dali-toolkit/internal/controls/scrollable/item-view/item-view-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 <dali-toolkit/internal/controls/scrollable/item-view/item-view-impl.h>
  19
  20 // EXTERNAL INCLUDES
  21 #include <algorithm>
  22
  23 // INTERNAL INCLUDES
  24 #include <dali/public-api/events/mouse-wheel-event.h>
  25 #include <dali-toolkit/public-api/controls/scrollable/item-view/item-factory.h>
  26 #include <dali-toolkit/internal/controls/scrollable/scroll-connector-impl.h>
  27
  28 using namespace std;
  29 using namespace Dali;
  30
  31 namespace // unnamed namespace
  32 {
  33
  34 //Type registration
  35 TypeRegistration mType( typeid(Toolkit::ItemView), typeid(Toolkit::Scrollable), NULL );
  36
  37 const float DEFAULT_MINIMUM_SWIPE_SPEED = 1.0f;
  38 const float DEFAULT_MINIMUM_SWIPE_DISTANCE = 3.0f;
  39 const float DEFAULT_MOUSE_WHEEL_SCROLL_DISTANCE_STEP_PROPORTION = 0.1f;
  40
  41 const float DEFAULT_REFRESH_INTERVAL_LAYOUT_POSITIONS = 20.0f; // 1 updates per 20 items
  42 const int MOUSE_WHEEL_EVENT_FINISHED_TIME_OUT = 500;  // 0.5 second
  43
  44 const float DEFAULT_ANCHORING_DURATION = 1.0f;  // 1 second
  45 const float DEFAULT_COLOR_VISIBILITY_REMOVE_TIME = 0.5f; // 0.5 second
  46
  47 const float MILLISECONDS_PER_SECONDS = 1000.0f;
  48
  49 const char* OVERSHOOT_OVERLAY_RIPPLE_IMAGE_PATH = DALI_IMAGE_DIR "overshoot_ripple.png";
  50 const Rect<int> OVERSHOOT_BOUNCE_IMAGE_1_PIXEL_AREA( 0, 0, 720, 58 );
  51 const Vector4 OVERSHOOT_OVERLAY_NINE_PATCH_BORDER(0.0f, 0.0f, 1.0f, 12.0f);
  52 const float MAXIMUM_OVERSHOOT_HEIGHT = 36.0f;  // 36 pixels
  53 const float DEFAULT_OVERSHOOT_ANIMATION_DURATION = 0.5f;  // 0.5 second
  54 const float DEFAULT_KEYBOARD_FOCUS_SCROLL_DURATION = 0.2f;
  55
  56 const string LAYOUT_POSITION_PROPERTY_NAME( "item-view-layout-position" );
  57 const string POSITION_PROPERTY_NAME( "item-view-position" );
  58 const string MINIMUM_LAYOUT_POSITION_PROPERTY_NAME( "item-view-minimum-layout-position" );
  59 const string SCROLL_SPEED_PROPERTY_NAME( "item-view-scroll-speed" );
  60 const string SCROLL_DIRECTION_PROPERTY_NAME( "item-view-scroll-direction" );
  61 const string OVERSHOOT_PROPERTY_NAME( "item-view-overshoot" );
  62
  63 // Functors which wrap constraint functions with stored item IDs
  64
  65 struct WrappedVector3Constraint
  66 {
  67   WrappedVector3Constraint(Toolkit::ItemLayout::Vector3Function wrapMe, unsigned int itemId)
  68   : mWrapMe(wrapMe),
  69     mItemId(itemId)
  70   {
  71   }
  72
  73   Vector3 operator()(const Vector3& current, const PropertyInput& layoutPosition, const PropertyInput& scrollSpeed, const PropertyInput& layoutSize)
  74   {
  75     float offsetLayoutPosition = layoutPosition.GetFloat() + static_cast<float>(mItemId);
  76
  77     return mWrapMe(current, offsetLayoutPosition, scrollSpeed.GetFloat(), layoutSize.GetVector3());
  78   }
  79
  80   Toolkit::ItemLayout::Vector3Function mWrapMe;
  81   unsigned int mItemId;
  82 };
  83
  84 struct WrappedQuaternionConstraint
  85 {
  86   WrappedQuaternionConstraint(Toolkit::ItemLayout::QuaternionFunction wrapMe, unsigned int itemId)
  87   : mWrapMe(wrapMe),
  88     mItemId(itemId)
  89   {
  90   }
  91
  92   Quaternion operator()(const Quaternion& current, const PropertyInput& layoutPosition, const PropertyInput& scrollSpeed, const PropertyInput& layoutSize)
  93   {
  94     float offsetLayoutPosition = layoutPosition.GetFloat() + static_cast<float>(mItemId);
  95
  96     return mWrapMe(current, offsetLayoutPosition, scrollSpeed.GetFloat(), layoutSize.GetVector3());
  97   }
  98
  99   Toolkit::ItemLayout::QuaternionFunction mWrapMe;
 100   unsigned int mItemId;
 101 };
 102
 103 struct WrappedVector4Constraint
 104 {
 105   WrappedVector4Constraint(Toolkit::ItemLayout::Vector4Function wrapMe, unsigned int itemId)
 106   : mWrapMe(wrapMe),
 107     mItemId(itemId)
 108   {
 109   }
 110
 111   Vector4 operator()(const Vector4& current, const PropertyInput& layoutPosition, const PropertyInput& scrollSpeed, const PropertyInput& layoutSize)
 112   {
 113     float offsetLayoutPosition = layoutPosition.GetFloat() + static_cast<float>(mItemId);
 114
 115     return mWrapMe(current, offsetLayoutPosition, scrollSpeed.GetFloat(), layoutSize.GetVector3());
 116   }
 117
 118   Toolkit::ItemLayout::Vector4Function mWrapMe;
 119   unsigned int mItemId;
 120 };
 121
 122 struct WrappedBoolConstraint
 123 {
 124   WrappedBoolConstraint(Toolkit::ItemLayout::BoolFunction wrapMe, unsigned int itemId)
 125   : mWrapMe(wrapMe),
 126     mItemId(itemId)
 127   {
 128   }
 129
 130   bool operator()(const bool& current, const PropertyInput& layoutPosition, const PropertyInput& scrollSpeed, const PropertyInput& layoutSize)
 131   {
 132     float offsetLayoutPosition = layoutPosition.GetFloat() + static_cast<float>(mItemId);
 133
 134     return mWrapMe(current, offsetLayoutPosition, scrollSpeed.GetFloat(), layoutSize.GetVector3());
 135   }
 136
 137   Toolkit::ItemLayout::BoolFunction mWrapMe;
 138   unsigned int mItemId;
 139 };
 140
 141 /**
 142  * Local helper to convert pan distance (in actor coordinates) to the layout-specific scrolling direction
 143  */
 144 float CalculateScrollDistance(Vector2 panDistance, Toolkit::ItemLayout& layout)
 145 {
 146   Radian scrollDirection(layout.GetScrollDirection());
 147
 148   float cosTheta = cosf(scrollDirection);
 149   float sinTheta = sinf(scrollDirection);
 150
 151   return panDistance.x * sinTheta + panDistance.y * cosTheta;
 152 }
 153
 154 // Overshoot overlay constraints
 155
 156 struct OvershootOverlaySizeConstraint
 157 {
 158   float operator()(const float& current,
 159                      const PropertyInput& parentScrollDirectionProperty,
 160                      const PropertyInput& parentOvershootProperty,
 161                      const PropertyInput& parentSizeProperty)
 162   {
 163     const Vector3 parentScrollDirection = parentScrollDirectionProperty.GetVector3();
 164     const Vector3 parentSize = parentSizeProperty.GetVector3();
 165     const Toolkit::ControlOrientation::Type& parentOrientation = static_cast<Toolkit::ControlOrientation::Type>(parentScrollDirection.z);
 166
 167     float overlayWidth;
 168
 169     if(Toolkit::IsVertical(parentOrientation))
 170     {
 171       overlayWidth = fabsf(parentScrollDirection.y) > Math::MACHINE_EPSILON_1 ? parentSize.x : parentSize.y;
 172     }
 173     else
 174     {
 175       overlayWidth = fabsf(parentScrollDirection.x) > Math::MACHINE_EPSILON_1 ? parentSize.y : parentSize.x;
 176     }
 177
 178     return overlayWidth;
 179   }
 180 };
 181
 182 struct OvershootOverlayRotationConstraint
 183 {
 184   Quaternion operator()(const Quaternion& current,
 185                         const PropertyInput& parentScrollDirectionProperty,
 186                         const PropertyInput& parentOvershootProperty)
 187   {
 188     const Vector3 parentScrollDirection = parentScrollDirectionProperty.GetVector3();
 189     const float parentOvershoot = parentOvershootProperty.GetFloat();
 190     const Toolkit::ControlOrientation::Type& parentOrientation = static_cast<Toolkit::ControlOrientation::Type>(parentScrollDirection.z);
 191
 192     Quaternion rotation;
 193
 194     if(Toolkit::IsVertical(parentOrientation))
 195     {
 196       if(fabsf(parentScrollDirection.y) <= Math::MACHINE_EPSILON_1)
