tkinter geometry string +- when window ovelaps left or top of screen

[8baWnoVi]

BPO	31771
Nosy	@serhiy-storchaka

^{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 = None
closed_at = None
created_at = <Date 2017-10-12.13:26:16.602>
labels = ['3.7', 'type-feature', 'expert-tkinter', 'docs']
title = 'tkinter geometry string +- when window ovelaps left or top of screen'
updated_at = <Date 2017-10-12.13:37:55.646>
user = 'https://bugs.python.org/8baWnoVi'

bugs.python.org fields:

activity = <Date 2017-10-12.13:37:55.646>
actor = 'serhiy.storchaka'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Documentation', 'Tkinter']
creation = <Date 2017-10-12.13:26:16.602>
creator = '8baWnoVi'
dependencies = []
files = []
hgrepos = []
issue_num = 31771
keywords = []
message_count = 2.0
messages = ['304232', '304234']
nosy_count = 3.0
nosy_names = ['docs@python', 'serhiy.storchaka', '8baWnoVi']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue31771'
versions = ['Python 2.7', 'Python 3.6', 'Python 3.7']

Linked PRs

• gh-75952: Document negative offsets in tkinter geometry strings #152531
• [3.15] gh-75952: Document negative offsets in tkinter geometry strings (GH-152531) #153101
• [3.14] gh-75952: Document negative offsets in tkinter geometry strings (GH-152531) #153102
• [3.13] gh-75952: Document negative offsets in tkinter geometry strings (GH-152531) #153103

[8baWnoVi]

the root.geometry() top-level window method returns strings like "212x128+-9+-8" when the window is located in the top left corner. The documentation only describes geometry strings containing + or - location coordinates. If this is correct behaviour, the documentation should provide a better description of the syntax - perhaps a regular expression such as: "\d+x\d+(\+|-|\+-)\d+(\+|-|\+-)\d+" and some text indicating that a +- coordinate indicates a value to the left of or above the screen.

Tested Linux Mint 18, Python 3.5.3, tkinter 8.6

Behaviour is consistent with python 2.7 Tkinter 8.6

[serhiy-storchaka]

Tkinter is just a wrapper around the Tk library. It returns what Tk returns. See Tk documentation:

https://www.tcl.tk/man/tcl8.6/TkCmd/winfo.htm#M15
https://www.tcl.tk/man/tcl8.6/TkCmd/wm.htm#M42

If you want to improve Tkinter documentation, patches are welcome.