object mTitleDownTransition; 216 private Object mHeadersTransition; 217 private BackStackListener mBackStackChangedListener; 218 private BrowseTransitionListener mBrowseTransitionListener; 219 220 private static final String ARG_TITLE = BrowseSupportFragment.class.getCanonicalName() + ".title"; 221 private static final String ARG_BADGE_URI = BrowseSupportFragment.class.getCanonicalName() + ".badge"; 222 private static final String ARG_HEADERS_STATE = 223 BrowseSupportFragment.class.getCanonicalName() + ".headersState"; 224 225 /** 226 * Create arguments for a browse fragment. 227 * 228 * @param args The Bundle to place arguments into, or null if the method 229 * should return a new Bundle. 230 * @param title The title of the BrowseSupportFragment. 231 * @param headersState The initial state of the headers of the 232 * BrowseSupportFragment. Must be one of {@link #HEADERS_ENABLED}, {@link 233 * #HEADERS_HIDDEN}, or {@link #HEADERS_DISABLED}. 234 * @return A Bundle with the given arguments for creating a BrowseSupportFragment. 235 */ 236 public static Bundle createArgs(Bundle args, String title, int headersState) { 237 if (args == null) { 238 args = new Bundle(); 239 } 240 args.putString(ARG_TITLE, title); 241 args.putInt(ARG_HEADERS_STATE, headersState); 242 return args; 243 } 244 245 /** 246 * Sets the brand color for the browse fragment. The brand color is used as 247 * the primary color for UI elements in the browse fragment. For example, 248 * the background color of the headers fragment uses the brand color. 249 * 250 * @param color The color to use as the brand color of the fragment. 251 */ 252 public void setBrandColor(int color) { 253 mBrandColor = color; 254 mBrandColorSet = true; 255 256 if (mHeadersSupportFragment != null) { 257 mHeadersSupportFragment.setBackgroundColor(mBrandColor); 258 } 259 } 260 261 /** 262 * Returns the brand color for the browse fragment. 263 * The default is transparent. 264 */ 265 public int getBrandColor() { 266 return mBrandColor; 267 } 268 269 /** 270 * Sets the adapter containing the rows for the fragment. 271 * 272 * <p>The items referenced by the adapter must be be derived from 273 * {@link Row}. These rows will be used by the rows fragment and the headers 274 * fragment (if not disabled) to render the browse rows. 275 * 276 * @param adapter An ObjectAdapter for the browse rows. All items must 277 * derive from {@link Row}. 278 */ 279 public void setAdapter(ObjectAdapter adapter) { 280 mAdapter = adapter; 281 if (mRowsSupportFragment != null) { 282 mRowsSupportFragment.setAdapter(adapter); 283 mHeadersSupportFragment.setAdapter(adapter); 284 } 285 } 286 287 /** 288 * Returns the adapter containing the rows for the fragment. 289 */ 290 public ObjectAdapter getAdapter() { 291 return mAdapter; 292 } 293 294 /** 295 * Sets an item selection listener. This listener will be called when an 296 * item or row is selected by a user. 297 * 298 * @param listener The listener to call when an item or row is selected. 299 * @deprecated Use {@link #setOnItemViewSelectedListener(OnItemViewSelectedListener)} 300 */ 301 public void setOnItemSelectedListener(OnItemSelectedListener listener) { 302 mExternalOnItemSelectedListener = listener; 303 } 304 305 /** 306 * Sets an item selection listener. 307 */ 308 public void setOnItemViewSelectedListener(OnItemViewSelectedListener listener) { 309 mExternalOnItemViewSelectedListener = listener; 310 } 311 312 /** 313 * Returns an item selection listener. 314 */ 315 public OnItemViewSelectedListener getOnItemViewSelectedListener() { 316 return mExternalOnItemViewSelectedListener; 317 } 318 319 /** 320 * Sets an item clicked listener on the fragment. 