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- Committer: Gerald Kaszuba
- Date: 2010-12-24 05:18:55 UTC
- Revision ID: git-v1:1a633e0584a557e812fae20deceaef514a515f62
gitignore compiled py files and setup.py build dir
- files added:
- .gitignore
- examples
- examples/helpers
- scripts
- test
- files modified:
- pygooglechart.py
added
removed
pygooglechart.py
1
"""
2
PyGoogleChart - A complete Python wrapper for the Google Chart API
3
4
http://pygooglechart.slowchop.com/
5
6
Copyright 2007 Gerald Kaszuba
7
8
This program is free software: you can redistribute it and/or modify
9
it under the terms of the GNU General Public License as published by
10
the Free Software Foundation, either version 3 of the License, or
11
(at your option) any later version.
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13
This program is distributed in the hope that it will be useful,
14
but WITHOUT ANY WARRANTY; without even the implied warranty of
15
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16
GNU General Public License for more details.
17
18
You should have received a copy of the GNU General Public License
19
along with this program. If not, see <http://www.gnu.org/licenses/>.
20
21
"""
22
23
import os
24
import urllib
25
import math
26
import random
27
import re
28
29
# Helper variables and functions
30
# -----------------------------------------------------------------------------
31
32
reo_colour = re.compile('^([A-Fa-f0-9]{2,2}){3,4}$')
33
34
def _check_colour(colour):
35
if not reo_colour.match(colour):
36
raise InvalidParametersException('Colours need to be in ' \
37
'RRGGBB or RRGGBBAA format. One of your colours has %s' % \
38
colour)
39
40
# Exception Classes
41
# -----------------------------------------------------------------------------
42
43
class PyGoogleChartException(Exception):
44
pass
45
46
class DataOutOfRangeException(PyGoogleChartException):
47
pass
48
49
class UnknownDataTypeException(PyGoogleChartException):
50
pass
51
52
class NoDataGivenException(PyGoogleChartException):
53
pass
54
55
class InvalidParametersException(PyGoogleChartException):
56
pass
57
58
# Data Classes
59
# -----------------------------------------------------------------------------
60
61
class Data(object):
62
def __init__(self, data):
63
assert(type(self) != Data) # This is an abstract class
64
self.data = data
65
66
class SimpleData(Data):
67
enc_map = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
68
def __repr__(self):
69
encoded_data = []
70
for data in self.data:
71
sub_data = []
72
for value in data:
73
if value is None:
74
sub_data.append('_')
75
elif value >= 0 and value <= SimpleData.max_value:
76
sub_data.append(SimpleData.enc_map[value])
77
else:
78
raise DataOutOfRangeException()
79
encoded_data.append(''.join(sub_data))
80
return 'chd=s:' + ','.join(encoded_data)
81
@staticmethod
82
def max_value():
83
return 61
84
85
class TextData(Data):
86
def __repr__(self):
87
encoded_data = []
88
for data in self.data:
89
sub_data = []
90
for value in data:
91
if value is None:
92
sub_data.append(-1)
93
elif value >= 0 and value <= TextData.max_value:
94
sub_data.append(str(float(value)))
95
else:
96
raise DataOutOfRangeException()
97
encoded_data.append(','.join(sub_data))
98
return 'chd=t:' + '|'.join(encoded_data)
99
@staticmethod
100
def max_value():
101
return 100
102
103
class ExtendedData(Data):
104
enc_map = \
105
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-.'
106
def __repr__(self):
107
encoded_data = []
108
enc_size = len(ExtendedData.enc_map)
109
for data in self.data:
110
sub_data = []
111
for value in data:
112
if value is None:
113
sub_data.append('__')
114
elif value >= 0 and value <= ExtendedData.max_value:
115
first, second = divmod(int(value), enc_size)
116
sub_data.append('%s%s' % (
117
ExtendedData.enc_map[first],
118
ExtendedData.enc_map[second]))
119
else:
120
raise DataOutOfRangeException( \
121
'Item #%i "%s" is out of range' % (data.index(value), \
122
value))
123
encoded_data.append(''.join(sub_data))
124
return 'chd=e:' + ','.join(encoded_data)
125
@staticmethod
126
def max_value():
127
return 4095
128
129
# Axis Classes
130
# -----------------------------------------------------------------------------
131
132
class Axis(object):
133
BOTTOM = 'x'
134
TOP = 't'
135
LEFT = 'y'
136
RIGHT = 'r'
137
TYPES = (BOTTOM, TOP, LEFT, RIGHT)
138
def __init__(self, axis, **kw):
139
assert(axis in Axis.TYPES)
140
self.has_style = False
141
self.index = None
142
self.positions = None
143
def set_index(self, index):
144
self.index = index
145
def set_positions(self, positions):
146
self.positions = positions
147
def set_style(self, colour, font_size=None, alignment=None):
148
_check_colour(colour)
149
self.colour = colour
150
self.font_size = font_size
151
self.alignment = alignment
152
self.has_style = True
153
def style_to_url(self):
154
bits = []
155
bits.append(str(self.index))
156
bits.append(self.colour)
157
if self.font_size is not None:
158
bits.append(str(self.font_size))
159
if self.alignment is not None:
160
bits.append(str(self.alignment))
161
return ','.join(bits)
162
def positions_to_url(self):
163
bits = []
164
bits.append(str(self.index))
165
bits += [ str(a) for a in self.positions ]
166
return ','.join(bits)
167
168
class LabelAxis(Axis):
169
def __init__(self, axis, values, **kwargs):
170
Axis.__init__(self, axis, **kwargs)
171
self.values = [ str(a) for a in values ]
172
def __repr__(self):
173
return '%i:|%s' % (self.index, '|'.join(self.values))
174
175
class RangeAxis(Axis):
176
def __init__(self, axis, low, high, **kwargs):
177
Axis.__init__(self, axis, **kwargs)
178
self.low = low
179
self.high = high
180
def __repr__(self):
181
return '%i,%s,%s' % (self.index, self.low, self.high)
182
183
# Chart Classes
184
# -----------------------------------------------------------------------------
185
186
class Chart(object):
187
188
BASE_URL = 'http://chart.apis.google.com/chart?'
