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

   1 /*
   2  * Copyright (c) 2024 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/math/math-utils.h>
  28 #include <dali/public-api/size-negotiation/relayout-container.h>
  29 #include <cstring> // for strcmp
  30 #include <limits>
  31 #include <stack>
  32
  33 // INTERNAL INCLUDES
  34 #include <dali-toolkit/dali-toolkit.h>
  35 #include <dali-toolkit/devel-api/controls/control-depth-index-ranges.h>
  36 #include <dali-toolkit/devel-api/controls/control-devel.h>
  37 #include <dali-toolkit/devel-api/focus-manager/keyinput-focus-manager.h>
  38 #include <dali-toolkit/devel-api/visuals/color-visual-properties-devel.h>
  39 #include <dali-toolkit/devel-api/visuals/visual-actions-devel.h>
  40 #include <dali-toolkit/internal/controls/control/control-data-impl.h>
  41 #include <dali-toolkit/internal/styling/style-manager-impl.h>
  42 #include <dali-toolkit/internal/visuals/color/color-visual.h>
  43 #include <dali-toolkit/internal/visuals/visual-string-constants.h>
  44 #include <dali-toolkit/public-api/align-enumerations.h>
  45 #include <dali-toolkit/public-api/controls/control.h>
  46 #include <dali-toolkit/public-api/controls/image-view/image-view.h>
  47 #include <dali-toolkit/public-api/focus-manager/keyboard-focus-manager.h>
  48 #include <dali-toolkit/public-api/styling/style-manager.h>
  49 #include <dali-toolkit/public-api/visuals/color-visual-properties.h>
  50 #include <dali-toolkit/public-api/visuals/visual-properties.h>
  51
  52 namespace Dali
  53 {
  54 namespace Toolkit
  55 {
  56 namespace Internal
  57 {
  58 namespace
  59 {
  60 #if defined(DEBUG_ENABLED)
  61 Debug::Filter* gLogFilter = Debug::Filter::New(Debug::NoLogging, false, "LOG_CONTROL_VISUALS");
  62 #endif
  63
  64 /**
  65  * @brief Creates a clipping renderer if required.
  66  * (EG. If no renders exist and clipping is enabled).
  67  * @param[in] controlImpl The control implementation.
  68  */
  69 void CreateClippingRenderer(Control& controlImpl)
  70 {
  71   // We want to add a transparent background if we do not have one for clipping.
  72   Actor self(controlImpl.Self());
  73   int   clippingMode = ClippingMode::DISABLED;
  74   if(self.GetProperty(Actor::Property::CLIPPING_MODE).Get(clippingMode))
  75   {
  76     Internal::Control::Impl& controlDataImpl = Internal::Control::Impl::Get(controlImpl);
  77
  78     if(clippingMode == ClippingMode::CLIP_CHILDREN && controlDataImpl.mVisuals.Empty() && self.GetRendererCount() == 0u)
  79     {
  80       controlImpl.SetBackgroundColor(Color::TRANSPARENT);
  81     }
  82   }
  83 }
  84
  85 } // unnamed namespace
  86
  87 Toolkit::Control Control::New()
  88 {
  89   return New(ControlBehaviour::CONTROL_BEHAVIOUR_DEFAULT);
  90 }
  91
  92 Toolkit::Control Control::New(ControlBehaviour additionalBehaviour)
  93 {
  94   // Create the implementation, temporarily owned on stack
  95   IntrusivePtr<Control> controlImpl = new Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT | additionalBehaviour));
  96
  97   // Pass ownership to handle
  98   Toolkit::Control handle(*controlImpl);
  99
 100   // Second-phase init of the implementation
 101   // This can only be done after the CustomActor connection has been made...