321 * 322 * <p>OnItemClickedListener will override {@link View.OnClickListener} that 323 * an item presenter may set during 324 * {@link Presenter#onCreateViewHolder(ViewGroup)}. So in general, you 325 * should choose to use an {@link OnItemClickedListener} or a 326 * {@link View.OnClickListener} on your item views, but not both. 327 * 328 * @param listener The listener to call when an item is clicked. 329 * @deprecated Use {@link #setOnItemViewClickedListener(OnItemViewClickedListener)} 330 */ 331 public void setOnItemClickedListener(OnItemClickedListener listener) { 332 mOnItemClickedListener = listener; 333 if (mRowsSupportFragment != null) { 334 mRowsSupportFragment.setOnItemClickedListener(listener); 335 } 336 } 337 338 /** 339 * Returns the item clicked listener. 340 * @deprecated Use {@link #getOnItemViewClickedListener()} 341 */ 342 public OnItemClickedListener getOnItemClickedListener() { 343 return mOnItemClickedListener; 344 } 345 346 /** 347 * Sets an item clicked listener on the fragment. 348 * OnItemViewClickedListener will override {@link View.OnClickListener} that 349 * item presenter sets during {@link Presenter#onCreateViewHolder(ViewGroup)}. 350 * So in general, developer should choose one of the listeners but not both. 351 */ 352 public void setOnItemViewClickedListener(OnItemViewClickedListener listener) { 353 mOnItemViewClickedListener = listener; 354 if (mRowsSupportFragment != null) { 355 mRowsSupportFragment.setOnItemViewClickedListener(listener); 356 } 357 } 358 359 /** 360 * Returns the item Clicked listener. 361 */ 362 public OnItemViewClickedListener getOnItemViewClickedListener() { 363 return mOnItemViewClickedListener; 364 } 365 366 /** 367 * Sets a click listener for the search affordance. 368 * 369 * <p>The presence of a listener will change the visibility of the search 370 * affordance in the fragment title. When set to non-null, the title will 371 * contain an element that a user may click to begin a search. 372 * 373 * <p>The listener's {@link View.OnClickListener#onClick onClick} method 374 * will be invoked when the user clicks on the search element. 375 * 376 * @param listener The listener to call when the search element is clicked. 377 */ 378 public void setOnSearchClickedListener(View.OnClickListener listener) { 379 mExternalOnSearchClickedListener = listener; 380 if (mTitleView != null) { 381 mTitleView.setOnSearchClickedListener(listener); 382 } 383 } 384 385 /** 386 * Sets the {@link SearchOrbView.Colors} used to draw the search affordance. 387 */ 388 public void setSearchAffordanceColors(SearchOrbView.Colors colors) { 389 mSearchAffordanceColors = colors; 390 mSearchAffordanceColorSet = true; 391 if (mTitleView != null) { 392 mTitleView.setSearchAffordanceColors(mSearchAffordanceColors); 393 } 394 } 395 396 /** 397 * Returns the {@link SearchOrbView.Colors} used to draw the search affordance. 398 */ 399 public SearchOrbView.Colors getSearchAffordanceColors() { 400 if (mSearchAffordanceColorSet) { 401 return mSearchAffordanceColors; 402 } 403 if (mTitleView == null) { 404 throw new IllegalStateException("Fragment views not yet created"); 405 } 406 return mTitleView.getSearchAffordanceColors(); 407 } 408 409 /** 410 * Sets the color used to draw the search affordance. 411 * A default brighter color will be set by the framework. 412 * 413 * @param color The color to use for the search affordance. 414 */ 415 public void setSearchAffordanceColor(int color) { 416 setSearchAffordanceColors(new SearchOrbView.Colors(color)); 417 } 418 419 /** 420 * Returns the color used to draw the search affordance. 421 */ 422 public int getSearchAffordanceColor() { 423 return getSearchAffordanceColors().color; 424 } 425 426 /** 427 * Start a headers transition. 428 * 429 * <p>This method will begin a transition to either show or hide the 430 * headers, depending on the value of withHeaders. If headers are disabled 431 * for this browse fragment, this method will throw an exception. 