dali-toolkit/internal/focus-manager/keyboard-focus-manager-impl.cpp

   1 /*
   2  * Copyright (c) 2017 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 // CLASS HEADER
  19 #include "keyboard-focus-manager-impl.h"
  20
  21 // EXTERNAL INCLUDES
  22 #include <cstring> // for strcmp
  23 #include <dali/public-api/actors/layer.h>
  24 #include <dali/devel-api/adaptor-framework/accessibility-adaptor.h>
  25 #include <dali/devel-api/adaptor-framework/singleton-service.h>
  26 #include <dali/public-api/animation/constraints.h>
  27 #include <dali/public-api/common/stage.h>
  28 #include <dali/public-api/events/key-event.h>
  29 #include <dali/public-api/events/touch-data.h>
  30 #include <dali/public-api/object/type-registry.h>
  31 #include <dali/public-api/object/type-registry-helper.h>
  32 #include <dali/public-api/images/resource-image.h>
  33 #include <dali/integration-api/debug.h>
  34
  35 // INTERNAL INCLUDES
  36 #include <dali-toolkit/public-api/controls/control.h>
  37 #include <dali-toolkit/public-api/controls/control-impl.h>
  38 #include <dali-toolkit/public-api/controls/image-view/image-view.h>
  39 #include <dali-toolkit/public-api/accessibility-manager/accessibility-manager.h>
  40 #include <dali-toolkit/devel-api/controls/control-devel.h>
  41
  42 namespace Dali
  43 {
  44
  45 namespace Toolkit
  46 {
  47
  48 namespace Internal
  49 {
  50
  51 namespace // Unnamed namespace
  52 {
  53
  54 #if defined(DEBUG_ENABLED)
  55 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_KEYBOARD_FOCUS_MANAGER");
  56 #endif
  57
  58 const char* const IS_FOCUS_GROUP_PROPERTY_NAME = "isKeyboardFocusGroup"; // This property will be replaced by a flag in Control.
  59
  60 const char* const FOCUS_BORDER_IMAGE_PATH = DALI_IMAGE_DIR "keyboard_focus.9.png";
  61
  62 BaseHandle Create()
  63 {
  64   BaseHandle handle = KeyboardFocusManager::Get();
  65
  66   if ( !handle )
  67   {
  68     SingletonService singletonService( SingletonService::Get() );
  69     if ( singletonService )
  70     {
  71       Toolkit::KeyboardFocusManager manager = Toolkit::KeyboardFocusManager( new Internal::KeyboardFocusManager() );
  72       singletonService.Register( typeid( manager ), manager );
  73       handle = manager;
  74     }
  75   }
  76
  77   return handle;
  78 }
  79
  80 DALI_TYPE_REGISTRATION_BEGIN_CREATE( Toolkit::KeyboardFocusManager, Dali::BaseHandle, Create, true )
  81
  82 DALI_SIGNAL_REGISTRATION( Toolkit, KeyboardFocusManager, "keyboardPreFocusChange",           SIGNAL_PRE_FOCUS_CHANGE )
  83 DALI_SIGNAL_REGISTRATION( Toolkit, KeyboardFocusManager, "keyboardFocusChanged",             SIGNAL_FOCUS_CHANGED )
  84 DALI_SIGNAL_REGISTRATION( Toolkit, KeyboardFocusManager, "keyboardFocusGroupChanged",        SIGNAL_FOCUS_GROUP_CHANGED )
  85 DALI_SIGNAL_REGISTRATION( Toolkit, KeyboardFocusManager, "keyboardFocusedActorEnterKey",     SIGNAL_FOCUSED_ACTOR_ENTER_KEY )
  86
  87 DALI_TYPE_REGISTRATION_END()
  88
  89 const unsigned int MAX_HISTORY_AMOUNT = 30; ///< Max length of focus history stack
  90
  91 } // unnamed namespace
  92
  93 Toolkit::KeyboardFocusManager KeyboardFocusManager::Get()
  94 {
  95   Toolkit::KeyboardFocusManager manager;
  96
  97   SingletonService singletonService( SingletonService::Get() );
  98   if ( singletonService )
  99   {
 100     // Check whether the keyboard focus manager is already created
 101     Dali::BaseHandle handle = singletonService.GetSingleton( typeid( Toolkit::KeyboardFocusManager ) );
 102     if(handle)
 103     {
 104       // If so, downcast the handle of singleton to keyboard focus manager
 105       manager = Toolkit::KeyboardFocusManager( dynamic_cast< KeyboardFocusManager* >( handle.GetObjectPtr() ) );
 106     }
 107   }
 108
 109   return manager;
 110 }
 111
 112 KeyboardFocusManager::KeyboardFocusManager()
 113 : mPreFocusChangeSignal(),
 114   mFocusChangedSignal(),
 115   mFocusGroupChangedSignal(),
 116   mFocusedActorEnterKeySignal(),
 117   mCurrentFocusActor( 0 ),
 118   mFocusIndicatorActor(),
 119   mFocusGroupLoopEnabled( false ),
 120   mIsFocusIndicatorEnabled( false ),
 121   mIsWaitingKeyboardFocusChangeCommit( false ),
 122   mFocusHistory(),
 123   mSlotDelegate( this ),
 124   mCustomAlgorithmInterface(NULL)
 125 {
 126   // TODO: Get FocusIndicatorEnable constant from stylesheet to set mIsFocusIndicatorEnabled.
