1/* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14package android.support.v17.leanback.app; 15 16import android.support.v17.leanback.R; 17import android.support.v17.leanback.transition.LeanbackTransitionHelper; 18import android.support.v17.leanback.transition.TransitionHelper; 19import android.support.v17.leanback.transition.TransitionListener; 20import android.support.v17.leanback.widget.BrowseFrameLayout; 21import android.support.v17.leanback.widget.HorizontalGridView; 22import android.support.v17.leanback.widget.ItemBridgeAdapter; 23import android.support.v17.leanback.widget.OnItemViewClickedListener; 24import android.support.v17.leanback.widget.OnItemViewSelectedListener; 25import android.support.v17.leanback.widget.Presenter; 26import android.support.v17.leanback.widget.PresenterSelector; 27import android.support.v17.leanback.widget.RowPresenter; 28import android.support.v17.leanback.widget.TitleView; 29import android.support.v17.leanback.widget.VerticalGridView; 30import android.support.v17.leanback.widget.Row; 31import android.support.v17.leanback.widget.ObjectAdapter; 32import android.support.v17.leanback.widget.OnItemSelectedListener; 33import android.support.v17.leanback.widget.OnItemClickedListener; 34import android.support.v17.leanback.widget.SearchOrbView; 35import android.support.v4.view.ViewCompat; 36import android.util.Log; 37import android.app.Activity; 38import android.app.Fragment; 39import android.app.FragmentManager; 40import android.app.FragmentManager.BackStackEntry; 41import android.content.Context; 42import android.content.res.TypedArray; 43import android.os.Bundle; 44import android.view.LayoutInflater; 45import android.view.View; 46import android.view.View.OnClickListener; 47import android.view.ViewGroup; 48import android.view.ViewGroup.MarginLayoutParams; 49import android.view.ViewTreeObserver; 50import android.graphics.Color; 51import android.graphics.Rect; 52import android.graphics.drawable.Drawable; 53 54import static android.support.v7.widget.RecyclerView.NO_POSITION; 55 56/** 57 * A fragment for creating Leanback browse screens. It is composed of a 58 * RowsFragment and a HeadersFragment. 59 * <p> 60 * A BrowseFragment renders the elements of its {@link ObjectAdapter} as a set 61 * of rows in a vertical list. The elements in this adapter must be subclasses 62 * of {@link Row}. 63 * <p> 64 * The HeadersFragment can be set to be either shown or hidden by default, or 65 * may be disabled entirely. See {@link #setHeadersState} for details. 66 * <p> 67 * By default the BrowseFragment includes support for returning to the headers 68 * when the user presses Back. For Activities that customize {@link 69 * android.app.Activity#onBackPressed()}, you must disable this default Back key support by 70 * calling {@link #setHeadersTransitionOnBackEnabled(boolean)} with false and 71 * use {@link BrowseFragment.BrowseTransitionListener} and 72 * {@link #startHeadersTransition(boolean)}. 73 */ 74public class BrowseFragment extends BaseFragment { 75 76 // BUNDLE attribute for saving header show/hide status when backstack is used: 77 static final String HEADER_STACK_INDEX = "headerStackIndex"; 78 // BUNDLE attribute for saving header show/hide status when backstack is not used: 79 static final String HEADER_SHOW = "headerShow"; 80 // BUNDLE attribute for title is showing 81 static final String TITLE_SHOW = "titleShow"; 82 83 final class BackStackListener implements FragmentManager.OnBackStackChangedListener { 84 int mLastEntryCount; 85 int mIndexOfHeadersBackStack; 86 87 BackStackListener() { 88 mLastEntryCount = getFragmentManager().getBackStackEntryCount(); 89 mIndexOfHeadersBackStack = -1; 90 } 91 92 void load(Bundle savedInstanceState) { 93 if (savedInstanceState != null) { 94 mIndexOfHeadersBackStack = savedInstanceState.getInt(HEADER_STACK_INDEX, -1); 95 mShowingHeaders = mIndexOfHeadersBackStack == -1; 96 } else { 97 if (!mShowingHeaders) { 98 getFragmentManager().beginTransaction() 99 .addToBackStack(mWithHeadersBackStackName).commit(); 100 } 101 } 102 } 103 104 void save(Bundle outState) { 105 outState.putInt(HEADER_STACK_INDEX, mIndexOfHeadersBackStack); 106 } 107 108 109 @Override 110 public void onBackStackChanged() { 111 if (getFragmentManager() == null) { 112 Log.w(TAG, "getFragmentManager() is null, stack:", new Exception()); 113 return; 114 } 115 int count = getFragmentManager().getBackStackEntryCount(); 116 // if backstack is growing and last pushed entry is "headers" backstack, 117 // remember the index of the entry. 