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

   1 /*
   2  * Copyright (c) 2014 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/object/type-registry.h>
  30 #include <dali/devel-api/object/type-registry-helper.h>
  31 #include <dali/public-api/images/resource-image.h>
  32 #include <dali/integration-api/debug.h>
  33
  34 // INTERNAL INCLUDES
  35 #include <dali-toolkit/public-api/controls/control.h>
  36 #include <dali-toolkit/public-api/controls/control-impl.h>
  37 #include <dali-toolkit/public-api/accessibility-manager/accessibility-manager.h>
  38 #include <dali-toolkit/devel-api/focus-manager/keyinput-focus-manager.h>
  39
  40 namespace Dali
  41 {
  42
  43 namespace Toolkit
  44 {
  45
  46 namespace Internal
  47 {
  48
  49 namespace // Unnamed namespace
  50 {
  51
  52 #if defined(DEBUG_ENABLED)
  53 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_KEYBOARD_FOCUS_MANAGER");
  54 #endif
  55
  56 const char* const IS_FOCUS_GROUP_PROPERTY_NAME = "is-keyboard-focus-group"; // This property will be replaced by a flag in Control.
  57
  58 const char* const FOCUS_BORDER_IMAGE_PATH = DALI_IMAGE_DIR "keyboard_focus.png";
  59 const Vector4 FOCUS_BORDER_IMAGE_BORDER = Vector4(7.0f, 7.0f, 7.0f, 7.0f);
  60
  61 BaseHandle Create()
  62 {
  63   BaseHandle handle = KeyboardFocusManager::Get();
  64
  65   if ( !handle )
  66   {
  67     SingletonService singletonService( SingletonService::Get() );
  68     if ( singletonService )
  69     {
  70       Toolkit::KeyboardFocusManager manager = Toolkit::KeyboardFocusManager( new Internal::KeyboardFocusManager() );
  71       singletonService.Register( typeid( manager ), manager );
  72       handle = manager;
  73     }
  74   }
  75
  76   return handle;
  77 }
  78
  79 DALI_TYPE_REGISTRATION_BEGIN_CREATE( Toolkit::KeyboardFocusManager, Dali::BaseHandle, Create, true )
  80
  81 DALI_SIGNAL_REGISTRATION( Toolkit, KeyboardFocusManager, "keyboard-pre-focus-change",        SIGNAL_PRE_FOCUS_CHANGE        )
  82 DALI_SIGNAL_REGISTRATION( Toolkit, KeyboardFocusManager, "keyboard-focus-changed",           SIGNAL_FOCUS_CHANGED           )
  83 DALI_SIGNAL_REGISTRATION( Toolkit, KeyboardFocusManager, "keyboard-focus-group-changed",     SIGNAL_FOCUS_GROUP_CHANGED     )
  84 DALI_SIGNAL_REGISTRATION( Toolkit, KeyboardFocusManager, "keyboard-focused-actor-enter-key", SIGNAL_FOCUSED_ACTOR_ENTER_KEY )
  85
  86 DALI_TYPE_REGISTRATION_END()
  87
  88 } // unnamed namespace
  89
  90 Toolkit::KeyboardFocusManager KeyboardFocusManager::Get()
  91 {
  92   Toolkit::KeyboardFocusManager manager;
  93
  94   SingletonService singletonService( SingletonService::Get() );
  95   if ( singletonService )
  96   {
  97     // Check whether the keyboard focus manager is already created
  98     Dali::BaseHandle handle = singletonService.GetSingleton( typeid( Toolkit::KeyboardFocusManager ) );
  99     if(handle)
 100     {
 101       // If so, downcast the handle of singleton to keyboard focus manager
 102       manager = Toolkit::KeyboardFocusManager( dynamic_cast< KeyboardFocusManager* >( handle.GetObjectPtr() ) );
 103     }
 104   }
 105
 106   return manager;
 107 }
 108
 109 KeyboardFocusManager::KeyboardFocusManager()
 110 : mCurrentFocusActor(0),
 111   mFocusIndicatorActor(Actor()),
 112   mFocusGroupLoopEnabled(false),
 113   mIsKeyboardFocusEnabled(false),
 114   mIsFocusIndicatorEnabled(false),
 115   mIsWaitingKeyboardFocusChangeCommit(false),
 116   mSlotDelegate(this)
 117 {
 118   CreateDefaultFocusIndicatorActor();
 119
 120   OnPhysicalKeyboardStatusChanged(PhysicalKeyboard::Get());