 127   Stage::GetCurrent().KeyEventSignal().Connect( mSlotDelegate, &KeyboardFocusManager::OnKeyEvent);
 128   Stage::GetCurrent().TouchSignal().Connect( mSlotDelegate, &KeyboardFocusManager::OnTouch );
 129 }
 130
 131 KeyboardFocusManager::~KeyboardFocusManager()
 132 {
 133 }
 134
 135 bool KeyboardFocusManager::SetCurrentFocusActor( Actor actor )
 136 {
 137   DALI_ASSERT_DEBUG( !mIsWaitingKeyboardFocusChangeCommit && "Calling this function in the PreFocusChangeSignal callback?" );
 138
 139   return DoSetCurrentFocusActor( actor );
 140 }
 141
 142 bool KeyboardFocusManager::DoSetCurrentFocusActor( Actor actor )
 143 {
 144   bool success = false;
 145
 146   // Check whether the actor is in the stage and is keyboard focusable.
 147   if( actor && actor.IsKeyboardFocusable() )
 148   {
 149     if( mIsFocusIndicatorEnabled )
 150     {
 151       actor.Add( GetFocusIndicatorActor() );
 152     }
 153     // Send notification for the change of focus actor
 154     Actor currentFocusedActor = GetCurrentFocusActor();
 155
 156     if( !mFocusChangedSignal.Empty() )
 157     {
 158       mFocusChangedSignal.Emit(currentFocusedActor, actor);
 159     }
 160
 161     Toolkit::Control currentlyFocusedControl = Toolkit::Control::DownCast(currentFocusedActor);
 162     if( currentlyFocusedControl )
 163     {
 164       // Do we need it to remember if it was previously DISABLED?
 165       currentlyFocusedControl.SetProperty(DevelControl::Property::STATE, DevelControl::NORMAL );
 166       currentlyFocusedControl.ClearKeyInputFocus();
 167     }
 168
 169     DALI_LOG_INFO( gLogFilter, Debug::General, "[%s:%d] Focus Changed\n", __FUNCTION__, __LINE__);
 170
 171     // Save the current focused actor
 172     mCurrentFocusActor = actor.GetId();
 173
 174     Toolkit::Control newlyFocusedControl = Toolkit::Control::DownCast(actor);
 175     if( newlyFocusedControl )
 176     {
 177       newlyFocusedControl.SetProperty(DevelControl::Property::STATE, DevelControl::FOCUSED );
 178       newlyFocusedControl.SetKeyInputFocus();
 179     }
 180
 181     // Push Current Focused Actor to FocusHistory
 182     mFocusHistory.PushBack( &actor.GetBaseObject() );
 183
 184     // Delete first element before add new element when Stack is full.
