BrowseFragment.java revision 7121d4307443933ec8b680e4fc0b9bf6ddea66ab
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.TransitionHelper; 18import android.support.v17.leanback.transition.TransitionListener; 19import android.support.v17.leanback.widget.BrowseFrameLayout; 20import android.support.v17.leanback.widget.HorizontalGridView; 21import android.support.v17.leanback.widget.ItemBridgeAdapter; 22import android.support.v17.leanback.widget.OnItemViewClickedListener; 23import android.support.v17.leanback.widget.OnItemViewSelectedListener; 24import android.support.v17.leanback.widget.Presenter; 25import android.support.v17.leanback.widget.PresenterSelector; 26import android.support.v17.leanback.widget.RowPresenter; 27import android.support.v17.leanback.widget.TitleView; 28import android.support.v17.leanback.widget.VerticalGridView; 29import android.support.v17.leanback.widget.Row; 30import android.support.v17.leanback.widget.ObjectAdapter; 31import android.support.v17.leanback.widget.OnItemSelectedListener; 32import android.support.v17.leanback.widget.OnItemClickedListener; 33import android.support.v17.leanback.widget.SearchOrbView; 34import android.util.Log; 35import android.app.Activity; 36import android.app.Fragment; 37import android.app.FragmentManager; 38import android.app.FragmentManager.BackStackEntry; 39import android.content.Context; 40import android.content.res.TypedArray; 41import android.os.Bundle; 42import android.view.LayoutInflater; 43import android.view.View; 44import android.view.View.OnClickListener; 45import android.view.ViewGroup; 46import android.view.ViewGroup.MarginLayoutParams; 47import android.graphics.Color; 48import android.graphics.Rect; 49import android.graphics.drawable.Drawable; 50 51import static android.support.v7.widget.RecyclerView.NO_POSITION; 52 53/** 54 * A fragment for creating Leanback browse screens. It is composed of a 55 * RowsFragment and a HeadersFragment. 56 * <p> 57 * A BrowseFragment renders the elements of its {@link ObjectAdapter} as a set 58 * of rows in a vertical list. The elements in this adapter must be subclasses 59 * of {@link Row}. 60 * <p> 61 * The HeadersFragment can be set to be either shown or hidden by default, or 62 * may be disabled entirely. See {@link #setHeadersState} for details. 63 * <p> 64 * By default the BrowseFragment includes support for returning to the headers 65 * when the user presses Back. For Activities that customize {@link 66 * android.app.Activity#onBackPressed()}, you must disable this default Back key support by 67 * calling {@link #setHeadersTransitionOnBackEnabled(boolean)} with false and 68 * use {@link BrowseFragment.BrowseTransitionListener} and 69 * {@link #startHeadersTransition(boolean)}. 70 */ 71public class BrowseFragment extends Fragment { 72 73 // BUNDLE attribute for saving header show/hide status when backstack is used: 74 static final String HEADER_STACK_INDEX = "headerStackIndex"; 75 // BUNDLE attribute for saving header show/hide status when backstack is not used: 76 static final String HEADER_SHOW = "headerShow"; 77 // BUNDLE attribute for title is showing 78 static final String TITLE_SHOW = "titleShow"; 79 80 final class BackStackListener implements FragmentManager.OnBackStackChangedListener { 81 int mLastEntryCount; 82 int mIndexOfHeadersBackStack; 83 84 BackStackListener() { 85 mLastEntryCount = getFragmentManager().getBackStackEntryCount(); 86 mIndexOfHeadersBackStack = -1; 87 } 88 89 void load(Bundle savedInstanceState) { 90 if (savedInstanceState != null) { 91 mIndexOfHeadersBackStack = savedInstanceState.getInt(HEADER_STACK_INDEX, -1); 92 mShowingHeaders = mIndexOfHeadersBackStack == -1; 93 } else { 94 if (!mShowingHeaders) { 95 getFragmentManager().beginTransaction() 96 .addToBackStack(mWithHeadersBackStackName).commit(); 97 } 98 } 99 } 100 101 void save(Bundle outState) { 102 outState.putInt(HEADER_STACK_INDEX, mIndexOfHeadersBackStack); 103 } 104 105 106 @Override 107 public void onBackStackChanged() { 108 if (getFragmentManager() == null) { 109 Log.w(TAG, "getFragmentManager() is null, stack:", new Exception()); 110 return; 111 } 112 int count = getFragmentManager().getBackStackEntryCount(); 113 // if backstack is growing and last pushed entry is "headers" backstack, 114 // remember the index of the entry. 