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 #include <dali-toolkit/devel-api/controls/control-devel.h>
  42
  43 namespace Dali
  44 {
  45
  46 namespace Toolkit
  47 {
  48
  49 namespace Internal
  50 {
  51
  52 namespace // Unnamed namespace
  53 {
  54
  55 #if defined(DEBUG_ENABLED)
  56 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_KEYBOARD_FOCUS_MANAGER");
  57 #endif
  58
  59 const char* const IS_FOCUS_GROUP_PROPERTY_NAME = "isKeyboardFocusGroup"; // This property will be replaced by a flag in Control.
  60
  61 const char* const FOCUS_BORDER_IMAGE_PATH = DALI_IMAGE_DIR "keyboard_focus.9.png";
  62
  63 BaseHandle Create()
  64 {
  65   BaseHandle handle = KeyboardFocusManager::Get();
  66
  67   if ( !handle )
  68   {
  69     SingletonService singletonService( SingletonService::Get() );
  70     if ( singletonService )
  71     {
  72       Toolkit::KeyboardFocusManager manager = Toolkit::KeyboardFocusManager( new Internal::KeyboardFocusManager() );
  73       singletonService.Register( typeid( manager ), manager );
  74       handle = manager;
  75     }
  76   }
  77
  78   return handle;
  79 }
  80
  81 DALI_TYPE_REGISTRATION_BEGIN_CREATE( Toolkit::KeyboardFocusManager, Dali::BaseHandle, Create, true )
  82
  83 DALI_SIGNAL_REGISTRATION( Toolkit, KeyboardFocusManager, "keyboardPreFocusChange",           SIGNAL_PRE_FOCUS_CHANGE )
  84 DALI_SIGNAL_REGISTRATION( Toolkit, KeyboardFocusManager, "keyboardFocusChanged",             SIGNAL_FOCUS_CHANGED )
  85 DALI_SIGNAL_REGISTRATION( Toolkit, KeyboardFocusManager, "keyboardFocusGroupChanged",        SIGNAL_FOCUS_GROUP_CHANGED )
  86 DALI_SIGNAL_REGISTRATION( Toolkit, KeyboardFocusManager, "keyboardFocusedActorEnterKey",     SIGNAL_FOCUSED_ACTOR_ENTER_KEY )
  87
  88 DALI_TYPE_REGISTRATION_END()
  89
  90 const unsigned int MAX_HISTORY_AMOUNT = 30; ///< Max length of focus history stack
  91
  92 } // unnamed namespace
  93
  94 Toolkit::KeyboardFocusManager KeyboardFocusManager::Get()
  95 {
  96   Toolkit::KeyboardFocusManager manager;
  97
  98   SingletonService singletonService( SingletonService::Get() );
  99   if ( singletonService )
 100   {
 101     // Check whether the keyboard focus manager is already created
 102     Dali::BaseHandle handle = singletonService.GetSingleton( typeid( Toolkit::KeyboardFocusManager ) );
 103     if(handle)
 104     {
 105       // If so, downcast the handle of singleton to keyboard focus manager
 106       manager = Toolkit::KeyboardFocusManager( dynamic_cast< KeyboardFocusManager* >( handle.GetObjectPtr() ) );
 107     }
 108   }
 109
 110   return manager;
 111 }
 112
 113 KeyboardFocusManager::KeyboardFocusManager()
 114 : mPreFocusChangeSignal(),
 115   mFocusChangedSignal(),
 116   mFocusGroupChangedSignal(),
 117   mFocusedActorEnterKeySignal(),
 118   mCurrentFocusActor( 0 ),
 119   mFocusIndicatorActor(),
 120   mFocusGroupLoopEnabled( false ),
 121   mIsFocusIndicatorEnabled( false ),
 122   mIsWaitingKeyboardFocusChangeCommit( false ),
 123   mFocusHistory(),
 124   mSlotDelegate( this )
 125 {
 126   // TODO: Get FocusIndicatorEnable constant from stylesheet to set mIsFocusIndicatorEnabled.