 102   controlImpl->Initialize();
 103
 104   return handle;
 105 }
 106
 107 void Control::SetStyleName(const std::string& styleName)
 108 {
 109   if(styleName != mImpl->mStyleName)
 110   {
 111     mImpl->mStyleName = styleName;
 112
 113     // Apply new style, if stylemanager is available
 114     Toolkit::StyleManager styleManager = Toolkit::StyleManager::Get();
 115     if(styleManager)
 116     {
 117       GetImpl(styleManager).ApplyThemeStyle(Toolkit::Control(GetOwner()));
 118     }
 119   }
 120 }
 121
 122 const std::string& Control::GetStyleName() const
 123 {
 124   return mImpl->mStyleName;
 125 }
 126
 127 void Control::SetBackgroundColor(const Vector4& color)
 128 {
 129   mImpl->mBackgroundColor = color;
 130
 131   Property::Map map;
 132   map[Toolkit::Visual::Property::TYPE]           = Toolkit::Visual::COLOR;
 133   map[Toolkit::ColorVisual::Property::MIX_COLOR] = color;
 134
 135   Toolkit::Visual::Base visual = mImpl->GetVisual(Toolkit::Control::Property::BACKGROUND);
 136   if(visual && visual.GetType() == Toolkit::Visual::COLOR)
 137   {
 138     // Update background color only
 139     mImpl->DoAction(Toolkit::Control::Property::BACKGROUND, DevelVisual::Action::UPDATE_PROPERTY, map);
 140     return;
 141   }
 142
 143   SetBackground(map);
 144 }
 145
 146 void Control::SetBackground(const Property::Map& map)
 147 {
 148   Toolkit::Visual::Base visual = Toolkit::VisualFactory::Get().CreateVisual(map);
 149   visual.SetName("background");
 150   if(visual)
 151   {
 152     mImpl->RegisterVisual(Toolkit::Control::Property::BACKGROUND, visual, DepthIndex::BACKGROUND);
 153
 154     // Trigger a size negotiation request that may be needed by the new visual to relayout its contents.
 155     RelayoutRequest();
 156   }
 157 }
 158
 159 void Control::ClearBackground()
 160 {
 161   mImpl->UnregisterVisual(Toolkit::Control::Property::BACKGROUND);
 162   mImpl->mBackgroundColor = Color::TRANSPARENT;
 163
 164   // Trigger a size negotiation request that may be needed when unregistering a visual.
 165   RelayoutRequest();
 166 }
 167
 168 void Control::SetResourceReady()
 169 {
 170   Internal::Control::Impl& controlDataImpl = Internal::Control::Impl::Get(*this);
 171   controlDataImpl.ResourceReady();
 172 }
 173
 174 Toolkit::DevelControl::ControlAccessible* Control::GetAccessibleObject()
 175 {
 176   return mImpl->GetAccessibleObject();
 177 }
 178
 179 void Control::EnableGestureDetection(GestureType::Value type)
 180 {
 181   if((type & GestureType::PINCH) && !mImpl->mPinchGestureDetector)
 182   {
 183     mImpl->mPinchGestureDetector = PinchGestureDetector::New();
 184     mImpl->mPinchGestureDetector.DetectedSignal().Connect(mImpl, &Impl::PinchDetected);
 185     mImpl->mPinchGestureDetector.Attach(Self());
 186   }
 187
 188   if((type & GestureType::PAN) && !mImpl->mPanGestureDetector)
 189   {
 190     mImpl->mPanGestureDetector = PanGestureDetector::New();
 191     mImpl->mPanGestureDetector.SetMaximumTouchesRequired(2);
 192     mImpl->mPanGestureDetector.DetectedSignal().Connect(mImpl, &Impl::PanDetected);
 193     mImpl->mPanGestureDetector.Attach(Self());
 194   }
 195
 196   if((type & GestureType::TAP) && !mImpl->mTapGestureDetector)
 197   {
 198     mImpl->mTapGestureDetector = TapGestureDetector::New();
 199     mImpl->mTapGestureDetector.DetectedSignal().Connect(mImpl, &Impl::TapDetected);
 200     mImpl->mTapGestureDetector.Attach(Self());
 201   }
 202
 203   if((type & GestureType::LONG_PRESS) && !mImpl->mLongPressGestureDetector)
 204   {
 205     mImpl->mLongPressGestureDetector = LongPressGestureDetector::New();
