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- Committer: gak
- Date: 2009-03-15 07:51:08 UTC
- Revision ID: git-v1:5cf090282c7aebd29821453475ef2a874b68b70b
- #23 MapChart extensions (thanks to Andreas Schawo)
- files added:
- examples/all.py
- examples/helpers
- scripts
- test
- files modified:
- examples/helper.py
added
removed
pygooglechart.py
1
"""
2
PyGoogleChart - A complete Python wrapper for the Google Chart API
3
4
http://pygooglechart.slowchop.com/
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6
Copyright 2007 Gerald Kaszuba
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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
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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,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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18
You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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21
"""
22
23
import os
24
import urllib
25
import urllib2
26
import math
27
import random
28
import re
29
30
# Helper variables and functions
31
# -----------------------------------------------------------------------------
32
33
__version__ = '0.1.2'
34
35
reo_colour = re.compile('^([A-Fa-f0-9]{2,2}){3,4}$')
36
37
38
def _check_colour(colour):
39
if not reo_colour.match(colour):
40
raise InvalidParametersException('Colours need to be in ' \
41
'RRGGBB or RRGGBBAA format. One of your colours has %s' % \
42
colour)
43
44
# Exception Classes
45
# -----------------------------------------------------------------------------
46
47
48
class PyGoogleChartException(Exception):
49
pass
50
51
52
class DataOutOfRangeException(PyGoogleChartException):
53
pass
54
55
56
class UnknownDataTypeException(PyGoogleChartException):
57
pass
58
59
60
class NoDataGivenException(PyGoogleChartException):
61
pass
62
63
64
class InvalidParametersException(PyGoogleChartException):
65
pass
66
67
68
class BadContentTypeException(PyGoogleChartException):
69
pass
70
71
72
# Data Classes
73
# -----------------------------------------------------------------------------
74
75
76
class Data(object):
77
78
def __init__(self, data):
79
assert(type(self) != Data) # This is an abstract class
80
self.data = data
81
82
83
class SimpleData(Data):
84
enc_map = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
85
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('_')
93
elif value >= 0 and value <= SimpleData.max_value:
94
sub_data.append(SimpleData.enc_map[value])
95
else:
96
raise DataOutOfRangeException()
97
encoded_data.append(''.join(sub_data))
98
return 'chd=s:' + ','.join(encoded_data)
99
100
@staticmethod
101
def max_value():
102
return 61
103
104
105
class TextData(Data):
106
107
def __repr__(self):
108
encoded_data = []
109
for data in self.data:
110
sub_data = []
111
for value in data:
112
if value is None:
113
sub_data.append(-1)
114
elif value >= 0 and value <= TextData.max_value:
115
sub_data.append(str(float(value)))
116
else:
117
raise DataOutOfRangeException()
118
encoded_data.append(','.join(sub_data))
119
return 'chd=t:' + '|'.join(encoded_data)
120
121
@staticmethod
122
def max_value():
123
return 100
124
125
126
class ExtendedData(Data):
127
enc_map = \
128
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-.'
129
130
def __repr__(self):
131
encoded_data = []
132
enc_size = len(ExtendedData.enc_map)
133
for data in self.data:
134
sub_data = []
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for value in data:
136
if value is None:
137
sub_data.append('__')
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elif value >= 0 and value <= ExtendedData.max_value:
139
first, second = divmod(int(value), enc_size)
140
sub_data.append('%s%s' % (
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ExtendedData.enc_map[first],
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ExtendedData.enc_map[second]))
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else:
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raise DataOutOfRangeException( \
145
'Item #%i "%s" is out of range' % (data.index(value), \
146
value))
147
encoded_data.append(''.join(sub_data))
148
return 'chd=e:' + ','.join(encoded_data)
149
150
@staticmethod
151
def max_value():
152
return 4095
153
154
# Axis Classes
155
# -----------------------------------------------------------------------------
156
157
158
class Axis(object):
159
BOTTOM = 'x'
160
TOP = 't'
161
LEFT = 'y'
162
RIGHT = 'r'
163
TYPES = (BOTTOM, TOP, LEFT, RIGHT)
164
165
def __init__(self, axis_index, axis_type, **kw):
166
assert(axis_type in Axis.TYPES)
167
self.has_style = False
168
self.axis_index = axis_index
169
self.axis_type = axis_type
170
self.positions = None
171
172
def set_index(self, axis_index):
173
self.axis_index = axis_index
174
175
def set_positions(self, positions):
176
self.positions = positions
177
178
def set_style(self, colour, font_size=None, alignment=None):
179
_check_colour(colour)
180
self.colour = colour
181
self.font_size = font_size
182
self.alignment = alignment
183
self.has_style = True
184
185
def style_to_url(self):
186
bits = []
187
bits.append(str(self.axis_index))
188
bits.append(self.colour)
189
if self.font_size is not None:
190
bits.append(str(self.font_size))
191
if self.alignment is not None:
192
bits.append(str(self.alignment))
193
return ','.join(bits)
194
195
def positions_to_url(self):
196
bits = []
197
bits.append(str(self.axis_index))
198
bits += [str(a) for a in self.positions]
199
return ','.join(bits)
200
201
202
class LabelAxis(Axis):
203
204
def __init__(self, axis_index, axis_type, values, **kwargs):
205
Axis.__init__(self, axis_index, axis_type, **kwargs)
206
self.values = [str(a) for a in values]
207
208
def __repr__(self):
209
return '%i:|%s' % (self.axis_index, '|'.join(self.values))
210
211
212
class RangeAxis(Axis):
213
214
def __init__(self, axis_index, axis_type, low, high, **kwargs):
215
Axis.__init__(self, axis_index, axis_type, **kwargs)
216
self.low = low
217
self.high = high
218
219
def __repr__(self):
220
return '%i,%s,%s' % (self.axis_index, self.low, self.high)
221
222
# Chart Classes
223
# -----------------------------------------------------------------------------
224
225
226
class Chart(object):
227
"""Abstract class for all chart types.
228
229
width are height specify the dimensions of the image. title sets the title
230
of the chart. legend requires a list that corresponds to datasets.
231
"""
232
233
BASE_URL = 'http://chart.apis.google.com/chart?'