432 * 433 * @param withHeaders True if the headers should transition to being shown, 434 * false if the transition should result in headers being hidden. 435 */ 436 public void startHeadersTransition(boolean withHeaders) { 437 if (!mCanShowHeaders) { 438 throw new IllegalStateException("Cannot start headers transition"); 439 } 440 if (isInHeadersTransition() || mShowingHeaders == withHeaders) { 441 return; 442 } 443 startHeadersTransitionInternal(withHeaders); 444 } 445 446 /** 447 * Returns true if the headers transition is currently running. 448 */ 449 public boolean isInHeadersTransition() { 450 return mHeadersTransition != null; 451 } 452 453 /** 454 * Returns true if headers are shown. 455 */ 456 public boolean isShowingHeaders() { 457 return mShowingHeaders; 458 } 459 460 /** 461 * Set a listener for browse fragment transitions. 462 * 463 * @param listener The listener to call when a browse headers transition 464 * begins or ends. 465 */ 466 public void setBrowseTransitionListener(BrowseTransitionListener listener) { 467 mBrowseTransitionListener = listener; 468 } 469 470 /** 471 * Enables scaling of rows when headers are present. 472 * By default enabled to increase density. 473 * 474 * @param enable true to enable row scaling 475 */ 476 public void enableRowScaling(boolean enable) { 477 mRowScaleEnabled = enable; 478 if (mRowsSupportFragment != null) { 479 mRowsSupportFragment.enableRowScaling(mRowScaleEnabled); 480 } 481 } 482 483 private void startHeadersTransitionInternal(final boolean withHeaders) { 484 if (getFragmentManager().isDestroyed()) { 485 return; 486 } 487 mShowingHeaders = withHeaders; 488 mRowsSupportFragment.onExpandTransitionStart(!withHeaders, new Runnable() { 489 @Override 490 public void run() { 491 mHeadersSupportFragment.onTransitionStart(); 492 createHeadersTransition(); 493 if (mBrowseTransitionListener != null) { 494 mBrowseTransitionListener.onHeadersTransitionStart(withHeaders); 495 } 496 sTransitionHelper.runTransition(withHeaders ? mSceneWithHeaders : mSceneWithoutHeaders, 497 mHeadersTransition); 498 if (mHeadersBackStackEnabled) { 499 if (!withHeaders) { 500 getFragmentManager().beginTransaction() 501 .addToBackStack(mWithHeadersBackStackName).commit(); 502 } else { 503 int index = mBackStackChangedListener.mIndexOfHeadersBackStack; 504 if (index >= 0) { 505 BackStackEntry entry = getFragmentManager().getBackStackEntryAt(index); 506 getFragmentManager().popBackStackImmediate(entry.getId(), 507 FragmentManager.POP_BACK_STACK_INCLUSIVE); 508 } 509 } 510 } 511 } 512 }); 513 } 514 515 private boolean isVerticalScrolling() { 516 // don't run transition 517 return mHeadersSupportFragment.getVerticalGridView().getScrollState() 518 != HorizontalGridView.SCROLL_STATE_IDLE 519 || mRowsSupportFragment.getVerticalGridView().getScrollState() 520 != HorizontalGridView.SCROLL_STATE_IDLE; 521 } 522 523 private final BrowseFrameLayout.OnFocusSearchListener mOnFocusSearchListener = 524 new BrowseFrameLayout.OnFocusSearchListener() { 525 @Override 526 public View onFocusSearch(View focused, int direction) { 527 // if headers is running transition, focus stays 528 if (mCanShowHeaders && isInHeadersTransition()) { 529 return focused; 530 } 531 if (DEBUG) Log.v(TAG, "onFocusSearch focused " + focused + " + direction " + direction); 532 533 final View searchOrbView = mTitleView.getSearchAffordanceView(); 534 if (focused == searchOrbView && direction == View.FOCUS_DOWN) { 535 return mCanShowHeaders && mShowingHeaders ? 