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.LeanbackTransitionHelper; 20import android.support.v17.leanback.transition.TransitionHelper; 21import android.support.v17.leanback.transition.TransitionListener; 22import android.support.v17.leanback.widget.BrowseFrameLayout; 23import android.support.v17.leanback.widget.HorizontalGridView; 24import android.support.v17.leanback.widget.ItemBridgeAdapter; 25import android.support.v17.leanback.widget.OnItemViewClickedListener; 26import android.support.v17.leanback.widget.OnItemViewSelectedListener; 27import android.support.v17.leanback.widget.Presenter; 28import android.support.v17.leanback.widget.PresenterSelector; 29import android.support.v17.leanback.widget.RowPresenter; 30import android.support.v17.leanback.widget.TitleView; 31import android.support.v17.leanback.widget.VerticalGridView; 32import android.support.v17.leanback.widget.Row; 33import android.support.v17.leanback.widget.ObjectAdapter; 34import android.support.v17.leanback.widget.OnItemSelectedListener; 35import android.support.v17.leanback.widget.OnItemClickedListener; 36import android.support.v17.leanback.widget.SearchOrbView; 37import android.support.v4.view.ViewCompat; 38import android.util.Log; 39import android.support.v4.app.FragmentActivity; 40import android.support.v4.app.Fragment; 41import android.support.v4.app.FragmentManager; 42import android.support.v4.app.FragmentManager.BackStackEntry; 43import android.content.Context; 44import android.content.res.TypedArray; 45import android.os.Bundle; 46import android.view.LayoutInflater; 47import android.view.View; 48import android.view.View.OnClickListener; 49import android.view.ViewGroup; 50import android.view.ViewGroup.MarginLayoutParams; 51import android.view.ViewTreeObserver; 52import android.graphics.Color; 53import android.graphics.Rect; 54import android.graphics.drawable.Drawable; 55 56import static android.support.v7.widget.RecyclerView.NO_POSITION; 57 58/** 59 * A fragment for creating Leanback browse screens. It is composed of a 60 * RowsSupportFragment and a HeadersSupportFragment. 61 * <p> 62 * A BrowseSupportFragment renders the elements of its {@link ObjectAdapter} as a set 63 * of rows in a vertical list. The elements in this adapter must be subclasses 64 * of {@link Row}. 65 * <p> 66 * The HeadersSupportFragment can be set to be either shown or hidden by default, or 67 * may be disabled entirely. See {@link #setHeadersState} for details. 68 * <p> 69 * By default the BrowseSupportFragment includes support for returning to the headers 70 * when the user presses Back. For Activities that customize {@link 71 * android.support.v4.app.FragmentActivity#onBackPressed()}, you must disable this default Back key support by 72 * calling {@link #setHeadersTransitionOnBackEnabled(boolean)} with false and 73 * use {@link BrowseSupportFragment.BrowseTransitionListener} and 74 * {@link #startHeadersTransition(boolean)}. 75 */ 76public class BrowseSupportFragment extends BaseSupportFragment { 77 78 // BUNDLE attribute for saving header show/hide status when backstack is used: 79 static final String HEADER_STACK_INDEX = "headerStackIndex"; 80 // BUNDLE attribute for saving header show/hide status when backstack is not used: 81 static final String HEADER_SHOW = "headerShow"; 82 // BUNDLE attribute for title is showing 83 static final String TITLE_SHOW = "titleShow"; 84 85 final class BackStackListener implements FragmentManager.OnBackStackChangedListener { 86 int mLastEntryCount; 87 int mIndexOfHeadersBackStack; 88 89 BackStackListener() { 90 mLastEntryCount = getFragmentManager().getBackStackEntryCount(); 91 mIndexOfHeadersBackStack = -1; 92 } 93 94 void load(Bundle savedInstanceState) { 95 if (savedInstanceState != null) { 96 mIndexOfHeadersBackStack = savedInstanceState.getInt(HEADER_STACK_INDEX, -1); 97 mShowingHeaders = mIndexOfHeadersBackStack == -1; 98 } else { 99 if (!mShowingHeaders) { 100 getFragmentManager().beginTransaction() 101 .addToBackStack(mWithHeadersBackStackName).commit(); 102 } 103 } 104 } 105 106 void save(Bundle outState) { 107 outState.putInt(HEADER_STACK_INDEX, mIndexOfHeadersBackStack); 108 } 109 110 111 @Override 112 public void onBackStackChanged() { 113 if (getFragmentManager() == null) { 114 Log.w(TAG, "getFragmentManager() is null, stack:", new Exception()); 115 return; 116 } 117 int count = getFragmentManager().getBackStackEntryCount(); 118 // if backstack is growing and last pushed entry is "headers" backstack, 119 // remember the index of the entry. 