234
BACKGROUND = 'bg'
235
CHART = 'c'
236
SOLID = 's'
237
LINEAR_GRADIENT = 'lg'
238
LINEAR_STRIPES = 'ls'
239
240
def __init__(self, width, height, title=None, legend=None, colours=None):
241
assert(type(self) != Chart) # This is an abstract class
242
assert(isinstance(width, int))
243
assert(isinstance(height, int))
244
self.width = width
245
self.height = height
246
self.data = []
247
self.set_title(title)
248
self.set_legend(legend)
249
self.set_colours(colours)
250
self.fill_types = {
251
Chart.BACKGROUND: None,
252
Chart.CHART: None,
253
}
254
self.fill_area = {
255
Chart.BACKGROUND: None,
256
Chart.CHART: None,
257
}
258
# self.axis = {
259
# Axis.TOP: None,
260
# Axis.BOTTOM: None,
261
# Axis.LEFT: None,
262
# Axis.RIGHT: None,
263
# }
264
self.axis = []
265
self.markers = []
266
267
# URL generation
268
# -------------------------------------------------------------------------
269
270
def get_url(self):
271
url_bits = self.get_url_bits()
272
return self.BASE_URL + '&'.join(url_bits)
273
274
def get_url_bits(self):
275
url_bits = []
276
# required arguments
277
url_bits.append(self.type_to_url())
278
url_bits.append('chs=%ix%i' % (self.width, self.height))
279
url_bits.append(self.data_to_url())
280
# optional arguments
281
if self.title:
282
url_bits.append('chtt=%s' % self.title)
283
if self.legend:
284
url_bits.append('chdl=%s' % '|'.join(self.legend))
285
if self.colours:
286
url_bits.append('chco=%s' % ','.join(self.colours))
287
ret = self.fill_to_url()
288
if ret:
289
url_bits.append(ret)
290
ret = self.axis_to_url()
291
if ret:
292
url_bits.append(ret)
293
if self.markers:
294
url_bits.append(self.markers_to_url())
295
return url_bits
296
297
# Downloading
298
# -------------------------------------------------------------------------
299
300
def download(self, file_name):
301
opener = urllib2.urlopen(self.get_url())
302
303
if opener.headers['content-type'] != 'image/png':
304
raise BadContentTypeException('Server responded with a ' \
305
'content-type of %s' % opener.headers['content-type'])
306
307
open(file_name, 'wb').write(urllib.urlopen(self.get_url()).read())
308
309
# Simple settings
310
# -------------------------------------------------------------------------
311
312
def set_title(self, title):
313
if title:
314
self.title = urllib.quote(title)
315
else:
316
self.title = None
317
318
def set_legend(self, legend):
319
# legend needs to be a list, tuple or None
320
assert(isinstance(legend, list) or isinstance(legend, tuple) or
321
legend is None)
322
if legend:
323
self.legend = [urllib.quote(a) for a in legend]
324
else:
325
self.legend = None
326
327
# Chart colours
328
# -------------------------------------------------------------------------
329
330
def set_colours(self, colours):
331
# colours needs to be a list, tuple or None
332
assert(isinstance(colours, list) or isinstance(colours, tuple) or
333
colours is None)
334
# make sure the colours are in the right format
335
if colours:
336
for col in colours:
337
_check_colour(col)
338
self.colours = colours
339
340
# Background/Chart colours
341
# -------------------------------------------------------------------------
342
343
def fill_solid(self, area, colour):
344
assert(area in (Chart.BACKGROUND, Chart.CHART))
345
_check_colour(colour)
346
self.fill_area[area] = colour
347
self.fill_types[area] = Chart.SOLID
348
349
def _check_fill_linear(self, angle, *args):
350
assert(isinstance(args, list) or isinstance(args, tuple))
351
assert(angle >= 0 and angle <= 90)
352
assert(len(args) % 2 == 0)
353
args = list(args) # args is probably a tuple and we need to mutate
354
for a in xrange(len(args) / 2):
355
col = args[a * 2]
356
offset = args[a * 2 + 1]
357
_check_colour(col)
358
assert(offset >= 0 and offset <= 1)
359
args[a * 2 + 1] = str(args[a * 2 + 1])
360
return args
361
362
def fill_linear_gradient(self, area, angle, *args):
363
assert(area in (Chart.BACKGROUND, Chart.CHART))
364
args = self._check_fill_linear(angle, *args)
365
self.fill_types[area] = Chart.LINEAR_GRADIENT
366
self.fill_area[area] = ','.join([str(angle)] + args)
367
368
def fill_linear_stripes(self, area, angle, *args):
369
assert(area in (Chart.BACKGROUND, Chart.CHART))
370
args = self._check_fill_linear(angle, *args)
371
self.fill_types[area] = Chart.LINEAR_STRIPES
372
self.fill_area[area] = ','.join([str(angle)] + args)
373
374
def fill_to_url(self):
375
areas = []
376
for area in (Chart.BACKGROUND, Chart.CHART):
377
if self.fill_types[area]:
378
areas.append('%s,%s,%s' % (area, self.fill_types[area], \
379
self.fill_area[area]))
380
if areas:
381
return 'chf=' + '|'.join(areas)
382
383
# Data
384
# -------------------------------------------------------------------------
385
386
def data_class_detection(self, data):
387
"""
388
Detects and returns the data type required based on the range of the
389
data given. The data given must be lists of numbers within a list.
