2 * Copyright (c) 2023 Samsung Electronics Co., Ltd.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include "image-view-impl.h"
22 #include <dali/devel-api/scripting/scripting.h>
23 #include <dali/public-api/math/math-utils.h>
24 #include <dali/public-api/object/type-registry-helper.h>
25 #include <dali/public-api/object/type-registry.h>
28 #include <dali-toolkit/devel-api/controls/control-devel.h>
29 #include <dali-toolkit/devel-api/visual-factory/visual-factory.h>
30 #include <dali-toolkit/devel-api/visuals/visual-actions-devel.h>
31 #include <dali-toolkit/internal/controls/control/control-data-impl.h>
32 #include <dali-toolkit/internal/visuals/visual-base-data-impl.h>
33 #include <dali-toolkit/internal/visuals/visual-base-impl.h>
34 #include <dali-toolkit/internal/visuals/visual-string-constants.h>
35 #include <dali-toolkit/public-api/controls/image-view/image-view.h>
36 #include <dali-toolkit/public-api/visuals/visual-properties.h>
46 const Vector4 FULL_TEXTURE_RECT(0.f, 0.f, 1.f, 1.f);
48 constexpr float FULL_OPACITY = 1.0f;
49 constexpr float LOW_OPACITY = 0.2f;
50 constexpr float TRANSITION_EFFECT_SPEED = 0.3f;
52 constexpr int PLACEHOLDER_DEPTH_INDEX = -2;
53 constexpr int PREVIOUS_VISUAL_DEPTH_INDEX = -1;
54 constexpr int CURRENT_VISUAL_DEPTH_INDEX = 0;
58 return Toolkit::ImageView::New();
61 // Setup properties, signals and actions using the type-registry.
62 DALI_TYPE_REGISTRATION_BEGIN(Toolkit::ImageView, Toolkit::Control, Create);
63 DALI_PROPERTY_REGISTRATION(Toolkit, ImageView, "image", MAP, IMAGE)
64 DALI_PROPERTY_REGISTRATION(Toolkit, ImageView, "preMultipliedAlpha", BOOLEAN, PRE_MULTIPLIED_ALPHA)
65 DALI_PROPERTY_REGISTRATION(Toolkit, ImageView, "placeholderImage", STRING, PLACEHOLDER_IMAGE)
66 DALI_PROPERTY_REGISTRATION(Toolkit, ImageView, "enableTransitionEffect", BOOLEAN, ENABLE_TRANSITION_EFFECT)
67 DALI_ANIMATABLE_PROPERTY_REGISTRATION_WITH_DEFAULT(Toolkit, ImageView, "pixelArea", Vector4(0.f, 0.f, 1.f, 1.f), PIXEL_AREA)
68 DALI_TYPE_REGISTRATION_END()
70 } // anonymous namespace
74 ImageView::ImageView(ControlBehaviour additionalBehaviour)
75 : Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT | additionalBehaviour)),
77 mTransitionTargetAlpha(FULL_OPACITY),
78 mImageVisualPaddingSetByTransform(false),
79 mImageViewPixelAreaSetByFittingMode(false),
80 mTransitionEffect(false),
81 mNeedLazyFittingMode(false),
86 ImageView::~ImageView()
90 Toolkit::ImageView ImageView::New(ControlBehaviour additionalBehaviour)
92 ImageView* impl = new ImageView(additionalBehaviour);
94 Toolkit::ImageView handle = Toolkit::ImageView(*impl);
96 // Second-phase init of the implementation
97 // This can only be done after the CustomActor connection has been made...
103 /////////////////////////////////////////////////////////////
105 void ImageView::OnInitialize()
107 // ImageView can relayout in the OnImageReady, alternative to a signal would be to have a upcall from the Control to ImageView
108 Dali::Toolkit::Control handle(GetOwner());
109 handle.ResourceReadySignal().Connect(this, &ImageView::OnResourceReady);
111 Self().SetProperty(DevelControl::Property::ACCESSIBILITY_ROLE, Dali::Accessibility::Role::IMAGE);
114 void ImageView::SetImage(const Property::Map& map)
116 if(mTransitionEffect && mVisual)
118 // Clear previous transition effect if it is playing
121 if(mTransitionAnimation)
123 if(mTransitionAnimation.GetState() == Animation::PLAYING)
126 HidePlaceholderImage();
127 ClearTransitionAnimation();
132 // Enable transition effect for previous visual.