118 if (count > mLastEntryCount) { 119 BackStackEntry entry = getFragmentManager().getBackStackEntryAt(count - 1); 120 if (mWithHeadersBackStackName.equals(entry.getName())) { 121 mIndexOfHeadersBackStack = count - 1; 122 } 123 } else if (count < mLastEntryCount) { 124 // if popped "headers" backstack, initiate the show header transition if needed 125 if (mIndexOfHeadersBackStack >= count) { 126 mIndexOfHeadersBackStack = -1; 127 if (!mShowingHeaders) { 128 startHeadersTransitionInternal(true); 129 } 130 } 131 } 132 mLastEntryCount = count; 133 } 134 } 135 136 /** 137 * Listener for transitions between browse headers and rows. 138 */ 139 public static class BrowseTransitionListener { 140 /** 141 * Callback when headers transition starts. 142 * 143 * @param withHeaders True if the transition will result in headers 144 * being shown, false otherwise. 145 */ 146 public void onHeadersTransitionStart(boolean withHeaders) { 147 } 148 /** 149 * Callback when headers transition stops. 150 * 151 * @param withHeaders True if the transition will result in headers 152 * being shown, false otherwise. 153 */ 154 public void onHeadersTransitionStop(boolean withHeaders) { 155 } 156 } 157 158 private static final String TAG = "BrowseFragment"; 159 160 private static final String LB_HEADERS_BACKSTACK = "lbHeadersBackStack_"; 161 162 private static boolean DEBUG = false; 163 164 /** The headers fragment is enabled and shown by default. */ 165 public static final int HEADERS_ENABLED = 1; 166 167 /** The headers fragment is enabled and hidden by default. */ 168 public static final int HEADERS_HIDDEN = 2; 169 170 /** The headers fragment is disabled and will never be shown. */ 171 public static final int HEADERS_DISABLED = 3; 172 173 private static final float SLIDE_DISTANCE_FACTOR = 2; 174 175 private RowsFragment mRowsFragment; 176 private HeadersFragment mHeadersFragment; 177 178 private ObjectAdapter mAdapter; 179 180 private String mTitle; 181 private Drawable mBadgeDrawable; 182 private int mHeadersState = HEADERS_ENABLED; 183 private int mBrandColor = Color.TRANSPARENT; 184 private boolean mBrandColorSet; 185 186 private BrowseFrameLayout mBrowseFrame; 187 private TitleView mTitleView; 188 private boolean mShowingTitle = true; 189 private boolean mHeadersBackStackEnabled = true; 190 private String mWithHeadersBackStackName; 191 private boolean mShowingHeaders = true; 192 private boolean mCanShowHeaders = true; 193 private int mContainerListMarginStart; 194 private int mContainerListAlignTop; 195 private boolean mRowScaleEnabled = true; 196 private SearchOrbView.Colors mSearchAffordanceColors; 197 private boolean mSearchAffordanceColorSet; 198 private OnItemSelectedListener mExternalOnItemSelectedListener; 199 private OnClickListener mExternalOnSearchClickedListener; 200 private OnItemClickedListener mOnItemClickedListener; 201 private OnItemViewSelectedListener mExternalOnItemViewSelectedListener; 202 private OnItemViewClickedListener mOnItemViewClickedListener; 203 private int mSelectedPosition = -1; 204 205 private PresenterSelector mHeaderPresenterSelector; 206 207 // transition related: 208 private Object mSceneWithTitle; 209 private Object mSceneWithoutTitle; 210 private Object mSceneWithHeaders; 211 private Object mSceneWithoutHeaders; 212 private Object mSceneAfterEntranceTransition; 213 private Object mTitleUpTransition; 214 private Object mTitleDownTransition; 215 private Object mHeadersTransition; 216 private BackStackListener mBackStackChangedListener; 217 private BrowseTransitionListener mBrowseTransitionListener; 218 219 private static final String ARG_TITLE = BrowseFragment.class.getCanonicalName() + ".title"; 220 private static final String ARG_BADGE_URI = BrowseFragment.class.getCanonicalName() + ".badge"; 221 private static final String ARG_HEADERS_STATE = 222 BrowseFragment.class.getCanonicalName() + ".headersState"; 223 224 /** 225 * Create arguments for a browse fragment. 226 * 227 * @param args The Bundle to place arguments into, or null if the method 228 * should return a new Bundle. 229 * @param title The title of the BrowseFragment. 230 * @param headersState The initial state of the headers of the 231 * BrowseFragment. Must be one of {@link #HEADERS_ENABLED}, {@link 232 * #HEADERS_HIDDEN}, or {@link #HEADERS_DISABLED}. 233 * @return A Bundle with the given arguments for creating a BrowseFragment. 234 */ 235 public static Bundle createArgs(Bundle args, String title, int headersState) { 236 if (args == null) { 237 args = new Bundle(); 238 } 239 args.putString(ARG_TITLE, title); 240 args.putInt(ARG_HEADERS_STATE, headersState); 241 return args; 242 } 243 244 /** 245 * Sets the brand color for the browse fragment. The brand color is used as 246 * the primary color for UI elements in the browse fragment. For example, 247 * the background color of the headers fragment uses the brand color. 248 * 249 * @param color The color to use as the brand color of the fragment. 