189
BACKGROUND = 'bg'
190
CHART = 'c'
191
SOLID = 's'
192
LINEAR_GRADIENT = 'lg'
193
LINEAR_STRIPES = 'ls'
194
195
def __init__(self, width, height, title=None, legend=None, colours=None):
196
assert(type(self) != Chart) # This is an abstract class
197
assert(isinstance(width, int))
198
assert(isinstance(height, int))
199
self.width = width
200
self.height = height
201
self.data = []
202
self.set_title(title)
203
self.set_legend(legend)
204
self.set_colours(colours)
205
self.fill_types = {
206
Chart.BACKGROUND: None,
207
Chart.CHART: None,
208
}
209
self.fill_area = {
210
Chart.BACKGROUND: None,
211
Chart.CHART: None,
212
}
213
self.axis = {
214
Axis.TOP: None,
215
Axis.BOTTOM: None,
216
Axis.LEFT: None,
217
Axis.RIGHT: None,
218
}
219
self.markers = []
220
221
# URL generation
222
# -------------------------------------------------------------------------
223
224
def get_url(self):
225
url_bits = self.get_url_bits()
226
return self.BASE_URL + '&'.join(url_bits)
227
228
def get_url_bits(self):
229
url_bits = []
230
# required arguments
231
url_bits.append(self.type_to_url())
232
url_bits.append('chs=%ix%i' % (self.width, self.height))
233
url_bits.append(self.data_to_url())
234
# optional arguments
235
if self.title:
236
url_bits.append('chtt=%s' % self.title)
237
if self.legend:
238
url_bits.append('chdl=%s' % '|'.join(self.legend))
239
if self.colours:
240
url_bits.append('chco=%s' % ','.join(self.colours))
241
ret = self.fill_to_url()
242
if ret:
243
url_bits.append(ret)
244
ret = self.axis_to_url()
245
if ret:
246
url_bits.append(ret)
247
if self.markers:
248
url_bits.append(self.markers_to_url())
249
return url_bits
250
251
# Downloading
252
# -------------------------------------------------------------------------
253
def download(self, file_name):
254
open(file_name, 'wb').write(urllib.urlopen(self.get_url()).read())
255
256
# Simple settings
257
# -------------------------------------------------------------------------
258
259
def set_title(self, title):
260
if title:
261
self.title = urllib.quote(title)
262
else:
263
self.title = None
264
265
def set_legend(self, legend):
266
# legend needs to be a list, tuple or None
267
assert(isinstance(legend, list) or isinstance(legend, tuple) or
268
legend is None)
269
if legend:
270
self.legend = [ urllib.quote(a) for a in legend ]
271
else:
272
self.legend = None
273
274
# Chart colours
275
# -------------------------------------------------------------------------
276
277
def set_colours(self, colours):
278
# colours needs to be a list, tuple or None
279
assert(isinstance(colours, list) or isinstance(colours, tuple) or
280
colours is None)
281
# make sure the colours are in the right format
282
if colours:
283
for col in colours:
284
_check_colour(col)
285
self.colours = colours
286
287
# Background/Chart colours
288
# -------------------------------------------------------------------------
289
290
def fill_solid(self, area, colour):
291
assert(area in (Chart.BACKGROUND, Chart.CHART))
292
_check_colour(colour)
293
self.fill_area[area] = colour
294
self.fill_types[area] = Chart.SOLID
295
296
def _check_fill_linear(self, angle, *args):
297
assert(isinstance(args, list) or isinstance(args, tuple))
298
assert(angle >= 0 and angle <= 90)
299
assert(len(args) % 2 == 0)
300
args = list(args) # args is probably a tuple and we need to mutate
301
for a in xrange(len(args) / 2):
302
col = args[a * 2]
303
offset = args[a * 2 + 1]
304
_check_colour(col)
305
assert(offset >= 0 and offset <= 1)
306
args[a * 2 + 1] = str(args[a * 2 + 1])
307
return args
308
309
def fill_linear_gradient(self, area, angle, *args):
310
assert(area in (Chart.BACKGROUND, Chart.CHART))
311
args = self._check_fill_linear(angle, *args)
312
self.fill_types[area] = Chart.LINEAR_GRADIENT
313
self.fill_area[area] = ','.join([str(angle)] + args)
314
315
def fill_linear_stripes(self, area, angle, *args):
316
assert(area in (Chart.BACKGROUND, Chart.CHART))
317
args = self._check_fill_linear(angle, *args)
318
self.fill_types[area] = Chart.LINEAR_STRIPES
319
self.fill_area[area] = ','.join([str(angle)] + args)
320
321
def fill_to_url(self):
322
areas = []
323
for area in (Chart.BACKGROUND, Chart.CHART):
324
if self.fill_types[area]:
325
areas.append('%s,%s,%s' % (area, self.fill_types[area], \
326
self.fill_area[area]))
327
if areas:
328
return 'chf=' + '|'.join(areas)
329
330
# Data
331
# -------------------------------------------------------------------------
332
333
def data_class_detection(self, data):
334
"""
335
Detects and returns the data type required based on the range of the
336
data given. The data given must be lists of numbers within a list.
337
"""
338
assert(isinstance(data, list) or isinstance(data, tuple))
339
max_value = None
340
for a in data:
341
assert(isinstance(a, list) or isinstance(a, tuple))
342
if max_value is None or max(a) > max_value:
343
max_value = max(a)
344
for data_class in (SimpleData, TextData, ExtendedData):
345
if max_value <= data_class.max_value():
346
return data_class
347
raise DataOutOfRangeException()
348
349
def add_data(self, data):
350
self.data.append(data)
351
352
def data_to_url(self, data_class=None):
353
if not data_class:
354
data_class = self.data_class_detection(self.data)
355
if not issubclass(data_class, Data):
356
raise UnknownDataTypeException()
357
return repr(data_class(self.data))
358
359
# Axis Labels
360
# -------------------------------------------------------------------------
361
362
def set_axis_labels(self, axis, values):
363
assert(axis in Axis.TYPES)
364
self.axis[axis] = LabelAxis(axis, values)
365
366
def set_axis_range(self, axis, low, high):
367
assert(axis in Axis.TYPES)
368
self.axis[axis] = RangeAxis(axis, low, high)
369
370
def set_axis_positions(self, axis, positions):
371
assert(axis in Axis.TYPES)
372
if not self.axis[axis]:
373
raise InvalidParametersException('Please create an axis first')
374
self.axis[axis].set_positions(positions)
375
376
def set_axis_style(self, axis, colour, font_size=None, alignment=None):
377
assert(axis in Axis.TYPES)
378
if not self.axis[axis]:
379
raise InvalidParametersException('Please create an axis first')
380
self.axis[axis].set_style(colour, font_size, alignment)
381
382
def axis_to_url(self):
383
available_axis = []
384
label_axis = []
385
range_axis = []
386
positions = []
387
styles = []
388
index = -1
389
for position, axis in self.axis.items():
390
if not axis:
391
continue
392
index += 1
393
axis.set_index(index)
394
available_axis.append(position)
395
if isinstance(axis, RangeAxis):
396
range_axis.append(repr(axis))
397
if isinstance(axis, LabelAxis):
398
label_axis.append(repr(axis))
399
if axis.positions:
400
positions.append(axis.positions_to_url())
401
if axis.has_style:
402
styles.append(axis.style_to_url())
403
if not available_axis:
404
return
405
url_bits = []
406
url_bits.append('chxt=%s' % ','.join(available_axis))
407
if label_axis:
408
url_bits.append('chxl=%s' % '|'.join(label_axis))
409
if range_axis:
410
url_bits.append('chxr=%s' % '|'.join(range_axis))
411
if positions:
412
url_bits.append('chxp=%s' % '|'.join(positions))
413
if styles:
414
url_bits.append('chxs=%s' % '|'.join(styles))
415
return '&'.join(url_bits)
416
417
# Markers, Ranges and Fill area (chm)
418
# -------------------------------------------------------------------------
419
420
