New submission from Dominic Mayers <dominic_may...@yahoo.com>:
Currently, it's not possible to center or change the coordinates in anyway of
an askstring, askfloat or askinteger dialog in simpledialog.py. One can see
this by looking at the code:
if parent.winfo_viewable():
self.transient(parent)
if title:
self.title(title)
self.parent = parent
self.result = None
body = Frame(self)
self.initial_focus = self.body(body)
body.pack(padx=5, pady=5)
self.buttonbox()
if not self.initial_focus:
self.initial_focus = self
self.protocol("WM_DELETE_WINDOW", self.cancel)
if self.parent is not None:
self.geometry("+%d+%d" % (parent.winfo_rootx()+50,
parent.winfo_rooty()+50))
Here self.parent is never None, because the first statement would create a run
time error if parent was None. So, the geometry always depends on the parent.
Moreover, if the parent is not viewable, `parent.winfo_rootx()` and
`parent.winfo_rooty()` are both 0. So, we can only set the coordinates of a
simple dialog using a viewable parent. This contradicts a bit "simple" in
"simpledialog". For example, what about an application that does not have a
root window, like git for example, but, which unlike git, needs to create
simple dialogs in some occasions.
I am aware that a messagebox does not use the code that is presented above, but
a messagebox is not a simple dialog - it's only a message.
I am also aware of the class SimpleDialog, which also does not use this code,
but it only works with buttons. It's not like askstring, askinteger and
askfloat.
----------
messages: 359147
nosy: dominic108
priority: normal
severity: normal
status: open
title: In tkinter, simple dialogs, askstrings, etc. with flexible coordinates
and no viewable parent.
type: enhancement
versions: Python 3.9
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue39177>
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