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

   1 /*
   2  * Copyright (c) 2022 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/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 Creates a clipping renderer if required.
  68  * (EG. If no renders exist and clipping is enabled).
  69  * @param[in] controlImpl The control implementation.
  70  */
  71 void CreateClippingRenderer(Control& controlImpl)
  72 {
  73   // We want to add a transparent background if we do not have one for clipping.
  74   Actor self(controlImpl.Self());
  75   int   clippingMode = ClippingMode::DISABLED;
  76   if(self.GetProperty(Actor::Property::CLIPPING_MODE).Get(clippingMode))
  77   {
  78     Internal::Control::Impl& controlDataImpl = Internal::Control::Impl::Get(controlImpl);
  79
  80     if(clippingMode == ClippingMode::CLIP_CHILDREN && controlDataImpl.mVisuals.Empty() && self.GetRendererCount() == 0u)
  81     {
  82       controlImpl.SetBackgroundColor(Color::TRANSPARENT);
  83     }
  84   }
  85 }
  86
  87 } // unnamed namespace
  88
  89 Toolkit::Control Control::New()
  90 {
  91   return New(ControlBehaviour::CONTROL_BEHAVIOUR_DEFAULT);
  92 }
  93
  94 Toolkit::Control Control::New(ControlBehaviour additionalBehaviour)
  95 {
  96   // Create the implementation, temporarily owned on stack
  97   IntrusivePtr<Control> controlImpl = new Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT | additionalBehaviour));
  98
  99   // Pass ownership to handle
 100   Toolkit::Control handle(*controlImpl);
 101
 102   // Second-phase init of the implementation
 103   // This can only be done after the CustomActor connection has been made...
 104   controlImpl->Initialize();
 105
 106   return handle;
 107 }
 108
 109 void Control::SetStyleName(const std::string& styleName)
 110 {
 111   if(styleName != mImpl->mStyleName)
 112   {
 113     mImpl->mStyleName = styleName;
 114
 115     // Apply new style, if stylemanager is available
 116     Toolkit::StyleManager styleManager = Toolkit::StyleManager::Get();
 117     if(styleManager)
 118     {
 119       GetImpl(styleManager).ApplyThemeStyle(Toolkit::Control(GetOwner()));
 120     }
 121   }
 122 }
 123
 124 const std::string& Control::GetStyleName() const
 125 {
 126   return mImpl->mStyleName;
 127 }
 128
 129 void Control::SetBackgroundColor(const Vector4& color)
 130 {
 131   mImpl->mBackgroundColor = color;
 132
 133   Property::Map map;
 134   map[Toolkit::Visual::Property::TYPE]           = Toolkit::Visual::COLOR;
 135   map[Toolkit::ColorVisual::Property::MIX_COLOR] = color;
 136
 137   Toolkit::Visual::Base visual = mImpl->GetVisual(Toolkit::Control::Property::BACKGROUND);
 138   if(visual && visual.GetType() == Toolkit::Visual::COLOR)
 139   {
 140     // Update background color only
 141     mImpl->DoAction(Toolkit::Control::Property::BACKGROUND, DevelVisual::Action::UPDATE_PROPERTY, map);
 142     return;
 143   }
 144
 145   SetBackground(map);
 146 }
 147
 148 void Control::SetBackground(const Property::Map& map)
 149 {
 150   Toolkit::Visual::Base visual = Toolkit::VisualFactory::Get().CreateVisual(map);
 151   visual.SetName("background");
 152   if(visual)
 153   {
 154     mImpl->RegisterVisual(Toolkit::Control::Property::BACKGROUND, visual, DepthIndex::BACKGROUND);
 155
 156     // Trigger a size negotiation request that may be needed by the new visual to relayout its contents.
 157     RelayoutRequest();
 158   }
 159 }
 160
 161 void Control::ClearBackground()
 162 {
 163   mImpl->UnregisterVisual(Toolkit::Control::Property::BACKGROUND);
 164   mImpl->mBackgroundColor = Color::TRANSPARENT;
 165
 166   // Trigger a size negotiation request that may be needed when unregistering a visual.