def markers_to_url(self):
421
return 'chm=%s' % '|'.join([ ','.join(a) for a in self.markers ])
422
423
def add_marker(self, index, point, marker_type, colour, size):
424
self.markers.append((marker_type, colour, str(index), str(point), \
425
str(size)))
426
427
def add_horizontal_range(self, colour, start, stop):
428
self.markers.append(('r', colour, '1', str(start), str(stop)))
429
430
def add_vertical_range(self, colour, start, stop):
431
self.markers.append(('R', colour, '1', str(start), str(stop)))
432
433
def add_fill_range(self, colour, index_start, index_end):
434
self.markers.append(('b', colour, str(index_start), str(index_end), \
435
'1'))
436
437
def add_fill_simple(self, colour):
438
self.markers.append(('B', colour, '1', '1', '1'))
439
440
class ScatterChart(Chart):
441
def __init__(self, *args, **kwargs):
442
Chart.__init__(self, *args, **kwargs)
443
def type_to_url(self):
444
return 'cht=s'
445
446
447
class LineChart(Chart):
448
def __init__(self, *args, **kwargs):
449
Chart.__init__(self, *args, **kwargs)
450
self.line_styles = {}
451
self.grid = None
452
def set_line_style(self, index, thickness=1, line_segment=None, \
453
blank_segment=None):
454
value = []
455
value.append(str(thickness))
456
if line_segment:
457
value.append(str(line_segment))
458
value.append(str(blank_segment))
459
self.line_styles[index] = value
460
def set_grid(self, x_step, y_step, line_segment=1, \
461
blank_segment=0):
462
self.grid = '%s,%s,%s,%s' % (x_step, y_step, line_segment, \
463
blank_segment)
464
def get_url_bits(self):
465
url_bits = Chart.get_url_bits(self)
466
if self.line_styles:
467
style = []
468
# for index, values in self.line_style.items():
469
for index in xrange(max(self.line_styles) + 1):
470
if index in self.line_styles:
471
values = self.line_styles[index]
472
else:
473
values = ('1', )
474
style.append(','.join(values))
475
url_bits.append('chls=%s' % '|'.join(style))
476
if self.grid:
477
url_bits.append('chg=%s' % self.grid)
478
return url_bits
479
480
class SimpleLineChart(LineChart):
481
def type_to_url(self):
482
return 'cht=lc'
483
484
class XYLineChart(LineChart):
485
def type_to_url(self):
486
return 'cht=lxy'
487
488
class BarChart(Chart):
489
def __init__(self, *args, **kwargs):
490
assert(type(self) != BarChart) # This is an abstract class
491
Chart.__init__(self, *args, **kwargs)
492
self.bar_width = None
493
def set_bar_width(self, bar_width):
494
self.bar_width = bar_width
495
def get_url_bits(self):
496
url_bits = Chart.get_url_bits(self)
497
url_bits.append('chbh=%i' % self.bar_width)
498
return url_bits
499
500
class StackedHorizontalBarChart(BarChart):
501
def type_to_url(self):
502
return 'cht=bhs'
503
504
class StackedVerticalBarChart(BarChart):
505
def type_to_url(self):
506
return 'cht=bvs'
507
508
class GroupedBarChart(BarChart):
509
def __init__(self, *args, **kwargs):
510
assert(type(self) != GroupedBarChart) # This is an abstract class
511
BarChart.__init__(self, *args, **kwargs)
512
self.bar_spacing = None
513
def set_bar_spacing(self, spacing):
514
self.bar_spacing = spacing
515
def get_url_bits(self):
516
# Skip 'BarChart.get_url_bits' and call Chart directly so the parent
517
# doesn't add "chbh" before we do.
518
url_bits = Chart.get_url_bits(self)
519
if self.bar_spacing is not None:
520
if self.bar_width is None:
521
raise InvalidParametersException('Bar width is required to ' \
522
'be set when setting spacing')
523
url_bits.append('chbh=%i,%i' % (self.bar_width, self.bar_spacing))
524
else:
525
url_bits.append('chbh=%i' % self.bar_width)
526
return url_bits
527
528
class GroupedHorizontalBarChart(GroupedBarChart):
529
def type_to_url(self):
530
return 'cht=bhg'
531
532
class GroupedVerticalBarChart(GroupedBarChart):
533
def type_to_url(self):
534
return 'cht=bvg'
535
536
class PieChart(Chart):
537
def __init__(self, *args, **kwargs):
538
assert(type(self) != PieChart) # This is an abstract class
539
Chart.__init__(self, *args, **kwargs)
540
self.pie_labels = []
541
def set_pie_labels(self, labels):
542
self.pie_labels = labels
543
def get_url_bits(self):
544
url_bits = Chart.get_url_bits(self)
545
if self.pie_labels:
546
url_bits.append('chl=%s' % '|'.join(self.pie_labels))
547
return url_bits
548
549
class PieChart2D(PieChart):
550
def type_to_url(self):
551
return 'cht=p'
552
553
class PieChart3D(PieChart):
554
def type_to_url(self):
555
return 'cht=p3'
556
557
class VennChart(Chart):
558
def type_to_url(self):
559
return 'cht=v'
560
561
def test():
562
chart = GroupedVerticalBarChart(320, 200)
563
chart = PieChart2D(320, 200)
564
chart = ScatterChart(320, 200)
565
chart = SimpleLineChart(320, 200)
566
sine_data = [ math.sin(float(a) / 10) * 2000 + 2000 for a in xrange(100) ]
567
random_data = [ a * random.random() * 30 for a in xrange(40) ]
568
random_data2 = [ random.random() * 4000 for a in xrange(10) ]
569
# chart.set_bar_width(50)
570
# chart.set_bar_spacing(0)
571
chart.add_data(sine_data)
572
chart.add_data(random_data)
573
chart.add_data(random_data2)
574
# chart.set_line_style(1, thickness=2)
575
# chart.set_line_style(2, line_segment=10, blank_segment=5)
576
# chart.set_title('heloooo')
577
# chart.set_legend(('sine wave', 'random * x'))
578
# chart.set_colours(('ee2000', 'DDDDAA', 'fF03f2'))
579
# chart.fill_solid(Chart.BACKGROUND, '123456')
580
# chart.fill_linear_gradient(Chart.CHART, 20, '004070', 1, '300040', 0,
581
# 'aabbcc00', 0.5)
582
# chart.fill_linear_stripes(Chart.CHART, 20, '204070', .2, '300040', .2,
583
# 'aabbcc00', 0.2)
584
chart.set_axis_range(Axis.LEFT, 0, 10)
585
chart.set_axis_range(Axis.RIGHT, 5, 30)
586
chart.set_axis_labels(Axis.BOTTOM, [1, 25, 95])
587
chart.set_axis_positions(Axis.BOTTOM, [1, 25, 95])
588
chart.set_axis_style(Axis.BOTTOM, 'FFFFFF', 15)
589
590
# chart.set_pie_labels(('apples', 'oranges', 'bananas'))
591
592
# chart.set_grid(10, 10)
593
594
# for a in xrange(0, 100, 10):
595
# chart.add_marker(1, a, 'a', 'AACA20', 10)
596
597
chart.add_horizontal_range('00A020', .2, .5)
598
chart.add_vertical_range('00c030', .2, .4)
599
600
chart.add_fill_simple('303030A0')
601
602
603
chart = SimpleLineChart(320, 200)
604
data = [ 1, 5, 30, 10, 25 ]
605
chart.add_data(data)
606
chart.set_title('Hello World!')
607
chart.set_axis_range(Axis.LEFT, 0, 10)
608
print chart.get_url()
609
chart.download('hello.png')
610
611
url = chart.get_url()
612
print url
613
if 0:
614
data = urllib.urlopen(chart.get_url()).read()
615
open('meh.png', 'wb').write(data)
616
os.system('start meh.png')
617
618
if __name__ == '__main__':
619
test()
620
1
"""
2
pygooglechart - A complete Python wrapper for the Google Chart API
3
4
http://pygooglechart.slowchop.com/
5
6
Copyright 2007-2009 Gerald Kaszuba
7
8
This program is free software: you can redistribute it and/or modify
9
it under the terms of the GNU General Public License as published by
10
the Free Software Foundation, either version 3 of the License, or
11
(at your option) any later version.
12
13
This program is distributed in the hope that it will be useful,
14
but WITHOUT ANY WARRANTY; without even the implied warranty of
15
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16
GNU General Public License for more details.
17
18
You should have received a copy of the GNU General Public License
19
along with this program. If not, see <http://www.gnu.org/licenses/>.
