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

   1 //
   2 // Copyright (c) 2014 Samsung Electronics Co., Ltd.
   3 //
   4 // Licensed under the Flora License, Version 1.0 (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://floralicense.org/license/
   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 // CLASS HEADER
  18 #include "keyboard-focus-manager-impl.h"
  19
  20 // INTERNAL INCLUDES
  21 #include <dali-toolkit/public-api/controls/control.h>
  22 #include <dali-toolkit/public-api/controls/control-impl.h>
  23 #include <dali-toolkit/public-api/focus-manager/focus-manager.h>
  24 #include <dali-toolkit/public-api/focus-manager/keyinput-focus-manager.h>
  25 #include <dali/integration-api/debug.h>
  26
  27 namespace Dali
  28 {
  29
  30 namespace Toolkit
  31 {
  32
  33 namespace Internal
  34 {
  35
  36 namespace // unnamed namespace
  37 {
  38
  39 #if defined(DEBUG_ENABLED)
  40 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_KEYBOARD_FOCUS_MANAGER");
  41 #endif
  42
  43 const std::string IS_FOCUS_GROUP_PROPERTY_NAME("is-keyboard-focus-group"); // This property will be replaced by a flag in ControlImpl.
  44
  45 const char* FOCUS_BORDER_IMAGE_PATH = DALI_IMAGE_DIR "keyboard_focus.png";
  46 const Vector4 FOCUS_BORDER_IMAGE_BORDER = Vector4(7.0f, 7.0f, 7.0f, 7.0f);
  47
  48 BaseHandle Create()
  49 {
  50   BaseHandle handle = KeyboardFocusManager::Get();
  51
  52   if ( !handle && Adaptor::IsAvailable() )
  53   {
  54     Toolkit::KeyboardFocusManager manager = Toolkit::KeyboardFocusManager( new Internal::KeyboardFocusManager() );
  55     Adaptor::Get().RegisterSingleton( typeid( manager ), manager );
  56     handle = manager;
  57   }
  58
  59   return handle;
  60 }
  61 TypeRegistration KEYBOARD_FOCUS_MANAGER_TYPE( typeid(Dali::Toolkit::KeyboardFocusManager), typeid(Dali::BaseHandle), Create, true /* Create instance at startup */ );
  62
  63 } // unnamed namespace
  64
  65 Toolkit::KeyboardFocusManager KeyboardFocusManager::Get()
  66 {
  67   Toolkit::KeyboardFocusManager manager;
  68
  69   if ( Adaptor::IsAvailable() )
  70   {
  71     // Check whether the keyboard focus manager is already created
  72     Dali::BaseHandle handle = Dali::Adaptor::Get().GetSingleton( typeid( Toolkit::KeyboardFocusManager ) );
  73     if(handle)
  74     {
  75       // If so, downcast the handle of singleton to keyboard focus manager
  76       manager = Toolkit::KeyboardFocusManager( dynamic_cast< KeyboardFocusManager* >( handle.GetObjectPtr() ) );
  77     }
  78   }
  79
  80   return manager;
  81 }
  82
  83 KeyboardFocusManager::KeyboardFocusManager()
  84 : mCurrentFocusActor(0),
  85   mFocusIndicatorActor(Actor()),
  86   mFocusGroupLoopEnabled(false),
  87   mIsKeyboardFocusEnabled(false),
  88   mIsFocusIndicatorEnabled(false),
  89   mIsWaitingKeyboardFocusChangeCommit(false),
  90   mSlotDelegate(this)
  91 {
  92   CreateDefaultFocusIndicatorActor();
  93
  94   OnPhysicalKeyboardStatusChanged(PhysicalKeyboard::Get());
  95
  96   Toolkit::KeyInputFocusManager::Get().UnhandledKeyEventSignal().Connect(mSlotDelegate, &KeyboardFocusManager::OnKeyEvent);
  97   Stage::GetCurrent().TouchedSignal().Connect(mSlotDelegate, &KeyboardFocusManager::OnTouched);
  98   PhysicalKeyboard::Get().StatusChangedSignal().Connect(mSlotDelegate, &KeyboardFocusManager::OnPhysicalKeyboardStatusChanged);
  99 }
 100
 101 KeyboardFocusManager::~KeyboardFocusManager()
 102 {
 103 }
 104