 167   RelayoutRequest();
 168 }
 169
 170 Toolkit::DevelControl::ControlAccessible* Control::GetAccessibleObject()
 171 {
 172   return mImpl->GetAccessibleObject();
 173 }
 174
 175 void Control::EnableGestureDetection(GestureType::Value type)
 176 {
 177   if((type & GestureType::PINCH) && !mImpl->mPinchGestureDetector)
 178   {
 179     mImpl->mPinchGestureDetector = PinchGestureDetector::New();
 180     mImpl->mPinchGestureDetector.DetectedSignal().Connect(mImpl, &Impl::PinchDetected);
 181     mImpl->mPinchGestureDetector.Attach(Self());
 182   }
 183
 184   if((type & GestureType::PAN) && !mImpl->mPanGestureDetector)
 185   {
 186     mImpl->mPanGestureDetector = PanGestureDetector::New();
 187     mImpl->mPanGestureDetector.SetMaximumTouchesRequired(2);
 188     mImpl->mPanGestureDetector.DetectedSignal().Connect(mImpl, &Impl::PanDetected);
 189     mImpl->mPanGestureDetector.Attach(Self());
 190   }
 191
 192   if((type & GestureType::TAP) && !mImpl->mTapGestureDetector)
 193   {
 194     mImpl->mTapGestureDetector = TapGestureDetector::New();
 195     mImpl->mTapGestureDetector.DetectedSignal().Connect(mImpl, &Impl::TapDetected);
 196     mImpl->mTapGestureDetector.Attach(Self());
 197   }
 198
 199   if((type & GestureType::LONG_PRESS) && !mImpl->mLongPressGestureDetector)
 200   {
 201     mImpl->mLongPressGestureDetector = LongPressGestureDetector::New();
 202     mImpl->mLongPressGestureDetector.DetectedSignal().Connect(mImpl, &Impl::LongPressDetected);
 203     mImpl->mLongPressGestureDetector.Attach(Self());
 204   }
 205 }
 206
 207 void Control::DisableGestureDetection(GestureType::Value type)
 208 {
 209   if((type & GestureType::PINCH) && mImpl->mPinchGestureDetector)
 210   {
 211     mImpl->mPinchGestureDetector.Detach(Self());
 212     mImpl->mPinchGestureDetector.Reset();
 213   }
 214
 215   if((type & GestureType::PAN) && mImpl->mPanGestureDetector)
 216   {
 217     mImpl->mPanGestureDetector.Detach(Self());
 218     mImpl->mPanGestureDetector.Reset();
 219   }
 220
 221   if((type & GestureType::TAP) && mImpl->mTapGestureDetector)
 222   {
 223     mImpl->mTapGestureDetector.Detach(Self());
 224     mImpl->mTapGestureDetector.Reset();
 225   }
 226
 227   if((type & GestureType::LONG_PRESS) && mImpl->mLongPressGestureDetector)
 228   {
 229     mImpl->mLongPressGestureDetector.Detach(Self());
 230     mImpl->mLongPressGestureDetector.Reset();
 231   }
 232 }
 233
 234 PinchGestureDetector Control::GetPinchGestureDetector() const
 235 {
 236   return mImpl->mPinchGestureDetector;
 237 }
 238
 239 PanGestureDetector Control::GetPanGestureDetector() const
 240 {
 241   return mImpl->mPanGestureDetector;
 242 }
 243
 244 TapGestureDetector Control::GetTapGestureDetector() const
 245 {
 246   return mImpl->mTapGestureDetector;
 247 }
 248
 249 LongPressGestureDetector Control::GetLongPressGestureDetector() const
 250 {
 251   return mImpl->mLongPressGestureDetector;
 252 }
 253
 254 void Control::SetKeyboardNavigationSupport(bool isSupported)
 255 {
 256   mImpl->mIsKeyboardNavigationSupported = isSupported;
 257 }
 258
 259 bool Control::IsKeyboardNavigationSupported()
 260 {
 261   return mImpl->mIsKeyboardNavigationSupported;
 262 }
 263
 264 void Control::SetKeyInputFocus()
 265 {
 266   if(Self().GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 267   {
 268     Toolkit::KeyInputFocusManager::Get().SetFocus(Toolkit::Control::DownCast(Self()));
 269   }
 270 }
 271
 272 bool Control::HasKeyInputFocus()
 273 {
 274   bool result = false;
 275   if(Self().GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 276   {
 277     Toolkit::Control control = Toolkit::KeyInputFocusManager::Get().GetCurrentFocusControl();
 278     if(Self() == control)
