lib/shoes/swt/common/visibility.rb in shoes-swt-4.0.0.pre12 vs lib/shoes/swt/common/visibility.rb in shoes-swt-4.0.0.rc1

@@ -1,12 +1,17 @@
 # frozen_string_literal: true
+
 class Shoes
   module Swt
     module Common
       module Visibility
         def update_visibility
-          if @real && @real.respond_to?(:set_visible)
-            @real.set_visible(@dsl.visible?)
+          if defined?(@real) && @real.respond_to?(:set_visible)
+            # hidden_from_view? handles all visiblity conditions, including
+            # being outside a slot. SWT as backend doesn't get that for free
+            # because we can't use Composites as they lack transparency...
+            visible = !@dsl.hidden_from_view?
+            @real.set_visible(visible)
           end
         end
       end
     end
   end