To get this branch, use:
bzr branch
http://gegoxaren.bato24.eu/bzr/%2Bjunk/pygooglechart-py3k
« back to all changes in this revision
Viewing changes to pygooglechart.py
- browse files at revision 8
- compare with another revision
- download diff
- download tarball
- view history from revision 8
- Committer: gak
- Date: 2007-12-13 23:04:28 UTC
- Revision ID: git-v1:ad594da292ccb166e3762f89a80662a9f0c41ca3
Refactored axis to allow multiple axis labels
- files removed:
- .bzrignore
- 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/
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 urllib.request, urllib.error
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
return self.BASE_URL + '?' + self.get_url_extension(data_class)
343
344
def get_url_extension(self, data_class=None):
345
url_bits = self.get_url_bits(data_class=data_class)
346
return '&'.join(url_bits)
347
348
def get_url_bits(self, data_class=None):
349
url_bits = []
350
# required arguments
351
url_bits.append(self.type_to_url())
352
url_bits.append('chs=%ix%i' % (self.width, self.height))
353
url_bits.append(self.data_to_url(data_class=data_class))
354
# optional arguments
355
if self.title:
356
url_bits.append('chtt=%s' % self.title)
357
if self.title_colour and self.title_font_size:
358
url_bits.append('chts=%s,%s' % (self.title_colour, \
359
self.title_font_size))
360
if self.legend:
361
url_bits.append('chdl=%s' % '%7c'.join(self.legend))
362
if self.legend_position:
363
url_bits.append('chdlp=%s' % (self.legend_position))
364
if self.colours:
365
url_bits.append('chco=%s' % ','.join(self.colours))
366
if self.colours_within_series:
367
url_bits.append('chco=%s' % '%7c'.join(self.colours_within_series))
368
ret = self.fill_to_url()
369
if ret:
370
url_bits.append(ret)
371
ret = self.axis_to_url()
372
if ret:
373
url_bits.append(ret)
374
if self.markers:
375
url_bits.append(self.markers_to_url())
376
if self.line_styles:
377
style = []
378
for index in range(max(self.line_styles) + 1):
379
if index in self.line_styles:
380
values = self.line_styles[index]
381
else:
382
values = ('1', )
383
style.append(','.join(values))
384
url_bits.append('chls=%s' % '%7c'.join(style))
385
if self.grid:
386
url_bits.append('chg=%s' % self.grid)
387
return url_bits
388
389
# Downloading
390
# -------------------------------------------------------------------------
391
392
def download(self, file_name, use_post=True):
393
if use_post:
394
opener = urllib.request.urlopen(self.BASE_URL, self.get_url_extension())
395
else:
396
opener = urllib.request.urlopen(self.get_url())
397
398
if opener.headers['content-type'] != 'image/png':
399
raise BadContentTypeException('Server responded with a ' \
400
'content-type of %s' % opener.headers['content-type'])
401
402
open(file_name, 'wb').write(opener.read())
403
404
# Simple settings
405
# -------------------------------------------------------------------------
406
407
def set_title(self, title):
408
if title:
409
self.title = urllib.parse.quote(title)
410
else:
411
self.title = None
412
413
def set_title_style(self, colour=None, font_size=None):
414
if not colour is None:
415
_check_colour(colour)
416
if not colour and not font_size:
417
return
418
self.title_colour = colour or '333333'
419
self.title_font_size = font_size or 13.5
420
421
def set_legend(self, legend):
422
"""legend needs to be a list, tuple or None"""
423
assert(isinstance(legend, list) or isinstance(legend, tuple) or
424
legend is None)
425
if legend:
426
self.legend = [urllib.parse.quote(a) for a in legend]
427
else:
428
self.legend = None
429
430
def set_legend_position(self, legend_position):
431
if legend_position:
432
self.legend_position = urllib.parse.quote(legend_position)
433
else:
434
self.legend_position = None
435
436
# Chart colours
437
# -------------------------------------------------------------------------
438
439
def set_colours(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 = colours
448
449
def set_colours_within_series(self, colours):
450
# colours needs to be a list, tuple or None
451
assert(isinstance(colours, list) or isinstance(colours, tuple) or
452
colours is None)
453
# make sure the colours are in the right format
454
if colours:
455
for col in colours:
456
_check_colour(col)
457
self.colours_within_series = colours
458
459
# Background/Chart colours
460
# -------------------------------------------------------------------------
461
462
def fill_solid(self, area, colour):
463
assert(area in Chart.VALID_SOLID_FILL_TYPES)
464
_check_colour(colour)
465
self.fill_area[area] = colour
466
self.fill_types[area] = Chart.SOLID
467
468
def _check_fill_linear(self, angle, *args):
469
assert(isinstance(args, list) or isinstance(args, tuple))
470
assert(angle >= 0 and angle <= 90)
471
assert(len(args) % 2 == 0)
472
args = list(args) # args is probably a tuple and we need to mutate
473
for a in range(int(len(args) / 2)):
474
col = args[a * 2]
475
offset = args[a * 2 + 1]
476
_check_colour(col)
477
assert(offset >= 0 and offset <= 1)
478
args[a * 2 + 1] = str(args[a * 2 + 1])
479
return args
480
481
def fill_linear_gradient(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_GRADIENT
485
self.fill_area[area] = ','.join([str(angle)] + args)
486
487
def fill_linear_stripes(self, area, angle, *args):
488
assert(area in Chart.VALID_SOLID_FILL_TYPES)
489
args = self._check_fill_linear(angle, *args)
490
self.fill_types[area] = Chart.LINEAR_STRIPES
491
self.fill_area[area] = ','.join([str(angle)] + args)
492
493
def fill_to_url(self):
494
areas = []
495
for area in (Chart.BACKGROUND, Chart.CHART, Chart.ALPHA):
496
if self.fill_types[area]:
497
areas.append('%s,%s,%s' % (area, self.fill_types[area], \
498
self.fill_area[area]))
499
if areas:
500
return 'chf=' + '%7c'.join(areas)
501
502
# Data
503
# -------------------------------------------------------------------------
504
505
def data_class_detection(self, data):
506
"""Determines the appropriate data encoding type to give satisfactory
507
resolution (http://code.google.com/apis/chart/#chart_data).