120 if (count > mLastEntryCount) { 121 BackStackEntry entry = getFragmentManager().getBackStackEntryAt(count - 1); 122 if (mWithHeadersBackStackName.equals(entry.getName())) { 123 mIndexOfHeadersBackStack = count - 1; 124 } 125 } else if (count < mLastEntryCount) { 126 // if popped "headers" backstack, initiate the show header transition if needed 127 if (mIndexOfHeadersBackStack >= count) { 128 mIndexOfHeadersBackStack = -1; 129 if (!mShowingHeaders) { 130 startHeadersTransitionInternal(true); 131 } 132 } 133 } 134 mLastEntryCount = count; 135 } 136 } 137 138 /** 139 * Listener for transitions between browse headers and rows. 140 */ 141 public static class BrowseTransitionListener { 142 /** 143 * Callback when headers transition starts. 144 * 145 * @param withHeaders True if the transition will result in headers 146 * being shown, false otherwise. 147 */ 148 public void onHeadersTransitionStart(boolean withHeaders) { 149 } 150 /** 151 * Callback when headers transition stops. 152 * 153 * @param withHeaders True if the transition will result in headers 154 * being shown, false otherwise. 155 */ 156 public void onHeadersTransitionStop(boolean withHeaders) { 157 } 158 } 159 160 private static final String TAG = "BrowseSupportFragment"; 161 162 private static final String LB_HEADERS_BACKSTACK = "lbHeadersBackStack_"; 163 164 private static boolean DEBUG = false; 165 166 /** The headers fragment is enabled and shown by default. */ 167 public static final int HEADERS_ENABLED = 1; 168 169 /** The headers fragment is enabled and hidden by default. */ 170 public static final int HEADERS_HIDDEN = 2; 171 172 /** The headers fragment is disabled and will never be shown. */ 173 public static final int HEADERS_DISABLED = 3; 174 175 private static final float SLIDE_DISTANCE_FACTOR = 2; 176 177 private RowsSupportFragment mRowsSupportFragment; 178 private HeadersSupportFragment mHeadersSupportFragment; 179 180 private ObjectAdapter mAdapter; 181 182 private String mTitle; 183 private Drawable mBadgeDrawable; 184 private int mHeadersState = HEADERS_ENABLED; 185 private int mBrandColor = Color.TRANSPARENT; 186 private boolean mBrandColorSet; 187 188 private BrowseFrameLayout mBrowseFrame; 189 private TitleView mTitleView; 190 private boolean mShowingTitle = true; 191 private boolean mHeadersBackStackEnabled = true; 192 private String mWithHeadersBackStackName; 193 private boolean mShowingHeaders = true; 194 private boolean mCanShowHeaders = true; 195 private int mContainerListMarginStart; 196 private int mContainerListAlignTop; 197 private boolean mRowScaleEnabled = true; 198 private SearchOrbView.Colors mSearchAffordanceColors; 199 private boolean mSearchAffordanceColorSet; 200 private OnItemSelectedListener mExternalOnItemSelectedListener; 201 private OnClickListener mExternalOnSearchClickedListener; 202 private OnItemClickedListener mOnItemClickedListener; 203 private OnItemViewSelectedListener mExternalOnItemViewSelectedListener; 204 private OnItemViewClickedListener mOnItemViewClickedListener; 205 private int mSelectedPosition = -1; 206 207 private PresenterSelector mHeaderPresenterSelector; 208 209 // transition related: 210 private Object mSceneWithTitle; 211 private Object mSceneWithoutTitle; 212 private Object mSceneWithHeaders; 213 private Object mSceneWithoutHeaders; 214 private Object mSceneAfterEntranceTransition; 215 private Object mTitleUpTransition; 216 private Object mTitleDownTransition; 217 private Object mHeadersTransition; 218 private BackStackListener mBackStackChangedListener; 219 private BrowseTransitionListener mBrowseTransitionListener; 220 221 private static final String ARG_TITLE = BrowseSupportFragment.class.getCanonicalName() + ".title"; 222 private static final String ARG_BADGE_URI = BrowseSupportFragment.class.getCanonicalName() + ".badge"; 223 private static final String ARG_HEADERS_STATE = 224 BrowseSupportFragment.class.getCanonicalName() + ".headersState"; 225 226 /** 227 * Create arguments for a browse fragment. 228 * 229 * @param args The Bundle to place arguments into, or null if the method 230 * should return a new Bundle. 231 * @param title The title of the BrowseSupportFragment. 232 * @param headersState The initial state of the headers of the 233 * BrowseSupportFragment. Must be one of {@link #HEADERS_ENABLED}, {@link 234 * #HEADERS_HIDDEN}, or {@link #HEADERS_DISABLED}. 235 * @return A Bundle with the given arguments for creating a BrowseSupportFragment. 236 */ 237 public static Bundle createArgs(Bundle args, String title, int headersState) { 238 if (args == null) { 239 args = new Bundle(); 240 } 241 args.putString(ARG_TITLE, title); 242 args.putInt(ARG_HEADERS_STATE, headersState); 243 return args; 244 } 245 246 /** 247 * Sets the brand color for the browse fragment. The brand color is used as 248 * the primary color for UI elements in the browse fragment. For example, 249 * the background color of the headers fragment uses the brand color. 250 * 251 * @param color The color to use as the brand color of the fragment. 