 197       {
 198         if( (parentOrientation == Toolkit::ControlOrientation::Up && parentOvershoot < Math::MACHINE_EPSILON_0)
 199             || (parentOrientation == Toolkit::ControlOrientation::Down && parentOvershoot > Math::MACHINE_EPSILON_0) )
 200         {
 201           rotation = Quaternion(0.5f * Math::PI, Vector3::ZAXIS);
 202         }
 203         else
 204         {
 205           rotation = Quaternion(1.5f * Math::PI, Vector3::ZAXIS);
 206         }
 207       }
 208       else if( (parentOvershoot > Math::MACHINE_EPSILON_0 && parentScrollDirection.y > Math::MACHINE_EPSILON_0)
 209             || (parentOvershoot < Math::MACHINE_EPSILON_0 && parentScrollDirection.y < Math::MACHINE_EPSILON_0) )
 210       {
 211         rotation = Quaternion(0.0f, Vector3::ZAXIS);
 212       }
 213       else
 214       {
 215         rotation = Quaternion(Math::PI, Vector3::ZAXIS);
 216       }
 217     }
 218     else
 219     {
 220       if(fabsf(parentScrollDirection.x) <= Math::MACHINE_EPSILON_1)
 221       {
 222         if( (parentOrientation == Toolkit::ControlOrientation::Left && parentOvershoot > Math::MACHINE_EPSILON_0)
 223             ||(parentOrientation == Toolkit::ControlOrientation::Right && parentOvershoot < Math::MACHINE_EPSILON_0) )
 224         {
 225           rotation = Quaternion(Math::PI, Vector3::ZAXIS);
 226         }
 227         else
 228         {
 229           rotation = Quaternion(0.0f, Vector3::ZAXIS);
 230         }
 231       }
 232       else if( (parentOvershoot > Math::MACHINE_EPSILON_0 && parentScrollDirection.x > Math::MACHINE_EPSILON_0)
 233             || (parentOvershoot < Math::MACHINE_EPSILON_0 && parentScrollDirection.x < Math::MACHINE_EPSILON_0) )
 234       {
 235         rotation = Quaternion(1.5f * Math::PI, Vector3::ZAXIS);
 236       }
 237       else
 238       {
 239         rotation = Quaternion(0.5f * Math::PI, Vector3::ZAXIS);
 240       }
 241     }
 242
 243     return rotation;
 244   }
 245 };
 246
 247 struct OvershootOverlayPositionConstraint
 248 {
 249   Vector3 operator()(const Vector3&    current,
 250                      const PropertyInput& parentSizeProperty,
 251                      const PropertyInput& parentScrollDirectionProperty,
 252                      const PropertyInput& parentOvershootProperty)
 253   {
 254     const Vector3 parentScrollDirection = parentScrollDirectionProperty.GetVector3();
 255     const float parentOvershoot = parentOvershootProperty.GetFloat();
 256     const Vector3 parentSize = parentSizeProperty.GetVector3();
 257     const Toolkit::ControlOrientation::Type& parentOrientation = static_cast<Toolkit::ControlOrientation::Type>(parentScrollDirection.z);
 258
 259     Vector3 relativeOffset;
 260
 261     if(Toolkit::IsVertical(parentOrientation))
 262     {
 263       if(fabsf(parentScrollDirection.y) <= Math::MACHINE_EPSILON_1)
 264       {
 265         if( (parentOrientation == Toolkit::ControlOrientation::Up && parentOvershoot < Math::MACHINE_EPSILON_0)
 266             || (parentOrientation == Toolkit::ControlOrientation::Down && parentOvershoot > Math::MACHINE_EPSILON_0) )
 267         {
 268           relativeOffset = Vector3(1.0f, 0.0f, 0.0f);
 269         }
 270         else
 271         {
 272           relativeOffset =Vector3(0.0f, 1.0f, 0.0f);
 273         }
 274       }
 275       else if( (parentOvershoot > Math::MACHINE_EPSILON_0 && parentScrollDirection.y > Math::MACHINE_EPSILON_0)
 276             || (parentOvershoot < Math::MACHINE_EPSILON_0 && parentScrollDirection.y < Math::MACHINE_EPSILON_0) )
 277       {
 278         relativeOffset = Vector3(0.0f, 0.0f, 0.0f);
 279       }
 280       else
 281       {
 282         relativeOffset = Vector3(1.0f, 1.0f, 0.0f);
 283       }
 284     }
 285     else
 286     {
 287       if(fabsf(parentScrollDirection.x) <= Math::MACHINE_EPSILON_1)
 288       {
 289         if( (parentOrientation == Toolkit::ControlOrientation::Left && parentOvershoot < Math::MACHINE_EPSILON_0)
 290             || (parentOrientation == Toolkit::ControlOrientation::Right && parentOvershoot > Math::MACHINE_EPSILON_0) )
 291         {
 292           relativeOffset = Vector3(0.0f, 0.0f, 0.0f);
 293         }
 294         else
 295         {
 296           relativeOffset = Vector3(1.0f, 1.0f, 0.0f);
 297         }
 298       }
 299       else if( (parentOvershoot > Math::MACHINE_EPSILON_0 && parentScrollDirection.x > Math::MACHINE_EPSILON_0)
 300             || (parentOvershoot < Math::MACHINE_EPSILON_0 && parentScrollDirection.x < Math::MACHINE_EPSILON_0) )
 301       {
 302         relativeOffset = Vector3(0.0f, 1.0f, 0.0f);
 303       }
 304       else
 305       {
 306         relativeOffset = Vector3(1.0f, 0.0f, 0.0f);
 307       }
 308     }
 309
 310     return relativeOffset * parentSize;
 311
 312   }
 313 };
 314
 315 struct OvershootOverlayVisibilityConstraint
 316 {
 317   bool operator()(const bool& current,
 318                   const PropertyInput& parentLayoutScrollableProperty)
 319   {
 320     const bool parentLayoutScrollable = parentLayoutScrollableProperty.GetBoolean();
 321
 322     return parentLayoutScrollable;
 323   }
 324 };
 325
 326 /**
 327  * Relative position Constraint
 328  * Generates the relative position value of the item view based on the layout position,
 329  * and it's relation to the layout domain. This is a value from 0.0f to 1.0f in each axis.
 330  */
 331 Vector3 RelativePositionConstraint(const Vector3& current,
 332                                    const PropertyInput& scrollPositionProperty,
 333                                    const PropertyInput& scrollMinProperty,
 334                                    const PropertyInput& scrollMaxProperty,
 335                                    const PropertyInput& layoutSizeProperty)
 336 {
 337   const Vector3& position = Vector3(0.0f, scrollPositionProperty.GetFloat(), 0.0f);
 338   const Vector3& min = scrollMinProperty.GetVector3();
 339   const Vector3& max = scrollMaxProperty.GetVector3();
 340
 341   Vector3 relativePosition;
 342   Vector3 domainSize = max - min;
 343
 344   relativePosition.x = fabsf(domainSize.x) > Math::MACHINE_EPSILON_1 ? ((min.x - position.x) / fabsf(domainSize.x)) : 0.0f;
 345   relativePosition.y = fabsf(domainSize.y) > Math::MACHINE_EPSILON_1 ? ((min.y - position.y) / fabsf(domainSize.y)) : 0.0f;
 346
 347   return relativePosition;
 348 }
 349
 350 } // unnamed namespace
 351
 352 namespace Dali
 353 {
 354
 355 namespace Toolkit
 356 {
 357
 358 namespace Internal
 359 {
 360
 361 namespace // unnamed namespace
 362 {
 363
 364 bool FindById( const ItemContainer& items, ItemId id )
 365 {
 366   for( ConstItemIter iter = items.begin(); items.end() != iter; ++iter )
 367   {
 368     if( iter->first == id )
 369     {
 370       return true;
 371     }
 372   }
 373
 374   return false;
 375 }
 376
 377 } // unnamed namespace
 378
 379 Dali::Toolkit::ItemView ItemView::New(ItemFactory& factory)
 380 {
 381   // Create the implementation
 382   ItemViewPtr itemView(new ItemView(factory));
 383
 384   // Pass ownership to CustomActor via derived handle
 385   Dali::Toolkit::ItemView handle(*itemView);
 386
 387   // Second-phase init of the implementation
 388   // This can only be done after the CustomActor connection has been made...
