BrowseSupportFragment.java revision 34f3ee7e818a20939ef49abf5509bcfaea5c3db0
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.util.Log; 37import android.support.v4.app.FragmentActivity; 38import android.support.v4.app.Fragment; 39import android.support.v4.app.FragmentManager; 40import android.support.v4.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.graphics.Color; 50import android.graphics.Rect; 51import android.graphics.drawable.Drawable; 52 53import static android.support.v7.widget.RecyclerView.NO_POSITION; 54 55/** 56 * A fragment for creating Leanback browse screens. It is composed of a 57 * RowsSupportFragment and a HeadersSupportFragment. 58 * <p> 59 * A BrowseSupportFragment renders the elements of its {@link ObjectAdapter} as a set 60 * of rows in a vertical list. The elements in this adapter must be subclasses 61 * of {@link Row}. 62 * <p> 63 * The HeadersSupportFragment can be set to be either shown or hidden by default, or 64 * may be disabled entirely. See {@link #setHeadersState} for details. 65 * <p> 66 * By default the BrowseSupportFragment includes support for returning to the headers 67 * when the user presses Back. For Activities that customize {@link 68 * android.support.v4.app.FragmentActivity#onBackPressed()}, you must disable this default Back key support by 69 * calling {@link #setHeadersTransitionOnBackEnabled(boolean)} with false and 70 * use {@link BrowseSupportFragment.BrowseTransitionListener} and 71 * {@link #startHeadersTransition(boolean)}. 72 */ 73public class BrowseSupportFragment extends Fragment { 74 75 // BUNDLE attribute for saving header show/hide status when backstack is used: 76 static final String HEADER_STACK_INDEX = "headerStackIndex"; 77 // BUNDLE attribute for saving header show/hide status when backstack is not used: 78 static final String HEADER_SHOW = "headerShow"; 79 // BUNDLE attribute for title is showing 80 static final String TITLE_SHOW = "titleShow"; 81 82 final class BackStackListener implements FragmentManager.OnBackStackChangedListener { 83 int mLastEntryCount; 84 int mIndexOfHeadersBackStack; 85 86 BackStackListener() { 87 mLastEntryCount = getFragmentManager().getBackStackEntryCount(); 88 mIndexOfHeadersBackStack = -1; 89 } 90 91 void load(Bundle savedInstanceState) { 92 if (savedInstanceState != null) { 93 mIndexOfHeadersBackStack = savedInstanceState.getInt(HEADER_STACK_INDEX, -1); 94 mShowingHeaders = mIndexOfHeadersBackStack == -1; 95 } else { 96 if (!mShowingHeaders) { 97 getFragmentManager().beginTransaction() 98 .addToBackStack(mWithHeadersBackStackName).commit(); 99 } 100 } 101 } 102 103 void save(Bundle outState) { 104 outState.putInt(HEADER_STACK_INDEX, mIndexOfHeadersBackStack); 105 } 106 107 108 @Override 109 public void onBackStackChanged() { 110 if (getFragmentManager() == null) { 111 Log.w(TAG, "getFragmentManager() is null, stack:", new Exception()); 112 return; 113 } 114 int count = getFragmentManager().getBackStackEntryCount(); 115 // if backstack is growing and last pushed entry is "headers" backstack, 116 // remember the index of the entry. 117 if (count > mLastEntryCount) { 118 BackStackEntry entry = getFragmentManager().getBackStackEntryAt(count - 1); 119 if (mWithHeadersBackStackName.equals(entry.getName())) { 120 mIndexOfHeadersBackStack = count - 1; 121 } 122 } else if (count < mLastEntryCount) { 123 // if popped "headers" backstack, initiate the show header transition if needed 124 if (mIndexOfHeadersBackStack >= count) { 125 mIndexOfHeadersBackStack = -1; 126 if (!mShowingHeaders) { 127 startHeadersTransitionInternal(true); 128 } 129 } 130 } 131 mLastEntryCount = count; 132 } 133 } 134 135 /** 136 * Listener for transitions between browse headers and rows. 137 */ 138 public static class BrowseTransitionListener { 139 /** 140 * Callback when headers transition starts. 