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

   1 /*
   2  * Copyright (c) 2016 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/focus-manager/keyinput-focus-manager.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   mIsKeyboardFocusEnabled( false ),
 121   mIsFocusIndicatorEnabled( false ),
 122   mIsWaitingKeyboardFocusChangeCommit( false ),
 123   mFocusHistory(),
 124   mSlotDelegate( this )
 125 {
 126   OnPhysicalKeyboardStatusChanged(PhysicalKeyboard::Get());
 127
 128   Toolkit::KeyInputFocusManager::Get().UnhandledKeyEventSignal().Connect(mSlotDelegate, &KeyboardFocusManager::OnKeyEvent);
 129   Stage::GetCurrent().TouchSignal().Connect( mSlotDelegate, &KeyboardFocusManager::OnTouch );
 130   PhysicalKeyboard::Get().StatusChangedSignal().Connect(mSlotDelegate, &KeyboardFocusManager::OnPhysicalKeyboardStatusChanged);
 131 }
 132
 133 KeyboardFocusManager::~KeyboardFocusManager()
 134 {
 135 }
 136
 137 bool KeyboardFocusManager::SetCurrentFocusActor( Actor actor )
 138 {
 139   DALI_ASSERT_DEBUG( !mIsWaitingKeyboardFocusChangeCommit && "Calling this function in the PreFocusChangeSignal callback?" );
 140
 141   if( actor )
 142   {
 143     return DoSetCurrentFocusActor( actor.GetId() );
 144   }
 145
 146   return false;
 147 }
 148
 149 bool KeyboardFocusManager::DoSetCurrentFocusActor( const unsigned int actorID )
 150 {
 151   Actor rootActor = Stage::GetCurrent().GetRootLayer();
 152   Actor actor = rootActor.FindChildById( actorID );
 153   bool success = false;
 154
 155   // Check whether the actor is in the stage and is keyboard focusable.
 156   if( actor && actor.IsKeyboardFocusable() )
 157   {
 158     mIsFocusIndicatorEnabled = true;
 159     // Draw the focus indicator upon the focused actor when PhysicalKeyboard is attached
 160     if( mIsKeyboardFocusEnabled )
 161     {
 162       actor.Add( GetFocusIndicatorActor() );
 163     }
 164     // Send notification for the change of focus actor
 165     if( !mFocusChangedSignal.Empty() )
 166     {
 167       mFocusChangedSignal.Emit(GetCurrentFocusActor(), actor);
 168     }
 169
 170     DALI_LOG_INFO( gLogFilter, Debug::General, "[%s:%d] Focus Changed\n", __FUNCTION__, __LINE__);
 171
 172     // Save the current focused actor
 173     mCurrentFocusActor = actorID;
 174
 175     // Push Current Focused Actor to FocusHistory
 176     mFocusHistory.PushBack( &actor.GetBaseObject() );
 177
 178     // Delete first element before add new element when Stack is full.
 179     if( mFocusHistory.Count() > MAX_HISTORY_AMOUNT )
 180     {
 181        FocusStackIterator beginPos = mFocusHistory.Begin();
 182        mFocusHistory.Erase( beginPos );
 183     }
 184
 185     DALI_LOG_INFO( gLogFilter, Debug::General, "[%s:%d] SUCCEED\n", __FUNCTION__, __LINE__);
 186     success = true;
 187   }
 188   else
 189   {
 190     DALI_LOG_WARNING("[%s:%d] FAILED\n", __FUNCTION__, __LINE__);
 191   }
 192
 193   return success;
 194 }
 195
 196 Actor KeyboardFocusManager::GetCurrentFocusActor()
 197 {
 198   Actor rootActor = Stage::GetCurrent().GetRootLayer();
 199   return rootActor.FindChildById(mCurrentFocusActor);
 200 }
 201
 202 Actor KeyboardFocusManager::GetCurrentFocusGroup()
 203 {
 204   return GetFocusGroup(GetCurrentFocusActor());
 205 }
 206
 207 void KeyboardFocusManager::MoveFocusBackward()
 208 {
 209   // Find Pre Focused Actor when the list size is more than 1
 210   if( mFocusHistory.Count() > 1 )
 211   {
 212     // Delete current focused actor in history
 213     FocusStackIterator endPos = mFocusHistory.End();
 214     endPos = mFocusHistory.Erase( --endPos );
 215
 216     // If pre-focused actors are not on stage, remove them in stack
 217     while( !Dali::Actor::DownCast(BaseHandle(mFocusHistory[ mFocusHistory.Count() - 1 ])).OnStage() )
 218     {
 219       endPos = mFocusHistory.Erase( --endPos );
 220     }
 221
 222     // Get pre focused actor