20
21
"""
22
from __future__ import division
23
24
import os
25
import urllib
26
import urllib2
27
import math
28
import random
29
import re
30
import warnings
31
import copy
32
33
# Helper variables and functions
34
# -----------------------------------------------------------------------------
35
36
__version__ = '0.3.0'
37
__author__ = 'Gerald Kaszuba'
38
39
reo_colour = re.compile('^([A-Fa-f0-9]{2,2}){3,4}$')
40
41
def _check_colour(colour):
42
if not reo_colour.match(colour):
43
raise InvalidParametersException('Colours need to be in ' \
44
'RRGGBB or RRGGBBAA format. One of your colours has %s' % \
45
colour)
46
47
48
def _reset_warnings():
49
"""Helper function to reset all warnings. Used by the unit tests."""
50
globals()['__warningregistry__'] = None
51
52
53
# Exception Classes
54
# -----------------------------------------------------------------------------
55
56
57
class PyGoogleChartException(Exception):
58
pass
59
60
61
class DataOutOfRangeException(PyGoogleChartException):
62
pass
63
64
65
class UnknownDataTypeException(PyGoogleChartException):
66
pass
67
68
69
class NoDataGivenException(PyGoogleChartException):
70
pass
71
72
73
class InvalidParametersException(PyGoogleChartException):
74
pass
75
76
77
class BadContentTypeException(PyGoogleChartException):
78
pass
79
80
81
class AbstractClassException(PyGoogleChartException):
82
pass
83
84
85
class UnknownChartType(PyGoogleChartException):
86
pass
87
88
class UnknownCountryCodeException(PyGoogleChartException):
89
pass
90
91
# Data Classes
92
# -----------------------------------------------------------------------------
93
94
95
class Data(object):
96
97
def __init__(self, data):
98
if type(self) == Data:
99
raise AbstractClassException('This is an abstract class')
100
self.data = data
101
102
@classmethod
103
def float_scale_value(cls, value, range):
104
lower, upper = range
105
assert(upper > lower)
106
scaled = (value - lower) * (cls.max_value / (upper - lower))
107
return scaled
108
109
@classmethod
110
def clip_value(cls, value):
111
return max(0, min(value, cls.max_value))
112
113
@classmethod
114
def int_scale_value(cls, value, range):
115
return int(round(cls.float_scale_value(value, range)))
116
117
@classmethod
118
def scale_value(cls, value, range):
119
scaled = cls.int_scale_value(value, range)
120
clipped = cls.clip_value(scaled)
121
Data.check_clip(scaled, clipped)
122
return clipped
123
124
@staticmethod
125
def check_clip(scaled, clipped):
126
if clipped != scaled:
127
warnings.warn('One or more of of your data points has been '
128
'clipped because it is out of range.')
129
130
131
class SimpleData(Data):
132
133
max_value = 61
134
enc_map = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
135
136
def __repr__(self):
137
encoded_data = []
138
for data in self.data:
139
sub_data = []
140
for value in data:
141
if value is None:
142
sub_data.append('_')
143
elif value >= 0 and value <= self.max_value:
144
sub_data.append(SimpleData.enc_map[value])
145
else:
146
raise DataOutOfRangeException('cannot encode value: %d'
147
% value)
148
encoded_data.append(''.join(sub_data))
149
return 'chd=s:' + ','.join(encoded_data)
150
151
152
class TextData(Data):
153
154
max_value = 100
155
156
def __repr__(self):
157
encoded_data = []
158
for data in self.data:
159
sub_data = []
160
for value in data:
161
if value is None:
162
sub_data.append(-1)
163
elif value >= 0 and value <= self.max_value:
164
sub_data.append("%.1f" % float(value))
165
else:
166
raise DataOutOfRangeException()
167
encoded_data.append(','.join(sub_data))
168
return 'chd=t:' + '%7c'.join(encoded_data)
169
170
@classmethod
171
def scale_value(cls, value, range):
172
# use float values instead of integers because we don't need an encode
173
# map index
174
scaled = cls.float_scale_value(value, range)
175
clipped = cls.clip_value(scaled)
176
Data.check_clip(scaled, clipped)
177
return clipped
178
179
180
class ExtendedData(Data):
181
182
max_value = 4095
183
enc_map = \
184
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-.'
185
186
def __repr__(self):
187
encoded_data = []
188
enc_size = len(ExtendedData.enc_map)
189
for data in self.data:
190
sub_data = []
191
for value in data:
192
if value is None:
193
sub_data.append('__')
194
elif value >= 0 and value <= self.max_value:
195
first, second = divmod(int(value), enc_size)
196
sub_data.append('%s%s' % (
197
ExtendedData.enc_map[first],
198
ExtendedData.enc_map[second]))
199
else:
200
raise DataOutOfRangeException( \
201
'Item #%i "%s" is out of range' % (data.index(value), \
202
value))
203
encoded_data.append(''.join(sub_data))
204
return 'chd=e:' + ','.join(encoded_data)
205
206
207
# Axis Classes
208
# -----------------------------------------------------------------------------
209
210
211
class Axis(object):
212
213
BOTTOM = 'x'
214
TOP = 't'
215
LEFT = 'y'
216
RIGHT = 'r'
217
TYPES = (BOTTOM, TOP, LEFT, RIGHT)
218
219
def __init__(self, axis_index, axis_type, **kw):
220
assert(axis_type in Axis.TYPES)
221
self.has_style = False
222
self.axis_index = axis_index
223
self.axis_type = axis_type
224
self.positions = None
225
226
def set_index(self, axis_index):
227
self.axis_index = axis_index
228
229
def set_positions(self, positions):
230
self.positions = positions
231
232
def set_style(self, colour, font_size=None, alignment=None):
233
_check_colour(colour)
234
self.colour = colour
235
self.font_size = font_size
236
self.alignment = alignment
237
self.has_style = True
238
239
def style_to_url(self):
240
bits = []
241
bits.append(str(self.axis_index))
242
bits.append(self.colour)
243
if self.font_size is not None:
244
bits.append(str(self.font_size))
245
if self.alignment is not None:
246
bits.append(str(self.alignment))
247
return ','.join(bits)
248
249
def positions_to_url(self):
250
bits = []
251
bits.append(str(self.axis_index))
252
bits += [str(a) for a in self.positions]
253
return ','.join(bits)
254
255
256
class LabelAxis(Axis):
257
258
def __init__(self, axis_index, axis_type, values, **kwargs):
259
Axis.__init__(self, axis_index, axis_type, **kwargs)
260
self.values = [str(a) for a in values]
261
262
def __repr__(self):
263
return '%i:%%7c%s' % (self.axis_index, '%7c'.join(self.values))
264
265
266
class RangeAxis(Axis):
267
268
def __init__(self, axis_index, axis_type, low, high, **kwargs):
269
Axis.__init__(self, axis_index, axis_type, **kwargs)
270
self.low = low
271
self.high = high
272
273
def __repr__(self):
274
return '%i,%s,%s' % (self.axis_index, self.low, self.high)
275
276
# Chart Classes
277
# -----------------------------------------------------------------------------
278
279
280
class Chart(object):
281
"""Abstract class for all chart types.
282
283
width are height specify the dimensions of the image. title sets the title
284
of the chart. legend requires a list that corresponds to datasets.
285
"""
286
287
BASE_URL = 'http://chart.apis.google.com/chart?'