 127   Toolkit::KeyInputFocusManager::Get().UnhandledKeyEventSignal().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 && !mPreFocusChangeSignal.Empty())
 279   {
 280     // Don't know how to move the focus further. The application needs to tell us which actor to move the focus to
 281     mIsWaitingKeyboardFocusChangeCommit = true;
 282     Actor nextFocusableActor = mPreFocusChangeSignal.Emit(currentFocusActor, Actor(), direction);
 283     mIsWaitingKeyboardFocusChangeCommit = false;
 284
 285     if ( nextFocusableActor && nextFocusableActor.IsKeyboardFocusable() )
 286     {
 287       // Whether the next focusable actor is a layout control
 288       if(IsLayoutControl(nextFocusableActor))
 289       {
 290         // If so, move the focus inside it.
 291         Toolkit::Control layoutControl = Toolkit::Control::DownCast(nextFocusableActor);
 292         succeed = DoMoveFocusWithinLayoutControl(layoutControl, currentFocusActor, direction);
 293       }
 294       else
 295       {
 296         // Otherwise, just set focus to the next focusable actor
 297         succeed = SetCurrentFocusActor(nextFocusableActor);
 298       }
 299     }
 300   }
 301
 302   return succeed;
 303 }
 304
 305 bool KeyboardFocusManager::DoMoveFocusWithinLayoutControl(Toolkit::Control control, Actor actor, Toolkit::Control::KeyboardFocus::Direction direction)
 306 {
 307   // Ask the control for the next actor to focus
 308   Actor nextFocusableActor = GetImplementation( control ).GetNextKeyboardFocusableActor(actor, direction, mFocusGroupLoopEnabled);
 309   if(nextFocusableActor)
 310   {
 311     if(!nextFocusableActor.IsKeyboardFocusable())
 312     {
 313       // If the actor is not focusable, ask the same layout control for the next actor to focus
 314       return DoMoveFocusWithinLayoutControl(control, nextFocusableActor, direction);
 315     }
 316     else
 317     {
 318       Actor currentFocusActor = GetCurrentFocusActor();
 319       Actor committedFocusActor = nextFocusableActor;
 320
 321       // We will try to move the focus to the actor. Emit a signal to notify the proposed actor to focus
 322       // Signal handler can check the proposed actor and return a different actor if it wishes.
 323       if( !mPreFocusChangeSignal.Empty() )
 324       {
 325         mIsWaitingKeyboardFocusChangeCommit = true;
 326         committedFocusActor = mPreFocusChangeSignal.Emit(currentFocusActor, nextFocusableActor, direction);
 327         mIsWaitingKeyboardFocusChangeCommit = false;
 328       }
 329
 330       if (committedFocusActor && committedFocusActor.IsKeyboardFocusable())
 331       {
 332         // Whether the commited focusable actor is a layout control
 333         if(IsLayoutControl(committedFocusActor))
 334         {
 335           // If so, move the focus inside it.
 336           Toolkit::Control layoutControl = Toolkit::Control::DownCast(committedFocusActor);
 337           return DoMoveFocusWithinLayoutControl(layoutControl, currentFocusActor, direction);
 338         }
 339         else
 340         {
 341           // Otherwise, just set focus to the next focusable actor
 342           if(committedFocusActor == nextFocusableActor)
 343           {
 344             // If the application hasn't changed our proposed actor, we informs the layout control we will
 345             // move the focus to what the control returns. The control might wish to perform some actions
 346             // before the focus is actually moved.
 347             GetImplementation( control ).OnKeyboardFocusChangeCommitted( committedFocusActor );
 348           }
 349
 350           return SetCurrentFocusActor(committedFocusActor);
 351         }
 352       }
 353       else
 354       {
 355         return false;
 356       }
 357     }
 358   }
 359   else
 360   {
 361     // No more actor can be focused in the given direction within the same layout control.
