[Tutor] What does 'Bind Return Key' do?

[Mike Barnett]

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:
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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.
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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 <matthew.polack at htlc.vic.edu.au> 
Sent: Sunday, April 28, 2019 4:49 AM
To: tutor at 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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