dali-toolkit/internal/controls/image-view/image-view-impl.cpp

   1 /*
   2  * Copyright (c) 2021 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 // CLASS HEADER
  19 #include "image-view-impl.h"
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/devel-api/scripting/scripting.h>
  23 #include <dali/public-api/object/type-registry-helper.h>
  24 #include <dali/public-api/object/type-registry.h>
  25
  26 // INTERNAL INCLUDES
  27 #include <dali-toolkit/devel-api/controls/control-devel.h>
  28 #include <dali-toolkit/devel-api/visual-factory/visual-factory.h>
  29 #include <dali-toolkit/internal/controls/control/control-data-impl.h>
  30 #include <dali-toolkit/internal/visuals/visual-base-data-impl.h>
  31 #include <dali-toolkit/internal/visuals/visual-base-impl.h>
  32 #include <dali-toolkit/internal/visuals/visual-string-constants.h>
  33 #include <dali-toolkit/public-api/controls/image-view/image-view.h>
  34 #include <dali-toolkit/public-api/visuals/visual-properties.h>
  35
  36 namespace Dali
  37 {
  38 namespace Toolkit
  39 {
  40 namespace Internal
  41 {
  42 namespace
  43 {
  44 const Vector4 FULL_TEXTURE_RECT(0.f, 0.f, 1.f, 1.f);
  45
  46 BaseHandle Create()
  47 {
  48   return Toolkit::ImageView::New();
  49 }
  50
  51 // Setup properties, signals and actions using the type-registry.
  52 DALI_TYPE_REGISTRATION_BEGIN(Toolkit::ImageView, Toolkit::Control, Create);
  53 DALI_PROPERTY_REGISTRATION(Toolkit, ImageView, "image", MAP, IMAGE)
  54 DALI_PROPERTY_REGISTRATION(Toolkit, ImageView, "preMultipliedAlpha", BOOLEAN, PRE_MULTIPLIED_ALPHA)
  55
  56 DALI_ANIMATABLE_PROPERTY_REGISTRATION_WITH_DEFAULT(Toolkit, ImageView, "pixelArea", Vector4(0.f, 0.f, 1.f, 1.f), PIXEL_AREA)
  57 DALI_TYPE_REGISTRATION_END()
  58
  59 } // anonymous namespace
  60
  61 using namespace Dali;
  62
  63 ImageView::ImageView()
  64 : Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT)),
  65   mImageSize(),
  66   mImageVisualPaddingSetByTransform(false),
  67   mImageViewPixelAreaSetByFittingMode(false)
  68 {
  69 }
  70
  71 ImageView::~ImageView()
  72 {
  73 }
  74
  75 Toolkit::ImageView ImageView::New()
  76 {
  77   ImageView* impl = new ImageView();
  78
  79   Toolkit::ImageView handle = Toolkit::ImageView(*impl);
  80
  81   // Second-phase init of the implementation
  82   // This can only be done after the CustomActor connection has been made...
  83   impl->Initialize();
  84
  85   return handle;
  86 }
  87
  88 /////////////////////////////////////////////////////////////
  89
  90 void ImageView::OnInitialize()
  91 {
  92   // ImageView can relayout in the OnImageReady, alternative to a signal would be to have a upcall from the Control to ImageView
  93   Dali::Toolkit::Control handle(GetOwner());
  94   handle.ResourceReadySignal().Connect(this, &ImageView::OnResourceReady);
  95
  96   DevelControl::SetAccessibilityConstructor(Self(), [](Dali::Actor actor) {
  97     return std::unique_ptr<Dali::Accessibility::Accessible>(
  98       new DevelControl::AccessibleImpl(actor, Dali::Accessibility::Role::IMAGE));
  99   });
 100 }
 101
 102 void ImageView::SetImage(const Property::Map& map)
 103 {
 104   // Comparing a property map is too expensive so just creating a new visual
 105   mPropertyMap = map;
 106   mUrl.clear();
 107
 108   Toolkit::Visual::Base visual = Toolkit::VisualFactory::Get().CreateVisual(mPropertyMap);
 109   if(visual)
 110   {
 111     // Don't set mVisual until it is ready and shown. Getters will still use current visual.