536 mHeadersSupportFragment.getVerticalGridView() : 537 mRowsSupportFragment.getVerticalGridView(); 538 } else if (focused != searchOrbView && searchOrbView.getVisibility() == View.VISIBLE 539 && direction == View.FOCUS_UP) { 540 return searchOrbView; 541 } 542 543 // If headers fragment is disabled, just return null. 544 if (!mCanShowHeaders) { 545 return null; 546 } 547 boolean isRtl = ViewCompat.getLayoutDirection(focused) == View.LAYOUT_DIRECTION_RTL; 548 int towardStart = isRtl ? View.FOCUS_RIGHT : View.FOCUS_LEFT; 549 int towardEnd = isRtl ? View.FOCUS_LEFT : View.FOCUS_RIGHT; 550 if (direction == towardStart) { 551 if (isVerticalScrolling() || mShowingHeaders) { 552 return focused; 553 } 554 return mHeadersSupportFragment.getVerticalGridView(); 555 } else if (direction == towardEnd) { 556 if (isVerticalScrolling() || !mShowingHeaders) { 557 return focused; 558 } 559 return mRowsSupportFragment.getVerticalGridView(); 560 } else { 561 return null; 562 } 563 } 564 }; 565 566 private final BrowseFrameLayout.OnChildFocusListener mOnChildFocusListener = 567 new BrowseFrameLayout.OnChildFocusListener() { 568 569 @Override 570 public boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { 571 if (getChildFragmentManager().isDestroyed()) { 572 return true; 573 } 574 // Make sure not changing focus when requestFocus() is called. 575 if (mCanShowHeaders && mShowingHeaders) { 576 if (mHeadersSupportFragment != null && mHeadersSupportFragment.getView() != null && 577 mHeadersSupportFragment.getView().requestFocus(direction, previouslyFocusedRect)) { 578 return true; 579 } 580 } 581 if (mRowsSupportFragment != null && mRowsSupportFragment.getView() != null && 582 mRowsSupportFragment.getView().requestFocus(direction, previouslyFocusedRect)) { 583 return true; 584 } 585 if (mTitleView != null && 586 mTitleView.requestFocus(direction, previouslyFocusedRect)) { 587 return true; 588 } 589 return false; 590 }; 591 592 @Override 593 public void onRequestChildFocus(View child, View focused) { 594 if (getChildFragmentManager().isDestroyed()) { 595 return; 596 } 597 if (!mCanShowHeaders || isInHeadersTransition()) return; 598 int childId = child.getId(); 599 if (childId == R.id.browse_container_dock && mShowingHeaders) { 600 startHeadersTransitionInternal(false); 601 } else if (childId == R.id.browse_headers_dock && !mShowingHeaders) { 602 startHeadersTransitionInternal(true); 603 } 604 } 605 }; 606 607 @Override 608 public void onSaveInstanceState(Bundle outState) { 609 if (mBackStackChangedListener != null) { 610 mBackStackChangedListener.save(outState); 611 } else { 612 outState.putBoolean(HEADER_SHOW, mShowingHeaders); 613 } 614 outState.putBoolean(TITLE_SHOW, mShowingTitle); 615 } 616 617 @Override 618 public void onCreate(Bundle savedInstanceState) { 619 super.onCreate(savedInstanceState); 620 TypedArray ta = getActivity().obtainStyledAttributes(R.styleable.LeanbackTheme); 621 mContainerListMarginStart = (int) ta.getDimension( 622 R.styleable.LeanbackTheme_browseRowsMarginStart, 0); 623 mContainerListAlignTop = (int) ta.getDimension( 624 R.styleable.LeanbackTheme_browseRowsMarginTop, 0); 625 ta.recycle(); 626 627 readArguments(getArguments()); 628 629 if (mCanShowHeaders) { 630 if (mHeadersBackStackEnabled) { 631 mWithHeadersBackStackName = LB_HEADERS_BACKSTACK + this; 632 mBackStackChangedListener = new BackStackListener(); 633 getFragmentManager().addOnBackStackChangedListener(mBackStackChangedListener); 634 mBackStackChangedListener.load(savedInstanceState); 635 } else { 636 if (savedInstanceState != null) { 637 mShowingHeaders = savedInstanceState.getBoolean(HEADER_SHOW); 638 } 639 } 640 } 641 642 } 643 644 @Override 645 public void onDestroy() { 646 if (mBackStackChangedListener != null) { 647 getFragmentManager().removeOnBackStackChangedListener(mBackStackChangedListener); 648 } 649 super.onDestroy(); 650 } 651 652 @Override 653 public View onCreateView(LayoutInflater inflater, ViewGroup container, 654 Bundle savedInstanceState) { 655 if (getChildFragmentManager().findFragmentById(R.id.browse_container_dock) == null) { 656 mRowsSupportFragment = new RowsSupportFragment(); 657 