ttk.OptionMenu radiobuttons aren't unique between two instances of OptionMenu

[BryanOakley]

BPO	25684
Nosy	@serhiy-storchaka, @Mariatta, @csabella
PRs	bpo-25684: ttk.OptionMenu radiobuttons aren't unique between instance… #2276 [3.6] bpo-25684: ttk.OptionMenu radiobuttons weren't unique (GH-2276) #2959 [2.7] bpo-25684: ttk.OptionMenu radiobuttons weren't unique (GH-2276) #2960

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/serhiy-storchaka'
closed_at = <Date 2017-09-10.06:03:47.096>
created_at = <Date 2015-11-20.17:24:48.504>
labels = ['3.7', 'type-bug', 'expert-tkinter']
title = "ttk.OptionMenu radiobuttons aren't unique between two instances of OptionMenu"
updated_at = <Date 2017-09-10.06:03:47.094>
user = 'https://bugs.python.org/BryanOakley'

bugs.python.org fields:

activity = <Date 2017-09-10.06:03:47.094>
actor = 'Mariatta'
assignee = 'serhiy.storchaka'
closed = True
closed_date = <Date 2017-09-10.06:03:47.096>
closer = 'Mariatta'
components = ['Tkinter']
creation = <Date 2015-11-20.17:24:48.504>
creator = 'Bryan.Oakley'
dependencies = []
files = []
hgrepos = []
issue_num = 25684
keywords = []
message_count = 8.0
messages = ['255001', '255099', '296330', '296576', '299548', '299578', '301801', '301802']
nosy_count = 5.0
nosy_names = ['gpolo', 'serhiy.storchaka', 'Bryan.Oakley', 'Mariatta', 'cheryl.sabella']
pr_nums = ['2276', '2959', '2960']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue25684'
versions = ['Python 2.7', 'Python 3.5', 'Python 3.6', 'Python 3.7']

[BryanOakley]

Original issue was brought to my attention by this SO question: http://stackoverflow.com/questions/33831289/ttk-optionmenu-displaying-check-mark-on-all-menus

The ttk.OptionMenu uses radiobuttons for the dropdown menu. However, because it doesn't set the variable attribute, they all get the default. If you have two or more OptionMenu instances, all of the radiobuttons are tied together. If you select the first item in the first OptionMenu, and the second item in the second OptionMenu, the dropdown menu for both will show the second item checked.

The solution is to add variable=self._variable when creating the menu radiobutton items.

[serhiy-storchaka]

Could you provide a patch Bryan?

[csabella]

I submitted a patch based on Bryan's original workaround on SO. Thanks.

[csabella]

I've now added unittests for this change.

[serhiy-storchaka]

New changeset a568e52 by Serhiy Storchaka (csabella) in branch 'master':
bpo-25684: ttk.OptionMenu radiobuttons weren't unique (bpo-2276)
a568e52

[serhiy-storchaka]

New changeset 2bf1586 by Serhiy Storchaka (csabella) in branch '3.6':
[3.6] bpo-25684: ttk.OptionMenu radiobuttons weren't unique (GH-2276) (bpo-2959)
2bf1586

[Mariatta]

New changeset e1847ea by Mariatta (Cheryl Sabella) in branch '2.7':
bpo-25684: ttk.OptionMenu radiobuttons weren't unique (GH-2276) (GH-2960)
e1847ea

[Mariatta]

Fixed and backported to 3.6 and 2.7.
Thanks, all!