 112     if(!mVisual)
 113     {
 114       mVisual = visual;
 115     }
 116
 117     if(!mShaderMap.Empty())
 118     {
 119       Internal::Visual::Base& visualImpl = Toolkit::GetImplementation(visual);
 120       visualImpl.SetCustomShader(mShaderMap);
 121     }
 122
 123     DevelControl::RegisterVisual(*this, Toolkit::ImageView::Property::IMAGE, visual);
 124   }
 125   else
 126   {
 127     // Unregister the exsiting visual
 128     DevelControl::UnregisterVisual(*this, Toolkit::ImageView::Property::IMAGE);
 129
 130     // Trigger a size negotiation request that may be needed when unregistering a visual.
 131     RelayoutRequest();
 132   }
 133
 134   // Signal that a Relayout may be needed
 135 }
 136
 137 void ImageView::SetImage(const std::string& url, ImageDimensions size)
 138 {
 139   // Don't bother comparing if we had a visual previously, just drop old visual and create new one
 140   mUrl       = url;
 141   mImageSize = size;
 142   mPropertyMap.Clear();
 143
 144   // Don't set mVisual until it is ready and shown. Getters will still use current visual.
 145   Toolkit::Visual::Base visual = Toolkit::VisualFactory::Get().CreateVisual(url, size);
 146   if(visual)
 147   {
 148     if(!mVisual)
 149     {
 150       mVisual = visual;
 151     }
 152
 153     if(!mShaderMap.Empty())
 154     {
 155       Internal::Visual::Base& visualImpl = Toolkit::GetImplementation(visual);
 156       visualImpl.SetCustomShader(mShaderMap);
 157     }
 158
 159     DevelControl::RegisterVisual(*this, Toolkit::ImageView::Property::IMAGE, visual);
 160   }
 161   else
 162   {
 163     // Unregister the exsiting visual
 164     DevelControl::UnregisterVisual(*this, Toolkit::ImageView::Property::IMAGE);
 165
 166     // Trigger a size negotiation request that may be needed when unregistering a visual.
 167     RelayoutRequest();
 168   }
 169
 170   // Signal that a Relayout may be needed
 171 }
 172
 173 void ImageView::EnablePreMultipliedAlpha(bool preMultipled)
 174 {
 175   if(mVisual)
 176   {
 177     Toolkit::GetImplementation(mVisual).EnablePreMultipliedAlpha(preMultipled);
 178   }
 179 }
 180
 181 bool ImageView::IsPreMultipliedAlphaEnabled() const
 182 {
 183   if(mVisual)
 184   {
 185     return Toolkit::GetImplementation(mVisual).IsPreMultipliedAlphaEnabled();
 186   }
 187   return false;
 188 }
 189
 190 void ImageView::SetDepthIndex(int depthIndex)
 191 {
 192   if(mVisual)
 193   {
 194     mVisual.SetDepthIndex(depthIndex);
 195   }
 196 }
 197
 198 Vector3 ImageView::GetNaturalSize()
 199 {
 200   if(mVisual)
 201   {
 202     Vector2 rendererNaturalSize;
 203     mVisual.GetNaturalSize(rendererNaturalSize);
 204
 205     Extents padding;
 206     padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
 207
 208     rendererNaturalSize.width += (padding.start + padding.end);
 209     rendererNaturalSize.height += (padding.top + padding.bottom);
 210     return Vector3(rendererNaturalSize);
 211   }
 212
 213   // if no visual then use Control's natural size
 214   return Control::GetNaturalSize();
 215 }
 216
 217 float ImageView::GetHeightForWidth(float width)
 218 {
 219   Extents padding;
 220   padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
 221
 222   if(mVisual)
 223   {
 224     return mVisual.GetHeightForWidth(width) + padding.top + padding.bottom;
 225   }
 226   else
 227   {
 228     return Control::GetHeightForWidth(width) + padding.top + padding.bottom;
 229   }
 230 }
 231
 232 float ImageView::GetWidthForHeight(float height)
 233 {
 234   Extents padding;
 235   padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
 236
 237   if(mVisual)
 238   {
 239     return mVisual.GetWidthForHeight(height) + padding.start + padding.end;
