Comment by Gormo

I have this little one-liner mapped to a hotkey combo:

`bash -c 'xfce4-screenshooter -r -o zbarimg | gxmessage -title "Decoded Data" -fn "Consolas 12" -wrap -geometry 640x480 -file -'`

Works great if you have xfce4-screenshooter, gxmessage, and zbarimg installed. It allows you to draw a box around a screen region, screenshots it, decodes it via zbarimg, and pipes the output into a dialog box with copyable text.