 206     mImpl->mLongPressGestureDetector.DetectedSignal().Connect(mImpl, &Impl::LongPressDetected);
 207     mImpl->mLongPressGestureDetector.Attach(Self());
 208   }
 209 }
 210
 211 void Control::DisableGestureDetection(GestureType::Value type)
 212 {
 213   if((type & GestureType::PINCH) && mImpl->mPinchGestureDetector)
 214   {
 215     mImpl->mPinchGestureDetector.Detach(Self());
 216     mImpl->mPinchGestureDetector.Reset();
 217   }
 218
 219   if((type & GestureType::PAN) && mImpl->mPanGestureDetector)
 220   {
 221     mImpl->mPanGestureDetector.Detach(Self());
 222     mImpl->mPanGestureDetector.Reset();
 223   }
 224
 225   if((type & GestureType::TAP) && mImpl->mTapGestureDetector)
 226   {
 227     mImpl->mTapGestureDetector.Detach(Self());
 228     mImpl->mTapGestureDetector.Reset();
 229   }
 230
 231   if((type & GestureType::LONG_PRESS) && mImpl->mLongPressGestureDetector)
 232   {
 233     mImpl->mLongPressGestureDetector.Detach(Self());
 234     mImpl->mLongPressGestureDetector.Reset();
 235   }
 236 }
 237
 238 PinchGestureDetector Control::GetPinchGestureDetector() const
 239 {
 240   return mImpl->mPinchGestureDetector;
 241 }
 242
 243 PanGestureDetector Control::GetPanGestureDetector() const
 244 {
 245   return mImpl->mPanGestureDetector;
 246 }
 247
 248 TapGestureDetector Control::GetTapGestureDetector() const
 249 {
 250   return mImpl->mTapGestureDetector;
 251 }
 252
 253 LongPressGestureDetector Control::GetLongPressGestureDetector() const
 254 {
 255   return mImpl->mLongPressGestureDetector;
 256 }
 257
 258 void Control::SetKeyboardNavigationSupport(bool isSupported)
 259 {
 260   mImpl->mIsKeyboardNavigationSupported = isSupported;
 261 }
 262
 263 bool Control::IsKeyboardNavigationSupported()
 264 {
 265   return mImpl->mIsKeyboardNavigationSupported;
 266 }
 267
 268 void Control::SetKeyInputFocus()
 269 {
 270   if(Self().GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 271   {
 272     Toolkit::KeyInputFocusManager::Get().SetFocus(Toolkit::Control::DownCast(Self()));
 273   }
 274 }
 275
 276 bool Control::HasKeyInputFocus()
 277 {
 278   bool result = false;
 279   if(Self().GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 280   {
 281     Toolkit::Control control = Toolkit::KeyInputFocusManager::Get().GetCurrentFocusControl();
 282     if(Self() == control)
 283     {
 284       result = true;
 285     }
 286   }
 287   return result;
 288 }
 289
 290 void Control::ClearKeyInputFocus()
 291 {
 292   if(Self().GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 293   {
 294     Toolkit::KeyInputFocusManager::Get().RemoveFocus(Toolkit::Control::DownCast(Self()));
 295   }
 296 }
 297
 298 void Control::SetAsKeyboardFocusGroup(bool isFocusGroup)
 299 {
 300   mImpl->mIsKeyboardFocusGroup = isFocusGroup;
 301
 302   // The following line will be removed when the deprecated API in KeyboardFocusManager is deleted
 303   Toolkit::KeyboardFocusManager::Get().SetAsFocusGroup(Self(), isFocusGroup);
 304 }
 305
 306 bool Control::IsKeyboardFocusGroup()
 307 {
 308   return Toolkit::KeyboardFocusManager::Get().IsFocusGroup(Self());
 309 }
 310
 311 void Control::KeyboardEnter()
 312 {
 313   // Inform deriving classes
 314   OnKeyboardEnter();
 315 }
 316
 317 bool Control::OnAccessibilityActivated()
 318 {
 319   if(Toolkit::KeyboardFocusManager::Get().SetCurrentFocusActor(Self()))
 320   {
 321     return OnKeyboardEnter();
 322   }
 323   return false;
 324 }
 325
 326 bool Control::OnKeyboardEnter()
 327 {
 328   return false; // Keyboard enter is not handled by default
 329 }
 330
 331 bool Control::OnAccessibilityPan(PanGesture gesture)