390
"""
391
assert(isinstance(data, list) or isinstance(data, tuple))
392
max_value = None
393
for a in data:
394
assert(isinstance(a, list) or isinstance(a, tuple))
395
if max_value is None or max(a) > max_value:
396
max_value = max(a)
397
for data_class in (SimpleData, TextData, ExtendedData):
398
if max_value <= data_class.max_value():
399
return data_class
400
raise DataOutOfRangeException()
401
402
def add_data(self, data):
403
self.data.append(data)
404
return len(self.data) - 1 # return the "index" of the data set
405
406
def data_to_url(self, data_class=None):
407
if not data_class:
408
data_class = self.data_class_detection(self.data)
409
if not issubclass(data_class, Data):
410
raise UnknownDataTypeException()
411
return repr(data_class(self.data))
412
413
# Axis Labels
414
# -------------------------------------------------------------------------
415
416
def set_axis_labels(self, axis_type, values):
417
assert(axis_type in Axis.TYPES)
418
values = [ urllib.quote(a) for a in values ]
419
axis_index = len(self.axis)
420
axis = LabelAxis(axis_index, axis_type, values)
421
self.axis.append(axis)
422
return axis_index
423
424
def set_axis_range(self, axis_type, low, high):
425
assert(axis_type in Axis.TYPES)
426
axis_index = len(self.axis)
427
axis = RangeAxis(axis_index, axis_type, low, high)
428
self.axis.append(axis)
429
return axis_index
430
431
def set_axis_positions(self, axis_index, positions):
432
try:
433
self.axis[axis_index].set_positions(positions)
434
except IndexError:
435
raise InvalidParametersException('Axis index %i has not been ' \
436
'created' % axis)
437
438
def set_axis_style(self, axis_index, colour, font_size=None, \
439
alignment=None):
440
try:
441
self.axis[axis_index].set_style(colour, font_size, alignment)
442
except IndexError:
443
raise InvalidParametersException('Axis index %i has not been ' \
444
'created' % axis)
445
446
def axis_to_url(self):
447
available_axis = []
448
label_axis = []
449
range_axis = []
450
positions = []
451
styles = []
452
index = -1
453
for axis in self.axis:
454
available_axis.append(axis.axis_type)
455
if isinstance(axis, RangeAxis):
456
range_axis.append(repr(axis))
457
if isinstance(axis, LabelAxis):
458
label_axis.append(repr(axis))
459
if axis.positions:
460
positions.append(axis.positions_to_url())
461
if axis.has_style:
462
styles.append(axis.style_to_url())
463
if not available_axis:
464
return
465
url_bits = []
466
url_bits.append('chxt=%s' % ','.join(available_axis))
467
if label_axis:
468
url_bits.append('chxl=%s' % '|'.join(label_axis))
469
if range_axis:
470
url_bits.append('chxr=%s' % '|'.join(range_axis))
471
if positions:
472
url_bits.append('chxp=%s' % '|'.join(positions))
473
if styles:
474
url_bits.append('chxs=%s' % '|'.join(styles))
475
return '&'.join(url_bits)
476
477
# Markers, Ranges and Fill area (chm)
478
# -------------------------------------------------------------------------
479
480
def markers_to_url(self):
481
return 'chm=%s' % '|'.join([','.join(a) for a in self.markers])
482
483
def add_marker(self, index, point, marker_type, colour, size):
484
self.markers.append((marker_type, colour, str(index), str(point), \
485
str(size)))
486
487
def add_horizontal_range(self, colour, start, stop):
488
self.markers.append(('r', colour, '1', str(start), str(stop)))
489
490
def add_vertical_range(self, colour, start, stop):
491
self.markers.append(('R', colour, '1', str(start), str(stop)))
492
493
def add_fill_range(self, colour, index_start, index_end):
494
self.markers.append(('b', colour, str(index_start), str(index_end), \
495
'1'))
496
497
def add_fill_simple(self, colour):
498
self.markers.append(('B', colour, '1', '1', '1'))
499
500
501
class ScatterChart(Chart):
502
503
def __init__(self, *args, **kwargs):
504
Chart.__init__(self, *args, **kwargs)
505
506
def type_to_url(self):
507
return 'cht=s'
508
509
510
class LineChart(Chart):
511
512
def __init__(self, *args, **kwargs):
513
assert(type(self) != LineChart) # This is an abstract class
514
Chart.__init__(self, *args, **kwargs)
515
self.line_styles = {}
516
self.grid = None
517
518
def set_line_style(self, index, thickness=1, line_segment=None, \
519
blank_segment=None):
520
value = []
521
value.append(str(thickness))
522
if line_segment:
523
value.append(str(line_segment))
524
value.append(str(blank_segment))
525
self.line_styles[index] = value
526
527
def set_grid(self, x_step, y_step, line_segment=1, \
528
blank_segment=0):
529
self.grid = '%s,%s,%s,%s' % (x_step, y_step, line_segment, \
530
blank_segment)
531
532
def get_url_bits(self):
533
url_bits = Chart.get_url_bits(self)
534
if self.line_styles:
535
style = []
536
# for index, values in self.line_style.items():
537
for index in xrange(max(self.line_styles) + 1):
538
if index in self.line_styles:
539
values = self.line_styles[index]
540
else:
541
values = ('1', )
542
style.append(','.join(values))
543
url_bits.append('chls=%s' % '|'.join(style))
544
if self.grid:
545
url_bits.append('chg=%s' % self.grid)
546
return url_bits
547
548
549
class SimpleLineChart(LineChart):
550
551
def type_to_url(self):
552
return 'cht=lc'
553
554
555
class XYLineChart(LineChart):
556
557
def type_to_url(self):
558
return 'cht=lxy'
559
560
561
class BarChart(Chart):
562
563
def __init__(self, *args, **kwargs):
564
assert(type(self) != BarChart) # This is an abstract class
565
Chart.__init__(self, *args, **kwargs)
566
self.bar_width = None
567
568
def set_bar_width(self, bar_width):
569
self.bar_width = bar_width
570
571
def get_url_bits(self):
572
url_bits = Chart.get_url_bits(self)
573
url_bits.append('chbh=%i' % self.bar_width)
574
return url_bits
575
576
577
class StackedHorizontalBarChart(BarChart):
578
579
def type_to_url(self):
580
return 'cht=bhs'
581
582
583
class StackedVerticalBarChart(BarChart):
584
585
def type_to_url(self):
586
return 'cht=bvs'
587
588
589
class GroupedBarChart(BarChart):
590
591
def __init__(self, *args, **kwargs):
592
assert(type(self) != GroupedBarChart) # This is an abstract class
593
BarChart.__init__(self, *args, **kwargs)
594
self.bar_spacing = None
595
596
def set_bar_spacing(self, spacing):
597
self.bar_spacing = spacing
598
599
def get_url_bits(self):