 362     return false;
 363   }
 364 }
 365
 366 bool KeyboardFocusManager::DoMoveFocusToNextFocusGroup(bool forward)
 367 {
 368   bool succeed = false;
 369
 370   // Get the parent layout control of the current focus group
 371   Toolkit::Control parentLayoutControl = GetParentLayoutControl(GetCurrentFocusGroup());
 372
 373   while(parentLayoutControl && !succeed)
 374   {
 375     // If the current focus group has a parent layout control, we can probably automatically
 376     // move the focus to the next focus group in the forward or backward direction.
 377     Toolkit::Control::KeyboardFocus::Direction direction = forward ? Toolkit::Control::KeyboardFocus::RIGHT : Toolkit::Control::KeyboardFocus::LEFT;
 378     succeed = DoMoveFocusWithinLayoutControl(parentLayoutControl, GetCurrentFocusActor(), direction);
 379     parentLayoutControl = GetParentLayoutControl(parentLayoutControl);
 380   }
 381
 382   if(!mFocusGroupChangedSignal.Empty())
 383   {
 384     // Emit a focus group changed signal. The applicaton can move the focus to a new focus group
 385     mFocusGroupChangedSignal.Emit(GetCurrentFocusActor(), forward);
 386   }
 387
 388   return succeed;
 389 }
 390
 391 void KeyboardFocusManager::DoKeyboardEnter(Actor actor)
 392 {
 393   if( actor )
 394   {
 395     Toolkit::Control control = Toolkit::Control::DownCast( actor );
 396     if( control )
 397     {
 398       // Notify the control that enter has been pressed on it.
 399       GetImplementation( control ).KeyboardEnter();
 400     }
 401
 402     // Send a notification for the actor.
 403     if( !mFocusedActorEnterKeySignal.Empty() )
 404     {
 405       mFocusedActorEnterKeySignal.Emit( actor );
 406     }
 407   }
 408 }
 409
 410 void KeyboardFocusManager::ClearFocus()
 411 {
 412   Actor actor = GetCurrentFocusActor();
 413   if( actor )
 414   {
 415     if( mFocusIndicatorActor )
 416     {
 417       actor.Remove( mFocusIndicatorActor );
 418     }
 419
 420     // Send notification for the change of focus actor
 421     if( !mFocusChangedSignal.Empty() )
 422     {
 423       mFocusChangedSignal.Emit( actor, Actor() );
 424     }
 425
 426     Toolkit::Control currentlyFocusedControl = Toolkit::Control::DownCast( actor );
 427     if( currentlyFocusedControl )
 428     {
 429       currentlyFocusedControl.SetProperty( DevelControl::Property::STATE, DevelControl::NORMAL );
 430       currentlyFocusedControl.ClearKeyInputFocus();
 431     }
 432   }
 433
 434   mCurrentFocusActor = 0;
 435   mIsFocusIndicatorEnabled = false;
 436 }
 437
 438 void KeyboardFocusManager::SetFocusGroupLoop(bool enabled)
 439 {
 440   mFocusGroupLoopEnabled = enabled;
 441 }
 442
 443 bool KeyboardFocusManager::GetFocusGroupLoop() const
 444 {
 445   return mFocusGroupLoopEnabled;
 446 }
 447
 448 void KeyboardFocusManager::SetAsFocusGroup(Actor actor, bool isFocusGroup)
 449 {
 450   if(actor)
 451   {
 452     // Create/Set focus group property.