 223     BaseObject* object = mFocusHistory[ mFocusHistory.Count() - 1 ];
 224     BaseHandle handle( object );
 225     Actor preFocusedActor = Dali::Actor::DownCast( handle );
 226
 227     // Delete pre focused actor in history because it will pushed again by SetCurrentFocusActor()
 228     mFocusHistory.Erase( --endPos );
 229
 230     SetCurrentFocusActor( preFocusedActor );
 231  }
 232 }
 233
 234 bool KeyboardFocusManager::IsLayoutControl(Actor actor) const
 235 {
 236   Toolkit::Control control = Toolkit::Control::DownCast(actor);
 237   return control && GetImplementation( control ).IsKeyboardNavigationSupported();
 238 }
 239
 240 Toolkit::Control KeyboardFocusManager::GetParentLayoutControl(Actor actor) const
 241 {
 242   // Get the actor's parent layout control that supports two dimensional keyboard navigation
 243   Actor rootActor = Stage::GetCurrent().GetRootLayer();
 244   Actor parent;
 245   if(actor)
 246   {
 247     parent = actor.GetParent();
 248   }
 249
 250   while( parent && !IsLayoutControl(parent) && parent != rootActor )
 251   {
 252     parent = parent.GetParent();
 253   }
 254
 255   return Toolkit::Control::DownCast(parent);
 256 }
 257
 258 bool KeyboardFocusManager::MoveFocus(Toolkit::Control::KeyboardFocus::Direction direction)
 259 {
 260   Actor currentFocusActor = GetCurrentFocusActor();
 261
 262   bool succeed = false;
 263
 264   // Go through the actor's hierarchy until we find a layout control that knows how to move the focus
 265   Toolkit::Control parentLayoutControl = GetParentLayoutControl(currentFocusActor);
 266   while(parentLayoutControl && !succeed)
 267   {
 268     succeed = DoMoveFocusWithinLayoutControl(parentLayoutControl, currentFocusActor, direction);
 269     parentLayoutControl = GetParentLayoutControl(parentLayoutControl);
 270   }
 271
 272   if(!succeed && !mPreFocusChangeSignal.Empty())
 273   {
 274     // Don't know how to move the focus further. The application needs to tell us which actor to move the focus to
 275     mIsWaitingKeyboardFocusChangeCommit = true;
 276     Actor nextFocusableActor = mPreFocusChangeSignal.Emit(currentFocusActor, Actor(), direction);
 277     mIsWaitingKeyboardFocusChangeCommit = false;
 278
 279     if ( nextFocusableActor && nextFocusableActor.IsKeyboardFocusable() )
 280     {
 281       // Whether the next focusable actor is a layout control
 282       if(IsLayoutControl(nextFocusableActor))
 283       {
 284         // If so, move the focus inside it.
 285         Toolkit::Control layoutControl = Toolkit::Control::DownCast(nextFocusableActor);
 286         succeed = DoMoveFocusWithinLayoutControl(layoutControl, currentFocusActor, direction);
 287       }
 288       else
 289       {
 290         // Otherwise, just set focus to the next focusable actor
 291         succeed = SetCurrentFocusActor(nextFocusableActor);
 292       }
 293     }
 294   }
 295
 296   return succeed;
 297 }
 298
 299 bool KeyboardFocusManager::DoMoveFocusWithinLayoutControl(Toolkit::Control control, Actor actor, Toolkit::Control::KeyboardFocus::Direction direction)
 300 {
 301   // Ask the control for the next actor to focus
 302   Actor nextFocusableActor = GetImplementation( control ).GetNextKeyboardFocusableActor(actor, direction, mFocusGroupLoopEnabled);
 303   if(nextFocusableActor)
 304   {
 305     if(!nextFocusableActor.IsKeyboardFocusable())
 306     {
 307       // If the actor is not focusable, ask the same layout control for the next actor to focus
 308       return DoMoveFocusWithinLayoutControl(control, nextFocusableActor, direction);
 309     }
 310     else
 311     {
 312       Actor currentFocusActor = GetCurrentFocusActor();
 313       Actor committedFocusActor = nextFocusableActor;
 314
 315       // We will try to move the focus to the actor. Emit a signal to notify the proposed actor to focus
 316       // Signal handler can check the proposed actor and return a different actor if it wishes.
