lib/glimmer/dsl/opal/widget_expression.rb in glimmer-dsl-opal-0.7.0 vs lib/glimmer/dsl/opal/widget_expression.rb in glimmer-dsl-opal-0.7.1

@@ -18,11 +18,15 @@
         def interpret(parent, keyword, *args, &block)
           Glimmer::SWT::WidgetProxy.for(keyword, parent, args, block)
         end
 
         def add_content(parent, &block)
-          super(parent, &block)
-          parent.post_add_content
+          if parent.rendered?
+            super(parent, &block)
+            parent.post_add_content
+          else
+            parent.add_content_on_render(&block)
+          end
         end
       end
     end
   end
 end