 389   itemView->Initialize();
 390
 391   return handle;
 392 }
 393
 394 ItemView::ItemView(ItemFactory& factory)
 395 : Scrollable(),
 396   mItemFactory(factory),
 397   mActiveLayout(NULL),
 398   mDefaultAlphaFunction(Dali::Constraint::DEFAULT_ALPHA_FUNCTION),
 399   mAnimatingOvershootOn(false),
 400   mAnimateOvershootOff(false),
 401   mAnchoringEnabled(true),
 402   mAnchoringDuration(DEFAULT_ANCHORING_DURATION),
 403   mRefreshIntervalLayoutPositions(DEFAULT_REFRESH_INTERVAL_LAYOUT_POSITIONS),
 404   mRefreshOrderHint(true/*Refresh item 0 first*/),
 405   mMinimumSwipeSpeed(DEFAULT_MINIMUM_SWIPE_SPEED),
 406   mMinimumSwipeDistance(DEFAULT_MINIMUM_SWIPE_DISTANCE),
 407   mScrollDistance(0.0f),
 408   mScrollSpeed(0.0f),
 409   mTotalPanDisplacement(Vector2::ZERO),
 410   mScrollOvershoot(0.0f),
 411   mIsFlicking(false),
 412   mGestureState(Gesture::Clear),
 413   mAddingItems(false),
 414   mRefreshEnabled(true)
 415 {
 416   SetRequiresMouseWheelEvents(true);
 417   SetKeyboardNavigationSupport(true);
 418 }
 419
 420 void ItemView::OnInitialize()
 421 {
 422   SetSizePolicy( Toolkit::Control::Fixed, Toolkit::Control::Fixed );
 423
 424   RegisterCommonProperties();
 425
 426   Actor self = Self();
 427
 428   mOvershootEffect = OvershootRippleEffect::New();
 429   Image overshootImage = Image::New( OVERSHOOT_OVERLAY_RIPPLE_IMAGE_PATH );
 430   mOvershootOverlay = ImageActor::New( overshootImage );
 431   mOvershootOverlay.SetParentOrigin(ParentOrigin::TOP_LEFT);
 432   mOvershootOverlay.SetAnchorPoint(AnchorPoint::TOP_LEFT);
 433   mOvershootOverlay.SetDrawMode(DrawMode::OVERLAY);
 434   mOvershootOverlay.SetShaderEffect(mOvershootEffect);
 435   mOvershootOverlay.SetPixelArea(OVERSHOOT_BOUNCE_IMAGE_1_PIXEL_AREA);
 436   self.Add(mOvershootOverlay);
 437
 438   mScrollConnector = Dali::Toolkit::ScrollConnector::New();
 439   mScrollPositionObject = mScrollConnector.GetScrollPositionObject();
 440
 441   mPropertyMinimumLayoutPosition = self.RegisterProperty(MINIMUM_LAYOUT_POSITION_PROPERTY_NAME, 0.0f);
 442   mPropertyPosition = self.RegisterProperty(POSITION_PROPERTY_NAME, 0.0f);
 443   mPropertyScrollSpeed = self.RegisterProperty(SCROLL_SPEED_PROPERTY_NAME, 0.0f);
 444
 445   ApplyOvershootOverlayConstraints();
 446
 447   Constraint constraint = Constraint::New<Vector3>(mPropertyRelativePosition,
 448                                                    LocalSource(mPropertyPosition),
 449                                                    LocalSource(mPropertyPositionMin),
 450                                                    LocalSource(mPropertyPositionMax),
 451                                                    LocalSource(Actor::SIZE),
 452                                                    RelativePositionConstraint);
 453   self.ApplyConstraint(constraint);
 454
 455   Vector2 stageSize = Stage::GetCurrent().GetSize();
 456   mMouseWheelScrollDistanceStep = stageSize.y * DEFAULT_MOUSE_WHEEL_SCROLL_DISTANCE_STEP_PROPORTION;
 457
 458   EnableGestureDetection(Gesture::Type(Gesture::Pan));
 459
 460   mMouseWheelEventFinishedTimer = Timer::New( MOUSE_WHEEL_EVENT_FINISHED_TIME_OUT );
 461   mMouseWheelEventFinishedTimer.TickSignal().Connect( this, &ItemView::OnMouseWheelEventFinished );
 462
 463   SetRefreshInterval(mRefreshIntervalLayoutPositions);
 464 }
 465
 466 ItemView::~ItemView()
 467 {
 468 }
 469
 470 Dali::Toolkit::ScrollConnector ItemView::GetScrollConnector() const
 471 {
 472   return mScrollConnector;
 473 }
 474
 475 unsigned int ItemView::GetLayoutCount() const
 476 {
 477   return mLayouts.size();
 478 }
 479
 480 void ItemView::AddLayout(ItemLayout& layout)
 481 {
 482   mLayouts.push_back(ItemLayoutPtr(&layout));
 483 }
 484
 485 void ItemView::RemoveLayout(unsigned int layoutIndex)
 486 {
 487   DALI_ASSERT_ALWAYS(layoutIndex < mLayouts.size());
 488
 489   if (mActiveLayout == mLayouts[layoutIndex].Get())
 490   {
 491     mActiveLayout = NULL;
 492   }
 493
 494   mLayouts.erase(mLayouts.begin() + layoutIndex);
 495 }
 496
 497 ItemLayoutPtr ItemView::GetLayout(unsigned int layoutIndex) const
 498 {
 499   return mLayouts[layoutIndex];
 500 }
 501
 502 ItemLayoutPtr ItemView::GetActiveLayout() const
 503 {
 504   return ItemLayoutPtr(mActiveLayout);
 505 }
 506
 507 float ItemView::GetCurrentLayoutPosition(unsigned int itemId) const
 508 {
 509   return mScrollPositionObject.GetProperty<float>( ScrollConnector::SCROLL_POSITION ) + static_cast<float>( itemId );
 510 }
 511
 512 void ItemView::ActivateLayout(unsigned int layoutIndex, const Vector3& targetSize, float durationSeconds)
 513 {
 514   DALI_ASSERT_ALWAYS(layoutIndex < mLayouts.size());
 515
 516   Actor self = Self();
 517
 518   // The ItemView size should match the active layout size
 519   self.SetSize(targetSize);
 520   mActiveLayoutTargetSize = targetSize;
 521
 522   // Switch to the new layout
 523   mActiveLayout = mLayouts[layoutIndex].Get();
 524
 525   // Move the items to the new layout positions...
 526
 527   bool resizeAnimationNeeded(false);
 528
 529   for (ConstItemPoolIter iter = mItemPool.begin(); iter != mItemPool.end(); ++iter)
 530   {
 531     unsigned int itemId = iter->first;
 532     Actor actor = iter->second;
 533
 534     // Remove constraints from previous layout
 535     actor.RemoveConstraints();
 536
 537     Vector3 size;
 538     if(mActiveLayout->GetItemSize(itemId, targetSize, size))
 539     {
 540       if( durationSeconds > 0.0f )
 541       {
 542         // Use a size animation
 543         if (!resizeAnimationNeeded)
 544         {
 545           resizeAnimationNeeded = true;
 546           RemoveAnimation(mResizeAnimation);
 547           mResizeAnimation = Animation::New(durationSeconds);
 548         }
 549
 550         // The layout provides its own resize animation
 551         mActiveLayout->GetResizeAnimation(mResizeAnimation, actor, size, durationSeconds);
 552       }
 553       else
 554       {
 555         // resize immediately
 556         actor.SetSize(size);
 557       }
 558     }
 559
 560     ApplyConstraints(actor, *mActiveLayout, itemId, durationSeconds);
 561   }
 562
 563   if (resizeAnimationNeeded)
 564   {
 565     mResizeAnimation.Play();
 566   }
 567
 568   // Refresh the new layout
 569   ItemRange range = GetItemRange(*mActiveLayout, targetSize, GetCurrentLayoutPosition(0), true/*reserve extra*/);
 570   AddActorsWithinRange( range, durationSeconds );
 571
 572   // Scroll to an appropriate layout position
 573
 574   bool scrollAnimationNeeded(false);
 575   float firstItemScrollPosition(0.0f);
 576
 577   float current = GetCurrentLayoutPosition(0);
 578   float minimum = ClampFirstItemPosition(current, targetSize, *mActiveLayout);
 579   self.SetProperty(mPropertyPosition, GetScrollPosition(current, targetSize));
 580
 581   if (current < minimum)
 582   {
 583     scrollAnimationNeeded = true;
 584     firstItemScrollPosition = minimum;
 585   }
 586   else if (mAnchoringEnabled)
 587   {
 588     scrollAnimationNeeded = true;
 589     firstItemScrollPosition = mActiveLayout->GetClosestAnchorPosition(current);
 590   }
 591
 592   if (scrollAnimationNeeded)
 593   {
 594     RemoveAnimation(mScrollAnimation);
 595     mScrollAnimation = Animation::New(mAnchoringDuration);
 596     mScrollAnimation.AnimateTo( Property( mScrollPositionObject, ScrollConnector::SCROLL_POSITION ), firstItemScrollPosition, AlphaFunctions::EaseOut );
 597     mScrollAnimation.AnimateTo( Property(self, mPropertyPosition), GetScrollPosition(firstItemScrollPosition, targetSize), AlphaFunctions::EaseOut );
 598     mScrollAnimation.Play();
 599   }
 600
 601   self.SetProperty(mPropertyMinimumLayoutPosition, mActiveLayout->GetMinimumLayoutPosition(mItemFactory.GetNumberOfItems(), targetSize));
 602   AnimateScrollOvershoot(0.0f);
 603   mScrollOvershoot = 0.0f;
 604
 605   Radian scrollDirection(mActiveLayout->GetScrollDirection());
 606   float orientation = static_cast<float>(mActiveLayout->GetOrientation());
 607   self.SetProperty(mPropertyScrollDirection, Vector3(sinf(scrollDirection), cosf(scrollDirection), orientation));
 608
 609   self.SetProperty(mPropertyScrollSpeed, mScrollSpeed);
 610
 611   CalculateDomainSize(targetSize);
 612 }
 613
 614 void ItemView::DeactivateCurrentLayout()
 615 {
 616   if (mActiveLayout)
 617   {
 618     for (ConstItemPoolIter iter = mItemPool.begin(); iter != mItemPool.end(); ++iter)
 619     {
 620       Actor actor = iter->second;
 621       actor.RemoveConstraints();
 622     }
 623
 624     mActiveLayout = NULL;
 625   }
 626 }
 627
 628 void ItemView::SetDefaultAlphaFunction(AlphaFunction func)
 629 {
 630   mDefaultAlphaFunction = func;
 631 }
 632
 633 AlphaFunction ItemView::GetDefaultAlphaFunction() const
 634 {
 635   return mDefaultAlphaFunction;
 636 }
 637
 638 void ItemView::OnRefreshNotification(PropertyNotification& source)
 639 {
 640   if(mRefreshEnabled)
 641   {
 642     // Only refresh the cache during normal scrolling
 643     DoRefresh(GetCurrentLayoutPosition(0), true);
 644   }
 645 }
 646
 647 void ItemView::DoRefresh(float currentLayoutPosition, bool cacheExtra)
 648 {
 649   if (mActiveLayout)
 650   {
 651     ItemRange range = GetItemRange(*mActiveLayout, mActiveLayoutTargetSize, currentLayoutPosition, cacheExtra/*reserve extra*/);
 652     RemoveActorsOutsideRange( range );
 653     AddActorsWithinRange( range, 0.0f/*immediate*/ );
 654