 332 {
 333   return false; // Accessibility pan gesture is not handled by default
 334 }
 335
 336 bool Control::OnAccessibilityValueChange(bool isIncrease)
 337 {
 338   return false; // Accessibility value change action is not handled by default
 339 }
 340
 341 bool Control::OnAccessibilityZoom()
 342 {
 343   return false; // Accessibility zoom action is not handled by default
 344 }
 345
 346 DevelControl::ControlAccessible* Control::CreateAccessibleObject()
 347 {
 348   return new DevelControl::ControlAccessible(Self());
 349 }
 350
 351 Actor Control::GetNextKeyboardFocusableActor(Actor currentFocusedActor, Toolkit::Control::KeyboardFocus::Direction direction, bool loopEnabled)
 352 {
 353   return Actor();
 354 }
 355
 356 void Control::OnKeyboardFocusChangeCommitted(Actor commitedFocusableActor)
 357 {
 358 }
 359
 360 Toolkit::Control::KeyEventSignalType& Control::KeyEventSignal()
 361 {
 362   return mImpl->mKeyEventSignal;
 363 }
 364
 365 Toolkit::Control::KeyInputFocusSignalType& Control::KeyInputFocusGainedSignal()
 366 {
 367   return mImpl->mKeyInputFocusGainedSignal;
 368 }
 369
 370 Toolkit::Control::KeyInputFocusSignalType& Control::KeyInputFocusLostSignal()
 371 {
 372   return mImpl->mKeyInputFocusLostSignal;
 373 }
 374
 375 bool Control::EmitKeyEventSignal(const KeyEvent& event)
 376 {
 377   // Guard against destruction during signal emission
 378   Dali::Toolkit::Control handle(GetOwner());
 379
 380   bool consumed = false;
 381
 382   consumed = mImpl->FilterKeyEvent(event);
 383
 384   // signals are allocated dynamically when someone connects
 385   if(!consumed && !mImpl->mKeyEventSignal.Empty())
 386   {
 387     consumed = mImpl->mKeyEventSignal.Emit(handle, event);
 388   }
 389
 390   if(!consumed)
 391   {
 392     // Notification for derived classes
 393     consumed = OnKeyEvent(event);
 394   }
 395
 396   return consumed;
 397 }
 398
 399 Control::Control(ControlBehaviour behaviourFlags)
 400 : CustomActorImpl(static_cast<ActorFlags>(behaviourFlags)),
 401   mImpl(new Impl(*this))
 402 {
 403   mImpl->mFlags = behaviourFlags;
 404 }
 405
 406 Control::~Control()
 407 {
 408   delete mImpl;
 409 }
 410
 411 void Control::Initialize()
 412 {
 413   // Call deriving classes so initialised before styling is applied to them.
 414   OnInitialize();
 415
 416   if(!(mImpl->mFlags & DISABLE_STYLE_CHANGE_SIGNALS))
 417   {
 418     Toolkit::StyleManager styleManager = StyleManager::Get();
 419
 420     // if stylemanager is available
 421     if(styleManager)
 422     {
 423       StyleManager& styleManagerImpl = GetImpl(styleManager);
 424
 425       // Register for style changes
 426       styleManagerImpl.ControlStyleChangeSignal().Connect(this, &Control::OnStyleChange);
 427
 428       // Apply the current style
 429       styleManagerImpl.ApplyThemeStyleAtInit(Toolkit::Control(GetOwner()));
 430     }
 431   }
 432
 433   if(mImpl->mFlags & REQUIRES_KEYBOARD_NAVIGATION_SUPPORT)
 434   {
 435     SetKeyboardNavigationSupport(true);
 436   }
 437 }
 438
 439 void Control::OnInitialize()
 440 {
 441 }
 442
 443 bool Control::IsResourceReady() const
 444 {
 445   const Internal::Control::Impl& controlDataImpl = Internal::Control::Impl::Get(*this);
 446   return controlDataImpl.IsResourceReady();
 447 }
 448
 449 void Control::OnStyleChange(Toolkit::StyleManager styleManager, StyleChange::Type change)
 450 {
 451   // By default the control is only interested in theme (not font) changes
 452   if(styleManager && change == StyleChange::THEME_CHANGE)
 453   {
 454     GetImpl(styleManager).ApplyThemeStyle(Toolkit::Control(GetOwner()));