mHeadersSupportFragment = new HeadersSupportFragment(); 658 getChildFragmentManager().beginTransaction() 659 .replace(R.id.browse_headers_dock, mHeadersSupportFragment) 660 .replace(R.id.browse_container_dock, mRowsSupportFragment).commit(); 661 } else { 662 mHeadersSupportFragment = (HeadersSupportFragment) getChildFragmentManager() 663 .findFragmentById(R.id.browse_headers_dock); 664 mRowsSupportFragment = (RowsSupportFragment) getChildFragmentManager() 665 .findFragmentById(R.id.browse_container_dock); 666 } 667 668 mHeadersSupportFragment.setHeadersGone(!mCanShowHeaders); 669 670 mRowsSupportFragment.setAdapter(mAdapter); 671 if (mHeaderPresenterSelector != null) { 672 mHeadersSupportFragment.setPresenterSelector(mHeaderPresenterSelector); 673 } 674 mHeadersSupportFragment.setAdapter(mAdapter); 675 676 mRowsSupportFragment.enableRowScaling(mRowScaleEnabled); 677 mRowsSupportFragment.setOnItemSelectedListener(mRowSelectedListener); 678 mRowsSupportFragment.setOnItemViewSelectedListener(mRowViewSelectedListener); 679 mHeadersSupportFragment.setOnItemSelectedListener(mHeaderSelectedListener); 680 mHeadersSupportFragment.setOnHeaderClickedListener(mHeaderClickedListener); 681 mRowsSupportFragment.setOnItemClickedListener(mOnItemClickedListener); 682 mRowsSupportFragment.setOnItemViewClickedListener(mOnItemViewClickedListener); 683 684 View root = inflater.inflate(R.layout.lb_browse_fragment, container, false); 685 686 mBrowseFrame = (BrowseFrameLayout) root.findViewById(R.id.browse_frame); 687 mBrowseFrame.setOnFocusSearchListener(mOnFocusSearchListener); 688 mBrowseFrame.setOnChildFocusListener(mOnChildFocusListener); 689 690 mTitleView = (TitleView) root.findViewById(R.id.browse_title_group); 691 mTitleView.setTitle(mTitle); 692 mTitleView.setBadgeDrawable(mBadgeDrawable); 693 if (mSearchAffordanceColorSet) { 694 mTitleView.setSearchAffordanceColors(mSearchAffordanceColors); 695 } 696 if (mExternalOnSearchClickedListener != null) { 697 mTitleView.setOnSearchClickedListener(mExternalOnSearchClickedListener); 698 } 699 700 if (mBrandColorSet) { 701 mHeadersSupportFragment.setBackgroundColor(mBrandColor); 702 } 703 704 mSceneWithTitle = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 705 @Override 706 public void run() { 707 mTitleView.setVisibility(View.VISIBLE); 708 } 709 }); 710 mSceneWithoutTitle = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 711 @Override 712 public void run() { 713 mTitleView.setVisibility(View.INVISIBLE); 714 } 715 }); 716 mSceneWithHeaders = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 717 @Override 718 public void run() { 719 showHeaders(true); 720 } 721 }); 722 mSceneWithoutHeaders = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 723 @Override 724 public void run() { 725 showHeaders(false); 726 } 727 }); 728 mSceneAfterEntranceTransition = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 729 @Override 730 public void run() { 731 setEntranceTransitionEndState(); 732 } 733 }); 734 Context context = getActivity(); 735 mTitleUpTransition = sTransitionHelper.loadTransition(context, R.transition.lb_title_out); 736 mTitleDownTransition = sTransitionHelper.loadTransition(context, R.transition.lb_title_in); 737 738 if (savedInstanceState != null) { 739 mShowingTitle = savedInstanceState.getBoolean(TITLE_SHOW); 740 } 741 mTitleView.setVisibility(mShowingTitle ? View.VISIBLE: View.INVISIBLE); 742 743 return root; 744 } 745 746 private void createHeadersTransition() { 747 mHeadersTransition = sTransitionHelper.loadTransition(getActivity(), 748 mShowingHeaders ? 