288
BACKGROUND = 'bg'
289
CHART = 'c'
290
ALPHA = 'a'
291
VALID_SOLID_FILL_TYPES = (BACKGROUND, CHART, ALPHA)
292
SOLID = 's'
293
LINEAR_GRADIENT = 'lg'
294
LINEAR_STRIPES = 'ls'
295
296
def __init__(self, width, height, title=None, legend=None, colours=None,
297
auto_scale=True, x_range=None, y_range=None,
298
colours_within_series=None):
299
if type(self) == Chart:
300
raise AbstractClassException('This is an abstract class')
301
assert(isinstance(width, int))
302
assert(isinstance(height, int))
303
self.width = width
304
self.height = height
305
self.data = []
306
self.set_title(title)
307
self.set_title_style(None, None)
308
self.set_legend(legend)
309
self.set_legend_position(None)
310
self.set_colours(colours)
311
self.set_colours_within_series(colours_within_series)
312
313
# Data for scaling.
314
self.auto_scale = auto_scale # Whether to automatically scale data
315
self.x_range = x_range # (min, max) x-axis range for scaling
316
self.y_range = y_range # (min, max) y-axis range for scaling
317
self.scaled_data_class = None
318
self.scaled_x_range = None
319
self.scaled_y_range = None
320
321
self.fill_types = {
322
Chart.BACKGROUND: None,
323
Chart.CHART: None,
324
Chart.ALPHA: None,
325
}
326
self.fill_area = {
327
Chart.BACKGROUND: None,
328
Chart.CHART: None,
329
Chart.ALPHA: None,
330
}
331
self.axis = []
332
self.markers = []
333
self.line_styles = {}
334
self.grid = None
335
self.title_colour = None
336
self.title_font_size = None
337
338
# URL generation
339
# -------------------------------------------------------------------------
340
341
def get_url(self, data_class=None):
342
url_bits = self.get_url_bits(data_class=data_class)
343
return self.BASE_URL + '&'.join(url_bits)
344
345
def get_url_bits(self, data_class=None):
346
url_bits = []
347
# required arguments
348
url_bits.append(self.type_to_url())
349
url_bits.append('chs=%ix%i' % (self.width, self.height))
350
url_bits.append(self.data_to_url(data_class=data_class))
351
# optional arguments
352
if self.title:
353
url_bits.append('chtt=%s' % self.title)
354
if self.title_colour and self.title_font_size:
355
url_bits.append('chts=%s,%s' % (self.title_colour, \
356
self.title_font_size))
357
if self.legend:
358
url_bits.append('chdl=%s' % '%7c'.join(self.legend))
359
if self.legend_position:
360
url_bits.append('chdlp=%s' % (self.legend_position))
361
if self.colours:
362
url_bits.append('chco=%s' % ','.join(self.colours))
363
if self.colours_within_series:
364
url_bits.append('chco=%s' % '%7c'.join(self.colours_within_series))
365
ret = self.fill_to_url()
366
if ret:
367
url_bits.append(ret)
368
ret = self.axis_to_url()
369
if ret:
370
url_bits.append(ret)
371
if self.markers:
372
url_bits.append(self.markers_to_url())
373
if self.line_styles:
374
style = []
375
for index in xrange(max(self.line_styles) + 1):
376
if index in self.line_styles:
377
values = self.line_styles[index]
378
else:
379
values = ('1', )
380
style.append(','.join(values))
381
url_bits.append('chls=%s' % '%7c'.join(style))
382
if self.grid:
383
url_bits.append('chg=%s' % self.grid)
384
return url_bits
385
386
# Downloading
387
# -------------------------------------------------------------------------
388
389
def download(self, file_name):
390
opener = urllib2.urlopen(self.get_url())
391
392
if opener.headers['content-type'] != 'image/png':
393
raise BadContentTypeException('Server responded with a ' \
394
'content-type of %s' % opener.headers['content-type'])
395
396
open(file_name, 'wb').write(opener.read())
397
398
# Simple settings
399
# -------------------------------------------------------------------------
400
401
def set_title(self, title):
402
if title:
403
self.title = urllib.quote(title)
404
else:
405
self.title = None
406
407
def set_title_style(self, colour=None, font_size=None):
408
if not colour is None:
409
_check_colour(colour)
410
if not colour and not font_size:
411
return
412
self.title_colour = colour or '333333'
413
self.title_font_size = font_size or 13.5
414
415
def set_legend(self, legend):
416
"""legend needs to be a list, tuple or None"""
417
assert(isinstance(legend, list) or isinstance(legend, tuple) or
418
legend is None)
419
if legend:
420
self.legend = [urllib.quote(a) for a in legend]
421
else:
422
self.legend = None
423
424
def set_legend_position(self, legend_position):
425
if legend_position:
426
self.legend_position = urllib.quote(legend_position)
427
else:
428
self.legend_position = None
429
430
# Chart colours
431
# -------------------------------------------------------------------------
432
433
def set_colours(self, colours):
434
# colours needs to be a list, tuple or None
435
assert(isinstance(colours, list) or isinstance(colours, tuple) or
436
colours is None)
437
# make sure the colours are in the right format
438
if colours:
439
for col in colours:
440
_check_colour(col)
441
self.colours = colours
442
443
def set_colours_within_series(self, colours):
444
# colours needs to be a list, tuple or None
445
assert(isinstance(colours, list) or isinstance(colours, tuple) or
446
colours is None)
447
# make sure the colours are in the right format
448
if colours:
449
for col in colours:
450
_check_colour(col)
451
self.colours_within_series = colours
452
453
# Background/Chart colours
454
# -------------------------------------------------------------------------
455
456
def fill_solid(self, area, colour):
457
assert(area in Chart.VALID_SOLID_FILL_TYPES)
458
_check_colour(colour)
459
self.fill_area[area] = colour
460
self.fill_types[area] = Chart.SOLID
461
462
def _check_fill_linear(self, angle, *args):
463
assert(isinstance(args, list) or isinstance(args, tuple))
464
assert(angle >= 0 and angle <= 90)
465
assert(len(args) % 2 == 0)
466
args = list(args) # args is probably a tuple and we need to mutate
467
for a in xrange(int(len(args) / 2)):
468
col = args[a * 2]
469
offset = args[a * 2 + 1]
470
_check_colour(col)
471
assert(offset >= 0 and offset <= 1)
472
args[a * 2 + 1] = str(args[a * 2 + 1])
473
return args
474
475
def fill_linear_gradient(self, area, angle, *args):
476
assert(area in Chart.VALID_SOLID_FILL_TYPES)
477
args = self._check_fill_linear(angle, *args)
478
self.fill_types[area] = Chart.LINEAR_GRADIENT
479
self.fill_area[area] = ','.join([str(angle)] + args)
480
481
def fill_linear_stripes(self, area, angle, *args):
482
assert(area in Chart.VALID_SOLID_FILL_TYPES)
483
args = self._check_fill_linear(angle, *args)
484
self.fill_types[area] = Chart.LINEAR_STRIPES
485
self.fill_area[area] = ','.join([str(angle)] + args)
486
487
def fill_to_url(self):
488
areas = []
489
for area in (Chart.BACKGROUND, Chart.CHART, Chart.ALPHA):
490
if self.fill_types[area]:
491
areas.append('%s,%s,%s' % (area, self.fill_types[area], \
492
self.fill_area[area]))
493
if areas:
494
return 'chf=' + '%7c'.join(areas)
495
496
# Data
497
# -------------------------------------------------------------------------
498
499
def data_class_detection(self, data):
500
"""Determines the appropriate data encoding type to give satisfactory
501
resolution (http://code.google.com/apis/chart/#chart_data).
502
"""
503
assert(isinstance(data, list) or isinstance(data, tuple))
504
if not isinstance(self, (LineChart, BarChart, ScatterChart)):
505
# From the link above:
506
# Simple encoding is suitable for all other types of chart
507
# regardless of size.
508
return SimpleData
509
elif self.height < 100:
510
# The link above indicates that line and bar charts less
511
# than 300px in size can be suitably represented with the
512
# simple encoding. I've found that this isn't sufficient,
513
# e.g. examples/line-xy-circle.png. Let's try 100px.
514
return SimpleData
515
else:
516
return ExtendedData
517
518
def _filter_none(self, data):
519
return [r for r in data if r is not None]
520
521
def data_x_range(self):
522
"""Return a 2-tuple giving the minimum and maximum x-axis
523
data range.