250 */ 251 public void setBrandColor(int color) { 252 mBrandColor = color; 253 mBrandColorSet = true; 254 255 if (mHeadersFragment != null) { 256 mHeadersFragment.setBackgroundColor(mBrandColor); 257 } 258 } 259 260 /** 261 * Returns the brand color for the browse fragment. 262 * The default is transparent. 263 */ 264 public int getBrandColor() { 265 return mBrandColor; 266 } 267 268 /** 269 * Sets the adapter containing the rows for the fragment. 270 * 271 * <p>The items referenced by the adapter must be be derived from 272 * {@link Row}. These rows will be used by the rows fragment and the headers 273 * fragment (if not disabled) to render the browse rows. 274 * 275 * @param adapter An ObjectAdapter for the browse rows. All items must 276 * derive from {@link Row}. 277 */ 278 public void setAdapter(ObjectAdapter adapter) { 279 mAdapter = adapter; 280 if (mRowsFragment != null) { 281 mRowsFragment.setAdapter(adapter); 282 mHeadersFragment.setAdapter(adapter); 283 } 284 } 285 286 /** 287 * Returns the adapter containing the rows for the fragment. 288 */ 289 public ObjectAdapter getAdapter() { 290 return mAdapter; 291 } 292 293 /** 294 * Sets an item selection listener. This listener will be called when an 295 * item or row is selected by a user. 296 * 297 * @param listener The listener to call when an item or row is selected. 298 * @deprecated Use {@link #setOnItemViewSelectedListener(OnItemViewSelectedListener)} 299 */ 300 public void setOnItemSelectedListener(OnItemSelectedListener listener) { 301 mExternalOnItemSelectedListener = listener; 302 } 303 304 /** 305 * Sets an item selection listener. 306 */ 307 public void setOnItemViewSelectedListener(OnItemViewSelectedListener listener) { 308 mExternalOnItemViewSelectedListener = listener; 309 } 310 311 /** 312 * Returns an item selection listener. 313 */ 314 public OnItemViewSelectedListener getOnItemViewSelectedListener() { 315 return mExternalOnItemViewSelectedListener; 316 } 317 318 /** 319 * Sets an item clicked listener on the fragment. 320 * 321 * <p>OnItemClickedListener will override {@link View.OnClickListener} that 322 * an item presenter may set during 323 * {@link Presenter#onCreateViewHolder(ViewGroup)}. So in general, you 324 * should choose to use an {@link OnItemClickedListener} or a 325 * {@link View.OnClickListener} on your item views, but not both. 326 * 327 * @param listener The listener to call when an item is clicked. 328 * @deprecated Use {@link #setOnItemViewClickedListener(OnItemViewClickedListener)} 329 */ 330 public void setOnItemClickedListener(OnItemClickedListener listener) { 331 mOnItemClickedListener = listener; 332 if (mRowsFragment != null) { 333 mRowsFragment.setOnItemClickedListener(listener); 334 } 335 } 336 337 /** 338 * Returns the item clicked listener. 339 * @deprecated Use {@link #getOnItemViewClickedListener()} 340 */ 341 public OnItemClickedListener getOnItemClickedListener() { 342 return mOnItemClickedListener; 343 } 344 345 /** 346 * Sets an item clicked listener on the fragment. 347 * OnItemViewClickedListener will override {@link View.OnClickListener} that 348 * item presenter sets during {@link Presenter#onCreateViewHolder(ViewGroup)}. 349 * So in general, developer should choose one of the listeners but not both. 350 */ 351 public void setOnItemViewClickedListener(OnItemViewClickedListener listener) { 352 mOnItemViewClickedListener = listener; 353 if (mRowsFragment != null) { 354 mRowsFragment.setOnItemViewClickedListener(listener); 355 } 356 } 357 358 /** 359 * Returns the item Clicked listener. 360 */ 361 public OnItemViewClickedListener getOnItemViewClickedListener() { 362 return mOnItemViewClickedListener; 363 } 364 365 /** 366 * Sets a click listener for the search affordance. 367 * 368 * <p>The presence of a listener will change the visibility of the search 369 * affordance in the fragment title. When set to non-null, the title will 370 * contain an element that a user may click to begin a search. 371 * 372 * <p>The listener's {@link View.OnClickListener#onClick onClick} method 373 * will be invoked when the user clicks on the search element. 374 * 375 * @param listener The listener to call when the search element is clicked. 376 */ 377 public void setOnSearchClickedListener(View.OnClickListener listener) { 378 mExternalOnSearchClickedListener = listener; 379 if (mTitleView != null) { 380 mTitleView.setOnSearchClickedListener(listener); 381 } 382 } 383 384 /** 385 * Sets the {@link SearchOrbView.Colors} used to draw the search affordance. 386 */ 387 public void setSearchAffordanceColors(SearchOrbView.Colors colors) { 388 mSearchAffordanceColors = colors; 389 mSearchAffordanceColorSet = true; 390 if (mTitleView != null) { 391 mTitleView.setSearchAffordanceColors(mSearchAffordanceColors); 392 } 393 } 394 395 /** 396 * Returns the {@link SearchOrbView.Colors} used to draw the search affordance. 