749 R.transition.lb_browse_headers_in : R.transition.lb_browse_headers_out); 750 751 sTransitionHelper.setTransitionListener(mHeadersTransition, new TransitionListener() { 752 @Override 753 public void onTransitionStart(Object transition) { 754 } 755 @Override 756 public void onTransitionEnd(Object transition) { 757 mHeadersTransition = null; 758 mRowsSupportFragment.onTransitionEnd(); 759 mHeadersSupportFragment.onTransitionEnd(); 760 if (mShowingHeaders) { 761 VerticalGridView headerGridView = mHeadersSupportFragment.getVerticalGridView(); 762 if (headerGridView != null && !headerGridView.hasFocus()) { 763 headerGridView.requestFocus(); 764 } 765 } else { 766 VerticalGridView rowsGridView = mRowsSupportFragment.getVerticalGridView(); 767 if (rowsGridView != null && !rowsGridView.hasFocus()) { 768 rowsGridView.requestFocus(); 769 } 770 } 771 if (mBrowseTransitionListener != null) { 772 mBrowseTransitionListener.onHeadersTransitionStop(mShowingHeaders); 773 } 774 } 775 }); 776 } 777 778 /** 779 * Sets the {@link PresenterSelector} used to render the row headers. 780 * 781 * @param headerPresenterSelector The PresenterSelector that will determine 782 * the Presenter for each row header. 783 */ 784 public void setHeaderPresenterSelector(PresenterSelector headerPresenterSelector) { 785 mHeaderPresenterSelector = headerPresenterSelector; 786 if (mHeadersSupportFragment != null) { 787 mHeadersSupportFragment.setPresenterSelector(mHeaderPresenterSelector); 788 } 789 } 790 791 private void setRowsAlignedLeft(boolean alignLeft) { 792 MarginLayoutParams lp; 793 View containerList; 794 containerList = mRowsSupportFragment.getView(); 795 lp = (MarginLayoutParams) containerList.getLayoutParams(); 796 lp.setMarginStart(alignLeft ? 0 : mContainerListMarginStart); 797 containerList.setLayoutParams(lp); 798 } 799 800 private void setHeadersOnScreen(boolean onScreen) { 801 MarginLayoutParams lp; 802 View containerList; 803 containerList = mHeadersSupportFragment.getView(); 804 lp = (MarginLayoutParams) containerList.getLayoutParams(); 805 lp.setMarginStart(onScreen ? 0 : -mContainerListMarginStart); 806 containerList.setLayoutParams(lp); 807 } 808 809 private void showHeaders(boolean show) { 810 if (DEBUG) Log.v(TAG, "showHeaders " + show); 811 mHeadersSupportFragment.setHeadersEnabled(show); 812 setHeadersOnScreen(show); 813 setRowsAlignedLeft(!show); 814 mRowsSupportFragment.setExpand(!show); 815 } 816 817 private HeadersSupportFragment.OnHeaderClickedListener mHeaderClickedListener = 818 new HeadersSupportFragment.OnHeaderClickedListener() { 819 @Override 820 public void onHeaderClicked() { 821 if (!mCanShowHeaders || !mShowingHeaders || isInHeadersTransition()) { 822 return; 823 } 824 startHeadersTransitionInternal(false); 825 mRowsSupportFragment.getVerticalGridView().requestFocus(); 826 } 827 }; 828 829 private OnItemViewSelectedListener mRowViewSelectedListener = new OnItemViewSelectedListener() { 830 @Override 831 public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item, 832 RowPresenter.ViewHolder rowViewHolder, Row row) { 833 int position = mRowsSupportFragment.getVerticalGridView().getSelectedPosition(); 834 if (DEBUG) Log.v(TAG, "row selected position " + position); 835 onRowSelected(position); 836 if (mExternalOnItemViewSelectedListener != null) { 837 mExternalOnItemViewSelectedListener.onItemSelected(itemViewHolder, item, 838 rowViewHolder, row); 839 } 840 } 841 }; 842 843 private OnItemSelectedListener mRowSelectedListener = new OnItemSelectedListener() { 844 @Override 845 public void onItemSelected(Object item, Row row) { 846 if (mExternalOnItemSelectedListener != null) { 847 mExternalOnItemSelectedListener.onItemSelected(item, row); 848 } 849 } 850 }; 851 852 private OnItemSelectedListener mHeaderSelectedListener = new OnItemSelectedListener() { 853 @Override 854 public void onItemSelected(Object item, Row row) { 855 int position = mHeadersSupportFragment.getVerticalGridView().getSelectedPosition(); 856 if (DEBUG) Log.v(TAG, "header selected position " + position); 857 onRowSelected(position); 858 } 859 }; 860 