From: Antonio Ospite <ao2@ao2.it>
Date: Tue, 26 Jun 2018 13:42:26 +0000 (+0200)
Subject: diagram: move draw_rect_from_center to the generic Diagram class
X-Git-Url: https://git.ao2.it/flexagon-toolkit.git/commitdiff_plain/33f6577dfdb6b5f075c913b0239c5fa20e21b7a5?hp=33f6577dfdb6b5f075c913b0239c5fa20e21b7a5

diagram: move draw_rect_from_center to the generic Diagram class

Move draw_rect_from_center from cairo_diagram.py to diagram.py as it
does not depend on any specific backend.
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