I want to open a window when a barcode scanner scans something. The scanner operates like a keyboard so I get a string of information. I want to add a listener that can intercept keyboard input and open the window if it matches the barcode format. I am thinking I need to add like a hidden TextField in my view and then handle it from there. Any suggestions?

That sounds like a keylogger. So you want your app to be constantly running in the background, and getting access to all keyboard events so that it can process them and open a window when it detects a match? I very much hope that OS providers don't allow this to happen.

haha nothing like that. basically whenever the app is in focus and the user scans a QR code I want the app to handle the input and open a dialog