dali-toolkit/public-api/controls/control-impl.cpp

   1 /*
   2  * Copyright (c) 2021 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 <dali-toolkit/public-api/controls/control-impl.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/devel-api/actors/actor-devel.h>
  23 #include <dali/devel-api/common/stage.h>
  24 #include <dali/devel-api/scripting/scripting.h>
  25 #include <dali/integration-api/debug.h>
  26 #include <dali/public-api/animation/constraint.h>
  27 #include <dali/public-api/object/type-info.h>
  28 #include <dali/public-api/object/type-registry-helper.h>
  29 #include <dali/public-api/size-negotiation/relayout-container.h>
  30 #include <cstring> // for strcmp
  31 #include <limits>
  32 #include <stack>
  33 #include <typeinfo>
  34
  35 // INTERNAL INCLUDES
  36 #include <dali-toolkit/dali-toolkit.h>
  37 #include <dali-toolkit/devel-api/controls/control-depth-index-ranges.h>
  38 #include <dali-toolkit/devel-api/controls/control-devel.h>
  39 #include <dali-toolkit/devel-api/focus-manager/keyinput-focus-manager.h>
  40 #include <dali-toolkit/devel-api/visuals/color-visual-actions-devel.h>
  41 #include <dali-toolkit/devel-api/visuals/color-visual-properties-devel.h>
  42 #include <dali-toolkit/internal/controls/control/control-data-impl.h>
  43 #include <dali-toolkit/internal/styling/style-manager-impl.h>
  44 #include <dali-toolkit/internal/visuals/color/color-visual.h>
  45 #include <dali-toolkit/internal/visuals/visual-string-constants.h>
  46 #include <dali-toolkit/public-api/align-enumerations.h>
  47 #include <dali-toolkit/public-api/controls/control.h>
  48 #include <dali-toolkit/public-api/controls/image-view/image-view.h>
  49 #include <dali-toolkit/public-api/focus-manager/keyboard-focus-manager.h>
  50 #include <dali-toolkit/public-api/styling/style-manager.h>
  51 #include <dali-toolkit/public-api/visuals/color-visual-properties.h>
  52 #include <dali-toolkit/public-api/visuals/visual-properties.h>
  53
  54 namespace Dali
  55 {
  56 namespace Toolkit
  57 {
  58 namespace Internal
  59 {
  60 namespace
  61 {
  62 #if defined(DEBUG_ENABLED)
  63 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_CONTROL_VISUALS");
  64 #endif
  65
  66 /**
  67  * @brief Replace the background visual if it's a color visual with the renderIfTransparent property set as required.
  68  * @param[in] controlImpl The control implementation
  69  * @param[in] renderIfTransaparent Whether we should render if the color is transparent
  70  */
  71 void ChangeBackgroundColorVisual(Control& controlImpl, bool renderIfTransparent)
  72 {
  73   Internal::Control::Impl& controlDataImpl = Internal::Control::Impl::Get(controlImpl);
  74
  75   Toolkit::Visual::Base backgroundVisual = controlDataImpl.GetVisual(Toolkit::Control::Property::BACKGROUND);
  76   if(backgroundVisual && backgroundVisual.GetType() == Toolkit::Visual::COLOR)
  77   {
  78     Property::Map map;
  79     backgroundVisual.CreatePropertyMap(map);
  80
  81     // Only change it if it's a color visual
  82     map[Toolkit::DevelColorVisual::Property::RENDER_IF_TRANSPARENT] = renderIfTransparent;
  83     controlImpl.SetBackground(map);
  84   }
  85 }
  86
  87 /**
  88  * @brief Creates a clipping renderer if required.
  89  * (EG. If no renders exist and clipping is enabled).
  90  * @param[in] controlImpl The control implementation.
  91  */
  92 void CreateClippingRenderer(Control& controlImpl)
  93 {
  94   // We want to add a transparent background if we do not have one for clipping.