 240   }
 241   else
 242   {
 243     return Control::GetWidthForHeight(height) + padding.start + padding.end;
 244   }
 245 }
 246
 247 void ImageView::OnRelayout(const Vector2& size, RelayoutContainer& container)
 248 {
 249   Control::OnRelayout(size, container);
 250   if(mVisual)
 251   {
 252     Property::Map transformMap = Property::Map();
 253
 254     Extents padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
 255
 256     bool zeroPadding = (padding == Extents());
 257
 258     Vector2 naturalSize;
 259     mVisual.GetNaturalSize(naturalSize);
 260
 261     Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>(
 262       Self().GetProperty(Dali::Actor::Property::LAYOUT_DIRECTION).Get<int>());
 263     if(Dali::LayoutDirection::RIGHT_TO_LEFT == layoutDirection)
 264     {
 265       std::swap(padding.start, padding.end);
 266     }
 267
 268     // remove padding from the size to know how much is left for the visual
 269     Vector2 finalSize   = size - Vector2(padding.start + padding.end, padding.top + padding.bottom);
 270     Vector2 finalOffset = Vector2(padding.start, padding.top);
 271
 272     ApplyFittingMode(finalSize, naturalSize, finalOffset, zeroPadding, transformMap);
 273
 274     mVisual.SetTransformAndSize(transformMap, size);
 275
 276     // mVisual is not updated util the resource is ready in the case of visual replacement.
 277     // in this case, the Property Map must be initialized so that the previous value is not reused.
 278     // after mVisual is updated, the correct value will be reset.
 279     Toolkit::Visual::Base visual = DevelControl::GetVisual(*this, Toolkit::ImageView::Property::IMAGE);
 280     if(visual && visual != mVisual)
 281     {
 282       visual.SetTransformAndSize(Property::Map(), size);
 283     }
 284   }
 285 }
 286
 287 void ImageView::OnCreateTransitions(Dali::Animation& animation, Dali::Toolkit::Control source, AlphaFunction alphaFunction, TimePeriod timePeriod)
 288 {
 289   Dali::Toolkit::ImageView destinationHandle = Toolkit::ImageView(GetOwner());
 290   Toolkit::Visual::Base    destinationVisual = DevelControl::GetVisual(GetImplementation(destinationHandle), Toolkit::ImageView::Property::IMAGE);
 291   Property::Map            destinationMap;
 292
 293   if(!destinationVisual)
 294   {
 295     return;
 296   }
 297
 298   destinationVisual.CreatePropertyMap(destinationMap);
 299
 300   static auto findValueVector4 = [](const Property::Map& map, Property::Index index, const Vector4& defaultValue = Vector4()) -> Vector4 {
 301     Property::Value* propertyValue = map.Find(index);
 302     if(propertyValue)
 303     {
 304       return propertyValue->Get<Vector4>();
 305     }
 306     return defaultValue;
 307   };
 308
 309   static auto findValueFloat = [](const Property::Map& map, Property::Index index, const float& defaultValue = 0.0f) -> float {
 310     Property::Value* propertyValue = map.Find(index);
 311     if(propertyValue)
 312     {
 313       return propertyValue->Get<float>();
 314     }
 315     return defaultValue;
 316   };
 317
 318   Vector4 sourceMixColor(0.0f, 0.0f, 0.0f, 0.0f);
 319   Vector4 sourceCornerRadius(0.0f, 0.0f, 0.0f, 0.0f);
 320   float   sourceBorderlineWidth(0.0f);
 321   Vector4 sourceBorderlineColor(0.0f, 0.0f, 0.0f, 1.0f);
 322   float   sourceBorderlineOffset(0.0f);
 323   Vector4 destinationMixColor         = findValueVector4(destinationMap, Dali::Toolkit::Visual::Property::MIX_COLOR, sourceMixColor);
 324   Vector4 destinationCornerRadius     = findValueVector4(destinationMap, Toolkit::DevelVisual::Property::CORNER_RADIUS, sourceCornerRadius);