397 */ 398 public SearchOrbView.Colors getSearchAffordanceColors() { 399 if (mSearchAffordanceColorSet) { 400 return mSearchAffordanceColors; 401 } 402 if (mTitleView == null) { 403 throw new IllegalStateException("Fragment views not yet created"); 404 } 405 return mTitleView.getSearchAffordanceColors(); 406 } 407 408 /** 409 * Sets the color used to draw the search affordance. 410 * A default brighter color will be set by the framework. 411 * 412 * @param color The color to use for the search affordance. 413 */ 414 public void setSearchAffordanceColor(int color) { 415 setSearchAffordanceColors(new SearchOrbView.Colors(color)); 416 } 417 418 /** 419 * Returns the color used to draw the search affordance. 420 */ 421 public int getSearchAffordanceColor() { 422 return getSearchAffordanceColors().color; 423 } 424 425 /** 426 * Start a headers transition. 427 * 428 * <p>This method will begin a transition to either show or hide the 429 * headers, depending on the value of withHeaders. If headers are disabled 430 * for this browse fragment, this method will throw an exception. 431 * 432 * @param withHeaders True if the headers should transition to being shown, 433 * false if the transition should result in headers being hidden. 434 */ 435 public void startHeadersTransition(boolean withHeaders) { 436 if (!mCanShowHeaders) { 437 throw new IllegalStateException("Cannot start headers transition"); 438 } 439 if (isInHeadersTransition() || mShowingHeaders == withHeaders) { 440 return; 441 } 442 startHeadersTransitionInternal(withHeaders); 443 } 444 445 /** 446 * Returns true if the headers transition is currently running. 447 */ 448 public boolean isInHeadersTransition() { 449 return mHeadersTransition != null; 450 } 451 452 /** 453 * Returns true if headers are shown. 454 */ 455 public boolean isShowingHeaders() { 456 return mShowingHeaders; 457 } 458 459 /** 460 * Set a listener for browse fragment transitions. 461 * 462 * @param listener The listener to call when a browse headers transition 463 * begins or ends. 464 */ 465 public void setBrowseTransitionListener(BrowseTransitionListener listener) { 466 mBrowseTransitionListener = listener; 467 } 468 469 /** 470 * Enables scaling of rows when headers are present. 471 * By default enabled to increase density. 472 * 473 * @param enable true to enable row scaling 474 */ 475 public void enableRowScaling(boolean enable) { 476 mRowScaleEnabled = enable; 477 if (mRowsFragment != null) { 478 mRowsFragment.enableRowScaling(mRowScaleEnabled); 479 } 480 } 481 482 private void startHeadersTransitionInternal(final boolean withHeaders) { 483 if (getFragmentManager().isDestroyed()) { 484 return; 485 } 486 mShowingHeaders = withHeaders; 487 mRowsFragment.onExpandTransitionStart(!withHeaders, new Runnable() { 488 @Override 489 public void run() { 490 mHeadersFragment.onTransitionStart(); 491 createHeadersTransition(); 492 if (mBrowseTransitionListener != null) { 493 mBrowseTransitionListener.onHeadersTransitionStart(withHeaders); 494 } 495 sTransitionHelper.runTransition(withHeaders ? mSceneWithHeaders : mSceneWithoutHeaders, 496 mHeadersTransition); 497 if (mHeadersBackStackEnabled) { 498 if (!withHeaders) { 499 getFragmentManager().beginTransaction() 500 .addToBackStack(mWithHeadersBackStackName).commit(); 501 } else { 502 int index = mBackStackChangedListener.mIndexOfHeadersBackStack; 503 if (index >= 0) { 504 BackStackEntry entry = getFragmentManager().getBackStackEntryAt(index); 505 getFragmentManager().popBackStackImmediate(entry.getId(), 506 FragmentManager.POP_BACK_STACK_INCLUSIVE); 507 } 508 } 509 } 510 } 511 }); 512 } 513 514 private boolean isVerticalScrolling() { 515 // don't run transition 516 return mHeadersFragment.getVerticalGridView().getScrollState() 517 != HorizontalGridView.SCROLL_STATE_IDLE 518 || mRowsFragment.getVerticalGridView().getScrollState() 519 != HorizontalGridView.SCROLL_STATE_IDLE; 520 } 521 522 private final BrowseFrameLayout.OnFocusSearchListener mOnFocusSearchListener = 523 new BrowseFrameLayout.OnFocusSearchListener() { 524 @Override 525 public View onFocusSearch(View focused, int direction) { 526 // if headers is running transition, focus stays 527 if (mCanShowHeaders && isInHeadersTransition()) { 528 return focused; 529 } 530 if (DEBUG) Log.v(TAG, "onFocusSearch focused " + focused + " + direction " + direction); 531 532 final View searchOrbView = mTitleView.getSearchAffordanceView(); 533 if (focused == searchOrbView && direction == View.FOCUS_DOWN) { 534 return mCanShowHeaders && mShowingHeaders ? 