115 if (count > mLastEntryCount) { 116 BackStackEntry entry = getFragmentManager().getBackStackEntryAt(count - 1); 117 if (mWithHeadersBackStackName.equals(entry.getName())) { 118 mIndexOfHeadersBackStack = count - 1; 119 } 120 } else if (count < mLastEntryCount) { 121 // if popped "headers" backstack, initiate the show header transition if needed 122 if (mIndexOfHeadersBackStack >= count) { 123 mIndexOfHeadersBackStack = -1; 124 if (!mShowingHeaders) { 125 startHeadersTransitionInternal(true); 126 } 127 } 128 } 129 mLastEntryCount = count; 130 } 131 } 132 133 /** 134 * Listener for transitions between browse headers and rows. 135 */ 136 public static class BrowseTransitionListener { 137 /** 138 * Callback when headers transition starts. 139 * 140 * @param withHeaders True if the transition will result in headers 141 * being shown, false otherwise. 142 */ 143 public void onHeadersTransitionStart(boolean withHeaders) { 144 } 145 /** 146 * Callback when headers transition stops. 147 * 148 * @param withHeaders True if the transition will result in headers 149 * being shown, false otherwise. 150 */ 151 public void onHeadersTransitionStop(boolean withHeaders) { 152 } 153 } 154 155 private static final String TAG = "BrowseFragment"; 156 157 private static final String LB_HEADERS_BACKSTACK = "lbHeadersBackStack_"; 158 159 private static boolean DEBUG = false; 160 161 /** The headers fragment is enabled and shown by default. */ 162 public static final int HEADERS_ENABLED = 1; 163 164 /** The headers fragment is enabled and hidden by default. */ 165 public static final int HEADERS_HIDDEN = 2; 166 167 /** The headers fragment is disabled and will never be shown. */ 168 public static final int HEADERS_DISABLED = 3; 169 170 private static final float SLIDE_DISTANCE_FACTOR = 2; 171 172 private RowsFragment mRowsFragment; 173 private HeadersFragment mHeadersFragment; 174 175 private ObjectAdapter mAdapter; 176 177 private String mTitle; 178 private Drawable mBadgeDrawable; 179 private int mHeadersState = HEADERS_ENABLED; 180 private int mBrandColor = Color.TRANSPARENT; 181 private boolean mBrandColorSet; 182 183 private BrowseFrameLayout mBrowseFrame; 184 private TitleView mTitleView; 185 private boolean mShowingTitle = true; 186 private boolean mHeadersBackStackEnabled = true; 187 private String mWithHeadersBackStackName; 188 private boolean mShowingHeaders = true; 189 private boolean mCanShowHeaders = true; 190 private int mContainerListMarginLeft; 191 private int mContainerListAlignTop; 192 private boolean mRowScaleEnabled = true; 193 private SearchOrbView.Colors mSearchAffordanceColors; 194 private boolean mSearchAffordanceColorSet; 195 private OnItemSelectedListener mExternalOnItemSelectedListener; 196 private OnClickListener mExternalOnSearchClickedListener; 197 private OnItemClickedListener mOnItemClickedListener; 198 private OnItemViewSelectedListener mExternalOnItemViewSelectedListener; 199 private OnItemViewClickedListener mOnItemViewClickedListener; 200 private int mSelectedPosition = -1; 201 202 private PresenterSelector mHeaderPresenterSelector; 203 204 // transition related: 205 private static TransitionHelper sTransitionHelper = TransitionHelper.getInstance(); 206 private int mReparentHeaderId = View.generateViewId(); 207 private Object mSceneWithTitle; 208 private Object mSceneWithoutTitle; 209 private Object mSceneWithHeaders; 210 private Object mSceneWithoutHeaders; 211 private Object mTitleUpTransition; 212 private Object mTitleDownTransition; 213 private Object mHeadersTransition; 214 private int mHeadersTransitionStartDelay; 215 private int mHeadersTransitionDuration; 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 fragment is disabled, just return null. 527 if (!mCanShowHeaders) return null; 528 529 final View searchOrbView = mTitleView.getSearchAffordanceView(); 530 // if headers is running transition, focus stays 531 if (isInHeadersTransition()) return focused; 532 if (DEBUG) Log.v(TAG, "onFocusSearch focused " + focused + " + direction " + direction); 533 if (direction == View.FOCUS_LEFT) { 534 if (isVerticalScrolling() || mShowingHeaders) { 535 return focused; 536 } 537 return mHeadersFragment.getVerticalGridView(); 538 } else if (direction == View.FOCUS_RIGHT) { 539 if (isVerticalScrolling() || !mShowingHeaders) { 540 return focused; 541 } 542 return mRowsFragment.getVerticalGridView(); 543 } else if (focused == searchOrbView && direction == View.FOCUS_DOWN) { 544 return mShowingHeaders ? mHeadersFragment.getVerticalGridView() : 545 mRowsFragment.getVerticalGridView(); 546 547 } else if (focused != searchOrbView && searchOrbView.getVisibility() == View.VISIBLE 548 && direction == View.FOCUS_UP) { 549 return searchOrbView; 550 551 } else { 552 return null; 553 } 554 } 555 }; 556 557 private final BrowseFrameLayout.OnChildFocusListener mOnChildFocusListener = 558 new BrowseFrameLayout.OnChildFocusListener() { 559 560 @Override 561 public boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { 562 // Make sure not changing focus when requestFocus() is called. 563 if (mCanShowHeaders && mShowingHeaders) { 564 if (mHeadersFragment.getView().requestFocus(direction, previouslyFocusedRect)) { 565 return true; 566 } 567 } 568 if (mRowsFragment.getView().requestFocus(direction, previouslyFocusedRect)) { 569 return true; 570 } 571 return mTitleView.requestFocus(direction, previouslyFocusedRect); 572 }; 573 574 @Override 575 public void onRequestChildFocus(View child, View focused) { 576 int childId = child.getId(); 577 if (!mCanShowHeaders || isInHeadersTransition()) return; 578 if (childId == R.id.browse_container_dock && mShowingHeaders) { 579 startHeadersTransitionInternal(false); 580 } else if (childId == R.id.browse_headers_dock && !mShowingHeaders) { 581 startHeadersTransitionInternal(true); 582 } 583 } 584 }; 585 586 @Override 587 public void onSaveInstanceState(Bundle outState) { 588 if (mBackStackChangedListener != null) { 589 mBackStackChangedListener.save(outState); 590 } else { 591 outState.putBoolean(HEADER_SHOW, mShowingHeaders); 592 } 593 outState.putBoolean(TITLE_SHOW, mShowingTitle); 594 } 595 596 @Override 597 public void onCreate(Bundle savedInstanceState) { 598 super.onCreate(savedInstanceState); 599 TypedArray ta = getActivity().obtainStyledAttributes(R.styleable.LeanbackTheme); 600 mContainerListMarginLeft = (int) ta.getDimension( 601 R.styleable.LeanbackTheme_browseRowsMarginStart, 0); 602 mContainerListAlignTop = (int) ta.getDimension( 603 R.styleable.LeanbackTheme_browseRowsMarginTop, 0); 604 ta.recycle(); 605 606 mHeadersTransitionStartDelay = getResources() 607 .getInteger(R.integer.lb_browse_headers_transition_delay); 608 mHeadersTransitionDuration = getResources() 609 .getInteger(R.integer.lb_browse_headers_transition_duration); 610 611 readArguments(getArguments()); 612 613 } 614 615 @Override 616 public void onDestroy() { 617 if (mBackStackChangedListener != null) { 618 getFragmentManager().removeOnBackStackChangedListener(mBackStackChangedListener); 619 } 620 