 185     if( mFocusHistory.Count() > MAX_HISTORY_AMOUNT )
 186     {
 187        FocusStackIterator beginPos = mFocusHistory.Begin();
 188        mFocusHistory.Erase( beginPos );
 189     }
 190
 191     DALI_LOG_INFO( gLogFilter, Debug::General, "[%s:%d] SUCCEED\n", __FUNCTION__, __LINE__);
 192     success = true;
 193   }
 194   else
 195   {
 196     DALI_LOG_WARNING("[%s:%d] FAILED\n", __FUNCTION__, __LINE__);
 197   }
 198
 199   return success;
 200 }
 201
 202 Actor KeyboardFocusManager::GetCurrentFocusActor()
 203 {
 204   Actor rootActor = Stage::GetCurrent().GetRootLayer();
 205   return rootActor.FindChildById(mCurrentFocusActor);
 206 }
 207
 208 Actor KeyboardFocusManager::GetCurrentFocusGroup()
 209 {
 210   return GetFocusGroup(GetCurrentFocusActor());
 211 }
 212
 213 void KeyboardFocusManager::MoveFocusBackward()
 214 {
 215   // Find Pre Focused Actor when the list size is more than 1
 216   if( mFocusHistory.Count() > 1 )
 217   {
 218     // Delete current focused actor in history
 219     FocusStackIterator endPos = mFocusHistory.End();
 220     endPos = mFocusHistory.Erase( --endPos );
 221
 222     // If pre-focused actors are not on stage, remove them in stack
 223     while( !Dali::Actor::DownCast(BaseHandle(mFocusHistory[ mFocusHistory.Count() - 1 ])).OnStage() )
 224     {
 225       endPos = mFocusHistory.Erase( --endPos );
 226     }
 227
 228     // Get pre focused actor
 229     BaseObject* object = mFocusHistory[ mFocusHistory.Count() - 1 ];
 230     BaseHandle handle( object );
 231     Actor preFocusedActor = Dali::Actor::DownCast( handle );
 232
 233     // Delete pre focused actor in history because it will pushed again by SetCurrentFocusActor()
 234     mFocusHistory.Erase( --endPos );
 235
 236     SetCurrentFocusActor( preFocusedActor );
 237  }
 238 }
 239
 240 bool KeyboardFocusManager::IsLayoutControl(Actor actor) const
 241 {
 242   Toolkit::Control control = Toolkit::Control::DownCast(actor);
 243   return control && GetImplementation( control ).IsKeyboardNavigationSupported();
 244 }
 245
 246 Toolkit::Control KeyboardFocusManager::GetParentLayoutControl(Actor actor) const
 247 {
 248   // Get the actor's parent layout control that supports two dimensional keyboard navigation
 249   Actor rootActor = Stage::GetCurrent().GetRootLayer();
 250   Actor parent;
 251   if(actor)
 252   {
 253     parent = actor.GetParent();
 254   }
 255
 256   while( parent && !IsLayoutControl(parent) && parent != rootActor )
 257   {
 258     parent = parent.GetParent();
 259   }
 260
 261   return Toolkit::Control::DownCast(parent);
 262 }
 263
 264 bool KeyboardFocusManager::MoveFocus(Toolkit::Control::KeyboardFocus::Direction direction)
 265 {
 266   Actor currentFocusActor = GetCurrentFocusActor();
 267
 268   bool succeed = false;
 269
 270   // Go through the actor's hierarchy until we find a layout control that knows how to move the focus
 271   Toolkit::Control parentLayoutControl = GetParentLayoutControl( currentFocusActor );
 272   while( parentLayoutControl && !succeed )
 273   {
 274     succeed = DoMoveFocusWithinLayoutControl( parentLayoutControl, currentFocusActor, direction );
 275     parentLayoutControl = GetParentLayoutControl( parentLayoutControl );
 276   }
 277
 278   if( !succeed )
 279   {
 280     Actor nextFocusableActor;
 281
 282     Toolkit::Control currentFocusControl = Toolkit::Control::DownCast(currentFocusActor);
 283
 284     // If the current focused actor is a control, then find the next focusable actor via the focusable properties.
