Checks whether a mouse is attached to (or detached from) USB port and runs script to toggle touchpad. Uses udev and libnotify.
Download the zipball or clone the repo:
git clone https://github.com/relthyg/touchpadtoggle.git
Copy the files to their corresponding folders and set file permissions (as root).
cp touchpadtoggle.sh /opt/bin
cp 70-touchpad.rules /etc/udev/rules.d
chmod a+x /opt/bin/touchpadtoggle.sh
Attach your mouse and pray that everything works fine.