 121
 122   Toolkit::KeyInputFocusManager::Get().UnhandledKeyEventSignal().Connect(mSlotDelegate, &KeyboardFocusManager::OnKeyEvent);
 123   Stage::GetCurrent().TouchedSignal().Connect(mSlotDelegate, &KeyboardFocusManager::OnTouched);
 124   PhysicalKeyboard::Get().StatusChangedSignal().Connect(mSlotDelegate, &KeyboardFocusManager::OnPhysicalKeyboardStatusChanged);
 125 }
 126
 127 KeyboardFocusManager::~KeyboardFocusManager()
 128 {
 129 }
 130
 131 bool KeyboardFocusManager::SetCurrentFocusActor(Actor actor)
 132 {
 133   DALI_ASSERT_DEBUG( !mIsWaitingKeyboardFocusChangeCommit && "Calling this function in the PreFocusChangeSignal callback?" );
 134
 135   if(actor)
 136   {
 137     return DoSetCurrentFocusActor(actor.GetId());
 138   }
 139
 140   return false;
 141 }
 142
 143 bool KeyboardFocusManager::DoSetCurrentFocusActor(const unsigned int actorID)
 144 {
 145   Actor rootActor = Stage::GetCurrent().GetRootLayer();
 146   Actor actor = rootActor.FindChildById(actorID);
 147
 148   // Check whether the actor is in the stage
 149   if(actor)
 150   {
 151     // Set the focus only when the actor is keyboard focusable
 152     if(actor.IsKeyboardFocusable())
 153     {
 154       // Draw the focus indicator upon the focused actor
 155       if(mIsFocusIndicatorEnabled && mFocusIndicatorActor)
 156       {
 157         actor.Add(mFocusIndicatorActor);
 158       }
 159
 160       // Send notification for the change of focus actor
 161       if( !mFocusChangedSignal.Empty() )
 162       {
 163         mFocusChangedSignal.Emit(GetCurrentFocusActor(), actor);
 164       }
 165
 166       DALI_LOG_INFO( gLogFilter, Debug::General, "[%s:%d] Focus Changed\n", __FUNCTION__, __LINE__);
 167
 168       // Save the current focused actor
 169       mCurrentFocusActor = actorID;
 170
 171       DALI_LOG_INFO( gLogFilter, Debug::General, "[%s:%d] SUCCEED\n", __FUNCTION__, __LINE__);
 172       return true;
 173     }
 174   }
 175
 176   DALI_LOG_WARNING("[%s:%d] FAILED\n", __FUNCTION__, __LINE__);
 177   return false;
 178 }
 179
 180 Actor KeyboardFocusManager::GetCurrentFocusActor()
 181 {
 182   Actor rootActor = Stage::GetCurrent().GetRootLayer();
 183   return rootActor.FindChildById(mCurrentFocusActor);
 184 }
 185
 186 Actor KeyboardFocusManager::GetCurrentFocusGroup()
 187 {
 188   return GetFocusGroup(GetCurrentFocusActor());
 189 }
 190
 191 bool KeyboardFocusManager::IsLayoutControl(Actor actor) const
 192 {
 193   Toolkit::Control control = Toolkit::Control::DownCast(actor);
 194   return control && GetImplementation( control ).IsKeyboardNavigationSupported();
 195 }
 196
 197 Toolkit::Control KeyboardFocusManager::GetParentLayoutControl(Actor actor) const
 198 {
 199   // Get the actor's parent layout control that supports two dimensional keyboard navigation
 200   Actor rootActor = Stage::GetCurrent().GetRootLayer();
 201   Actor parent;
 202   if(actor)
 203   {
 204     parent = actor.GetParent();
 205   }
 206
 207   while( parent && !IsLayoutControl(parent) && parent != rootActor )
 208   {
 209     parent = parent.GetParent();
 210   }
 211
 212   return Toolkit::Control::DownCast(parent);
 213 }
 214
 215 bool KeyboardFocusManager::MoveFocus(Toolkit::Control::KeyboardFocus::Direction direction)
 216 {
 217   Actor currentFocusActor = GetCurrentFocusActor();
 218
 219   bool succeed = false;
 220
 221   // Go through the actor's hierarchy until we find a layout control that knows how to move the focus
 222   Toolkit::Control parentLayoutControl = GetParentLayoutControl(currentFocusActor);
 223   while(parentLayoutControl && !succeed)