 285     if( currentFocusControl )
 286     {
 287       int actorId = -1;
 288       Property::Index index = Property::INVALID_INDEX;
 289       Property::Value value;
 290
 291       // Find property index based upon focus direction
 292       switch ( direction )
 293       {
 294         case Toolkit::Control::KeyboardFocus::LEFT:
 295         {
 296           index = Toolkit::DevelControl::Property::LEFT_FOCUSABLE_ACTOR_ID;
 297           break;
 298         }
 299         case Toolkit::Control::KeyboardFocus::RIGHT:
 300         {
 301           index = Toolkit::DevelControl::Property::RIGHT_FOCUSABLE_ACTOR_ID;
 302           break;
 303         }
 304         case Toolkit::Control::KeyboardFocus::UP:
 305         {
 306           index = Toolkit::DevelControl::Property::UP_FOCUSABLE_ACTOR_ID;
 307           break;
 308         }
 309         case Toolkit::Control::KeyboardFocus::DOWN:
 310         {
 311           index = Toolkit::DevelControl::Property::DOWN_FOCUSABLE_ACTOR_ID;
 312           break;
 313         }
 314         default:
 315           break;
 316       }
 317
 318       // If the focusable property is set then determine next focusable actor
 319       if( index != Property::INVALID_INDEX)
 320       {
 321         value = currentFocusActor.GetProperty( index );
 322         actorId = value.Get<int>();
 323
 324         // If actor's id is valid then find actor form actor's id. The actor should be on the stage.
 325         if( actorId != -1 )
 326         {
 327           if( currentFocusActor.GetParent() )
 328           {
 329             nextFocusableActor = currentFocusActor.GetParent().FindChildById( actorId );
 330           }
 331
 332           if( !nextFocusableActor )
 333           {
 334             nextFocusableActor = Stage::GetCurrent().GetRootLayer().FindChildById( actorId );
 335           }
 336         }
 337       }
 338     }
 339
 340     if( !nextFocusableActor )
 341     {
 342       // If the implementation of CustomAlgorithmInterface is provided then the PreFocusChangeSignal is no longer emitted.
 343       if( mCustomAlgorithmInterface )
 344       {
 345         mIsWaitingKeyboardFocusChangeCommit = true;
 346         nextFocusableActor = mCustomAlgorithmInterface->GetNextFocusableActor( currentFocusActor, Actor(), direction );
 347         mIsWaitingKeyboardFocusChangeCommit = false;
 348       }
 349       else if( !mPreFocusChangeSignal.Empty() )
 350       {
 351         // Don't know how to move the focus further. The application needs to tell us which actor to move the focus to
 352         mIsWaitingKeyboardFocusChangeCommit = true;
 353         nextFocusableActor = mPreFocusChangeSignal.Emit( currentFocusActor, Actor(), direction );
 354         mIsWaitingKeyboardFocusChangeCommit = false;
 355       }
 356     }
 357
 358     if( nextFocusableActor && nextFocusableActor.IsKeyboardFocusable() )
 359     {
 360       // Whether the next focusable actor is a layout control
 361       if( IsLayoutControl( nextFocusableActor ) )
 362       {
 363         // If so, move the focus inside it.
 364         Toolkit::Control layoutControl = Toolkit::Control::DownCast( nextFocusableActor) ;
 365         succeed = DoMoveFocusWithinLayoutControl( layoutControl, currentFocusActor, direction );
 366       }
 367       else
 368       {
 369         // Otherwise, just set focus to the next focusable actor
 370         succeed = SetCurrentFocusActor( nextFocusableActor );
 371       }
 372     }
 373   }
 374
 375   return succeed;
 376 }
 377
 378 bool KeyboardFocusManager::DoMoveFocusWithinLayoutControl(Toolkit::Control control, Actor actor, Toolkit::Control::KeyboardFocus::Direction direction)
 379 {
 380   // Ask the control for the next actor to focus
 381   Actor nextFocusableActor = GetImplementation( control ).GetNextKeyboardFocusableActor(actor, direction, mFocusGroupLoopEnabled);
 382   if(nextFocusableActor)
 383   {
 384     if(!nextFocusableActor.IsKeyboardFocusable())
 385     {
 386       // If the actor is not focusable, ask the same layout control for the next actor to focus
 387       return DoMoveFocusWithinLayoutControl(control, nextFocusableActor, direction);
 388     }
 389     else
 390     {
 391       Actor currentFocusActor = GetCurrentFocusActor();
 392       Actor committedFocusActor = nextFocusableActor;
 393
 394       // We will try to move the focus to the actor. Emit a signal to notify the proposed actor to focus
 395       // Signal handler can check the proposed actor and return a different actor if it wishes.
