/usr/lib/python3/dist-packages/mpl_toolkits/axisartist/axisline_style.py is in python3-matplotlib 2.0.0+dfsg1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | from __future__ import (absolute_import, division, print_function,
unicode_literals)
import six
from matplotlib.patches import _Style, FancyArrowPatch
from matplotlib.transforms import IdentityTransform
from matplotlib.path import Path
import numpy as np
class _FancyAxislineStyle(object):
class SimpleArrow(FancyArrowPatch):
"""
The artist class that will be returned for SimpleArrow style.
"""
_ARROW_STYLE = "->"
def __init__(self, axis_artist, line_path, transform,
line_mutation_scale):
self._axis_artist = axis_artist
self._line_transform = transform
self._line_path = line_path
self._line_mutation_scale = line_mutation_scale
FancyArrowPatch.__init__(self,
path=self._line_path,
arrowstyle=self._ARROW_STYLE,
arrow_transmuter=None,
patchA=None,
patchB=None,
shrinkA=0.,
shrinkB=0.,
mutation_scale=line_mutation_scale,
mutation_aspect=None,
transform=IdentityTransform(),
)
def set_line_mutation_scale(self, scale):
self.set_mutation_scale(scale*self._line_mutation_scale)
def _extend_path(self, path, mutation_size=10):
"""
Extend the path to make a room for drawing arrow.
"""
from matplotlib.bezier import get_cos_sin
x0, y0 = path.vertices[-2]
x1, y1 = path.vertices[-1]
cost, sint = get_cos_sin(x0, y0, x1, y1)
d = mutation_size * 1.
x2, y2 = x1 + cost*d, y1+sint*d
if path.codes is None:
_path = Path(np.concatenate([path.vertices, [[x2, y2]]]))
else:
_path = Path(np.concatenate([path.vertices, [[x2, y2]]]),
np.concatenate([path.codes, [Path.LINETO]]))
return _path
def set_path(self, path):
self._line_path = path
def draw(self, renderer):
"""
Draw the axis line.
1) transform the path to the display coordinate.
2) extend the path to make a room for arrow
3) update the path of the FancyArrowPatch.
4) draw
"""
path_in_disp = self._line_transform.transform_path(self._line_path)
mutation_size = self.get_mutation_scale() #line_mutation_scale()
extented_path = self._extend_path(path_in_disp,
mutation_size=mutation_size)
self._path_original = extented_path
FancyArrowPatch.draw(self, renderer)
class FilledArrow(SimpleArrow):
"""
The artist class that will be returned for SimpleArrow style.
"""
_ARROW_STYLE = "-|>"
class AxislineStyle(_Style):
"""
:class:`AxislineStyle` is a container class which defines style classes
for AxisArtists.
An instance of any axisline style class is an callable object,
whose call signature is ::
__call__(self, axis_artist, path, transform)
When called, this should return a mpl artist with following
methods implemented. ::
def set_path(self, path):
# set the path for axisline.
def set_line_mutation_scale(self, scale):
# set the scale
def draw(self, renderer):
# draw
"""
_style_list = {}
class _Base(object):
# The derived classes are required to be able to be initialized
# w/o arguments, i.e., all its argument (except self) must have
# the default values.
def __init__(self):
"""
initialization.
"""
super(AxislineStyle._Base, self).__init__()
def __call__(self, axis_artist, transform):
"""
Given the AxisArtist instance, and transform for the path
(set_path method), return the mpl artist for drawing the axis line.
"""
return self.new_line(axis_artist, transform)
class SimpleArrow(_Base):
"""
A simple arrow.
"""
ArrowAxisClass = _FancyAxislineStyle.SimpleArrow
def __init__(self, size=1):
"""
*size*
size of the arrow as a fraction of the ticklabel size.
"""
self.size = size
super(AxislineStyle.SimpleArrow, self).__init__()
def new_line(self, axis_artist, transform):
linepath = Path([(0,0), (0, 1)])
axisline = self.ArrowAxisClass(axis_artist, linepath, transform,
line_mutation_scale=self.size)
return axisline
_style_list["->"] = SimpleArrow
class FilledArrow(SimpleArrow):
ArrowAxisClass = _FancyAxislineStyle.FilledArrow
_style_list["-|>"] = FilledArrow
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