508
"""
509
assert(isinstance(data, list) or isinstance(data, tuple))
510
if not isinstance(self, (LineChart, BarChart, ScatterChart)):
511
# From the link above:
512
# Simple encoding is suitable for all other types of chart
513
# regardless of size.
514
return SimpleData
515
elif self.height < 100:
516
# The link above indicates that line and bar charts less
517
# than 300px in size can be suitably represented with the
518
# simple encoding. I've found that this isn't sufficient,
519
# e.g. examples/line-xy-circle.png. Let's try 100px.
520
return SimpleData
521
else:
522
return ExtendedData
523
524
def _filter_none(self, data):
525
return [r for r in data if r is not None]
526
527
def data_x_range(self):
528
"""Return a 2-tuple giving the minimum and maximum x-axis
529
data range.
530
"""
531
try:
532
lower = min([min(self._filter_none(s))
533
for type, s in self.annotated_data()
534
if type == 'x'])
535
upper = max([max(self._filter_none(s))
536
for type, s in self.annotated_data()
537
if type == 'x'])
538
return (lower, upper)
539
except ValueError:
540
return None # no x-axis datasets
541
542
def data_y_range(self):
543
"""Return a 2-tuple giving the minimum and maximum y-axis
544
data range.
545
"""
546
try:
547
lower = min([min(self._filter_none(s))
548
for type, s in self.annotated_data()
549
if type == 'y'])
550
upper = max([max(self._filter_none(s)) + 1
551
for type, s in self.annotated_data()
552
if type == 'y'])
553
return (lower, upper)
554
except ValueError:
555
return None # no y-axis datasets
556
557
def scaled_data(self, data_class, x_range=None, y_range=None):
558
"""Scale `self.data` as appropriate for the given data encoding
559
(data_class) and return it.
560
561
An optional `y_range` -- a 2-tuple (lower, upper) -- can be
562
given to specify the y-axis bounds. If not given, the range is
563
inferred from the data: (0, <max-value>) presuming no negative
564
values, or (<min-value>, <max-value>) if there are negative
565
values. `self.scaled_y_range` is set to the actual lower and
566
upper scaling range.
567
568
Ditto for `x_range`. Note that some chart types don't have x-axis
569
data.
570
"""
571
self.scaled_data_class = data_class
572
573
# Determine the x-axis range for scaling.
574
if x_range is None:
575
x_range = self.data_x_range()
576
if x_range and x_range[0] > 0:
577
x_range = (x_range[0], x_range[1])
578
self.scaled_x_range = x_range
579
580
# Determine the y-axis range for scaling.
581
if y_range is None:
582
y_range = self.data_y_range()
583
if y_range and y_range[0] > 0:
584
y_range = (y_range[0], y_range[1])
585
self.scaled_y_range = y_range
586
587
scaled_data = []
588
for type, dataset in self.annotated_data():
589
if type == 'x':
590
scale_range = x_range
591
elif type == 'y':
592
scale_range = y_range
593
elif type == 'marker-size':
594
scale_range = (0, max(dataset))
595
scaled_dataset = []
596
for v in dataset:
597
if v is None:
598
scaled_dataset.append(None)
599
else:
600
scaled_dataset.append(
601
data_class.scale_value(v, scale_range))
602
scaled_data.append(scaled_dataset)
603
return scaled_data
604
605
def add_data(self, data):
606
self.data.append(data)
607
return len(self.data) - 1 # return the "index" of the data set
608
609
def data_to_url(self, data_class=None):
610
if not data_class:
611
data_class = self.data_class_detection(self.data)
612
if not issubclass(data_class, Data):
613
raise UnknownDataTypeException()
614
if self.auto_scale:
615
data = self.scaled_data(data_class, self.x_range, self.y_range)
616
else:
617
data = self.data
618
return repr(data_class(data))
619
620
def annotated_data(self):
621
for dataset in self.data:
622
yield ('x', dataset)
623
624
# Axis Labels
625
# -------------------------------------------------------------------------
626
627
def set_axis_labels(self, axis_type, values):
628
assert(axis_type in Axis.TYPES)
629
values = [urllib.parse.quote(str(a)) for a in values]
630
axis_index = len(self.axis)
631
axis = LabelAxis(axis_index, axis_type, values)
632
self.axis.append(axis)
633
return axis_index
634
635
def set_axis_range(self, axis_type, low, high):
636
assert(axis_type in Axis.TYPES)
637
axis_index = len(self.axis)
638
axis = RangeAxis(axis_index, axis_type, low, high)
639
self.axis.append(axis)
640
return axis_index
641
642
def set_axis_positions(self, axis_index, positions):
643
try:
644
self.axis[axis_index].set_positions(positions)
645
except IndexError:
646
raise InvalidParametersException('Axis index %i has not been ' \
647
'created' % axis)
648
649
def set_axis_style(self, axis_index, colour, font_size=None, \
650
alignment=None):
651
try:
652
self.axis[axis_index].set_style(colour, font_size, alignment)
653
except IndexError:
654
raise InvalidParametersException('Axis index %i has not been ' \
655
'created' % axis)
656
657
def axis_to_url(self):
658
available_axis = []
659
label_axis = []
660
range_axis = []
661
positions = []
662
styles = []
663
index = -1
664
for axis in self.axis:
665
available_axis.append(axis.axis_type)
666
if isinstance(axis, RangeAxis):
667
range_axis.append(repr(axis))
668
if isinstance(axis, LabelAxis):
669
label_axis.append(repr(axis))
670
if axis.positions:
671
positions.append(axis.positions_to_url())
672
if axis.has_style:
673
styles.append(axis.style_to_url())
674
if not available_axis:
675
return
676
url_bits = []
677
url_bits.append('chxt=%s' % ','.join(available_axis))
678
if label_axis:
679
url_bits.append('chxl=%s' % '%7c'.join(label_axis))
680
if range_axis:
681
url_bits.append('chxr=%s' % '%7c'.join(range_axis))
682
if positions:
683
url_bits.append('chxp=%s' % '%7c'.join(positions))
684
if styles:
685
url_bits.append('chxs=%s' % '%7c'.join(styles))
686
return '&'.join(url_bits)
687
688
# Markers, Ranges and Fill area (chm)
689
# -------------------------------------------------------------------------
690
691
def markers_to_url(self):
692
return 'chm=%s' % '%7c'.join([','.join(a) for a in self.markers])
693
694
def add_marker(self, index, point, marker_type, colour, size, priority=0):
695
self.markers.append((marker_type, colour, str(index), str(point), \
696
str(size), str(priority)))
697
698
def add_horizontal_range(self, colour, start, stop):
699
self.markers.append(('r', colour, '0', str(start), str(stop)))
700
701
def add_data_line(self, colour, data_set, size, priority=0):
702
self.markers.append(('D', colour, str(data_set), '0', str(size), \
703
str(priority)))
704
705
def add_marker_text(self, string, colour, data_set, data_point, size, \
706
priority=0):
707
self.markers.append((str(string), colour, str(data_set), \
708
str(data_point), str(size), str(priority)))
709
710
def add_vertical_range(self, colour, start, stop):
711
self.markers.append(('R', colour, '0', str(start), str(stop)))
712
713
def add_fill_range(self, colour, index_start, index_end):
714
self.markers.append(('b', colour, str(index_start), str(index_end), \
715
'1'))
716
717
def add_fill_simple(self, colour):
718
self.markers.append(('B', colour, '1', '1', '1'))
719
720
# Line styles
721
# -------------------------------------------------------------------------
722
723
def set_line_style(self, index, thickness=1, line_segment=None, \
724
blank_segment=None):
725
value = []
726
value.append(str(thickness))
727
if line_segment:
728
value.append(str(line_segment))
729
value.append(str(blank_segment))
730
self.line_styles[index] = value
731
732
# Grid
733
# -------------------------------------------------------------------------
734
735
def set_grid(self, x_step, y_step, line_segment=1, \
736
blank_segment=0):
737
self.grid = '%s,%s,%s,%s' % (x_step, y_step, line_segment, \
738
blank_segment)
739
740
741
class ScatterChart(Chart):
742
743
def type_to_url(self):
744
return 'cht=s'
745
746
def annotated_data(self):
747
yield ('x', self.data[0])
748
yield ('y', self.data[1])
749
if len(self.data) > 2:
