Optional halt cell execution until file selected

[jesseengel]

Hi, nice plugin!

I was wondering if there would be a way to halt the execution of the cell until a file is selected / callback activated. This would be helpful for situations where you are executing cells in order, and don't want the next cell to run until the filechooser has done its thing. I tried put a while loop with sleep until the callback happens, but then can't interact with the file chooser.

[crahan]

I'm not sure if widgets have the ability to interact with the notebook itself in that way. I'd be happy to investigate some options if you have come across any.

[ghost]

Anyone had any thoughts on how to achieve this? I'm writing an application which will be run exclusively in a jupyter notebook. I need the user to input a path to a file in a friendly way. There's no possibility of a proper gui so Tkinter won't work for this, and I really like ipyfilechooser, but want to get it to wait for the user selection, much like input() would.