Merge "Add new layouting support for TextLabel and ImageView." into devel/master

[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
old mode 100644 (file)
new mode 100755 (executable)
index 37b2dd5..11d5389
--- 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) 2017 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2018 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.
@@ -102,12 +102,25 @@ void ImageView::SetImage( Image image )
   mPropertyMap.Clear();
 
   Toolkit::Visual::Base visual =  Toolkit::VisualFactory::Get().CreateVisual( image );
-  if (!mVisual)
+  if( visual )
   {
-    mVisual = visual;
+    if( !mVisual )
+    {
+      mVisual = visual;
+    }
+
+    DevelControl::RegisterVisual( *this, Toolkit::ImageView::Property::IMAGE, visual  );
   }
+  else
+  {
+    // Unregister the exsiting visual
+    DevelControl::UnregisterVisual( *this, Toolkit::ImageView::Property::IMAGE );
 
-  DevelControl::RegisterVisual( *this, Toolkit::ImageView::Property::IMAGE, visual  );
+    // Trigger a size negotiation request that may be needed when unregistering a visual.
+    RelayoutRequest();
+  }
+
+  Toolkit::DevelControl::RequestLayout( *this );
 }
 
 void ImageView::SetImage( const Property::Map& map )
@@ -118,13 +131,26 @@ void ImageView::SetImage( const Property::Map& map )
   mImage.Reset();
 
   Toolkit::Visual::Base visual =  Toolkit::VisualFactory::Get().CreateVisual( mPropertyMap );
-  // Don't set mVisual until it is ready and shown. Getters will still use current visual.
-  if (!mVisual)
+  if( visual )
+  {
+    // Don't set mVisual until it is ready and shown. Getters will still use current visual.
+    if( !mVisual )
+    {
+      mVisual = visual;
+    }
+
+    DevelControl::RegisterVisual( *this, Toolkit::ImageView::Property::IMAGE, visual  );
+  }
+  else
   {
-    mVisual = visual;
+    // 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();
   }
 
-  DevelControl::RegisterVisual( *this, Toolkit::ImageView::Property::IMAGE, visual  );
+  Toolkit::DevelControl::RequestLayout( *this );
 }
 
 void ImageView::SetImage( const std::string& url, ImageDimensions size )
@@ -136,12 +162,25 @@ void ImageView::SetImage( const std::string& url, ImageDimensions size )
 
   // Don't set mVisual until it is ready and shown. Getters will still use current visual.
   Toolkit::Visual::Base visual =  Toolkit::VisualFactory::Get().CreateVisual( url, size );
-  if (!mVisual)
+  if( visual )
   {
-    mVisual = visual;
+    if( !mVisual )
+    {
+      mVisual = visual;
+    }
+
+    DevelControl::RegisterVisual( *this, Toolkit::ImageView::Property::IMAGE, visual );
   }
+  else
+  {
+    // Unregister the exsiting visual
+    DevelControl::UnregisterVisual( *this, Toolkit::ImageView::Property::IMAGE );
 
-  DevelControl::RegisterVisual( *this, Toolkit::ImageView::Property::IMAGE, visual );
+    // Trigger a size negotiation request that may be needed when unregistering a visual.
+    RelayoutRequest();
+  }
+
+  Toolkit::DevelControl::RequestLayout( *this );
 }
 
 Image ImageView::GetImage() const
@@ -229,24 +268,49 @@ void ImageView::OnRelayout( const Vector2& size, RelayoutContainer& container )
 
   if( mVisual )
   {
-    Extents margin;
-    margin = Self().GetProperty<Extents>( Toolkit::Control::Property::MARGIN );
+    Property::Map transformMap = Property::Map();
 
-    Extents padding;
-    padding = Self().GetProperty<Extents>( Toolkit::Control::Property::PADDING );
+    Extents padding = Self().GetProperty<Extents>( Toolkit::Control::Property::PADDING );
 
-    Property::Map transformMap = Property::Map();
+    Dali::LayoutDirection::Type layoutDirection = static_cast<Dali::LayoutDirection::Type>(
+          Self().GetProperty( Dali::Actor::Property::LAYOUT_DIRECTION ).Get<int>() );
 
-    if( ( padding.start != 0 ) || ( padding.end != 0 ) || ( padding.top != 0 ) || ( padding.bottom != 0 ) ||
-        ( margin.start != 0 ) || ( margin.end != 0 ) || ( margin.top != 0 ) || ( margin.bottom != 0 ) )
+    if( Dali::LayoutDirection::RIGHT_TO_LEFT == layoutDirection )
     {
-      transformMap.Add( Toolkit::Visual::Transform::Property::OFFSET, Vector2( margin.start + padding.start, margin.top + padding.top ) )
-                  .Add( Toolkit::Visual::Transform::Property::OFFSET_POLICY, Vector2( Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE ) )
-                  .Add( Toolkit::Visual::Transform::Property::ORIGIN, Toolkit::Align::TOP_BEGIN )
-                  .Add( Toolkit::Visual::Transform::Property::ANCHOR_POINT, Toolkit::Align::TOP_BEGIN );
+      std::swap( padding.start, padding.end );
     }
 
+    auto finalOffset = Vector2( padding.start, padding.top );
+
+    // 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 );
+
     // Should provide a transform that handles aspect ratio according to image size
+    if( Toolkit::GetImplementation(mVisual).GetFittingMode() == Visual::FittingMode::FIT_KEEP_ASPECT_RATIO )
+    {
+      auto availableVisualSize = finalSize;
+
+      Vector2 naturalSize;
+      mVisual.GetNaturalSize( naturalSize );
+
+      // scale to fit the padded area
+      finalSize = naturalSize * std::min( ( naturalSize.width  ? ( availableVisualSize.width  / naturalSize.width  ) : 0 ),
+                                          ( naturalSize.height ? ( availableVisualSize.height / naturalSize.height ) : 0 ) );
+
+      // calculate final offset within the padded area
+      finalOffset += ( availableVisualSize - finalSize ) * .5f;
+    }
+
+    // populate the transform map
+    transformMap.Add( Toolkit::Visual::Transform::Property::OFFSET, finalOffset )
+                .Add( Toolkit::Visual::Transform::Property::OFFSET_POLICY,
+                    Vector2( Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE ) )
+                .Add( Toolkit::Visual::Transform::Property::ORIGIN, Toolkit::Align::TOP_BEGIN )
+                .Add( Toolkit::Visual::Transform::Property::ANCHOR_POINT, Toolkit::Align::TOP_BEGIN )
+                .Add( Toolkit::Visual::Transform::Property::SIZE, finalSize )
+                .Add( Toolkit::Visual::Transform::Property::SIZE_POLICY,
+                    Vector2( Toolkit::Visual::Transform::Policy::ABSOLUTE, Toolkit::Visual::Transform::Policy::ABSOLUTE ) );
+
     mVisual.SetTransformAndSize( transformMap, size );
   }
 }