 396       if( !mPreFocusChangeSignal.Empty() )
 397       {
 398         mIsWaitingKeyboardFocusChangeCommit = true;
 399         committedFocusActor = mPreFocusChangeSignal.Emit(currentFocusActor, nextFocusableActor, direction);
 400         mIsWaitingKeyboardFocusChangeCommit = false;
 401       }
 402
 403       if (committedFocusActor && committedFocusActor.IsKeyboardFocusable())
 404       {
 405         // Whether the commited focusable actor is a layout control
 406         if(IsLayoutControl(committedFocusActor))
 407         {
 408           // If so, move the focus inside it.
 409           Toolkit::Control layoutControl = Toolkit::Control::DownCast(committedFocusActor);
 410           return DoMoveFocusWithinLayoutControl(layoutControl, currentFocusActor, direction);
 411         }
 412         else
 413         {
 414           // Otherwise, just set focus to the next focusable actor
 415           if(committedFocusActor == nextFocusableActor)
 416           {
 417             // If the application hasn't changed our proposed actor, we informs the layout control we will
 418             // move the focus to what the control returns. The control might wish to perform some actions
 419             // before the focus is actually moved.
 420             GetImplementation( control ).OnKeyboardFocusChangeCommitted( committedFocusActor );
 421           }
 422
 423           return SetCurrentFocusActor(committedFocusActor);
 424         }
 425       }
 426       else
 427       {
 428         return false;
 429       }
 430     }
 431   }
 432   else
 433   {
 434     // No more actor can be focused in the given direction within the same layout control.
 435     return false;
 436   }
 437 }
 438
 439 bool KeyboardFocusManager::DoMoveFocusToNextFocusGroup(bool forward)
 440 {
 441   bool succeed = false;
 442
 443   // Get the parent layout control of the current focus group
 444   Toolkit::Control parentLayoutControl = GetParentLayoutControl(GetCurrentFocusGroup());
 445
 446   while(parentLayoutControl && !succeed)
 447   {
 448     // If the current focus group has a parent layout control, we can probably automatically
 449     // move the focus to the next focus group in the forward or backward direction.
 450     Toolkit::Control::KeyboardFocus::Direction direction = forward ? Toolkit::Control::KeyboardFocus::RIGHT : Toolkit::Control::KeyboardFocus::LEFT;
 451     succeed = DoMoveFocusWithinLayoutControl(parentLayoutControl, GetCurrentFocusActor(), direction);
 452     parentLayoutControl = GetParentLayoutControl(parentLayoutControl);
 453   }
 454
 455   if(!mFocusGroupChangedSignal.Empty())
 456   {
 457     // Emit a focus group changed signal. The applicaton can move the focus to a new focus group
 458     mFocusGroupChangedSignal.Emit(GetCurrentFocusActor(), forward);
 459   }
 460
 461   return succeed;
 462 }
 463
 464 void KeyboardFocusManager::DoKeyboardEnter(Actor actor)
 465 {
 466   if( actor )
 467   {
 468     Toolkit::Control control = Toolkit::Control::DownCast( actor );
 469     if( control )
 470     {
 471       // Notify the control that enter has been pressed on it.
 472       GetImplementation( control ).KeyboardEnter();
 473     }
 474
 475     // Send a notification for the actor.
 476     if( !mFocusedActorEnterKeySignal.Empty() )
 477     {
 478       mFocusedActorEnterKeySignal.Emit( actor );
 479     }
 480   }
 481 }
 482
 483 void KeyboardFocusManager::ClearFocus()
 484 {
 485   Actor actor = GetCurrentFocusActor();
 486   if( actor )
 487   {
 488     if( mFocusIndicatorActor )
 489     {
 490       actor.Remove( mFocusIndicatorActor );
 491     }
 492
 493     // Send notification for the change of focus actor
 494     if( !mFocusChangedSignal.Empty() )
 495     {
 496       mFocusChangedSignal.Emit( actor, Actor() );
 497     }
 498
 499     Toolkit::Control currentlyFocusedControl = Toolkit::Control::DownCast( actor );
 500     if( currentlyFocusedControl )
 501     {
 502       currentlyFocusedControl.SetProperty( DevelControl::Property::STATE, DevelControl::NORMAL );
 503       currentlyFocusedControl.ClearKeyInputFocus();
 504     }
 505   }
 506
 507   mCurrentFocusActor = 0;
 508   mIsFocusIndicatorEnabled = false;
 509 }
 510
 511 void KeyboardFocusManager::SetFocusGroupLoop(bool enabled)
 512 {
 513   mFocusGroupLoopEnabled = enabled;
 514 }
 515
 516 bool KeyboardFocusManager::GetFocusGroupLoop() const
 517 {
 518   return mFocusGroupLoopEnabled;
 519 }
 520
 521 void KeyboardFocusManager::SetAsFocusGroup(Actor actor, bool isFocusGroup)
 522 {
 523   if(actor)
 524   {
 525     // Create/Set focus group property.