 317       if( !mPreFocusChangeSignal.Empty() )
 318       {
 319         mIsWaitingKeyboardFocusChangeCommit = true;
 320         committedFocusActor = mPreFocusChangeSignal.Emit(currentFocusActor, nextFocusableActor, direction);
 321         mIsWaitingKeyboardFocusChangeCommit = false;
 322       }
 323
 324       if (committedFocusActor && committedFocusActor.IsKeyboardFocusable())
 325       {
 326         // Whether the commited focusable actor is a layout control
 327         if(IsLayoutControl(committedFocusActor))
 328         {
 329           // If so, move the focus inside it.
 330           Toolkit::Control layoutControl = Toolkit::Control::DownCast(committedFocusActor);
 331           return DoMoveFocusWithinLayoutControl(layoutControl, currentFocusActor, direction);
 332         }
 333         else
 334         {
 335           // Otherwise, just set focus to the next focusable actor
 336           if(committedFocusActor == nextFocusableActor)
 337           {
 338             // If the application hasn't changed our proposed actor, we informs the layout control we will
 339             // move the focus to what the control returns. The control might wish to perform some actions
 340             // before the focus is actually moved.
 341             GetImplementation( control ).OnKeyboardFocusChangeCommitted( committedFocusActor );
 342           }
 343
 344           return SetCurrentFocusActor(committedFocusActor);
 345         }
 346       }
 347       else
 348       {
 349         return false;
 350       }
 351     }
 352   }
 353   else
 354   {
 355     // No more actor can be focused in the given direction within the same layout control.
 356     return false;
 357   }
 358 }
 359
 360 bool KeyboardFocusManager::DoMoveFocusToNextFocusGroup(bool forward)
 361 {
 362   bool succeed = false;
 363
 364   // Get the parent layout control of the current focus group
 365   Toolkit::Control parentLayoutControl = GetParentLayoutControl(GetCurrentFocusGroup());
 366
 367   while(parentLayoutControl && !succeed)
 368   {
 369     // If the current focus group has a parent layout control, we can probably automatically
 370     // move the focus to the next focus group in the forward or backward direction.
 371     Toolkit::Control::KeyboardFocus::Direction direction = forward ? Toolkit::Control::KeyboardFocus::RIGHT : Toolkit::Control::KeyboardFocus::LEFT;
 372     succeed = DoMoveFocusWithinLayoutControl(parentLayoutControl, GetCurrentFocusActor(), direction);
 373     parentLayoutControl = GetParentLayoutControl(parentLayoutControl);
 374   }
 375
 376   if(!mFocusGroupChangedSignal.Empty())
 377   {
 378     // Emit a focus group changed signal. The applicaton can move the focus to a new focus group
 379     mFocusGroupChangedSignal.Emit(GetCurrentFocusActor(), forward);
 380   }
 381
 382   return succeed;
 383 }
 384
 385 void KeyboardFocusManager::DoKeyboardEnter(Actor actor)
 386 {
 387   if( actor )
 388   {
 389     Toolkit::Control control = Toolkit::Control::DownCast( actor );
 390     if( control )
 391     {
 392       // Notify the control that enter has been pressed on it.
 393       GetImplementation( control ).KeyboardEnter();
 394     }
 395
 396     // Send a notification for the actor.
 397     if( !mFocusedActorEnterKeySignal.Empty() )
 398     {
 399       mFocusedActorEnterKeySignal.Emit( actor );
 400     }
 401   }
 402 }
 403
 404 void KeyboardFocusManager::ClearFocus()
 405 {
 406   Actor actor = GetCurrentFocusActor();
 407   if(actor)
 408   {
 409     if(mFocusIndicatorActor)
 410     {
 411       actor.Remove(mFocusIndicatorActor);
 412     }
 413
 414     // Send notification for the change of focus actor
 415     if( !mFocusChangedSignal.Empty() )
 416     {
 417       mFocusChangedSignal.Emit(actor, Actor());
 418     }
 419   }
 420
 421   mCurrentFocusActor = 0;
 422   mIsFocusIndicatorEnabled = false;
 423 }
 424
 425 void KeyboardFocusManager::SetFocusGroupLoop(bool enabled)
 426 {
 427   mFocusGroupLoopEnabled = enabled;
 428 }
 429
 430 bool KeyboardFocusManager::GetFocusGroupLoop() const
 431 {
 432   return mFocusGroupLoopEnabled;
 433 }
 434
 435 void KeyboardFocusManager::SetAsFocusGroup(Actor actor, bool isFocusGroup)
 436 {
 437   if(actor)
 438   {
 439     // Create/Set focus group property.