 655     mScrollUpdatedSignalV2.Emit( Vector3(0.0f, currentLayoutPosition, 0.0f) );
 656   }
 657 }
 658
 659 void ItemView::SetMinimumSwipeSpeed(float speed)
 660 {
 661   mMinimumSwipeSpeed = speed;
 662 }
 663
 664 float ItemView::GetMinimumSwipeSpeed() const
 665 {
 666   return mMinimumSwipeSpeed;
 667 }
 668
 669 void ItemView::SetMinimumSwipeDistance(float distance)
 670 {
 671   mMinimumSwipeDistance = distance;
 672 }
 673
 674 float ItemView::GetMinimumSwipeDistance() const
 675 {
 676   return mMinimumSwipeDistance;
 677 }
 678
 679 void ItemView::SetMouseWheelScrollDistanceStep(float step)
 680 {
 681   mMouseWheelScrollDistanceStep = step;
 682 }
 683
 684 float ItemView::GetMouseWheelScrollDistanceStep() const
 685 {
 686   return mMouseWheelScrollDistanceStep;
 687 }
 688
 689 void ItemView::SetAnchoring(bool enabled)
 690 {
 691   mAnchoringEnabled = enabled;
 692 }
 693
 694 bool ItemView::GetAnchoring() const
 695 {
 696   return mAnchoringEnabled;
 697 }
 698
 699 void ItemView::SetAnchoringDuration(float durationSeconds)
 700 {
 701   mAnchoringDuration = durationSeconds;
 702 }
 703
 704 float ItemView::GetAnchoringDuration() const
 705 {
 706   return mAnchoringDuration;
 707 }
 708
 709 void ItemView::SetRefreshInterval(float intervalLayoutPositions)
 710 {
 711   mRefreshIntervalLayoutPositions = intervalLayoutPositions;
 712
 713   if(mRefreshNotification)
 714   {
 715     mScrollPositionObject.RemovePropertyNotification(mRefreshNotification);
 716   }
 717   mRefreshNotification = mScrollPositionObject.AddPropertyNotification( ScrollConnector::SCROLL_POSITION, StepCondition(mRefreshIntervalLayoutPositions, 0.0f) );
 718   mRefreshNotification.NotifySignal().Connect( this, &ItemView::OnRefreshNotification );
 719 }
 720
 721 float ItemView::GetRefreshInterval() const
 722 {
 723   return mRefreshIntervalLayoutPositions;
 724 }
 725
 726 void ItemView::SetRefreshEnabled(bool enabled)
 727 {
 728   mRefreshEnabled = enabled;
 729 }
 730
 731 Actor ItemView::GetItem(unsigned int itemId) const
 732 {
 733   Actor actor;
 734
 735   ConstItemPoolIter iter = mItemPool.find( itemId );
 736   if( iter != mItemPool.end() )
 737   {
 738     actor = iter->second;
 739   }
 740
 741   return actor;
 742 }
 743
 744 unsigned int ItemView::GetItemId( Actor actor ) const
 745 {
 746   unsigned int itemId( 0 );
 747
 748   for ( ConstItemPoolIter iter = mItemPool.begin(); iter != mItemPool.end(); ++iter )
 749   {
 750     if( iter->second == actor )
 751     {
 752       itemId = iter->first;
 753       break;
 754     }
 755   }
 756
 757   return itemId;
 758 }
 759
 760 void ItemView::InsertItem( Item newItem, float durationSeconds )
 761 {
 762   mAddingItems = true;
 763
 764   SetupActor( newItem, durationSeconds );
 765   Self().Add( newItem.second );
 766
 767   ItemPoolIter foundIter = mItemPool.find( newItem.first );
 768   if( mItemPool.end() != foundIter )
 769   {
 770     Actor moveMe = foundIter->second;
 771     foundIter->second = newItem.second;
 772
 773     // Move the existing actors to make room
 774     for( ItemPoolIter iter = ++foundIter; mItemPool.end() != iter; ++iter )
 775     {
 776       Actor temp = iter->second;
 777       iter->second = moveMe;
 778       moveMe = temp;
 779
 780       iter->second.RemoveConstraints();
 781       ApplyConstraints( iter->second, *mActiveLayout, iter->first, durationSeconds );
 782     }
 783
 784     // Create last item
 785     ItemId lastId = mItemPool.rbegin()->first;
 786     Item lastItem( lastId + 1, moveMe );
 787     mItemPool.insert( lastItem );
 788
 789     lastItem.second.RemoveConstraints();
 790     ApplyConstraints( lastItem.second, *mActiveLayout, lastItem.first, durationSeconds );
 791   }
 792   else
 793   {
 794     mItemPool.insert( newItem );
 795   }
 796
 797   CalculateDomainSize(Self().GetCurrentSize());
 798
 799   mAddingItems = false;
 800 }
 801
 802 void ItemView::InsertItems( const ItemContainer& newItems, float durationSeconds )
 803 {
 804   mAddingItems = true;
 805
 806   // Insert from lowest id to highest
 807   set<Item> sortedItems;
 808   for( ConstItemIter iter = newItems.begin(); newItems.end() != iter; ++iter )
 809   {
 810     sortedItems.insert( *iter );
 811   }
 812
 813   for( set<Item>::iterator iter = sortedItems.begin(); sortedItems.end() != iter; ++iter )
 814   {
 815     Self().Add( iter->second );
 816
 817     cout << "inserting item: " << iter->first << endl;
 818
 819     ItemPoolIter foundIter = mItemPool.find( iter->first );
 820     if( mItemPool.end() != foundIter )
 821     {
 822       Actor moveMe = foundIter->second;
 823       foundIter->second = iter->second;
 824
 825       // Move the existing actors to make room
 826       for( ItemPoolIter iter = ++foundIter; mItemPool.end() != iter; ++iter )
 827       {
 828         Actor temp = iter->second;
 829         iter->second = moveMe;
 830         moveMe = temp;
 831       }
 832
 833       // Create last item
 834       ItemId lastId = mItemPool.rbegin()->first;
 835       Item lastItem( lastId + 1, moveMe );
 836       mItemPool.insert( lastItem );
 837     }
 838     else
 839     {
 840       mItemPool.insert( *iter );
 841     }
 842   }
 843
 844   // Relayout everything
 845   for (ItemPoolIter iter = mItemPool.begin(); iter != mItemPool.end(); ++iter)
 846   {
 847     // If newly inserted
 848     if( FindById( newItems, iter->first ) )
 849     {
 850       SetupActor( *iter, durationSeconds );
 851     }
 852     else
 853     {
 854       iter->second.RemoveConstraints();
 855       ApplyConstraints( iter->second, *mActiveLayout, iter->first, durationSeconds );
 856     }
 857   }
 858
 859   CalculateDomainSize(Self().GetCurrentSize());
 860
 861   mAddingItems = false;
 862 }
 863
 864 void ItemView::RemoveItem( unsigned int itemId, float durationSeconds )
 865 {
 866   bool actorRemoved = RemoveActor( itemId );
 867   if( actorRemoved )
 868   {
 869     ReapplyAllConstraints( durationSeconds );
 870   }
 871 }
 872
 873 void ItemView::RemoveItems( const ItemIdContainer& itemIds, float durationSeconds )
 874 {
 875   bool actorRemoved( false );
 876
 877   // Remove from highest id to lowest
 878   set<ItemId> sortedItems;
 879   for( ConstItemIdIter iter = itemIds.begin(); itemIds.end() != iter; ++iter )
 880   {
 881     sortedItems.insert( *iter );
 882   }
 883
 884   for( set<ItemId>::reverse_iterator iter = sortedItems.rbegin(); sortedItems.rend() != iter; ++iter )
 885   {
 886     if( RemoveActor( *iter ) )
 887     {
 888       actorRemoved = true;
 889     }
 890   }
 891
 892   if( actorRemoved )
 893   {
 894     ReapplyAllConstraints( durationSeconds );
 895   }
 896 }
 897
 898 bool ItemView::RemoveActor(unsigned int itemId)
 899 {
 900   bool removed( false );
 901
 902   const ItemPoolIter removeIter = mItemPool.find( itemId );
 903
 904   if( removeIter != mItemPool.end() )
 905   {
 906     Self().Remove( removeIter->second );
 907     removed = true;
 908
 909     // Adjust the remaining item IDs, for example if item 2 is removed:
 910     //   Initial actors:     After insert:
 911     //     ID 1 - ActorA       ID 1 - ActorA
 912     //     ID 2 - ActorB       ID 2 - ActorC (previously ID 3)
 913     //     ID 3 - ActorC       ID 3 - ActorB (previously ID 4)
 914     //     ID 4 - ActorD
 915     for (ItemPoolIter iter = removeIter; iter != mItemPool.end(); ++iter)
 916     {
 917       if( iter->first < mItemPool.rbegin()->first )
 918       {
 919         iter->second = mItemPool[ iter->first + 1 ];
 920       }
 921       else
 922       {
 923         mItemPool.erase( iter );
 924         break;
 925       }
 926     }
 927   }
 928
 929   return removed;
 930 }
 931
 932 void ItemView::ReplaceItem( Item replacementItem, float durationSeconds )
 933 {
 934   mAddingItems = true;
 935
 936   SetupActor( replacementItem, durationSeconds );
 937   Self().Add( replacementItem.second );
 938
 939   const ItemPoolIter iter = mItemPool.find( replacementItem.first );
 940   if( mItemPool.end() != iter )
 941   {
 942     Self().Remove( iter->second );
 943     iter->second = replacementItem.second;
 944   }
 945   else
 946   {
 947     mItemPool.insert( replacementItem );
 948   }
 949
 950   CalculateDomainSize(Self().GetCurrentSize());
 951
 952   mAddingItems = false;
 953 }
 954
 955 void ItemView::ReplaceItems( const ItemContainer& replacementItems, float durationSeconds )
 956 {
 957   for( ConstItemIter iter = replacementItems.begin(); replacementItems.end() != iter; ++iter )
 958   {
 959     ReplaceItem( *iter, durationSeconds );
 960   }
 961 }
 962
 963 void ItemView::RemoveActorsOutsideRange( ItemRange range )
 964 {
 965   // Remove unwanted actors from the ItemView & ItemPool
 966   for (ItemPoolIter iter = mItemPool.begin(); iter != mItemPool.end(); )
 967   {
 968     unsigned int current = iter->first;
 969
 970     if( ! range.Within( current ) )
 971     {
 972       Self().Remove( iter->second );
 973
 974       mItemPool.erase( iter++ ); // erase invalidates the return value of post-increment; iter remains valid
 975     }
 976     else
 977     {
 978       ++iter;
 979     }
 980   }
 981 }
 982
 983 void ItemView::AddActorsWithinRange( ItemRange range, float durationSeconds )
 984 {
 985   range.end = min(mItemFactory.GetNumberOfItems(), range.end);
 986
 987   // The order of addition depends on the scroll direction.
