GooCanvas2 is a new canvas widget for use with Gtk3 that uses the Cairo 2d
library for drawing. This is a simple and basic implementation of this
wonderful Canvas widget.

For more informations see
https://wiki.gnome.org/action/show/Projects/GooCanvas

For instructions, how to use GooCanvas2, please study the API reference at
https://developer.gnome.org/goocanvas/unstable/ for now. A perl-specific
documentation will perhaps come in later versions. But applying the C
documentation should be no problem.