/usr/lib/python3/dist-packages/leather/shapes/dots.py is in python3-leather 0.3.3-1.
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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 | #!/usr/bin/env python
from collections import defaultdict
import xml.etree.ElementTree as ET
import six
from leather.data_types import Text
from leather.series import CategorySeries
from leather.shapes.base import Shape
from leather import theme
from leather.utils import DummySeries, X, Y
class Dots(Shape):
"""
Render a series of data as dots.
:param fill_color:
The color to fill the dots. You may also specify a
:func:`.style_function`. If not specified, default chart colors will be
used.
:param radius:
The radius of the rendered dots. Defaults to
:data:`.theme.default_dot_radius`. You may also specify a
:func:`.style_function`.
"""
def __init__(self, fill_color=None, radius=None):
self._fill_color = fill_color
self._radius = radius or theme.default_dot_radius
def validate_series(self, series):
"""
Verify this shape can be used to render a given series.
"""
if series.data_type(X) is Text or series.data_type(Y) is Text:
raise ValueError('Dots do not support Text values.')
return True
def to_svg(self, width, height, x_scale, y_scale, series, palette):
"""
Render dots to SVG elements.
"""
group = ET.Element('g')
group.set('class', 'series dots')
default_colors = defaultdict(lambda: next(palette))
for d in series.data():
if d.x is None or d.y is None:
continue
proj_x = x_scale.project(d.x, 0, width)
proj_y = y_scale.project(d.y, height, 0)
if callable(self._fill_color):
fill_color = self._fill_color(d)
elif self._fill_color:
fill_color = self._fill_color
else:
fill_color = default_colors[d.z]
if callable(self._radius):
radius = self._radius(d)
else:
radius = self._radius
group.append(ET.Element('circle',
cx=six.text_type(proj_x),
cy=six.text_type(proj_y),
r=six.text_type(radius),
fill=fill_color
))
return group
def legend_to_svg(self, series, palette):
"""
Render the legend entries for these shapes.
"""
items = []
if isinstance(series, CategorySeries):
for category in series.categories():
items.extend(Shape.legend_to_svg(self, DummySeries(category), palette))
else:
items.extend(Shape.legend_to_svg(self, series, palette))
return items
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