252 */ 253 public void setBrandColor(int color) { 254 mBrandColor = color; 255 mBrandColorSet = true; 256 257 if (mHeadersSupportFragment != null) { 258 mHeadersSupportFragment.setBackgroundColor(mBrandColor); 259 } 260 } 261 262 /** 263 * Returns the brand color for the browse fragment. 264 * The default is transparent. 265 */ 266 public int getBrandColor() { 267 return mBrandColor; 268 } 269 270 /** 271 * Sets the adapter containing the rows for the fragment. 272 * 273 * <p>The items referenced by the adapter must be be derived from 274 * {@link Row}. These rows will be used by the rows fragment and the headers 275 * fragment (if not disabled) to render the browse rows. 276 * 277 * @param adapter An ObjectAdapter for the browse rows. All items must 278 * derive from {@link Row}. 279 */ 280 public void setAdapter(ObjectAdapter adapter) { 281 mAdapter = adapter; 282 if (mRowsSupportFragment != null) { 283 mRowsSupportFragment.setAdapter(adapter); 284 mHeadersSupportFragment.setAdapter(adapter); 285 } 286 } 287 288 /** 289 * Returns the adapter containing the rows for the fragment. 290 */ 291 public ObjectAdapter getAdapter() { 292 return mAdapter; 293 } 294 295 /** 296 * Sets an item selection listener. This listener will be called when an 297 * item or row is selected by a user. 298 * 299 * @param listener The listener to call when an item or row is selected. 300 * @deprecated Use {@link #setOnItemViewSelectedListener(OnItemViewSelectedListener)} 301 */ 302 public void setOnItemSelectedListener(OnItemSelectedListener listener) { 303 mExternalOnItemSelectedListener = listener; 304 } 305 306 /** 307 * Sets an item selection listener. 308 */ 309 public void setOnItemViewSelectedListener(OnItemViewSelectedListener listener) { 310 mExternalOnItemViewSelectedListener = listener; 311 } 312 313 /** 314 * Returns an item selection listener. 315 */ 316 public OnItemViewSelectedListener getOnItemViewSelectedListener() { 317 return mExternalOnItemViewSelectedListener; 318 } 319 320 /** 321 * Sets an item clicked listener on the fragment. 322 * 323 * <p>OnItemClickedListener will override {@link View.OnClickListener} that 324 * an item presenter may set during 325 * {@link Presenter#onCreateViewHolder(ViewGroup)}. So in general, you 326 * should choose to use an {@link OnItemClickedListener} or a 327 * {@link View.OnClickListener} on your item views, but not both. 328 * 329 * @param listener The listener to call when an item is clicked. 330 * @deprecated Use {@link #setOnItemViewClickedListener(OnItemViewClickedListener)} 331 */ 332 public void setOnItemClickedListener(OnItemClickedListener listener) { 333 mOnItemClickedListener = listener; 334 if (mRowsSupportFragment != null) { 335 mRowsSupportFragment.setOnItemClickedListener(listener); 336 } 337 } 338 339 /** 340 * Returns the item clicked listener. 341 * @deprecated Use {@link #getOnItemViewClickedListener()} 342 */ 343 public OnItemClickedListener getOnItemClickedListener() { 344 return mOnItemClickedListener; 345 } 346 347 /** 348 * Sets an item clicked listener on the fragment. 349 * OnItemViewClickedListener will override {@link View.OnClickListener} that 350 * item presenter sets during {@link Presenter#onCreateViewHolder(ViewGroup)}. 351 * So in general, developer should choose one of the listeners but not both. 352 */ 353 public void setOnItemViewClickedListener(OnItemViewClickedListener listener) { 354 mOnItemViewClickedListener = listener; 355 if (mRowsSupportFragment != null) { 356 mRowsSupportFragment.setOnItemViewClickedListener(listener); 357 } 358 } 359 360 /** 361 * Returns the item Clicked listener. 362 */ 363 public OnItemViewClickedListener getOnItemViewClickedListener() { 364 return mOnItemViewClickedListener; 365 } 366 367 /** 368 * Sets a click listener for the search affordance. 369 * 370 * <p>The presence of a listener will change the visibility of the search 371 * affordance in the fragment title. When set to non-null, the title will 372 * contain an element that a user may click to begin a search. 373 * 374 * <p>The listener's {@link View.OnClickListener#onClick onClick} method 375 * will be invoked when the user clicks on the search element. 376 * 377 * @param listener The listener to call when the search element is clicked. 378 */ 379 public void setOnSearchClickedListener(View.OnClickListener listener) { 380 mExternalOnSearchClickedListener = listener; 381 if (mTitleView != null) { 382 mTitleView.setOnSearchClickedListener(listener); 383 } 384 } 385 386 /** 387 * Sets the {@link SearchOrbView.Colors} used to draw the search affordance. 388 */ 389 public void setSearchAffordanceColors(SearchOrbView.Colors colors) { 390 mSearchAffordanceColors = colors; 391 mSearchAffordanceColorSet = true; 392 if (mTitleView != null) { 393 mTitleView.setSearchAffordanceColors(mSearchAffordanceColors); 394 } 395 } 396 397 /** 398 * Returns the {@link SearchOrbView.Colors} used to draw the search affordance. 