 224   {
 225     succeed = DoMoveFocusWithinLayoutControl(parentLayoutControl, currentFocusActor, direction);
 226     parentLayoutControl = GetParentLayoutControl(parentLayoutControl);
 227   }
 228
 229   if(!succeed && !mPreFocusChangeSignal.Empty())
 230   {
 231     // Don't know how to move the focus further. The application needs to tell us which actor to move the focus to
 232     mIsWaitingKeyboardFocusChangeCommit = true;
 233     Actor nextFocusableActor = mPreFocusChangeSignal.Emit(currentFocusActor, Actor(), direction);
 234     mIsWaitingKeyboardFocusChangeCommit = false;
 235
 236     if ( nextFocusableActor && nextFocusableActor.IsKeyboardFocusable() )
 237     {
 238       // Whether the next focusable actor is a layout control
 239       if(IsLayoutControl(nextFocusableActor))
 240       {
 241         // If so, move the focus inside it.
 242         Toolkit::Control layoutControl = Toolkit::Control::DownCast(nextFocusableActor);
 243         succeed = DoMoveFocusWithinLayoutControl(layoutControl, currentFocusActor, direction);
 244       }
 245       else
 246       {
 247         // Otherwise, just set focus to the next focusable actor
 248         succeed = SetCurrentFocusActor(nextFocusableActor);
 249       }
 250     }
 251   }
 252
 253   return succeed;
 254 }
 255
 256 bool KeyboardFocusManager::DoMoveFocusWithinLayoutControl(Toolkit::Control control, Actor actor, Toolkit::Control::KeyboardFocus::Direction direction)
 257 {
 258   // Ask the control for the next actor to focus
 259   Actor nextFocusableActor = GetImplementation( control ).GetNextKeyboardFocusableActor(actor, direction, mFocusGroupLoopEnabled);
 260   if(nextFocusableActor)
 261   {
 262     if(!nextFocusableActor.IsKeyboardFocusable())
 263     {
 264       // If the actor is not focusable, ask the same layout control for the next actor to focus
 265       return DoMoveFocusWithinLayoutControl(control, nextFocusableActor, direction);
 266     }
 267     else
 268     {
 269       Actor currentFocusActor = GetCurrentFocusActor();
 270       Actor committedFocusActor = nextFocusableActor;
 271
 272       // We will try to move the focus to the actor. Emit a signal to notify the proposed actor to focus
 273       // Signal handler can check the proposed actor and return a different actor if it wishes.
 274       if( !mPreFocusChangeSignal.Empty() )
 275       {
 276         mIsWaitingKeyboardFocusChangeCommit = true;
 277         committedFocusActor = mPreFocusChangeSignal.Emit(currentFocusActor, nextFocusableActor, direction);
 278         mIsWaitingKeyboardFocusChangeCommit = false;
 279       }
 280
 281       if (committedFocusActor && committedFocusActor.IsKeyboardFocusable())
 282       {
 283         // Whether the commited focusable actor is a layout control
 284         if(IsLayoutControl(committedFocusActor))
 285         {
 286           // If so, move the focus inside it.
 287           Toolkit::Control layoutControl = Toolkit::Control::DownCast(committedFocusActor);
 288           return DoMoveFocusWithinLayoutControl(layoutControl, currentFocusActor, direction);
 289         }
 290         else
 291         {
 292           // Otherwise, just set focus to the next focusable actor
 293           if(committedFocusActor == nextFocusableActor)
 294           {
 295             // If the application hasn't changed our proposed actor, we informs the layout control we will
 296             // move the focus to what the control returns. The control might wish to perform some actions
 297             // before the focus is actually moved.