133 // This previous visual will be deleted when transition effect is done.
134 Internal::Control::Impl& controlDataImpl = Internal::Control::Impl::Get(*this);
135 controlDataImpl.EnableReadyTransitionOverriden(mVisual, true);
136 mPreviousVisual = mVisual;
139 // Comparing a property map is too expensive so just creating a new visual
143 mImageReplaced = true;
145 // keep alpha for transition effect
146 if(mTransitionEffect)
148 float alpha = FULL_OPACITY;
149 Property::Value* alphaValue = map.Find(Toolkit::Visual::Property::OPACITY);
150 if(alphaValue && alphaValue->Get(alpha))
152 mTransitionTargetAlpha = alpha;
158 ShowPlaceholderImage();
161 Toolkit::Visual::Base visual = Toolkit::VisualFactory::Get().CreateVisual(mPropertyMap);
164 // Don't set mVisual until it is ready and shown. Getters will still use current visual.
170 if(!mShaderMap.Empty())
172 Internal::Visual::Base& visualImpl = Toolkit::GetImplementation(visual);
173 visualImpl.SetCustomShader(mShaderMap);
176 DevelControl::RegisterVisual(*this, Toolkit::ImageView::Property::IMAGE, visual);
180 // Unregister the exsiting visual
181 DevelControl::UnregisterVisual(*this, Toolkit::ImageView::Property::IMAGE);
183 // Trigger a size negotiation request that may be needed when unregistering a visual.
186 // Signal that a Relayout may be needed
189 void ImageView::SetImage(const std::string& url, ImageDimensions size)
191 if(mTransitionEffect && mVisual)
193 // Clear previous transition effect if it is playing
196 if(mTransitionAnimation)
198 if(mTransitionAnimation.GetState() == Animation::PLAYING)
200 HidePlaceholderImage();
201 ClearTransitionAnimation();
206 // Enable transition effect for previous visual.
207 // This previous visual will be deleted when transition effect is done.
208 Internal::Control::Impl& controlDataImpl = Internal::Control::Impl::Get(*this);
209 controlDataImpl.EnableReadyTransitionOverriden(mVisual, true);
210 mPreviousVisual = mVisual;
215 // Don't bother comparing if we had a visual previously, just drop old visual and create new one
218 mPropertyMap.Clear();
220 mImageReplaced = true;
224 ShowPlaceholderImage();
227 // Don't set mVisual until it is ready and shown. Getters will still use current visual.
228 Toolkit::Visual::Base visual = Toolkit::VisualFactory::Get().CreateVisual(url, size);
236 if(!mShaderMap.Empty())
238 Internal::Visual::Base& visualImpl = Toolkit::GetImplementation(visual);
239 visualImpl.SetCustomShader(mShaderMap);
242 DevelControl::RegisterVisual(*this, Toolkit::ImageView::Property::IMAGE, visual);
246 // Unregister the exsiting visual
247 DevelControl::UnregisterVisual(*this, Toolkit::ImageView::Property::IMAGE);
249 // Trigger a size negotiation request that may be needed when unregistering a visual.
252 // Signal that a Relayout may be needed
255 void ImageView::ClearImageVisual()
257 // Clear cached properties
258 mPropertyMap.Clear();
262 // Unregister the exsiting visual
263 DevelControl::UnregisterVisual(*this, Toolkit::ImageView::Property::IMAGE);
265 // Trigger a size negotiation request that may be needed when unregistering a visual.