141 * 142 * @param withHeaders True if the transition will result in headers 143 * being shown, false otherwise. 144 */ 145 public void onHeadersTransitionStart(boolean withHeaders) { 146 } 147 /** 148 * Callback when headers transition stops. 149 * 150 * @param withHeaders True if the transition will result in headers 151 * being shown, false otherwise. 152 */ 153 public void onHeadersTransitionStop(boolean withHeaders) { 154 } 155 } 156 157 private static final String TAG = "BrowseSupportFragment"; 158 159 private static final String LB_HEADERS_BACKSTACK = "lbHeadersBackStack_"; 160 161 private static boolean DEBUG = false; 162 163 /** The headers fragment is enabled and shown by default. */ 164 public static final int HEADERS_ENABLED = 1; 165 166 /** The headers fragment is enabled and hidden by default. */ 167 public static final int HEADERS_HIDDEN = 2; 168 169 /** The headers fragment is disabled and will never be shown. */ 170 public static final int HEADERS_DISABLED = 3; 171 172 private static final float SLIDE_DISTANCE_FACTOR = 2; 173 174 private RowsSupportFragment mRowsSupportFragment; 175 private HeadersSupportFragment mHeadersSupportFragment; 176 177 private ObjectAdapter mAdapter; 178 179 private String mTitle; 180 private Drawable mBadgeDrawable; 181 private int mHeadersState = HEADERS_ENABLED; 182 private int mBrandColor = Color.TRANSPARENT; 183 private boolean mBrandColorSet; 184 185 private BrowseFrameLayout mBrowseFrame; 186 private TitleView mTitleView; 187 private boolean mShowingTitle = true; 188 private boolean mHeadersBackStackEnabled = true; 189 private String mWithHeadersBackStackName; 190 private boolean mShowingHeaders = true; 191 private boolean mCanShowHeaders = true; 192 private int mContainerListMarginLeft; 193 private int mContainerListAlignTop; 194 private boolean mRowScaleEnabled = true; 195 private SearchOrbView.Colors mSearchAffordanceColors; 196 private boolean mSearchAffordanceColorSet; 197 private OnItemSelectedListener mExternalOnItemSelectedListener; 198 private OnClickListener mExternalOnSearchClickedListener; 199 private OnItemClickedListener mOnItemClickedListener; 200 private OnItemViewSelectedListener mExternalOnItemViewSelectedListener; 201 private OnItemViewClickedListener mOnItemViewClickedListener; 202 private int mSelectedPosition = -1; 203 204 private PresenterSelector mHeaderPresenterSelector; 205 206 // transition related: 207 private static TransitionHelper sTransitionHelper = TransitionHelper.getInstance(); 208 private int mReparentHeaderId = View.generateViewId(); 209 private Object mSceneWithTitle; 210 private Object mSceneWithoutTitle; 211 private Object mSceneWithHeaders; 212 private Object mSceneWithoutHeaders; 213 private Object mTitleUpTransition; 214 private Object mTitleDownTransition; 215 private Object mHeadersTransition; 216 private int mHeadersTransitionStartDelay; 217 private int mHeadersTransitionDuration; 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 fragment is disabled, just return null. 529 if (!mCanShowHeaders) return null; 530 531 final View searchOrbView = mTitleView.getSearchAffordanceView(); 532 // if headers is running transition, focus stays 533 if (isInHeadersTransition()) return focused; 534 if (DEBUG) Log.v(TAG, "onFocusSearch focused " + focused + " + direction " + direction); 535 if (direction == View.FOCUS_LEFT) { 536 if (isVerticalScrolling() || mShowingHeaders) { 537 return focused; 538 } 539 return mHeadersSupportFragment.getVerticalGridView(); 540 } else if (direction == View.FOCUS_RIGHT) { 541 if (isVerticalScrolling() || !mShowingHeaders) { 542 return focused; 543 } 544 return mRowsSupportFragment.getVerticalGridView(); 545 } else if (focused == searchOrbView && direction == View.FOCUS_DOWN) { 546 return mShowingHeaders ? mHeadersSupportFragment.getVerticalGridView() : 547 mRowsSupportFragment.getVerticalGridView(); 548 549 } else if (focused != searchOrbView && searchOrbView.getVisibility() == View.VISIBLE 550 && direction == View.FOCUS_UP) { 551 return searchOrbView; 552 553 } else { 554 return null; 555 } 556 } 557 }; 558 559 private final BrowseFrameLayout.OnChildFocusListener mOnChildFocusListener = 560 new BrowseFrameLayout.OnChildFocusListener() { 561 562 @Override 563 public boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { 564 if (getChildFragmentManager().isDestroyed()) { 565 return true; 566 } 567 // Make sure not changing focus when requestFocus() is called. 568 if (mCanShowHeaders && mShowingHeaders) { 569 if (mHeadersSupportFragment.getView().requestFocus(direction, previouslyFocusedRect)) { 570 return true; 571 } 572 } 573 if (mRowsSupportFragment.getView().requestFocus(direction, previouslyFocusedRect)) { 574 return true; 575 } 576 return mTitleView.requestFocus(direction, previouslyFocusedRect); 577 }; 578 579 @Override 580 public void onRequestChildFocus(View child, View focused) { 581 if (getChildFragmentManager().isDestroyed()) { 582 return; 583 } 584 if (!mCanShowHeaders || isInHeadersTransition()) return; 585 int childId = child.getId(); 586 if (childId == R.id.browse_container_dock && mShowingHeaders) { 587 startHeadersTransitionInternal(false); 588 } else if (childId == R.id.browse_headers_dock && !mShowingHeaders) { 589 startHeadersTransitionInternal(true); 590 } 591 } 592 }; 593 594 @Override 595 public void onSaveInstanceState(Bundle outState) { 596 if (mBackStackChangedListener != null) { 597 mBackStackChangedListener.save(outState); 598 } else { 599 outState.putBoolean(HEADER_SHOW, mShowingHeaders); 600 } 601 outState.putBoolean(TITLE_SHOW, mShowingTitle); 602 } 603 604 @Override 605 public void onCreate(Bundle savedInstanceState) { 606 super.onCreate(savedInstanceState); 607 TypedArray ta = getActivity().obtainStyledAttributes(R.styleable.LeanbackTheme); 608 mContainerListMarginLeft = (int) ta.getDimension( 609 R.styleable.LeanbackTheme_browseRowsMarginStart, 0); 610 mContainerListAlignTop = (int) ta.getDimension( 611 R.styleable.LeanbackTheme_browseRowsMarginTop, 0); 612 ta.recycle(); 613 614 mHeadersTransitionStartDelay = getResources() 615 .getInteger(R.integer.lb_browse_headers_transition_delay); 616 mHeadersTransitionDuration = getResources() 617 .getInteger(R.integer.lb_browse_headers_transition_duration); 618 619 readArguments(getArguments()); 620 621 if (mCanShowHeaders) { 622 if (mHeadersBackStackEnabled) { 623 mWithHeadersBackStackName = LB_HEADERS_BACKSTACK + this; 624 mBackStackChangedListener = new BackStackListener(); 625 getFragmentManager().addOnBackStackChangedListener(mBackStackChangedListener); 626 mBackStackChangedListener.load(savedInstanceState); 627 } else { 628 if (savedInstanceState != null) { 629 mShowingHeaders = savedInstanceState.getBoolean(HEADER_SHOW); 630 } 631 } 632 } 633 634 } 635 636 @Override 637 public void onDestroy() { 638 if (mBackStackChangedListener != null) { 639 getFragmentManager().removeOnBackStackChangedListener(mBackStackChangedListener); 640 } 641 super.onDestroy(); 642 } 643 644 @Override 645 public View onCreateView(LayoutInflater inflater, ViewGroup container, 646 Bundle savedInstanceState) { 647 if (getChildFragmentManager().findFragmentById(R.id.browse_container_dock) == null) { 648 