399 */ 400 public SearchOrbView.Colors getSearchAffordanceColors() { 401 if (mSearchAffordanceColorSet) { 402 return mSearchAffordanceColors; 403 } 404 if (mTitleView == null) { 405 throw new IllegalStateException("Fragment views not yet created"); 406 } 407 return mTitleView.getSearchAffordanceColors(); 408 } 409 410 /** 411 * Sets the color used to draw the search affordance. 412 * A default brighter color will be set by the framework. 413 * 414 * @param color The color to use for the search affordance. 415 */ 416 public void setSearchAffordanceColor(int color) { 417 setSearchAffordanceColors(new SearchOrbView.Colors(color)); 418 } 419 420 /** 421 * Returns the color used to draw the search affordance. 422 */ 423 public int getSearchAffordanceColor() { 424 return getSearchAffordanceColors().color; 425 } 426 427 /** 428 * Start a headers transition. 429 * 430 * <p>This method will begin a transition to either show or hide the 431 * headers, depending on the value of withHeaders. If headers are disabled 432 * for this browse fragment, this method will throw an exception. 433 * 434 * @param withHeaders True if the headers should transition to being shown, 435 * false if the transition should result in headers being hidden. 436 */ 437 public void startHeadersTransition(boolean withHeaders) { 438 if (!mCanShowHeaders) { 439 throw new IllegalStateException("Cannot start headers transition"); 440 } 441 if (isInHeadersTransition() || mShowingHeaders == withHeaders) { 442 return; 443 } 444 startHeadersTransitionInternal(withHeaders); 445 } 446 447 /** 448 * Returns true if the headers transition is currently running. 449 */ 450 public boolean isInHeadersTransition() { 451 return mHeadersTransition != null; 452 } 453 454 /** 455 * Returns true if headers are shown. 456 */ 457 public boolean isShowingHeaders() { 458 return mShowingHeaders; 459 } 460 461 /** 462 * Set a listener for browse fragment transitions. 463 * 464 * @param listener The listener to call when a browse headers transition 465 * begins or ends. 466 */ 467 public void setBrowseTransitionListener(BrowseTransitionListener listener) { 468 mBrowseTransitionListener = listener; 469 } 470 471 /** 472 * Enables scaling of rows when headers are present. 473 * By default enabled to increase density. 474 * 475 * @param enable true to enable row scaling 476 */ 477 public void enableRowScaling(boolean enable) { 478 mRowScaleEnabled = enable; 479 if (mRowsSupportFragment != null) { 480 mRowsSupportFragment.enableRowScaling(mRowScaleEnabled); 481 } 482 } 483 484 private void startHeadersTransitionInternal(final boolean withHeaders) { 485 if (getFragmentManager().isDestroyed()) { 486 return; 487 } 488 mShowingHeaders = withHeaders; 489 mRowsSupportFragment.onExpandTransitionStart(!withHeaders, new Runnable() { 490 @Override 491 public void run() { 492 mHeadersSupportFragment.onTransitionStart(); 493 createHeadersTransition(); 494 if (mBrowseTransitionListener != null) { 495 mBrowseTransitionListener.onHeadersTransitionStart(withHeaders); 496 } 497 sTransitionHelper.runTransition(withHeaders ? mSceneWithHeaders : mSceneWithoutHeaders, 498 mHeadersTransition); 499 if (mHeadersBackStackEnabled) { 500 if (!withHeaders) { 501 getFragmentManager().beginTransaction() 502 .addToBackStack(mWithHeadersBackStackName).commit(); 503 } else { 504 int index = mBackStackChangedListener.mIndexOfHeadersBackStack; 505 if (index >= 0) { 506 BackStackEntry entry = getFragmentManager().getBackStackEntryAt(index); 507 getFragmentManager().popBackStackImmediate(entry.getId(), 508 FragmentManager.POP_BACK_STACK_INCLUSIVE); 509 } 510 } 511 } 512 } 513 }); 514 } 515 516 private boolean isVerticalScrolling() { 517 // don't run transition 518 return mHeadersSupportFragment.getVerticalGridView().getScrollState() 519 != HorizontalGridView.SCROLL_STATE_IDLE 520 || mRowsSupportFragment.getVerticalGridView().getScrollState() 521 != HorizontalGridView.SCROLL_STATE_IDLE; 522 } 523 524 private final BrowseFrameLayout.OnFocusSearchListener mOnFocusSearchListener = 525 new BrowseFrameLayout.OnFocusSearchListener() { 526 @Override 527 public View onFocusSearch(View focused, int direction) { 528 // if headers is running transition, focus stays 529 if (mCanShowHeaders && isInHeadersTransition()) { 530 return focused; 531 } 532 if (DEBUG) Log.v(TAG, "onFocusSearch focused " + focused + " + direction " + direction); 533 534 final View searchOrbView = mTitleView.getSearchAffordanceView(); 535 if (focused == searchOrbView && direction == View.FOCUS_DOWN) { 536 return mCanShowHeaders && mShowingHeaders ? 