/usr/lib/python3/dist-packages/pygal/graph/radar.py is in python3-pygal 2.4.0-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 | # -*- 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/>.
"""
Radar chart: As known as kiviat chart or spider chart is a polar line chart
useful for multivariate observation.
"""
from __future__ import division
from math import cos, pi
from pygal._compat import is_str
from pygal.adapters import none_to_zero, positive
from pygal.graph.line import Line
from pygal.util import cached_property, compute_scale, cut, deg, truncate
from pygal.view import PolarLogView, PolarView
class Radar(Line):
"""Rada graph class"""
_adapters = [positive, none_to_zero]
def __init__(self, *args, **kwargs):
"""Init custom vars"""
self._rmax = None
super(Radar, self).__init__(*args, **kwargs)
def _fill(self, values):
"""Add extra values to fill the line"""
return values
@cached_property
def _values(self):
"""Getter for series values (flattened)"""
if self.interpolate:
return [val[0] for serie in self.series
for val in serie.interpolated]
else:
return super(Line, self)._values
def _set_view(self):
"""Assign a view to current graph"""
if self.logarithmic:
view_class = PolarLogView
else:
view_class = PolarView
self.view = view_class(
self.width - self.margin_box.x,
self.height - self.margin_box.y,
self._box)
def _x_axis(self, draw_axes=True):
"""Override x axis to make it polar"""
if not self._x_labels or not self.show_x_labels:
return
axis = self.svg.node(self.nodes['plot'], class_="axis x web%s" % (
' always_show' if self.show_x_guides else ''
))
format_ = lambda x: '%f %f' % x
center = self.view((0, 0))
r = self._rmax
# Can't simply determine truncation
truncation = self.truncate_label or 25
for label, theta in self._x_labels:
major = label in self._x_labels_major
if not (self.show_minor_x_labels or major):
continue
guides = self.svg.node(axis, class_='guides')
end = self.view((r, theta))
self.svg.node(
guides, 'path',
d='M%s L%s' % (format_(center), format_(end)),
class_='%s%sline' % (
'axis ' if label == "0" else '',
'major ' if major else ''))
r_txt = (1 - self._box.__class__.margin) * self._box.ymax
pos_text = self.view((r_txt, theta))
text = self.svg.node(
guides, 'text',
x=pos_text[0],
y=pos_text[1],
class_='major' if major else '')
text.text = truncate(label, truncation)
if text.text != label:
self.svg.node(guides, 'title').text = label
else:
self.svg.node(
guides, 'title',
).text = self._x_format(theta)
angle = - theta + pi / 2
if cos(angle) < 0:
angle -= pi
text.attrib['transform'] = 'rotate(%f %s)' % (
self.x_label_rotation or deg(angle), format_(pos_text))
def _y_axis(self, draw_axes=True):
"""Override y axis to make it polar"""
if not self._y_labels or not self.show_y_labels:
return
axis = self.svg.node(self.nodes['plot'], class_="axis y web")
for label, r in reversed(self._y_labels):
major = r in self._y_labels_major
if not (self.show_minor_y_labels or major):
continue
guides = self.svg.node(axis, class_='%sguides' % (
'logarithmic ' if self.logarithmic else ''
))
if self.show_y_guides:
self.svg.line(
guides, [self.view((r, theta)) for theta in self._x_pos],
close=True,
class_='%sguide line' % (
'major ' if major else ''))
x, y = self.view((r, self._x_pos[0]))
x -= 5
text = self.svg.node(
guides, 'text',
x=x,
y=y,
class_='major' if major else ''
)
text.text = label
if self.y_label_rotation:
text.attrib['transform'] = "rotate(%d %f %f)" % (
self.y_label_rotation, x, y)
self.svg.node(
guides, 'title',
).text = self._y_format(r)
def _compute(self):
"""Compute r min max and labels position"""
delta = 2 * pi / self._len if self._len else 0
self._x_pos = [.5 * pi + i * delta for i in range(self._len + 1)]
for serie in self.all_series:
serie.points = [
(v, self._x_pos[i])
for i, v in enumerate(serie.values)]
if self.interpolate:
extended_x_pos = (
[.5 * pi - delta] + self._x_pos)
extended_vals = (serie.values[-1:] +
serie.values)
serie.interpolated = list(
map(tuple,
map(reversed,
self._interpolate(
extended_x_pos, extended_vals))))
# x labels space
self._box.margin *= 2
self._rmin = self.zero
self._rmax = self._max or 1
self._box.set_polar_box(self._rmin, self._rmax)
self._self_close = True
def _compute_y_labels(self):
y_pos = compute_scale(
self._rmin, self._rmax, self.logarithmic, self.order_min,
self.min_scale, self.max_scale / 2
)
if self.y_labels:
self._y_labels = []
for i, y_label in enumerate(self.y_labels):
if isinstance(y_label, dict):
pos = self._adapt(y_label.get('value'))
title = y_label.get('label', self._y_format(pos))
elif is_str(y_label):
pos = self._adapt(y_pos[i])
title = y_label
else:
pos = self._adapt(y_label)
title = self._y_format(pos)
self._y_labels.append((title, pos))
self._rmin = min(self._rmin, min(cut(self._y_labels, 1)))
self._rmax = max(self._rmax, max(cut(self._y_labels, 1)))
self._box.set_polar_box(self._rmin, self._rmax)
else:
self._y_labels = list(zip(map(self._y_format, y_pos), y_pos))
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