mRowsSupportFragment = new RowsSupportFragment(); 649 mHeadersSupportFragment = new HeadersSupportFragment(); 650 getChildFragmentManager().beginTransaction() 651 .replace(R.id.browse_headers_dock, mHeadersSupportFragment) 652 .replace(R.id.browse_container_dock, mRowsSupportFragment).commit(); 653 } else { 654 mHeadersSupportFragment = (HeadersSupportFragment) getChildFragmentManager() 655 .findFragmentById(R.id.browse_headers_dock); 656 mRowsSupportFragment = (RowsSupportFragment) getChildFragmentManager() 657 .findFragmentById(R.id.browse_container_dock); 658 } 659 660 mHeadersSupportFragment.setHeadersGone(!mCanShowHeaders); 661 662 mRowsSupportFragment.setAdapter(mAdapter); 663 if (mHeaderPresenterSelector != null) { 664 mHeadersSupportFragment.setPresenterSelector(mHeaderPresenterSelector); 665 } 666 mHeadersSupportFragment.setAdapter(mAdapter); 667 668 mRowsSupportFragment.enableRowScaling(mRowScaleEnabled); 669 mRowsSupportFragment.setOnItemSelectedListener(mRowSelectedListener); 670 mRowsSupportFragment.setOnItemViewSelectedListener(mRowViewSelectedListener); 671 mHeadersSupportFragment.setOnItemSelectedListener(mHeaderSelectedListener); 672 mHeadersSupportFragment.setOnHeaderClickedListener(mHeaderClickedListener); 673 mRowsSupportFragment.setOnItemClickedListener(mOnItemClickedListener); 674 mRowsSupportFragment.setOnItemViewClickedListener(mOnItemViewClickedListener); 675 676 View root = inflater.inflate(R.layout.lb_browse_fragment, container, false); 677 678 mBrowseFrame = (BrowseFrameLayout) root.findViewById(R.id.browse_frame); 679 mBrowseFrame.setOnFocusSearchListener(mOnFocusSearchListener); 680 mBrowseFrame.setOnChildFocusListener(mOnChildFocusListener); 681 682 mTitleView = (TitleView) root.findViewById(R.id.browse_title_group); 683 mTitleView.setTitle(mTitle); 684 mTitleView.setBadgeDrawable(mBadgeDrawable); 685 if (mSearchAffordanceColorSet) { 686 mTitleView.setSearchAffordanceColors(mSearchAffordanceColors); 687 } 688 if (mExternalOnSearchClickedListener != null) { 689 mTitleView.setOnSearchClickedListener(mExternalOnSearchClickedListener); 690 } 691 692 if (mBrandColorSet) { 693 mHeadersSupportFragment.setBackgroundColor(mBrandColor); 694 } 695 696 mSceneWithTitle = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 697 @Override 698 public void run() { 699 mTitleView.setVisibility(View.VISIBLE); 700 } 701 }); 702 mSceneWithoutTitle = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 703 @Override 704 public void run() { 705 mTitleView.setVisibility(View.INVISIBLE); 706 } 707 }); 708 mSceneWithHeaders = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 709 @Override 710 public void run() { 711 showHeaders(true); 712 } 713 }); 714 mSceneWithoutHeaders = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 715 @Override 716 public void run() { 717 showHeaders(false); 718 } 719 }); 720 mTitleUpTransition = TitleTransitionHelper.createTransitionTitleUp(sTransitionHelper); 721 mTitleDownTransition = TitleTransitionHelper.createTransitionTitleDown(sTransitionHelper); 722 723 sTransitionHelper.excludeChildren(mTitleUpTransition, R.id.browse_headers, true); 724 sTransitionHelper.excludeChildren(mTitleDownTransition, R.id.browse_headers, true); 725 sTransitionHelper.excludeChildren(mTitleUpTransition, R.id.container_list, true); 726 sTransitionHelper.excludeChildren(mTitleDownTransition, R.id.container_list, true); 727 728 if (savedInstanceState != null) { 729 mShowingTitle = savedInstanceState.getBoolean(TITLE_SHOW); 730 } 731 mTitleView.setVisibility(mShowingTitle ? View.VISIBLE: View.INVISIBLE); 732 733 return root; 734 } 735 736 private void createHeadersTransition() { 737 mHeadersTransition = sTransitionHelper.createTransitionSet(false); 738 sTransitionHelper.excludeChildren(mHeadersTransition, R.id.browse_title_group, true); 739 Object changeBounds = sTransitionHelper.createChangeBounds(false); 740 Object fadeIn = sTransitionHelper.createFadeTransition(TransitionHelper.FADE_IN); 741 Object fadeOut = sTransitionHelper.createFadeTransition(TransitionHelper.FADE_OUT); 742 Object scale = sTransitionHelper.createScale(); 743 if (TransitionHelper.systemSupportsTransitions()) { 744 Context context = getView().getContext(); 745 sTransitionHelper.setInterpolator(changeBounds, 746 sTransitionHelper.createDefaultInterpolator(context)); 747 sTransitionHelper.setInterpolator(fadeIn, 748 sTransitionHelper.createDefaultInterpolator(context)); 749 sTransitionHelper.setInterpolator(fadeOut, 750 sTransitionHelper.createDefaultInterpolator(context)); 751 sTransitionHelper.setInterpolator(scale, 752 sTransitionHelper.createDefaultInterpolator(context)); 753 } 754 755 sTransitionHelper.setDuration(fadeOut, mHeadersTransitionDuration); 756 sTransitionHelper.addTransition(mHeadersTransition, fadeOut); 757 758 if (mShowingHeaders) { 759 sTransitionHelper.setStartDelay(changeBounds, mHeadersTransitionStartDelay); 760 sTransitionHelper.setStartDelay(scale, mHeadersTransitionStartDelay); 761 } 762 sTransitionHelper.setDuration(changeBounds, mHeadersTransitionDuration); 763 sTransitionHelper.addTransition(mHeadersTransition, changeBounds); 764 sTransitionHelper.addTarget(scale, mRowsSupportFragment.getView()); 765 sTransitionHelper.setDuration(scale, mHeadersTransitionDuration); 766 sTransitionHelper.addTransition(mHeadersTransition, scale); 767 768 sTransitionHelper.setDuration(fadeIn, mHeadersTransitionDuration); 769 sTransitionHelper.setStartDelay(fadeIn, mHeadersTransitionStartDelay); 770 sTransitionHelper.addTransition(mHeadersTransition, fadeIn); 771 772 sTransitionHelper.setTransitionListener(mHeadersTransition, new TransitionListener() { 773 @Override 774 public void onTransitionStart(Object transition) { 775 } 776 @Override 777 public void onTransitionEnd(Object transition) { 778 mHeadersTransition = null; 779 mRowsSupportFragment.onTransitionEnd(); 780 mHeadersSupportFragment.onTransitionEnd(); 781 if (mShowingHeaders) { 782 VerticalGridView headerGridView = mHeadersSupportFragment.getVerticalGridView(); 783 if (headerGridView != null && !headerGridView.hasFocus()) { 784 headerGridView.requestFocus(); 785 } 786 } else { 787 VerticalGridView rowsGridView = mRowsSupportFragment.getVerticalGridView(); 788 if (rowsGridView != null && !rowsGridView.hasFocus()) { 789 rowsGridView.requestFocus(); 790 } 791 } 792 if (mBrowseTransitionListener != null) { 793 mBrowseTransitionListener.onHeadersTransitionStop(mShowingHeaders); 794 } 795 } 796 }); 797 } 798 799 /** 800 * Sets the {@link PresenterSelector} used to render the row headers. 801 * 802 * @param headerPresenterSelector The PresenterSelector that will determine 803 * the Presenter for each row header. 804 */ 805 public void setHeaderPresenterSelector(PresenterSelector headerPresenterSelector) { 806 mHeaderPresenterSelector = headerPresenterSelector; 807 if (mHeadersSupportFragment != null) { 808 mHeadersSupportFragment.setPresenterSelector(mHeaderPresenterSelector); 809 } 810 } 811 812 private void showHeaders(boolean show) { 813 if (DEBUG) Log.v(TAG, "showHeaders " + show); 814 mHeadersSupportFragment.setHeadersEnabled(show); 815 MarginLayoutParams lp; 816 View containerList; 817 818 containerList = mRowsSupportFragment.getView(); 819 lp = (MarginLayoutParams) containerList.getLayoutParams(); 820 lp.leftMargin = show ? mContainerListMarginLeft : 0; 821 containerList.setLayoutParams(lp); 822 823 containerList = mHeadersSupportFragment.getView(); 824 lp = (MarginLayoutParams) containerList.getLayoutParams(); 825 lp.leftMargin = show ? 