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-rw-r--r--ext/tk/lib/tkextlib/iwidgets/checkbox.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/ext/tk/lib/tkextlib/iwidgets/checkbox.rb b/ext/tk/lib/tkextlib/iwidgets/checkbox.rb
index 05d0e1d813..abd23299a8 100644
--- a/ext/tk/lib/tkextlib/iwidgets/checkbox.rb
+++ b/ext/tk/lib/tkextlib/iwidgets/checkbox.rb
@@ -32,6 +32,11 @@ class Tk::Iwidgets::Checkbox
end
private :__item_config_cmd
+ def __item_boolval_optkeys(id)
+ super(id) << 'defaultring'
+ end
+ private :__item_boolval_optkeys
+
def tagid(tagOrId)
if tagOrId.kind_of?(Tk::Itk::Component)
tagOrId.name