 105 bool KeyboardFocusManager::SetCurrentFocusActor(Actor actor)
 106 {
 107   DALI_ASSERT_DEBUG( !mIsWaitingKeyboardFocusChangeCommit && "Calling this function in the PreFocusChangeSignal callback?" );
 108
 109   if(actor)
 110   {
 111     return DoSetCurrentFocusActor(actor.GetId());
 112   }
 113
 114   return false;
 115 }
 116
 117 bool KeyboardFocusManager::DoSetCurrentFocusActor(const unsigned int actorID)
 118 {
 119   Actor rootActor = Stage::GetCurrent().GetRootLayer();
 120   Actor actor = rootActor.FindChildById(actorID);
 121
 122   // Check whether the actor is in the stage
 123   if(actor)
 124   {
 125     // Set the focus only when the actor is keyboard focusable
 126     if(actor.IsKeyboardFocusable())
 127     {
 128       // Draw the focus indicator upon the focused actor
 129       if(mIsFocusIndicatorEnabled && mFocusIndicatorActor)
 130       {
 131         actor.Add(mFocusIndicatorActor);
 132       }
 133
 134       // Send notification for the change of focus actor
 135       if( !mFocusChangedSignalV2.Empty() )
 136       {
 137         mFocusChangedSignalV2.Emit(GetCurrentFocusActor(), actor);
 138       }
 139
 140       DALI_LOG_INFO( gLogFilter, Debug::General, "[%s:%d] Focus Changed\n", __FUNCTION__, __LINE__);
 141
 142       // Save the current focused actor
 143       mCurrentFocusActor = actorID;
 144
 145       // Move the accessibility focus to the same actor
 146 //      Toolkit::FocusManager focusManager = Toolkit::FocusManager::Get();
 147 //      focusManager.SetCurrentFocusActor(actor);
 148
 149       DALI_LOG_INFO( gLogFilter, Debug::General, "[%s:%d] SUCCEED\n", __FUNCTION__, __LINE__);
 150       return true;
 151     }
 152   }
 153
 154   DALI_LOG_WARNING("[%s:%d] FAILED\n", __FUNCTION__, __LINE__);
 155   return false;
 156 }
 157
 158 Actor KeyboardFocusManager::GetCurrentFocusActor()
 159 {
 160   Actor rootActor = Stage::GetCurrent().GetRootLayer();
 161   return rootActor.FindChildById(mCurrentFocusActor);
 162 }
 163
 164 Actor KeyboardFocusManager::GetCurrentFocusGroup()
 165 {
 166   return GetFocusGroup(GetCurrentFocusActor());
 167 }
 168
 169 bool KeyboardFocusManager::IsLayoutControl(Actor actor) const
 170 {
 171   Toolkit::Control control = Toolkit::Control::DownCast(actor);
 172   return control && control.GetImplementation().IsKeyboardNavigationSupported();
 173 }
 174
 175 Toolkit::Control KeyboardFocusManager::GetParentLayoutControl(Actor actor) const
 176 {
 177   // Get the actor's parent layout control that supports two dimensional keyboard navigation
 178   Actor rootActor = Stage::GetCurrent().GetRootLayer();
 179   Actor parent;
 180   if(actor)
 181   {
 182     parent = actor.GetParent();
 183   }
 184
 185   while( parent && !IsLayoutControl(parent) && parent != rootActor )
 186   {
 187     parent = parent.GetParent();
 188   }
 189
 190   return Toolkit::Control::DownCast(parent);
 191 }
 192
 193 bool KeyboardFocusManager::MoveFocus(Toolkit::Control::KeyboardFocusNavigationDirection direction)
 194 {
 195   Actor currentFocusActor = GetCurrentFocusActor();
 196
 197   bool succeed = false;
 198
 199   // Go through the actor's hierarchy until we find a layout control that knows how to move the focus
 200   Toolkit::Control parentLayoutControl = GetParentLayoutControl(currentFocusActor);
 201   while(parentLayoutControl && !succeed)
 202   {
 203     succeed = DoMoveFocusWithinLayoutControl(parentLayoutControl, currentFocusActor, direction);