 453     actor.RegisterProperty( IS_FOCUS_GROUP_PROPERTY_NAME, isFocusGroup, Property::READ_WRITE );
 454   }
 455 }
 456
 457 bool KeyboardFocusManager::IsFocusGroup(Actor actor) const
 458 {
 459   // Check whether the actor is a focus group
 460   bool isFocusGroup = false;
 461
 462   if(actor)
 463   {
 464     Property::Index propertyIsFocusGroup = actor.GetPropertyIndex(IS_FOCUS_GROUP_PROPERTY_NAME);
 465     if(propertyIsFocusGroup != Property::INVALID_INDEX)
 466     {
 467       isFocusGroup = actor.GetProperty<bool>(propertyIsFocusGroup);
 468     }
 469   }
 470
 471   return isFocusGroup;
 472 }
 473
 474 Actor KeyboardFocusManager::GetFocusGroup(Actor actor)
 475 {
 476   // Go through the actor's hierarchy to check which focus group the actor belongs to
 477   while (actor && !IsFocusGroup(actor))
 478   {
 479     actor = actor.GetParent();
 480   }
 481
 482   return actor;
 483 }
 484
 485 void KeyboardFocusManager::SetFocusIndicatorActor(Actor indicator)
 486 {
 487   if(mFocusIndicatorActor != indicator)
 488   {
 489     Actor currentFocusActor = GetCurrentFocusActor();
 490     if(currentFocusActor)
 491     {
 492       // The new focus indicator should be added to the current focused actor immediately
 493       if(mFocusIndicatorActor)
 494       {
 495         currentFocusActor.Remove(mFocusIndicatorActor);
 496       }
 497
 498       if(indicator)
 499       {
 500         currentFocusActor.Add(indicator);
 501       }
 502     }
 503
 504     mFocusIndicatorActor = indicator;
 505   }
 506 }
 507
 508 Actor KeyboardFocusManager::GetFocusIndicatorActor()
 509 {
 510   if( ! mFocusIndicatorActor )
 511   {
 512     // Create the default if it hasn't been set and one that's shared by all the keyboard focusable actors
 513     mFocusIndicatorActor = Toolkit::ImageView::New( FOCUS_BORDER_IMAGE_PATH );
 514
 515     // Apply size constraint to the focus indicator
 516     mFocusIndicatorActor.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
 517   }
 518
 519   mFocusIndicatorActor.SetParentOrigin( ParentOrigin::CENTER );
 520   mFocusIndicatorActor.SetAnchorPoint( AnchorPoint::CENTER );
 521   mFocusIndicatorActor.SetPosition(0.0f, 0.0f);
 522
 523   return mFocusIndicatorActor;
 524 }
 525
 526 void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
 527 {
 528   AccessibilityAdaptor accessibilityAdaptor = AccessibilityAdaptor::Get();
 529   bool isAccessibilityEnabled = accessibilityAdaptor.IsEnabled();
 530
 531   Toolkit::AccessibilityManager accessibilityManager = Toolkit::AccessibilityManager::Get();
 532
 533   std::string keyName = event.keyPressedName;
 534
 535   bool isFocusStartableKey = false;
 536
 537   if(event.state == KeyEvent::Down)
 538   {
 539     if (keyName == "Left")
 540     {
 541       if(!isAccessibilityEnabled)
 542       {
 543         if(!mIsFocusIndicatorEnabled)
 544         {
 545           // Show focus indicator
 546           mIsFocusIndicatorEnabled = true;
 547         }
 548         else
 549         {
 550           // Move the focus towards left
 551           MoveFocus(Toolkit::Control::KeyboardFocus::LEFT);
 552         }
 553
 554         isFocusStartableKey = true;
 555       }
 556       else
 557       {
 558         // Move the accessibility focus backward
 559         accessibilityManager.MoveFocusBackward();
 560       }
 561     }
 562     else if (keyName == "Right")
 563     {
 564       if(!isAccessibilityEnabled)
 565       {
 566         if(!mIsFocusIndicatorEnabled)