 455     RelayoutRequest();
 456   }
 457 }
 458
 459 void Control::OnPinch(const PinchGesture& pinch)
 460 {
 461   if(!(mImpl->mStartingPinchScale))
 462   {
 463     // lazy allocate
 464     mImpl->mStartingPinchScale = new Vector3;
 465   }
 466
 467   if(pinch.GetState() == GestureState::STARTED)
 468   {
 469     *(mImpl->mStartingPinchScale) = Self().GetCurrentProperty<Vector3>(Actor::Property::SCALE);
 470   }
 471
 472   Self().SetProperty(Actor::Property::SCALE, *(mImpl->mStartingPinchScale) * pinch.GetScale());
 473 }
 474
 475 void Control::OnPan(const PanGesture& pan)
 476 {
 477 }
 478
 479 void Control::OnTap(const TapGesture& tap)
 480 {
 481 }
 482
 483 void Control::OnLongPress(const LongPressGesture& longPress)
 484 {
 485 }
 486
 487 void Control::EmitKeyInputFocusSignal(bool focusGained)
 488 {
 489   Dali::Toolkit::Control handle(GetOwner());
 490
 491   if(Accessibility::IsUp())
 492   {
 493     auto accessible = GetAccessibleObject();
 494     if(DALI_LIKELY(accessible))
 495     {
 496       accessible->EmitFocused(focusGained);
 497       auto parent = accessible->GetParent();
 498       if(parent && !accessible->GetStates()[Dali::Accessibility::State::MANAGES_DESCENDANTS])
 499       {
 500         parent->EmitActiveDescendantChanged(accessible);
 501       }
 502     }
 503   }
 504
 505   if(focusGained)
 506   {
 507     // signals are allocated dynamically when someone connects
 508     if(!mImpl->mKeyInputFocusGainedSignal.Empty())
 509     {
 510       mImpl->mKeyInputFocusGainedSignal.Emit(handle);
 511     }
 512   }
 513   else
 514   {
 515     // signals are allocated dynamically when someone connects
 516     if(!mImpl->mKeyInputFocusLostSignal.Empty())
 517     {
 518       mImpl->mKeyInputFocusLostSignal.Emit(handle);
 519     }
 520   }
 521 }
 522
 523 void Control::OnSceneConnection(int depth)
 524 {
 525   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Control::OnSceneConnection number of registered visuals(%d)\n", mImpl->mVisuals.Size());
 526
 527   Actor self(Self());
 528
 529   for(RegisteredVisualContainer::Iterator iter = mImpl->mVisuals.Begin(); iter != mImpl->mVisuals.End(); iter++)
 530   {
 531     // Check whether the visual is empty and enabled
 532     if((*iter)->visual && (*iter)->enabled)
 533     {
 534       DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Control::OnSceneConnection Setting visual(%d) on scene\n", (*iter)->index);
 535       Toolkit::GetImplementation((*iter)->visual).SetOnScene(self);
 536     }
 537   }
 538
 539   // The clipping renderer is only created if required.
 540   CreateClippingRenderer(*this);
 541 }
 542
 543 void Control::OnSceneDisconnection()
 544 {
 545   mImpl->OnSceneDisconnection();
 546 }
 547
 548 void Control::OnKeyInputFocusGained()
 549 {
 550   EmitKeyInputFocusSignal(true);
 551 }
 552
 553 void Control::OnKeyInputFocusLost()
 554 {
 555   EmitKeyInputFocusSignal(false);
 556 }
 557
 558 void Control::OnChildAdd(Actor& child)
 559 {
 560 }
 561
 562 void Control::OnChildRemove(Actor& child)
 563 {
 564 }
 565
 566 void Control::OnPropertySet(Property::Index index, const Property::Value& propertyValue)
 567 {
 568   // If the clipping mode has been set, we may need to create a renderer.
 569   // Only do this if we are already on-stage as the OnSceneConnection will handle the off-stage clipping controls.
 570   switch(index)
 571   {
 572     case Actor::Property::CLIPPING_MODE:
 573     {
 574       if(Self().GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 575       {
 576         // Note: This method will handle whether creation of the renderer is required.