535 mHeadersFragment.getVerticalGridView() : 536 mRowsFragment.getVerticalGridView(); 537 } else if (focused != searchOrbView && searchOrbView.getVisibility() == View.VISIBLE 538 && direction == View.FOCUS_UP) { 539 return searchOrbView; 540 } 541 542 // If headers fragment is disabled, just return null. 543 if (!mCanShowHeaders) { 544 return null; 545 } 546 boolean isRtl = ViewCompat.getLayoutDirection(focused) == View.LAYOUT_DIRECTION_RTL; 547 int towardStart = isRtl ? View.FOCUS_RIGHT : View.FOCUS_LEFT; 548 int towardEnd = isRtl ? View.FOCUS_LEFT : View.FOCUS_RIGHT; 549 if (direction == towardStart) { 550 if (isVerticalScrolling() || mShowingHeaders) { 551 return focused; 552 } 553 return mHeadersFragment.getVerticalGridView(); 554 } else if (direction == towardEnd) { 555 if (isVerticalScrolling() || !mShowingHeaders) { 556 return focused; 557 } 558 return mRowsFragment.getVerticalGridView(); 559 } else { 560 return null; 561 } 562 } 563 }; 564 565 private final BrowseFrameLayout.OnChildFocusListener mOnChildFocusListener = 566 new BrowseFrameLayout.OnChildFocusListener() { 567 568 @Override 569 public boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { 570 if (getChildFragmentManager().isDestroyed()) { 571 return true; 572 } 573 // Make sure not changing focus when requestFocus() is called. 574 if (mCanShowHeaders && mShowingHeaders) { 575 if (mHeadersFragment != null && mHeadersFragment.getView() != null && 576 mHeadersFragment.getView().requestFocus(direction, previouslyFocusedRect)) { 577 return true; 578 } 579 } 580 if (mRowsFragment != null && mRowsFragment.getView() != null && 581 mRowsFragment.getView().requestFocus(direction, previouslyFocusedRect)) { 582 return true; 583 } 584 if (mTitleView != null && 585 mTitleView.requestFocus(direction, previouslyFocusedRect)) { 586 return true; 587 } 588 return false; 589 }; 590 591 @Override 592 public void onRequestChildFocus(View child, View focused) { 593 if (getChildFragmentManager().isDestroyed()) { 594 return; 595 } 596 if (!mCanShowHeaders || isInHeadersTransition()) return; 597 int childId = child.getId(); 598 if (childId == R.id.browse_container_dock && mShowingHeaders) { 599 startHeadersTransitionInternal(false); 600 } else if (childId == R.id.browse_headers_dock && !mShowingHeaders) { 601 startHeadersTransitionInternal(true); 602 } 603 } 604 }; 605 606 @Override 607 public void onSaveInstanceState(Bundle outState) { 608 if (mBackStackChangedListener != null) { 609 mBackStackChangedListener.save(outState); 610 } else { 611 outState.putBoolean(HEADER_SHOW, mShowingHeaders); 612 } 613 outState.putBoolean(TITLE_SHOW, mShowingTitle); 614 } 615 616 @Override 617 public void onCreate(Bundle savedInstanceState) { 618 super.onCreate(savedInstanceState); 619 TypedArray ta = getActivity().obtainStyledAttributes(R.styleable.LeanbackTheme); 620 mContainerListMarginStart = (int) ta.getDimension( 621 R.styleable.LeanbackTheme_browseRowsMarginStart, 0); 622 mContainerListAlignTop = (int) ta.getDimension( 623 R.styleable.LeanbackTheme_browseRowsMarginTop, 0); 624 ta.recycle(); 625 626 readArguments(getArguments()); 627 628 if (mCanShowHeaders) { 629 if (mHeadersBackStackEnabled) { 630 mWithHeadersBackStackName = LB_HEADERS_BACKSTACK + this; 631 mBackStackChangedListener = new BackStackListener(); 632 getFragmentManager().addOnBackStackChangedListener(mBackStackChangedListener); 633 mBackStackChangedListener.load(savedInstanceState); 634 } else { 635 if (savedInstanceState != null) { 636 mShowingHeaders = savedInstanceState.getBoolean(HEADER_SHOW); 637 } 638 } 639 } 640 641 } 642 643 @Override 644 public void onDestroy() { 645 if (mBackStackChangedListener != null) { 646 getFragmentManager().removeOnBackStackChangedListener(mBackStackChangedListener); 647 } 648 super.onDestroy(); 649 } 650 651 @Override 652 public View onCreateView(LayoutInflater inflater, ViewGroup container, 653 Bundle savedInstanceState) { 654 if (getChildFragmentManager().findFragmentById(R.id.browse_container_dock) == null) { 655 mRowsFragment = new RowsFragment(); 656 mHeadersFragment = new HeadersFragment(); 657 getChildFragmentManager().beginTransaction() 658 .replace(R.id.browse_headers_dock, mHeadersFragment) 659 .replace(R.id.browse_container_dock, mRowsFragment).commit(); 660 } else { 661 mHeadersFragment = (HeadersFragment) getChildFragmentManager() 662 .findFragmentById(R.id.browse_headers_dock); 663 mRowsFragment = (RowsFragment) getChildFragmentManager() 664 .findFragmentById(R.id.browse_container_dock); 665 } 666 667 mHeadersFragment.setHeadersGone(!mCanShowHeaders); 668 669 mRowsFragment.setAdapter(mAdapter); 670 if (mHeaderPresenterSelector != null) { 671 mHeadersFragment.setPresenterSelector(mHeaderPresenterSelector); 672 } 673 mHeadersFragment.setAdapter(mAdapter); 