 988   if (mRefreshOrderHint)
 989   {
 990     for (unsigned int itemId = range.begin; itemId < range.end; ++itemId)
 991     {
 992       AddNewActor( itemId, durationSeconds );
 993     }
 994   }
 995   else
 996   {
 997     for (unsigned int itemId = range.end; itemId > range.begin; --itemId)
 998     {
 999       AddNewActor( itemId-1, durationSeconds );
1000     }
1001   }
1002
1003   // Total number of items may change dynamically.
1004   // Always recalculate the domain size to reflect that.
1005   CalculateDomainSize(Self().GetCurrentSize());
1006 }
1007
1008 void ItemView::AddNewActor( unsigned int itemId, float durationSeconds )
1009 {
1010   mAddingItems = true;
1011
1012   if( mItemPool.end() == mItemPool.find( itemId ) )
1013   {
1014     Actor actor = mItemFactory.NewItem( itemId );
1015
1016     if( actor )
1017     {
1018       Item newItem( itemId, actor );
1019
1020       mItemPool.insert( newItem );
1021
1022       SetupActor( newItem, durationSeconds );
1023       Self().Add( actor );
1024     }
1025   }
1026
1027   mAddingItems = false;
1028 }
1029
1030 void ItemView::SetupActor( Item item, float durationSeconds )
1031 {
1032   item.second.SetParentOrigin( ParentOrigin::CENTER );
1033   item.second.SetAnchorPoint( AnchorPoint::CENTER );
1034
1035   if( mActiveLayout )
1036   {
1037     Vector3 size;
1038     if( mActiveLayout->GetItemSize( item.first, mActiveLayoutTargetSize, size ) )
1039     {
1040       item.second.SetSize( size );
1041     }
1042
1043     ApplyConstraints( item.second, *mActiveLayout, item.first, durationSeconds );
1044   }
1045 }
1046
1047 ItemRange ItemView::GetItemRange(ItemLayout& layout, const Vector3& layoutSize, float layoutPosition, bool reserveExtra)
1048 {
1049   unsigned int itemCount = mItemFactory.GetNumberOfItems();
1050
1051   ItemRange available(0u, itemCount);
1052
1053   ItemRange range = layout.GetItemsWithinArea( layoutPosition, layoutSize );
1054
1055   if (reserveExtra)
1056   {
1057     // Add the reserve items for scrolling
1058     unsigned int extra = layout.GetReserveItemCount(layoutSize);
1059     range.begin = (range.begin >= extra) ? (range.begin - extra) : 0u;
1060     range.end += extra;
1061   }
1062
1063   return range.Intersection(available);
1064 }
1065
1066 void ItemView::OnChildAdd(Actor& child)
1067 {
1068   if(!mAddingItems)
1069   {
1070     // We don't want to do this downcast check for any item added by ItemView itself.
1071     Dali::Toolkit::ScrollComponent scrollComponent = Dali::Toolkit::ScrollComponent::DownCast(child);
1072     if(scrollComponent)
1073     {
1074       // Set the scroll connector when scroll bar is being added
1075       scrollComponent.SetScrollConnector(mScrollConnector);
1076     }
1077   }
1078 }
1079
1080 bool ItemView::OnTouchEvent(const TouchEvent& event)
1081 {
1082   // Ignore events with multiple-touch points
1083   if (event.GetPointCount() != 1)
1084   {
1085     return false;
1086   }
1087
1088   if (event.GetPoint(0).state == TouchPoint::Down)
1089   {
1090     // Cancel ongoing scrolling etc.
1091     mGestureState = Gesture::Clear;
1092
1093     mScrollDistance = 0.0f;
1094     mScrollSpeed = 0.0f;
1095     Self().SetProperty(mPropertyScrollSpeed, mScrollSpeed);
1096
1097     mScrollOvershoot = 0.0f;
1098     AnimateScrollOvershoot(0.0f);
1099
1100     mScrollCompletedSignalV2.Emit(GetCurrentScrollPosition());
1101
1102     RemoveAnimation(mScrollAnimation);
1103   }
1104
1105   return true; // consume since we're potentially scrolling
1106 }
1107
1108 bool ItemView::OnMouseWheelEvent(const MouseWheelEvent& event)
1109 {
1110   // Respond the mouse wheel event to scroll
1111   if (mActiveLayout)
1112   {
1113     Actor self = Self();
1114     const Vector3 layoutSize = Self().GetCurrentSize();
1115     float layoutPositionDelta = GetCurrentLayoutPosition(0) + (event.z * mMouseWheelScrollDistanceStep * mActiveLayout->GetScrollSpeedFactor());
1116     float firstItemScrollPosition = ClampFirstItemPosition(layoutPositionDelta, layoutSize, *mActiveLayout);
1117
1118     mScrollPositionObject.SetProperty( ScrollConnector::SCROLL_POSITION, firstItemScrollPosition );
1119     self.SetProperty(mPropertyPosition, GetScrollPosition(firstItemScrollPosition, layoutSize));
1120     mScrollStartedSignalV2.Emit(GetCurrentScrollPosition());
1121   }
1122
1123   if (mMouseWheelEventFinishedTimer.IsRunning())
1124   {
1125     mMouseWheelEventFinishedTimer.Stop();
1126   }
1127
1128   mMouseWheelEventFinishedTimer.Start();
1129
1130   return true;
1131 }
1132
1133 bool ItemView::OnMouseWheelEventFinished()
1134 {
1135   if (mActiveLayout)
1136   {
1137     RemoveAnimation(mScrollAnimation);
1138
1139     // No more mouse wheel events coming. Do the anchoring if enabled.
