Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!
Control Mouse
https://github.com/uoitdnalab/QEMU-Monitor-Control
How in QEMU send mouse_move, mouse_button, sendkey via some api
Turn on Mouse Cursor
qemu-system-x86_64 -show-cursor -enable-kvm -cdrom ubuntu-14.04.3-desktop-amd64.iso -m 2048
References
https://www.qemu.org/
https://github.com/uoitdnalab/QEMU-Monitor-Control