674 675 mRowsFragment.enableRowScaling(mRowScaleEnabled); 676 mRowsFragment.setOnItemSelectedListener(mRowSelectedListener); 677 mRowsFragment.setOnItemViewSelectedListener(mRowViewSelectedListener); 678 mHeadersFragment.setOnItemSelectedListener(mHeaderSelectedListener); 679 mHeadersFragment.setOnHeaderClickedListener(mHeaderClickedListener); 680 mRowsFragment.setOnItemClickedListener(mOnItemClickedListener); 681 mRowsFragment.setOnItemViewClickedListener(mOnItemViewClickedListener); 682 683 View root = inflater.inflate(R.layout.lb_browse_fragment, container, false); 684 685 mBrowseFrame = (BrowseFrameLayout) root.findViewById(R.id.browse_frame); 686 mBrowseFrame.setOnFocusSearchListener(mOnFocusSearchListener); 687 mBrowseFrame.setOnChildFocusListener(mOnChildFocusListener); 688 689 mTitleView = (TitleView) root.findViewById(R.id.browse_title_group); 690 mTitleView.setTitle(mTitle); 691 mTitleView.setBadgeDrawable(mBadgeDrawable); 692 if (mSearchAffordanceColorSet) { 693 mTitleView.setSearchAffordanceColors(mSearchAffordanceColors); 694 } 695 if (mExternalOnSearchClickedListener != null) { 696 mTitleView.setOnSearchClickedListener(mExternalOnSearchClickedListener); 697 } 698 699 if (mBrandColorSet) { 700 mHeadersFragment.setBackgroundColor(mBrandColor); 701 } 702 703 mSceneWithTitle = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 704 @Override 705 public void run() { 706 mTitleView.setVisibility(View.VISIBLE); 707 } 708 }); 709 mSceneWithoutTitle = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 710 @Override 711 public void run() { 712 mTitleView.setVisibility(View.INVISIBLE); 713 } 714 }); 715 mSceneWithHeaders = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 716 @Override 717 public void run() { 718 showHeaders(true); 719 } 720 }); 721 mSceneWithoutHeaders = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 722 @Override 723 public void run() { 724 showHeaders(false); 725 } 726 }); 727 mSceneAfterEntranceTransition = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 728 @Override 729 public void run() { 730 setEntranceTransitionEndState(); 731 } 732 }); 733 Context context = getActivity(); 734 mTitleUpTransition = LeanbackTransitionHelper.loadTitleOutTransition(context, 735 sTransitionHelper); 736 mTitleDownTransition = LeanbackTransitionHelper.loadTitleInTransition(context, 737 sTransitionHelper); 738 739 if (savedInstanceState != null) { 740 mShowingTitle = savedInstanceState.getBoolean(TITLE_SHOW); 741 } 742 mTitleView.setVisibility(mShowingTitle ? View.VISIBLE: View.INVISIBLE); 743 744 return root; 745 } 746 747 private void createHeadersTransition() { 748 mHeadersTransition = sTransitionHelper.loadTransition(getActivity(), 749 mShowingHeaders ? 750 R.transition.lb_browse_headers_in : R.transition.lb_browse_headers_out); 751 752 sTransitionHelper.setTransitionListener(mHeadersTransition, new TransitionListener() { 753 @Override 754 public void onTransitionStart(Object transition) { 755 } 756 @Override 757 public void onTransitionEnd(Object transition) { 758 mHeadersTransition = null; 759 mRowsFragment.onTransitionEnd(); 760 mHeadersFragment.onTransitionEnd(); 761 if (mShowingHeaders) { 762 VerticalGridView headerGridView = mHeadersFragment.getVerticalGridView(); 763 if (headerGridView != null && !headerGridView.hasFocus()) { 764 headerGridView.requestFocus(); 765 } 766 } else { 767 VerticalGridView rowsGridView = mRowsFragment.getVerticalGridView(); 768 if (rowsGridView != null && !rowsGridView.hasFocus()) { 769 rowsGridView.requestFocus(); 770 } 771 } 772 if (mBrowseTransitionListener != null) { 773 mBrowseTransitionListener.onHeadersTransitionStop(mShowingHeaders); 774 } 775 } 776 }); 777 } 778 779 /** 780 * Sets the {@link PresenterSelector} used to render the row headers. 781 * 782 * @param headerPresenterSelector The PresenterSelector that will determine 783 * the Presenter for each row header. 784 */ 785 public void setHeaderPresenterSelector(PresenterSelector headerPresenterSelector) { 786 mHeaderPresenterSelector = headerPresenterSelector; 787 if (mHeadersFragment != null) { 788 mHeadersFragment.setPresenterSelector(mHeaderPresenterSelector); 789 } 790 } 791 792 private void setRowsAlignedLeft(boolean alignLeft) { 793 MarginLayoutParams lp; 794 View containerList; 795 containerList = mRowsFragment.getView(); 796 lp = (MarginLayoutParams) containerList.getLayoutParams(); 797 lp.setMarginStart(alignLeft ? 0 : mContainerListMarginStart); 798 containerList.setLayoutParams(lp); 799 } 800 801 private void setHeadersOnScreen(boolean onScreen) { 802 MarginLayoutParams lp; 803 View containerList; 804 containerList = mHeadersFragment.getView(); 805 lp = (MarginLayoutParams) containerList.getLayoutParams(); 806 lp.setMarginStart(onScreen ? 