 204     parentLayoutControl = GetParentLayoutControl(parentLayoutControl);
 205   }
 206
 207   if(!succeed && !mPreFocusChangeSignalV2.Empty())
 208   {
 209     // Don't know how to move the focus further. The application needs to tell us which actor to move the focus to
 210     mIsWaitingKeyboardFocusChangeCommit = true;
 211     Actor nextFocusableActor = mPreFocusChangeSignalV2.Emit(currentFocusActor, Actor(), direction);
 212     mIsWaitingKeyboardFocusChangeCommit = false;
 213
 214     if ( nextFocusableActor && nextFocusableActor.IsKeyboardFocusable() )
 215     {
 216       // Whether the next focusable actor is a layout control
 217       if(IsLayoutControl(nextFocusableActor))
 218       {
 219         // If so, move the focus inside it.
 220         Toolkit::Control layoutControl = Toolkit::Control::DownCast(nextFocusableActor);
 221         succeed = DoMoveFocusWithinLayoutControl(layoutControl, currentFocusActor, direction);
 222       }
 223       else
 224       {
 225         // Otherwise, just set focus to the next focusable actor
 226         succeed = SetCurrentFocusActor(nextFocusableActor);
 227       }
 228     }
 229   }
 230
 231   return succeed;
 232 }
 233
 234 bool KeyboardFocusManager::DoMoveFocusWithinLayoutControl(Toolkit::Control control, Actor actor, Toolkit::Control::KeyboardFocusNavigationDirection direction)
 235 {
 236   // Ask the control for the next actor to focus
 237   Actor nextFocusableActor = control.GetImplementation().GetNextKeyboardFocusableActor(actor, direction, mFocusGroupLoopEnabled);
 238   if(nextFocusableActor)
 239   {
 240     if(!nextFocusableActor.IsKeyboardFocusable())
 241     {
 242       // If the actor is not focusable, ask the same layout control for the next actor to focus
 243       return DoMoveFocusWithinLayoutControl(control, nextFocusableActor, direction);
 244     }
 245     else
 246     {
 247       Actor currentFocusActor = GetCurrentFocusActor();
 248       Actor committedFocusActor = nextFocusableActor;
 249
 250       // We will try to move the focus to the actor. Emit a signal to notify the proposed actor to focus
 251       // Signal handler can check the proposed actor and return a different actor if it wishes.
 252       if( !mPreFocusChangeSignalV2.Empty() )
 253       {
 254         mIsWaitingKeyboardFocusChangeCommit = true;
 255         committedFocusActor = mPreFocusChangeSignalV2.Emit(currentFocusActor, nextFocusableActor, direction);
 256         mIsWaitingKeyboardFocusChangeCommit = false;
 257       }
 258
 259       if (committedFocusActor && committedFocusActor.IsKeyboardFocusable())
 260       {
 261         // Whether the commited focusable actor is a layout control
 262         if(IsLayoutControl(committedFocusActor))
 263         {
 264           // If so, move the focus inside it.
 265           Toolkit::Control layoutControl = Toolkit::Control::DownCast(committedFocusActor);
 266           return DoMoveFocusWithinLayoutControl(layoutControl, currentFocusActor, direction);
 267         }
 268         else
 269         {
 270           // Otherwise, just set focus to the next focusable actor
 271           if(committedFocusActor == nextFocusableActor)
 272           {
 273             // If the application hasn't changed our proposed actor, we informs the layout control we will
 274             // move the focus to what the control returns. The control might wish to perform some actions
 275             // before the focus is actually moved.
