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# -*- coding: utf-8 -*-
# This file is part of pygal
#
# A python svg graph plotting library
# Copyright © 2012-2016 Kozea
#
# This library is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# This library 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with pygal. If not, see <http://www.gnu.org/licenses/>.
"""
XY Line graph: Plot a set of couple data points (x, y) connected by
straight segments.
"""
from functools import reduce
from pygal.graph.dual import Dual
from pygal.graph.line import Line
from pygal.util import cached_property, compose, ident
class XY(Line, Dual):
"""XY Line graph class"""
_x_adapters = []
@cached_property
def xvals(self):
"""All x values"""
return [
val[0] for serie in self.all_series for val in serie.values
if val[0] is not None
]
@cached_property
def yvals(self):
"""All y values"""
return [
val[1] for serie in self.series for val in serie.values
if val[1] is not None
]
@cached_property
def _min(self):
"""Getter for the minimum series value"""
return (
self.range[0] if (self.range and self.range[0] is not None) else
(min(self.yvals) if self.yvals else None)
)
@cached_property
def _max(self):
"""Getter for the maximum series value"""
return (
self.range[1] if (self.range and self.range[1] is not None) else
(max(self.yvals) if self.yvals else None)
)
def _compute(self):
"""Compute x/y min and max and x/y scale and set labels"""
if self.xvals:
if self.xrange:
x_adapter = reduce(compose, self._x_adapters) if getattr(
self, '_x_adapters', None
) else ident
xmin = x_adapter(self.xrange[0])
xmax = x_adapter(self.xrange[1])
else:
xmin = min(self.xvals)
xmax = max(self.xvals)
xrng = (xmax - xmin)
else:
xrng = None
if self.yvals:
ymin = self._min
ymax = self._max
if self.include_x_axis:
ymin = min(ymin or 0, 0)
ymax = max(ymax or 0, 0)
yrng = (ymax - ymin)
else:
yrng = None
for serie in self.all_series:
serie.points = serie.values
if self.interpolate:
vals = list(
zip(
*sorted(
filter(lambda t: None not in t, serie.points),
key=lambda x: x[0]
)
)
)
serie.interpolated = self._interpolate(vals[0], vals[1])
if self.interpolate:
self.xvals = [
val[0] for serie in self.all_series
for val in serie.interpolated
]
self.yvals = [
val[1] for serie in self.series for val in serie.interpolated
]
if self.xvals:
xmin = min(self.xvals)
xmax = max(self.xvals)
xrng = (xmax - xmin)
else:
xrng = None
# these values can also be 0 (zero), so testing explicitly for None
if xrng is not None:
self._box.xmin, self._box.xmax = xmin, xmax
if yrng is not None:
self._box.ymin, self._box.ymax = ymin, ymax
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