524
"""
525
try:
526
lower = min([min(self._filter_none(s))
527
for type, s in self.annotated_data()
528
if type == 'x'])
529
upper = max([max(self._filter_none(s))
530
for type, s in self.annotated_data()
531
if type == 'x'])
532
return (lower, upper)
533
except ValueError:
534
return None # no x-axis datasets
535
536
def data_y_range(self):
537
"""Return a 2-tuple giving the minimum and maximum y-axis
538
data range.
539
"""
540
try:
541
lower = min([min(self._filter_none(s))
542
for type, s in self.annotated_data()
543
if type == 'y'])
544
upper = max([max(self._filter_none(s)) + 1
545
for type, s in self.annotated_data()
546
if type == 'y'])
547
return (lower, upper)
548
except ValueError:
549
return None # no y-axis datasets
550
551
def scaled_data(self, data_class, x_range=None, y_range=None):
552
"""Scale `self.data` as appropriate for the given data encoding
553
(data_class) and return it.
554
555
An optional `y_range` -- a 2-tuple (lower, upper) -- can be
556
given to specify the y-axis bounds. If not given, the range is
557
inferred from the data: (0, <max-value>) presuming no negative
558
values, or (<min-value>, <max-value>) if there are negative
559
values. `self.scaled_y_range` is set to the actual lower and
560
upper scaling range.
561
562
Ditto for `x_range`. Note that some chart types don't have x-axis
563
data.
564
"""
565
self.scaled_data_class = data_class
566
567
# Determine the x-axis range for scaling.
568
if x_range is None:
569
x_range = self.data_x_range()
570
if x_range and x_range[0] > 0:
571
x_range = (x_range[0], x_range[1])
572
self.scaled_x_range = x_range
573
574
# Determine the y-axis range for scaling.
575
if y_range is None:
576
y_range = self.data_y_range()
577
if y_range and y_range[0] > 0:
578
y_range = (y_range[0], y_range[1])
579
self.scaled_y_range = y_range
580
581
scaled_data = []
582
for type, dataset in self.annotated_data():
583
if type == 'x':
584
scale_range = x_range
585
elif type == 'y':
586
scale_range = y_range
587
elif type == 'marker-size':
588
scale_range = (0, max(dataset))
589
scaled_dataset = []
590
for v in dataset:
591
if v is None:
592
scaled_dataset.append(None)
593
else:
594
scaled_dataset.append(
595
data_class.scale_value(v, scale_range))
596
scaled_data.append(scaled_dataset)
597
return scaled_data
598
599
def add_data(self, data):
600
self.data.append(data)
601
return len(self.data) - 1 # return the "index" of the data set
602
603
def data_to_url(self, data_class=None):
604
if not data_class:
605
data_class = self.data_class_detection(self.data)
606
if not issubclass(data_class, Data):
607
raise UnknownDataTypeException()
608
if self.auto_scale:
609
data = self.scaled_data(data_class, self.x_range, self.y_range)
610
else:
611
data = self.data
612
return repr(data_class(data))
613
614
def annotated_data(self):
615
for dataset in self.data:
616
yield ('x', dataset)
617
618
# Axis Labels
619
# -------------------------------------------------------------------------
620
621
def set_axis_labels(self, axis_type, values):
622
assert(axis_type in Axis.TYPES)
623
values = [urllib.quote(str(a)) for a in values]
624
axis_index = len(self.axis)
625
axis = LabelAxis(axis_index, axis_type, values)
626
self.axis.append(axis)
627
return axis_index
628
629
def set_axis_range(self, axis_type, low, high):
630
assert(axis_type in Axis.TYPES)
631
axis_index = len(self.axis)
632
axis = RangeAxis(axis_index, axis_type, low, high)
633
self.axis.append(axis)
634
return axis_index
635
636
def set_axis_positions(self, axis_index, positions):
637
try:
638
self.axis[axis_index].set_positions(positions)
639
except IndexError:
640
raise InvalidParametersException('Axis index %i has not been ' \
641
'created' % axis)
642
643
def set_axis_style(self, axis_index, colour, font_size=None, \
644
alignment=None):
645
try:
646
self.axis[axis_index].set_style(colour, font_size, alignment)
647
except IndexError:
648
raise InvalidParametersException('Axis index %i has not been ' \
649
'created' % axis)
650
651
def axis_to_url(self):
652
available_axis = []
653
label_axis = []
654
range_axis = []
655
positions = []
656
styles = []
657
index = -1
658
for axis in self.axis:
659
available_axis.append(axis.axis_type)
660
if isinstance(axis, RangeAxis):
661
range_axis.append(repr(axis))
662
if isinstance(axis, LabelAxis):
663
label_axis.append(repr(axis))
664
if axis.positions:
665
positions.append(axis.positions_to_url())
666
if axis.has_style:
667
styles.append(axis.style_to_url())
668
if not available_axis:
669
return
670
url_bits = []
671
url_bits.append('chxt=%s' % ','.join(available_axis))
672
if label_axis:
673
url_bits.append('chxl=%s' % '%7c'.join(label_axis))
674
if range_axis:
675
url_bits.append('chxr=%s' % '%7c'.join(range_axis))
676
if positions:
677
url_bits.append('chxp=%s' % '%7c'.join(positions))
678
if styles:
679
url_bits.append('chxs=%s' % '%7c'.join(styles))
680
return '&'.join(url_bits)
681
682
# Markers, Ranges and Fill area (chm)
683
# -------------------------------------------------------------------------
684
685
def markers_to_url(self):
686
return 'chm=%s' % '%7c'.join([','.join(a) for a in self.markers])
687
688
def add_marker(self, index, point, marker_type, colour, size, priority=0):
689
self.markers.append((marker_type, colour, str(index), str(point), \
690
str(size), str(priority)))
691
692
def add_horizontal_range(self, colour, start, stop):
693
self.markers.append(('r', colour, '0', str(start), str(stop)))
694
695
def add_data_line(self, colour, data_set, size, priority=0):
696
self.markers.append(('D', colour, str(data_set), '0', str(size), \
697
str(priority)))
698
699
def add_marker_text(self, string, colour, data_set, data_point, size, \
700
priority=0):
701
self.markers.append((str(string), colour, str(data_set), \
702
str(data_point), str(size), str(priority)))
703
704
def add_vertical_range(self, colour, start, stop):
705
self.markers.append(('R', colour, '0', str(start), str(stop)))
706
707
def add_fill_range(self, colour, index_start, index_end):
708
self.markers.append(('b', colour, str(index_start), str(index_end), \
709
'1'))
710
711
def add_fill_simple(self, colour):
712
self.markers.append(('B', colour, '1', '1', '1'))
713
714
# Line styles
715
# -------------------------------------------------------------------------
716
717
def set_line_style(self, index, thickness=1, line_segment=None, \
718
blank_segment=None):
719
value = []
720
value.append(str(thickness))
721
if line_segment:
722
value.append(str(line_segment))
723
value.append(str(blank_segment))
724
self.line_styles[index] = value
725
726
# Grid
727
# -------------------------------------------------------------------------
728
729
def set_grid(self, x_step, y_step, line_segment=1, \
730
blank_segment=0):
731
self.grid = '%s,%s,%s,%s' % (x_step, y_step, line_segment, \
732
blank_segment)
733
734
735
class ScatterChart(Chart):
736
737
def type_to_url(self):
738
return 'cht=s'
739
740
def annotated_data(self):
741
yield ('x', self.data[0])
742
yield ('y', self.data[1])
743
if len(self.data) > 2:
744
# The optional third dataset is relative sizing for point
745
# markers.
746
yield ('marker-size', self.data[2])
747
748
749
class LineChart(Chart):
750
751
def __init__(self, *args, **kwargs):
752
if type(self) == LineChart:
753
raise AbstractClassException('This is an abstract class')
754
Chart.__init__(self, *args, **kwargs)
755
756
757
class SimpleLineChart(LineChart):
758
759
def type_to_url(self):
760
return 'cht=lc'
761
762
def annotated_data(self):
763
# All datasets are y-axis data.
764
for dataset in self.data:
765
yield ('y', dataset)
766
767
768
class SparkLineChart(SimpleLineChart):
769
770
def type_to_url(self):
771
return 'cht=ls'
772
773
774
class XYLineChart(LineChart):
775
776
def type_to_url(self):
777
return 'cht=lxy'
778
779
def annotated_data(self):
780
# Datasets alternate between x-axis, y-axis.
781
for i, dataset in enumerate(self.data):
782
if i % 2 == 0:
783
yield ('x', dataset)
784
else:
785
yield ('y', dataset)
786
787
788
class BarChart(Chart):
789
790
def __init__(self, *args, **kwargs):
791
if type(self) == BarChart:
792
raise AbstractClassException('This is an abstract class')
793
Chart.__init__(self, *args, **kwargs)
794
self.bar_width = None
795
self.zero_lines = {}
796
797
def set_bar_width(self, bar_width):
798
self.bar_width = bar_width
799
800
def set_zero_line(self, index, zero_line):
801
self.zero_lines[index] = zero_line
802
803
def get_url_bits(self, data_class=None, skip_chbh=False):
804
url_bits = Chart.get_url_bits(self, data_class=data_class)
805
if not skip_chbh and self.bar_width is not None:
806
url_bits.append('chbh=%i' % self.bar_width)
807
zero_line = []
808
if self.zero_lines:
809
for index in xrange(max(self.zero_lines) + 1):
810
if index in self.zero_lines:
811
zero_line.append(str(self.zero_lines[index]))
812
else:
813
zero_line.append('0')
814
url_bits.append('chp=%s' % ','.join(zero_line))
815
return url_bits
816
817
818
class StackedHorizontalBarChart(BarChart):
819
820
def type_to_url(self):
821
return 'cht=bhs'
822
823
824
class StackedVerticalBarChart(BarChart):
825
826
def type_to_url(self):
827
return 'cht=bvs'
828
829
def annotated_data(self):
830
for dataset in self.data:
831
yield ('y', dataset)
832
833
834
class GroupedBarChart(BarChart):
835
836
def __init__(self, *args, **kwargs):
837
if type(self) == GroupedBarChart:
838
raise AbstractClassException('This is an abstract class')
839
BarChart.__init__(self, *args, **kwargs)
840
self.bar_spacing = None
841
self.group_spacing = None
842
843
def set_bar_spacing(self, spacing):
844
"""Set spacing between bars in a group."""
845
self.bar_spacing = spacing
846
847
def set_group_spacing(self, spacing):
848
"""Set spacing between groups of bars."""
849
self.group_spacing = spacing
850
851
def get_url_bits(self, data_class=None):
852
# Skip 'BarChart.get_url_bits' and call Chart directly so the parent
853
# doesn't add "chbh" before we do.
854
url_bits = BarChart.get_url_bits(self, data_class=data_class,
855
skip_chbh=True)
856
if self.group_spacing is not None:
857
if self.bar_spacing is None:
858
raise InvalidParametersException('Bar spacing is required ' \
859
'to be set when setting group spacing')
860
if self.bar_width is None:
861
raise InvalidParametersException('Bar width is required to ' \
862
'be set when setting bar spacing')
863
url_bits.append('chbh=%i,%i,%i'
864
% (self.bar_width, self.bar_spacing, self.group_spacing))
865
elif self.bar_spacing is not None:
866
if self.bar_width is None:
867
raise InvalidParametersException('Bar width is required to ' \
868
'be set when setting bar spacing')
869
url_bits.append('chbh=%i,%i' % (self.bar_width, self.bar_spacing))
870
elif self.bar_width:
871
url_bits.append('chbh=%i' % self.bar_width)
872
return url_bits
873
874
875
class GroupedHorizontalBarChart(GroupedBarChart):
876
877
def type_to_url(self):
878
return 'cht=bhg'
879
880
881
class GroupedVerticalBarChart(GroupedBarChart):
882
883
def type_to_url(self):
884
return 'cht=bvg'
885
886
def annotated_data(self):
887
for dataset in self.data:
888
yield ('y', dataset)
889
890
891
class PieChart(Chart):
892
893
def __init__(self, *args, **kwargs):
894
if type(self) == PieChart:
895
raise AbstractClassException('This is an abstract class')
896
Chart.__init__(self, *args, **kwargs)
897
self.pie_labels = []
898
if self.y_range:
899
warnings.warn('y_range is not used with %s.' % \
900
(self.__class__.__name__))
901
902
def set_pie_labels(self, labels):
903
self.pie_labels = [urllib.quote(a) for a in labels]
904
905
def get_url_bits(self, data_class=None):
906
url_bits = Chart.get_url_bits(self, data_class=data_class)
907
if self.pie_labels:
908
url_bits.append('chl=%s' % '%7c'.join(self.pie_labels))
909
return url_bits
910
911
def annotated_data(self):
