You'll find it discussed in a couple of places in the PySimpleGUI documentation.
For example, this was written about it under the Button Element section of the
docs:
--
The ENTER key :
The ENTER key is an important part of data entry for windows. There's a long
tradition of the enter key being used to quickly submit windows. PySimpleGUI
implements this by tying the ENTER key to the first button that closes or reads
a window.
The Enter Key can be "bound" to a particular button so that when the key is
pressed, it causes the window to return as if the button was clicked. This is
done using the bind_return_key parameter in the button calls.
If there are more than 1 button on a window, the FIRST button that is of type
Close window or Read window is used. First is determined by scanning the
window, top to bottom and left to right.
--
When questions like this arise on PySimpleGUI, I recommend pulling up the docs
and pressing Control-F to do a search.
@mike
-Original Message-
From: Matthew Polack
Sent: Sunday, April 28, 2019 4:49 AM
To: tutor@python.org
Subject: [Tutor] What does 'Bind Return Key' do?
Hi,
We're learning Python with PySimpleGUi and have used this example program...
https://github.com/PySimpleGUI/PySimpleGUI/blob/master/ProgrammingClassExamples/Win10%20versions/1d%20PSG%20(named%20input%20keys%20and%20catch%20errors).py
There is a mystery command that says:
[sg.ReadButton('Submit', bind_return_key = False)]]
If I change this 'Bind_Return_Key' value from False to True...or in fact delete
it entirely, it appears to make do difference whatsoever to the functioning of
the program that I can see...
Could someone explain what the purpose of this could be? I'm guessing it has to
have a reason to be there!
Thanks!
--
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