 325   float   destinationBorderlineWidth  = findValueFloat(destinationMap, Toolkit::DevelVisual::Property::BORDERLINE_WIDTH, sourceBorderlineWidth);
 326   Vector4 destinationBorderlineColor  = findValueVector4(destinationMap, Toolkit::DevelVisual::Property::BORDERLINE_COLOR, sourceBorderlineColor);
 327   float   destinationBorderlineOffset = findValueFloat(destinationMap, Toolkit::DevelVisual::Property::BORDERLINE_OFFSET, sourceBorderlineOffset);
 328
 329   Dali::Toolkit::ImageView sourceHandle = Dali::Toolkit::ImageView::DownCast(source);
 330   Toolkit::Visual::Base    sourceVisual;
 331   Property::Map            sourceMap;
 332
 333   if(sourceHandle)
 334   {
 335     sourceVisual = DevelControl::GetVisual(GetImplementation(sourceHandle), Toolkit::ImageView::Property::IMAGE);
 336   }
 337
 338   if(sourceVisual)
 339   {
 340     sourceVisual.CreatePropertyMap(sourceMap);
 341     sourceMixColor         = findValueVector4(sourceMap, Dali::Toolkit::Visual::Property::MIX_COLOR, sourceMixColor);
 342     sourceCornerRadius     = findValueVector4(sourceMap, Toolkit::DevelVisual::Property::CORNER_RADIUS, sourceCornerRadius);
 343     sourceBorderlineWidth  = findValueFloat(sourceMap, Toolkit::DevelVisual::Property::BORDERLINE_WIDTH, sourceBorderlineWidth);
 344     sourceBorderlineColor  = findValueVector4(sourceMap, Toolkit::DevelVisual::Property::BORDERLINE_COLOR, sourceBorderlineColor);
 345     sourceBorderlineOffset = findValueFloat(sourceMap, Toolkit::DevelVisual::Property::BORDERLINE_OFFSET, sourceBorderlineOffset);
 346   }
 347
 348   std::vector<Dali::Property>                              properties;
 349   std::vector<std::pair<Property::Value, Property::Value>> values;
 350
 351   if(Vector3(sourceMixColor) != Vector3(destinationMixColor))
 352   {
 353     properties.push_back(DevelControl::GetVisualProperty(destinationHandle, Toolkit::ImageView::Property::IMAGE, Toolkit::Visual::Property::MIX_COLOR));
 354     values.push_back(std::make_pair(Vector3(sourceMixColor), Vector3(destinationMixColor)));
 355   }
 356   if(std::abs(sourceMixColor.a - destinationMixColor.a) > Math::MACHINE_EPSILON_1)
 357   {
 358     properties.push_back(DevelControl::GetVisualProperty(destinationHandle, Toolkit::ImageView::Property::IMAGE, Toolkit::Visual::Property::OPACITY));
 359     values.push_back(std::make_pair(sourceMixColor.a, destinationMixColor.a));
 360   }
 361   if(sourceCornerRadius != destinationCornerRadius)
 362   {
 363     properties.push_back(DevelControl::GetVisualProperty(destinationHandle, Toolkit::ImageView::Property::IMAGE, Toolkit::DevelVisual::Property::CORNER_RADIUS));
 364     values.push_back(std::make_pair(sourceCornerRadius, destinationCornerRadius));
 365   }
 366   if(sourceBorderlineWidth != destinationBorderlineWidth)
 367   {
 368     properties.push_back(DevelControl::GetVisualProperty(destinationHandle, Toolkit::ImageView::Property::IMAGE, Toolkit::DevelVisual::Property::BORDERLINE_WIDTH));
 369     values.push_back(std::make_pair(sourceBorderlineWidth, destinationBorderlineWidth));
 370   }
 371   if(sourceBorderlineColor != destinationBorderlineColor)
 372   {
 373     properties.push_back(DevelControl::GetVisualProperty(destinationHandle, Toolkit::ImageView::Property::IMAGE, Toolkit::DevelVisual::Property::BORDERLINE_COLOR));
 374     values.push_back(std::make_pair(sourceBorderlineColor, destinationBorderlineColor));
 375   }
 376   if(sourceBorderlineOffset != destinationBorderlineOffset)
 377   {
 378     properties.push_back(DevelControl::GetVisualProperty(destinationHandle, Toolkit::ImageView::Property::IMAGE, Toolkit::DevelVisual::Property::BORDERLINE_OFFSET));
 379     values.push_back(std::make_pair(sourceBorderlineOffset, destinationBorderlineOffset));