0 : -mContainerListMarginStart); 807 containerList.setLayoutParams(lp); 808 } 809 810 private void showHeaders(boolean show) { 811 if (DEBUG) Log.v(TAG, "showHeaders " + show); 812 mHeadersFragment.setHeadersEnabled(show); 813 setHeadersOnScreen(show); 814 setRowsAlignedLeft(!show); 815 mRowsFragment.setExpand(!show); 816 } 817 818 private HeadersFragment.OnHeaderClickedListener mHeaderClickedListener = 819 new HeadersFragment.OnHeaderClickedListener() { 820 @Override 821 public void onHeaderClicked() { 822 if (!mCanShowHeaders || !mShowingHeaders || isInHeadersTransition()) { 823 return; 824 } 825 startHeadersTransitionInternal(false); 826 mRowsFragment.getVerticalGridView().requestFocus(); 827 } 828 }; 829 830 private OnItemViewSelectedListener mRowViewSelectedListener = new OnItemViewSelectedListener() { 831 @Override 832 public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item, 833 RowPresenter.ViewHolder rowViewHolder, Row row) { 834 int position = mRowsFragment.getVerticalGridView().getSelectedPosition(); 835 if (DEBUG) Log.v(TAG, "row selected position " + position); 836 onRowSelected(position); 837 if (mExternalOnItemViewSelectedListener != null) { 838 mExternalOnItemViewSelectedListener.onItemSelected(itemViewHolder, item, 839 rowViewHolder, row); 840 } 841 } 842 }; 843 844 private OnItemSelectedListener mRowSelectedListener = new OnItemSelectedListener() { 845 @Override 846 public void onItemSelected(Object item, Row row) { 847 if (mExternalOnItemSelectedListener != null) { 848 mExternalOnItemSelectedListener.onItemSelected(item, row); 849 } 850 } 851 }; 852 853 private OnItemSelectedListener mHeaderSelectedListener = new OnItemSelectedListener() { 854 @Override 855 public void onItemSelected(Object item, Row row) { 856 int position = mHeadersFragment.getVerticalGridView().getSelectedPosition(); 857 if (DEBUG) Log.v(TAG, "header selected position " + position); 858 onRowSelected(position); 859 } 860 }; 861 862 private void onRowSelected(int position) { 863 if (position != mSelectedPosition) { 864 mSetSelectionRunnable.mPosition = position; 865 mBrowseFrame.getHandler().post(mSetSelectionRunnable); 866 867 if (getAdapter() == null || getAdapter().size() == 0 || position == 0) { 868 if (!mShowingTitle) { 869 sTransitionHelper.runTransition(mSceneWithTitle, mTitleDownTransition); 870 mShowingTitle = true; 871 } 872 } else if (mShowingTitle) { 873 sTransitionHelper.runTransition(mSceneWithoutTitle, mTitleUpTransition); 874 mShowingTitle = false; 875 } 876 } 877 } 878 879 private class SetSelectionRunnable implements Runnable { 880 int mPosition; 881 boolean mSmooth = true; 882 @Override 883 public void run() { 884 setSelection(mPosition, mSmooth); 885 } 886 } 887 888 private final SetSelectionRunnable mSetSelectionRunnable = new SetSelectionRunnable(); 889 890 private void setSelection(int position, boolean smooth) { 891 if (position != NO_POSITION) { 892 mRowsFragment.setSelectedPosition(position, smooth); 893 mHeadersFragment.setSelectedPosition(position, smooth); 894 } 895 mSelectedPosition = position; 896 } 897 898 /** 899 * Sets the selected row position with smooth animation. 900 */ 901 public void setSelectedPosition(int position) { 902 setSelectedPosition(position, true); 903 } 904 905 /** 906 * Sets the selected row position. 907 */ 908 public void setSelectedPosition(int position, boolean smooth) { 909 mSetSelectionRunnable.mPosition = position; 910 mSetSelectionRunnable.mSmooth = smooth; 911 mBrowseFrame.getHandler().post(mSetSelectionRunnable); 912 } 913 914 @Override 915 public void onStart() { 916 super.onStart(); 917 mHeadersFragment.setWindowAlignmentFromTop(mContainerListAlignTop); 918 mHeadersFragment.setItemAlignment(); 919 mRowsFragment.setWindowAlignmentFromTop(mContainerListAlignTop); 920 mRowsFragment.setItemAlignment(); 921 922 mRowsFragment.setScalePivots(0, mContainerListAlignTop); 923 924 if (mCanShowHeaders && mShowingHeaders && mHeadersFragment.getView() != null) { 925 mHeadersFragment.getView().requestFocus(); 926 } else if ((!mCanShowHeaders || !mShowingHeaders) 927 && mRowsFragment.getView() != null) { 928 mRowsFragment.getView().requestFocus(); 929 } 930 if (mCanShowHeaders) { 931 showHeaders(mShowingHeaders); 932 } 933 if (isEntranceTransitionEnabled()) { 934 setEntranceTransitionStartState(); 935 } 936 } 937 938 @Override 939 public void onPause() { 940 mTitleView.enableAnimation(false); 941 super.onPause(); 942 } 943 944 @Override 945 public void onResume() { 946 super.onResume(); 947 mTitleView.enableAnimation(true); 948 } 949 950 /** 951 * Enable/disable headers transition on back key support. This is enabled by 952 * default. The BrowseFragment will add a back stack entry when headers are 953 * showing. Running a headers transition when the back key is pressed only 954 * works when the headers state is {@link #HEADERS_ENABLED} or 955 * {@link #HEADERS_HIDDEN}. 