phitigra was added as an optional package in #30540.

To launch the editor:

sage: e = graph_editor()
sage: e.show()             # the editor widget appears

To retrieve the graph:

sage: G = e.get_graph()   # G is a copy of the drawn graph, both can be modified independently

Depends on #30540

CC: @kcrisman @fchapoton @dcoudert @dimpase @jfraymond @novoselt

Component: user interface

Author: Jean-Florent Raymond

Branch/Commit: 0549fa9

Reviewer: Matthias Koeppe, Kwankyu Lee

Issue created by migration from https://trac.sagemath.org/ticket/33639