bpo-42721: Improve using simple dialogs without root window (GH-23897)
When simple query dialogs (tkinter.simpledialog), message boxes
(tkinter.messagebox) or color choose dialog (tkinter.colorchooser)
are created without arguments master and parent, and the default
root window is not yet created, a new temporary hidden root window
will be created automatically. It will not be set as the default root
window and will be destroyed right after closing the dialog window.
It will help to use these simple dialog windows in programs which do
not need other GUI.
Previously, message boxes and color chooser created the blank root
window and left it after closing the dialog window, and query dialogs
just raised an exception.
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Lib/tkinter/simpledialog.py b/Lib/tkinter/simpledialog.py
index d9762b1..a66fbd6 100644
--- a/Lib/tkinter/simpledialog.py
+++ b/Lib/tkinter/simpledialog.py
@@ -24,7 +24,8 @@
"""
from tkinter import *
-from tkinter import messagebox, _get_default_root
+from tkinter import _get_temp_root, _destroy_temp_root
+from tkinter import messagebox
class SimpleDialog:
@@ -100,7 +101,7 @@ def __init__(self, parent, title = None):
'''
master = parent
if master is None:
- master = _get_default_root('create dialog window')
+ master = _get_temp_root()
Toplevel.__init__(self, master)
@@ -142,6 +143,7 @@ def destroy(self):
'''Destroy the window'''
self.initial_focus = None
Toplevel.destroy(self)
+ _destroy_temp_root(self.master)
#
# construction hooks