Allow ImageView padding to be set to Zero

[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 f709559..edff0e3 100755 (executable)
--- 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) 2018 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2019 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.
@@ -64,7 +64,9 @@ DALI_TYPE_REGISTRATION_END()
 using namespace Dali;
 
 ImageView::ImageView()
-: Control( ControlBehaviour( CONTROL_BEHAVIOUR_DEFAULT ) )
+: Control( ControlBehaviour( CONTROL_BEHAVIOUR_DEFAULT ) ),
+  mImageSize(),
+  mImageVisualPaddingSetByTransform( false )
 {
 }
 
@@ -109,18 +111,24 @@ void ImageView::SetImage( Image image )
       mVisual = visual;
     }
 
-    DevelControl::RegisterVisual( *this, Toolkit::ImageView::Property::IMAGE, visual  );
+    if( !mShaderMap.Empty() )
+    {
+      Internal::Visual::Base& visualImpl = Toolkit::GetImplementation( visual );
+      visualImpl.SetCustomShader( mShaderMap );
+    }
+
+    DevelControl::RegisterVisual( *this, Toolkit::ImageView::Property::IMAGE, visual );
   }
   else
   {
-    // Unregister the exsiting visual
+    // Unregister the existing visual
     DevelControl::UnregisterVisual( *this, Toolkit::ImageView::Property::IMAGE );
 
     // Trigger a size negotiation request that may be needed when unregistering a visual.
     RelayoutRequest();
   }
 
-  Toolkit::DevelControl::RequestLayout( *this );
+  // Signal that a Relayout may be needed
 }
 
 void ImageView::SetImage( const Property::Map& map )
@@ -139,6 +147,12 @@ void ImageView::SetImage( const Property::Map& map )
       mVisual = visual;
     }
 
+    if( !mShaderMap.Empty() )
+    {
+      Internal::Visual::Base& visualImpl = Toolkit::GetImplementation( visual );
+      visualImpl.SetCustomShader( mShaderMap );
+    }
+
     DevelControl::RegisterVisual( *this, Toolkit::ImageView::Property::IMAGE, visual  );
   }
   else
@@ -150,13 +164,14 @@ void ImageView::SetImage( const Property::Map& map )
     RelayoutRequest();
   }
 
-  Toolkit::DevelControl::RequestLayout( *this );
+  // Signal that a Relayout may be needed
 }
 
 void ImageView::SetImage( const std::string& url, ImageDimensions size )
 {
   // Don't bother comparing if we had a visual previously, just drop old visual and create new one
   mUrl = url;
+  mImageSize = size;
   mImage.Reset();
   mPropertyMap.Clear();
 
@@ -169,6 +184,12 @@ void ImageView::SetImage( const std::string& url, ImageDimensions size )
       mVisual = visual;
     }
 
+    if( !mShaderMap.Empty() )
+    {
+      Internal::Visual::Base& visualImpl = Toolkit::GetImplementation( visual );
+      visualImpl.SetCustomShader( mShaderMap );
+    }
+
     DevelControl::RegisterVisual( *this, Toolkit::ImageView::Property::IMAGE, visual );
   }
   else
@@ -180,7 +201,7 @@ void ImageView::SetImage( const std::string& url, ImageDimensions size )
     RelayoutRequest();
   }
 
-  Toolkit::DevelControl::RequestLayout( *this );
+  // Signal that a Relayout may be needed
 }
 
 Image ImageView::GetImage() const
@@ -273,7 +294,8 @@ void ImageView::OnRelayout( const Vector2& size, RelayoutContainer& container )
     Extents padding = Self().GetProperty<Extents>( Toolkit::Control::Property::PADDING );
     const Visual::FittingMode fittingMode = Toolkit::GetImplementation(mVisual).GetFittingMode();
 
-    if( ( padding != Extents() ) || // If padding is not zero
+    bool zeroPadding = ( padding == Extents() );
+    if( ( !zeroPadding ) || // If padding is not zero
         ( fittingMode == Visual::FittingMode::FIT_KEEP_ASPECT_RATIO ) )
     {
       Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>(
@@ -285,6 +307,7 @@ void ImageView::OnRelayout( const Vector2& size, RelayoutContainer& container )
       }
 
       auto finalOffset = Vector2( padding.start, padding.top );
+      mImageVisualPaddingSetByTransform = true;
 
       // remove padding from the size to know how much is left for the visual
       auto finalSize = size - Vector2( padding.start + padding.end, padding.top + padding.bottom );
@@ -315,6 +338,15 @@ void ImageView::OnRelayout( const Vector2& size, RelayoutContainer& container )
                   .Add( Toolkit::Visual::Transform::Property::SIZE_POLICY,
                       Vector2( Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE ) );
     }
+    else if ( mImageVisualPaddingSetByTransform && zeroPadding )  // Reset offset to zero only if padding applied previously
+    {
+      mImageVisualPaddingSetByTransform = false;
+      // Reset the transform map
+      transformMap.Add( Toolkit::Visual::Transform::Property::OFFSET, Vector2::ZERO )
+                  .Add( Toolkit::Visual::Transform::Property::OFFSET_POLICY,
+                        Vector2( Toolkit::Visual::Transform::Policy::RELATIVE, Toolkit::Visual::Transform::Policy::RELATIVE ) );
+    }
+
 
     mVisual.SetTransformAndSize( transformMap, size );
   }
@@ -324,6 +356,7 @@ void ImageView::OnResourceReady( Toolkit::Control control )
 {
   // Visual ready so update visual attached to this ImageView, following call to RelayoutRequest will use this visual.
   mVisual = DevelControl::GetVisual( *this, Toolkit::ImageView::Property::IMAGE );
+  // Signal that a Relayout may be needed
 }
 
 ///////////////////////////////////////////////////////////
@@ -371,18 +404,24 @@ void ImageView::SetProperty( BaseObject* object, Property::Index index, const Pr
               impl.SetImage( *map );
             }
             // the property map contains only the custom shader
-            else if( ( impl.mVisual )&&( map->Count() == 1u )&&( shaderValue ) )
+            else if( ( map->Count() == 1u )&&( shaderValue ) )
             {
               Property::Map* shaderMap = shaderValue->GetMap();
               if( shaderMap )
               {
-                Internal::Visual::Base& visual = Toolkit::GetImplementation( impl.mVisual );
-                visual.SetCustomShader( *shaderMap );
-                if( imageView.OnStage() )
+                impl.mShaderMap = *shaderMap;
+
+                if( !impl.mUrl.empty() )
                 {
-                  // force to create new core renderer to use the newly set shader
-                  visual.SetOffStage( imageView );
-                  visual.SetOnStage( imageView );
+                  impl.SetImage( impl.mUrl, impl.mImageSize );
+                }
+                else if( impl.mImage )
+                {
+                  impl.SetImage( impl.mImage );
+                }
+                else if( !impl.mPropertyMap.Empty() )
+                {
+                  impl.SetImage( impl.mPropertyMap );
                 }
               }
             }
@@ -436,9 +475,15 @@ Property::Value ImageView::GetProperty( BaseObject* object, Property::Index prop
           Scripting::CreatePropertyMap( impl.mImage, map );
           value = map;
         }
-        else if( !impl.mPropertyMap.Empty() )
+        else
         {
-          value = impl.mPropertyMap;
+          Property::Map map;
+          Toolkit::Visual::Base visual = DevelControl::GetVisual( impl, Toolkit::ImageView::Property::IMAGE );
+          if( visual )
+          {
+            visual.CreatePropertyMap( map );
+          }
+          value = map;
         }
         break;
       }