269 void ImageView::EnablePreMultipliedAlpha(bool preMultipled)
273 Toolkit::GetImplementation(mVisual).EnablePreMultipliedAlpha(preMultipled);
277 bool ImageView::IsPreMultipliedAlphaEnabled() const
281 return Toolkit::GetImplementation(mVisual).IsPreMultipliedAlphaEnabled();
286 void ImageView::SetDepthIndex(int depthIndex)
290 mVisual.SetDepthIndex(depthIndex);
294 void ImageView::SetPlaceholderUrl(const std::string& url)
296 mPlaceholderUrl = url;
299 mPlaceholderVisual.Reset();
300 CreatePlaceholderImage();
304 // Clear current placeholder image
305 Toolkit::Visual::Base visual = DevelControl::GetVisual(*this, Toolkit::ImageView::Property::PLACEHOLDER_IMAGE);
308 DevelControl::UnregisterVisual(*this, Toolkit::ImageView::Property::PLACEHOLDER_IMAGE);
311 mPlaceholderVisual.Reset();
312 mPlaceholderUrl = url;
316 std::string ImageView::GetPlaceholderUrl() const
318 return mPlaceholderUrl;
321 void ImageView::EnableTransitionEffect(bool effectEnable)
323 mTransitionEffect = effectEnable;
326 bool ImageView::IsTransitionEffectEnabled() const
328 return mTransitionEffect;
331 Vector3 ImageView::GetNaturalSize()
335 Vector2 rendererNaturalSize;
336 mVisual.GetNaturalSize(rendererNaturalSize);
339 padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
341 rendererNaturalSize.width += (padding.start + padding.end);
342 rendererNaturalSize.height += (padding.top + padding.bottom);
343 return Vector3(rendererNaturalSize);
346 // if no visual then use Control's natural size
347 return Control::GetNaturalSize();
350 float ImageView::GetHeightForWidth(float width)
353 padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
357 return mVisual.GetHeightForWidth(width) + padding.top + padding.bottom;
361 return Control::GetHeightForWidth(width) + padding.top + padding.bottom;
365 float ImageView::GetWidthForHeight(float height)
368 padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
372 return mVisual.GetWidthForHeight(height) + padding.start + padding.end;
376 return Control::GetWidthForHeight(height) + padding.start + padding.end;
380 void ImageView::OnRelayout(const Vector2& size, RelayoutContainer& container)
382 Control::OnRelayout(size, container);
385 // If Resource is not ready, fittingMode is not working well.
386 // in this case, imageview set the flag for working applyFittingMode again when the resource is ready
387 if(!IsResourceReady())
389 mNeedLazyFittingMode = true;
392 // Apply FittingMode using actor's size
393 ApplyFittingMode(size);
395 // mVisual is not updated util the resource is ready in the case of visual replacement.
396 // in this case, the Property Map must be initialized so that the previous value is not reused.
397 // after mVisual is updated, the correct value will be reset.
398 Toolkit::Visual::Base visual = DevelControl::GetVisual(*this, Toolkit::ImageView::Property::IMAGE);
399 if(visual && visual != mVisual)
401 visual.SetTransformAndSize(Property::Map(), size);
404 if(!mTransitionEffect)
406 // we don't need placeholder anymore because visual is replaced. so hide placeholder.
407 HidePlaceholderImage();
412 void ImageView::OnCreateTransitions(std::vector<std::pair<Dali::Property::Index, Dali::Property::Map>>& sourceProperties,
413 std::vector<std::pair<Dali::Property::Index, Dali::Property::Map>>& destinationProperties,
414 Dali::Toolkit::Control source,
415 Dali::Toolkit::Control destination)
417 // Retrieves image properties to be transitioned.
418 Dali::Property::Map imageSourcePropertyMap, imageDestinationPropertyMap;
419 MakeVisualTransition(imageSourcePropertyMap, imageDestinationPropertyMap, source, destination, Toolkit::ImageView::Property::IMAGE);
420 if(imageSourcePropertyMap.Count() > 0)
422 sourceProperties.push_back(std::pair<Dali::Property::Index, Dali::Property::Map>(Toolkit::ImageView::Property::IMAGE, imageSourcePropertyMap));
423 destinationProperties.push_back(std::pair<Dali::Property::Index, Dali::Property::Map>(Toolkit::ImageView::Property::IMAGE, imageDestinationPropertyMap));
427 void ImageView::OnUpdateVisualProperties(const std::vector<std::pair<Dali::Property::Index, Dali::Property::Map>>& properties)
429 Toolkit::Visual::Base visual = DevelControl::GetVisual(*this, Toolkit::ImageView::Property::IMAGE);
432 Dali::Toolkit::Control handle(GetOwner());
434 for(auto&& data : properties)
436 if(data.first == Toolkit::ImageView::Property::IMAGE)
438 DevelControl::DoAction(handle, Toolkit::ImageView::Property::IMAGE, DevelVisual::Action::UPDATE_PROPERTY, data.second);
445 void ImageView::OnResourceReady(Toolkit::Control control)
447 // In case of placeholder, we need to skip this call.