0 : -mContainerListMarginLeft; 826 containerList.setLayoutParams(lp); 827 828 mRowsSupportFragment.setExpand(!show); 829 } 830 831 private HeadersSupportFragment.OnHeaderClickedListener mHeaderClickedListener = 832 new HeadersSupportFragment.OnHeaderClickedListener() { 833 @Override 834 public void onHeaderClicked() { 835 if (!mCanShowHeaders || !mShowingHeaders || isInHeadersTransition()) { 836 return; 837 } 838 startHeadersTransitionInternal(false); 839 mRowsSupportFragment.getVerticalGridView().requestFocus(); 840 } 841 }; 842 843 private OnItemViewSelectedListener mRowViewSelectedListener = new OnItemViewSelectedListener() { 844 @Override 845 public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item, 846 RowPresenter.ViewHolder rowViewHolder, Row row) { 847 int position = mRowsSupportFragment.getVerticalGridView().getSelectedPosition(); 848 if (DEBUG) Log.v(TAG, "row selected position " + position); 849 onRowSelected(position); 850 if (mExternalOnItemViewSelectedListener != null) { 851 mExternalOnItemViewSelectedListener.onItemSelected(itemViewHolder, item, 852 rowViewHolder, row); 853 } 854 } 855 }; 856 857 private OnItemSelectedListener mRowSelectedListener = new OnItemSelectedListener() { 858 @Override 859 public void onItemSelected(Object item, Row row) { 860 if (mExternalOnItemSelectedListener != null) { 861 mExternalOnItemSelectedListener.onItemSelected(item, row); 862 } 863 } 864 }; 865 866 private OnItemSelectedListener mHeaderSelectedListener = new OnItemSelectedListener() { 867 @Override 868 public void onItemSelected(Object item, Row row) { 869 int position = mHeadersSupportFragment.getVerticalGridView().getSelectedPosition(); 870 if (DEBUG) Log.v(TAG, "header selected position " + position); 871 onRowSelected(position); 872 } 873 }; 874 875 private void onRowSelected(int position) { 876 if (position != mSelectedPosition) { 877 mSetSelectionRunnable.mPosition = position; 878 mBrowseFrame.getHandler().post(mSetSelectionRunnable); 879 880 if (getAdapter() == null || getAdapter().size() == 0 || position == 0) { 881 if (!mShowingTitle) { 882 sTransitionHelper.runTransition(mSceneWithTitle, mTitleDownTransition); 883 mShowingTitle = true; 884 } 885 } else if (mShowingTitle) { 886 sTransitionHelper.runTransition(mSceneWithoutTitle, mTitleUpTransition); 887 mShowingTitle = false; 888 } 889 } 890 } 891 892 private class SetSelectionRunnable implements Runnable { 893 int mPosition; 894 @Override 895 public void run() { 896 setSelection(mPosition); 897 } 898 } 899 900 private final SetSelectionRunnable mSetSelectionRunnable = new SetSelectionRunnable(); 901 902 private void setSelection(int position) { 903 if (position != NO_POSITION) { 904 mRowsSupportFragment.setSelectedPosition(position); 905 mHeadersSupportFragment.setSelectedPosition(position); 906 } 907 mSelectedPosition = position; 908 } 909 910 @Override 911 public void onStart() { 912 super.onStart(); 913 mHeadersSupportFragment.setWindowAlignmentFromTop(mContainerListAlignTop); 914 mHeadersSupportFragment.setItemAlignment(); 915 mRowsSupportFragment.setWindowAlignmentFromTop(mContainerListAlignTop); 916 mRowsSupportFragment.setItemAlignment(); 917 918 mRowsSupportFragment.getView().setPivotX(0); 919 mRowsSupportFragment.getView().setPivotY(mContainerListAlignTop); 920 921 if (mCanShowHeaders && mShowingHeaders && mHeadersSupportFragment.getView() != null) { 922 mHeadersSupportFragment.getView().requestFocus(); 923 } else if ((!mCanShowHeaders || !mShowingHeaders) 924 && mRowsSupportFragment.getView() != null) { 925 mRowsSupportFragment.getView().requestFocus(); 926 } 927 if (mCanShowHeaders) { 928 showHeaders(mShowingHeaders); 929 } 930 } 931 932 /** 933 * Enable/disable headers transition on back key support. This is enabled by 934 * default. The BrowseSupportFragment will add a back stack entry when headers are 935 * showing. Running a headers transition when the back key is pressed only 936 * works when the headers state is {@link #HEADERS_ENABLED} or 937 * {@link #HEADERS_HIDDEN}. 