912
# Datasets are all y-axis data. However, there should only be
913
# one dataset for pie charts.
914
for dataset in self.data:
915
yield ('x', dataset)
916
917
def scaled_data(self, data_class, x_range=None, y_range=None):
918
if not x_range:
919
x_range = [0, sum(self.data[0])]
920
return Chart.scaled_data(self, data_class, x_range, self.y_range)
921
922
923
class PieChart2D(PieChart):
924
925
def type_to_url(self):
926
return 'cht=p'
927
928
929
class PieChart3D(PieChart):
930
931
def type_to_url(self):
932
return 'cht=p3'
933
934
935
class VennChart(Chart):
936
937
def type_to_url(self):
938
return 'cht=v'
939
940
def annotated_data(self):
941
for dataset in self.data:
942
yield ('y', dataset)
943
944
945
class RadarChart(Chart):
946
947
def type_to_url(self):
948
return 'cht=r'
949
950
951
class SplineRadarChart(RadarChart):
952
953
def type_to_url(self):
954
return 'cht=rs'
955
956
957
class MapChart(Chart):
958
959
def __init__(self, *args, **kwargs):
960
Chart.__init__(self, *args, **kwargs)
961
self.geo_area = 'world'
962
self.codes = []
963
self.__areas = ('africa', 'asia', 'europe', 'middle_east',
964
'south_america', 'usa', 'world')
965
self.__ccodes = (
966
'AD', 'AE', 'AF', 'AG', 'AI', 'AL', 'AM', 'AN', 'AO', 'AQ', 'AR',
967
'AS', 'AT', 'AU', 'AW', 'AX', 'AZ', 'BA', 'BB', 'BD', 'BE', 'BF',
968
'BG', 'BH', 'BI', 'BJ', 'BL', 'BM', 'BN', 'BO', 'BR', 'BS', 'BT',
969
'BV', 'BW', 'BY', 'BZ', 'CA', 'CC', 'CD', 'CF', 'CG', 'CH', 'CI',
970
'CK', 'CL', 'CM', 'CN', 'CO', 'CR', 'CU', 'CV', 'CX', 'CY', 'CZ',
971
'DE', 'DJ', 'DK', 'DM', 'DO', 'DZ', 'EC', 'EE', 'EG', 'EH', 'ER',
972
'ES', 'ET', 'FI', 'FJ', 'FK', 'FM', 'FO', 'FR', 'GA', 'GB', 'GD',
973
'GE', 'GF', 'GG', 'GH', 'GI', 'GL', 'GM', 'GN', 'GP', 'GQ', 'GR',
974
'GS', 'GT', 'GU', 'GW', 'GY', 'HK', 'HM', 'HN', 'HR', 'HT', 'HU',
975
'ID', 'IE', 'IL', 'IM', 'IN', 'IO', 'IQ', 'IR', 'IS', 'IT', 'JE',
976
'JM', 'JO', 'JP', 'KE', 'KG', 'KH', 'KI', 'KM', 'KN', 'KP', 'KR',
977
'KW', 'KY', 'KZ', 'LA', 'LB', 'LC', 'LI', 'LK', 'LR', 'LS', 'LT',
978
'LU', 'LV', 'LY', 'MA', 'MC', 'MD', 'ME', 'MF', 'MG', 'MH', 'MK',
979
'ML', 'MM', 'MN', 'MO', 'MP', 'MQ', 'MR', 'MS', 'MT', 'MU', 'MV',
980
'MW', 'MX', 'MY', 'MZ', 'NA', 'NC', 'NE', 'NF', 'NG', 'NI', 'NL',
981
'NO', 'NP', 'NR', 'NU', 'NZ', 'OM', 'PA', 'PE', 'PF', 'PG', 'PH',
982
'PK', 'PL', 'PM', 'PN', 'PR', 'PS', 'PT', 'PW', 'PY', 'QA', 'RE',
983
'RO', 'RS', 'RU', 'RW', 'SA', 'SB', 'SC', 'SD', 'SE', 'SG', 'SH',
984
'SI', 'SJ', 'SK', 'SL', 'SM', 'SN', 'SO', 'SR', 'ST', 'SV', 'SY',
985
'SZ', 'TC', 'TD', 'TF', 'TG', 'TH', 'TJ', 'TK', 'TL', 'TM', 'TN',
986
'TO', 'TR', 'TT', 'TV', 'TW', 'TZ', 'UA', 'UG', 'UM', 'US', 'UY',
987
'UZ', 'VA', 'VC', 'VE', 'VG', 'VI', 'VN', 'VU', 'WF', 'WS', 'YE',
988
'YT', 'ZA', 'ZM', 'ZW')
989
990
def type_to_url(self):
991
return 'cht=t'
992
993
def set_codes(self, codes):
994
'''Set the country code map for the data.
995
Codes given in a list.
996
997
i.e. DE - Germany
998
AT - Austria
999
US - United States
1000
'''
1001
1002
codemap = ''
1003
1004
for cc in codes:
1005
cc = cc.upper()
1006
if cc in self.__ccodes:
1007
codemap += cc
1008
else:
1009
raise UnknownCountryCodeException(cc)
1010
1011
self.codes = codemap
1012
1013
def set_geo_area(self, area):
1014
'''Sets the geo area for the map.
1015
1016
* africa
1017
* asia
1018
* europe
1019
* middle_east
1020
* south_america
1021
* usa
1022
* world
1023
'''
1024
1025
if area in self.__areas:
1026
self.geo_area = area
1027
else:
1028
raise UnknownChartType('Unknown chart type for maps: %s' %area)
1029
1030
def get_url_bits(self, data_class=None):
1031
url_bits = Chart.get_url_bits(self, data_class=data_class)
1032
url_bits.append('chtm=%s' % self.geo_area)
1033
if self.codes:
1034
url_bits.append('chld=%s' % ''.join(self.codes))
1035
return url_bits
1036
1037
def add_data_dict(self, datadict):
1038
'''Sets the data and country codes via a dictionary.
1039
1040
i.e. {'DE': 50, 'GB': 30, 'AT': 70}
1041
'''
1042
1043
self.set_codes(datadict.keys())
1044
self.add_data(datadict.values())
1045
1046
1047
class GoogleOMeterChart(PieChart):
1048
"""Inheriting from PieChart because of similar labeling"""
1049
1050
def __init__(self, *args, **kwargs):
1051
PieChart.__init__(self, *args, **kwargs)
1052
if self.auto_scale and not self.x_range:
1053
warnings.warn('Please specify an x_range with GoogleOMeterChart, '
1054
'otherwise one arrow will always be at the max.')
1055
1056
def type_to_url(self):
1057
return 'cht=gom'
1058
1059
1060
class QRChart(Chart):
1061
1062
def __init__(self, *args, **kwargs):
1063
Chart.__init__(self, *args, **kwargs)
1064
self.encoding = None
1065
self.ec_level = None
1066
self.margin = None
1067
1068
def type_to_url(self):
1069
return 'cht=qr'
1070
1071
def data_to_url(self, data_class=None):
1072
if not self.data:
1073
raise NoDataGivenException()
1074
return 'chl=%s' % urllib.quote(self.data[0])
1075
1076
def get_url_bits(self, data_class=None):
1077
url_bits = Chart.get_url_bits(self, data_class=data_class)
1078
if self.encoding:
1079
url_bits.append('choe=%s' % self.encoding)
1080
if self.ec_level:
1081
url_bits.append('chld=%s%%7c%s' % (self.ec_level, self.margin))
1082
return url_bits
1083
1084
def set_encoding(self, encoding):
1085
self.encoding = encoding
1086
1087
def set_ec(self, level, margin):
1088
self.ec_level = level
1089
self.margin = margin
1090
1091
1092
class ChartGrammar(object):
1093
1094
def __init__(self):
1095
self.grammar = None
1096
self.chart = None
1097
1098
def parse(self, grammar):
1099
self.grammar = grammar
1100
self.chart = self.create_chart_instance()
1101
1102
for attr in self.grammar:
1103
if attr in ('w', 'h', 'type', 'auto_scale', 'x_range', 'y_range'):
1104
continue # These are already parsed in create_chart_instance
1105
attr_func = 'parse_' + attr
1106
if not hasattr(self, attr_func):
1107
warnings.warn('No parser for grammar attribute "%s"' % (attr))
1108
continue
1109
getattr(self, attr_func)(grammar[attr])
1110
1111
return self.chart
1112
1113
def parse_data(self, data):
1114
self.chart.data = data
1115
1116
@staticmethod
1117
def get_possible_chart_types():
1118
possible_charts = []
1119
for cls_name in globals().keys():
1120
if not cls_name.endswith('Chart'):
1121
continue
1122
cls = globals()[cls_name]
1123
# Check if it is an abstract class
1124
try:
1125
a = cls(1, 1, auto_scale=False)
1126
del a
1127
except AbstractClassException:
1128
continue
1129
# Strip off "Class"
1130
possible_charts.append(cls_name[:-5])
1131
return possible_charts
1132
1133
def create_chart_instance(self, grammar=None):
1134
if not grammar:
1135
grammar = self.grammar
1136
assert(isinstance(grammar, dict)) # grammar must be a dict
1137
assert('w' in grammar) # width is required
1138
assert('h' in grammar) # height is required
1139
assert('type' in grammar) # type is required
1140
chart_type = grammar['type']
1141
w = grammar['w']
1142
h = grammar['h']
1143
auto_scale = grammar.get('auto_scale', None)
1144
x_range = grammar.get('x_range', None)
1145
y_range = grammar.get('y_range', None)
1146
types = ChartGrammar.get_possible_chart_types()
1147
if chart_type not in types:
1148
raise UnknownChartType('%s is an unknown chart type. Possible '
1149
'chart types are %s' % (chart_type, ','.join(types)))
1150
return globals()[chart_type + 'Chart'](w, h, auto_scale=auto_scale,
1151
x_range=x_range, y_range=y_range)
1152
1153
def download(self):
1154
pass
1155
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0