600
# Skip 'BarChart.get_url_bits' and call Chart directly so the parent
601
# doesn't add "chbh" before we do.
602
url_bits = Chart.get_url_bits(self)
603
if self.bar_spacing is not None:
604
if self.bar_width is None:
605
raise InvalidParametersException('Bar width is required to ' \
606
'be set when setting spacing')
607
url_bits.append('chbh=%i,%i' % (self.bar_width, self.bar_spacing))
608
else:
609
url_bits.append('chbh=%i' % self.bar_width)
610
return url_bits
611
612
613
class GroupedHorizontalBarChart(GroupedBarChart):
614
615
def type_to_url(self):
616
return 'cht=bhg'
617
618
619
class GroupedVerticalBarChart(GroupedBarChart):
620
621
def type_to_url(self):
622
return 'cht=bvg'
623
624
625
class PieChart(Chart):
626
627
def __init__(self, *args, **kwargs):
628
assert(type(self) != PieChart) # This is an abstract class
629
Chart.__init__(self, *args, **kwargs)
630
self.pie_labels = []
631
632
def set_pie_labels(self, labels):
633
self.pie_labels = labels
634
635
def get_url_bits(self):
636
url_bits = Chart.get_url_bits(self)
637
if self.pie_labels:
638
url_bits.append('chl=%s' % '|'.join(self.pie_labels))
639
return url_bits
640
641
642
class PieChart2D(PieChart):
643
644
def type_to_url(self):
645
return 'cht=p'
646
647
648
class PieChart3D(PieChart):
649
650
def type_to_url(self):
651
return 'cht=p3'
652
653
654
class VennChart(Chart):
655
656
def type_to_url(self):
657
return 'cht=v'
658
659
660
def test():
661
chart = GroupedVerticalBarChart(320, 200)
662
chart = PieChart2D(320, 200)
663
chart = ScatterChart(320, 200)
664
chart = SimpleLineChart(320, 200)
665
sine_data = [math.sin(float(a) / 10) * 2000 + 2000 for a in xrange(100)]
666
random_data = [a * random.random() * 30 for a in xrange(40)]
667
random_data2 = [random.random() * 4000 for a in xrange(10)]
668
# chart.set_bar_width(50)
669
# chart.set_bar_spacing(0)
670
chart.add_data(sine_data)
671
chart.add_data(random_data)
672
chart.add_data(random_data2)
673
# chart.set_line_style(1, thickness=2)
674
# chart.set_line_style(2, line_segment=10, blank_segment=5)
675
# chart.set_title('heloooo')
676
# chart.set_legend(('sine wave', 'random * x'))
677
# chart.set_colours(('ee2000', 'DDDDAA', 'fF03f2'))
678
# chart.fill_solid(Chart.BACKGROUND, '123456')
679
# chart.fill_linear_gradient(Chart.CHART, 20, '004070', 1, '300040', 0,
680
# 'aabbcc00', 0.5)
681
# chart.fill_linear_stripes(Chart.CHART, 20, '204070', .2, '300040', .2,
682
# 'aabbcc00', 0.2)
683
axis_left_index = chart.set_axis_range(Axis.LEFT, 0, 10)
684
axis_left_index = chart.set_axis_range(Axis.LEFT, 0, 10)
685
axis_left_index = chart.set_axis_range(Axis.LEFT, 0, 10)
686
axis_right_index = chart.set_axis_range(Axis.RIGHT, 5, 30)
687
axis_bottom_index = chart.set_axis_labels(Axis.BOTTOM, [1, 25, 95])
688
chart.set_axis_positions(axis_bottom_index, [1, 25, 95])
689
chart.set_axis_style(axis_bottom_index, '003050', 15)
690
691
# chart.set_pie_labels(('apples', 'oranges', 'bananas'))
692
693
# chart.set_grid(10, 10)
694
695
# for a in xrange(0, 100, 10):
696
# chart.add_marker(1, a, 'a', 'AACA20', 10)
697
698
chart.add_horizontal_range('00A020', .2, .5)
699
chart.add_vertical_range('00c030', .2, .4)
700
701
chart.add_fill_simple('303030A0')
702
703
chart.download('test.png')
704
705
url = chart.get_url()
706
print url
707
if 0:
708
data = urllib.urlopen(chart.get_url()).read()
709
open('meh.png', 'wb').write(data)
710
os.system('start meh.png')
711
712
713
if __name__ == '__main__':
714
test()
1
"""
2
pygooglechart - A complete Python wrapper for the Google Chart API
3
4
http://pygooglechart.slowchop.com/
5
6
Copyright 2007-2008 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__ = '0.2.2'
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
336
# URL generation
337
# -------------------------------------------------------------------------
338
339
def get_url(self, data_class=None):
340
url_bits = self.get_url_bits(data_class=data_class)
341
return self.BASE_URL + '&'.join(url_bits)
342
343
def get_url_bits(self, data_class=None):
344
url_bits = []
345
# required arguments
346
url_bits.append(self.type_to_url())
347
url_bits.append('chs=%ix%i' % (self.width, self.height))
348
url_bits.append(self.data_to_url(data_class=data_class))
349
# optional arguments
350
if self.title:
351
url_bits.append('chtt=%s' % self.title)
352
if self.title_colour and self.title_font_size:
353
url_bits.append('chts=%s,%s' % (self.title_colour, \
354
self.title_font_size))
355
if self.legend:
356
url_bits.append('chdl=%s' % '%7c'.join(self.legend))
357
if self.legend_position:
358
url_bits.append('chdlp=%s' % (self.legend_position))
359
if self.colours:
360
url_bits.append('chco=%s' % ','.join(self.colours))
361
if self.colours_within_series:
362
url_bits.append('chco=%s' % '%7c'.join(self.colours_within_series))
363
ret = self.fill_to_url()
364
if ret:
365
url_bits.append(ret)
366
ret = self.axis_to_url()
367
if ret:
368
url_bits.append(ret)
369
if self.markers:
370
url_bits.append(self.markers_to_url())
371
if self.line_styles:
372
style = []
373
for index in xrange(max(self.line_styles) + 1):
374
if index in self.line_styles:
375
values = self.line_styles[index]
376
else:
377
values = ('1', )
378
style.append(','.join(values))
379
url_bits.append('chls=%s' % '%7c'.join(style))
380
if self.grid:
381
url_bits.append('chg=%s' % self.grid)
382
return url_bits
383
384
# Downloading
385
# -------------------------------------------------------------------------
386
387
def download(self, file_name):
388
opener = urllib2.urlopen(self.get_url())
389
390
if opener.headers['content-type'] != 'image/png':
391
raise BadContentTypeException('Server responded with a ' \
392
'content-type of %s' % opener.headers['content-type'])
393
394
open(file_name, 'wb').write(opener.read())
395
396
# Simple settings
397
