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- Committer: gak
- Date: 2007-12-15 23:21:31 UTC
- Revision ID: git-v1:857495549bac47c6a70872d4b36dd1fe49270357
version bump and MANIFEST fixes to allow examples and COPYING in the sdist
- files removed:
- examples/all.py
- scripts
- files modified:
- examples/line.py
added
removed
pygooglechart.py
1
"""
2
PyGoogleChart - A complete Python wrapper for the Google Chart API
3
4
http://pygooglechart.slowchop.com/
5
6
Copyright 2007 Gerald Kaszuba
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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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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
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__version__ = '0.2.0'
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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):
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pass
58
59
60
class NoDataGivenException(PyGoogleChartException):
61
pass
62
63
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class InvalidParametersException(PyGoogleChartException):
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pass
66
67
68
class BadContentTypeException(PyGoogleChartException):
69
pass
70
71
72
# Data Classes
73
# -----------------------------------------------------------------------------
74
75
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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
@classmethod
83
def float_scale_value(cls, value, range):
84
lower, upper = range
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max_value = cls.max_value()
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scaled = (value-lower) * (float(max_value)/(upper-lower))
87
return scaled
88
89
@classmethod
90
def clip_value(cls, value):
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clipped = max(0, min(value, cls.max_value()))
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return clipped
93
94
@classmethod
95
def int_scale_value(cls, value, range):
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scaled = int(round(cls.float_scale_value(value, range)))
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return scaled
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99
@classmethod
100
def scale_value(cls, value, range):
101
scaled = cls.int_scale_value(value, range)
102
clipped = cls.clip_value(scaled)
103
return clipped
104
105
class SimpleData(Data):
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enc_map = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
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108
def __repr__(self):
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max_value = self.max_value()
110
encoded_data = []
111
for data in self.data:
112
sub_data = []
113
for value in data:
114
if value is None:
115
sub_data.append('_')
116
elif value >= 0 and value <= max_value:
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sub_data.append(SimpleData.enc_map[value])
118
else:
119
raise DataOutOfRangeException('cannot encode value: %d'
120
% value)
121
encoded_data.append(''.join(sub_data))
122
return 'chd=s:' + ','.join(encoded_data)
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124
@staticmethod
125
def max_value():
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return 61
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128
class TextData(Data):
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130
def __repr__(self):
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max_value = self.max_value()
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encoded_data = []
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for data in self.data:
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sub_data = []
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for value in data:
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if value is None:
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sub_data.append(-1)
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elif value >= 0 and value <= max_value:
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sub_data.append("%.1f" % float(value))
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else:
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raise DataOutOfRangeException()
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encoded_data.append(','.join(sub_data))
143
return 'chd=t:' + '|'.join(encoded_data)
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145
@staticmethod
146
def max_value():
147
return 100
148
149
@classmethod
150
def scale_value(cls, value, range):
151
lower, upper = range
152
if upper > lower:
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max_value = cls.max_value()
154
scaled = (float(value) - lower) * max_value / upper
155
clipped = max(0, min(scaled, max_value))
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return clipped
157
else:
158
return lower
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160
@classmethod
161
def scale_value(cls, value, range):
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# use float values instead of integers because we don't need an encode
163
# map index
164
scaled = cls.float_scale_value(value,range)
165
clipped = cls.clip_value(scaled)
166
return clipped
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168
class ExtendedData(Data):
169
enc_map = \
170
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-.'