  95   Actor self(controlImpl.Self());
  96   int   clippingMode = ClippingMode::DISABLED;
  97   if(self.GetProperty(Actor::Property::CLIPPING_MODE).Get(clippingMode))
  98   {
  99     switch(clippingMode)
 100     {
 101       case ClippingMode::CLIP_CHILDREN:
 102       {
 103         if(self.GetRendererCount() == 0u)
 104         {
 105           Internal::Control::Impl& controlDataImpl = Internal::Control::Impl::Get(controlImpl);
 106           if(controlDataImpl.mVisuals.Empty())
 107           {
 108             controlImpl.SetBackgroundColor(Color::TRANSPARENT);
 109           }
 110           else
 111           {
 112             // We have visuals, check if we've set the background and re-create it to
 113             // render even if transparent (only if it's a color visual)
 114             ChangeBackgroundColorVisual(controlImpl, true);
 115           }
 116         }
 117         break;
 118       }
 119
 120       case ClippingMode::DISABLED:
 121       case ClippingMode::CLIP_TO_BOUNDING_BOX:
 122       {
 123         // If we have a background visual, check if it's a color visual and remove the render if transparent flag
 124         ChangeBackgroundColorVisual(controlImpl, false);
 125         break;
 126       }
 127     }
 128   }
 129 }
 130
 131 } // unnamed namespace
 132
 133 Toolkit::Control Control::New()
 134 {
 135   // Create the implementation, temporarily owned on stack
 136   IntrusivePtr<Control> controlImpl = new Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT));
 137
 138   // Pass ownership to handle
 139   Toolkit::Control handle(*controlImpl);
 140
 141   // Second-phase init of the implementation
 142   // This can only be done after the CustomActor connection has been made...
 143   controlImpl->Initialize();
 144
 145   return handle;
 146 }
 147
 148 void Control::SetStyleName(const std::string& styleName)
 149 {
 150   if(styleName != mImpl->mStyleName)
 151   {
 152     mImpl->mStyleName = styleName;
 153
 154     // Apply new style, if stylemanager is available
 155     Toolkit::StyleManager styleManager = Toolkit::StyleManager::Get();
 156     if(styleManager)
 157     {
 158       GetImpl(styleManager).ApplyThemeStyle(Toolkit::Control(GetOwner()));
 159     }
 160   }
 161 }
 162
 163 const std::string& Control::GetStyleName() const
 164 {
 165   return mImpl->mStyleName;
 166 }
 167
 168 void Control::SetBackgroundColor(const Vector4& color)
 169 {
 170   mImpl->mBackgroundColor = color;
 171
 172   Property::Map map;
 173   map[Toolkit::Visual::Property::TYPE]           = Toolkit::Visual::COLOR;
 174   map[Toolkit::ColorVisual::Property::MIX_COLOR] = color;
 175
 176   bool renderIfTransparent = false;
 177   int  clippingMode        = ClippingMode::DISABLED;
 178   if((Self().GetProperty(Actor::Property::CLIPPING_MODE).Get(clippingMode)) &&
 179      (clippingMode == ClippingMode::CLIP_CHILDREN))
 180   {
 181     // If clipping-mode is set to CLIP_CHILDREN, then force visual to add the render even if transparent
 182     map[Toolkit::DevelColorVisual::Property::RENDER_IF_TRANSPARENT] = true;
 183     renderIfTransparent                                             = true;
 184   }
 185
 186   Toolkit::Visual::Base visual = mImpl->GetVisual(Toolkit::Control::Property::BACKGROUND);
 187   if(visual && visual.GetType() == Toolkit::Visual::COLOR)
 188   {
 189     Property::Map visualMap;
 190     visual.CreatePropertyMap(visualMap);
 191
 192     Property::Value* renderValue = visualMap.Find(Toolkit::DevelColorVisual::Property::RENDER_IF_TRANSPARENT);
 193     Property::Value* colorValue  = visualMap.Find(Toolkit::ColorVisual::Property::MIX_COLOR);
 194     if(renderValue && colorValue)
 195     {
 196       if((renderValue->Get<bool>() == true || colorValue->Get<Vector4>().a > 0.0f) && (renderIfTransparent || color.a > 0.0f))
 197       {
 198         // Update background color only
 199         mImpl->DoAction(Toolkit::Control::Property::BACKGROUND, DevelColorVisual::Action::UPDATE_PROPERTY, map);
 200         return;
 201       }
 202     }
 203   }
 204
 205   SetBackground(map);
 206 }
 207
 208 void Control::SetBackground(const Property::Map& map)
 209 {
 210   Toolkit::Visual::Base visual = Toolkit::VisualFactory::Get().CreateVisual(map);
 211   visual.SetName("background");
 212   if(visual)
 213   {
 214     mImpl->RegisterVisual(Toolkit::Control::Property::BACKGROUND, visual, DepthIndex::BACKGROUND);
 215
 216     // Trigger a size negotiation request that may be needed by the new visual to relayout its contents.