1140     mScrollAnimation = DoAnchoring();
1141     if (mScrollAnimation)
1142     {
1143       mScrollAnimation.FinishedSignal().Connect(this, &ItemView::OnScrollFinished);
1144       mScrollAnimation.Play();
1145     }
1146     else
1147     {
1148       mScrollOvershoot = 0.0f;
1149       AnimateScrollOvershoot(0.0f);
1150
1151       mScrollCompletedSignalV2.Emit(GetCurrentScrollPosition());
1152     }
1153   }
1154
1155   return false;
1156 }
1157
1158 void ItemView::ApplyConstraints(Actor& actor, ItemLayout& layout, unsigned int itemId, float duration)
1159 {
1160   ItemLayout::Vector3Function positionConstraint;
1161   if (layout.GetPositionConstraint(itemId, positionConstraint))
1162   {
1163     WrappedVector3Constraint wrapped(positionConstraint, itemId);
1164
1165     Constraint constraint = Constraint::New<Vector3>( Actor::POSITION,
1166                                                       Source( mScrollPositionObject, ScrollConnector::SCROLL_POSITION ),
1167                                                       ParentSource( mPropertyScrollSpeed ),
1168                                                       ParentSource( Actor::SIZE ),
1169                                                       wrapped );
1170     constraint.SetApplyTime(duration);
1171     constraint.SetAlphaFunction(mDefaultAlphaFunction);
1172
1173     actor.ApplyConstraint(constraint);
1174   }
1175
1176   ItemLayout::QuaternionFunction rotationConstraint;
1177   if (layout.GetRotationConstraint(itemId, rotationConstraint))
1178   {
1179     WrappedQuaternionConstraint wrapped(rotationConstraint, itemId);
1180
1181     Constraint constraint = Constraint::New<Quaternion>( Actor::ROTATION,
1182                                                          Source( mScrollPositionObject, ScrollConnector::SCROLL_POSITION ),
1183                                                          ParentSource( mPropertyScrollSpeed ),
1184                                                          ParentSource( Actor::SIZE ),
1185                                                          wrapped );
1186     constraint.SetApplyTime(duration);
1187     constraint.SetAlphaFunction(mDefaultAlphaFunction);
1188
1189     actor.ApplyConstraint(constraint);
1190   }
1191
1192   ItemLayout::Vector3Function scaleConstraint;
1193   if (layout.GetScaleConstraint(itemId, scaleConstraint))
1194   {
1195     WrappedVector3Constraint wrapped(scaleConstraint, itemId);
1196
1197     Constraint constraint = Constraint::New<Vector3>( Actor::SCALE,
1198                                                       Source( mScrollPositionObject, ScrollConnector::SCROLL_POSITION ),
1199                                                       ParentSource( mPropertyScrollSpeed ),
1200                                                       ParentSource( Actor::SIZE ),
1201                                                       wrapped );
1202     constraint.SetApplyTime(duration);
1203     constraint.SetAlphaFunction(mDefaultAlphaFunction);
1204
1205     actor.ApplyConstraint(constraint);
1206   }
1207
1208   ItemLayout::Vector4Function colorConstraint;
1209   if (layout.GetColorConstraint(itemId, colorConstraint))
1210   {
1211     WrappedVector4Constraint wrapped(colorConstraint, itemId);
1212
1213     Constraint constraint = Constraint::New<Vector4>( Actor::COLOR,
1214                                                       Source( mScrollPositionObject, ScrollConnector::SCROLL_POSITION ),
1215                                                       ParentSource( mPropertyScrollSpeed ),
1216                                                       ParentSource( Actor::SIZE ),
1217                                                       wrapped );
1218     constraint.SetApplyTime(duration);
1219     constraint.SetAlphaFunction(mDefaultAlphaFunction);
1220
1221     // Release color constraints slowly; this allows ItemView to co-exist with ImageActor fade-in
1222     constraint.SetRemoveTime(DEFAULT_COLOR_VISIBILITY_REMOVE_TIME);
1223     constraint.SetRemoveAction(Dali::Constraint::Discard);
1224
1225     actor.ApplyConstraint(constraint);
1226   }
1227
1228   ItemLayout::BoolFunction visibilityConstraint;
1229   if (layout.GetVisibilityConstraint(itemId, visibilityConstraint))
1230   {
1231     WrappedBoolConstraint wrapped(visibilityConstraint, itemId);
1232
1233     Constraint constraint = Constraint::New<bool>( Actor::VISIBLE,
1234                                                    Source( mScrollPositionObject, ScrollConnector::SCROLL_POSITION ),
1235                                                    ParentSource( mPropertyScrollSpeed ),
1236                                                    ParentSource( Actor::SIZE ),
1237                                                    wrapped );
1238     constraint.SetApplyTime(duration);
1239     constraint.SetAlphaFunction(mDefaultAlphaFunction);
1240
1241     // Release visibility constraints the same time as the color constraint
1242     constraint.SetRemoveTime(DEFAULT_COLOR_VISIBILITY_REMOVE_TIME);
1243     constraint.SetRemoveAction(Dali::Constraint::Discard);
1244
1245     actor.ApplyConstraint(constraint);
1246   }
1247 }
1248
1249 void ItemView::ReapplyAllConstraints( float durationSeconds )
1250 {
1251   for (ConstItemPoolIter iter = mItemPool.begin(); iter != mItemPool.end(); ++iter)
1252   {
1253     unsigned int id = iter->first;
1254     Actor actor = iter->second;
1255
1256     actor.RemoveConstraints();
1257     ApplyConstraints(actor, *mActiveLayout, id, durationSeconds);
1258   }
1259
1260   CalculateDomainSize(Self().GetCurrentSize());
1261 }
1262
1263 float ItemView::ClampFirstItemPosition(float targetPosition, const Vector3& targetSize, ItemLayout& layout)
1264 {
1265   Actor self = Self();
1266   float minLayoutPosition = layout.GetMinimumLayoutPosition(mItemFactory.GetNumberOfItems(), targetSize);
1267   float clamppedPosition = min(0.0f, max(minLayoutPosition, targetPosition));
1268   mScrollOvershoot = targetPosition - clamppedPosition;
1269   self.SetProperty(mPropertyMinimumLayoutPosition, minLayoutPosition);
1270
1271   return clamppedPosition;
1272 }
1273
1274 void ItemView::OnPan(PanGesture gesture)
1275 {
1276   Actor self = Self();
1277   const Vector3 layoutSize = Self().GetCurrentSize();
1278
1279   RemoveAnimation(mScrollAnimation);
1280
1281   // Short-circuit if there is no active layout
1282   if (!mActiveLayout)
1283   {
1284     mGestureState = Gesture::Clear;
1285     return;
1286   }
1287
1288   mGestureState = gesture.state;
1289
1290   switch (mGestureState)
1291   {
1292     case Gesture::Finished:
1293     {
1294       // Swipe Detection
1295       if (fabsf(mScrollDistance) > mMinimumSwipeDistance &&
1296           mScrollSpeed > mMinimumSwipeSpeed)
1297       {
1298         float direction = (mScrollDistance < 0.0f) ? -1.0f : 1.0f;
1299
1300         mRefreshOrderHint = true;
1301
1302         float currentLayoutPosition = GetCurrentLayoutPosition(0);
1303         float firstItemScrollPosition = ClampFirstItemPosition(currentLayoutPosition + mScrollSpeed * direction,
1304                                                                layoutSize,
1305                                                                *mActiveLayout);
1306
1307         if (mAnchoringEnabled)
1308         {
1309           firstItemScrollPosition = mActiveLayout->GetClosestAnchorPosition(firstItemScrollPosition);
1310         }
1311
1312         RemoveAnimation(mScrollAnimation);
1313
1314         float flickAnimationDuration = mActiveLayout->GetItemFlickAnimationDuration() * max(1.0f, fabsf(firstItemScrollPosition - GetCurrentLayoutPosition(0)));
1315         mScrollAnimation = Animation::New(flickAnimationDuration);
1316         mScrollAnimation.AnimateTo( Property( mScrollPositionObject, ScrollConnector::SCROLL_POSITION ), firstItemScrollPosition, AlphaFunctions::EaseOut );
1317         mScrollAnimation.AnimateTo( Property(self, mPropertyPosition), GetScrollPosition(firstItemScrollPosition, layoutSize), AlphaFunctions::EaseOut );
1318         mScrollAnimation.AnimateTo( Property(self, mPropertyScrollSpeed), 0.0f, AlphaFunctions::EaseOut );
1319
1320         mIsFlicking = true;
1321         // Check whether it has already scrolled to the end
1322         if(fabs(currentLayoutPosition - firstItemScrollPosition) > Math::MACHINE_EPSILON_0)
1323         {
1324           AnimateScrollOvershoot(0.0f);
1325         }
1326       }
1327
1328       // Anchoring may be triggered when there was no swipe
1329       if (!mScrollAnimation)
1330       {
1331         mScrollAnimation = DoAnchoring();
1332       }
1333
1334       // Reset the overshoot if no scroll animation.
1335       if (!mScrollAnimation)
1336       {
1337         mScrollCompletedSignalV2.Emit(GetCurrentScrollPosition());
1338
1339         AnimateScrollOvershoot(0.0f, false);
1340       }
1341     }
1342     break;
1343
1344     case Gesture::Started: // Fall through
1345     {
1346       mTotalPanDisplacement = Vector2::ZERO;
1347     }
1348
1349     case Gesture::Continuing:
1350     {
1351       mScrollDistance = CalculateScrollDistance(gesture.displacement, *mActiveLayout);
1352       mScrollSpeed = Clamp((gesture.GetSpeed() * mActiveLayout->GetScrollSpeedFactor() * MILLISECONDS_PER_SECONDS), 0.0f, mActiveLayout->GetMaximumSwipeSpeed());
1353
1354       // Refresh order depends on the direction of the scroll; negative is towards the last item.