 298             GetImplementation( control ).OnKeyboardFocusChangeCommitted( committedFocusActor );
 299           }
 300
 301           return SetCurrentFocusActor(committedFocusActor);
 302         }
 303       }
 304       else
 305       {
 306         return false;
 307       }
 308     }
 309   }
 310   else
 311   {
 312     // No more actor can be focused in the given direction within the same layout control.
 313     return false;
 314   }
 315 }
 316
 317 bool KeyboardFocusManager::DoMoveFocusToNextFocusGroup(bool forward)
 318 {
 319   bool succeed = false;
 320
 321   // Get the parent layout control of the current focus group
 322   Toolkit::Control parentLayoutControl = GetParentLayoutControl(GetCurrentFocusGroup());
 323
 324   while(parentLayoutControl && !succeed)
 325   {
 326     // If the current focus group has a parent layout control, we can probably automatically
 327     // move the focus to the next focus group in the forward or backward direction.
 328     Toolkit::Control::KeyboardFocus::Direction direction = forward ? Toolkit::Control::KeyboardFocus::RIGHT : Toolkit::Control::KeyboardFocus::LEFT;
 329     succeed = DoMoveFocusWithinLayoutControl(parentLayoutControl, GetCurrentFocusActor(), direction);
 330     parentLayoutControl = GetParentLayoutControl(parentLayoutControl);
 331   }
 332
 333   if(!mFocusGroupChangedSignal.Empty())
 334   {
 335     // Emit a focus group changed signal. The applicaton can move the focus to a new focus group
 336     mFocusGroupChangedSignal.Emit(GetCurrentFocusActor(), forward);
 337   }
 338
 339   return succeed;
 340 }
 341
 342 void KeyboardFocusManager::DoKeyboardEnter(Actor actor)
 343 {
 344   if( actor )
 345   {
 346     Toolkit::Control control = Toolkit::Control::DownCast( actor );
 347     if( control )
 348     {
 349       // Notify the control that enter has been pressed on it.
 350       GetImplementation( control ).KeyboardEnter();
 351     }
 352
 353     // Send a notification for the actor.
 354     if( !mFocusedActorEnterKeySignal.Empty() )
 355     {
 356       mFocusedActorEnterKeySignal.Emit( actor );
 357     }
 358   }
 359 }
 360
 361 void KeyboardFocusManager::ClearFocus()
 362 {
 363   Actor actor = GetCurrentFocusActor();
 364   if(actor)
 365   {
 366     if(mFocusIndicatorActor)
 367     {
 368       actor.Remove(mFocusIndicatorActor);
 369     }
 370
 371     // Send notification for the change of focus actor
 372     if( !mFocusChangedSignal.Empty() )
 373     {
 374       mFocusChangedSignal.Emit(actor, Actor());
 375     }
 376   }
 377
 378   mCurrentFocusActor = 0;
 379   mIsFocusIndicatorEnabled = false;
 380 }
 381
 382 void KeyboardFocusManager::SetFocusGroupLoop(bool enabled)
 383 {
 384   mFocusGroupLoopEnabled = enabled;
 385 }
 386
 387 bool KeyboardFocusManager::GetFocusGroupLoop() const
 388 {
 389   return mFocusGroupLoopEnabled;
 390 }
 391
 392 void KeyboardFocusManager::SetAsFocusGroup(Actor actor, bool isFocusGroup)
 393 {
 394   if(actor)
 395   {
 396     // Create focus group property if not already created.