938 * <p> 939 * NOTE: If an Activity has its own onBackPressed() handling, you must 940 * disable this feature. You may use {@link #startHeadersTransition(boolean)} 941 * and {@link BrowseTransitionListener} in your own back stack handling. 942 */ 943 public final void setHeadersTransitionOnBackEnabled(boolean headersBackStackEnabled) { 944 mHeadersBackStackEnabled = headersBackStackEnabled; 945 } 946 947 /** 948 * Returns true if headers transition on back key support is enabled. 949 */ 950 public final boolean isHeadersTransitionOnBackEnabled() { 951 return mHeadersBackStackEnabled; 952 } 953 954 private void readArguments(Bundle args) { 955 if (args == null) { 956 return; 957 } 958 if (args.containsKey(ARG_TITLE)) { 959 setTitle(args.getString(ARG_TITLE)); 960 } 961 if (args.containsKey(ARG_HEADERS_STATE)) { 962 setHeadersState(args.getInt(ARG_HEADERS_STATE)); 963 } 964 } 965 966 /** 967 * Sets the drawable displayed in the browse fragment title. 968 * 969 * @param drawable The Drawable to display in the browse fragment title. 970 */ 971 public void setBadgeDrawable(Drawable drawable) { 972 if (mBadgeDrawable != drawable) { 973 mBadgeDrawable = drawable; 974 if (mTitleView != null) { 975 mTitleView.setBadgeDrawable(drawable); 976 } 977 } 978 } 979 980 /** 981 * Returns the badge drawable used in the fragment title. 982 */ 983 public Drawable getBadgeDrawable() { 984 return mBadgeDrawable; 985 } 986 987 /** 988 * Sets a title for the browse fragment. 989 * 990 * @param title The title of the browse fragment. 991 */ 992 public void setTitle(String title) { 993 mTitle = title; 994 if (mTitleView != null) { 995 mTitleView.setTitle(title); 996 } 997 } 998 999 /** 1000 * Returns the title for the browse fragment. 1001 */ 1002 public String getTitle() { 1003 return mTitle; 1004 } 1005 1006 /** 1007 * Sets the state for the headers column in the browse fragment. Must be one 1008 * of {@link #HEADERS_ENABLED}, {@link #HEADERS_HIDDEN}, or 1009 * {@link #HEADERS_DISABLED}. 1010 * 1011 * @param headersState The state of the headers for the browse fragment. 1012 */ 1013 public void setHeadersState(int headersState) { 1014 if (headersState < HEADERS_ENABLED || headersState > HEADERS_DISABLED) { 1015 throw new IllegalArgumentException("Invalid headers state: " + headersState); 1016 } 1017 if (DEBUG) Log.v(TAG, "setHeadersState " + headersState); 1018 1019 if (headersState != mHeadersState) { 1020 mHeadersState = headersState; 1021 switch (headersState) { 1022 case HEADERS_ENABLED: 1023 mCanShowHeaders = true; 1024 mShowingHeaders = true; 1025 break; 1026 case HEADERS_HIDDEN: 1027 mCanShowHeaders = true; 1028 mShowingHeaders = false; 1029 break; 1030 case HEADERS_DISABLED: 1031 mCanShowHeaders = false; 1032 mShowingHeaders = false; 1033 break; 1034 default: 1035 Log.w(TAG, "Unknown headers state: " + headersState); 1036 break; 1037 } 1038 if (mHeadersSupportFragment != null) { 1039 mHeadersSupportFragment.setHeadersGone(!mCanShowHeaders); 1040 } 1041 } 1042 } 1043 1044 /** 1045 * Returns the state of the headers column in the browse fragment. 1046 */ 1047 public int getHeadersState() { 1048 return mHeadersState; 1049 } 1050} 1051 1052