1355       mRefreshOrderHint = mScrollDistance < 0.0f;
1356
1357       RemoveAnimation(mScrollSpeedAnimation);
1358       mScrollSpeedAnimation = Animation::New(0.3f);
1359       mScrollSpeedAnimation.AnimateTo( Property(self, mPropertyScrollSpeed), mScrollSpeed, AlphaFunctions::Linear );
1360       mScrollSpeedAnimation.Play();
1361
1362       float layoutPositionDelta = GetCurrentLayoutPosition(0) + (mScrollDistance * mActiveLayout->GetScrollSpeedFactor());
1363
1364       float firstItemScrollPosition = ClampFirstItemPosition(layoutPositionDelta, layoutSize, *mActiveLayout);
1365
1366       mScrollPositionObject.SetProperty( ScrollConnector::SCROLL_POSITION, firstItemScrollPosition );
1367       self.SetProperty(mPropertyPosition, GetScrollPosition(firstItemScrollPosition, layoutSize));
1368       mScrollStartedSignalV2.Emit(GetCurrentScrollPosition());
1369
1370       mTotalPanDisplacement += gesture.displacement;
1371       mScrollOvershoot = layoutPositionDelta - firstItemScrollPosition;
1372       if( mScrollOvershoot > Math::MACHINE_EPSILON_1 )
1373       {
1374         AnimateScrollOvershoot(1.0f);
1375       }
1376       else if( mScrollOvershoot < -Math::MACHINE_EPSILON_1 )
1377       {
1378         AnimateScrollOvershoot(-1.0f);
1379       }
1380       else
1381       {
1382         AnimateScrollOvershoot(0.0f);
1383       }
1384     }
1385     break;
1386
1387     case Gesture::Cancelled:
1388     {
1389       mScrollAnimation = DoAnchoring();
1390     }
1391     break;
1392
1393     default:
1394       break;
1395   }
1396
1397   if (mScrollAnimation)
1398   {
1399     mScrollAnimation.FinishedSignal().Connect(this, &ItemView::OnScrollFinished);
1400     mScrollAnimation.Play();
1401   }
1402 }
1403
1404 bool ItemView::OnAccessibilityPan(PanGesture gesture)
1405 {
1406   OnPan(gesture);
1407   return true;
1408 }
1409
1410 Actor ItemView::GetNextKeyboardFocusableActor(Actor actor, Control::KeyboardFocusNavigationDirection direction, bool loopEnabled)
1411 {
1412   Actor nextFocusActor;
1413   if(mActiveLayout)
1414   {
1415     int nextItemID = 0;
1416     if(!actor || actor == this->Self())
1417     {
1418       nextFocusActor = GetItem(nextItemID);
1419     }
1420     else if(actor && actor.GetParent() == this->Self())
1421     {
1422       int itemID = GetItemId(actor);
1423       nextItemID = mActiveLayout->GetNextFocusItemID(itemID, mItemFactory.GetNumberOfItems(), direction, loopEnabled);
1424       nextFocusActor = GetItem(nextItemID);
1425       if(nextFocusActor == actor)
1426       {
1427         // need to pass NULL actor back to focus manager
1428         nextFocusActor.Reset();
1429         return nextFocusActor;
1430       }
1431     }
1432     float layoutPosition = mActiveLayout->GetClosestAnchorPosition( GetCurrentLayoutPosition(0) );
1433     Vector3 layoutSize = Self().GetCurrentSize();
1434     if(!nextFocusActor)
1435     {
1436       // likely the current item is not buffered, so not in our item pool, probably best to get first viewable item
1437       ItemRange viewableItems = mActiveLayout->GetItemsWithinArea(layoutPosition, layoutSize);
1438       nextItemID = viewableItems.begin;
1439       nextFocusActor = GetItem(nextItemID);
1440     }
1441   }
1442   return nextFocusActor;
1443 }
1444
1445 void ItemView::OnKeyboardFocusChangeCommitted(Actor commitedFocusableActor)
1446 {
1447   // only in this function if our chosen focus actor was actually used
1448   if(commitedFocusableActor)
1449   {
1450     int nextItemID = GetItemId(commitedFocusableActor);
1451     float layoutPosition = GetCurrentLayoutPosition(0);
1452     Vector3 layoutSize = Self().GetCurrentSize();
1453     Vector3 focusItemPosition = Vector3::ZERO;
1454     ItemLayout::Vector3Function itemPositionConstraint;
1455     if (mActiveLayout->GetPositionConstraint(nextItemID, itemPositionConstraint))
1456     {
1457       focusItemPosition = itemPositionConstraint(Vector3::ZERO, layoutPosition + nextItemID, 0.0f, layoutSize);
1458     }
1459
1460     float scrollTo = mActiveLayout->GetClosestOnScreenLayoutPosition(nextItemID, layoutPosition, layoutSize);
1461     ScrollTo(Vector3(0.0f, scrollTo, 0.0f), DEFAULT_KEYBOARD_FOCUS_SCROLL_DURATION);
1462   }
1463 }
1464
1465 Animation ItemView::DoAnchoring()
1466 {
1467   Animation anchoringAnimation;
1468   Actor self = Self();
1469
1470   if (mActiveLayout && mAnchoringEnabled)
1471   {
1472     float anchorPosition = mActiveLayout->GetClosestAnchorPosition( GetCurrentLayoutPosition(0) );
1473
1474     anchoringAnimation = Animation::New(mAnchoringDuration);
1475     anchoringAnimation.AnimateTo( Property( mScrollPositionObject, ScrollConnector::SCROLL_POSITION ), anchorPosition, AlphaFunctions::EaseOut );
1476     anchoringAnimation.AnimateTo( Property(self, mPropertyPosition), GetScrollPosition(anchorPosition, self.GetCurrentSize()), AlphaFunctions::EaseOut );
1477     anchoringAnimation.AnimateTo( Property(self, mPropertyScrollSpeed), 0.0f, AlphaFunctions::EaseOut );
1478     if(!mIsFlicking)
1479     {
1480       AnimateScrollOvershoot(0.0f);
1481     }
1482   }
1483
1484   return anchoringAnimation;
1485 }
1486
1487 void ItemView::OnScrollFinished(Animation& source)
1488 {
1489   Actor self = Self();
1490
1491   RemoveAnimation(mScrollAnimation); // mScrollAnimation is used to query whether we're scrolling
1492
1493   mScrollCompletedSignalV2.Emit(GetCurrentScrollPosition());
1494
1495   if(mIsFlicking && fabsf(mScrollOvershoot) > Math::MACHINE_EPSILON_1)
1496   {
1497     AnimateScrollOvershoot( mScrollOvershoot > 0.0f ? 1.0f : -1.0f, true);
1498   }
1499   else
1500   {
1501     // Reset the overshoot
1502     AnimateScrollOvershoot( 0.0f );
1503   }
1504   mIsFlicking = false;
1505
1506   mScrollOvershoot = 0.0f;
1507 }
1508
1509 void ItemView::OnOvershootOnFinished(Animation& animation)
1510 {
1511   mAnimatingOvershootOn = false;
1512   mScrollOvershootAnimation.FinishedSignal().Disconnect(this, &ItemView::OnOvershootOnFinished);
1513   RemoveAnimation(mScrollOvershootAnimation);
1514   if(mAnimateOvershootOff)
1515   {
1516     AnimateScrollOvershoot(0.0f);
1517   }
1518 }
1519
1520 void ItemView::ScrollToItem(unsigned int itemId, float durationSeconds)
1521 {
1522   Actor self = Self();
1523   const Vector3 layoutSize = Self().GetCurrentSize();
1524   float firstItemScrollPosition = ClampFirstItemPosition(mActiveLayout->GetItemScrollToPosition(itemId), layoutSize, *mActiveLayout);
1525
1526   if(durationSeconds > 0.0f)
1527   {
1528     RemoveAnimation(mScrollAnimation);
1529     mScrollAnimation = Animation::New(durationSeconds);
1530     mScrollAnimation.AnimateTo( Property( mScrollPositionObject, ScrollConnector::SCROLL_POSITION ), firstItemScrollPosition, AlphaFunctions::EaseOut );
1531     mScrollAnimation.AnimateTo( Property(self, mPropertyPosition), GetScrollPosition(firstItemScrollPosition, layoutSize), AlphaFunctions::EaseOut );
1532     mScrollAnimation.FinishedSignal().Connect(this, &ItemView::OnScrollFinished);
1533     mScrollAnimation.Play();
1534   }
1535   else
1536   {
1537     mScrollPositionObject.SetProperty( ScrollConnector::SCROLL_POSITION, firstItemScrollPosition );
1538     AnimateScrollOvershoot(0.0f);
1539   }
1540
1541   mScrollStartedSignalV2.Emit(GetCurrentScrollPosition());
1542 }
1543
1544 void ItemView::RemoveAnimation(Animation& animation)
1545 {
1546   if(animation)
1547   {
1548     // Cease animating, and reset handle.