 217     RelayoutRequest();
 218   }
 219 }
 220
 221 void Control::ClearBackground()
 222 {
 223   mImpl->UnregisterVisual(Toolkit::Control::Property::BACKGROUND);
 224   mImpl->mBackgroundColor = Color::TRANSPARENT;
 225
 226   // Trigger a size negotiation request that may be needed when unregistering a visual.
 227   RelayoutRequest();
 228 }
 229
 230 void Control::EnableGestureDetection(GestureType::Value type)
 231 {
 232   if((type & GestureType::PINCH) && !mImpl->mPinchGestureDetector)
 233   {
 234     mImpl->mPinchGestureDetector = PinchGestureDetector::New();
 235     mImpl->mPinchGestureDetector.DetectedSignal().Connect(mImpl, &Impl::PinchDetected);
 236     mImpl->mPinchGestureDetector.Attach(Self());
 237   }
 238
 239   if((type & GestureType::PAN) && !mImpl->mPanGestureDetector)
 240   {
 241     mImpl->mPanGestureDetector = PanGestureDetector::New();
 242     mImpl->mPanGestureDetector.SetMaximumTouchesRequired(2);
 243     mImpl->mPanGestureDetector.DetectedSignal().Connect(mImpl, &Impl::PanDetected);
 244     mImpl->mPanGestureDetector.Attach(Self());
 245   }
 246
 247   if((type & GestureType::TAP) && !mImpl->mTapGestureDetector)
 248   {
 249     mImpl->mTapGestureDetector = TapGestureDetector::New();
 250     mImpl->mTapGestureDetector.DetectedSignal().Connect(mImpl, &Impl::TapDetected);
 251     mImpl->mTapGestureDetector.Attach(Self());
 252   }
 253
 254   if((type & GestureType::LONG_PRESS) && !mImpl->mLongPressGestureDetector)
 255   {
 256     mImpl->mLongPressGestureDetector = LongPressGestureDetector::New();
 257     mImpl->mLongPressGestureDetector.DetectedSignal().Connect(mImpl, &Impl::LongPressDetected);
 258     mImpl->mLongPressGestureDetector.Attach(Self());
 259   }
 260 }
 261
 262 void Control::DisableGestureDetection(GestureType::Value type)
 263 {
 264   if((type & GestureType::PINCH) && mImpl->mPinchGestureDetector)
 265   {
 266     mImpl->mPinchGestureDetector.Detach(Self());
 267     mImpl->mPinchGestureDetector.Reset();
 268   }
 269
 270   if((type & GestureType::PAN) && mImpl->mPanGestureDetector)
 271   {
 272     mImpl->mPanGestureDetector.Detach(Self());
 273     mImpl->mPanGestureDetector.Reset();
 274   }
 275
 276   if((type & GestureType::TAP) && mImpl->mTapGestureDetector)
 277   {
 278     mImpl->mTapGestureDetector.Detach(Self());
 279     mImpl->mTapGestureDetector.Reset();
 280   }
 281
 282   if((type & GestureType::LONG_PRESS) && mImpl->mLongPressGestureDetector)
 283   {
 284     mImpl->mLongPressGestureDetector.Detach(Self());
 285     mImpl->mLongPressGestureDetector.Reset();
 286   }
 287 }
 288
 289 PinchGestureDetector Control::GetPinchGestureDetector() const
 290 {
 291   return mImpl->mPinchGestureDetector;
 292 }
 293
 294 PanGestureDetector Control::GetPanGestureDetector() const
 295 {
 296   return mImpl->mPanGestureDetector;
 297 }
 298
 299 TapGestureDetector Control::GetTapGestureDetector() const
 300 {
 301   return mImpl->mTapGestureDetector;
 302 }
 303
 304 LongPressGestureDetector Control::GetLongPressGestureDetector() const
 305 {
 306   return mImpl->mLongPressGestureDetector;
 307 }
 308
 309 void Control::SetKeyboardNavigationSupport(bool isSupported)
 310 {
 311   mImpl->mIsKeyboardNavigationSupported = isSupported;
 312 }
 313
 314 bool Control::IsKeyboardNavigationSupported()
 315 {
 316   return mImpl->mIsKeyboardNavigationSupported;
 317 }
 318
 319 void Control::SetKeyInputFocus()
 320 {
 321   if(Self().GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 322   {
 323     Toolkit::KeyInputFocusManager::Get().SetFocus(Toolkit::Control::DownCast(Self()));
 324   }
 325 }
 326
 327 bool Control::HasKeyInputFocus()
 328 {
 329   bool result = false;
 330   if(Self().GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 331   {