 380   }
 381
 382   for(uint32_t i = 0; i < properties.size(); ++i)
 383   {
 384     if(timePeriod.delaySeconds > 0.0f)
 385     {
 386       Dali::KeyFrames initialKeyframes = Dali::KeyFrames::New();
 387       initialKeyframes.Add(0.0f, values[i].first);
 388       initialKeyframes.Add(1.0f, values[i].first);
 389       animation.AnimateBetween(properties[i], initialKeyframes, TimePeriod(timePeriod.delaySeconds));
 390     }
 391     Dali::KeyFrames keyframes = Dali::KeyFrames::New();
 392     keyframes.Add(0.0f, values[i].first);
 393     keyframes.Add(1.0f, values[i].second);
 394     animation.AnimateBetween(properties[i], keyframes, alphaFunction, timePeriod);
 395   }
 396 }
 397
 398 void ImageView::OnResourceReady(Toolkit::Control control)
 399 {
 400   // Visual ready so update visual attached to this ImageView, following call to RelayoutRequest will use this visual.
 401   mVisual = DevelControl::GetVisual(*this, Toolkit::ImageView::Property::IMAGE);
 402   // Signal that a Relayout may be needed
 403 }
 404
 405 void ImageView::SetTransformMapForFittingMode(Vector2 finalSize, Vector2 naturalSize, Vector2 finalOffset, Visual::FittingMode fittingMode, Property::Map& transformMap)
 406 {
 407   switch(fittingMode)
 408   {
 409     case Visual::FittingMode::FIT_KEEP_ASPECT_RATIO:
 410     {
 411       auto availableVisualSize = finalSize;
 412
 413       // scale to fit the padded area
 414       finalSize = naturalSize * std::min((naturalSize.width ? (availableVisualSize.width / naturalSize.width) : 0),
 415                                          (naturalSize.height ? (availableVisualSize.height / naturalSize.height) : 0));
 416
 417       // calculate final offset within the padded area
 418       finalOffset += (availableVisualSize - finalSize) * .5f;
 419
 420       // populate the transform map
 421       transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, finalOffset)
 422         .Add(Toolkit::Visual::Transform::Property::SIZE, finalSize);
 423       break;
 424     }
 425     case Visual::FittingMode::OVER_FIT_KEEP_ASPECT_RATIO:
 426     {
 427       mImageViewPixelAreaSetByFittingMode = true;
 428       auto availableVisualSize            = finalSize;
 429       finalSize                           = naturalSize * std::max((naturalSize.width ? (availableVisualSize.width / naturalSize.width) : 0),
 430                                          (naturalSize.height ? (availableVisualSize.height / naturalSize.height) : 0));
 431
 432       auto originalOffset = finalOffset;
 433       finalOffset += (availableVisualSize - finalSize) * .5f;
 434
 435       float   x           = abs((availableVisualSize.width - finalSize.width) / finalSize.width) * .5f;
 436       float   y           = abs((availableVisualSize.height - finalSize.height) / finalSize.height) * .5f;
 437       float   widthRatio  = 1.f - abs((availableVisualSize.width - finalSize.width) / finalSize.width);
 438       float   heightRatio = 1.f - abs((availableVisualSize.height - finalSize.height) / finalSize.height);
 439       Vector4 pixelArea   = Vector4(x, y, widthRatio, heightRatio);
 440       Self().SetProperty(Toolkit::ImageView::Property::PIXEL_AREA, pixelArea);
 441
 442       // populate the transform map
 443       transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, originalOffset)
 444         .Add(Toolkit::Visual::Transform::Property::SIZE, availableVisualSize);
 445       break;
 446     }
 447     case Visual::FittingMode::CENTER:
 448     {
 449       auto availableVisualSize = finalSize;
 450       if(availableVisualSize.width > naturalSize.width && availableVisualSize.height > naturalSize.height)
 451       {
