+ auto childControl = Toolkit::Control::DownCast(childLayout->GetOwner());
+
+ // If child control has children check if a ResizePolicy is set on it. A LayoutItem could be a legacy container.
+ // A legacy container would need it's ResizePolicy to be applied as a MeasureSpec.
+
+ // Check below will be true for legacy containers and controls with layout required set.
+ // Other layouts will have their own OnMeasure (a checked requirement) hence not execute LayoutGroup::OnMeasure.
+ // Controls which have set layout required will not be legacy controls hence should not have a ResizePolicy set.
+ if( childControl.GetChildCount() > 0 )
+ {
+ // First pass, Static mappings that are not dependant on parent
+ SizeNegotiationMapper::SetLayoutParametersUsingResizePolicy( childControl, childLayout, Dimension::WIDTH );
+ SizeNegotiationMapper::SetLayoutParametersUsingResizePolicy( childControl, childLayout, Dimension::HEIGHT );
+ }
+
+ // Second pass, if any mappings were not possible due to parent size dependancies then calculate an exact desired size for child
+ if( true == childLayout->IsResizePolicyRequired() ) // No need to test child count as this flag would only be set if control had children.
+ {
+ // Get last stored width and height specifications for the child
+ LayoutLength desiredWidth = childControl.GetProperty<float>( Toolkit::LayoutItem::ChildProperty::WIDTH_SPECIFICATION );
+ LayoutLength desiredHeight = childControl.GetProperty<float>( Toolkit::LayoutItem::ChildProperty::HEIGHT_SPECIFICATION );
+
+ DALI_LOG_INFO( gLogFilter, Debug::General, "LayoutGroup::MeasureChild Initial desired size pre ResizePolicy(%f,%f)\n", desiredWidth.AsInteger(), desiredHeight.AsInteger() );
+
+ childLayout->SetResizePolicyRequired( false ); // clear flag incase in case of changes before next Measure
+ SizeNegotiationMapper::GetSizeofChildForParentDependentResizePolicy( childControl, widthMeasureSpec, heightMeasureSpec, desiredWidth, desiredHeight );
+
+ // Parent dependant ResizePolicies become exact sizes so are now set on the child before it's measured.
+ childControl.SetProperty( Toolkit::LayoutItem::ChildProperty::WIDTH_SPECIFICATION, desiredWidth.AsInteger() );
+ childControl.SetProperty( Toolkit::LayoutItem::ChildProperty::HEIGHT_SPECIFICATION, desiredHeight.AsInteger() );
+
+ DALI_LOG_INFO( gLogFilter, Debug::General, " LayoutGroup::OnMeasure ResizePolicy Required resulting size(%f,%f)\n", desiredWidth.AsInteger(), desiredHeight.AsInteger() );
+ }