448 // TODO: In case of placeholder, it needs to be modified not to call OnResourceReady()
449 if(control.GetVisualResourceStatus(Toolkit::ImageView::Property::IMAGE) != Toolkit::Visual::ResourceStatus::READY)
454 // Do transition effect if need.
455 if(mTransitionEffect)
457 // TODO: Consider about placeholder image is loaded failed
458 Toolkit::Visual::Base placeholderVisual = DevelControl::GetVisual(*this, Toolkit::ImageView::Property::PLACEHOLDER_IMAGE);
459 if(!placeholderVisual || control.GetVisualResourceStatus(Toolkit::ImageView::Property::PLACEHOLDER_IMAGE) == Toolkit::Visual::ResourceStatus::READY)
461 // when placeholder is disabled or ready placeholder and image, we need to transition effect
462 TransitionImageWithEffect();
466 // Visual ready so update visual attached to this ImageView, following call to RelayoutRequest will use this visual.
467 mVisual = DevelControl::GetVisual(*this, Toolkit::ImageView::Property::IMAGE);
469 // Applying FittingMode again if it is not working well on OnRelayout().
470 if(mNeedLazyFittingMode)
472 const Vector2& size = Self().GetProperty(Dali::Actor::Property::SIZE).Get<Vector2>();
473 ApplyFittingMode(size);
474 mNeedLazyFittingMode = false;
477 // Signal that a Relayout may be needed
480 void ImageView::SetTransformMapForFittingMode(Vector2 finalSize, Vector2 naturalSize, Vector2 finalOffset, Visual::FittingMode fittingMode, Property::Map& transformMap)
484 case Visual::FittingMode::FIT_KEEP_ASPECT_RATIO:
486 auto availableVisualSize = finalSize;
488 // scale to fit the padded area
489 finalSize = naturalSize * std::min((!Dali::EqualsZero(naturalSize.width) ? (availableVisualSize.width / naturalSize.width) : 0),
490 (!Dali::EqualsZero(naturalSize.height) ? (availableVisualSize.height / naturalSize.height) : 0));
492 // calculate final offset within the padded area
493 finalOffset += (availableVisualSize - finalSize) * .5f;
495 // populate the transform map
496 transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, finalOffset)
497 .Add(Toolkit::Visual::Transform::Property::SIZE, finalSize);
500 case Visual::FittingMode::OVER_FIT_KEEP_ASPECT_RATIO:
502 mImageViewPixelAreaSetByFittingMode = true;
503 auto availableVisualSize = finalSize;
504 finalSize = naturalSize * std::max((!Dali::EqualsZero(naturalSize.width) ? (availableVisualSize.width / naturalSize.width) : 0.0f),
505 (!Dali::EqualsZero(naturalSize.height) ? (availableVisualSize.height / naturalSize.height) : 0.0f));
507 auto originalOffset = finalOffset;
508 finalOffset += (availableVisualSize - finalSize) * .5f;
510 float x = abs((availableVisualSize.width - finalSize.width) / finalSize.width) * .5f;
511 float y = abs((availableVisualSize.height - finalSize.height) / finalSize.height) * .5f;
512 float widthRatio = 1.f - abs((availableVisualSize.width - finalSize.width) / finalSize.width);
513 float heightRatio = 1.f - abs((availableVisualSize.height - finalSize.height) / finalSize.height);
514 Vector4 pixelArea = Vector4(x, y, widthRatio, heightRatio);
515 Self().SetProperty(Toolkit::ImageView::Property::PIXEL_AREA, pixelArea);
517 // populate the transform map
518 transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, originalOffset)
519 .Add(Toolkit::Visual::Transform::Property::SIZE, availableVisualSize);
522 case Visual::FittingMode::CENTER:
524 auto availableVisualSize = finalSize;
525 if(availableVisualSize.width > naturalSize.width && availableVisualSize.height > naturalSize.height)
527 finalSize = naturalSize;
531 finalSize = naturalSize * std::min((!Dali::EqualsZero(naturalSize.width) ? (availableVisualSize.width / naturalSize.width) : 0.0f),
532 (!Dali::EqualsZero(naturalSize.height) ? (availableVisualSize.height / naturalSize.height) : 0.0f));