 276             control.GetImplementation().OnKeyboardFocusChangeCommitted(committedFocusActor);
 277           }
 278
 279           return SetCurrentFocusActor(committedFocusActor);
 280         }
 281       }
 282       else
 283       {
 284         return false;
 285       }
 286     }
 287   }
 288   else
 289   {
 290     // No more actor can be focused in the given direction within the same layout control.
 291     return false;
 292   }
 293 }
 294
 295 bool KeyboardFocusManager::DoMoveFocusToNextFocusGroup(bool forward)
 296 {
 297   bool succeed = false;
 298
 299   // Get the parent layout control of the current focus group
 300   Toolkit::Control parentLayoutControl = GetParentLayoutControl(GetCurrentFocusGroup());
 301
 302   while(parentLayoutControl && !succeed)
 303   {
 304     // If the current focus group has a parent layout control, we can probably automatically
 305     // move the focus to the next focus group in the forward or backward direction.
 306     Toolkit::Control::KeyboardFocusNavigationDirection direction = forward ? Toolkit::Control::Right : Toolkit::Control::Left;
 307     succeed = DoMoveFocusWithinLayoutControl(parentLayoutControl, GetCurrentFocusActor(), direction);
 308     parentLayoutControl = GetParentLayoutControl(parentLayoutControl);
 309   }
 310
 311   if(!mFocusGroupChangedSignalV2.Empty())
 312   {
 313     // Emit a focus group changed signal. The applicaton can move the focus to a new focus group
 314     mFocusGroupChangedSignalV2.Emit(GetCurrentFocusActor(), forward);
 315   }
 316
 317   return succeed;
 318 }
 319
 320 void KeyboardFocusManager::DoActivate(Actor actor)
 321 {
 322   if(actor)
 323   {
 324     Toolkit::Control control = Toolkit::Control::DownCast(actor);
 325     if(control)
 326     {
 327       // Notify the control that it is activated
 328       control.GetImplementation().OnActivated();
 329     }
 330
 331     // Send notification for the activation of focused actor
 332     if( !mFocusedActorActivatedSignalV2.Empty() )
 333     {
 334       mFocusedActorActivatedSignalV2.Emit(actor);
 335     }
 336   }
 337 }
 338
 339 void KeyboardFocusManager::ClearFocus()
 340 {
 341   Actor actor = GetCurrentFocusActor();
 342   if(actor)
 343   {
 344     if(mFocusIndicatorActor)
 345     {
 346       actor.Remove(mFocusIndicatorActor);
 347     }
 348
 349     // Send notification for the change of focus actor
 350     if( !mFocusChangedSignalV2.Empty() )
 351     {
 352       mFocusChangedSignalV2.Emit(actor, Actor());
 353     }
 354   }
 355
 356   mCurrentFocusActor = 0;
 357   mIsFocusIndicatorEnabled = false;
 358 }
 359
 360 void KeyboardFocusManager::SetFocusGroupLoop(bool enabled)
 361 {
 362   mFocusGroupLoopEnabled = enabled;
 363 }
 364
 365 bool KeyboardFocusManager::GetFocusGroupLoop() const
 366 {
 367   return mFocusGroupLoopEnabled;
 368 }
 369
 370 void KeyboardFocusManager::SetAsFocusGroup(Actor actor, bool isFocusGroup)
 371 {
 372   if(actor)
 373   {
 374     // Create focus group property if not already created.