537 mHeadersSupportFragment.getVerticalGridView() : 538 mRowsSupportFragment.getVerticalGridView(); 539 } else if (focused != searchOrbView && searchOrbView.getVisibility() == View.VISIBLE 540 && direction == View.FOCUS_UP) { 541 return searchOrbView; 542 } 543 544 // If headers fragment is disabled, just return null. 545 if (!mCanShowHeaders) { 546 return null; 547 } 548 boolean isRtl = ViewCompat.getLayoutDirection(focused) == View.LAYOUT_DIRECTION_RTL; 549 int towardStart = isRtl ? View.FOCUS_RIGHT : View.FOCUS_LEFT; 550 int towardEnd = isRtl ? View.FOCUS_LEFT : View.FOCUS_RIGHT; 551 if (direction == towardStart) { 552 if (isVerticalScrolling() || mShowingHeaders) { 553 return focused; 554 } 555 return mHeadersSupportFragment.getVerticalGridView(); 556 } else if (direction == towardEnd) { 557 if (isVerticalScrolling() || !mShowingHeaders) { 558 return focused; 559 } 560 return mRowsSupportFragment.getVerticalGridView(); 561 } else { 562 return null; 563 } 564 } 565 }; 566 567 private final BrowseFrameLayout.OnChildFocusListener mOnChildFocusListener = 568 new BrowseFrameLayout.OnChildFocusListener() { 569 570 @Override 571 public boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { 572 if (getChildFragmentManager().isDestroyed()) { 573 return true; 574 } 575 // Make sure not changing focus when requestFocus() is called. 576 if (mCanShowHeaders && mShowingHeaders) { 577 if (mHeadersSupportFragment != null && mHeadersSupportFragment.getView() != null && 578 mHeadersSupportFragment.getView().requestFocus(direction, previouslyFocusedRect)) { 579 return true; 580 } 581 } 582 if (mRowsSupportFragment != null && mRowsSupportFragment.getView() != null && 583 mRowsSupportFragment.getView().requestFocus(direction, previouslyFocusedRect)) { 584 return true; 585 } 586 if (mTitleView != null && 587 mTitleView.requestFocus(direction, previouslyFocusedRect)) { 588 return true; 589 } 590 return false; 591 }; 592 593 @Override 594 public void onRequestChildFocus(View child, View focused) { 595 if (getChildFragmentManager().isDestroyed()) { 596 return; 597 } 598 if (!mCanShowHeaders || isInHeadersTransition()) return; 599 int childId = child.getId(); 600 if (childId == R.id.browse_container_dock && mShowingHeaders) { 601 startHeadersTransitionInternal(false); 602 } else if (childId == R.id.browse_headers_dock && !mShowingHeaders) { 603 startHeadersTransitionInternal(true); 604 } 605 } 606 }; 607 608 @Override 609 public void onSaveInstanceState(Bundle outState) { 610 if (mBackStackChangedListener != null) { 611 mBackStackChangedListener.save(outState); 612 } else { 613 outState.putBoolean(HEADER_SHOW, mShowingHeaders); 614 } 615 outState.putBoolean(TITLE_SHOW, mShowingTitle); 616 } 617 618 @Override 619 public void onCreate(Bundle savedInstanceState) { 620 super.onCreate(savedInstanceState); 621 TypedArray ta = getActivity().obtainStyledAttributes(R.styleable.LeanbackTheme); 622 mContainerListMarginStart = (int) ta.getDimension( 623 R.styleable.LeanbackTheme_browseRowsMarginStart, 0); 624 mContainerListAlignTop = (int) ta.getDimension( 625 R.styleable.LeanbackTheme_browseRowsMarginTop, 0); 626 ta.recycle(); 627 628 readArguments(getArguments()); 629 630 if (mCanShowHeaders) { 631 if (mHeadersBackStackEnabled) { 632 mWithHeadersBackStackName = LB_HEADERS_BACKSTACK + this; 633 mBackStackChangedListener = new BackStackListener(); 634 getFragmentManager().addOnBackStackChangedListener(mBackStackChangedListener); 635 mBackStackChangedListener.load(savedInstanceState); 636 } else { 637 if (savedInstanceState != null) { 638 mShowingHeaders = savedInstanceState.getBoolean(HEADER_SHOW); 639 } 640 } 641 } 642 643 } 644 645 @Override 646 public void onDestroy() { 647 if (mBackStackChangedListener != null) { 648 getFragmentManager().removeOnBackStackChangedListener(mBackStackChangedListener); 649 } 650 super.onDestroy(); 651 } 652 653 @Override 654 public View onCreateView(LayoutInflater inflater, ViewGroup container, 655 Bundle savedInstanceState) { 656 if (getChildFragmentManager().findFragmentById(R.id.browse_container_dock) == null) { 657 mRowsSupportFragment = new RowsSupportFragment(); 658 mHeadersSupportFragment = new HeadersSupportFragment(); 659 getChildFragmentManager().beginTransaction() 660 .replace(R.id.browse_headers_dock, mHeadersSupportFragment) 661 .replace(R.id.browse_container_dock, mRowsSupportFragment).commit(); 662 } else { 663 mHeadersSupportFragment = (HeadersSupportFragment) getChildFragmentManager() 664 .findFragmentById(R.id.browse_headers_dock); 665 mRowsSupportFragment = (RowsSupportFragment) getChildFragmentManager() 666 .findFragmentById(R.id.browse_container_dock); 667 } 668 669 mHeadersSupportFragment.setHeadersGone(!mCanShowHeaders); 670 671 mRowsSupportFragment.setAdapter(mAdapter); 672 if (mHeaderPresenterSelector != null) { 673 mHeadersSupportFragment.setPresenterSelector(mHeaderPresenterSelector); 674 } 675 mHeadersSupportFragment.setAdapter(mAdapter); 676 677 mRowsSupportFragment.enableRowScaling(mRowScaleEnabled); 