# -------------------------------------------------------------------------
398
399
def set_title(self, title):
400
if title:
401
self.title = urllib.quote(title)
402
else:
403
self.title = None
404
405
def set_title_style(self, colour, font_size):
406
if not colour is None:
407
_check_colour(colour)
408
self.title_colour = colour
409
self.title_font_size = font_size
410
411
def set_legend(self, legend):
412
"""legend needs to be a list, tuple or None"""
413
assert(isinstance(legend, list) or isinstance(legend, tuple) or
414
legend is None)
415
if legend:
416
self.legend = [urllib.quote(a) for a in legend]
417
else:
418
self.legend = None
419
420
def set_legend_position(self, legend_position):
421
if legend_position:
422
self.legend_position = urllib.quote(legend_position)
423
else:
424
self.legend_position = None
425
426
# Chart colours
427
# -------------------------------------------------------------------------
428
429
def set_colours(self, colours):
430
# colours needs to be a list, tuple or None
431
assert(isinstance(colours, list) or isinstance(colours, tuple) or
432
colours is None)
433
# make sure the colours are in the right format
434
if colours:
435
for col in colours:
436
_check_colour(col)
437
self.colours = colours
438
439
def set_colours_within_series(self, colours):
440
# colours needs to be a list, tuple or None
441
assert(isinstance(colours, list) or isinstance(colours, tuple) or
442
colours is None)
443
# make sure the colours are in the right format
444
if colours:
445
for col in colours:
446
_check_colour(col)
447
self.colours_within_series = colours
448
449
# Background/Chart colours
450
# -------------------------------------------------------------------------
451
452
def fill_solid(self, area, colour):
453
assert(area in Chart.VALID_SOLID_FILL_TYPES)
454
_check_colour(colour)
455
self.fill_area[area] = colour
456
self.fill_types[area] = Chart.SOLID
457
458
def _check_fill_linear(self, angle, *args):
459
assert(isinstance(args, list) or isinstance(args, tuple))
460
assert(angle >= 0 and angle <= 90)
461
assert(len(args) % 2 == 0)
462
args = list(args) # args is probably a tuple and we need to mutate
463
for a in xrange(int(len(args) / 2)):
464
col = args[a * 2]
465
offset = args[a * 2 + 1]
466
_check_colour(col)
467
assert(offset >= 0 and offset <= 1)
468
args[a * 2 + 1] = str(args[a * 2 + 1])
469
return args
470
471
def fill_linear_gradient(self, area, angle, *args):
472
assert(area in Chart.VALID_SOLID_FILL_TYPES)
473
args = self._check_fill_linear(angle, *args)
474
self.fill_types[area] = Chart.LINEAR_GRADIENT
475
self.fill_area[area] = ','.join([str(angle)] + args)
476
477
def fill_linear_stripes(self, area, angle, *args):
478
assert(area in Chart.VALID_SOLID_FILL_TYPES)
479
args = self._check_fill_linear(angle, *args)
480
self.fill_types[area] = Chart.LINEAR_STRIPES
481
self.fill_area[area] = ','.join([str(angle)] + args)
482
483
def fill_to_url(self):
484
areas = []
485
for area in (Chart.BACKGROUND, Chart.CHART, Chart.ALPHA):
486
if self.fill_types[area]:
487
areas.append('%s,%s,%s' % (area, self.fill_types[area], \
488
self.fill_area[area]))
489
if areas:
490
return 'chf=' + '%7c'.join(areas)
491
492
# Data
493
# -------------------------------------------------------------------------
494
495
def data_class_detection(self, data):
496
"""Determines the appropriate data encoding type to give satisfactory
497
resolution (http://code.google.com/apis/chart/#chart_data).
498
"""
499
assert(isinstance(data, list) or isinstance(data, tuple))
500
if not isinstance(self, (LineChart, BarChart, ScatterChart)):
501
# From the link above:
502
# Simple encoding is suitable for all other types of chart
503
# regardless of size.
504
return SimpleData
505
elif self.height < 100:
506
# The link above indicates that line and bar charts less
507
# than 300px in size can be suitably represented with the
508
# simple encoding. I've found that this isn't sufficient,
509
# e.g. examples/line-xy-circle.png. Let's try 100px.
510
return SimpleData
511
else:
512
return ExtendedData
513
514
def _filter_none(self, data):
515
return [r for r in data if r is not None]
516
517
def data_x_range(self):
518
"""Return a 2-tuple giving the minimum and maximum x-axis
519
data range.
520
"""
521
try:
522
lower = min([min(self._filter_none(s))
523
for type, s in self.annotated_data()
524
if type == 'x'])
525
upper = max([max(self._filter_none(s))
526
for type, s in self.annotated_data()
527
if type == 'x'])
528
return (lower, upper)
529
except ValueError:
530
return None # no x-axis datasets
531
532
def data_y_range(self):
533
"""Return a 2-tuple giving the minimum and maximum y-axis
534
data range.
535
"""
536
try:
537
lower = min([min(self._filter_none(s))
538
for type, s in self.annotated_data()
539
if type == 'y'])
540
upper = max([max(self._filter_none(s)) + 1
541
for type, s in self.annotated_data()
542
if type == 'y'])
543
return (lower, upper)
544
except ValueError:
545
return None # no y-axis datasets
546
547
def scaled_data(self, data_class, x_range=None, y_range=None):
548
"""Scale `self.data` as appropriate for the given data encoding
549
(data_class) and return it.
550
551
An optional `y_range` -- a 2-tuple (lower, upper) -- can be
552
given to specify the y-axis bounds. If not given, the range is
553
inferred from the data: (0, <max-value>) presuming no negative
554
values, or (<min-value>, <max-value>) if there are negative
555
values. `self.scaled_y_range` is set to the actual lower and
556
upper scaling range.
557
558
Ditto for `x_range`. Note that some chart types don't have x-axis
559
data.
560
"""
561
self.scaled_data_class = data_class
562
563
# Determine the x-axis range for scaling.
564
if x_range is None:
565
x_range = self.data_x_range()
566
if x_range and x_range[0] > 0:
567
x_range = (x_range[0], x_range[1])