 397     Property::Index propertyIsFocusGroup = actor.GetPropertyIndex(IS_FOCUS_GROUP_PROPERTY_NAME);
 398     if(propertyIsFocusGroup == Property::INVALID_INDEX)
 399     {
 400       actor.RegisterProperty(IS_FOCUS_GROUP_PROPERTY_NAME, isFocusGroup, Property::READ_WRITE );
 401     }
 402     else
 403     {
 404       actor.SetProperty(propertyIsFocusGroup, isFocusGroup);
 405     }
 406   }
 407 }
 408
 409 bool KeyboardFocusManager::IsFocusGroup(Actor actor) const
 410 {
 411   // Check whether the actor is a focus group
 412   bool isFocusGroup = false;
 413
 414   if(actor)
 415   {
 416     Property::Index propertyIsFocusGroup = actor.GetPropertyIndex(IS_FOCUS_GROUP_PROPERTY_NAME);
 417     if(propertyIsFocusGroup != Property::INVALID_INDEX)
 418     {
 419       isFocusGroup = actor.GetProperty<bool>(propertyIsFocusGroup);
 420     }
 421   }
 422
 423   return isFocusGroup;
 424 }
 425
 426 Actor KeyboardFocusManager::GetFocusGroup(Actor actor)
 427 {
 428   // Go through the actor's hierarchy to check which focus group the actor belongs to
 429   while (actor && !IsFocusGroup(actor))
 430   {
 431     actor = actor.GetParent();
 432   }
 433
 434   return actor;
 435 }
 436
 437 void KeyboardFocusManager::SetFocusIndicatorActor(Actor indicator)
 438 {
 439   if(mFocusIndicatorActor != indicator)
 440   {
 441     Actor currentFocusActor = GetCurrentFocusActor();
 442     if(currentFocusActor)
 443     {
 444       // The new focus indicator should be added to the current focused actor immediately
 445       if(mFocusIndicatorActor)
 446       {
 447         currentFocusActor.Remove(mFocusIndicatorActor);
 448       }
 449
 450       if(indicator)
 451       {
 452         currentFocusActor.Add(indicator);
 453       }
 454     }
 455
 456     mFocusIndicatorActor = indicator;
 457   }
 458 }
 459
 460 Actor KeyboardFocusManager::GetFocusIndicatorActor()
 461 {
 462   return mFocusIndicatorActor;
 463 }
 464
 465 void KeyboardFocusManager::CreateDefaultFocusIndicatorActor()
 466 {
 467   // Create a focus indicator actor shared by all the keyboard focusable actors
 468   Image borderImage = ResourceImage::New(FOCUS_BORDER_IMAGE_PATH);
 469
 470   ImageActor focusIndicator = ImageActor::New(borderImage);
 471   focusIndicator.SetPositionInheritanceMode( Dali::USE_PARENT_POSITION_PLUS_LOCAL_POSITION );
 472   focusIndicator.SetStyle( ImageActor::STYLE_NINE_PATCH );
 473   focusIndicator.SetNinePatchBorder(FOCUS_BORDER_IMAGE_BORDER);
 474   focusIndicator.SetPosition(Vector3(0.0f, 0.0f, 1.0f));
 475
 476   // Apply size constraint to the focus indicator
 477   focusIndicator.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::ALL_DIMENSIONS );
 478
 479   SetFocusIndicatorActor(focusIndicator);
 480 }
 481
 482 void KeyboardFocusManager::OnPhysicalKeyboardStatusChanged(PhysicalKeyboard keyboard)
 483 {
 484   mIsKeyboardFocusEnabled = keyboard.IsAttached();
 485
 486   if(mIsKeyboardFocusEnabled)
 487   {
 488     // Show indicator when keyboard focus turned on if there is focused actor.