 567         {
 568           // Show focus indicator
 569           mIsFocusIndicatorEnabled = true;
 570         }
 571         else
 572         {
 573           // Move the focus towards right
 574           MoveFocus(Toolkit::Control::KeyboardFocus::RIGHT);
 575         }
 576       }
 577       else
 578       {
 579         // Move the accessibility focus forward
 580         accessibilityManager.MoveFocusForward();
 581       }
 582
 583       isFocusStartableKey = true;
 584     }
 585     else if (keyName == "Up" && !isAccessibilityEnabled)
 586     {
 587       if(!mIsFocusIndicatorEnabled)
 588       {
 589         // Show focus indicator
 590         mIsFocusIndicatorEnabled = true;
 591       }
 592       else
 593       {
 594         // Move the focus towards up
 595         MoveFocus(Toolkit::Control::KeyboardFocus::UP);
 596       }
 597
 598       isFocusStartableKey = true;
 599     }
 600     else if (keyName == "Down" && !isAccessibilityEnabled)
 601     {
 602       if(!mIsFocusIndicatorEnabled)
 603       {
 604         // Show focus indicator
 605         mIsFocusIndicatorEnabled = true;
 606       }
 607       else
 608       {
 609         // Move the focus towards down
 610         MoveFocus(Toolkit::Control::KeyboardFocus::DOWN);
 611       }
 612
 613       isFocusStartableKey = true;
 614     }
 615     else if (keyName == "Prior" && !isAccessibilityEnabled)
 616     {
 617       if(!mIsFocusIndicatorEnabled)
 618       {
 619         // Show focus indicator
 620         mIsFocusIndicatorEnabled = true;
 621       }
 622       else
 623       {
 624         // Move the focus towards the previous page
 625         MoveFocus(Toolkit::Control::KeyboardFocus::PAGE_UP);
 626       }
 627
 628       isFocusStartableKey = true;
 629     }
 630     else if (keyName == "Next" && !isAccessibilityEnabled)
 631     {
 632       if(!mIsFocusIndicatorEnabled)
 633       {
 634         // Show focus indicator
 635         mIsFocusIndicatorEnabled = true;
 636       }
 637       else
 638       {
 639         // Move the focus towards the next page
 640         MoveFocus(Toolkit::Control::KeyboardFocus::PAGE_DOWN);
 641       }
 642
 643       isFocusStartableKey = true;
 644     }
 645     else if (keyName == "Tab" && !isAccessibilityEnabled)
 646     {
 647       if(!mIsFocusIndicatorEnabled)
 648       {
 649         // Show focus indicator
 650         mIsFocusIndicatorEnabled = true;
 651       }
 652       else
 653       {
 654         // "Tab" key changes the focus group in the forward direction and
 655         // "Shift-Tab" key changes it in the backward direction.
 656         DoMoveFocusToNextFocusGroup(!event.IsShiftModifier());
 657       }
 658
 659       isFocusStartableKey = true;
 660     }
 661     else if (keyName == "space" && !isAccessibilityEnabled)
 662     {
 663       if(!mIsFocusIndicatorEnabled)
 664       {
 665         // Show focus indicator
 666         mIsFocusIndicatorEnabled = true;
 667       }
 668
 669       isFocusStartableKey = true;
 670     }
 671     else if (keyName == "" && !isAccessibilityEnabled)
 672     {
 673       // Check the fake key event for evas-plugin case
 674       if(!mIsFocusIndicatorEnabled)
 675       {
 676         // Show focus indicator
 677         mIsFocusIndicatorEnabled = true;
 678       }
 679
 680       isFocusStartableKey = true;
 681     }
 682     else if (keyName == "Backspace" && !isAccessibilityEnabled)
 683     {
 684       // Emit signal to go back to the previous view???