 577         CreateClippingRenderer(*this);
 578       }
 579       break;
 580     }
 581     case Actor::Property::VISIBLE:
 582     {
 583       auto* accessible = GetAccessibleObject();
 584       if(DALI_LIKELY(accessible))
 585       {
 586         accessible->EmitVisible(Self().GetProperty<bool>(Actor::Property::VISIBLE));
 587       }
 588       break;
 589     }
 590     case DevelActor::Property::USER_INTERACTION_ENABLED:
 591     {
 592       const bool enabled = propertyValue.Get<bool>();
 593       if(!enabled && Self() == Dali::Toolkit::KeyboardFocusManager::Get().GetCurrentFocusActor())
 594       {
 595         Dali::Toolkit::KeyboardFocusManager::Get().ClearFocus();
 596       }
 597       break;
 598     }
 599   }
 600 }
 601
 602 void Control::OnSizeSet(const Vector3& targetSize)
 603 {
 604   Toolkit::Visual::Base visual = mImpl->GetVisual(Toolkit::Control::Property::BACKGROUND);
 605   if(visual)
 606   {
 607     Vector2 size(targetSize);
 608     visual.SetTransformAndSize(Property::Map(), size); // Send an empty map as we do not want to modify the visual's set transform
 609   }
 610 }
 611
 612 void Control::OnSizeAnimation(Animation& animation, const Vector3& targetSize)
 613 {
 614   // @todo size negotiate background to new size, animate as well?
 615 }
 616
 617 bool Control::OnKeyEvent(const KeyEvent& event)
 618 {
 619   return false; // Do not consume
 620 }
 621
 622 void Control::OnRelayout(const Vector2& size, RelayoutContainer& container)
 623 {
 624   for(unsigned int i = 0, numChildren = Self().GetChildCount(); i < numChildren; ++i)
 625   {
 626     Actor   child = Self().GetChildAt(i);
 627     Vector2 newChildSize(size);
 628
 629     // When set the padding or margin on the control, child should be resized and repositioned.
 630     if((mImpl->mPadding.start != 0) || (mImpl->mPadding.end != 0) || (mImpl->mPadding.top != 0) || (mImpl->mPadding.bottom != 0) ||
 631        (mImpl->mMargin.start != 0) || (mImpl->mMargin.end != 0) || (mImpl->mMargin.top != 0) || (mImpl->mMargin.bottom != 0))
 632     {
 633       Extents padding = mImpl->mPadding;
 634
 635       Dali::CustomActor           ownerActor(GetOwner());
 636       Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>(ownerActor.GetProperty(Dali::Actor::Property::LAYOUT_DIRECTION).Get<int>());
 637
 638       if(Dali::LayoutDirection::RIGHT_TO_LEFT == layoutDirection)
 639       {
 640         std::swap(padding.start, padding.end);
 641       }
 642
 643       newChildSize.width  = size.width - (padding.start + padding.end);
 644       newChildSize.height = size.height - (padding.top + padding.bottom);
 645
 646       // Cannot use childs Position property as it can already have padding and margin applied on it,
 647       // so we end up cumulatively applying them over and over again.
 648       Vector2 childOffset(0.f, 0.f);
 649       childOffset.x += (mImpl->mMargin.start + padding.start);
 650       childOffset.y += (mImpl->mMargin.top + padding.top);
 651
 652       child.SetProperty(Actor::Property::POSITION, Vector2(childOffset.x, childOffset.y));
 653     }
 654     container.Add(child, newChildSize);
 655   }
 656
 657   Toolkit::Visual::Base visual = mImpl->GetVisual(Toolkit::Control::Property::BACKGROUND);
 658   if(visual)
 659   {
 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::OnSetResizePolicy(ResizePolicy::Type policy, Dimension::Type dimension)
 665 {
 666 }
 667
 668 Vector3 Control::GetNaturalSize()
 669 {
 670   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Control::GetNaturalSize for %s\n", Self().GetProperty<std::string>(Dali::Actor::Property::NAME).c_str());
 671   Toolkit::Visual::Base visual = mImpl->GetVisual(Toolkit::Control::Property::BACKGROUND);
 672   if(visual)
 673   {
 674     Vector2 naturalSize;
 675     visual.GetNaturalSize(naturalSize);
 676     naturalSize.width += (mImpl->mPadding.start + mImpl->mPadding.end);
 677     naturalSize.height += (mImpl->mPadding.top + mImpl->mPadding.bottom);
 678     return Vector3(naturalSize);
 679   }
 680   return Vector3::ZERO;
 681 }
 682
 683 float Control::CalculateChildSize(const Dali::Actor& child, Dimension::Type dimension)
 684 {
 685   return CalculateChildSizeBase(child, dimension);
 686 }
 687
 688 float Control::GetHeightForWidth(float width)