 375     Property::Index propertyIsFocusGroup = actor.GetPropertyIndex(IS_FOCUS_GROUP_PROPERTY_NAME);
 376     if(propertyIsFocusGroup == Property::INVALID_INDEX)
 377     {
 378       propertyIsFocusGroup = actor.RegisterProperty(IS_FOCUS_GROUP_PROPERTY_NAME, isFocusGroup);
 379     }
 380     else
 381     {
 382       actor.SetProperty(propertyIsFocusGroup, isFocusGroup);
 383     }
 384   }
 385 }
 386
 387 bool KeyboardFocusManager::IsFocusGroup(Actor actor) const
 388 {
 389   // Check whether the actor is a focus group
 390   bool isFocusGroup = false;
 391
 392   if(actor)
 393   {
 394     Property::Index propertyIsFocusGroup = actor.GetPropertyIndex(IS_FOCUS_GROUP_PROPERTY_NAME);
 395     if(propertyIsFocusGroup != Property::INVALID_INDEX)
 396     {
 397       isFocusGroup = actor.GetProperty<bool>(propertyIsFocusGroup);
 398     }
 399   }
 400
 401   return isFocusGroup;
 402 }
 403
 404 Actor KeyboardFocusManager::GetFocusGroup(Actor actor)
 405 {
 406   // Go through the actor's hierarchy to check which focus group the actor belongs to
 407   while (actor && !IsFocusGroup(actor))
 408   {
 409     actor = actor.GetParent();
 410   }
 411
 412   return actor;
 413 }
 414
 415 void KeyboardFocusManager::SetFocusIndicatorActor(Actor indicator)
 416 {
 417   mFocusIndicatorActor = indicator;
 418 }
 419
 420 Actor KeyboardFocusManager::GetFocusIndicatorActor()
 421 {
 422   return mFocusIndicatorActor;
 423 }
 424
 425 void KeyboardFocusManager::CreateDefaultFocusIndicatorActor()
 426 {
 427   // Create a focus indicator actor shared by all the keyboard focusable actors
 428   Image borderImage = Image::New(FOCUS_BORDER_IMAGE_PATH);
 429
 430   ImageActor focusIndicator = ImageActor::New(borderImage);
 431   focusIndicator.SetPositionInheritanceMode( Dali::USE_PARENT_POSITION_PLUS_LOCAL_POSITION );
 432   focusIndicator.SetStyle( ImageActor::STYLE_NINE_PATCH );
 433   focusIndicator.SetNinePatchBorder(FOCUS_BORDER_IMAGE_BORDER);
 434   focusIndicator.SetPosition(Vector3(0.0f, 0.0f, 1.0f));
 435
 436   // Apply size constraint to the focus indicator
 437   Constraint constraint = Constraint::New<Vector3>(Actor::SIZE,
 438                                                    ParentSource(Actor::SIZE),
 439                                                    EqualToConstraint());
 440   focusIndicator.ApplyConstraint(constraint);
 441
 442   SetFocusIndicatorActor(focusIndicator);
 443 }
 444
 445 void KeyboardFocusManager::OnPhysicalKeyboardStatusChanged(PhysicalKeyboard keyboard)
 446 {
 447   mIsKeyboardFocusEnabled = keyboard.IsAttached();
 448
 449   if(mIsKeyboardFocusEnabled)
 450   {
 451     // Show indicator when keyboard focus turned on if there is focused actor.