 685     }
 686     else if (keyName == "Escape" && !isAccessibilityEnabled)
 687     {
 688     }
 689   }
 690   else if(event.state == KeyEvent::Up)
 691   {
 692     if (keyName == "Return")
 693     {
 694       if(!mIsFocusIndicatorEnabled && !isAccessibilityEnabled)
 695       {
 696         // Show focus indicator
 697         mIsFocusIndicatorEnabled = true;
 698       }
 699       else
 700       {
 701         // The focused actor has enter pressed on it
 702         Actor actor;
 703         if( !isAccessibilityEnabled )
 704         {
 705           actor = GetCurrentFocusActor();
 706         }
 707         else
 708         {
 709           actor = accessibilityManager.GetCurrentFocusActor();
 710         }
 711
 712         if( actor )
 713         {
 714           DoKeyboardEnter( actor );
 715         }
 716       }
 717
 718       isFocusStartableKey = true;
 719     }
 720   }
 721
 722   if(isFocusStartableKey && mIsFocusIndicatorEnabled && !isAccessibilityEnabled)
 723   {
 724     Actor actor = GetCurrentFocusActor();
 725     if( actor )
 726     {
 727       // Make sure the focused actor is highlighted
 728       actor.Add( GetFocusIndicatorActor() );
 729     }
 730     else
 731     {
 732       // No actor is focused but keyboard focus is activated by the key press
 733       // Let's try to move the initial focus
 734       MoveFocus(Toolkit::Control::KeyboardFocus::RIGHT);
 735     }
 736   }
 737 }
 738
 739 void KeyboardFocusManager::OnTouch(const TouchData& touch)
 740 {
 741   // Clear the focus when user touch the screen.
 742   // We only do this on a Down event, otherwise the clear action may override a manually focused actor.
 743   if( ( touch.GetPointCount() < 1 ) || ( touch.GetState( 0 ) == PointState::DOWN ) )
 744   {
 745     ClearFocus();
 746   }
 747 }
 748
 749 Toolkit::KeyboardFocusManager::PreFocusChangeSignalType& KeyboardFocusManager::PreFocusChangeSignal()
 750 {
 751   return mPreFocusChangeSignal;
 752 }
 753
 754 Toolkit::KeyboardFocusManager::FocusChangedSignalType& KeyboardFocusManager::FocusChangedSignal()
 755 {
 756   return mFocusChangedSignal;
 757 }
 758
 759 Toolkit::KeyboardFocusManager::FocusGroupChangedSignalType& KeyboardFocusManager::FocusGroupChangedSignal()
 760 {
 761   return mFocusGroupChangedSignal;
 762 }
 763
 764 Toolkit::KeyboardFocusManager::FocusedActorEnterKeySignalType& KeyboardFocusManager::FocusedActorEnterKeySignal()
 765 {
 766   return mFocusedActorEnterKeySignal;
 767 }
 768
 769 bool KeyboardFocusManager::DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor )
 770 {
 771   Dali::BaseHandle handle( object );
 772
 773   bool connected( true );
 774   KeyboardFocusManager* manager = static_cast< KeyboardFocusManager* >( object ); // TypeRegistry guarantees that this is the correct type.
 775
 776   if( 0 == strcmp( signalName.c_str(), SIGNAL_PRE_FOCUS_CHANGE ) )
 777   {
 778     manager->PreFocusChangeSignal().Connect( tracker, functor );
 779   }
 780   else if( 0 == strcmp( signalName.c_str(), SIGNAL_FOCUS_CHANGED ) )
 781   {
 782     manager->FocusChangedSignal().Connect( tracker, functor );
 783   }
 784   else if( 0 == strcmp( signalName.c_str(), SIGNAL_FOCUS_GROUP_CHANGED ) )
 785   {
 786     manager->FocusGroupChangedSignal().Connect( tracker, functor );
 787   }
 788   else if( 0 == strcmp( signalName.c_str(), SIGNAL_FOCUSED_ACTOR_ENTER_KEY ) )
 789   {
 790     manager->FocusedActorEnterKeySignal().Connect( tracker, functor );
 791   }
 792   else
 793   {
 794     // signalName does not match any signal
 795     connected = false;
 796   }
 797
 798   return connected;
 799 }
 800
 801 } // namespace Internal
 802
 803 } // namespace Toolkit
 804
 805 } // namespace Dali