Issue #27611: Fixed support of default root window in the tkinter.tix module.

1 files changed, 9 insertions, 4 deletions

diff --git a/Lib/tkinter/tix.py b/Lib/tkinter/tix.py
index 89113fd..7fb4bc5 100644
--- a/Lib/tkinter/tix.py
+++ b/Lib/tkinter/tix.py
@@ -477,10 +477,15 @@ class DisplayStyle:
     (multiple) Display Items"""
 
     def __init__(self, itemtype, cnf={}, **kw):
-        master = tkinter._default_root              # global from Tkinter
-        if not master and 'refwindow' in cnf: master=cnf['refwindow']
-        elif not master and 'refwindow' in kw:  master= kw['refwindow']
-        elif not master: raise RuntimeError("Too early to create display style: no root window")
+        if 'refwindow' in kw:
+            master = kw['refwindow']
+        elif 'refwindow' in cnf:
+            master = cnf['refwindow']
+        else:
+            master = tkinter._default_root
+            if not master:
+                raise RuntimeError("Too early to create display style: "
+                                   "no root window")
         self.tk = master.tk
         self.stylename = self.tk.call('tixDisplayStyle', itemtype,
                             *self._options(cnf,kw) )