750
# The optional third dataset is relative sizing for point
751
# markers.
752
yield ('marker-size', self.data[2])
753
754
755
class LineChart(Chart):
756
757
def __init__(self, *args, **kwargs):
758
if type(self) == LineChart:
759
raise AbstractClassException('This is an abstract class')
760
Chart.__init__(self, *args, **kwargs)
761
762
763
class SimpleLineChart(LineChart):
764
765
def type_to_url(self):
766
return 'cht=lc'
767
768
def annotated_data(self):
769
# All datasets are y-axis data.
770
for dataset in self.data:
771
yield ('y', dataset)
772
773
774
class SparkLineChart(SimpleLineChart):
775
776
def type_to_url(self):
777
return 'cht=ls'
778
779
780
class XYLineChart(LineChart):
781
782
def type_to_url(self):
783
return 'cht=lxy'
784
785
def annotated_data(self):
786
# Datasets alternate between x-axis, y-axis.
787
for i, dataset in enumerate(self.data):
788
if i % 2 == 0:
789
yield ('x', dataset)
790
else:
791
yield ('y', dataset)
792
793
794
class BarChart(Chart):
795
796
def __init__(self, *args, **kwargs):
797
if type(self) == BarChart:
798
raise AbstractClassException('This is an abstract class')
799
Chart.__init__(self, *args, **kwargs)
800
self.bar_width = None
801
self.zero_lines = {}
802
803
def set_bar_width(self, bar_width):
804
self.bar_width = bar_width
805
806
def set_zero_line(self, index, zero_line):
807
self.zero_lines[index] = zero_line
808
809
def get_url_bits(self, data_class=None, skip_chbh=False):
810
url_bits = Chart.get_url_bits(self, data_class=data_class)
811
if not skip_chbh and self.bar_width is not None:
812
url_bits.append('chbh=%i' % self.bar_width)
813
zero_line = []
814
if self.zero_lines:
815
for index in range(max(self.zero_lines) + 1):
816
if index in self.zero_lines:
817
zero_line.append(str(self.zero_lines[index]))
818
else:
819
zero_line.append('0')
820
url_bits.append('chp=%s' % ','.join(zero_line))
821
return url_bits
822
823
824
class StackedHorizontalBarChart(BarChart):
825
826
def type_to_url(self):
827
return 'cht=bhs'
828
829
830
class StackedVerticalBarChart(BarChart):
831
832
def type_to_url(self):
833
return 'cht=bvs'
834
835
def annotated_data(self):
836
for dataset in self.data:
837
yield ('y', dataset)
838
839
840
class GroupedBarChart(BarChart):
841
842
def __init__(self, *args, **kwargs):
843
if type(self) == GroupedBarChart:
844
raise AbstractClassException('This is an abstract class')
845
BarChart.__init__(self, *args, **kwargs)
846
self.bar_spacing = None
847
self.group_spacing = None
848
849
def set_bar_spacing(self, spacing):
850
"""Set spacing between bars in a group."""
851
self.bar_spacing = spacing
852
853
def set_group_spacing(self, spacing):
854
"""Set spacing between groups of bars."""
855
self.group_spacing = spacing
856
857
def get_url_bits(self, data_class=None):
858
# Skip 'BarChart.get_url_bits' and call Chart directly so the parent
859
# doesn't add "chbh" before we do.
860
url_bits = BarChart.get_url_bits(self, data_class=data_class,
861
skip_chbh=True)
862
if self.group_spacing is not None:
863
if self.bar_spacing is None:
864
raise InvalidParametersException('Bar spacing is required ' \
865
'to be set when setting group spacing')
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,%i'
870
% (self.bar_width, self.bar_spacing, self.group_spacing))
871
elif self.bar_spacing is not None:
872
if self.bar_width is None:
873
raise InvalidParametersException('Bar width is required to ' \
874
'be set when setting bar spacing')
875
url_bits.append('chbh=%i,%i' % (self.bar_width, self.bar_spacing))
876
elif self.bar_width:
877
url_bits.append('chbh=%i' % self.bar_width)
878
return url_bits
879
880
881
class GroupedHorizontalBarChart(GroupedBarChart):
882
883
def type_to_url(self):
884
return 'cht=bhg'
885
886
887
class GroupedVerticalBarChart(GroupedBarChart):
888
889
def type_to_url(self):
890
return 'cht=bvg'
891
892
def annotated_data(self):
893
for dataset in self.data:
894
yield ('y', dataset)
895
896
897
class PieChart(Chart):
898
899
def __init__(self, *args, **kwargs):
900
if type(self) == PieChart:
901
raise AbstractClassException('This is an abstract class')
902
Chart.__init__(self, *args, **kwargs)
903
self.pie_labels = []
904
if self.y_range:
905
warnings.warn('y_range is not used with %s.' % \
906
(self.__class__.__name__))
907
908
def set_pie_labels(self, labels):
909
self.pie_labels = [urllib.parse.quote(a) for a in labels]
910
911
def get_url_bits(self, data_class=None):
912
url_bits = Chart.get_url_bits(self, data_class=data_class)
913
if self.pie_labels:
914
url_bits.append('chl=%s' % '%7c'.join(self.pie_labels))
915
return url_bits
916
917
def annotated_data(self):