 279     {
 280       result = true;
 281     }
 282   }
 283   return result;
 284 }
 285
 286 void Control::ClearKeyInputFocus()
 287 {
 288   if(Self().GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 289   {
 290     Toolkit::KeyInputFocusManager::Get().RemoveFocus(Toolkit::Control::DownCast(Self()));
 291   }
 292 }
 293
 294 void Control::SetAsKeyboardFocusGroup(bool isFocusGroup)
 295 {
 296   mImpl->mIsKeyboardFocusGroup = isFocusGroup;
 297
 298   // The following line will be removed when the deprecated API in KeyboardFocusManager is deleted
 299   Toolkit::KeyboardFocusManager::Get().SetAsFocusGroup(Self(), isFocusGroup);
 300 }
 301
 302 bool Control::IsKeyboardFocusGroup()
 303 {
 304   return Toolkit::KeyboardFocusManager::Get().IsFocusGroup(Self());
 305 }
 306
 307 void Control::AccessibilityActivate()
 308 {
 309   // Inform deriving classes
 310   OnAccessibilityActivated();
 311 }
 312
 313 void Control::KeyboardEnter()
 314 {
 315   // Inform deriving classes
 316   OnKeyboardEnter();
 317 }
 318
 319 bool Control::OnAccessibilityActivated()
 320 {
 321   if(Toolkit::KeyboardFocusManager::Get().SetCurrentFocusActor(Self()))
 322   {
 323     return OnKeyboardEnter();
 324   }
 325   return false;
 326 }
 327
 328 bool Control::OnKeyboardEnter()
 329 {
 330   return false; // Keyboard enter is not handled by default
 331 }
 332
 333 bool Control::OnAccessibilityPan(PanGesture gesture)
 334 {
 335   return false; // Accessibility pan gesture is not handled by default
 336 }
 337
 338 bool Control::OnAccessibilityValueChange(bool isIncrease)
 339 {
 340   return false; // Accessibility value change action is not handled by default
 341 }
 342
 343 bool Control::OnAccessibilityZoom()
 344 {
 345   return false; // Accessibility zoom action is not handled by default
 346 }
 347
 348 DevelControl::ControlAccessible* Control::CreateAccessibleObject()
 349 {
 350   return new DevelControl::ControlAccessible(Self());
 351 }
 352
 353 Actor Control::GetNextKeyboardFocusableActor(Actor currentFocusedActor, Toolkit::Control::KeyboardFocus::Direction direction, bool loopEnabled)
 354 {
 355   return Actor();
 356 }
 357
 358 void Control::OnKeyboardFocusChangeCommitted(Actor commitedFocusableActor)
 359 {
 360 }
 361
 362 Toolkit::Control::KeyEventSignalType& Control::KeyEventSignal()
 363 {
 364   return mImpl->mKeyEventSignal;
 365 }
 366
 367 Toolkit::Control::KeyInputFocusSignalType& Control::KeyInputFocusGainedSignal()
 368 {
 369   return mImpl->mKeyInputFocusGainedSignal;
 370 }
 371
 372 Toolkit::Control::KeyInputFocusSignalType& Control::KeyInputFocusLostSignal()
 373 {
 374   return mImpl->mKeyInputFocusLostSignal;
 375 }
 376
 377 bool Control::EmitKeyEventSignal(const KeyEvent& event)
 378 {
 379   // Guard against destruction during signal emission
 380   Dali::Toolkit::Control handle(GetOwner());
 381
 382   bool consumed = false;
 383
 384   consumed = mImpl->FilterKeyEvent(event);
 385
 386   // signals are allocated dynamically when someone connects
 387   if(!consumed && !mImpl->mKeyEventSignal.Empty())
 388   {
 389     consumed = mImpl->mKeyEventSignal.Emit(handle, event);
 390   }
 391
 392   if(!consumed)
 393   {
 394     // Notification for derived classes
 395     consumed = OnKeyEvent(event);
 396   }
 397
 398   return consumed;
 399 }
 400
 401 Control::Control(ControlBehaviour behaviourFlags)
 402 : CustomActorImpl(static_cast<ActorFlags>(behaviourFlags)),
 403   mImpl(new Impl(*this))
 404 {
 405   mImpl->mFlags = behaviourFlags;
 406 }
 407
 408 Control::~Control()
 409 {
 410   delete mImpl;
 411 }
 412
 413 void Control::Initialize()
 414 {
 415   // Call deriving classes so initialised before styling is applied to them.