 332     Toolkit::Control control = Toolkit::KeyInputFocusManager::Get().GetCurrentFocusControl();
 333     if(Self() == control)
 334     {
 335       result = true;
 336     }
 337   }
 338   return result;
 339 }
 340
 341 void Control::ClearKeyInputFocus()
 342 {
 343   if(Self().GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 344   {
 345     Toolkit::KeyInputFocusManager::Get().RemoveFocus(Toolkit::Control::DownCast(Self()));
 346   }
 347 }
 348
 349 void Control::SetAsKeyboardFocusGroup(bool isFocusGroup)
 350 {
 351   mImpl->mIsKeyboardFocusGroup = isFocusGroup;
 352
 353   // The following line will be removed when the deprecated API in KeyboardFocusManager is deleted
 354   Toolkit::KeyboardFocusManager::Get().SetAsFocusGroup(Self(), isFocusGroup);
 355 }
 356
 357 bool Control::IsKeyboardFocusGroup()
 358 {
 359   return Toolkit::KeyboardFocusManager::Get().IsFocusGroup(Self());
 360 }
 361
 362 void Control::AccessibilityActivate()
 363 {
 364   // Inform deriving classes
 365   OnAccessibilityActivated();
 366 }
 367
 368 void Control::KeyboardEnter()
 369 {
 370   // Inform deriving classes
 371   OnKeyboardEnter();
 372 }
 373
 374 bool Control::OnAccessibilityActivated()
 375 {
 376   if(Toolkit::KeyboardFocusManager::Get().SetCurrentFocusActor(Self()))
 377   {
 378     return OnKeyboardEnter();
 379   }
 380   return false;
 381 }
 382
 383 bool Control::OnKeyboardEnter()
 384 {
 385   return false; // Keyboard enter is not handled by default
 386 }
 387
 388 bool Control::OnAccessibilityPan(PanGesture gesture)
 389 {
 390   return false; // Accessibility pan gesture is not handled by default
 391 }
 392
 393 bool Control::OnAccessibilityValueChange(bool isIncrease)
 394 {
 395   return false; // Accessibility value change action is not handled by default
 396 }
 397
 398 bool Control::OnAccessibilityZoom()
 399 {
 400   return false; // Accessibility zoom action is not handled by default
 401 }
 402
 403 Actor Control::GetNextKeyboardFocusableActor(Actor currentFocusedActor, Toolkit::Control::KeyboardFocus::Direction direction, bool loopEnabled)
 404 {
 405   return Actor();
 406 }
 407
 408 void Control::OnKeyboardFocusChangeCommitted(Actor commitedFocusableActor)
 409 {
 410 }
 411
 412 Toolkit::Control::KeyEventSignalType& Control::KeyEventSignal()
 413 {
 414   return mImpl->mKeyEventSignal;
 415 }
 416
 417 Toolkit::Control::KeyInputFocusSignalType& Control::KeyInputFocusGainedSignal()
 418 {
 419   return mImpl->mKeyInputFocusGainedSignal;
 420 }
 421
 422 Toolkit::Control::KeyInputFocusSignalType& Control::KeyInputFocusLostSignal()
 423 {
 424   return mImpl->mKeyInputFocusLostSignal;
 425 }
 426
 427 bool Control::EmitKeyEventSignal(const KeyEvent& event)
 428 {
 429   // Guard against destruction during signal emission
 430   Dali::Toolkit::Control handle(GetOwner());
 431
 432   bool consumed = false;
 433
 434   consumed = mImpl->FilterKeyEvent(event);
 435
 436   // signals are allocated dynamically when someone connects
 437   if(!consumed && !mImpl->mKeyEventSignal.Empty())
 438   {
 439     consumed = mImpl->mKeyEventSignal.Emit(handle, event);
 440   }
 441
 442   if(!consumed)
 443   {
 444     // Notification for derived classes
 445     consumed = OnKeyEvent(event);
 446   }
 447
 448   return consumed;
 449 }
 450
 451 Control::Control(ControlBehaviour behaviourFlags)
 452 : CustomActorImpl(static_cast<ActorFlags>(behaviourFlags)),
 453   mImpl(new Impl(*this))
 454 {
 455   mImpl->mFlags = behaviourFlags;
 456 }
 457
 458 Control::~Control()
 459 {
 460   delete mImpl;
 461 }
 462
 463 void Control::Initialize()
 464 {
 465   // Call deriving classes so initialised before styling is applied to them.