918
# Datasets are all y-axis data. However, there should only be
919
# one dataset for pie charts.
920
for dataset in self.data:
921
yield ('x', dataset)
922
923
def scaled_data(self, data_class, x_range=None, y_range=None):
924
if not x_range:
925
x_range = [0, sum(self.data[0])]
926
return Chart.scaled_data(self, data_class, x_range, self.y_range)
927
928
929
class PieChart2D(PieChart):
930
931
def type_to_url(self):
932
return 'cht=p'
933
934
935
class PieChart3D(PieChart):
936
937
def type_to_url(self):
938
return 'cht=p3'
939
940
941
class VennChart(Chart):
942
943
def type_to_url(self):
944
return 'cht=v'
945
946
def annotated_data(self):
947
for dataset in self.data:
948
yield ('y', dataset)
949
950
951
class RadarChart(Chart):
952
953
def type_to_url(self):
954
return 'cht=r'
955
956
957
class SplineRadarChart(RadarChart):
958
959
def type_to_url(self):
960
return 'cht=rs'
961
962
963
class MapChart(Chart):
964
965
def __init__(self, *args, **kwargs):
966
Chart.__init__(self, *args, **kwargs)
967
self.geo_area = 'world'
968
self.codes = []
969
self.__areas = ('africa', 'asia', 'europe', 'middle_east',
970
'south_america', 'usa', 'world')
971
self.__ccodes = (
972
'AD', 'AE', 'AF', 'AG', 'AI', 'AL', 'AM', 'AN', 'AO', 'AQ', 'AR',
973
'AS', 'AT', 'AU', 'AW', 'AX', 'AZ', 'BA', 'BB', 'BD', 'BE', 'BF',
974
'BG', 'BH', 'BI', 'BJ', 'BL', 'BM', 'BN', 'BO', 'BR', 'BS', 'BT',
975
'BV', 'BW', 'BY', 'BZ', 'CA', 'CC', 'CD', 'CF', 'CG', 'CH', 'CI',
976
'CK', 'CL', 'CM', 'CN', 'CO', 'CR', 'CU', 'CV', 'CX', 'CY', 'CZ',
977
'DE', 'DJ', 'DK', 'DM', 'DO', 'DZ', 'EC', 'EE', 'EG', 'EH', 'ER',
978
'ES', 'ET', 'FI', 'FJ', 'FK', 'FM', 'FO', 'FR', 'GA', 'GB', 'GD',
979
'GE', 'GF', 'GG', 'GH', 'GI', 'GL', 'GM', 'GN', 'GP', 'GQ', 'GR',
980
'GS', 'GT', 'GU', 'GW', 'GY', 'HK', 'HM', 'HN', 'HR', 'HT', 'HU',
981
'ID', 'IE', 'IL', 'IM', 'IN', 'IO', 'IQ', 'IR', 'IS', 'IT', 'JE',
982
'JM', 'JO', 'JP', 'KE', 'KG', 'KH', 'KI', 'KM', 'KN', 'KP', 'KR',
983
'KW', 'KY', 'KZ', 'LA', 'LB', 'LC', 'LI', 'LK', 'LR', 'LS', 'LT',
984
'LU', 'LV', 'LY', 'MA', 'MC', 'MD', 'ME', 'MF', 'MG', 'MH', 'MK',
985
'ML', 'MM', 'MN', 'MO', 'MP', 'MQ', 'MR', 'MS', 'MT', 'MU', 'MV',
986
'MW', 'MX', 'MY', 'MZ', 'NA', 'NC', 'NE', 'NF', 'NG', 'NI', 'NL',
987
'NO', 'NP', 'NR', 'NU', 'NZ', 'OM', 'PA', 'PE', 'PF', 'PG', 'PH',
988
'PK', 'PL', 'PM', 'PN', 'PR', 'PS', 'PT', 'PW', 'PY', 'QA', 'RE',
989
'RO', 'RS', 'RU', 'RW', 'SA', 'SB', 'SC', 'SD', 'SE', 'SG', 'SH',
990
'SI', 'SJ', 'SK', 'SL', 'SM', 'SN', 'SO', 'SR', 'ST', 'SV', 'SY',
991
'SZ', 'TC', 'TD', 'TF', 'TG', 'TH', 'TJ', 'TK', 'TL', 'TM', 'TN',
992
'TO', 'TR', 'TT', 'TV', 'TW', 'TZ', 'UA', 'UG', 'UM', 'US', 'UY',
993
'UZ', 'VA', 'VC', 'VE', 'VG', 'VI', 'VN', 'VU', 'WF', 'WS', 'YE',
994
'YT', 'ZA', 'ZM', 'ZW')
995
996
def type_to_url(self):
997
return 'cht=t'
998
999
def set_codes(self, codes):
1000
'''Set the country code map for the data.
1001
Codes given in a list.
1002
1003
i.e. DE - Germany
1004
AT - Austria
1005
US - United States
1006
'''
1007
1008
codemap = ''
1009
1010
for cc in codes:
1011
cc = cc.upper()
1012
if cc in self.__ccodes:
1013
codemap += cc
1014
else:
1015
raise UnknownCountryCodeException(cc)
1016
1017
self.codes = codemap
1018
1019
def set_geo_area(self, area):
1020
'''Sets the geo area for the map.
1021
1022
* africa
1023
* asia
1024
* europe
1025
* middle_east
1026
* south_america
1027
* usa
1028
* world
1029
'''
1030
1031
if area in self.__areas:
1032
self.geo_area = area
1033
else:
1034
raise UnknownChartType('Unknown chart type for maps: %s' %area)
1035
1036
def get_url_bits(self, data_class=None):
1037
url_bits = Chart.get_url_bits(self, data_class=data_class)
1038
url_bits.append('chtm=%s' % self.geo_area)
1039
if self.codes:
1040
url_bits.append('chld=%s' % ''.join(self.codes))
1041
return url_bits
1042
1043
def add_data_dict(self, datadict):
1044
'''Sets the data and country codes via a dictionary.