956 * <p> 957 * NOTE: If an Activity has its own onBackPressed() handling, you must 958 * disable this feature. You may use {@link #startHeadersTransition(boolean)} 959 * and {@link BrowseTransitionListener} in your own back stack handling. 960 */ 961 public final void setHeadersTransitionOnBackEnabled(boolean headersBackStackEnabled) { 962 mHeadersBackStackEnabled = headersBackStackEnabled; 963 } 964 965 /** 966 * Returns true if headers transition on back key support is enabled. 967 */ 968 public final boolean isHeadersTransitionOnBackEnabled() { 969 return mHeadersBackStackEnabled; 970 } 971 972 private void readArguments(Bundle args) { 973 if (args == null) { 974 return; 975 } 976 if (args.containsKey(ARG_TITLE)) { 977 setTitle(args.getString(ARG_TITLE)); 978 } 979 if (args.containsKey(ARG_HEADERS_STATE)) { 980 setHeadersState(args.getInt(ARG_HEADERS_STATE)); 981 } 982 } 983 984 /** 985 * Sets the drawable displayed in the browse fragment title. 986 * 987 * @param drawable The Drawable to display in the browse fragment title. 988 */ 989 public void setBadgeDrawable(Drawable drawable) { 990 if (mBadgeDrawable != drawable) { 991 mBadgeDrawable = drawable; 992 if (mTitleView != null) { 993 mTitleView.setBadgeDrawable(drawable); 994 } 995 } 996 } 997 998 /** 999 * Returns the badge drawable used in the fragment title. 1000 */ 1001 public Drawable getBadgeDrawable() { 1002 return mBadgeDrawable; 1003 } 1004 1005 /** 1006 * Sets a title for the browse fragment. 1007 * 1008 * @param title The title of the browse fragment. 1009 */ 1010 public void setTitle(String title) { 1011 mTitle = title; 1012 if (mTitleView != null) { 1013 mTitleView.setTitle(title); 1014 } 1015 } 1016 1017 /** 1018 * Returns the title for the browse fragment. 1019 */ 1020 public String getTitle() { 1021 return mTitle; 1022 } 1023 1024 /** 1025 * Sets the state for the headers column in the browse fragment. Must be one 1026 * of {@link #HEADERS_ENABLED}, {@link #HEADERS_HIDDEN}, or 1027 * {@link #HEADERS_DISABLED}. 1028 * 1029 * @param headersState The state of the headers for the browse fragment. 1030 */ 1031 public void setHeadersState(int headersState) { 1032 if (headersState < HEADERS_ENABLED || headersState > HEADERS_DISABLED) { 1033 throw new IllegalArgumentException("Invalid headers state: " + headersState); 1034 } 1035 if (DEBUG) Log.v(TAG, "setHeadersState " + headersState); 1036 1037 if (headersState != mHeadersState) { 1038 mHeadersState = headersState; 1039 switch (headersState) { 1040 case HEADERS_ENABLED: 1041 mCanShowHeaders = true; 1042 mShowingHeaders = true; 1043 break; 1044 case HEADERS_HIDDEN: 1045 mCanShowHeaders = true; 1046 mShowingHeaders = false; 1047 break; 1048 case HEADERS_DISABLED: 1049 mCanShowHeaders = false; 1050 mShowingHeaders = false; 1051 break; 1052 default: 1053 Log.w(TAG, "Unknown headers state: " + headersState); 1054 break; 1055 } 1056 if (mHeadersFragment != null) { 1057 mHeadersFragment.setHeadersGone(!mCanShowHeaders); 1058 } 1059 } 1060 } 1061 1062 /** 1063 * Returns the state of the headers column in the browse fragment. 1064 */ 1065 public int getHeadersState() { 1066 return mHeadersState; 1067 } 1068 1069 @Override 1070 protected Object createEntranceTransition() { 1071 return sTransitionHelper.loadTransition(getActivity(), 1072 R.transition.lb_browse_entrance_transition); 1073 } 1074 1075 @Override 1076 protected void runEntranceTransition(Object entranceTransition) { 1077 sTransitionHelper.runTransition(mSceneAfterEntranceTransition, 1078 entranceTransition); 1079 } 1080 1081 @Override 1082 protected void onEntranceTransitionStart() { 1083 mHeadersFragment.onTransitionStart(); 1084 mRowsFragment.onTransitionStart(); 1085 } 1086 1087 @Override 1088 protected void onEntranceTransitionEnd() { 1089 mRowsFragment.onTransitionEnd(); 1090 mHeadersFragment.onTransitionEnd(); 1091 } 1092 1093 void setSearchOrbViewOnScreen(boolean onScreen) { 1094 View searchOrbView = mTitleView.getSearchAffordanceView(); 1095 MarginLayoutParams lp = (MarginLayoutParams) searchOrbView.getLayoutParams(); 1096 lp.setMarginStart(onScreen ? 0 : -mContainerListMarginStart); 1097 searchOrbView.setLayoutParams(lp); 1098 } 1099 1100 void setEntranceTransitionStartState() { 1101 setHeadersOnScreen(false); 1102 setSearchOrbViewOnScreen(false); 1103 mRowsFragment.setEntranceTransitionState(false); 1104 } 1105 1106 void setEntranceTransitionEndState() { 1107 setHeadersOnScreen(mShowingHeaders); 1108 setSearchOrbViewOnScreen(true); 1109 mRowsFragment.setEntranceTransitionState(true); 1110 } 1111 1112} 1113 1114