 526     actor.RegisterProperty( IS_FOCUS_GROUP_PROPERTY_NAME, isFocusGroup, Property::READ_WRITE );
 527   }
 528 }
 529
 530 bool KeyboardFocusManager::IsFocusGroup(Actor actor) const
 531 {
 532   // Check whether the actor is a focus group
 533   bool isFocusGroup = false;
 534
 535   if(actor)
 536   {
 537     Property::Index propertyIsFocusGroup = actor.GetPropertyIndex(IS_FOCUS_GROUP_PROPERTY_NAME);
 538     if(propertyIsFocusGroup != Property::INVALID_INDEX)
 539     {
 540       isFocusGroup = actor.GetProperty<bool>(propertyIsFocusGroup);
 541     }
 542   }
 543
 544   return isFocusGroup;
 545 }
 546
 547 Actor KeyboardFocusManager::GetFocusGroup(Actor actor)
 548 {
 549   // Go through the actor's hierarchy to check which focus group the actor belongs to
 550   while (actor && !IsFocusGroup(actor))
 551   {
 552     actor = actor.GetParent();
 553   }
 554
 555   return actor;
 556 }
 557
 558 void KeyboardFocusManager::SetFocusIndicatorActor(Actor indicator)
 559 {
 560   if(mFocusIndicatorActor != indicator)
 561   {
 562     Actor currentFocusActor = GetCurrentFocusActor();
 563     if(currentFocusActor)
 564     {
 565       // The new focus indicator should be added to the current focused actor immediately
 566       if(mFocusIndicatorActor)
 567       {
 568         currentFocusActor.Remove(mFocusIndicatorActor);
 569       }
 570
 571       if(indicator)
 572       {
 573         currentFocusActor.Add(indicator);
 574       }
 575     }
 576
 577     mFocusIndicatorActor = indicator;
 578   }
 579 }
 580
 581 Actor KeyboardFocusManager::GetFocusIndicatorActor()
 582 {
 583   if( ! mFocusIndicatorActor )
 584   {
 585     // Create the default if it hasn't been set and one that's shared by all the keyboard focusable actors
 586     mFocusIndicatorActor = Toolkit::ImageView::New( FOCUS_BORDER_IMAGE_PATH );
 587
 588     // Apply size constraint to the focus indicator
 589     mFocusIndicatorActor.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
 590   }
 591
 592   mFocusIndicatorActor.SetParentOrigin( ParentOrigin::CENTER );
 593   mFocusIndicatorActor.SetAnchorPoint( AnchorPoint::CENTER );
 594   mFocusIndicatorActor.SetPosition(0.0f, 0.0f);
 595
 596   return mFocusIndicatorActor;
 597 }
 598
 599 void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
 600 {
 601   AccessibilityAdaptor accessibilityAdaptor = AccessibilityAdaptor::Get();
 602   bool isAccessibilityEnabled = accessibilityAdaptor.IsEnabled();
 603
 604   Toolkit::AccessibilityManager accessibilityManager = Toolkit::AccessibilityManager::Get();
 605
 606   std::string keyName = event.keyPressedName;
 607
 608   bool isFocusStartableKey = false;
 609
 610   if(event.state == KeyEvent::Down)
 611   {
 612     if (keyName == "Left")
 613     {
 614       if(!isAccessibilityEnabled)
 615       {
 616         if(!mIsFocusIndicatorEnabled)
 617         {
 618           // Show focus indicator
 619           mIsFocusIndicatorEnabled = true;
 620         }
 621         else
 622         {
 623           // Move the focus towards left
 624           MoveFocus(Toolkit::Control::KeyboardFocus::LEFT);
 625         }
 626
 627         isFocusStartableKey = true;
 628       }
 629       else
 630       {
 631         // Move the accessibility focus backward
 632         accessibilityManager.MoveFocusBackward();
 633       }
 634     }
 635     else if (keyName == "Right")
 636     {
 637       if(!isAccessibilityEnabled)
 638       {
 639         if(!mIsFocusIndicatorEnabled)