 416   OnInitialize();
 417
 418   if(!(mImpl->mFlags & DISABLE_STYLE_CHANGE_SIGNALS))
 419   {
 420     Toolkit::StyleManager styleManager = StyleManager::Get();
 421
 422     // if stylemanager is available
 423     if(styleManager)
 424     {
 425       StyleManager& styleManagerImpl = GetImpl(styleManager);
 426
 427       // Register for style changes
 428       styleManagerImpl.ControlStyleChangeSignal().Connect(this, &Control::OnStyleChange);
 429
 430       // Apply the current style
 431       styleManagerImpl.ApplyThemeStyleAtInit(Toolkit::Control(GetOwner()));
 432     }
 433   }
 434
 435   if(mImpl->mFlags & REQUIRES_KEYBOARD_NAVIGATION_SUPPORT)
 436   {
 437     SetKeyboardNavigationSupport(true);
 438   }
 439
 440   Dali::TypeInfo type;
 441   Self().GetTypeInfo(type);
 442   if(type)
 443   {
 444     auto typeName = type.GetName();
 445     DevelControl::AppendAccessibilityAttribute(Toolkit::Control::DownCast(Self()), "class", typeName);
 446   }
 447 }
 448
 449 void Control::OnInitialize()
 450 {
 451 }
 452
 453 void Control::OnStyleChange(Toolkit::StyleManager styleManager, StyleChange::Type change)
 454 {
 455   // By default the control is only interested in theme (not font) changes
 456   if(styleManager && change == StyleChange::THEME_CHANGE)
 457   {
 458     GetImpl(styleManager).ApplyThemeStyle(Toolkit::Control(GetOwner()));
 459     RelayoutRequest();
 460   }
 461 }
 462
 463 void Control::OnPinch(const PinchGesture& pinch)
 464 {
 465   if(!(mImpl->mStartingPinchScale))
 466   {
 467     // lazy allocate
 468     mImpl->mStartingPinchScale = new Vector3;
 469   }
 470
 471   if(pinch.GetState() == GestureState::STARTED)
 472   {
 473     *(mImpl->mStartingPinchScale) = Self().GetCurrentProperty<Vector3>(Actor::Property::SCALE);
 474   }
 475
 476   Self().SetProperty(Actor::Property::SCALE, *(mImpl->mStartingPinchScale) * pinch.GetScale());
 477 }
 478
 479 void Control::OnPan(const PanGesture& pan)
 480 {
 481 }
 482
 483 void Control::OnTap(const TapGesture& tap)
 484 {
 485 }
 486
 487 void Control::OnLongPress(const LongPressGesture& longPress)
 488 {
 489 }
 490
 491 void Control::EmitKeyInputFocusSignal(bool focusGained)
 492 {
 493   Dali::Toolkit::Control handle(GetOwner());
 494
 495   if(Accessibility::IsUp())
 496   {
 497     auto self = GetAccessibleObject();
 498     self->EmitFocused(focusGained);
 499     auto parent = self->GetParent();
 500     if(parent && !self->GetStates()[Dali::Accessibility::State::MANAGES_DESCENDANTS])
 501     {
 502       parent->EmitActiveDescendantChanged(self);
 503     }
 504   }
 505
 506   if(focusGained)
 507   {
 508     // signals are allocated dynamically when someone connects
 509     if(!mImpl->mKeyInputFocusGainedSignal.Empty())
 510     {
 511       mImpl->mKeyInputFocusGainedSignal.Emit(handle);
 512     }
 513   }
 514   else
 515   {
 516     // signals are allocated dynamically when someone connects
 517     if(!mImpl->mKeyInputFocusLostSignal.Empty())
 518     {
 519       mImpl->mKeyInputFocusLostSignal.Emit(handle);
 520     }
 521   }
 522 }
 523
 524 void Control::OnSceneConnection(int depth)
 525 {
 526   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Control::OnSceneConnection number of registered visuals(%d)\n", mImpl->mVisuals.Size());
 527
 528   Actor self(Self());
 529
 530   for(RegisteredVisualContainer::Iterator iter = mImpl->mVisuals.Begin(); iter != mImpl->mVisuals.End(); iter++)
 531   {
 532     // Check whether the visual is empty and enabled
 533     if((*iter)->visual && (*iter)->enabled)
 534     {
 535       DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Control::OnSceneConnection Setting visual(%d) on scene\n", (*iter)->index);
 536       Toolkit::GetImplementation((*iter)->visual).SetOnScene(self);
 537     }
 538   }
 539
 540   // The clipping renderer is only created if required.