 466   OnInitialize();
 467
 468   if(!(mImpl->mFlags & DISABLE_STYLE_CHANGE_SIGNALS))
 469   {
 470     Toolkit::StyleManager styleManager = StyleManager::Get();
 471
 472     // if stylemanager is available
 473     if(styleManager)
 474     {
 475       StyleManager& styleManagerImpl = GetImpl(styleManager);
 476
 477       // Register for style changes
 478       styleManagerImpl.ControlStyleChangeSignal().Connect(this, &Control::OnStyleChange);
 479
 480       // Apply the current style
 481       styleManagerImpl.ApplyThemeStyleAtInit(Toolkit::Control(GetOwner()));
 482     }
 483   }
 484
 485   if(mImpl->mFlags & REQUIRES_KEYBOARD_NAVIGATION_SUPPORT)
 486   {
 487     SetKeyboardNavigationSupport(true);
 488   }
 489
 490   Dali::TypeInfo type;
 491   Self().GetTypeInfo(type);
 492   if(type)
 493   {
 494     auto typeName = type.GetName();
 495     DevelControl::AppendAccessibilityAttribute(Self(), "class", typeName);
 496   }
 497 }
 498
 499 void Control::OnInitialize()
 500 {
 501 }
 502
 503 void Control::OnStyleChange(Toolkit::StyleManager styleManager, StyleChange::Type change)
 504 {
 505   // By default the control is only interested in theme (not font) changes
 506   if(styleManager && change == StyleChange::THEME_CHANGE)
 507   {
 508     GetImpl(styleManager).ApplyThemeStyle(Toolkit::Control(GetOwner()));
 509     RelayoutRequest();
 510   }
 511 }
 512
 513 void Control::OnPinch(const PinchGesture& pinch)
 514 {
 515   if(!(mImpl->mStartingPinchScale))
 516   {
 517     // lazy allocate
 518     mImpl->mStartingPinchScale = new Vector3;
 519   }
 520
 521   if(pinch.GetState() == GestureState::STARTED)
 522   {
 523     *(mImpl->mStartingPinchScale) = Self().GetCurrentProperty<Vector3>(Actor::Property::SCALE);
 524   }
 525
 526   Self().SetProperty(Actor::Property::SCALE, *(mImpl->mStartingPinchScale) * pinch.GetScale());
 527 }
 528
 529 void Control::OnPan(const PanGesture& pan)
 530 {
 531 }
 532
 533 void Control::OnTap(const TapGesture& tap)
 534 {
 535 }
 536
 537 void Control::OnLongPress(const LongPressGesture& longPress)
 538 {
 539 }
 540
 541 void Control::EmitKeyInputFocusSignal(bool focusGained)
 542 {
 543   Dali::Toolkit::Control handle(GetOwner());
 544
 545   if(Accessibility::IsUp())
 546   {
 547     auto self = mImpl->GetAccessibilityObject(Self());
 548     self->EmitFocused(focusGained);
 549     auto parent = self->GetParent();
 550     if(parent && !self->GetStates()[Dali::Accessibility::State::MANAGES_DESCENDANTS])
 551     {
 552       parent->EmitActiveDescendantChanged(parent, self);
 553     }
 554   }
 555
 556   if(focusGained)
 557   {
 558     // signals are allocated dynamically when someone connects
 559     if(!mImpl->mKeyInputFocusGainedSignal.Empty())
 560     {
 561       mImpl->mKeyInputFocusGainedSignal.Emit(handle);
 562     }
 563   }
 564   else
 565   {
 566     // signals are allocated dynamically when someone connects
 567     if(!mImpl->mKeyInputFocusLostSignal.Empty())
 568     {
 569       mImpl->mKeyInputFocusLostSignal.Emit(handle);
 570     }
 571   }
 572 }
 573
 574 void Control::OnSceneConnection(int depth)
 575 {
 576   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Control::OnSceneConnection number of registered visuals(%d)\n", mImpl->mVisuals.Size());
 577
 578   Actor self(Self());
 579
 580   for(RegisteredVisualContainer::Iterator iter = mImpl->mVisuals.Begin(); iter != mImpl->mVisuals.End(); iter++)
 581   {
 582     // Check whether the visual is empty and enabled
 583     if((*iter)->visual && (*iter)->enabled)
 584     {
 585       DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Control::OnSceneConnection Setting visual(%d) on scene\n", (*iter)->index);
 586       Toolkit::GetImplementation((*iter)->visual).SetOnScene(self);
 587     }
 588   }
 589
 590   // The clipping renderer is only created if required.