 640         {
 641           // Show focus indicator
 642           mIsFocusIndicatorEnabled = true;
 643         }
 644         else
 645         {
 646           // Move the focus towards right
 647           MoveFocus(Toolkit::Control::KeyboardFocus::RIGHT);
 648         }
 649       }
 650       else
 651       {
 652         // Move the accessibility focus forward
 653         accessibilityManager.MoveFocusForward();
 654       }
 655
 656       isFocusStartableKey = true;
 657     }
 658     else if (keyName == "Up" && !isAccessibilityEnabled)
 659     {
 660       if(!mIsFocusIndicatorEnabled)
 661       {
 662         // Show focus indicator
 663         mIsFocusIndicatorEnabled = true;
 664       }
 665       else
 666       {
 667         // Move the focus towards up
 668         MoveFocus(Toolkit::Control::KeyboardFocus::UP);
 669       }
 670
 671       isFocusStartableKey = true;
 672     }
 673     else if (keyName == "Down" && !isAccessibilityEnabled)
 674     {
 675       if(!mIsFocusIndicatorEnabled)
 676       {
 677         // Show focus indicator
 678         mIsFocusIndicatorEnabled = true;
 679       }
 680       else
 681       {
 682         // Move the focus towards down
 683         MoveFocus(Toolkit::Control::KeyboardFocus::DOWN);
 684       }
 685
 686       isFocusStartableKey = true;
 687     }
 688     else if (keyName == "Prior" && !isAccessibilityEnabled)
 689     {
 690       if(!mIsFocusIndicatorEnabled)
 691       {
 692         // Show focus indicator
 693         mIsFocusIndicatorEnabled = true;
 694       }
 695       else
 696       {
 697         // Move the focus towards the previous page
 698         MoveFocus(Toolkit::Control::KeyboardFocus::PAGE_UP);
 699       }
 700
 701       isFocusStartableKey = true;
 702     }
 703     else if (keyName == "Next" && !isAccessibilityEnabled)
 704     {
 705       if(!mIsFocusIndicatorEnabled)
 706       {
 707         // Show focus indicator
 708         mIsFocusIndicatorEnabled = true;
 709       }
 710       else
 711       {
 712         // Move the focus towards the next page
 713         MoveFocus(Toolkit::Control::KeyboardFocus::PAGE_DOWN);
 714       }
 715
 716       isFocusStartableKey = true;
 717     }
 718     else if (keyName == "Tab" && !isAccessibilityEnabled)
 719     {
 720       if(!mIsFocusIndicatorEnabled)
 721       {
 722         // Show focus indicator
 723         mIsFocusIndicatorEnabled = true;
 724       }
 725       else
 726       {
 727         // "Tab" key changes the focus group in the forward direction and
 728         // "Shift-Tab" key changes it in the backward direction.
 729         DoMoveFocusToNextFocusGroup(!event.IsShiftModifier());
 730       }
 731
 732       isFocusStartableKey = true;
 733     }
 734     else if (keyName == "space" && !isAccessibilityEnabled)
 735     {
 736       if(!mIsFocusIndicatorEnabled)
 737       {
 738         // Show focus indicator
 739         mIsFocusIndicatorEnabled = true;
 740       }
 741
 742       isFocusStartableKey = true;
 743     }
 744     else if (keyName == "" && !isAccessibilityEnabled)
 745     {
 746       // Check the fake key event for evas-plugin case
 747       if(!mIsFocusIndicatorEnabled)
 748       {
 749         // Show focus indicator
 750         mIsFocusIndicatorEnabled = true;
 751       }
 752
 753       isFocusStartableKey = true;
 754     }
 755     else if (keyName == "Backspace" && !isAccessibilityEnabled)
 756     {
 757       // Emit signal to go back to the previous view???