 452         finalSize = naturalSize;
 453       }
 454       else
 455       {
 456         finalSize = naturalSize * std::min((naturalSize.width ? (availableVisualSize.width / naturalSize.width) : 0),
 457                                            (naturalSize.height ? (availableVisualSize.height / naturalSize.height) : 0));
 458       }
 459
 460       finalOffset += (availableVisualSize - finalSize) * .5f;
 461
 462       // populate the transform map
 463       transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, finalOffset)
 464         .Add(Toolkit::Visual::Transform::Property::SIZE, finalSize);
 465       break;
 466     }
 467     case Visual::FittingMode::FILL:
 468     {
 469       transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, finalOffset)
 470         .Add(Toolkit::Visual::Transform::Property::SIZE, finalSize);
 471       break;
 472     }
 473     case Visual::FittingMode::FIT_WIDTH:
 474     case Visual::FittingMode::FIT_HEIGHT:
 475     {
 476       // This FittingMode already converted
 477       break;
 478     }
 479   }
 480 }
 481
 482 void ImageView::ApplyFittingMode(Vector2 finalSize, Vector2 naturalSize, Vector2 finalOffset, bool zeroPadding, Property::Map& transformMap)
 483 {
 484   Visual::FittingMode fittingMode = Toolkit::GetImplementation(mVisual).GetFittingMode();
 485
 486   // Reset PIXEL_AREA after using OVER_FIT_KEEP_ASPECT_RATIO
 487   if(mImageViewPixelAreaSetByFittingMode)
 488   {
 489     Self().SetProperty(Toolkit::ImageView::Property::PIXEL_AREA, FULL_TEXTURE_RECT);
 490     mImageViewPixelAreaSetByFittingMode = false;
 491   }
 492
 493   if((!zeroPadding) || // If padding is not zero
 494      (fittingMode != Visual::FittingMode::FILL))
 495   {
 496     mImageVisualPaddingSetByTransform = true;
 497
 498     // If FittingMode use FIT_WIDTH or FIT_HEIGTH, it need to change proper fittingMode
 499     if(fittingMode == Visual::FittingMode::FIT_WIDTH)
 500     {
 501       fittingMode = (finalSize.height / naturalSize.height) < (finalSize.width / naturalSize.width) ? Visual::FittingMode::OVER_FIT_KEEP_ASPECT_RATIO : Visual::FittingMode::FIT_KEEP_ASPECT_RATIO;
 502     }
 503     else if(fittingMode == Visual::FittingMode::FIT_HEIGHT)
 504     {
 505       fittingMode = (finalSize.height / naturalSize.height) < (finalSize.width / naturalSize.width) ? Visual::FittingMode::FIT_KEEP_ASPECT_RATIO : Visual::FittingMode::OVER_FIT_KEEP_ASPECT_RATIO;
 506     }
 507
 508     SetTransformMapForFittingMode(finalSize, naturalSize, finalOffset, fittingMode, transformMap);
 509
 510     // Set extra value for applying transformMap
 511     transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET_POLICY,
 512                      Vector2(Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE))
 513       .Add(Toolkit::Visual::Transform::Property::ORIGIN, Toolkit::Align::TOP_BEGIN)
 514       .Add(Toolkit::Visual::Transform::Property::ANCHOR_POINT, Toolkit::Align::TOP_BEGIN)
 515       .Add(Toolkit::Visual::Transform::Property::SIZE_POLICY,
 516            Vector2(Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE));
 517   }
 518   else if(mImageVisualPaddingSetByTransform && zeroPadding) // Reset offset to zero only if padding applied previously
 519   {
 520     mImageVisualPaddingSetByTransform = false;
 521     // Reset the transform map
 522     transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, Vector2::ZERO)
 523       .Add(Toolkit::Visual::Transform::Property::OFFSET_POLICY,
 524            Vector2(Toolkit::Visual::Transform::Policy::RELATIVE, Toolkit::Visual::Transform::Policy::RELATIVE))
 525       .Add(Toolkit::Visual::Transform::Property::SIZE, Vector2::ONE)