 591   CreateClippingRenderer(*this);
 592
 593   mImpl->AccessibilityRegister();
 594 }
 595
 596 void Control::OnSceneDisconnection()
 597 {
 598   mImpl->AccessibilityDeregister(true);
 599   mImpl->OnSceneDisconnection();
 600 }
 601
 602 void Control::OnKeyInputFocusGained()
 603 {
 604   EmitKeyInputFocusSignal(true);
 605 }
 606
 607 void Control::OnKeyInputFocusLost()
 608 {
 609   EmitKeyInputFocusSignal(false);
 610 }
 611
 612 void Control::OnChildAdd(Actor& child)
 613 {
 614 }
 615
 616 void Control::OnChildRemove(Actor& child)
 617 {
 618 }
 619
 620 void Control::OnPropertySet(Property::Index index, const Property::Value& propertyValue)
 621 {
 622   // If the clipping mode has been set, we may need to create a renderer.
 623   // Only do this if we are already on-stage as the OnSceneConnection will handle the off-stage clipping controls.
 624   switch(index)
 625   {
 626     case Actor::Property::CLIPPING_MODE:
 627     {
 628       if(Self().GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 629       {
 630         // Note: This method will handle whether creation of the renderer is required.
 631         CreateClippingRenderer(*this);
 632       }
 633       break;
 634     }
 635     case Actor::Property::VISIBLE:
 636     {
 637       if(Dali::Accessibility::IsUp())
 638       {
 639         Dali::Accessibility::Accessible::Get(Self())->EmitVisible(Self().GetProperty(Actor::Property::VISIBLE).Get<bool>());
 640       }
 641       break;
 642     }
 643     case Toolkit::DevelControl::Property::ACCESSIBILITY_ROLE:
 644     {
 645       if(Dali::Accessibility::IsUp())
 646       {
 647         Dali::Accessibility::Accessible::Get(Self())->Emit(Dali::Accessibility::ObjectPropertyChangeEvent::ROLE);
 648       }
 649       break;
 650     }
 651   }
 652 }
 653
 654 void Control::OnSizeSet(const Vector3& targetSize)
 655 {
 656   Toolkit::Visual::Base visual = mImpl->GetVisual(Toolkit::Control::Property::BACKGROUND);
 657   if(visual)
 658   {
 659     Vector2 size(targetSize);
 660     visual.SetTransformAndSize(Property::Map(), size); // Send an empty map as we do not want to modify the visual's set transform
 661   }
 662 }
 663
 664 void Control::OnSizeAnimation(Animation& animation, const Vector3& targetSize)
 665 {
 666   // @todo size negotiate background to new size, animate as well?
 667 }
 668
 669 bool Control::OnKeyEvent(const KeyEvent& event)
 670 {
 671   return false; // Do not consume
 672 }
 673
 674 void Control::OnRelayout(const Vector2& size, RelayoutContainer& container)
 675 {
 676   for(unsigned int i = 0, numChildren = Self().GetChildCount(); i < numChildren; ++i)
 677   {
 678     Actor   child = Self().GetChildAt(i);
 679     Vector2 newChildSize(size);
 680
 681     // When set the padding or margin on the control, child should be resized and repositioned.