 452     Actor actor = GetCurrentFocusActor();
 453     if(actor)
 454     {
 455       if(mFocusIndicatorActor)
 456       {
 457         actor.Add(mFocusIndicatorActor);
 458       }
 459     }
 460     mIsFocusIndicatorEnabled = true;
 461   }
 462   else
 463   {
 464     // Hide indicator when keyboard focus turned off
 465     Actor actor = GetCurrentFocusActor();
 466     if(actor)
 467     {
 468       actor.Remove(mFocusIndicatorActor);
 469     }
 470     mIsFocusIndicatorEnabled = false;
 471   }
 472 }
 473
 474 void KeyboardFocusManager::OnKeyEvent(const KeyEvent& event)
 475 {
 476   if(!mIsKeyboardFocusEnabled)
 477   {
 478     return;
 479   }
 480
 481   AccessibilityManager accessibilityManager = AccessibilityManager::Get();
 482   bool isAccessibilityEnabled = accessibilityManager.IsEnabled();
 483
 484   Toolkit::FocusManager accessibilityFocusManager = Toolkit::FocusManager::Get();
 485
 486   std::string keyName = event.keyPressedName;
 487
 488   bool isFocusStartableKey = false;
 489
 490   if(event.state == KeyEvent::Down)
 491   {
 492     if (keyName == "Left")
 493     {
 494       if(!isAccessibilityEnabled)
 495       {
 496         if(!mIsFocusIndicatorEnabled)
 497         {
 498           // Show focus indicator
 499           mIsFocusIndicatorEnabled = true;
 500         }
 501         else
 502         {
 503           // Move the focus towards left
 504           MoveFocus(Toolkit::Control::Left);
 505         }
 506
 507         isFocusStartableKey = true;
 508       }
 509       else
 510       {
 511         // Move the accessibility focus backward
 512         accessibilityFocusManager.MoveFocusBackward();
 513       }
 514     }
 515     else if (keyName == "Right")
 516     {
 517       if(!isAccessibilityEnabled)
 518       {
 519         if(!mIsFocusIndicatorEnabled)
 520         {
 521           // Show focus indicator
 522           mIsFocusIndicatorEnabled = true;
 523         }
 524         else
 525         {
 526           // Move the focus towards right
 527           MoveFocus(Toolkit::Control::Right);
 528         }
 529
 530         isFocusStartableKey = true;
 531       }
 532       else
 533       {
 534         // Move the accessibility focus forward
 535         accessibilityFocusManager.MoveFocusForward();
 536       }
 537
 538       isFocusStartableKey = true;
 539     }
 540     else if (keyName == "Up" && !isAccessibilityEnabled)
 541     {
 542       if(!mIsFocusIndicatorEnabled)
 543       {
 544         // Show focus indicator
 545         mIsFocusIndicatorEnabled = true;
 546       }
 547       else
 548       {
 549         // Move the focus towards up
 550         MoveFocus(Toolkit::Control::Up);
 551       }
 552
 553       isFocusStartableKey = true;
 554     }
 555     else if (keyName == "Down" && !isAccessibilityEnabled)
 556     {
 557       if(!mIsFocusIndicatorEnabled)
 558       {
 559         // Show focus indicator
 560         mIsFocusIndicatorEnabled = true;
 561       }
 562       else
 563       {
 564         // Move the focus towards down
 565         MoveFocus(Toolkit::Control::Down);
 566       }
 567
 568       isFocusStartableKey = true;
 569     }
 570     else if (keyName == "Tab" && !isAccessibilityEnabled)
 571     {
 572       if(!mIsFocusIndicatorEnabled)
 573       {
 574         // Show focus indicator
 575         mIsFocusIndicatorEnabled = true;
 576       }
 577       else
 578       {
 579         // "Tab" key changes the focus group in the forward direction and
 580         // "Shift-Tab" key changes it in the backward direction.
 581         DoMoveFocusToNextFocusGroup(!event.IsShiftModifier());
 582       }
 583
 584       isFocusStartableKey = true;
 585     }
 586     else if (keyName == "space" && !isAccessibilityEnabled)
 587     {
 588       if(!mIsFocusIndicatorEnabled)
 589       {
 590         // Show focus indicator
 591         mIsFocusIndicatorEnabled = true;
 592       }
 593
 594       isFocusStartableKey = true;
 595     }
 596     else if (keyName == "" && !isAccessibilityEnabled)
 597     {
 598       // Check the fake key event for evas-plugin case
 599       if(!mIsFocusIndicatorEnabled)
 600       {
 601         // Show focus indicator
 602         mIsFocusIndicatorEnabled = true;
 603       }
 604
 605       isFocusStartableKey = true;
 606     }
 607     else if (keyName == "Backspace" && !isAccessibilityEnabled)
 608     {
 609       // Emit signal to go back to the previous view???