535 finalOffset += (availableVisualSize - finalSize) * .5f;
537 // populate the transform map
538 transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, finalOffset)
539 .Add(Toolkit::Visual::Transform::Property::SIZE, finalSize);
542 case Visual::FittingMode::FILL:
544 transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, finalOffset)
545 .Add(Toolkit::Visual::Transform::Property::SIZE, finalSize);
548 case Visual::FittingMode::FIT_WIDTH:
549 case Visual::FittingMode::FIT_HEIGHT:
551 // This FittingMode already converted
557 void ImageView::ApplyFittingMode(const Vector2& size)
559 Property::Map transformMap = Property::Map();
561 Extents padding = Self().GetProperty<Extents>(Toolkit::Control::Property::PADDING);
563 bool zeroPadding = (padding == Extents());
565 Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>(
566 Self().GetProperty(Dali::Actor::Property::LAYOUT_DIRECTION).Get<int>());
567 if(Dali::LayoutDirection::RIGHT_TO_LEFT == layoutDirection)
569 std::swap(padding.start, padding.end);
572 // remove padding from the size to know how much is left for the visual
573 Vector2 finalSize = size - Vector2(padding.start + padding.end, padding.top + padding.bottom);
574 Vector2 finalOffset = Vector2(padding.start, padding.top);
576 Visual::FittingMode fittingMode = Toolkit::GetImplementation(mVisual).GetFittingMode();
578 // Reset PIXEL_AREA after using OVER_FIT_KEEP_ASPECT_RATIO
579 if(mImageViewPixelAreaSetByFittingMode)
581 Self().SetProperty(Toolkit::ImageView::Property::PIXEL_AREA, FULL_TEXTURE_RECT);
582 mImageViewPixelAreaSetByFittingMode = false;
585 if((!zeroPadding) || // If padding is not zero
586 (fittingMode != Visual::FittingMode::FILL))
588 mImageVisualPaddingSetByTransform = true;
591 // NaturalSize will not be used for FILL fitting mode, which is default.
592 // Skip GetNaturalSize
593 if(fittingMode != Visual::FittingMode::FILL)
595 mVisual.GetNaturalSize(naturalSize);
598 // If FittingMode use FIT_WIDTH or FIT_HEIGTH, it need to change proper fittingMode
599 if(fittingMode == Visual::FittingMode::FIT_WIDTH)
601 fittingMode = (finalSize.height / naturalSize.height) < (finalSize.width / naturalSize.width) ? Visual::FittingMode::OVER_FIT_KEEP_ASPECT_RATIO : Visual::FittingMode::FIT_KEEP_ASPECT_RATIO;
603 else if(fittingMode == Visual::FittingMode::FIT_HEIGHT)
605 fittingMode = (finalSize.height / naturalSize.height) < (finalSize.width / naturalSize.width) ? Visual::FittingMode::FIT_KEEP_ASPECT_RATIO : Visual::FittingMode::OVER_FIT_KEEP_ASPECT_RATIO;
608 SetTransformMapForFittingMode(finalSize, naturalSize, finalOffset, fittingMode, transformMap);
610 // Set extra value for applying transformMap
611 transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET_POLICY,
612 Vector2(Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE))
613 .Add(Toolkit::Visual::Transform::Property::ORIGIN, Toolkit::Align::TOP_BEGIN)
614 .Add(Toolkit::Visual::Transform::Property::ANCHOR_POINT, Toolkit::Align::TOP_BEGIN)
615 .Add(Toolkit::Visual::Transform::Property::SIZE_POLICY,
616 Vector2(Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE));
618 else if(mImageVisualPaddingSetByTransform && zeroPadding) // Reset offset to zero only if padding applied previously
620 mImageVisualPaddingSetByTransform = false;
621 // Reset the transform map
622 transformMap.Add(Toolkit::Visual::Transform::Property::OFFSET, Vector2::ZERO)
623 .Add(Toolkit::Visual::Transform::Property::OFFSET_POLICY,
624 Vector2(Toolkit::Visual::Transform::Policy::RELATIVE, Toolkit::Visual::Transform::Policy::RELATIVE))
625 .Add(Toolkit::Visual::Transform::Property::SIZE, Vector2::ONE)
626 .Add(Toolkit::Visual::Transform::Property::SIZE_POLICY,