568
self.scaled_x_range = x_range
569
570
# Determine the y-axis range for scaling.
571
if y_range is None:
572
y_range = self.data_y_range()
573
if y_range and y_range[0] > 0:
574
y_range = (y_range[0], y_range[1])
575
self.scaled_y_range = y_range
576
577
scaled_data = []
578
for type, dataset in self.annotated_data():
579
if type == 'x':
580
scale_range = x_range
581
elif type == 'y':
582
scale_range = y_range
583
elif type == 'marker-size':
584
scale_range = (0, max(dataset))
585
scaled_dataset = []
586
for v in dataset:
587
if v is None:
588
scaled_dataset.append(None)
589
else:
590
scaled_dataset.append(
591
data_class.scale_value(v, scale_range))
592
scaled_data.append(scaled_dataset)
593
return scaled_data
594
595
def add_data(self, data):
596
self.data.append(data)
597
return len(self.data) - 1 # return the "index" of the data set
598
599
def data_to_url(self, data_class=None):
600
if not data_class:
601
data_class = self.data_class_detection(self.data)
602
if not issubclass(data_class, Data):
603
raise UnknownDataTypeException()
604
if self.auto_scale:
605
data = self.scaled_data(data_class, self.x_range, self.y_range)
606
else:
607
data = self.data
608
return repr(data_class(data))
609
610
def annotated_data(self):
611
for dataset in self.data:
612
yield ('x', dataset)
613
614
# Axis Labels
615
# -------------------------------------------------------------------------
616
617
def set_axis_labels(self, axis_type, values):
618
assert(axis_type in Axis.TYPES)
619
values = [urllib.quote(str(a)) for a in values]
620
axis_index = len(self.axis)
621
axis = LabelAxis(axis_index, axis_type, values)
622
self.axis.append(axis)
623
return axis_index
624
625
def set_axis_range(self, axis_type, low, high):
626
assert(axis_type in Axis.TYPES)
627
axis_index = len(self.axis)
628
axis = RangeAxis(axis_index, axis_type, low, high)
629
self.axis.append(axis)
630
return axis_index
631
632
def set_axis_positions(self, axis_index, positions):
633
try:
634
self.axis[axis_index].set_positions(positions)
635
except IndexError:
636
raise InvalidParametersException('Axis index %i has not been ' \
637
'created' % axis)
638
639
def set_axis_style(self, axis_index, colour, font_size=None, \
640
alignment=None):
641
try:
642
self.axis[axis_index].set_style(colour, font_size, alignment)
643
except IndexError:
644
raise InvalidParametersException('Axis index %i has not been ' \
645
'created' % axis)
646
647
def axis_to_url(self):
648
available_axis = []
649
label_axis = []
650
range_axis = []
651
positions = []
652
styles = []
653
index = -1
654
for axis in self.axis:
655
available_axis.append(axis.axis_type)
656
if isinstance(axis, RangeAxis):
657
range_axis.append(repr(axis))
658
if isinstance(axis, LabelAxis):
659
label_axis.append(repr(axis))
660
if axis.positions:
661
positions.append(axis.positions_to_url())
662
if axis.has_style:
663
styles.append(axis.style_to_url())
664
if not available_axis:
665
return
666
url_bits = []
667
url_bits.append('chxt=%s' % ','.join(available_axis))
668
if label_axis:
669
url_bits.append('chxl=%s' % '%7c'.join(label_axis))
670
if range_axis:
671
url_bits.append('chxr=%s' % '%7c'.join(range_axis))
672
if positions:
673
url_bits.append('chxp=%s' % '%7c'.join(positions))
674
if styles:
675
url_bits.append('chxs=%s' % '%7c'.join(styles))
676
return '&'.join(url_bits)
677
678
# Markers, Ranges and Fill area (chm)
679
# -------------------------------------------------------------------------
680
681
def markers_to_url(self):
682
return 'chm=%s' % '%7c'.join([','.join(a) for a in self.markers])
683
684
def add_marker(self, index, point, marker_type, colour, size, priority=0):
685
self.markers.append((marker_type, colour, str(index), str(point), \
686
str(size), str(priority)))
687
688
def add_horizontal_range(self, colour, start, stop):
689
self.markers.append(('r', colour, '0', str(start), str(stop)))
690
691
def add_data_line(self, colour, data_set, size, priority=0):
692
self.markers.append(('D', colour, str(data_set), '0', str(size), \
693
str(priority)))
694
695
def add_marker_text(self, string, colour, data_set, data_point, size, \
696
priority=0):
697
self.markers.append((str(string), colour, str(data_set), \
698
str(data_point), str(size), str(priority)))
699
700
def add_vertical_range(self, colour, start, stop):
701
self.markers.append(('R', colour, '0', str(start), str(stop)))
702
703
def add_fill_range(self, colour, index_start, index_end):
704
self.markers.append(('b', colour, str(index_start), str(index_end), \
705
'1'))
706
707
def add_fill_simple(self, colour):
708
self.markers.append(('B', colour, '1', '1', '1'))
709
710
# Line styles
711
# -------------------------------------------------------------------------
712
713
def set_line_style(self, index, thickness=1, line_segment=None, \
714
blank_segment=None):
715
value = []
716
value.append(str(thickness))
717
if line_segment:
718
value.append(str(line_segment))
719
value.append(str(blank_segment))
720
self.line_styles[index] = value
721
722
# Grid
723
# -------------------------------------------------------------------------
724
725
def set_grid(self, x_step, y_step, line_segment=1, \
726
blank_segment=0):
727
self.grid = '%s,%s,%s,%s' % (x_step, y_step, line_segment, \
728
blank_segment)
729
730
731
class ScatterChart(Chart):
732
733
def type_to_url(self):
734
return 'cht=s'
735
736
def annotated_data(self):
737
yield ('x', self.data[0])
738
yield ('y', self.data[1])
739
if len(self.data) > 2:
740
# The optional third dataset is relative sizing for point
741
# markers.
742
yield ('marker-size', self.data[2])
743
744
745
class LineChart(Chart):
746
747
def __init__(self, *args, **kwargs):
748
if type(self) == LineChart:
749
raise AbstractClassException('This is an abstract class')
750
Chart.__init__(self, *args, **kwargs)
751
752
753
class SimpleLineChart(LineChart):
754
755
def type_to_url(self):
756
return 'cht=lc'
757
758
def annotated_data(self):
759
# All datasets are y-axis data.
760
for dataset in self.data:
761
yield ('y', dataset)
762
763
764
class SparkLineChart(SimpleLineChart):
765
766
def type_to_url(self):
767
return 'cht=ls'
768
769
770
class XYLineChart(LineChart):
771
772
def type_to_url(self):
773
return 'cht=lxy'
774
775
def annotated_data(self):
776
# Datasets alternate between x-axis, y-axis.
777
for i, dataset in enumerate(self.data):
778
if i % 2 == 0:
779
yield ('x', dataset)
780
else:
781
yield ('y', dataset)
782
783
784
class BarChart(Chart):
785
786
def __init__(self, *args, **kwargs):
787
if type(self) == BarChart:
788
raise AbstractClassException('This is an abstract class')
789
Chart.__init__(self, *args, **kwargs)
790
self.bar_width = None
791
self.zero_lines = {}
792
793
def set_bar_width(self, bar_width):
794
self.bar_width = bar_width
795
796
def set_zero_line(self, index, zero_line):
797
self.zero_lines[index] = zero_line
798
799
def get_url_bits(self, data_class=None, skip_chbh=False):
800
url_bits = Chart.get_url_bits(self, data_class=data_class)
801
if not skip_chbh and self.bar_width is not None:
802
url_bits.append('chbh=%i' % self.bar_width)
803
zero_line = []
804
if self.zero_lines:
805
for index in xrange(max(self.zero_lines) + 1):
806
if index in self.zero_lines:
807
zero_line.append(str(self.zero_lines[index]))
808
else:
809
zero_line.append('0')
810
url_bits.append('chp=%s' % ','.join(zero_line))
811
return url_bits
812
813
814
class StackedHorizontalBarChart(BarChart):
815
816
def type_to_url(self):
817
return 'cht=bhs'
818
819
820
class StackedVerticalBarChart(BarChart):
821
822
def type_to_url(self):
823
return 'cht=bvs'
824
825
def annotated_data(self):
826
for dataset in self.data:
827
yield ('y', dataset)
828
829
830
class GroupedBarChart(BarChart):
831
832
def __init__(self, *args, **kwargs):
833
if type(self) == GroupedBarChart:
834
raise AbstractClassException('This is an abstract class')
835
BarChart.__init__(self, *args, **kwargs)
836
self.bar_spacing = None
837
self.group_spacing = None
838
839
def set_bar_spacing(self, spacing):
840
"""Set spacing between bars in a group."""