 489     Actor actor = GetCurrentFocusActor();
 490     if(actor)
 491     {
 492       if(mFocusIndicatorActor)
 493       {
 494         actor.Add(mFocusIndicatorActor);
 495       }
 496     }
 497     mIsFocusIndicatorEnabled = true;
 498   }
 499   else
 500   {
 501     // Hide indicator when keyboard focus turned off
 502     Actor actor = GetCurrentFocusActor();
 503     if(actor)
 504     {
 505       actor.Remove(mFocusIndicatorActor);
 506     }
 507     mIsFocusIndicatorEnabled = false;
 508   }
 509 }
 510
 511 void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
 512 {
 513   if(!mIsKeyboardFocusEnabled)
 514   {
 515     return;
 516   }
 517
 518   AccessibilityAdaptor accessibilityAdaptor = AccessibilityAdaptor::Get();
 519   bool isAccessibilityEnabled = accessibilityAdaptor.IsEnabled();
 520
 521   Toolkit::AccessibilityManager accessibilityManager = Toolkit::AccessibilityManager::Get();
 522
 523   std::string keyName = event.keyPressedName;
 524
 525   bool isFocusStartableKey = false;
 526
 527   if(event.state == KeyEvent::Down)
 528   {
 529     if (keyName == "Left")
 530     {
 531       if(!isAccessibilityEnabled)
 532       {
 533         if(!mIsFocusIndicatorEnabled)
 534         {
 535           // Show focus indicator
 536           mIsFocusIndicatorEnabled = true;
 537         }
 538         else
 539         {
 540           // Move the focus towards left
 541           MoveFocus(Toolkit::Control::KeyboardFocus::LEFT);
 542         }
 543
 544         isFocusStartableKey = true;
 545       }
 546       else
 547       {
 548         // Move the accessibility focus backward
 549         accessibilityManager.MoveFocusBackward();
 550       }
 551     }
 552     else if (keyName == "Right")
 553     {
 554       if(!isAccessibilityEnabled)
 555       {
 556         if(!mIsFocusIndicatorEnabled)
 557         {
 558           // Show focus indicator
 559           mIsFocusIndicatorEnabled = true;
 560         }
 561         else
 562         {
 563           // Move the focus towards right
 564           MoveFocus(Toolkit::Control::KeyboardFocus::RIGHT);
 565         }
 566       }
 567       else
 568       {
 569         // Move the accessibility focus forward
 570         accessibilityManager.MoveFocusForward();
 571       }
 572
 573       isFocusStartableKey = true;
 574     }
 575     else if (keyName == "Up" && !isAccessibilityEnabled)
 576     {
 577       if(!mIsFocusIndicatorEnabled)
 578       {
 579         // Show focus indicator
 580         mIsFocusIndicatorEnabled = true;
 581       }
 582       else
 583       {
 584         // Move the focus towards up
 585         MoveFocus(Toolkit::Control::KeyboardFocus::UP);
 586       }
 587
 588       isFocusStartableKey = true;
 589     }
 590     else if (keyName == "Down" && !isAccessibilityEnabled)
 591     {
 592       if(!mIsFocusIndicatorEnabled)
 593       {
 594         // Show focus indicator
 595         mIsFocusIndicatorEnabled = true;
 596       }
 597       else
 598       {
 599         // Move the focus towards down
 600         MoveFocus(Toolkit::Control::KeyboardFocus::DOWN);
 601       }
 602
 603       isFocusStartableKey = true;
 604     }
 605     else if (keyName == "Tab" && !isAccessibilityEnabled)
 606     {
 607       if(!mIsFocusIndicatorEnabled)
 608       {
 609         // Show focus indicator
 610         mIsFocusIndicatorEnabled = true;
 611       }
 612       else
 613       {
 614         // "Tab" key changes the focus group in the forward direction and
 615         // "Shift-Tab" key changes it in the backward direction.
 616         DoMoveFocusToNextFocusGroup(!event.IsShiftModifier());
 617       }
 618
 619       isFocusStartableKey = true;
 620     }
 621     else if (keyName == "space" && !isAccessibilityEnabled)
 622     {
 623       if(!mIsFocusIndicatorEnabled)
 624       {
 625         // Show focus indicator
 626         mIsFocusIndicatorEnabled = true;
 627       }
 628
 629       isFocusStartableKey = true;
 630     }
 631     else if (keyName == "" && !isAccessibilityEnabled)
 632     {
 633       // Check the fake key event for evas-plugin case
 634       if(!mIsFocusIndicatorEnabled)
 635       {
 636         // Show focus indicator
 637         mIsFocusIndicatorEnabled = true;
 638       }
 639
 640       isFocusStartableKey = true;
 641     }
 642     else if (keyName == "Backspace" && !isAccessibilityEnabled)
 643     {
 644       // Emit signal to go back to the previous view???