1045
1046
i.e. {'DE': 50, 'GB': 30, 'AT': 70}
1047
'''
1048
1049
self.set_codes(datadict.keys())
1050
self.add_data(datadict.values())
1051
1052
1053
class GoogleOMeterChart(PieChart):
1054
"""Inheriting from PieChart because of similar labeling"""
1055
1056
def __init__(self, *args, **kwargs):
1057
PieChart.__init__(self, *args, **kwargs)
1058
if self.auto_scale and not self.x_range:
1059
warnings.warn('Please specify an x_range with GoogleOMeterChart, '
1060
'otherwise one arrow will always be at the max.')
1061
1062
def type_to_url(self):
1063
return 'cht=gom'
1064
1065
1066
class QRChart(Chart):
1067
1068
def __init__(self, *args, **kwargs):
1069
Chart.__init__(self, *args, **kwargs)
1070
self.encoding = None
1071
self.ec_level = None
1072
self.margin = None
1073
1074
def type_to_url(self):
1075
return 'cht=qr'
1076
1077
def data_to_url(self, data_class=None):
1078
if not self.data:
1079
raise NoDataGivenException()
1080
return 'chl=%s' % urllib.parse.quote(self.data[0])
1081
1082
def get_url_bits(self, data_class=None):
1083
url_bits = Chart.get_url_bits(self, data_class=data_class)
1084
if self.encoding:
1085
url_bits.append('choe=%s' % self.encoding)
1086
if self.ec_level:
1087
url_bits.append('chld=%s%%7c%s' % (self.ec_level, self.margin))
1088
return url_bits
1089
1090
def set_encoding(self, encoding):
1091
self.encoding = encoding
1092
1093
def set_ec(self, level, margin):
1094
self.ec_level = level
1095
self.margin = margin
1096
1097
1098
class ChartGrammar(object):
1099
1100
def __init__(self):
1101
self.grammar = None
1102
self.chart = None
1103
1104
def parse(self, grammar):
1105
self.grammar = grammar
1106
self.chart = self.create_chart_instance()
1107
1108
for attr in self.grammar:
1109
if attr in ('w', 'h', 'type', 'auto_scale', 'x_range', 'y_range'):
1110
continue # These are already parsed in create_chart_instance
1111
attr_func = 'parse_' + attr
1112
if not hasattr(self, attr_func):
1113
warnings.warn('No parser for grammar attribute "%s"' % (attr))
1114
continue
1115
getattr(self, attr_func)(grammar[attr])
1116
1117
return self.chart
1118
1119
def parse_data(self, data):
1120
self.chart.data = data
1121
1122
@staticmethod
1123
def get_possible_chart_types():
1124
possible_charts = []
1125
for cls_name in globals().keys():
1126
if not cls_name.endswith('Chart'):
1127
continue
1128
cls = globals()[cls_name]
1129
# Check if it is an abstract class
1130
try:
1131
a = cls(1, 1, auto_scale=False)
1132
del a
1133
except AbstractClassException:
1134
continue
1135
# Strip off "Class"
1136
possible_charts.append(cls_name[:-5])
1137
return possible_charts
1138
1139
def create_chart_instance(self, grammar=None):
1140
if not grammar:
1141
grammar = self.grammar
1142
assert(isinstance(grammar, dict)) # grammar must be a dict
1143
assert('w' in grammar) # width is required
1144
assert('h' in grammar) # height is required
1145
assert('type' in grammar) # type is required
1146
chart_type = grammar['type']
1147
w = grammar['w']
1148
h = grammar['h']
1149
auto_scale = grammar.get('auto_scale', None)
1150
x_range = grammar.get('x_range', None)
1151
y_range = grammar.get('y_range', None)
1152
types = ChartGrammar.get_possible_chart_types()
1153
if chart_type not in types:
1154
raise UnknownChartType('%s is an unknown chart type. Possible '
1155
'chart types are %s' % (chart_type, ','.join(types)))
1156
return globals()[chart_type + 'Chart'](w, h, auto_scale=auto_scale,
1157
x_range=x_range, y_range=y_range)
1158
1159
def download(self):
1160
pass
1161
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.
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
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
reo_colour = re.compile('^([A-Fa-f0-9]{2,2}){3,4}$')
34
35
36
def _check_colour(colour):
37
if not reo_colour.match(colour):
38
raise InvalidParametersException('Colours need to be in ' \
39
'RRGGBB or RRGGBBAA format. One of your colours has %s' % \
40
colour)
41
42
# Exception Classes
43
# -----------------------------------------------------------------------------
44
45
46
class PyGoogleChartException(Exception):
47
pass
48
49
50
class DataOutOfRangeException(PyGoogleChartException):
51
pass
52
53
54
class UnknownDataTypeException(PyGoogleChartException):
55
pass
56
57
58
class NoDataGivenException(PyGoogleChartException):
59
pass
60
61
62
class InvalidParametersException(PyGoogleChartException):
63
pass
64
65
66
class BadContentTypeException(PyGoogleChartException):
67
pass
68
69
70
# Data Classes
71
# -----------------------------------------------------------------------------
72
73
74
class Data(object):
75
76
def __init__(self, data):
77
assert(type(self) != Data) # This is an abstract class
78
self.data = data
79
80
81
class SimpleData(Data):
82
enc_map = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
83
84
def __repr__(self):
85
encoded_data = []
86
for data in self.data:
87
sub_data = []
88
for value in data:
89
if value is None:
90
sub_data.append('_')
91
elif value >= 0 and value <= SimpleData.max_value:
92
sub_data.append(SimpleData.enc_map[value])
93
else:
94
raise DataOutOfRangeException()
95
encoded_data.append(''.join(sub_data))
96
return 'chd=s:' + ','.join(encoded_data)
97
98
@staticmethod
99
def max_value():
100
return 61
101
102
103
class TextData(Data):
104
105
def __repr__(self):
106
encoded_data = []
107
for data in self.data:
108
sub_data = []
109
for value in data:
110
if value is None:
111
sub_data.append(-1)
112
elif value >= 0 and value <= TextData.max_value:
113
sub_data.append(str(float(value)))
114
else:
115
raise DataOutOfRangeException()
116
encoded_data.append(','.join(sub_data))
117
return 'chd=t:' + '|'.join(encoded_data)
118
119
@staticmethod
120
def max_value():
121
return 100
122
123
124
class ExtendedData(Data):
125
enc_map = \
126
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-.'