861 private void onRowSelected(int position) { 862 if (position != mSelectedPosition) { 863 mSetSelectionRunnable.mPosition = position; 864 mBrowseFrame.getHandler().post(mSetSelectionRunnable); 865 866 if (getAdapter() == null || getAdapter().size() == 0 || position == 0) { 867 if (!mShowingTitle) { 868 sTransitionHelper.runTransition(mSceneWithTitle, mTitleDownTransition); 869 mShowingTitle = true; 870 } 871 } else if (mShowingTitle) { 872 sTransitionHelper.runTransition(mSceneWithoutTitle, mTitleUpTransition); 873 mShowingTitle = false; 874 } 875 } 876 } 877 878 private class SetSelectionRunnable implements Runnable { 879 int mPosition; 880 boolean mSmooth = true; 881 @Override 882 public void run() { 883 setSelection(mPosition, mSmooth); 884 } 885 } 886 887 private final SetSelectionRunnable mSetSelectionRunnable = new SetSelectionRunnable(); 888 889 private void setSelection(int position, boolean smooth) { 890 if (position != NO_POSITION) { 891 mRowsSupportFragment.setSelectedPosition(position, smooth); 892 mHeadersSupportFragment.setSelectedPosition(position, smooth); 893 } 894 mSelectedPosition = position; 895 } 896 897 /** 898 * Sets the selected row position with smooth animation. 899 */ 900 public void setSelectedPosition(int position) { 901 setSelectedPosition(position, true); 902 } 903 904 /** 905 * Sets the selected row position. 906 */ 907 public void setSelectedPosition(int position, boolean smooth) { 908 mSetSelectionRunnable.mPosition = position; 909 mSetSelectionRunnable.mSmooth = smooth; 910 mBrowseFrame.getHandler().post(mSetSelectionRunnable); 911 } 912 913 @Override 914 public void onStart() { 915 super.onStart(); 916 mHeadersSupportFragment.setWindowAlignmentFromTop(mContainerListAlignTop); 917 mHeadersSupportFragment.setItemAlignment(); 918 mRowsSupportFragment.setWindowAlignmentFromTop(mContainerListAlignTop); 919 mRowsSupportFragment.setItemAlignment(); 920 921 mRowsSupportFragment.setScalePivots(0, mContainerListAlignTop); 922 923 if (mCanShowHeaders && mShowingHeaders && mHeadersSupportFragment.getView() != null) { 924 mHeadersSupportFragment.getView().requestFocus(); 925 } else if ((!mCanShowHeaders || !mShowingHeaders) 926 && mRowsSupportFragment.getView() != null) { 927 mRowsSupportFragment.getView().requestFocus(); 928 } 929 if (mCanShowHeaders) { 930 showHeaders(mShowingHeaders); 931 } 932 if (isEntranceTransitionEnabled()) { 933 setEntranceTransitionStartState(); 934 } 935 } 936 937 @Override 938 public void onPause() { 939 mTitleView.enableAnimation(false); 940 super.onPause(); 941 } 942 943 @Override 944 public void onResume() { 945 super.onResume(); 946 mTitleView.enableAnimation(true); 947 } 948 949 /** 950 * Enable/disable headers transition on back key support. This is enabled by 951 * default. The BrowseSupportFragment will add a back stack entry when headers are 952 * showing. Running a headers transition when the back key is pressed only 953 * works when the headers state is {@link #HEADERS_ENABLED} or 954 * {@link #HEADERS_HIDDEN}. 955 * <p> 956 * NOTE: If an Activity has its own onBackPressed() handling, you must 957 * disable this feature. You may use {@link #startHeadersTransition(boolean)} 958 * and {@link BrowseTransitionListener} in your own back stack handling. 959 */ 960 public final void setHeadersTransitionOnBackEnabled(boolean headersBackStackEnabled) { 961 mHeadersBackStackEnabled = headersBackStackEnabled; 962 } 963 964 /** 965 * Returns true if headers transition on back key support is enabled. 966 */ 967 public final boolean isHeadersTransitionOnBackEnabled() { 968 return mHeadersBackStackEnabled; 969 } 970 971 private void readArguments(Bundle args) { 972 if (args == null) { 973 return; 974 } 975 if (args.containsKey(ARG_TITLE)) { 976 setTitle(args.getString(ARG_TITLE)); 977 } 978 if (args.containsKey(ARG_HEADERS_STATE)) { 979 setHeadersState(args.getInt(ARG_HEADERS_STATE)); 980 } 981 } 982 983 /** 984 * Sets the drawable displayed in the browse fragment title. 