 526       .Add(Toolkit::Visual::Transform::Property::SIZE_POLICY,
 527            Vector2(Toolkit::Visual::Transform::Policy::RELATIVE, Toolkit::Visual::Transform::Policy::RELATIVE));
 528   }
 529 }
 530
 531 ///////////////////////////////////////////////////////////
 532 //
 533 // Properties
 534 //
 535
 536 void ImageView::SetProperty(BaseObject* object, Property::Index index, const Property::Value& value)
 537 {
 538   Toolkit::ImageView imageView = Toolkit::ImageView::DownCast(Dali::BaseHandle(object));
 539
 540   if(imageView)
 541   {
 542     ImageView& impl = GetImpl(imageView);
 543     switch(index)
 544     {
 545       case Toolkit::ImageView::Property::IMAGE:
 546       {
 547         std::string          imageUrl;
 548         const Property::Map* map;
 549         if(value.Get(imageUrl))
 550         {
 551           impl.SetImage(imageUrl, ImageDimensions());
 552         }
 553         // if its not a string then get a Property::Map from the property if possible.
 554         else
 555         {
 556           map = value.GetMap();
 557           if(map)
 558           {
 559             Property::Value* shaderValue = map->Find(Toolkit::Visual::Property::SHADER, CUSTOM_SHADER);
 560             // set image only if property map contains image information other than custom shader
 561             if(map->Count() > 1u || !shaderValue)
 562             {
 563               impl.SetImage(*map);
 564             }
 565             // the property map contains only the custom shader
 566             else if((map->Count() == 1u) && (shaderValue))
 567             {
 568               Property::Map* shaderMap = shaderValue->GetMap();
 569               if(shaderMap)
 570               {
 571                 impl.mShaderMap = *shaderMap;
 572
 573                 if(!impl.mUrl.empty())
 574                 {
 575                   impl.SetImage(impl.mUrl, impl.mImageSize);
 576                 }
 577                 else if(!impl.mPropertyMap.Empty())
 578                 {
 579                   impl.SetImage(impl.mPropertyMap);
 580                 }
 581               }
 582             }
 583           }
 584         }
 585         break;
 586       }
 587
 588       case Toolkit::ImageView::Property::PRE_MULTIPLIED_ALPHA:
 589       {
 590         bool isPre;
 591         if(value.Get(isPre))
 592         {
 593           impl.EnablePreMultipliedAlpha(isPre);
 594         }
 595         break;
 596       }
 597     }
 598   }
 599 }
 600
 601 Property::Value ImageView::GetProperty(BaseObject* object, Property::Index propertyIndex)
 602 {
 603   Property::Value value;
 604
 605   Toolkit::ImageView imageview = Toolkit::ImageView::DownCast(Dali::BaseHandle(object));
 606
 607   if(imageview)
 608   {
 609     ImageView& impl = GetImpl(imageview);
 610     switch(propertyIndex)
 611     {
 612       case Toolkit::ImageView::Property::IMAGE:
 613       {
 614         if(!impl.mUrl.empty())
 615         {
 616           value = impl.mUrl;
 617         }
 618         else
 619         {
 620           Property::Map         map;
 621           Toolkit::Visual::Base visual = DevelControl::GetVisual(impl, Toolkit::ImageView::Property::IMAGE);
 622           if(visual)
 623           {
 624             visual.CreatePropertyMap(map);
 625           }
 626           value = map;
 627         }
 628         break;
 629       }
 630
 631       case Toolkit::ImageView::Property::PRE_MULTIPLIED_ALPHA:
 632       {
 633         value = impl.IsPreMultipliedAlphaEnabled();
 634         break;
 635       }
 636     }
 637   }
 638
 639   return value;
 640 }
 641
 642 } // namespace Internal
 643 } // namespace Toolkit
 644 } // namespace Dali