171
172
def __repr__(self):
173
max_value = self.max_value()
174
encoded_data = []
175
enc_size = len(ExtendedData.enc_map)
176
for data in self.data:
177
sub_data = []
178
for value in data:
179
if value is None:
180
sub_data.append('__')
181
elif value >= 0 and value <= max_value:
182
first, second = divmod(int(value), enc_size)
183
sub_data.append('%s%s' % (
184
ExtendedData.enc_map[first],
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ExtendedData.enc_map[second]))
186
else:
187
raise DataOutOfRangeException( \
188
'Item #%i "%s" is out of range' % (data.index(value), \
189
value))
190
encoded_data.append(''.join(sub_data))
191
return 'chd=e:' + ','.join(encoded_data)
192
193
@staticmethod
194
def max_value():
195
return 4095
196
197
198
# Axis Classes
199
# -----------------------------------------------------------------------------
200
201
202
class Axis(object):
203
BOTTOM = 'x'
204
TOP = 't'
205
LEFT = 'y'
206
RIGHT = 'r'
207
TYPES = (BOTTOM, TOP, LEFT, RIGHT)
208
209
def __init__(self, axis_index, axis_type, **kw):
210
assert(axis_type in Axis.TYPES)
211
self.has_style = False
212
self.axis_index = axis_index
213
self.axis_type = axis_type
214
self.positions = None
215
216
def set_index(self, axis_index):
217
self.axis_index = axis_index
218
219
def set_positions(self, positions):
220
self.positions = positions
221
222
def set_style(self, colour, font_size=None, alignment=None):
223
_check_colour(colour)
224
self.colour = colour
225
self.font_size = font_size
226
self.alignment = alignment
227
self.has_style = True
228
229
def style_to_url(self):
230
bits = []
231
bits.append(str(self.axis_index))
232
bits.append(self.colour)
233
if self.font_size is not None:
234
bits.append(str(self.font_size))
235
if self.alignment is not None:
236
bits.append(str(self.alignment))
237
return ','.join(bits)
238
239
def positions_to_url(self):
240
bits = []
241
bits.append(str(self.axis_index))
242
bits += [str(a) for a in self.positions]
243
return ','.join(bits)
244
245
246
class LabelAxis(Axis):
247
248
def __init__(self, axis_index, axis_type, values, **kwargs):
249
Axis.__init__(self, axis_index, axis_type, **kwargs)
250
self.values = [str(a) for a in values]
251
252
def __repr__(self):
253
return '%i:|%s' % (self.axis_index, '|'.join(self.values))
254
255
256
class RangeAxis(Axis):
257
258
def __init__(self, axis_index, axis_type, low, high, **kwargs):
259
Axis.__init__(self, axis_index, axis_type, **kwargs)
260
self.low = low
261
self.high = high
262
263
def __repr__(self):
264
return '%i,%s,%s' % (self.axis_index, self.low, self.high)
265
266
# Chart Classes
267
# -----------------------------------------------------------------------------
268
269
270
class Chart(object):
271
"""Abstract class for all chart types.
272
273
width are height specify the dimensions of the image. title sets the title
274
of the chart. legend requires a list that corresponds to datasets.
275
"""
276
277
BASE_URL = 'http://chart.apis.google.com/chart?'
278
BACKGROUND = 'bg'
279
CHART = 'c'
280
ALPHA = 'a'
281
VALID_SOLID_FILL_TYPES = (BACKGROUND, CHART, ALPHA)
282
SOLID = 's'
283
LINEAR_GRADIENT = 'lg'
284
LINEAR_STRIPES = 'ls'
285
286
def __init__(self, width, height, title=None, legend=None, colours=None,
287
auto_scale=True, x_range=None, y_range=None):
288
assert(type(self) != Chart) # This is an abstract class
289
assert(isinstance(width, int))
290
assert(isinstance(height, int))
291
self.width = width
292
self.height = height
293
self.data = []
294
self.set_title(title)
295
self.set_legend(legend)
296
self.set_colours(colours)