 541   CreateClippingRenderer(*this);
 542 }
 543
 544 void Control::OnSceneDisconnection()
 545 {
 546   mImpl->OnSceneDisconnection();
 547 }
 548
 549 void Control::OnKeyInputFocusGained()
 550 {
 551   EmitKeyInputFocusSignal(true);
 552 }
 553
 554 void Control::OnKeyInputFocusLost()
 555 {
 556   EmitKeyInputFocusSignal(false);
 557 }
 558
 559 void Control::OnChildAdd(Actor& child)
 560 {
 561 }
 562
 563 void Control::OnChildRemove(Actor& child)
 564 {
 565 }
 566
 567 void Control::OnPropertySet(Property::Index index, const Property::Value& propertyValue)
 568 {
 569   // If the clipping mode has been set, we may need to create a renderer.
 570   // Only do this if we are already on-stage as the OnSceneConnection will handle the off-stage clipping controls.
 571   switch(index)
 572   {
 573     case Actor::Property::CLIPPING_MODE:
 574     {
 575       if(Self().GetProperty<bool>(Actor::Property::CONNECTED_TO_SCENE))
 576       {
 577         // Note: This method will handle whether creation of the renderer is required.
 578         CreateClippingRenderer(*this);
 579       }
 580       break;
 581     }
 582     case Actor::Property::VISIBLE:
 583     {
 584       GetAccessibleObject()->EmitVisible(Self().GetProperty<bool>(Actor::Property::VISIBLE));
 585       break;
 586     }
 587     case DevelActor::Property::USER_INTERACTION_ENABLED:
 588     {
 589       const bool enabled = propertyValue.Get<bool>();
 590       if (!enabled && Self() == Dali::Toolkit::KeyboardFocusManager::Get().GetCurrentFocusActor())
 591       {
 592         Dali::Toolkit::KeyboardFocusManager::Get().ClearFocus();
 593       }
 594       break;
 595     }
 596   }
 597 }
 598
 599 void Control::OnSizeSet(const Vector3& targetSize)
 600 {
 601   Toolkit::Visual::Base visual = mImpl->GetVisual(Toolkit::Control::Property::BACKGROUND);
 602   if(visual)
 603   {
 604     Vector2 size(targetSize);
 605     visual.SetTransformAndSize(Property::Map(), size); // Send an empty map as we do not want to modify the visual's set transform
 606   }
 607 }
 608
 609 void Control::OnSizeAnimation(Animation& animation, const Vector3& targetSize)
 610 {
 611   // @todo size negotiate background to new size, animate as well?
 612 }
 613
 614 bool Control::OnKeyEvent(const KeyEvent& event)
 615 {
 616   return false; // Do not consume
 617 }
 618
 619 void Control::OnRelayout(const Vector2& size, RelayoutContainer& container)
 620 {
 621   for(unsigned int i = 0, numChildren = Self().GetChildCount(); i < numChildren; ++i)
 622   {
 623     Actor   child = Self().GetChildAt(i);
 624     Vector2 newChildSize(size);
 625
 626     // When set the padding or margin on the control, child should be resized and repositioned.
 627     if((mImpl->mPadding.start != 0) || (mImpl->mPadding.end != 0) || (mImpl->mPadding.top != 0) || (mImpl->mPadding.bottom != 0) ||
 628        (mImpl->mMargin.start != 0) || (mImpl->mMargin.end != 0) || (mImpl->mMargin.top != 0) || (mImpl->mMargin.bottom != 0))
 629     {
 630       Extents padding = mImpl->mPadding;
 631
 632       Dali::CustomActor           ownerActor(GetOwner());
 633       Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>(ownerActor.GetProperty(Dali::Actor::Property::LAYOUT_DIRECTION).Get<int>());
 634
 635       if(Dali::LayoutDirection::RIGHT_TO_LEFT == layoutDirection)
 636       {
 637         std::swap(padding.start, padding.end);
 638       }
 639
 640       newChildSize.width  = size.width - (padding.start + padding.end);
 641       newChildSize.height = size.height - (padding.top + padding.bottom);
 642
 643       // Cannot use childs Position property as it can already have padding and margin applied on it,
 644       // so we end up cumulatively applying them over and over again.