super.onDestroy(); 621 } 622 623 @Override 624 public View onCreateView(LayoutInflater inflater, ViewGroup container, 625 Bundle savedInstanceState) { 626 if (getChildFragmentManager().findFragmentById(R.id.browse_container_dock) == null) { 627 mRowsFragment = new RowsFragment(); 628 mHeadersFragment = new HeadersFragment(); 629 getChildFragmentManager().beginTransaction() 630 .replace(R.id.browse_headers_dock, mHeadersFragment) 631 .replace(R.id.browse_container_dock, mRowsFragment).commit(); 632 } else { 633 mHeadersFragment = (HeadersFragment) getChildFragmentManager() 634 .findFragmentById(R.id.browse_headers_dock); 635 mRowsFragment = (RowsFragment) getChildFragmentManager() 636 .findFragmentById(R.id.browse_container_dock); 637 } 638 639 mHeadersFragment.setHeadersGone(!mCanShowHeaders); 640 641 mRowsFragment.setAdapter(mAdapter); 642 if (mHeaderPresenterSelector != null) { 643 mHeadersFragment.setPresenterSelector(mHeaderPresenterSelector); 644 } 645 mHeadersFragment.setAdapter(mAdapter); 646 647 mRowsFragment.enableRowScaling(mRowScaleEnabled); 648 mRowsFragment.setOnItemSelectedListener(mRowSelectedListener); 649 mRowsFragment.setOnItemViewSelectedListener(mRowViewSelectedListener); 650 mHeadersFragment.setOnItemSelectedListener(mHeaderSelectedListener); 651 mHeadersFragment.setOnHeaderClickedListener(mHeaderClickedListener); 652 mRowsFragment.setOnItemClickedListener(mOnItemClickedListener); 653 mRowsFragment.setOnItemViewClickedListener(mOnItemViewClickedListener); 654 655 View root = inflater.inflate(R.layout.lb_browse_fragment, container, false); 656 657 mBrowseFrame = (BrowseFrameLayout) root.findViewById(R.id.browse_frame); 658 mBrowseFrame.setOnFocusSearchListener(mOnFocusSearchListener); 659 mBrowseFrame.setOnChildFocusListener(mOnChildFocusListener); 660 661 mTitleView = (TitleView) root.findViewById(R.id.browse_title_group); 662 mTitleView.setTitle(mTitle); 663 mTitleView.setBadgeDrawable(mBadgeDrawable); 664 if (mSearchAffordanceColorSet) { 665 mTitleView.setSearchAffordanceColors(mSearchAffordanceColors); 666 } 667 if (mExternalOnSearchClickedListener != null) { 668 mTitleView.setOnSearchClickedListener(mExternalOnSearchClickedListener); 669 } 670 671 if (mBrandColorSet) { 672 mHeadersFragment.setBackgroundColor(mBrandColor); 673 } 674 675 mSceneWithTitle = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 676 @Override 677 public void run() { 678 mTitleView.setVisibility(View.VISIBLE); 679 } 680 }); 681 mSceneWithoutTitle = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 682 @Override 683 public void run() { 684 mTitleView.setVisibility(View.INVISIBLE); 685 } 686 }); 687 mSceneWithHeaders = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 688 @Override 689 public void run() { 690 showHeaders(true); 691 } 692 }); 693 mSceneWithoutHeaders = sTransitionHelper.createScene(mBrowseFrame, new Runnable() { 694 @Override 695 public void run() { 696 showHeaders(false); 697 } 698 }); 699 mTitleUpTransition = TitleTransitionHelper.createTransitionTitleUp(sTransitionHelper); 700 mTitleDownTransition = TitleTransitionHelper.createTransitionTitleDown(sTransitionHelper); 701 702 sTransitionHelper.excludeChildren(mTitleUpTransition, R.id.browse_headers, true); 703 sTransitionHelper.excludeChildren(mTitleDownTransition, R.id.browse_headers, true); 704 sTransitionHelper.excludeChildren(mTitleUpTransition, R.id.container_list, true); 705 sTransitionHelper.excludeChildren(mTitleDownTransition, R.id.container_list, true); 706 707 if (mCanShowHeaders) { 708 if (mHeadersBackStackEnabled) { 709 mWithHeadersBackStackName = LB_HEADERS_BACKSTACK + this; 710 mBackStackChangedListener = new BackStackListener(); 711 getFragmentManager().addOnBackStackChangedListener(mBackStackChangedListener); 712 