678 mRowsSupportFragment.setOnItemSelectedListener(mRowSelectedListener); 679 mRowsSupportFragment.setOnItemViewSelectedListener(mRowViewSelectedListener); 680 mHeadersSupportFragment.setOnItemSelectedListener(mHeaderSelectedListener); 681 mHeadersSupportFragment.setOnHeaderClickedListener(mHeaderClickedListener); 682 mRowsSupportFragment.setOnItemClickedListener(mOnItemClickedListener); 683 mRowsSupportFragment.setOnItemViewClickedListener(mOnItemViewClickedListener); 684 685 View root = inflater.inflate(R.layout.lb_browse_fragment, container, false); 686 687 mBrowseFrame = (BrowseFrameLayout) root.findViewById(R.id.browse_frame); 688 mBrowseFrame.setOnFocusSearchListener(mOnFocusSearchListener); 689 mBrowseFrame.setOnChildFocusListener(mOnChildFocusListener); 690 691 mTitleView = (TitleView) root.findViewById(R.id.browse_title_group); 692 mTitleView.setTitle(mTitle); 693 mTitleView.setBadgeDrawable(mBadgeDrawable); 694 if (mSearchAffordanceColorSet) { 695 mTitleView.setSearchAffordanceColors(mSearchAffordanceColors); 696 } 697 if (mExternalOnSearchClickedListener != null) { 698 mTitleView.setOnSearchClickedListener(mExternalOnSearchClickedListener); 699 } 700 701 if (mBrandColorSet) { 702 mHeadersSupportFragment.setBackgroundColor(mBrandColor); 703 } 704 705 mSceneWithTitle = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 706 @Override 707 public void run() { 708 mTitleView.setVisibility(View.VISIBLE); 709 } 710 }); 711 mSceneWithoutTitle = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 712 @Override 713 public void run() { 714 mTitleView.setVisibility(View.INVISIBLE); 715 } 716 }); 717 mSceneWithHeaders = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 718 @Override 719 public void run() { 720 showHeaders(true); 721 } 722 }); 723 mSceneWithoutHeaders = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 724 @Override 725 public void run() { 726 showHeaders(false); 727 } 728 }); 729 mSceneAfterEntranceTransition = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 730 @Override 731 public void run() { 732 setEntranceTransitionEndState(); 733 } 734 }); 735 Context context = getActivity(); 736 mTitleUpTransition = LeanbackTransitionHelper.loadTitleOutTransition(context, 737 sTransitionHelper); 738 mTitleDownTransition = LeanbackTransitionHelper.loadTitleInTransition(context, 739 sTransitionHelper); 740 741 if (savedInstanceState != null) { 742 mShowingTitle = savedInstanceState.getBoolean(TITLE_SHOW); 743 } 744 mTitleView.setVisibility(mShowingTitle ? View.VISIBLE: View.INVISIBLE); 745 746 return root; 747 } 748 749 private void createHeadersTransition() { 750 mHeadersTransition = sTransitionHelper.loadTransition(getActivity(), 751 mShowingHeaders ? 752 R.transition.lb_browse_headers_in : R.transition.lb_browse_headers_out); 753 754 sTransitionHelper.setTransitionListener(mHeadersTransition, new TransitionListener() { 755 @Override 756 public void onTransitionStart(Object transition) { 757 } 758 @Override 759 public void onTransitionEnd(Object transition) { 760 mHeadersTransition = null; 761 mRowsSupportFragment.onTransitionEnd(); 762 mHeadersSupportFragment.onTransitionEnd(); 763 if (mShowingHeaders) { 764 VerticalGridView headerGridView = mHeadersSupportFragment.getVerticalGridView(); 765 if (headerGridView != null && !headerGridView.hasFocus()) { 766 headerGridView.requestFocus(); 767 } 768 } else { 769 VerticalGridView rowsGridView = mRowsSupportFragment.getVerticalGridView(); 770 if (rowsGridView != null && !rowsGridView.hasFocus()) { 771 rowsGridView.requestFocus(); 772 } 773 } 774 if (mBrowseTransitionListener != null) { 775 mBrowseTransitionListener.onHeadersTransitionStop(mShowingHeaders); 776 } 777 } 778 }); 779 } 780 781 /** 782 * Sets the {@link PresenterSelector} used to render the row headers. 783 * 784 * @param headerPresenterSelector The PresenterSelector that will determine 785 * the Presenter for each row header. 786 */ 787 public void setHeaderPresenterSelector(PresenterSelector headerPresenterSelector) { 788 mHeaderPresenterSelector = headerPresenterSelector; 789 if (mHeadersSupportFragment != null) { 790 mHeadersSupportFragment.setPresenterSelector(mHeaderPresenterSelector); 791 } 792 } 793 794 private void setRowsAlignedLeft(boolean alignLeft) { 795 MarginLayoutParams lp; 796 View containerList; 797 containerList = mRowsSupportFragment.getView(); 798 lp = (MarginLayoutParams) containerList.getLayoutParams(); 799 lp.setMarginStart(alignLeft ? 0 : mContainerListMarginStart); 800 containerList.setLayoutParams(lp); 801 } 802 803 private void setHeadersOnScreen(boolean onScreen) { 804 MarginLayoutParams lp; 805 View containerList; 806 containerList = mHeadersSupportFragment.getView(); 807 lp = (MarginLayoutParams) containerList.getLayoutParams(); 808 lp.setMarginStart(onScreen ? 