 689 {
 690   return GetHeightForWidthBase(width);
 691 }
 692
 693 float Control::GetWidthForHeight(float height)
 694 {
 695   return GetWidthForHeightBase(height);
 696 }
 697
 698 bool Control::RelayoutDependentOnChildren(Dimension::Type dimension)
 699 {
 700   return RelayoutDependentOnChildrenBase(dimension);
 701 }
 702
 703 void Control::OnCalculateRelayoutSize(Dimension::Type dimension)
 704 {
 705 }
 706
 707 void Control::OnLayoutNegotiated(float size, Dimension::Type dimension)
 708 {
 709 }
 710
 711 void Control::SignalConnected(SlotObserver* slotObserver, CallbackBase* callback)
 712 {
 713   mImpl->SignalConnected(slotObserver, callback);
 714 }
 715
 716 void Control::SignalDisconnected(SlotObserver* slotObserver, CallbackBase* callback)
 717 {
 718   mImpl->SignalDisconnected(slotObserver, callback);
 719 }
 720
 721 void Control::MakeVisualTransition(Dali::Property::Map& sourcePropertyMap, Dali::Property::Map& destinationPropertyMap, Dali::Toolkit::Control source, Dali::Toolkit::Control destination, Dali::Property::Index visualIndex)
 722 {
 723   sourcePropertyMap.Clear();
 724   destinationPropertyMap.Clear();
 725
 726   Toolkit::Visual::Base sourceVisual      = DevelControl::GetVisual(GetImplementation(source), visualIndex);
 727   Toolkit::Visual::Base destinationVisual = DevelControl::GetVisual(GetImplementation(destination), visualIndex);
 728
 729   // If source or destination doesn't have the visual, do not create transition for the visual.
 730   if(!sourceVisual || !destinationVisual)
 731   {
 732     return;
 733   }
 734
 735   Property::Map sourceMap;
 736   Property::Map destinationMap;
 737   sourceVisual.CreatePropertyMap(sourceMap);
 738   destinationVisual.CreatePropertyMap(destinationMap);
 739
 740   static auto findValueVector4 = [](const Property::Map& map, Property::Index index, const Vector4& defaultValue = Vector4()) -> Vector4 {
 741     Property::Value* propertyValue = map.Find(index);
 742     if(propertyValue)
 743     {
 744       return propertyValue->Get<Vector4>();
 745     }
 746     return defaultValue;
 747   };
 748
 749   static auto findValueFloat = [](const Property::Map& map, Property::Index index, const float& defaultValue = 0.0f) -> float {
 750     Property::Value* propertyValue = map.Find(index);
 751     if(propertyValue)
 752     {
 753       return propertyValue->Get<float>();
 754     }
 755     return defaultValue;
 756   };
 757
 758   Vector4 defaultMixColor(Color::TRANSPARENT);
 759   Vector4 defaultCornerRadius(0.0f, 0.0f, 0.0f, 0.0f);
 760   float   defaultBorderlineWidth(0.0f);
 761   Vector4 defaultBorderlineColor(0.0f, 0.0f, 0.0f, 1.0f);
 762   float   defaultBorderlineOffset(0.0f);
 763
 764   Vector4 sourceMixColor         = findValueVector4(sourceMap, Dali::Toolkit::Visual::Property::MIX_COLOR, defaultMixColor);
 765   Vector4 sourceCornerRadius     = findValueVector4(sourceMap, Toolkit::DevelVisual::Property::CORNER_RADIUS, defaultCornerRadius);
 766   float   sourceBorderlineWidth  = findValueFloat(sourceMap, Toolkit::DevelVisual::Property::BORDERLINE_WIDTH, defaultBorderlineWidth);
 767   Vector4 sourceBorderlineColor  = findValueVector4(sourceMap, Toolkit::DevelVisual::Property::BORDERLINE_COLOR, defaultBorderlineColor);
 768   float   sourceBorderlineOffset = findValueFloat(sourceMap, Toolkit::DevelVisual::Property::BORDERLINE_OFFSET, defaultBorderlineOffset);
 769
 770   Vector4 destinationMixColor         = findValueVector4(destinationMap, Dali::Toolkit::Visual::Property::MIX_COLOR, defaultMixColor);
 771   Vector4 destinationCornerRadius     = findValueVector4(destinationMap, Toolkit::DevelVisual::Property::CORNER_RADIUS, defaultCornerRadius);
 772   float   destinationBorderlineWidth  = findValueFloat(destinationMap, Toolkit::DevelVisual::Property::BORDERLINE_WIDTH, defaultBorderlineWidth);
 773   Vector4 destinationBorderlineColor  = findValueVector4(destinationMap, Toolkit::DevelVisual::Property::BORDERLINE_COLOR, defaultBorderlineColor);
 774   float   destinationBorderlineOffset = findValueFloat(destinationMap, Toolkit::DevelVisual::Property::BORDERLINE_OFFSET, defaultBorderlineOffset);
 775
 776   // If the value of the source Control and that of destination Control is different, the property should be transitioned.