 645     }
 646   }
 647   else if(event.state == KeyEvent::Up)
 648   {
 649     if (keyName == "Return")
 650     {
 651       if(!mIsFocusIndicatorEnabled && !isAccessibilityEnabled)
 652       {
 653         // Show focus indicator
 654         mIsFocusIndicatorEnabled = true;
 655       }
 656       else
 657       {
 658         // The focused actor has enter pressed on it
 659         Actor actor;
 660         if( !isAccessibilityEnabled )
 661         {
 662           actor = GetCurrentFocusActor();
 663         }
 664         else
 665         {
 666           actor = accessibilityManager.GetCurrentFocusActor();
 667         }
 668
 669         if( actor )
 670         {
 671           DoKeyboardEnter( actor );
 672         }
 673       }
 674
 675       isFocusStartableKey = true;
 676     }
 677   }
 678
 679   if(isFocusStartableKey && mIsFocusIndicatorEnabled && !isAccessibilityEnabled)
 680   {
 681     Actor actor = GetCurrentFocusActor();
 682     if( !actor )
 683     {
 684       // No actor is focused but keyboard focus is activated by the key press
 685       // Let's try to move the initial focus
 686       MoveFocus(Toolkit::Control::KeyboardFocus::RIGHT);
 687     }
 688     else if(mFocusIndicatorActor)
 689     {
 690       // Make sure the focused actor is highlighted
 691       actor.Add(mFocusIndicatorActor);
 692     }
 693   }
 694 }
 695
 696 void KeyboardFocusManager::OnTouched(const TouchEvent& touchEvent)
 697 {
 698   // Clear the focus when user touch the screen
 699   ClearFocus();
 700 }
 701
 702 Toolkit::KeyboardFocusManager::PreFocusChangeSignalType& KeyboardFocusManager::PreFocusChangeSignal()
 703 {
 704   return mPreFocusChangeSignal;
 705 }
 706
 707 Toolkit::KeyboardFocusManager::FocusChangedSignalType& KeyboardFocusManager::FocusChangedSignal()
 708 {
 709   return mFocusChangedSignal;
 710 }
 711
 712 Toolkit::KeyboardFocusManager::FocusGroupChangedSignalType& KeyboardFocusManager::FocusGroupChangedSignal()
 713 {
 714   return mFocusGroupChangedSignal;
 715 }
 716
 717 Toolkit::KeyboardFocusManager::FocusedActorEnterKeySignalType& KeyboardFocusManager::FocusedActorEnterKeySignal()
 718 {
 719   return mFocusedActorEnterKeySignal;
 720 }
 721
 722 bool KeyboardFocusManager::DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor )
 723 {
 724   Dali::BaseHandle handle( object );
 725
 726   bool connected( true );
 727   KeyboardFocusManager* manager = dynamic_cast<KeyboardFocusManager*>( object );
 728
 729   if( 0 == strcmp( signalName.c_str(), SIGNAL_PRE_FOCUS_CHANGE ) )
 730   {
 731     manager->PreFocusChangeSignal().Connect( tracker, functor );
 732   }
 733   if( 0 == strcmp( signalName.c_str(), SIGNAL_FOCUS_CHANGED ) )
 734   {
 735     manager->FocusChangedSignal().Connect( tracker, functor );
 736   }
 737   if( 0 == strcmp( signalName.c_str(), SIGNAL_FOCUS_GROUP_CHANGED ) )
 738   {
 739     manager->FocusGroupChangedSignal().Connect( tracker, functor );
 740   }
 741   else if( 0 == strcmp( signalName.c_str(), SIGNAL_FOCUSED_ACTOR_ENTER_KEY ) )
 742   {
 743     manager->FocusedActorEnterKeySignal().Connect( tracker, functor );
 744   }
 745   else
 746   {
 747     // signalName does not match any signal
 748     connected = false;
 749   }
 750
 751   return connected;
 752 }
 753
 754 } // namespace Internal
 755
 756 } // namespace Toolkit
 757
 758 } // namespace Dali