127
128
def __repr__(self):
129
encoded_data = []
130
enc_size = len(ExtendedData.enc_map)
131
for data in self.data:
132
sub_data = []
133
for value in data:
134
if value is None:
135
sub_data.append('__')
136
elif value >= 0 and value <= ExtendedData.max_value:
137
first, second = divmod(int(value), enc_size)
138
sub_data.append('%s%s' % (
139
ExtendedData.enc_map[first],
140
ExtendedData.enc_map[second]))
141
else:
142
raise DataOutOfRangeException( \
143
'Item #%i "%s" is out of range' % (data.index(value), \
144
value))
145
encoded_data.append(''.join(sub_data))
146
return 'chd=e:' + ','.join(encoded_data)
147
148
@staticmethod
149
def max_value():
150
return 4095
151
152
# Axis Classes
153
# -----------------------------------------------------------------------------
154
155
156
class Axis(object):
157
BOTTOM = 'x'
158
TOP = 't'
159
LEFT = 'y'
160
RIGHT = 'r'
161
TYPES = (BOTTOM, TOP, LEFT, RIGHT)
162
163
def __init__(self, axis_index, axis_type, **kw):
164
assert(axis_type in Axis.TYPES)
165
self.has_style = False
166
self.axis_index = axis_index
167
self.axis_type = axis_type
168
self.positions = None
169
170
def set_index(self, axis_index):
171
self.axis_index = axis_index
172
173
def set_positions(self, positions):
174
self.positions = positions
175
176
def set_style(self, colour, font_size=None, alignment=None):
177
_check_colour(colour)
178
self.colour = colour
179
self.font_size = font_size
180
self.alignment = alignment
181
self.has_style = True
182
183
def style_to_url(self):
184
bits = []
185
bits.append(str(self.axis_index))
186
bits.append(self.colour)
187
if self.font_size is not None:
188
bits.append(str(self.font_size))
189
if self.alignment is not None:
190
bits.append(str(self.alignment))
191
return ','.join(bits)
192
193
def positions_to_url(self):
194
bits = []
195
bits.append(str(self.axis_index))
196
bits += [str(a) for a in self.positions]
197
return ','.join(bits)
198
199
200
class LabelAxis(Axis):
201
202
def __init__(self, axis_index, axis_type, values, **kwargs):
203
Axis.__init__(self, axis_index, axis_type, **kwargs)
204
self.values = [str(a) for a in values]
205
206
def __repr__(self):
207
return '%i:|%s' % (self.axis_index, '|'.join(self.values))
208
209
210
class RangeAxis(Axis):
211
212
def __init__(self, axis_index, axis_type, low, high, **kwargs):
213
Axis.__init__(self, axis_index, axis_type, **kwargs)
214
self.low = low
215
self.high = high
216
217
def __repr__(self):
218
return '%i,%s,%s' % (self.axis_index, self.low, self.high)
219
220
# Chart Classes
221
# -----------------------------------------------------------------------------
222
223
224
class Chart(object):
225
"""Abstract class for all chart types.
226
227
width are height specify the dimensions of the image. title sets the title
228
of the chart. legend requires a list that corresponds to datasets.
229
"""
230
231
BASE_URL = 'http://chart.apis.google.com/chart?'
232
BACKGROUND = 'bg'
233
CHART = 'c'
234
SOLID = 's'
235
LINEAR_GRADIENT = 'lg'
236
LINEAR_STRIPES = 'ls'
237
238
def __init__(self, width, height, title=None, legend=None, colours=None):
239
assert(type(self) != Chart) # This is an abstract class
240
assert(isinstance(width, int))
241
assert(isinstance(height, int))
242
self.width = width
243
self.height = height
244
self.data = []
245
self.set_title(title)
246
self.set_legend(legend)
247
self.set_colours(colours)
248
self.fill_types = {
249
Chart.BACKGROUND: None,
250
Chart.CHART: None,
251
}
252
self.fill_area = {
253
Chart.BACKGROUND: None,
254
Chart.CHART: None,
255
}
256
# self.axis = {
257
# Axis.TOP: None,
258
# Axis.BOTTOM: None,
259
# Axis.LEFT: None,
260
# Axis.RIGHT: None,
261
# }
262
self.axis = []
263
self.markers = []
264
265
# URL generation
266
# -------------------------------------------------------------------------
267
268
def get_url(self):
269
url_bits = self.get_url_bits()
270
return self.BASE_URL + '&'.join(url_bits)
271
272
def get_url_bits(self):
273
url_bits = []
274
# required arguments
275
url_bits.append(self.type_to_url())
276
url_bits.append('chs=%ix%i' % (self.width, self.height))
277
url_bits.append(self.data_to_url())
278
# optional arguments
279
if self.title:
280
url_bits.append('chtt=%s' % self.title)
281
if self.legend:
282
url_bits.append('chdl=%s' % '|'.join(self.legend))
283
if self.colours:
284
url_bits.append('chco=%s' % ','.join(self.colours))
285
ret = self.fill_to_url()
286
if ret:
287
url_bits.append(ret)
288
ret = self.axis_to_url()
289
if ret:
290
url_bits.append(ret)
291
if self.markers:
292
url_bits.append(self.markers_to_url())
293
return url_bits
294
295
# Downloading
296
# -------------------------------------------------------------------------
297
298
def download(self, file_name):
299
opener = urllib2.urlopen(self.get_url())
300
301
if opener.headers['content-type'] != 'image/png':
302
raise BadContentTypeException('Server responded with a ' \
303
'content-type of %s' % opener.headers['content-type'])
304
305
open(file_name, 'wb').write(urllib.urlopen(self.get_url()).read())
306
307
# Simple settings
308
# -------------------------------------------------------------------------
309
310
def set_title(self, title):
311
if title:
312
self.title = urllib.quote(title)
313
else:
314
self.title = None
315
316
def set_legend(self, legend):
317
# legend needs to be a list, tuple or None
318
assert(isinstance(legend, list) or isinstance(legend, tuple) or
319
legend is None)
320
if legend:
321
self.legend = [urllib.quote(a) for a in legend]
322
else:
323
self.legend = None
324
325
# Chart colours
326
# -------------------------------------------------------------------------
327
328
def set_colours(self, colours):
329
# colours needs to be a list, tuple or None
330
assert(isinstance(colours, list) or isinstance(colours, tuple) or
331
colours is None)
332
# make sure the colours are in the right format
333
if colours:
334
for col in colours:
335
_check_colour(col)
336
self.colours = colours
337
338
# Background/Chart colours
339
# -------------------------------------------------------------------------
340
341
def fill_solid(self, area, colour):
342
assert(area in (Chart.BACKGROUND, Chart.CHART))
343
_check_colour(colour)
344
self.fill_area[area] = colour
345
self.fill_types[area] = Chart.SOLID
346
347
def _check_fill_linear(self, angle, *args):
348
assert(isinstance(args, list) or isinstance(args, tuple))
349
assert(angle >= 0 and angle <= 90)
350
assert(len(args) % 2 == 0)
351
args = list(args) # args is probably a tuple and we need to mutate
352
for a in xrange(len(args) / 2):
353
col = args[a * 2]
354
offset = args[a * 2 + 1]
355
_check_colour(col)
356
assert(offset >= 0 and offset <= 1)
357
args[a * 2 + 1] = str(args[a * 2 + 1])
358
return args
359
360
def fill_linear_gradient(self, area, angle, *args):
361
assert(area in (Chart.BACKGROUND, Chart.CHART))
362
args = self._check_fill_linear(angle, *args)
363
self.fill_types[area] = Chart.LINEAR_GRADIENT
364
self.fill_area[area] = ','.join([str(angle)] + args)
365
366
def fill_linear_stripes(self, area, angle, *args):
367
assert(area in (Chart.BACKGROUND, Chart.CHART))
368
args = self._check_fill_linear(angle, *args)
369
self.fill_types[area] = Chart.LINEAR_STRIPES
370
self.fill_area[area] = ','.join([str(angle)] + args)
371
372
def fill_to_url(self):
373
areas = []
374
for area in (Chart.BACKGROUND, Chart.CHART):
375
if self.fill_types[area]:
376
areas.append('%s,%s,%s' % (area, self.fill_types[area], \
377
self.fill_area[area]))
378
if areas:
379
return 'chf=' + '|'.join(areas)
380
381
# Data
382
# -------------------------------------------------------------------------
383
384
def data_class_detection(self, data):
385
"""
386
Detects and returns the data type required based on the range of the
387
data given. The data given must be lists of numbers within a list.