 758     }
 759     else if (keyName == "Escape" && !isAccessibilityEnabled)
 760     {
 761     }
 762   }
 763   else if(event.state == KeyEvent::Up)
 764   {
 765     if (keyName == "Return")
 766     {
 767       if(!mIsFocusIndicatorEnabled && !isAccessibilityEnabled)
 768       {
 769         // Show focus indicator
 770         mIsFocusIndicatorEnabled = true;
 771       }
 772       else
 773       {
 774         // The focused actor has enter pressed on it
 775         Actor actor;
 776         if( !isAccessibilityEnabled )
 777         {
 778           actor = GetCurrentFocusActor();
 779         }
 780         else
 781         {
 782           actor = accessibilityManager.GetCurrentFocusActor();
 783         }
 784
 785         if( actor )
 786         {
 787           DoKeyboardEnter( actor );
 788         }
 789       }
 790
 791       isFocusStartableKey = true;
 792     }
 793   }
 794
 795   if(isFocusStartableKey && mIsFocusIndicatorEnabled && !isAccessibilityEnabled)
 796   {
 797     Actor actor = GetCurrentFocusActor();
 798     if( actor )
 799     {
 800       // Make sure the focused actor is highlighted
 801       actor.Add( GetFocusIndicatorActor() );
 802     }
 803     else
 804     {
 805       // No actor is focused but keyboard focus is activated by the key press
 806       // Let's try to move the initial focus
 807       MoveFocus(Toolkit::Control::KeyboardFocus::RIGHT);
 808     }
 809   }
 810 }
 811
 812 void KeyboardFocusManager::OnTouch(const TouchData& touch)
 813 {
 814   // Clear the focus when user touch the screen.
 815   // We only do this on a Down event, otherwise the clear action may override a manually focused actor.
 816   if( ( touch.GetPointCount() < 1 ) || ( touch.GetState( 0 ) == PointState::DOWN ) )
 817   {
 818     ClearFocus();
 819   }
 820 }
 821
 822 Toolkit::KeyboardFocusManager::PreFocusChangeSignalType& KeyboardFocusManager::PreFocusChangeSignal()
 823 {
 824   return mPreFocusChangeSignal;
 825 }
 826
 827 Toolkit::KeyboardFocusManager::FocusChangedSignalType& KeyboardFocusManager::FocusChangedSignal()
 828 {
 829   return mFocusChangedSignal;
 830 }
 831
 832 Toolkit::KeyboardFocusManager::FocusGroupChangedSignalType& KeyboardFocusManager::FocusGroupChangedSignal()
 833 {
 834   return mFocusGroupChangedSignal;
 835 }
 836
 837 Toolkit::KeyboardFocusManager::FocusedActorEnterKeySignalType& KeyboardFocusManager::FocusedActorEnterKeySignal()
 838 {
 839   return mFocusedActorEnterKeySignal;
 840 }
 841
 842 bool KeyboardFocusManager::DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor )
 843 {
 844   Dali::BaseHandle handle( object );
 845
 846   bool connected( true );
 847   KeyboardFocusManager* manager = static_cast< KeyboardFocusManager* >( object ); // TypeRegistry guarantees that this is the correct type.
 848
 849   if( 0 == strcmp( signalName.c_str(), SIGNAL_PRE_FOCUS_CHANGE ) )
 850   {
 851     manager->PreFocusChangeSignal().Connect( tracker, functor );
 852   }
 853   else if( 0 == strcmp( signalName.c_str(), SIGNAL_FOCUS_CHANGED ) )
 854   {
 855     manager->FocusChangedSignal().Connect( tracker, functor );
 856   }
 857   else if( 0 == strcmp( signalName.c_str(), SIGNAL_FOCUS_GROUP_CHANGED ) )
 858   {
 859     manager->FocusGroupChangedSignal().Connect( tracker, functor );
 860   }
 861   else if( 0 == strcmp( signalName.c_str(), SIGNAL_FOCUSED_ACTOR_ENTER_KEY ) )
 862   {
 863     manager->FocusedActorEnterKeySignal().Connect( tracker, functor );
 864   }
 865   else
 866   {
 867     // signalName does not match any signal
 868     connected = false;
 869   }
 870
 871   return connected;
 872 }
 873
 874 void KeyboardFocusManager::SetCustomAlgorithm(CustomAlgorithmInterface& interface)
 875 {
 876   mCustomAlgorithmInterface = &interface;
 877 }
 878
 879 } // namespace Internal
 880
 881 } // namespace Toolkit
 882
 883 } // namespace Dali