/usr/lib/python3/dist-packages/pygal/graph/stackedbar.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 | # -*- 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/>.
"""
Stacked Bar chart: Like a bar chart but with all series stacking
on top of the others instead of being displayed side by side.
"""
from __future__ import division
from pygal.adapters import none_to_zero
from pygal.graph.bar import Bar
class StackedBar(Bar):
"""Stacked Bar graph class"""
_adapters = [none_to_zero]
def _get_separated_values(self, secondary=False):
"""Separate values between positives and negatives stacked"""
series = self.secondary_series if secondary else self.series
transposed = list(zip(*[serie.values for serie in series]))
positive_vals = [sum([
val for val in vals
if val is not None and val >= self.zero])
for vals in transposed]
negative_vals = [sum([
val
for val in vals
if val is not None and val < self.zero])
for vals in transposed]
return positive_vals, negative_vals
def _compute_box(self, positive_vals, negative_vals):
"""Compute Y min and max"""
if self.range and self.range[0] is not None:
self._box.ymin = self.range[0]
else:
self._box.ymin = negative_vals and min(
min(negative_vals), self.zero) or self.zero
if self.range and self.range[1] is not None:
self._box.ymax = self.range[1]
else:
self._box.ymax = positive_vals and max(
max(positive_vals), self.zero) or self.zero
def _compute(self):
"""Compute y min and max and y scale and set labels"""
positive_vals, negative_vals = self._get_separated_values()
if self.logarithmic:
positive_vals = list(filter(
lambda x: x > self.zero, positive_vals))
negative_vals = list(filter(
lambda x: x > self.zero, negative_vals))
self._compute_box(positive_vals, negative_vals)
positive_vals = positive_vals or [self.zero]
negative_vals = negative_vals or [self.zero]
self._x_pos = [
x / self._len for x in range(self._len + 1)
] if self._len > 1 else [0, 1] # Center if only one value
self._points(self._x_pos)
self.negative_cumulation = [0] * self._len
self.positive_cumulation = [0] * self._len
if self.secondary_series:
positive_vals, negative_vals = self._get_separated_values(True)
positive_vals = positive_vals or [self.zero]
negative_vals = negative_vals or [self.zero]
self.secondary_negative_cumulation = [0] * self._len
self.secondary_positive_cumulation = [0] * self._len
self._pre_compute_secondary(positive_vals, negative_vals)
self._x_pos = [(i + .5) / self._len for i in range(self._len)]
def _pre_compute_secondary(self, positive_vals, negative_vals):
"""Compute secondary y min and max"""
self._secondary_min = (negative_vals and min(
min(negative_vals), self.zero)) or self.zero
self._secondary_max = (positive_vals and max(
max(positive_vals), self.zero)) or self.zero
def _bar(self, serie, parent, x, y, i, zero, secondary=False):
"""Internal stacking bar drawing function"""
if secondary:
cumulation = (self.secondary_negative_cumulation
if y < self.zero else
self.secondary_positive_cumulation)
else:
cumulation = (self.negative_cumulation
if y < self.zero else
self.positive_cumulation)
zero = cumulation[i]
cumulation[i] = zero + y
if zero == 0:
zero = self.zero
y -= self.zero
y += zero
width = (self.view.x(1) - self.view.x(0)) / self._len
x, y = self.view((x, y))
y = y or 0
series_margin = width * self._series_margin
x += series_margin
width -= 2 * series_margin
if self.secondary_series:
width /= 2
x += int(secondary) * width
serie_margin = width * self._serie_margin
x += serie_margin
width -= 2 * serie_margin
height = self.view.y(zero) - y
r = serie.rounded_bars * 1 if serie.rounded_bars else 0
self.svg.transposable_node(
parent, 'rect',
x=x, y=y, rx=r, ry=r, width=width, height=height,
class_='rect reactive tooltip-trigger')
return x, y, width, height
def _plot(self):
"""Draw bars for series and secondary series"""
for serie in self.series[::-1 if self.stack_from_top else 1]:
self.bar(serie)
for serie in self.secondary_series[::-1 if self.stack_from_top else 1]:
self.bar(serie, True)
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