 440     actor.RegisterProperty( IS_FOCUS_GROUP_PROPERTY_NAME, isFocusGroup, Property::READ_WRITE );
 441   }
 442 }
 443
 444 bool KeyboardFocusManager::IsFocusGroup(Actor actor) const
 445 {
 446   // Check whether the actor is a focus group
 447   bool isFocusGroup = false;
 448
 449   if(actor)
 450   {
 451     Property::Index propertyIsFocusGroup = actor.GetPropertyIndex(IS_FOCUS_GROUP_PROPERTY_NAME);
 452     if(propertyIsFocusGroup != Property::INVALID_INDEX)
 453     {
 454       isFocusGroup = actor.GetProperty<bool>(propertyIsFocusGroup);
 455     }
 456   }
 457
 458   return isFocusGroup;
 459 }
 460
 461 Actor KeyboardFocusManager::GetFocusGroup(Actor actor)
 462 {
 463   // Go through the actor's hierarchy to check which focus group the actor belongs to
 464   while (actor && !IsFocusGroup(actor))
 465   {
 466     actor = actor.GetParent();
 467   }
 468
 469   return actor;
 470 }
 471
 472 void KeyboardFocusManager::SetFocusIndicatorActor(Actor indicator)
 473 {
 474   if(mFocusIndicatorActor != indicator)
 475   {
 476     Actor currentFocusActor = GetCurrentFocusActor();
 477     if(currentFocusActor)
 478     {
 479       // The new focus indicator should be added to the current focused actor immediately
 480       if(mFocusIndicatorActor)
 481       {
 482         currentFocusActor.Remove(mFocusIndicatorActor);
 483       }
 484
 485       if(indicator)
 486       {
 487         currentFocusActor.Add(indicator);
 488       }
 489     }
 490
 491     mFocusIndicatorActor = indicator;
 492   }
 493 }
 494
 495 Actor KeyboardFocusManager::GetFocusIndicatorActor()
 496 {
 497   if( ! mFocusIndicatorActor )
 498   {
 499     // Create the default if it hasn't been set and one that's shared by all the keyboard focusable actors
 500     mFocusIndicatorActor = Toolkit::ImageView::New( FOCUS_BORDER_IMAGE_PATH );
 501     mFocusIndicatorActor.SetParentOrigin( ParentOrigin::CENTER );
 502
 503     // Apply size constraint to the focus indicator
 504     mFocusIndicatorActor.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
 505   }
 506
 507   return mFocusIndicatorActor;
 508 }
 509
 510 void KeyboardFocusManager::OnPhysicalKeyboardStatusChanged(PhysicalKeyboard keyboard)
 511 {
 512   mIsKeyboardFocusEnabled = keyboard.IsAttached();
 513
 514   if(mIsKeyboardFocusEnabled)
 515   {
 516     // Show indicator when keyboard focus turned on if there is focused actor.