841
self.bar_spacing = spacing
842
843
def set_group_spacing(self, spacing):
844
"""Set spacing between groups of bars."""
845
self.group_spacing = spacing
846
847
def get_url_bits(self, data_class=None):
848
# Skip 'BarChart.get_url_bits' and call Chart directly so the parent
849
# doesn't add "chbh" before we do.
850
url_bits = BarChart.get_url_bits(self, data_class=data_class,
851
skip_chbh=True)
852
if self.group_spacing is not None:
853
if self.bar_spacing is None:
854
raise InvalidParametersException('Bar spacing is required ' \
855
'to be set when setting group spacing')
856
if self.bar_width is None:
857
raise InvalidParametersException('Bar width is required to ' \
858
'be set when setting bar spacing')
859
url_bits.append('chbh=%i,%i,%i'
860
% (self.bar_width, self.bar_spacing, self.group_spacing))
861
elif self.bar_spacing is not None:
862
if self.bar_width is None:
863
raise InvalidParametersException('Bar width is required to ' \
864
'be set when setting bar spacing')
865
url_bits.append('chbh=%i,%i' % (self.bar_width, self.bar_spacing))
866
elif self.bar_width:
867
url_bits.append('chbh=%i' % self.bar_width)
868
return url_bits
869
870
871
class GroupedHorizontalBarChart(GroupedBarChart):
872
873
def type_to_url(self):
874
return 'cht=bhg'
875
876
877
class GroupedVerticalBarChart(GroupedBarChart):
878
879
def type_to_url(self):
880
return 'cht=bvg'
881
882
def annotated_data(self):
883
for dataset in self.data:
884
yield ('y', dataset)
885
886
887
class PieChart(Chart):
888
889
def __init__(self, *args, **kwargs):
890
if type(self) == PieChart:
891
raise AbstractClassException('This is an abstract class')
892
Chart.__init__(self, *args, **kwargs)
893
self.pie_labels = []
894
if self.y_range:
895
warnings.warn('y_range is not used with %s.' % \
896
(self.__class__.__name__))
897
898
def set_pie_labels(self, labels):
899
self.pie_labels = [urllib.quote(a) for a in labels]
900
901
def get_url_bits(self, data_class=None):
902
url_bits = Chart.get_url_bits(self, data_class=data_class)
903
if self.pie_labels:
904
url_bits.append('chl=%s' % '%7c'.join(self.pie_labels))
905
return url_bits
906
907
def annotated_data(self):
908
# Datasets are all y-axis data. However, there should only be
909
# one dataset for pie charts.
910
for dataset in self.data:
911
yield ('x', dataset)
912
913
def scaled_data(self, data_class, x_range=None, y_range=None):
914
if not x_range:
915
x_range = [0, sum(self.data[0])]
916
return Chart.scaled_data(self, data_class, x_range, self.y_range)
917
918
919
class PieChart2D(PieChart):
920
921
def type_to_url(self):
922
return 'cht=p'
923
924
925
class PieChart3D(PieChart):
926
927
def type_to_url(self):
928
return 'cht=p3'
929
930
931
class VennChart(Chart):
932
933
def type_to_url(self):
934
return 'cht=v'
935
936
def annotated_data(self):
937
for dataset in self.data:
938
yield ('y', dataset)
939
940
941
class RadarChart(Chart):
942
943
def type_to_url(self):
944
return 'cht=r'
945
946
947
class SplineRadarChart(RadarChart):
948
949
def type_to_url(self):
950
return 'cht=rs'
951
952
953
class MapChart(Chart):
954
955
def __init__(self, *args, **kwargs):
956
Chart.__init__(self, *args, **kwargs)
957
self.geo_area = 'world'
958
self.codes = []
959
self.__areas = ('africa', 'asia', 'europe', 'middle_east', 'south_america', 'usa', 'world')
960
self.__ccodes = ('AD', 'AE', 'AF', 'AG', 'AI', 'AL', 'AM', 'AN', 'AO', 'AQ', 'AR',
961
'AS', 'AT', 'AU', 'AW', 'AX', 'AZ', 'BA', 'BB', 'BD', 'BE', 'BF',
962
'BG', 'BH', 'BI', 'BJ', 'BL', 'BM', 'BN', 'BO', 'BR', 'BS', 'BT',
963
'BV', 'BW', 'BY', 'BZ', 'CA', 'CC', 'CD', 'CF', 'CG', 'CH', 'CI',
964
'CK', 'CL', 'CM', 'CN', 'CO', 'CR', 'CU', 'CV', 'CX', 'CY', 'CZ',
965
'DE', 'DJ', 'DK', 'DM', 'DO', 'DZ', 'EC', 'EE', 'EG', 'EH', 'ER',
966
'ES', 'ET', 'FI', 'FJ', 'FK', 'FM', 'FO', 'FR', 'GA', 'GB', 'GD',
967
'GE', 'GF', 'GG', 'GH', 'GI', 'GL', 'GM', 'GN', 'GP', 'GQ', 'GR',
968
'GS', 'GT', 'GU', 'GW', 'GY', 'HK', 'HM', 'HN', 'HR', 'HT', 'HU',
969
'ID', 'IE', 'IL', 'IM', 'IN', 'IO', 'IQ', 'IR', 'IS', 'IT', 'JE',
970
'JM', 'JO', 'JP', 'KE', 'KG', 'KH', 'KI', 'KM', 'KN', 'KP', 'KR',
971
'KW', 'KY', 'KZ', 'LA', 'LB', 'LC', 'LI', 'LK', 'LR', 'LS', 'LT',
972
'LU', 'LV', 'LY', 'MA', 'MC', 'MD', 'ME', 'MF', 'MG', 'MH', 'MK',
973
'ML', 'MM', 'MN', 'MO', 'MP', 'MQ', 'MR', 'MS', 'MT', 'MU', 'MV',
974
'MW', 'MX', 'MY', 'MZ', 'NA', 'NC', 'NE', 'NF', 'NG', 'NI', 'NL',
975
'NO', 'NP', 'NR', 'NU', 'NZ', 'OM', 'PA', 'PE', 'PF', 'PG', 'PH',
976
'PK', 'PL', 'PM', 'PN', 'PR', 'PS', 'PT', 'PW', 'PY', 'QA', 'RE',
977
'RO', 'RS', 'RU', 'RW', 'SA', 'SB', 'SC', 'SD', 'SE', 'SG', 'SH',
978
'SI', 'SJ', 'SK', 'SL', 'SM', 'SN', 'SO', 'SR', 'ST', 'SV', 'SY',
979
'SZ', 'TC', 'TD', 'TF', 'TG', 'TH', 'TJ', 'TK', 'TL', 'TM', 'TN',
980
'TO', 'TR', 'TT', 'TV', 'TW', 'TZ', 'UA', 'UG', 'UM', 'US', 'UY',
981
'UZ', 'VA', 'VC', 'VE', 'VG', 'VI', 'VN', 'VU', 'WF', 'WS', 'YE',
982
'YT', 'ZA', 'ZM', 'ZW')
983
984
def type_to_url(self):
985
return 'cht=t'
986
987
def set_codes(self, codes):
988
'''Set the country code map for the data.