627 Vector2(Toolkit::Visual::Transform::Policy::RELATIVE, Toolkit::Visual::Transform::Policy::RELATIVE));
630 mVisual.SetTransformAndSize(transformMap, size);
633 void ImageView::CreatePlaceholderImage()
635 Property::Map propertyMap;
636 propertyMap.Insert(Toolkit::Visual::Property::TYPE, Toolkit::Visual::IMAGE);
637 propertyMap.Insert(Toolkit::ImageVisual::Property::URL, mPlaceholderUrl);
638 //propertyMap.Insert(Toolkit::ImageVisual::Property::LOAD_POLICY, Toolkit::ImageVisual::LoadPolicy::IMMEDIATE); // TODO: need to enable this property
639 propertyMap.Insert(Toolkit::ImageVisual::Property::RELEASE_POLICY, Toolkit::ImageVisual::ReleasePolicy::DESTROYED);
640 propertyMap.Insert(Toolkit::DevelImageVisual::Property::ENABLE_BROKEN_IMAGE, false);
641 mPlaceholderVisual = Toolkit::VisualFactory::Get().CreateVisual(propertyMap);
642 if(mPlaceholderVisual)
644 mPlaceholderVisual.SetName("placeholder");
645 mPlaceholderVisual.SetDepthIndex(mPlaceholderVisual.GetDepthIndex() + PLACEHOLDER_DEPTH_INDEX);
649 DevelControl::UnregisterVisual(*this, Toolkit::ImageView::Property::PLACEHOLDER_IMAGE);
650 mPlaceholderVisual.Reset();
654 void ImageView::ShowPlaceholderImage()
656 if(mPlaceholderVisual)
658 DevelControl::RegisterVisual(*this, Toolkit::ImageView::Property::PLACEHOLDER_IMAGE, mPlaceholderVisual, false);
660 Toolkit::GetImplementation(mPlaceholderVisual).SetOnScene(self);
664 void ImageView::HidePlaceholderImage()
666 if(mPlaceholderVisual)
668 DevelControl::UnregisterVisual(*this, Toolkit::ImageView::Property::PLACEHOLDER_IMAGE);
672 Toolkit::GetImplementation(mPlaceholderVisual).SetOffScene(self);
676 void ImageView::TransitionImageWithEffect()
678 Toolkit::ImageView handle = Toolkit::ImageView(GetOwner());
684 // If the image is not replaced, the transition effect is not required.
688 if(mTransitionAnimation)
690 ClearTransitionAnimation();
693 // Control visual's depth for transition effect
696 mPreviousVisual.SetDepthIndex(mPreviousVisual.GetDepthIndex() + PREVIOUS_VISUAL_DEPTH_INDEX);
699 mTransitionAnimation = Animation::New(TRANSITION_EFFECT_SPEED);
700 mTransitionAnimation.SetEndAction(Animation::EndAction::DISCARD);
701 float destinationAlpha = (mTransitionTargetAlpha > LOW_OPACITY) ? mTransitionTargetAlpha : LOW_OPACITY;
703 // Transition current image
704 Toolkit::Visual::Base imageVisual = DevelControl::GetVisual(*this, Toolkit::ImageView::Property::IMAGE);
707 Dali::KeyFrames fadeinKeyFrames = Dali::KeyFrames::New();
708 fadeinKeyFrames.Add(0.0f, LOW_OPACITY);
709 fadeinKeyFrames.Add(1.0f, destinationAlpha);
710 mTransitionAnimation.AnimateBetween(DevelControl::GetVisualProperty(handle, Toolkit::ImageView::Property::IMAGE, Toolkit::Visual::Property::OPACITY), fadeinKeyFrames, AlphaFunction::EASE_IN_OUT);
711 imageVisual.SetDepthIndex(imageVisual.GetDepthIndex() + CURRENT_VISUAL_DEPTH_INDEX);
714 // Play transition animation
715 mTransitionAnimation.FinishedSignal().Connect(this, &ImageView::OnTransitionAnimationFinishedCallback);
716 mTransitionAnimation.Play();
720 void ImageView::ClearTransitionAnimation()
722 // Clear PreviousVisual
726 Internal::Control::Impl& controlDataImpl = Internal::Control::Impl::Get(*this);
727 controlDataImpl.EnableReadyTransitionOverriden(mVisual, false);
728 Toolkit::GetImplementation(mPreviousVisual).SetOffScene(self);
729 mPreviousVisual.Reset();
732 if(mTransitionAnimation)
734 if(mTransitionAnimation.GetState() == Animation::PLAYING)
736 mTransitionAnimation.Stop();
738 mTransitionAnimation.FinishedSignal().Disconnect(this, &ImageView::OnTransitionAnimationFinishedCallback);
739 mTransitionAnimation.Clear();
740 mTransitionAnimation.Reset();
742 // After transition effect is cleared, we don't need transition effect until image is replaced.