1549     animation.Clear();
1550     animation.Reset();
1551   }
1552 }
1553
1554 void ItemView::CalculateDomainSize(const Vector3& layoutSize)
1555 {
1556   Actor self = Self();
1557
1558   Vector3 firstItemPosition(Vector3::ZERO);
1559   Vector3 lastItemPosition(Vector3::ZERO);
1560
1561   if(mActiveLayout)
1562   {
1563     ItemLayout::Vector3Function firstItemPositionConstraint;
1564     if (mActiveLayout->GetPositionConstraint(0, firstItemPositionConstraint))
1565     {
1566       firstItemPosition = firstItemPositionConstraint(Vector3::ZERO, 0, 0.0f, layoutSize);
1567     }
1568
1569     float minLayoutPosition = mActiveLayout->GetMinimumLayoutPosition(mItemFactory.GetNumberOfItems(), layoutSize);
1570     self.SetProperty(mPropertyMinimumLayoutPosition, minLayoutPosition);
1571
1572     ItemLayout::Vector3Function lastItemPositionConstraint;
1573     if (mActiveLayout->GetPositionConstraint(fabs(minLayoutPosition), lastItemPositionConstraint))
1574     {
1575       lastItemPosition = lastItemPositionConstraint(Vector3::ZERO, fabs(minLayoutPosition), 0.0f, layoutSize);
1576     }
1577
1578     float domainSize;
1579
1580     if(IsHorizontal(mActiveLayout->GetOrientation()))
1581     {
1582       self.SetProperty(mPropertyPositionMin, Vector3(0.0f, firstItemPosition.x, 0.0f));
1583       self.SetProperty(mPropertyPositionMax, Vector3(0.0f, lastItemPosition.x, 0.0f));
1584       domainSize = fabs(firstItemPosition.x - lastItemPosition.x);
1585     }
1586     else
1587     {
1588       self.SetProperty(mPropertyPositionMin, Vector3(0.0f, firstItemPosition.y, 0.0f));
1589       self.SetProperty(mPropertyPositionMax, Vector3(0.0f, lastItemPosition.y, 0.0f));
1590       domainSize = fabs(firstItemPosition.y - lastItemPosition.y);
1591     }
1592
1593     mScrollConnector.SetScrollDomain(minLayoutPosition, 0.0f, domainSize);
1594
1595     bool isLayoutScrollable = IsLayoutScrollable(layoutSize);
1596     self.SetProperty(mPropertyCanScrollVertical, isLayoutScrollable);
1597     self.SetProperty(mPropertyCanScrollHorizontal, false);
1598   }
1599 }
1600
1601 Vector3 ItemView::GetDomainSize() const
1602 {
1603   Actor self = Self();
1604
1605   float minScrollPosition = self.GetProperty<float>(mPropertyPositionMin);
1606   float maxScrollPosition = self.GetProperty<float>(mPropertyPositionMax);
1607
1608   return Vector3(0.0f, fabs(maxScrollPosition - minScrollPosition), 0.0f);
1609 }
1610
1611 bool ItemView::IsLayoutScrollable(const Vector3& layoutSize)
1612 {
1613   Actor self = Self();
1614
1615   float currentLayoutPosition = ClampFirstItemPosition( GetCurrentLayoutPosition(0), layoutSize, *mActiveLayout );
1616   float forwardClampedPosition = ClampFirstItemPosition(currentLayoutPosition + 1.0, layoutSize, *mActiveLayout);
1617   float backwardClampedPosition = ClampFirstItemPosition(currentLayoutPosition - 1.0, layoutSize, *mActiveLayout);
1618
1619   return (fabs(forwardClampedPosition - backwardClampedPosition) > Math::MACHINE_EPSILON_0);
1620 }
1621
1622 float ItemView::GetScrollPosition(float layoutPosition, const Vector3& layoutSize) const
1623 {
1624   Vector3 firstItemPosition(Vector3::ZERO);
1625   ItemLayout::Vector3Function firstItemPositionConstraint;
1626   if (mActiveLayout->GetPositionConstraint(0, firstItemPositionConstraint))
1627   {
1628     firstItemPosition = firstItemPositionConstraint(Vector3::ZERO, layoutPosition, 0.0f, layoutSize);
1629   }
1630
1631   return IsHorizontal(mActiveLayout->GetOrientation()) ? firstItemPosition.x: firstItemPosition.y;
1632 }
1633
1634 Vector3 ItemView::GetCurrentScrollPosition() const
1635 {
1636   float currentLayoutPosition = GetCurrentLayoutPosition(0);
1637   return Vector3(0.0f, GetScrollPosition(currentLayoutPosition, Self().GetCurrentSize()), 0.0f);
1638 }
1639
1640 void ItemView::AddOverlay(Actor actor)
1641 {
1642   Self().Add(actor);
1643 }
1644
1645 void ItemView::RemoveOverlay(Actor actor)
1646 {
1647   Self().Remove(actor);
1648 }
1649
1650 void ItemView::ScrollTo(const Vector3& position, float duration)
1651 {
1652   Actor self = Self();
1653   const Vector3 layoutSize = Self().GetCurrentSize();
1654
1655   float firstItemScrollPosition = ClampFirstItemPosition(position.y, layoutSize, *mActiveLayout);
1656
1657   if(duration > 0.0f)
1658   {
1659     RemoveAnimation(mScrollAnimation);
1660     mScrollAnimation = Animation::New(duration);
1661     mScrollAnimation.AnimateTo( Property( mScrollPositionObject, ScrollConnector::SCROLL_POSITION ), firstItemScrollPosition, AlphaFunctions::EaseOut );
1662     mScrollAnimation.AnimateTo( Property(self, mPropertyPosition), GetScrollPosition(firstItemScrollPosition, layoutSize), AlphaFunctions::EaseOut );
1663     mScrollAnimation.FinishedSignal().Connect(this, &ItemView::OnScrollFinished);
1664     mScrollAnimation.Play();
1665   }
1666   else
1667   {
1668     mScrollPositionObject.SetProperty( ScrollConnector::SCROLL_POSITION, firstItemScrollPosition );
1669     AnimateScrollOvershoot(0.0f);
1670   }
1671
1672   mScrollStartedSignalV2.Emit(GetCurrentScrollPosition());
1673 }
1674
1675 void ItemView::ApplyOvershootOverlayConstraints()
1676 {
1677   Constraint constraint = Constraint::New<float>( Actor::SIZE_WIDTH,
1678                                                     ParentSource( mPropertyScrollDirection ),
1679                                                     Source( mScrollPositionObject, ScrollConnector::OVERSHOOT ),
1680                                                     ParentSource( Actor::SIZE ),
1681                                                     OvershootOverlaySizeConstraint() );
1682   mOvershootOverlay.ApplyConstraint(constraint);
1683   mOvershootOverlay.SetSize(OVERSHOOT_BOUNCE_IMAGE_1_PIXEL_AREA.width, OVERSHOOT_BOUNCE_IMAGE_1_PIXEL_AREA.height);
1684
1685   constraint = Constraint::New<Quaternion>( Actor::ROTATION,
1686                                             ParentSource( mPropertyScrollDirection ),
1687                                             Source( mScrollPositionObject, ScrollConnector::OVERSHOOT ),
1688                                             OvershootOverlayRotationConstraint() );
1689   mOvershootOverlay.ApplyConstraint(constraint);
1690
1691   constraint = Constraint::New<Vector3>( Actor::POSITION,
1692                                          ParentSource( Actor::SIZE ),
1693                                          ParentSource( mPropertyScrollDirection ),
1694                                          Source( mScrollPositionObject, ScrollConnector::OVERSHOOT ),
1695                                          OvershootOverlayPositionConstraint() );
1696   mOvershootOverlay.ApplyConstraint(constraint);
1697
1698   constraint = Constraint::New<bool>( Actor::VISIBLE,
1699                                       ParentSource( mPropertyCanScrollVertical ),
1700                                       OvershootOverlayVisibilityConstraint() );
1701   mOvershootOverlay.ApplyConstraint(constraint);
1702
1703   int effectOvershootPropertyIndex = mOvershootEffect.GetPropertyIndex(mOvershootEffect.GetOvershootPropertyName());
1704   Actor self = Self();
1705   constraint = Constraint::New<float>( effectOvershootPropertyIndex,
1706                                        Source( mScrollPositionObject, ScrollConnector::OVERSHOOT ),
1707                                        EqualToConstraint() );
1708   mOvershootEffect.ApplyConstraint(constraint);
1709 }
1710
1711 float ItemView::CalculateScrollOvershoot()
1712 {
1713   float overshoot = 0.0f;
1714
1715   if(mActiveLayout)
1716   {
1717     // The overshoot must be calculated from the accumulated pan gesture displacement
1718     // since the pan gesture starts.
1719     Actor self = Self();
1720     float scrollDistance = CalculateScrollDistance(mTotalPanDisplacement, *mActiveLayout) * mActiveLayout->GetScrollSpeedFactor();
1721     float positionDelta = GetCurrentLayoutPosition(0) + scrollDistance;
1722     float minLayoutPosition = mActiveLayout->GetMinimumLayoutPosition(mItemFactory.GetNumberOfItems(), Self().GetCurrentSize());
1723     self.SetProperty(mPropertyMinimumLayoutPosition, minLayoutPosition);
1724     float clamppedPosition = min(0.0f, max(minLayoutPosition, positionDelta));
1725     overshoot = positionDelta - clamppedPosition;
1726   }
1727
1728   return overshoot;
1729 }
1730
1731 void ItemView::AnimateScrollOvershoot(float overshootAmount, bool animateBack)
1732 {
1733   bool animatingOn = fabsf(overshootAmount) > Math::MACHINE_EPSILON_1;
1734
1735   // make sure we animate back if needed
1736   mAnimateOvershootOff = animateBack || (!animatingOn && mAnimatingOvershootOn);
1737
1738   if( mAnimatingOvershootOn )
1739   {
1740     // animating on, do not allow animate off
1741     return;
1742   }
1743
1744   Actor self = Self();
1745   float currentOvershoot = mScrollPositionObject.GetProperty<float>(ScrollConnector::OVERSHOOT);
1746   float duration = DEFAULT_OVERSHOOT_ANIMATION_DURATION * (animatingOn ? (1.0f - fabsf(currentOvershoot)) : fabsf(currentOvershoot));
1747
1748   RemoveAnimation(mScrollOvershootAnimation);
1749   mScrollOvershootAnimation = Animation::New(duration);
1750   mScrollOvershootAnimation.FinishedSignal().Connect(this, &ItemView::OnOvershootOnFinished);
1751   mScrollOvershootAnimation.AnimateTo( Property(mScrollPositionObject, ScrollConnector::OVERSHOOT), overshootAmount, TimePeriod(0.0f, duration) );
1752   mScrollOvershootAnimation.Play();
1753
1754   mAnimatingOvershootOn = animatingOn;
1755 }
1756
1757 } // namespace Internal
1758
1759 } // namespace Toolkit
1760
1761 } // namespace Dali