mBackStackChangedListener.load(savedInstanceState); 713 } else { 714 if (savedInstanceState != null) { 715 mShowingHeaders = savedInstanceState.getBoolean(HEADER_SHOW); 716 } 717 } 718 } 719 if (savedInstanceState != null) { 720 mShowingTitle = savedInstanceState.getBoolean(TITLE_SHOW); 721 } 722 mTitleView.setVisibility(mShowingTitle ? View.VISIBLE: View.INVISIBLE); 723 724 return root; 725 } 726 727 private void createHeadersTransition() { 728 mHeadersTransition = sTransitionHelper.createTransitionSet(false); 729 sTransitionHelper.excludeChildren(mHeadersTransition, R.id.browse_title_group, true); 730 Object changeBounds = sTransitionHelper.createChangeBounds(false); 731 Object fadeIn = sTransitionHelper.createFadeTransition(TransitionHelper.FADE_IN); 732 Object fadeOut = sTransitionHelper.createFadeTransition(TransitionHelper.FADE_OUT); 733 Object scale = sTransitionHelper.createScale(); 734 if (TransitionHelper.systemSupportsTransitions()) { 735 Context context = getView().getContext(); 736 sTransitionHelper.setInterpolator(changeBounds, 737 sTransitionHelper.createDefaultInterpolator(context)); 738 sTransitionHelper.setInterpolator(fadeIn, 739 sTransitionHelper.createDefaultInterpolator(context)); 740 sTransitionHelper.setInterpolator(fadeOut, 741 sTransitionHelper.createDefaultInterpolator(context)); 742 sTransitionHelper.setInterpolator(scale, 743 sTransitionHelper.createDefaultInterpolator(context)); 744 } 745 746 sTransitionHelper.setDuration(fadeOut, mHeadersTransitionDuration); 747 sTransitionHelper.addTransition(mHeadersTransition, fadeOut); 748 749 if (mShowingHeaders) { 750 sTransitionHelper.setStartDelay(changeBounds, mHeadersTransitionStartDelay); 751 sTransitionHelper.setStartDelay(scale, mHeadersTransitionStartDelay); 752 } 753 sTransitionHelper.setDuration(changeBounds, mHeadersTransitionDuration); 754 sTransitionHelper.addTransition(mHeadersTransition, changeBounds); 755 sTransitionHelper.addTarget(scale, mRowsFragment.getVerticalGridView()); 756 sTransitionHelper.setDuration(scale, mHeadersTransitionDuration); 757 sTransitionHelper.addTransition(mHeadersTransition, scale); 758 759 sTransitionHelper.setDuration(fadeIn, mHeadersTransitionDuration); 760 sTransitionHelper.setStartDelay(fadeIn, mHeadersTransitionStartDelay); 761 sTransitionHelper.addTransition(mHeadersTransition, fadeIn); 762 763 sTransitionHelper.setTransitionListener(mHeadersTransition, new TransitionListener() { 764 @Override 765 public void onTransitionStart(Object transition) { 766 } 767 @Override 768 public void onTransitionEnd(Object transition) { 769 mHeadersTransition = null; 770 mRowsFragment.onTransitionEnd(); 771 mHeadersFragment.onTransitionEnd(); 772 if (mShowingHeaders) { 773 VerticalGridView headerGridView = mHeadersFragment.getVerticalGridView(); 774 if (headerGridView != null && !headerGridView.hasFocus()) { 775 headerGridView.requestFocus(); 776 } 777 } else { 778 VerticalGridView rowsGridView = mRowsFragment.getVerticalGridView(); 779 if (rowsGridView != null && !rowsGridView.hasFocus()) { 780 rowsGridView.requestFocus(); 781 } 782 } 783 if (mBrowseTransitionListener != null) { 784 mBrowseTransitionListener.onHeadersTransitionStop(mShowingHeaders); 785 } 786 } 787 }); 788 } 789 790 /** 791 * Sets the {@link PresenterSelector} used to render the row headers. 792 * 793 * @param headerPresenterSelector The PresenterSelector that will determine 794 * the Presenter for each row header. 