388
"""
389
assert(isinstance(data, list) or isinstance(data, tuple))
390
max_value = None
391
for a in data:
392
assert(isinstance(a, list) or isinstance(a, tuple))
393
if max_value is None or max(a) > max_value:
394
max_value = max(a)
395
for data_class in (SimpleData, TextData, ExtendedData):
396
if max_value <= data_class.max_value():
397
return data_class
398
raise DataOutOfRangeException()
399
400
def add_data(self, data):
401
self.data.append(data)
402
return len(self.data) - 1 # return the "index" of the data set
403
404
def data_to_url(self, data_class=None):
405
if not data_class:
406
data_class = self.data_class_detection(self.data)
407
if not issubclass(data_class, Data):
408
raise UnknownDataTypeException()
409
return repr(data_class(self.data))
410
411
# Axis Labels
412
# -------------------------------------------------------------------------
413
414
def set_axis_labels(self, axis_type, values):
415
assert(axis_type in Axis.TYPES)
416
axis_index = len(self.axis)
417
axis = LabelAxis(axis_index, axis_type, values)
418
self.axis.append(axis)
419
return axis_index
420
421
def set_axis_range(self, axis_type, low, high):
422
assert(axis_type in Axis.TYPES)
423
axis_index = len(self.axis)
424
axis = RangeAxis(axis_index, axis_type, low, high)
425
self.axis.append(axis)
426
return axis_index
427
428
def set_axis_positions(self, axis_index, positions):
429
try:
430
self.axis[axis_index].set_positions(positions)
431
except IndexError:
432
raise InvalidParametersException('Axis index %i has not been ' \
433
'created' % axis)
434
435
def set_axis_style(self, axis_index, colour, font_size=None, alignment=None):
436
try:
437
self.axis[axis_index].set_style(colour, font_size, alignment)
438
except IndexError:
439
raise InvalidParametersException('Axis index %i has not been ' \
440
'created' % axis)
441
442
def axis_to_url(self):
443
available_axis = []
444
label_axis = []
445
range_axis = []
446
positions = []
447
styles = []
448
index = -1
449
for axis in self.axis:
450
available_axis.append(axis.axis_type)
451
if isinstance(axis, RangeAxis):
452
range_axis.append(repr(axis))
453
if isinstance(axis, LabelAxis):
454
label_axis.append(repr(axis))
455
if axis.positions:
456
positions.append(axis.positions_to_url())
457
if axis.has_style:
458
styles.append(axis.style_to_url())
459
if not available_axis:
460
return
461
url_bits = []
462
url_bits.append('chxt=%s' % ','.join(available_axis))
463
if label_axis:
464
url_bits.append('chxl=%s' % '|'.join(label_axis))
465
if range_axis:
466
url_bits.append('chxr=%s' % '|'.join(range_axis))
467
if positions:
468
url_bits.append('chxp=%s' % '|'.join(positions))
469
if styles:
470
url_bits.append('chxs=%s' % '|'.join(styles))
471
return '&'.join(url_bits)
472
473
# Markers, Ranges and Fill area (chm)
474
# -------------------------------------------------------------------------
475
476
def markers_to_url(self):
477
return 'chm=%s' % '|'.join([','.join(a) for a in self.markers])
478
479
def add_marker(self, index, point, marker_type, colour, size):
480
self.markers.append((marker_type, colour, str(index), str(point), \
481
str(size)))
482
483
def add_horizontal_range(self, colour, start, stop):
484
self.markers.append(('r', colour, '1', str(start), str(stop)))
485
486
def add_vertical_range(self, colour, start, stop):
487
self.markers.append(('R', colour, '1', str(start), str(stop)))
488
489
def add_fill_range(self, colour, index_start, index_end):
490
self.markers.append(('b', colour, str(index_start), str(index_end), \
491
'1'))
492
493
def add_fill_simple(self, colour):
494
self.markers.append(('B', colour, '1', '1', '1'))
495
496
497
class ScatterChart(Chart):
498
499
def __init__(self, *args, **kwargs):
500
Chart.__init__(self, *args, **kwargs)
501
502
def type_to_url(self):
503
return 'cht=s'
504
505
506
class LineChart(Chart):
507
508
def __init__(self, *args, **kwargs):
509
assert(type(self) != LineChart) # This is an abstract class
510
Chart.__init__(self, *args, **kwargs)
511
self.line_styles = {}
512
self.grid = None
513
514
def set_line_style(self, index, thickness=1, line_segment=None, \
515
blank_segment=None):
516
value = []
517
value.append(str(thickness))
518
if line_segment:
519
value.append(str(line_segment))
520
value.append(str(blank_segment))
521
self.line_styles[index] = value
522
523
def set_grid(self, x_step, y_step, line_segment=1, \
524
blank_segment=0):
525
self.grid = '%s,%s,%s,%s' % (x_step, y_step, line_segment, \
526
blank_segment)
527
528
def get_url_bits(self):
529
url_bits = Chart.get_url_bits(self)
530
if self.line_styles:
531
style = []
532
# for index, values in self.line_style.items():
533
for index in xrange(max(self.line_styles) + 1):
534
if index in self.line_styles:
535
values = self.line_styles[index]
536
else:
537
values = ('1', )
538
style.append(','.join(values))
