New with additional behavior flag for some Controls

[platform/core/uifw/dali-toolkit.git] / dali-toolkit / internal / controls / image-view / image-view-impl.cpp

diff --git a/dali-toolkit/internal/controls/image-view/image-view-impl.cpp b/dali-toolkit/internal/controls/image-view/image-view-impl.cpp
index c299886..46c9e11 100644 (file)
--- a/dali-toolkit/internal/controls/image-view/image-view-impl.cpp
+++ b/dali-toolkit/internal/controls/image-view/image-view-impl.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2022 Samsung Electronics Co., Ltd.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -61,8 +61,8 @@ DALI_TYPE_REGISTRATION_END()
 
 using namespace Dali;
 
-ImageView::ImageView()
-: Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT)),
+ImageView::ImageView(ControlBehaviour additionalBehaviour)
+: Control(ControlBehaviour(CONTROL_BEHAVIOUR_DEFAULT | additionalBehaviour)),
   mImageSize(),
   mImageVisualPaddingSetByTransform(false),
   mImageViewPixelAreaSetByFittingMode(false)
@@ -73,9 +73,9 @@ ImageView::~ImageView()
 {
 }
 
-Toolkit::ImageView ImageView::New()
+Toolkit::ImageView ImageView::New(ControlBehaviour additionalBehaviour)
 {
-  ImageView* impl = new ImageView();
+  ImageView* impl = new ImageView(additionalBehaviour);
 
   Toolkit::ImageView handle = Toolkit::ImageView(*impl);
 
@@ -171,6 +171,19 @@ void ImageView::SetImage(const std::string& url, ImageDimensions size)
   // Signal that a Relayout may be needed
 }
 
+void ImageView::ClearImageVisual()
+{
+  // Clear cached properties
+  mPropertyMap.Clear();
+  mUrl.clear();
+
+  // Unregister the exsiting visual
+  DevelControl::UnregisterVisual(*this, Toolkit::ImageView::Property::IMAGE);
+
+  // Trigger a size negotiation request that may be needed when unregistering a visual.
+  RelayoutRequest();
+}
+
 void ImageView::EnablePreMultipliedAlpha(bool preMultipled)
 {
   if(mVisual)
@@ -477,33 +490,46 @@ void ImageView::SetProperty(BaseObject* object, Property::Index index, const Pro
         else
         {
           map = value.GetMap();
-          if(map)
+          if(DALI_LIKELY(map))
           {
-            Property::Value* shaderValue = map->Find(Toolkit::Visual::Property::SHADER, CUSTOM_SHADER);
-            // set image only if property map contains image information other than custom shader
-            if(map->Count() > 1u || !shaderValue)
+            // the property map is emtpy map. Unregister visual.
+            if(DALI_UNLIKELY(map->Count() == 0u))
             {
-              impl.SetImage(*map);
+              impl.ClearImageVisual();
             }
-            // the property map contains only the custom shader
-            else if((map->Count() == 1u) && (shaderValue))
+            else
             {
-              Property::Map* shaderMap = shaderValue->GetMap();
-              if(shaderMap)
+              Property::Value* shaderValue = map->Find(Toolkit::Visual::Property::SHADER, CUSTOM_SHADER);
+              // set image only if property map contains image information other than custom shader
+              if(map->Count() > 1u || !shaderValue)
               {
-                impl.mShaderMap = *shaderMap;
-
-                if(!impl.mUrl.empty())
-                {
-                  impl.SetImage(impl.mUrl, impl.mImageSize);
-                }
-                else if(!impl.mPropertyMap.Empty())
+                impl.SetImage(*map);
+              }
+              // the property map contains only the custom shader
+              else if((map->Count() == 1u) && (shaderValue))
+              {
+                Property::Map* shaderMap = shaderValue->GetMap();
+                if(shaderMap)
                 {
-                  impl.SetImage(impl.mPropertyMap);
+                  impl.mShaderMap = *shaderMap;
+
+                  if(!impl.mUrl.empty())
+                  {
+                    impl.SetImage(impl.mUrl, impl.mImageSize);
+                  }
+                  else if(!impl.mPropertyMap.Empty())
+                  {
+                    impl.SetImage(impl.mPropertyMap);
+                  }
                 }
               }
             }
           }
+          else
+          {
+            // invalid property value comes. Unregister visual.
+            impl.ClearImageVisual();
+          }
         }
         break;
       }