795 */ 796 public void setHeaderPresenterSelector(PresenterSelector headerPresenterSelector) { 797 mHeaderPresenterSelector = headerPresenterSelector; 798 if (mHeadersFragment != null) { 799 mHeadersFragment.setPresenterSelector(mHeaderPresenterSelector); 800 } 801 } 802 803 private void showHeaders(boolean show) { 804 if (DEBUG) Log.v(TAG, "showHeaders " + show); 805 mHeadersFragment.setHeadersEnabled(show); 806 MarginLayoutParams lp; 807 View containerList; 808 809 containerList = mRowsFragment.getView(); 810 lp = (MarginLayoutParams) containerList.getLayoutParams(); 811 lp.leftMargin = show ? mContainerListMarginLeft : 0; 812 containerList.setLayoutParams(lp); 813 814 containerList = mHeadersFragment.getView(); 815 lp = (MarginLayoutParams) containerList.getLayoutParams(); 816 lp.leftMargin = show ? 0 : -mContainerListMarginLeft; 817 containerList.setLayoutParams(lp); 818 819 mRowsFragment.setExpand(!show); 820 } 821 822 private HeadersFragment.OnHeaderClickedListener mHeaderClickedListener = 823 new HeadersFragment.OnHeaderClickedListener() { 824 @Override 825 public void onHeaderClicked() { 826 if (!mCanShowHeaders || !mShowingHeaders || isInHeadersTransition()) { 827 return; 828 } 829 startHeadersTransitionInternal(false); 830 mRowsFragment.getVerticalGridView().requestFocus(); 831 } 832 }; 833 834 private OnItemViewSelectedListener mRowViewSelectedListener = new OnItemViewSelectedListener() { 835 @Override 836 public void onItemSelected(Presenter.ViewHolder itemViewHolder, Object item, 837 RowPresenter.ViewHolder rowViewHolder, Row row) { 838 int position = mRowsFragment.getVerticalGridView().getSelectedPosition(); 839 if (DEBUG) Log.v(TAG, "row selected position " + position); 840 onRowSelected(position); 841 if (mExternalOnItemViewSelectedListener != null) { 842 mExternalOnItemViewSelectedListener.onItemSelected(itemViewHolder, item, 843 rowViewHolder, row); 844 } 845 } 846 }; 847 848 private OnItemSelectedListener mRowSelectedListener = new OnItemSelectedListener() { 849 @Override 850 public void onItemSelected(Object item, Row row) { 851 if (mExternalOnItemSelectedListener != null) { 852 mExternalOnItemSelectedListener.onItemSelected(item, row); 853 } 854 } 855 }; 856 857 private OnItemSelectedListener mHeaderSelectedListener = new OnItemSelectedListener() { 858 @Override 859 public void onItemSelected(Object item, Row row) { 860 int position = mHeadersFragment.getVerticalGridView().getSelectedPosition(); 861 if (DEBUG) Log.v(TAG, "header selected position " + position); 862 onRowSelected(position); 863 } 864 }; 865 866 private void onRowSelected(int position) { 867 if (position != mSelectedPosition) { 868 mSetSelectionRunnable.mPosition = position; 869 mBrowseFrame.getHandler().post(mSetSelectionRunnable); 870 871 if (getAdapter() == null || getAdapter().size() == 0 || position == 0) { 872 if (!mShowingTitle) { 873 sTransitionHelper.runTransition(mSceneWithTitle, mTitleDownTransition); 874 mShowingTitle = true; 875 } 876 } else if (mShowingTitle) { 877 sTransitionHelper.runTransition(mSceneWithoutTitle, mTitleUpTransition); 878 mShowingTitle = false; 879 } 880 } 881 } 882 883 private class SetSelectionRunnable implements Runnable { 884 int mPosition; 885 @Override 886 public void run() { 887 setSelection(mPosition); 888 } 889 } 890 891 private final SetSelectionRunnable mSetSelectionRunnable = new SetSelectionRunnable(); 892 893 private void setSelection(int position) { 894 if (position != NO_POSITION) { 895 mRowsFragment.setSelectedPosition(position); 896 mHeadersFragment.setSelectedPosition(position); 897 } 898 mSelectedPosition = position; 899 } 900 901 @Override 902 public void onStart() { 903 super.onStart(); 904 mHeadersFragment.setWindowAlignmentFromTop(mContainerListAlignTop); 905 mHeadersFragment.setItemAlignment(); 906 mRowsFragment.setWindowAlignmentFromTop(mContainerListAlignTop); 907 mRowsFragment.setItemAlignment(); 908 909 mRowsFragment.getVerticalGridView().setPivotX(0); 910 mRowsFragment.getVerticalGridView().setPivotY(mContainerListAlignTop); 911 912 if (mCanShowHeaders && mShowingHeaders && mHeadersFragment.getView() != null) { 