539
url_bits.append('chls=%s' % '|'.join(style))
540
if self.grid:
541
url_bits.append('chg=%s' % self.grid)
542
return url_bits
543
544
545
class SimpleLineChart(LineChart):
546
547
def type_to_url(self):
548
return 'cht=lc'
549
550
551
class XYLineChart(LineChart):
552
553
def type_to_url(self):
554
return 'cht=lxy'
555
556
557
class BarChart(Chart):
558
559
def __init__(self, *args, **kwargs):
560
assert(type(self) != BarChart) # This is an abstract class
561
Chart.__init__(self, *args, **kwargs)
562
self.bar_width = None
563
564
def set_bar_width(self, bar_width):
565
self.bar_width = bar_width
566
567
def get_url_bits(self):
568
url_bits = Chart.get_url_bits(self)
569
url_bits.append('chbh=%i' % self.bar_width)
570
return url_bits
571
572
573
class StackedHorizontalBarChart(BarChart):
574
575
def type_to_url(self):
576
return 'cht=bhs'
577
578
579
class StackedVerticalBarChart(BarChart):
580
581
def type_to_url(self):
582
return 'cht=bvs'
583
584
585
class GroupedBarChart(BarChart):
586
587
def __init__(self, *args, **kwargs):
588
assert(type(self) != GroupedBarChart) # This is an abstract class
589
BarChart.__init__(self, *args, **kwargs)
590
self.bar_spacing = None
591
592
def set_bar_spacing(self, spacing):
593
self.bar_spacing = spacing
594
595
def get_url_bits(self):
596
# Skip 'BarChart.get_url_bits' and call Chart directly so the parent
597
# doesn't add "chbh" before we do.
598
url_bits = Chart.get_url_bits(self)
599
if self.bar_spacing is not None:
600
if self.bar_width is None:
601
raise InvalidParametersException('Bar width is required to ' \
602
'be set when setting spacing')
603
url_bits.append('chbh=%i,%i' % (self.bar_width, self.bar_spacing))
604
else:
605
url_bits.append('chbh=%i' % self.bar_width)
606
return url_bits
607
608
609
class GroupedHorizontalBarChart(GroupedBarChart):
610
611
def type_to_url(self):
612
return 'cht=bhg'
613
614
615
class GroupedVerticalBarChart(GroupedBarChart):
616
617
def type_to_url(self):
618
return 'cht=bvg'
619
620
621
class PieChart(Chart):
622
623
def __init__(self, *args, **kwargs):
624
assert(type(self) != PieChart) # This is an abstract class
625
Chart.__init__(self, *args, **kwargs)
626
self.pie_labels = []
627
628
def set_pie_labels(self, labels):
629
self.pie_labels = labels
630
631
def get_url_bits(self):
632
url_bits = Chart.get_url_bits(self)
633
if self.pie_labels:
634
url_bits.append('chl=%s' % '|'.join(self.pie_labels))
635
return url_bits
636
637
638
class PieChart2D(PieChart):
639
640
def type_to_url(self):
641
return 'cht=p'
642
643
644
class PieChart3D(PieChart):
645
646
def type_to_url(self):
647
return 'cht=p3'
648
649
650
class VennChart(Chart):
651
652
def type_to_url(self):
653
return 'cht=v'
654
655
656
def test():
657
chart = GroupedVerticalBarChart(320, 200)
658
chart = PieChart2D(320, 200)
659
chart = ScatterChart(320, 200)
660
chart = SimpleLineChart(320, 200)
661
sine_data = [math.sin(float(a) / 10) * 2000 + 2000 for a in xrange(100)]
662
random_data = [a * random.random() * 30 for a in xrange(40)]
663
random_data2 = [random.random() * 4000 for a in xrange(10)]
664
# chart.set_bar_width(50)
665
# chart.set_bar_spacing(0)
666
chart.add_data(sine_data)
667
chart.add_data(random_data)
668
chart.add_data(random_data2)
669
# chart.set_line_style(1, thickness=2)
670
# chart.set_line_style(2, line_segment=10, blank_segment=5)
671
# chart.set_title('heloooo')
672
# chart.set_legend(('sine wave', 'random * x'))
673
# chart.set_colours(('ee2000', 'DDDDAA', 'fF03f2'))
674
# chart.fill_solid(Chart.BACKGROUND, '123456')
675
# chart.fill_linear_gradient(Chart.CHART, 20, '004070', 1, '300040', 0,
676
# 'aabbcc00', 0.5)
677
# chart.fill_linear_stripes(Chart.CHART, 20, '204070', .2, '300040', .2,
678
# 'aabbcc00', 0.2)
679
axis_left_index = chart.set_axis_range(Axis.LEFT, 0, 10)
680
axis_left_index = chart.set_axis_range(Axis.LEFT, 0, 10)
681
axis_left_index = chart.set_axis_range(Axis.LEFT, 0, 10)
682
axis_right_index = chart.set_axis_range(Axis.RIGHT, 5, 30)
683
axis_bottom_index = chart.set_axis_labels(Axis.BOTTOM, [1, 25, 95])
684
chart.set_axis_positions(axis_bottom_index, [1, 25, 95])
685
chart.set_axis_style(axis_bottom_index, '003050', 15)
686
687
# chart.set_pie_labels(('apples', 'oranges', 'bananas'))
688
689
# chart.set_grid(10, 10)
690
691
# for a in xrange(0, 100, 10):
692
# chart.add_marker(1, a, 'a', 'AACA20', 10)
693
694
chart.add_horizontal_range('00A020', .2, .5)
695
chart.add_vertical_range('00c030', .2, .4)
696
697
chart.add_fill_simple('303030A0')
698
699
chart.download('test.png')
700
701
url = chart.get_url()
702
print url
703
if 0:
704
data = urllib.urlopen(chart.get_url()).read()
705
open('meh.png', 'wb').write(data)
706
os.system('start meh.png')
707
708
709
if __name__ == '__main__':
710
test()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0