985 * 986 * @param drawable The Drawable to display in the browse fragment title. 987 */ 988 public void setBadgeDrawable(Drawable drawable) { 989 if (mBadgeDrawable != drawable) { 990 mBadgeDrawable = drawable; 991 if (mTitleView != null) { 992 mTitleView.setBadgeDrawable(drawable); 993 } 994 } 995 } 996 997 /** 998 * Returns the badge drawable used in the fragment title. 999 */ 1000 public Drawable getBadgeDrawable() { 1001 return mBadgeDrawable; 1002 } 1003 1004 /** 1005 * Sets a title for the browse fragment. 1006 * 1007 * @param title The title of the browse fragment. 1008 */ 1009 public void setTitle(String title) { 1010 mTitle = title; 1011 if (mTitleView != null) { 1012 mTitleView.setTitle(title); 1013 } 1014 } 1015 1016 /** 1017 * Returns the title for the browse fragment. 1018 */ 1019 public String getTitle() { 1020 return mTitle; 1021 } 1022 1023 /** 1024 * Sets the state for the headers column in the browse fragment. Must be one 1025 * of {@link #HEADERS_ENABLED}, {@link #HEADERS_HIDDEN}, or 1026 * {@link #HEADERS_DISABLED}. 1027 * 1028 * @param headersState The state of the headers for the browse fragment. 1029 */ 1030 public void setHeadersState(int headersState) { 1031 if (headersState < HEADERS_ENABLED || headersState > HEADERS_DISABLED) { 1032 throw new IllegalArgumentException("Invalid headers state: " + headersState); 1033 } 1034 if (DEBUG) Log.v(TAG, "setHeadersState " + headersState); 1035 1036 if (headersState != mHeadersState) { 1037 mHeadersState = headersState; 1038 switch (headersState) { 1039 case HEADERS_ENABLED: 1040 mCanShowHeaders = true; 1041 mShowingHeaders = true; 1042 break; 1043 case HEADERS_HIDDEN: 1044 mCanShowHeaders = true; 1045 mShowingHeaders = false; 1046 break; 1047 case HEADERS_DISABLED: 1048 mCanShowHeaders = false; 1049 mShowingHeaders = false; 1050 break; 1051 default: 1052 Log.w(TAG, "Unknown headers state: " + headersState); 1053 break; 1054 } 1055 if (mHeadersSupportFragment != null) { 1056 mHeadersSupportFragment.setHeadersGone(!mCanShowHeaders); 1057 } 1058 } 1059 } 1060 1061 /** 1062 * Returns the state of the headers column in the browse fragment. 1063 */ 1064 public int getHeadersState() { 1065 return mHeadersState; 1066 } 1067 1068 @Override 1069 protected Object createEntranceTransition() { 1070 return sTransitionHelper.loadTransition(getActivity(), 1071 R.transition.lb_browse_entrance_transition); 1072 } 1073 1074 @Override 1075 protected void runEntranceTransition(Object entranceTransition) { 1076 sTransitionHelper.runTransition(mSceneAfterEntranceTransition, 1077 entranceTransition); 1078 } 1079 1080 @Override 1081 protected void onEntranceTransitionStart() { 1082 mHeadersSupportFragment.onTransitionStart(); 1083 mRowsSupportFragment.onTransitionStart(); 1084 } 1085 1086 @Override 1087 protected void onEntranceTransitionEnd() { 1088 mRowsSupportFragment.onTransitionEnd(); 1089 mHeadersSupportFragment.onTransitionEnd(); 1090 } 1091 1092 void setSearchOrbViewOnScreen(boolean onScreen) { 1093 View searchOrbView = mTitleView.getSearchAffordanceView(); 1094 MarginLayoutParams lp = (MarginLayoutParams) searchOrbView.getLayoutParams(); 1095 lp.setMarginStart(onScreen ? 0 : -mContainerListMarginStart); 1096 searchOrbView.setLayoutParams(lp); 1097 } 1098 1099 void setEntranceTransitionStartState() { 1100 setHeadersOnScreen(false); 1101 setSearchOrbViewOnScreen(false); 1102 mRowsSupportFragment.setEntranceTransitionState(false); 1103 } 1104 1105 void setEntranceTransitionEndState() { 1106 setHeadersOnScreen(mShowingHeaders); 1107 setSearchOrbViewOnScreen(true); 1108 mRowsSupportFragment.setEntranceTransitionState(true); 1109 } 1110 1111} 1112 1113