+#!/usr/bin/env python
+
+# YouRule: Onscreen Ruler Generator
+#
+# Copyright (C) 2007 Benjamin Mako Hill <mako@atdot.cc>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the Affero General Public License as published
+# by the Free Software Foundation, either version 1 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the Affero General Public License
+# along with this program. If not, see
+# <http://http://www.affero.org/oagpl.html>.
+
# define the length of things
from __future__ import division
import SVGdraw