913 mHeadersFragment.getView().requestFocus(); 914 } else if ((!mCanShowHeaders || !mShowingHeaders) 915 && mRowsFragment.getView() != null) { 916 mRowsFragment.getView().requestFocus(); 917 } 918 if (mCanShowHeaders) { 919 showHeaders(mShowingHeaders); 920 } 921 } 922 923 /** 924 * Enable/disable headers transition on back key support. This is enabled by 925 * default. The BrowseFragment will add a back stack entry when headers are 926 * showing. Running a headers transition when the back key is pressed only 927 * works when the headers state is {@link #HEADERS_ENABLED} or 928 * {@link #HEADERS_HIDDEN}. 929 * <p> 930 * NOTE: If an Activity has its own onBackPressed() handling, you must 931 * disable this feature. You may use {@link #startHeadersTransition(boolean)} 932 * and {@link BrowseTransitionListener} in your own back stack handling. 933 */ 934 public final void setHeadersTransitionOnBackEnabled(boolean headersBackStackEnabled) { 935 mHeadersBackStackEnabled = headersBackStackEnabled; 936 } 937 938 /** 939 * Returns true if headers transition on back key support is enabled. 940 */ 941 public final boolean isHeadersTransitionOnBackEnabled() { 942 return mHeadersBackStackEnabled; 943 } 944 945 private void readArguments(Bundle args) { 946 if (args == null) { 947 return; 948 } 949 if (args.containsKey(ARG_TITLE)) { 950 setTitle(args.getString(ARG_TITLE)); 951 } 952 if (args.containsKey(ARG_HEADERS_STATE)) { 953 setHeadersState(args.getInt(ARG_HEADERS_STATE)); 954 } 955 } 956 957 /** 958 * Sets the drawable displayed in the browse fragment title. 959 * 960 * @param drawable The Drawable to display in the browse fragment title. 961 */ 962 public void setBadgeDrawable(Drawable drawable) { 963 if (mBadgeDrawable != drawable) { 964 mBadgeDrawable = drawable; 965 if (mTitleView != null) { 966 mTitleView.setBadgeDrawable(drawable); 967 } 968 } 969 } 970 971 /** 972 * Returns the badge drawable used in the fragment title. 973 */ 974 public Drawable getBadgeDrawable() { 975 return mBadgeDrawable; 976 } 977 978 /** 979 * Sets a title for the browse fragment. 980 * 981 * @param title The title of the browse fragment. 982 */ 983 public void setTitle(String title) { 984 mTitle = title; 985 if (mTitleView != null) { 986 mTitleView.setTitle(title); 987 } 988 } 989 990 /** 991 * Returns the title for the browse fragment. 992 */ 993 public String getTitle() { 994 return mTitle; 995 } 996 997 /** 998 * Sets the state for the headers column in the browse fragment. Must be one 999 * of {@link #HEADERS_ENABLED}, {@link #HEADERS_HIDDEN}, or 1000 * {@link #HEADERS_DISABLED}. 1001 * 1002 * @param headersState The state of the headers for the browse fragment. 1003 */ 1004 public void setHeadersState(int headersState) { 1005 if (headersState < HEADERS_ENABLED || headersState > HEADERS_DISABLED) { 1006 throw new IllegalArgumentException("Invalid headers state: " + headersState); 1007 } 1008 if (DEBUG) Log.v(TAG, "setHeadersState " + headersState); 1009 1010 if (headersState != mHeadersState) { 1011 mHeadersState = headersState; 1012 switch (headersState) { 1013 case HEADERS_ENABLED: 1014 mCanShowHeaders = true; 1015 mShowingHeaders = true; 1016 break; 1017 case HEADERS_HIDDEN: 1018 mCanShowHeaders = true; 1019 mShowingHeaders = false; 1020 break; 1021 case HEADERS_DISABLED: 1022 mCanShowHeaders = false; 1023 mShowingHeaders = false; 1024 break; 1025 default: 1026 Log.w(TAG, "Unknown headers state: " + headersState); 1027 break; 1028 } 1029 if (mHeadersFragment != null) { 1030 mHeadersFragment.setHeadersGone(!mCanShowHeaders); 1031 } 1032 } 1033 } 1034 1035 /** 1036 * Returns the state of the headers column in the browse fragment. 1037 */ 1038 public int getHeadersState() { 1039 return mHeadersState; 1040 } 1041} 1042 1043