 610     }
 611   }
 612   else if(event.state == KeyEvent::Up)
 613   {
 614     if (keyName == "Return")
 615     {
 616       if(!mIsFocusIndicatorEnabled && !isAccessibilityEnabled)
 617       {
 618         // Show focus indicator
 619         mIsFocusIndicatorEnabled = true;
 620       }
 621       else
 622       {
 623         // Activate the focused actor
 624         Actor actor;
 625         if(!isAccessibilityEnabled)
 626         {
 627           actor = GetCurrentFocusActor();
 628         }
 629         else
 630         {
 631           actor = accessibilityFocusManager.GetCurrentFocusActor();
 632         }
 633
 634         if(actor)
 635         {
 636           DoActivate(actor);
 637         }
 638       }
 639
 640       isFocusStartableKey = true;
 641     }
 642   }
 643
 644   if(isFocusStartableKey && mIsFocusIndicatorEnabled && !isAccessibilityEnabled)
 645   {
 646     Actor actor = GetCurrentFocusActor();
 647     if( !actor )
 648     {
 649       // No actor is focused but keyboard focus is activated by the key press
 650       // Let's try to move the initial focus
 651       MoveFocus(Toolkit::Control::Right);
 652     }
 653     else if(mFocusIndicatorActor)
 654     {
 655       // Make sure the focused actor is highlighted
 656       actor.Add(mFocusIndicatorActor);
 657     }
 658   }
 659 }
 660
 661 void KeyboardFocusManager::OnTouched(const TouchEvent& touchEvent)
 662 {
 663   // Clear the focus when user touch the screen
 664   ClearFocus();
 665 }
 666
 667 Toolkit::KeyboardFocusManager::PreFocusChangeSignalV2& KeyboardFocusManager::PreFocusChangeSignal()
 668 {
 669   return mPreFocusChangeSignalV2;
 670 }
 671
 672 Toolkit::KeyboardFocusManager::FocusChangedSignalV2& KeyboardFocusManager::FocusChangedSignal()
 673 {
 674   return mFocusChangedSignalV2;
 675 }
 676
 677 Toolkit::KeyboardFocusManager::FocusGroupChangedSignalV2& KeyboardFocusManager::FocusGroupChangedSignal()
 678 {
 679   return mFocusGroupChangedSignalV2;
 680 }
 681
 682 Toolkit::KeyboardFocusManager::FocusedActorActivatedSignalV2& KeyboardFocusManager::FocusedActorActivatedSignal()
 683 {
 684   return mFocusedActorActivatedSignalV2;
 685 }
 686
 687 bool KeyboardFocusManager::DoConnectSignal( BaseObject* object, ConnectionTrackerInterface* tracker, const std::string& signalName, FunctorDelegate* functor )
 688 {
 689   Dali::BaseHandle handle( object );
 690
 691   bool connected( true );
 692   KeyboardFocusManager* manager = dynamic_cast<KeyboardFocusManager*>(object);
 693
 694   if( Dali::Toolkit::KeyboardFocusManager::SIGNAL_PRE_FOCUS_CHANGE == signalName )
 695   {
 696     manager->PreFocusChangeSignal().Connect( tracker, functor );
 697   }
 698   if( Dali::Toolkit::KeyboardFocusManager::SIGNAL_FOCUS_CHANGED == signalName )
 699   {
 700     manager->FocusChangedSignal().Connect( tracker, functor );
 701   }
 702   if( Dali::Toolkit::KeyboardFocusManager::SIGNAL_FOCUS_GROUP_CHANGED == signalName )
 703   {
 704     manager->FocusGroupChangedSignal().Connect( tracker, functor );
 705   }
 706   else if( Dali::Toolkit::KeyboardFocusManager::SIGNAL_FOCUSED_ACTOR_ACTIVATED== signalName )
 707   {
 708     manager->FocusedActorActivatedSignal().Connect( tracker, functor );
 709   }
 710   else
 711   {
 712     // signalName does not match any signal
 713     connected = false;
 714   }
 715
 716   return connected;
 717 }
 718
 719 } // namespace Internal
 720
 721 } // namespace Toolkit
 722
 723 } // namespace Dali