 517     Actor actor = GetCurrentFocusActor();
 518     if(actor)
 519     {
 520       actor.Add( GetFocusIndicatorActor() );
 521     }
 522     mIsFocusIndicatorEnabled = true;
 523   }
 524   else
 525   {
 526     // Hide indicator when keyboard focus turned off
 527     Actor actor = GetCurrentFocusActor();
 528     if( actor && mFocusIndicatorActor )
 529     {
 530       actor.Remove( mFocusIndicatorActor );
 531     }
 532     mIsFocusIndicatorEnabled = false;
 533   }
 534 }
 535
 536 void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
 537 {
 538   if(!mIsKeyboardFocusEnabled)
 539   {
 540     return;
 541   }
 542
 543   AccessibilityAdaptor accessibilityAdaptor = AccessibilityAdaptor::Get();
 544   bool isAccessibilityEnabled = accessibilityAdaptor.IsEnabled();
 545
 546   Toolkit::AccessibilityManager accessibilityManager = Toolkit::AccessibilityManager::Get();
 547
 548   std::string keyName = event.keyPressedName;
 549
 550   bool isFocusStartableKey = false;
 551
 552   if(event.state == KeyEvent::Down)
 553   {
 554     if (keyName == "Left")
 555     {
 556       if(!isAccessibilityEnabled)
 557       {
 558         if(!mIsFocusIndicatorEnabled)
 559         {
 560           // Show focus indicator
 561           mIsFocusIndicatorEnabled = true;
 562         }
 563         else
 564         {
 565           // Move the focus towards left
 566           MoveFocus(Toolkit::Control::KeyboardFocus::LEFT);
 567         }
 568
 569         isFocusStartableKey = true;
 570       }
 571       else
 572       {
 573         // Move the accessibility focus backward
 574         accessibilityManager.MoveFocusBackward();
 575       }
 576     }
 577     else if (keyName == "Right")
 578     {
 579       if(!isAccessibilityEnabled)
 580       {
 581         if(!mIsFocusIndicatorEnabled)
 582         {
 583           // Show focus indicator
 584           mIsFocusIndicatorEnabled = true;
 585         }
 586         else
 587         {
 588           // Move the focus towards right
 589           MoveFocus(Toolkit::Control::KeyboardFocus::RIGHT);
 590         }
 591       }
 592       else
 593       {
 594         // Move the accessibility focus forward
 595         accessibilityManager.MoveFocusForward();
 596       }
 597
 598       isFocusStartableKey = true;
 599     }
 600     else if (keyName == "Up" && !isAccessibilityEnabled)
 601     {
 602       if(!mIsFocusIndicatorEnabled)
 603       {
 604         // Show focus indicator
 605         mIsFocusIndicatorEnabled = true;
 606       }
 607       else
 608       {
 609         // Move the focus towards up
 610         MoveFocus(Toolkit::Control::KeyboardFocus::UP);
 611       }
 612
 613       isFocusStartableKey = true;
 614     }
 615     else if (keyName == "Down" && !isAccessibilityEnabled)
 616     {
 617       if(!mIsFocusIndicatorEnabled)
 618       {
 619         // Show focus indicator
 620         mIsFocusIndicatorEnabled = true;
 621       }
 622       else
 623       {
 624         // Move the focus towards down
 625         MoveFocus(Toolkit::Control::KeyboardFocus::DOWN);
 626       }
 627
 628       isFocusStartableKey = true;
 629     }
 630     else if (keyName == "Prior" && !isAccessibilityEnabled)
 631     {
 632       if(!mIsFocusIndicatorEnabled)
 633       {
 634         // Show focus indicator
 635         mIsFocusIndicatorEnabled = true;
 636       }
 637       else
 638       {
 639         // Move the focus towards the previous page
 640         MoveFocus(Toolkit::Control::KeyboardFocus::PAGE_UP);
 641       }
 642
 643       isFocusStartableKey = true;
 644     }
 645     else if (keyName == "Next" && !isAccessibilityEnabled)
 646     {
 647       if(!mIsFocusIndicatorEnabled)
 648       {
 649         // Show focus indicator
 650         mIsFocusIndicatorEnabled = true;
 651       }
 652       else
 653       {
 654         // Move the focus towards the next page
 655         MoveFocus(Toolkit::Control::KeyboardFocus::PAGE_DOWN);
 656       }
 657
 658       isFocusStartableKey = true;
 659     }
 660     else if (keyName == "Tab" && !isAccessibilityEnabled)
 661     {
 662       if(!mIsFocusIndicatorEnabled)
 663       {
 664         // Show focus indicator
 665         mIsFocusIndicatorEnabled = true;
 666       }
 667       else
 668       {
 669         // "Tab" key changes the focus group in the forward direction and
 670         // "Shift-Tab" key changes it in the backward direction.
 671         DoMoveFocusToNextFocusGroup(!event.IsShiftModifier());
 672       }
 673
 674       isFocusStartableKey = true;
 675     }
 676     else if (keyName == "space" && !isAccessibilityEnabled)
 677     {
 678       if(!mIsFocusIndicatorEnabled)
 679       {
 680         // Show focus indicator
 681         mIsFocusIndicatorEnabled = true;
 682       }
 683
 684       isFocusStartableKey = true;
 685     }
 686     else if (keyName == "" && !isAccessibilityEnabled)
 687     {
 688       // Check the fake key event for evas-plugin case
 689       if(!mIsFocusIndicatorEnabled)
 690       {
 691         // Show focus indicator
 692         mIsFocusIndicatorEnabled = true;
 693       }
 694
 695       isFocusStartableKey = true;
 696     }
 697     else if (keyName == "Backspace" && !isAccessibilityEnabled)
 698     {
 699       // Emit signal to go back to the previous view???