 682     if((mImpl->mPadding.start != 0) || (mImpl->mPadding.end != 0) || (mImpl->mPadding.top != 0) || (mImpl->mPadding.bottom != 0) ||
 683        (mImpl->mMargin.start != 0) || (mImpl->mMargin.end != 0) || (mImpl->mMargin.top != 0) || (mImpl->mMargin.bottom != 0))
 684     {
 685       Extents padding = mImpl->mPadding;
 686
 687       Dali::CustomActor           ownerActor(GetOwner());
 688       Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>(ownerActor.GetProperty(Dali::Actor::Property::LAYOUT_DIRECTION).Get<int>());
 689
 690       if(Dali::LayoutDirection::RIGHT_TO_LEFT == layoutDirection)
 691       {
 692         std::swap(padding.start, padding.end);
 693       }
 694
 695       newChildSize.width  = size.width - (padding.start + padding.end);
 696       newChildSize.height = size.height - (padding.top + padding.bottom);
 697
 698       // Cannot use childs Position property as it can already have padding and margin applied on it,
 699       // so we end up cumulatively applying them over and over again.
 700       Vector2 childOffset(0.f, 0.f);
 701       childOffset.x += (mImpl->mMargin.start + padding.start);
 702       childOffset.y += (mImpl->mMargin.top + padding.top);
 703
 704       child.SetProperty(Actor::Property::POSITION, Vector2(childOffset.x, childOffset.y));
 705     }
 706     container.Add(child, newChildSize);
 707   }
 708
 709   Toolkit::Visual::Base visual = mImpl->GetVisual(Toolkit::Control::Property::BACKGROUND);
 710   if(visual)
 711   {
 712     visual.SetTransformAndSize(Property::Map(), size); // Send an empty map as we do not want to modify the visual's set transform
 713   }
 714 }
 715
 716 void Control::OnSetResizePolicy(ResizePolicy::Type policy, Dimension::Type dimension)
 717 {
 718 }
 719
 720 Vector3 Control::GetNaturalSize()
 721 {
 722   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Control::GetNaturalSize for %s\n", Self().GetProperty<std::string>(Dali::Actor::Property::NAME).c_str());
 723   Toolkit::Visual::Base visual = mImpl->GetVisual(Toolkit::Control::Property::BACKGROUND);
 724   if(visual)
 725   {
 726     Vector2 naturalSize;
 727     visual.GetNaturalSize(naturalSize);
 728     naturalSize.width += (mImpl->mPadding.start + mImpl->mPadding.end);
 729     naturalSize.height += (mImpl->mPadding.top + mImpl->mPadding.bottom);
 730     return Vector3(naturalSize);
 731   }
 732   return Vector3::ZERO;
 733 }
 734
 735 float Control::CalculateChildSize(const Dali::Actor& child, Dimension::Type dimension)
 736 {
 737   return CalculateChildSizeBase(child, dimension);
 738 }
 739
 740 float Control::GetHeightForWidth(float width)
 741 {
 742   return GetHeightForWidthBase(width);
 743 }
 744
 745 float Control::GetWidthForHeight(float height)
 746 {
 747   return GetWidthForHeightBase(height);
 748 }
 749
 750 bool Control::RelayoutDependentOnChildren(Dimension::Type dimension)
 751 {
 752   return RelayoutDependentOnChildrenBase(dimension);
 753 }
 754
 755 void Control::OnCalculateRelayoutSize(Dimension::Type dimension)
 756 {
 757 }
 758
 759 void Control::OnLayoutNegotiated(float size, Dimension::Type dimension)
 760 {
 761 }
 762
 763 void Control::SignalConnected(SlotObserver* slotObserver, CallbackBase* callback)
 764 {
 765   mImpl->SignalConnected(slotObserver, callback);
 766 }
 767
 768 void Control::SignalDisconnected(SlotObserver* slotObserver, CallbackBase* callback)
 769 {
 770   mImpl->SignalDisconnected(slotObserver, callback);
 771 }
 772
 773 Control& GetImplementation(Dali::Toolkit::Control& handle)
 774 {
 775   CustomActorImpl& customInterface = handle.GetImplementation();
 776   // downcast to control
 777   Control& impl = dynamic_cast<Internal::Control&>(customInterface);
 778   return impl;
 779 }
 780
 781 const Control& GetImplementation(const Dali::Toolkit::Control& handle)
 782 {
 783   const CustomActorImpl& customInterface = handle.GetImplementation();
 784   // downcast to control
 785   const Control& impl = dynamic_cast<const Internal::Control&>(customInterface);
 786   return impl;
 787 }
 788
 789 } // namespace Internal
 790
 791 } // namespace Toolkit
 792
 793 } // namespace Dali