0 : -mContainerListMarginStart); 809 containerList.setLayoutParams(lp); 810 } 811 812 private void showHeaders(boolean show) { 813 if (DEBUG) Log.v(TAG, "showHeaders " + show); 814 mHeadersSupportFragment.setHeadersEnabled(show); 815 setHeadersOnScreen(show); 816 setRowsAlignedLeft(!show); 817 mRowsSupportFragment.setExpand(!show); 818 } 819 820 private HeadersSupportFragment.OnHeaderClickedListener mHeaderClickedListener = 821 new HeadersSupportFragment.OnHeaderClickedListener() { 822 @Override 823 public void onHeaderClicked() { 824 if (!mCanShowHeaders || !mShowingHeaders || isInHeadersTransition()) { 825 return; 826 } 827 startHeadersTransitionInternal(false); 828 mRowsSupportFragment.getVerticalGridView().requestFocus(); 829 } 830 }; 831 832 private OnItemViewSelectedListener mRowViewSelectedListener = new OnItemViewSelectedListener() { 833 @Override 834 public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item, 835 RowPresenter.ViewHolder rowViewHolder, Row row) { 836 int position = mRowsSupportFragment.getVerticalGridView().getSelectedPosition(); 837 if (DEBUG) Log.v(TAG, "row selected position " + position); 838 onRowSelected(position); 839 if (mExternalOnItemViewSelectedListener != null) { 840 mExternalOnItemViewSelectedListener.onItemSelected(itemViewHolder, item, 841 rowViewHolder, row); 842 } 843 } 844 }; 845 846 private OnItemSelectedListener mRowSelectedListener = new OnItemSelectedListener() { 847 @Override 848 public void onItemSelected(Object item, Row row) { 849 if (mExternalOnItemSelectedListener != null) { 850 mExternalOnItemSelectedListener.onItemSelected(item, row); 851 } 852 } 853 }; 854 855 private OnItemSelectedListener mHeaderSelectedListener = new OnItemSelectedListener() { 856 @Override 857 public void onItemSelected(Object item, Row row) { 858 int position = mHeadersSupportFragment.getVerticalGridView().getSelectedPosition(); 859 if (DEBUG) Log.v(TAG, "header selected position " + position); 860 onRowSelected(position); 861 } 862 }; 863 864 private void onRowSelected(int position) { 865 if (position != mSelectedPosition) { 866 mSetSelectionRunnable.mPosition = position; 867 mBrowseFrame.getHandler().post(mSetSelectionRunnable); 868 869 if (getAdapter() == null || getAdapter().size() == 0 || position == 0) { 870 if (!mShowingTitle) { 871 sTransitionHelper.runTransition(mSceneWithTitle, mTitleDownTransition); 872 mShowingTitle = true; 873 } 874 } else if (mShowingTitle) { 875 sTransitionHelper.runTransition(mSceneWithoutTitle, mTitleUpTransition); 876 mShowingTitle = false; 877 } 878 } 879 } 880 881 private class SetSelectionRunnable implements Runnable { 882 int mPosition; 883 boolean mSmooth = true; 884 @Override 885 public void run() { 886 setSelection(mPosition, mSmooth); 887 } 888 } 889 890 private final SetSelectionRunnable mSetSelectionRunnable = new SetSelectionRunnable(); 891 892 private void setSelection(int position, boolean smooth) { 893 if (position != NO_POSITION) { 894 mRowsSupportFragment.setSelectedPosition(position, smooth); 895 mHeadersSupportFragment.setSelectedPosition(position, smooth); 896 } 897 mSelectedPosition = position; 898 } 899 900 /** 901 * Sets the selected row position with smooth animation. 902 */ 903 public void setSelectedPosition(int position) { 904 setSelectedPosition(position, true); 905 } 906 907 /** 908 * Sets the selected row position. 909 */ 910 public void setSelectedPosition(int position, boolean smooth) { 911 mSetSelectionRunnable.mPosition = position; 912 mSetSelectionRunnable.mSmooth = smooth; 913 mBrowseFrame.getHandler().post(mSetSelectionRunnable); 914 } 915 916 @Override 917 public void onStart() { 918 super.onStart(); 919 mHeadersSupportFragment.setWindowAlignmentFromTop(mContainerListAlignTop); 920 mHeadersSupportFragment.setItemAlignment(); 921 mRowsSupportFragment.setWindowAlignmentFromTop(mContainerListAlignTop); 922 mRowsSupportFragment.setItemAlignment(); 923 924 mRowsSupportFragment.setScalePivots(0, mContainerListAlignTop); 925 926 if (mCanShowHeaders && mShowingHeaders && mHeadersSupportFragment.getView() != null) { 927 mHeadersSupportFragment.getView().requestFocus(); 928 } else if ((!mCanShowHeaders || !mShowingHeaders) 929 && mRowsSupportFragment.getView() != null) { 930 mRowsSupportFragment.getView().requestFocus(); 931 } 932 if (mCanShowHeaders) { 933 showHeaders(mShowingHeaders); 934 } 935 if (isEntranceTransitionEnabled()) { 936 setEntranceTransitionStartState(); 937 } 938 } 939 940 @Override 941 public void onPause() { 942 mTitleView.enableAnimation(false); 943 super.onPause(); 944 } 945 946 @Override 947 public void onResume() { 948 super.onResume(); 949 mTitleView.enableAnimation(true); 950 } 951 952 /** 953 * Enable/disable headers transition on back key support. This is enabled by 954 * default. The BrowseSupportFragment will add a back stack entry when headers are 955 * showing. Running a headers transition when the back key is pressed only 956 * works when the headers state is {@link #HEADERS_ENABLED} or 957 * {@link #HEADERS_HIDDEN}. 