 700     }
 701     else if (keyName == "Escape" && !isAccessibilityEnabled)
 702     {
 703     }
 704   }
 705   else if(event.state == KeyEvent::Up)
 706   {
 707     if (keyName == "Return")
 708     {
 709       if(!mIsFocusIndicatorEnabled && !isAccessibilityEnabled)
 710       {
 711         // Show focus indicator
 712         mIsFocusIndicatorEnabled = true;
 713       }
 714       else
 715       {
 716         // The focused actor has enter pressed on it
 717         Actor actor;
 718         if( !isAccessibilityEnabled )
 719         {
 720           actor = GetCurrentFocusActor();
 721         }
 722         else
 723         {
 724           actor = accessibilityManager.GetCurrentFocusActor();
 725         }
 726
 727         if( actor )
 728         {
 729           DoKeyboardEnter( actor );
 730         }
 731       }
 732
 733       isFocusStartableKey = true;
 734     }
 735   }
 736
 737   if(isFocusStartableKey && mIsFocusIndicatorEnabled && !isAccessibilityEnabled)
 738   {
 739     Actor actor = GetCurrentFocusActor();
 740     if( actor )
 741     {
 742       // Make sure the focused actor is highlighted
 743       actor.Add( GetFocusIndicatorActor() );
 744     }
 745     else
 746     {
 747       // No actor is focused but keyboard focus is activated by the key press
 748       // Let's try to move the initial focus
 749       MoveFocus(Toolkit::Control::KeyboardFocus::RIGHT);
 750     }
 751   }
 752 }
 753
 754 void KeyboardFocusManager::OnTouch(const TouchData& touch)
 755 {
 756   // Clear the focus when user touch the screen.
 757   // We only do this on a Down event, otherwise the clear action may override a manually focused actor.
 758   if( ( touch.GetPointCount() < 1 ) || ( touch.GetState( 0 ) == PointState::DOWN ) )
 759   {
 760     ClearFocus();
 761   }
 762 }
 763
 764 Toolkit::KeyboardFocusManager::PreFocusChangeSignalType& KeyboardFocusManager::PreFocusChangeSignal()
 765 {
 766   return mPreFocusChangeSignal;
 767 }
 768
 769 Toolkit::KeyboardFocusManager::FocusChangedSignalType& KeyboardFocusManager::FocusChangedSignal()
 770 {
 771   return mFocusChangedSignal;
 772 }
 773
 774 Toolkit::KeyboardFocusManager::FocusGroupChangedSignalType& KeyboardFocusManager::FocusGroupChangedSignal()
 775 {
 776   return mFocusGroupChangedSignal;
 777 }
 778
 779 Toolkit::KeyboardFocusManager::FocusedActorEnterKeySignalType& KeyboardFocusManager::FocusedActorEnterKeySignal()
 780 {
 781   return mFocusedActorEnterKeySignal;
 782 }
 783
 784 bool KeyboardFocusManager::DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor )
 785 {
 786   Dali::BaseHandle handle( object );
 787
 788   bool connected( true );
 789   KeyboardFocusManager* manager = static_cast< KeyboardFocusManager* >( object ); // TypeRegistry guarantees that this is the correct type.
 790
 791   if( 0 == strcmp( signalName.c_str(), SIGNAL_PRE_FOCUS_CHANGE ) )
 792   {
 793     manager->PreFocusChangeSignal().Connect( tracker, functor );
 794   }
 795   else if( 0 == strcmp( signalName.c_str(), SIGNAL_FOCUS_CHANGED ) )
 796   {
 797     manager->FocusChangedSignal().Connect( tracker, functor );
 798   }
 799   else if( 0 == strcmp( signalName.c_str(), SIGNAL_FOCUS_GROUP_CHANGED ) )
 800   {
 801     manager->FocusGroupChangedSignal().Connect( tracker, functor );
 802   }
 803   else if( 0 == strcmp( signalName.c_str(), SIGNAL_FOCUSED_ACTOR_ENTER_KEY ) )
 804   {
 805     manager->FocusedActorEnterKeySignal().Connect( tracker, functor );
 806   }
 807   else
 808   {
 809     // signalName does not match any signal
 810     connected = false;
 811   }
 812
 813   return connected;
 814 }
 815
 816 } // namespace Internal
 817
 818 } // namespace Toolkit
 819
 820 } // namespace Dali