989
Codes given in a list.
990
991
i.e. DE - Germany
992
AT - Austria
993
US - United States
994
'''
995
996
codemap = ''
997
998
for cc in codes:
999
cc = cc.upper()
1000
if cc in self.__ccodes:
1001
codemap += cc
1002
else:
1003
raise UnknownCountryCodeException(cc)
1004
1005
self.codes = codemap
1006
1007
def set_geo_area(self, area):
1008
'''Sets the geo area for the map.
1009
1010
* africa
1011
* asia
1012
* europe
1013
* middle_east
1014
* south_america
1015
* usa
1016
* world
1017
'''
1018
1019
if area in self.__areas:
1020
self.geo_area = area
1021
else:
1022
raise UnknownChartType('Unknown chart type for maps: %s' %area)
1023
1024
def get_url_bits(self, data_class=None):
1025
url_bits = Chart.get_url_bits(self, data_class=data_class)
1026
url_bits.append('chtm=%s' % self.geo_area)
1027
if self.codes:
1028
url_bits.append('chld=%s' % ''.join(self.codes))
1029
return url_bits
1030
1031
def add_data_dict(self, datadict):
1032
'''Sets the data and country codes via a dictionary.
1033
1034
i.e. {'DE': 50, 'GB': 30, 'AT': 70}
1035
'''
1036
1037
self.set_codes(datadict.keys())
1038
self.add_data(datadict.values())
1039
1040
1041
class GoogleOMeterChart(PieChart):
1042
"""Inheriting from PieChart because of similar labeling"""
1043
1044
def __init__(self, *args, **kwargs):
1045
PieChart.__init__(self, *args, **kwargs)
1046
if self.auto_scale and not self.x_range:
1047
warnings.warn('Please specify an x_range with GoogleOMeterChart, '
1048
'otherwise one arrow will always be at the max.')
1049
1050
def type_to_url(self):
1051
return 'cht=gom'
1052
1053
1054
class QRChart(Chart):
1055
1056
def __init__(self, *args, **kwargs):
1057
Chart.__init__(self, *args, **kwargs)
1058
self.encoding = None
1059
self.ec_level = None
1060
self.margin = None
1061
1062
def type_to_url(self):
1063
return 'cht=qr'
1064
1065
def data_to_url(self, data_class=None):
1066
if not self.data:
1067
raise NoDataGivenException()
1068
return 'chl=%s' % urllib.quote(self.data[0])
1069
1070
def get_url_bits(self, data_class=None):
1071
url_bits = Chart.get_url_bits(self, data_class=data_class)
1072
if self.encoding:
1073
url_bits.append('choe=%s' % self.encoding)
1074
if self.ec_level:
1075
url_bits.append('chld=%s%%7c%s' % (self.ec_level, self.margin))
1076
return url_bits
1077
1078
def set_encoding(self, encoding):
1079
self.encoding = encoding
1080
1081
def set_ec(self, level, margin):
1082
self.ec_level = level
1083
self.margin = margin
1084
1085
1086
class ChartGrammar(object):
1087
1088
def __init__(self):
1089
self.grammar = None
1090
self.chart = None
1091
1092
def parse(self, grammar):
1093
self.grammar = grammar
1094
self.chart = self.create_chart_instance()
1095
1096
for attr in self.grammar:
1097
if attr in ('w', 'h', 'type', 'auto_scale', 'x_range', 'y_range'):
1098
continue # These are already parsed in create_chart_instance
1099
attr_func = 'parse_' + attr
1100
if not hasattr(self, attr_func):
1101
warnings.warn('No parser for grammar attribute "%s"' % (attr))
1102
continue
1103
getattr(self, attr_func)(grammar[attr])
1104
1105
return self.chart
1106
1107
def parse_data(self, data):
1108
self.chart.data = data
1109
1110
@staticmethod
1111
def get_possible_chart_types():
1112
possible_charts = []
1113
for cls_name in globals().keys():
1114
if not cls_name.endswith('Chart'):
1115
continue
1116
cls = globals()[cls_name]
1117
# Check if it is an abstract class
1118
try:
1119
a = cls(1, 1, auto_scale=False)
1120
del a
1121
except AbstractClassException:
1122
continue
1123
# Strip off "Class"
1124
possible_charts.append(cls_name[:-5])
1125
return possible_charts
1126
1127
def create_chart_instance(self, grammar=None):
1128
if not grammar:
1129
grammar = self.grammar
1130
assert(isinstance(grammar, dict)) # grammar must be a dict
1131
assert('w' in grammar) # width is required
1132
assert('h' in grammar) # height is required
1133
assert('type' in grammar) # type is required
1134
chart_type = grammar['type']
1135
w = grammar['w']
1136
h = grammar['h']
1137
auto_scale = grammar.get('auto_scale', None)
1138
x_range = grammar.get('x_range', None)
1139
y_range = grammar.get('y_range', None)
1140
types = ChartGrammar.get_possible_chart_types()
1141
if chart_type not in types:
1142
raise UnknownChartType('%s is an unknown chart type. Possible '
1143
'chart types are %s' % (chart_type, ','.join(types)))
1144
return globals()[chart_type + 'Chart'](w, h, auto_scale=auto_scale,
1145
x_range=x_range, y_range=y_range)
1146
1147
def download(self):
1148
pass
1149
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0