743 mImageReplaced = false;
747 ///////////////////////////////////////////////////////////
752 void ImageView::SetProperty(BaseObject* object, Property::Index index, const Property::Value& value)
754 Toolkit::ImageView imageView = Toolkit::ImageView::DownCast(Dali::BaseHandle(object));
758 ImageView& impl = GetImpl(imageView);
761 case Toolkit::ImageView::Property::IMAGE:
763 std::string imageUrl;
764 const Property::Map* map;
765 if(value.Get(imageUrl))
767 impl.SetImage(imageUrl, ImageDimensions());
769 // if its not a string then get a Property::Map from the property if possible.
772 map = value.GetMap();
775 // the property map is emtpy map. Unregister visual.
776 if(DALI_UNLIKELY(map->Count() == 0u))
778 impl.ClearImageVisual();
782 Property::Value* shaderValue = map->Find(Toolkit::Visual::Property::SHADER, CUSTOM_SHADER);
783 // set image only if property map contains image information other than custom shader
784 if(map->Count() > 1u || !shaderValue)
788 // the property map contains only the custom shader
789 else if((map->Count() == 1u) && (shaderValue))
791 Property::Map* shaderMap = shaderValue->GetMap();
794 impl.mShaderMap = *shaderMap;
796 if(!impl.mUrl.empty())
798 impl.SetImage(impl.mUrl, impl.mImageSize);
800 else if(!impl.mPropertyMap.Empty())
802 impl.SetImage(impl.mPropertyMap);
810 // invalid property value comes. Unregister visual.
811 impl.ClearImageVisual();
817 case Toolkit::ImageView::Property::PRE_MULTIPLIED_ALPHA:
822 impl.EnablePreMultipliedAlpha(isPre);
827 case Toolkit::ImageView::Property::PLACEHOLDER_IMAGE:
829 std::string placeholderUrl;
830 if(value.Get(placeholderUrl))
832 impl.SetPlaceholderUrl(placeholderUrl);
837 case Toolkit::ImageView::Property::ENABLE_TRANSITION_EFFECT:
839 bool transitionEffect;
840 if(value.Get(transitionEffect))
842 impl.EnableTransitionEffect(transitionEffect);
850 Property::Value ImageView::GetProperty(BaseObject* object, Property::Index propertyIndex)
852 Property::Value value;
854 Toolkit::ImageView imageview = Toolkit::ImageView::DownCast(Dali::BaseHandle(object));
858 ImageView& impl = GetImpl(imageview);
859 switch(propertyIndex)
861 case Toolkit::ImageView::Property::IMAGE:
863 if(!impl.mUrl.empty())
870 Toolkit::Visual::Base visual = DevelControl::GetVisual(impl, Toolkit::ImageView::Property::IMAGE);
873 visual.CreatePropertyMap(map);
880 case Toolkit::ImageView::Property::PRE_MULTIPLIED_ALPHA:
882 value = impl.IsPreMultipliedAlphaEnabled();
886 case Toolkit::ImageView::Property::PLACEHOLDER_IMAGE:
888 value = impl.GetPlaceholderUrl();
892 case Toolkit::ImageView::Property::ENABLE_TRANSITION_EFFECT:
894 value = impl.IsTransitionEffectEnabled();
903 void ImageView::OnTransitionAnimationFinishedCallback(Animation& animation)
906 HidePlaceholderImage();
907 ClearTransitionAnimation();
910 } // namespace Internal
911 } // namespace Toolkit