 777   if(Vector3(sourceMixColor) != Vector3(destinationMixColor))
 778   {
 779     sourcePropertyMap.Add(Dali::Toolkit::Visual::Property::MIX_COLOR, Vector3(sourceMixColor));
 780     destinationPropertyMap.Add(Dali::Toolkit::Visual::Property::MIX_COLOR, Vector3(destinationMixColor));
 781   }
 782
 783   if(std::abs(sourceMixColor.a - destinationMixColor.a) > Math::MACHINE_EPSILON_1)
 784   {
 785     sourcePropertyMap.Add(Dali::Toolkit::Visual::Property::OPACITY, sourceMixColor.a);
 786     destinationPropertyMap.Add(Dali::Toolkit::Visual::Property::OPACITY, destinationMixColor.a);
 787   }
 788
 789   if(sourceCornerRadius != destinationCornerRadius)
 790   {
 791     sourcePropertyMap.Add(Dali::Toolkit::DevelVisual::Property::CORNER_RADIUS, sourceCornerRadius);
 792     destinationPropertyMap.Add(Dali::Toolkit::DevelVisual::Property::CORNER_RADIUS, destinationCornerRadius);
 793   }
 794
 795   if(!Dali::Equals(sourceBorderlineWidth, destinationBorderlineWidth))
 796   {
 797     sourcePropertyMap.Add(Dali::Toolkit::DevelVisual::Property::BORDERLINE_WIDTH, sourceBorderlineWidth);
 798     destinationPropertyMap.Add(Dali::Toolkit::DevelVisual::Property::BORDERLINE_WIDTH, destinationBorderlineWidth);
 799   }
 800
 801   if(sourceBorderlineColor != destinationBorderlineColor)
 802   {
 803     sourcePropertyMap.Add(Dali::Toolkit::DevelVisual::Property::BORDERLINE_COLOR, sourceBorderlineColor);
 804     destinationPropertyMap.Add(Dali::Toolkit::DevelVisual::Property::BORDERLINE_COLOR, destinationBorderlineColor);
 805   }
 806
 807   if(!Dali::Equals(sourceBorderlineOffset, destinationBorderlineOffset))
 808   {
 809     sourcePropertyMap.Add(Dali::Toolkit::DevelVisual::Property::BORDERLINE_OFFSET, sourceBorderlineOffset);
 810     destinationPropertyMap.Add(Dali::Toolkit::DevelVisual::Property::BORDERLINE_OFFSET, destinationBorderlineOffset);
 811   }
 812 }
 813
 814 Control& GetImplementation(Dali::Toolkit::Control& handle)
 815 {
 816   CustomActorImpl& customInterface = handle.GetImplementation();
 817   // downcast to control
 818   Control& impl = dynamic_cast<Internal::Control&>(customInterface);
 819   return impl;
 820 }
 821
 822 const Control& GetImplementation(const Dali::Toolkit::Control& handle)
 823 {
 824   const CustomActorImpl& customInterface = handle.GetImplementation();
 825   // downcast to control
 826   const Control& impl = dynamic_cast<const Internal::Control&>(customInterface);
 827   return impl;
 828 }
 829
 830 } // namespace Internal
 831
 832 } // namespace Toolkit
 833
 834 } // namespace Dali