This is derived from the Qt port of engrampa, a gnome file-roller derivative.
Engrampa: https://github.com/mate-desktop/engrampa/
File Roller: http://fileroller.sourceforge.net/

The original authors of engrampa and file-roller:

MATE developers:
  Perberos <perberos@gmail.com>
  Steve Zesch <stevezesch2@gmail.com>
  Stefano Karapetsas <stefano@karapetsas.com>

Main GNOME developers:
  Paolo Bacchilega <paolo.bacchilega@libero.it>

GNOME Contributors:
  Claudio Bley <bley@cs.uni-magdeburg.de> 	Patch to cope with systems that
						do not have FNM_CASEFOLD 
						defined.
  Shaun McCance <shaunm@wolfram.com> 		Zoo archives support.
  Daniel Brodie <daniel@brodienet.com>          ISO images support.

The Qt port is done by LXQt developers:
  Copyright 2018 Hong Jen-Yee (PCMan) <pcman.tw@gmail.com>
