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pygal
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Added Pie charts to the testing modules, and fixed the bugs elicited by the tests.

pull/8/head
jaraco 17 years ago
parent
eb963cda81
commit
3ddf22adfe
3 changed files with 64 additions and 27 deletions
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  1. 54
      lib/SVG/Pie.py
  2. 16
      test/testing.py
  3. 21
      test/testing.rb

54
lib/SVG/Pie.py
Unescape View File

@ -3,6 +3,7 @@
# $Id$
import math
from operator import add
import SVG
def robust_add(a,b):
@ -11,6 +12,8 @@ def robust_add(a,b):
if b is None: b = 0
return a+b
RADIANS = math.pi/180
class Pie(SVG.Graph):
# === Create presentation quality SVG pie graphs easily
#
@ -116,21 +119,21 @@ class Pie(SVG.Graph):
"""
self.data = map(robust_add, self.data, data_descriptor['data'])
def _add_defs(self, defs):
def add_defs(self, defs):
"Add svg definitions"
gradient = self._create_element(
'filter',
dict(
id='dropshadow',
width=1.2,
height=1.2,
width='1.2',
height='1.2',
)
)
defs.appendChild(gradient)
blur = self._create_element(
'feGaussianBlur',
dict(
stdDeviation=4,
stdDeviation='4',
result='blur',
)
)
@ -149,18 +152,17 @@ class Pie(SVG.Graph):
['']
def keys(self):
total = reduce(operator.add, self.data)
total = reduce(add, self.data)
percent_scale = 100.0 / total
def key(field, value):
result = ' [%s]' % value
result = [field]
result.append('[%s]' % value)
if self.show_key_percent:
percent = str(round((v/total*100))) + '%'
result = ' '.join(result, percent)
return result
return map(key, zip(self.fields, self.data))
result.append(percent)
return ' '.join(result)
return map(key, self.fields, self.data)
RADIANS = math.pi/180
def draw_data(self):
self.graph = self._create_element('g')
self.root.appendChild(self.graph)
@ -203,13 +205,13 @@ class Pie(SVG.Graph):
x_end = radius+(math.sin(radians) * radius)
y_end = radius-(math.cos(radians) * radius)
percent_greater_fifty = int(percent>=50)
path = ' '.join(
path = ' '.join((
"M%(radius)s,%(radius)s",
"L%(x_start)s,%(y_start)s",
"A%(radius)s,%(radius)s",
"0,",
"%(percent_greater_fifty)s,1,",
"%(x_end)s %(y_end)s Z")
"%(x_end)s %(y_end)s Z"))
path = path % vars()
wedge = self._create_element(
@ -219,7 +221,7 @@ class Pie(SVG.Graph):
'class': 'fill%s' % (index+1),
})
)
foreground.appendChild(wedge)
self.foreground.appendChild(wedge)
translate = None
tx = 0
@ -232,7 +234,7 @@ class Pie(SVG.Graph):
'path',
dict(
d=path,
filter='url(%s)' % self.dropshadow,
filter='url(#dropshadow)',
style='fill: #ccc; stroke: none',
)
)
@ -246,19 +248,19 @@ class Pie(SVG.Graph):
style="fill:#fff; stroke:none;",
)
)
medground.appendChild(clear)
midground.appendChild(clear)
if self.expanded or (expand_greatest and value == max_value):
if self.expanded or (self.expand_greatest and value == max_value):
tx = (math.sin(radians) * self.expand_gap)
ty = -(math.cos(radians) * self.expand_gap)
translate = "translate( %(tx)s %(ty)s )" % vars()
wedge.setAttribute('transform', translate)
clear.setAtrtibute('transform', translate)
clear.setAttribute('transform', translate)
if self.show_shadow:
shadow_tx = self.shadow_offset + tx
shadow_ty = self.shadow_offset + ty
translate = 'translate( %(shadow_tx)s %(shadow_ty)s )'
translate = 'translate( %(shadow_tx)s %(shadow_ty)s )' % vars()
shadow.setAttribute('transform', translate)
if self.show_data_labels and value != 0:
@ -268,7 +270,7 @@ class Pie(SVG.Graph):
if self.show_actual_values:
label.append('[%s]' % value)
if self.show_percent:
label.append(round(percent)+'%')
label.append('%d%%' % round(percent))
label = ' '.join(label)
msr = math.sin(radians)
@ -280,7 +282,7 @@ class Pie(SVG.Graph):
tx += (msr * self.expand_gap)
ty -= (mcr * self.expand_gap)
label = self._create_element(
label_node = self._create_element(
'text',
dict({
'x':str(tx),
@ -289,10 +291,10 @@ class Pie(SVG.Graph):
'style':'stroke: #fff; stroke-width: 2;',
})
)
label.appendChild(self._doc.createTextNode(label))
foreground.appendChild(label)
label_node.appendChild(self._doc.createTextNode(label))
self.foreground.appendChild(label_node)
label = self._create_element(
label_node = self._create_element(
'text',
dict({
'x':str(tx),
@ -300,8 +302,8 @@ class Pie(SVG.Graph):
'class': 'dataPointLabel',
})
)
label.appendChild(self._doc.createTextNode(label))
foreground.appendChild(label)
label_node.appendChild(self._doc.createTextNode(label))
self.foreground.appendChild(label_node)
prev_percent += percent

16
test/testing.py
Unescape View File

@ -64,3 +64,19 @@ g.__dict__.update(options)
g.add_data(dict(data=[2,22,98,143,82], title='intermediate'))
g.add_data(dict(data=[2,26,106,193,105], title='old'))
open('VerticalBarLarge.py.svg', 'w').write(g.burn())
from SVG import Pie
g = Pie.Pie({})
options = dict(
width=640,
height=480,
fields=fields,
graph_title='Question 7',
expand_greatest = True,
show_data_labels = True,
)
g.__dict__.update(options)
g.add_data( { 'data': [ -2, 3, 1, 3, 1 ], 'title': 'Female' } )
g.add_data( { 'data': [ 0, 2, 1, 5, 4 ], 'title': 'Male' } )
open('Pie.py.svg', 'w').write(g.burn())

21
test/testing.rb
Unescape View File

@ -74,4 +74,23 @@ g.add_data({:data=>[2,26,106,193,105], :title=>'old'})
f = File.new('VerticalBarLarge.rb.svg', 'w')
f.write(g.burn())
f.close()
f.close()
require 'SVG/Graph/Pie'
g = SVG::Graph::Pie.new({
:width=>640,
:height=>480,
:fields=>fields,
:graph_title=>'Question 7',
:expand_greatest=>true,
:show_data_labels=>true,
})
g.add_data({:data=>[-2,3,1,3,1], :title=>'Female'})
g.add_data({:data=>[0,2,1,5,4], :title=>'Male'})
f = File.new('Pie.rb.svg', 'w')
f.write(g.burn())
f.close()

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