 645       Vector2 childOffset(0.f, 0.f);
 646       childOffset.x += (mImpl->mMargin.start + padding.start);
 647       childOffset.y += (mImpl->mMargin.top + padding.top);
 648
 649       child.SetProperty(Actor::Property::POSITION, Vector2(childOffset.x, childOffset.y));
 650     }
 651     container.Add(child, newChildSize);
 652   }
 653
 654   Toolkit::Visual::Base visual = mImpl->GetVisual(Toolkit::Control::Property::BACKGROUND);
 655   if(visual)
 656   {
 657     visual.SetTransformAndSize(Property::Map(), size); // Send an empty map as we do not want to modify the visual's set transform
 658   }
 659 }
 660
 661 void Control::OnSetResizePolicy(ResizePolicy::Type policy, Dimension::Type dimension)
 662 {
 663 }
 664
 665 Vector3 Control::GetNaturalSize()
 666 {
 667   DALI_LOG_INFO(gLogFilter, Debug::Verbose, "Control::GetNaturalSize for %s\n", Self().GetProperty<std::string>(Dali::Actor::Property::NAME).c_str());
 668   Toolkit::Visual::Base visual = mImpl->GetVisual(Toolkit::Control::Property::BACKGROUND);
 669   if(visual)
 670   {
 671     Vector2 naturalSize;
 672     visual.GetNaturalSize(naturalSize);
 673     naturalSize.width += (mImpl->mPadding.start + mImpl->mPadding.end);
 674     naturalSize.height += (mImpl->mPadding.top + mImpl->mPadding.bottom);
 675     return Vector3(naturalSize);
 676   }
 677   return Vector3::ZERO;
 678 }
 679
 680 float Control::CalculateChildSize(const Dali::Actor& child, Dimension::Type dimension)
 681 {
 682   return CalculateChildSizeBase(child, dimension);
 683 }
 684
 685 float Control::GetHeightForWidth(float width)
 686 {
 687   return GetHeightForWidthBase(width);
 688 }
 689
 690 float Control::GetWidthForHeight(float height)
 691 {
 692   return GetWidthForHeightBase(height);
 693 }
 694
 695 bool Control::RelayoutDependentOnChildren(Dimension::Type dimension)
 696 {
 697   return RelayoutDependentOnChildrenBase(dimension);
 698 }
 699
 700 void Control::OnCalculateRelayoutSize(Dimension::Type dimension)
 701 {
 702 }
 703
 704 void Control::OnLayoutNegotiated(float size, Dimension::Type dimension)
 705 {
 706 }
 707
 708 void Control::SignalConnected(SlotObserver* slotObserver, CallbackBase* callback)
 709 {
 710   mImpl->SignalConnected(slotObserver, callback);
 711 }
 712
 713 void Control::SignalDisconnected(SlotObserver* slotObserver, CallbackBase* callback)
 714 {
 715   mImpl->SignalDisconnected(slotObserver, callback);
 716 }
 717
 718 void Control::MakeVisualTransition(Dali::Property::Map& sourcePropertyMap, Dali::Property::Map& destinationPropertyMap,
 719                                    Dali::Toolkit::Control source, Dali::Toolkit::Control destination, Dali::Property::Index visualIndex)
 720 {
 721   sourcePropertyMap.Clear();
 722   destinationPropertyMap.Clear();
 723
 724   Toolkit::Visual::Base sourceVisual      = DevelControl::GetVisual(GetImplementation(source), visualIndex);
 725   Toolkit::Visual::Base destinationVisual = DevelControl::GetVisual(GetImplementation(destination), visualIndex);
 726
 727   // If source or destination doesn't have the visual, do not create transition for the visual.
 728   if(!sourceVisual || !destinationVisual)
 729   {
 730     return;
 731   }
 732
 733   Property::Map sourceMap;
 734   Property::Map destinationMap;
 735   sourceVisual.CreatePropertyMap(sourceMap);
 736   destinationVisual.CreatePropertyMap(destinationMap);
 737
 738   static auto findValueVector4 = [](const Property::Map& map, Property::Index index, const Vector4& defaultValue = Vector4()) -> Vector4
 739   {
 740     Property::Value* propertyValue = map.Find(index);
 741     if(propertyValue)
 742     {
 743       return propertyValue->Get<Vector4>();
 744     }
 745     return defaultValue;
 746   };
 747
 748   static auto findValueFloat = [](const Property::Map& map, Property::Index index, const float& defaultValue = 0.0f) -> float
 749   {
 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(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(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