958 * <p> 959 * NOTE: If an Activity has its own onBackPressed() handling, you must 960 * disable this feature. You may use {@link #startHeadersTransition(boolean)} 961 * and {@link BrowseTransitionListener} in your own back stack handling. 962 */ 963 public final void setHeadersTransitionOnBackEnabled(boolean headersBackStackEnabled) { 964 mHeadersBackStackEnabled = headersBackStackEnabled; 965 } 966 967 /** 968 * Returns true if headers transition on back key support is enabled. 969 */ 970 public final boolean isHeadersTransitionOnBackEnabled() { 971 return mHeadersBackStackEnabled; 972 } 973 974 private void readArguments(Bundle args) { 975 if (args == null) { 976 return; 977 } 978 if (args.containsKey(ARG_TITLE)) { 979 setTitle(args.getString(ARG_TITLE)); 980 } 981 if (args.containsKey(ARG_HEADERS_STATE)) { 982 setHeadersState(args.getInt(ARG_HEADERS_STATE)); 983 } 984 } 985 986 /** 987 * Sets the drawable displayed in the browse fragment title. 988 * 989 * @param drawable The Drawable to display in the browse fragment title. 990 */ 991 public void setBadgeDrawable(Drawable drawable) { 992 if (mBadgeDrawable != drawable) { 993 mBadgeDrawable = drawable; 994 if (mTitleView != null) { 995 mTitleView.setBadgeDrawable(drawable); 996 } 997 } 998 } 999 1000 /** 1001 * Returns the badge drawable used in the fragment title. 1002 */ 1003 public Drawable getBadgeDrawable() { 1004 return mBadgeDrawable; 1005 } 1006 1007 /** 1008 * Sets a title for the browse fragment. 1009 * 1010 * @param title The title of the browse fragment. 1011 */ 1012 public void setTitle(String title) { 1013 mTitle = title; 1014 if (mTitleView != null) { 1015 mTitleView.setTitle(title); 1016 } 1017 } 1018 1019 /** 1020 * Returns the title for the browse fragment. 1021 */ 1022 public String getTitle() { 1023 return mTitle; 1024 } 1025 1026 /** 1027 * Sets the state for the headers column in the browse fragment. Must be one 1028 * of {@link #HEADERS_ENABLED}, {@link #HEADERS_HIDDEN}, or 1029 * {@link #HEADERS_DISABLED}. 1030 * 1031 * @param headersState The state of the headers for the browse fragment. 1032 */ 1033 public void setHeadersState(int headersState) { 1034 if (headersState < HEADERS_ENABLED || headersState > HEADERS_DISABLED) { 1035 throw new IllegalArgumentException("Invalid headers state: " + headersState); 1036 } 1037 if (DEBUG) Log.v(TAG, "setHeadersState " + headersState); 1038 1039 if (headersState != mHeadersState) { 1040 mHeadersState = headersState; 1041 switch (headersState) { 1042 case HEADERS_ENABLED: 1043 mCanShowHeaders = true; 1044 mShowingHeaders = true; 1045 break; 1046 case HEADERS_HIDDEN: 1047 mCanShowHeaders = true; 1048 mShowingHeaders = false; 1049 break; 1050 case HEADERS_DISABLED: 1051 mCanShowHeaders = false; 1052 mShowingHeaders = false; 1053 break; 1054 default: 1055 Log.w(TAG, "Unknown headers state: " + headersState); 1056 break; 1057 } 1058 if (mHeadersSupportFragment != null) { 1059 mHeadersSupportFragment.setHeadersGone(!mCanShowHeaders); 1060 } 1061 } 1062 } 1063 1064 /** 1065 * Returns the state of the headers column in the browse fragment. 1066 */ 1067 public int getHeadersState() { 1068 return mHeadersState; 1069 } 1070 1071 @Override 1072 protected Object createEntranceTransition() { 1073 return sTransitionHelper.loadTransition(getActivity(), 1074 R.transition.lb_browse_entrance_transition); 1075 } 1076 1077 @Override 1078 protected void runEntranceTransition(Object entranceTransition) { 1079 sTransitionHelper.runTransition(mSceneAfterEntranceTransition, 1080 entranceTransition); 1081 } 1082 1083 @Override 1084 protected void onEntranceTransitionStart() { 1085 mHeadersSupportFragment.onTransitionStart(); 1086 mRowsSupportFragment.onTransitionStart(); 1087 } 1088 1089 @Override 1090 protected void onEntranceTransitionEnd() { 1091 mRowsSupportFragment.onTransitionEnd(); 1092 mHeadersSupportFragment.onTransitionEnd(); 1093 } 1094 1095 void setSearchOrbViewOnScreen(boolean onScreen) { 1096 View searchOrbView = mTitleView.getSearchAffordanceView(); 1097 MarginLayoutParams lp = (MarginLayoutParams) searchOrbView.getLayoutParams(); 1098 lp.setMarginStart(onScreen ? 0 : -mContainerListMarginStart); 1099 searchOrbView.setLayoutParams(lp); 1100 } 1101 1102 void setEntranceTransitionStartState() { 1103 setHeadersOnScreen(false); 1104 setSearchOrbViewOnScreen(false); 1105 mRowsSupportFragment.setEntranceTransitionState(false); 1106 } 1107 1108 void setEntranceTransitionEndState() { 1109 setHeadersOnScreen(mShowingHeaders); 1110 setSearchOrbViewOnScreen(true); 1111 mRowsSupportFragment.setEntranceTransitionState(true); 1112 } 1113 1114} 1115 1116