297
298
# Data for scaling.
299
self.auto_scale = auto_scale # Whether to automatically scale data
300
self.x_range = x_range # (min, max) x-axis range for scaling
301
self.y_range = y_range # (min, max) y-axis range for scaling
302
self.scaled_data_class = None
303
self.scaled_x_range = None
304
self.scaled_y_range = None
305
306
self.fill_types = {
307
Chart.BACKGROUND: None,
308
Chart.CHART: None,
309
Chart.ALPHA: None,
310
}
311
self.fill_area = {
312
Chart.BACKGROUND: None,
313
Chart.CHART: None,
314
Chart.ALPHA: None,
315
}
316
self.axis = []
317
self.markers = []
318
self.line_styles = {}
319
self.grid = None
320
321
# URL generation
322
# -------------------------------------------------------------------------
323
324
def get_url(self, data_class=None):
325
url_bits = self.get_url_bits(data_class=data_class)
326
return self.BASE_URL + '&'.join(url_bits)
327
328
def get_url_bits(self, data_class=None):
329
url_bits = []
330
# required arguments
331
url_bits.append(self.type_to_url())
332
url_bits.append('chs=%ix%i' % (self.width, self.height))
333
url_bits.append(self.data_to_url(data_class=data_class))
334
# optional arguments
335
if self.title:
336
url_bits.append('chtt=%s' % self.title)
337
if self.legend:
338
url_bits.append('chdl=%s' % '|'.join(self.legend))
339
if self.colours:
340
url_bits.append('chco=%s' % ','.join(self.colours))
341
ret = self.fill_to_url()
342
if ret:
343
url_bits.append(ret)
344
ret = self.axis_to_url()
345
if ret:
346
url_bits.append(ret)
347
if self.markers:
348
url_bits.append(self.markers_to_url())
349
if self.line_styles:
350
style = []
351
for index in xrange(max(self.line_styles) + 1):
352
if index in self.line_styles:
353
values = self.line_styles[index]
354
else:
355
values = ('1', )
356
style.append(','.join(values))
357
url_bits.append('chls=%s' % '|'.join(style))
358
if self.grid:
359
url_bits.append('chg=%s' % self.grid)
360
return url_bits
361
362
# Downloading
363
# -------------------------------------------------------------------------
364
365
def download(self, file_name):
366
opener = urllib2.urlopen(self.get_url())
367
368
if opener.headers['content-type'] != 'image/png':
369
raise BadContentTypeException('Server responded with a ' \
370
'content-type of %s' % opener.headers['content-type'])
371
372
open(file_name, 'wb').write(urllib.urlopen(self.get_url()).read())
373
374
# Simple settings
375
# -------------------------------------------------------------------------
376
377
def set_title(self, title):
378
if title:
379
self.title = urllib.quote(title)
380
else:
381
self.title = None
382
383
def set_legend(self, legend):
384
"""legend needs to be a list, tuple or None"""
385
assert(isinstance(legend, list) or isinstance(legend, tuple) or
386
legend is None)
387
if legend:
388
self.legend = [urllib.quote(a) for a in legend]
389
else:
390
self.legend = None
391
392
# Chart colours
393
# -------------------------------------------------------------------------
394
395
def set_colours(self, colours):
396
# colours needs to be a list, tuple or None
397
assert(isinstance(colours, list) or isinstance(colours, tuple) or
398
colours is None)
399
# make sure the colours are in the right format
400
if colours:
401
for col in colours:
402
_check_colour(col)
403
self.colours = colours
404
405
# Background/Chart colours
406
# -------------------------------------------------------------------------
407
408
def fill_solid(self, area, colour):
409
assert(area in Chart.VALID_SOLID_FILL_TYPES)
410
_check_colour(colour)
411
self.fill_area[area] = colour
412
self.fill_types[area] = Chart.SOLID
413
414
def _check_fill_linear(self, angle, *args):
415
assert(isinstance(args, list) or isinstance(args, tuple))
416
assert(angle >= 0 and angle <= 90)
417
assert(len(args) % 2 == 0)
418
args = list(args) # args is probably a tuple and we need to mutate
419
for a in xrange(len(args) / 2):
420
col = args[a * 2]
421
offset = args[a * 2 + 1]
422
_check_colour(col)
423
assert(offset >= 0 and offset <= 1)
424
args[a * 2 + 1] = str(args[a * 2 + 1])
425
return args
426
427
def fill_linear_gradient(self, area, angle, *args):
428
assert(area in Chart.VALID_SOLID_FILL_TYPES)
429
args = self._check_fill_linear(angle, *args)
430
self.fill_types[area] = Chart.LINEAR_GRADIENT
431
self.fill_area[area] = ','.join([str(angle)] + args)
432
433
def fill_linear_stripes(self, area, angle, *args):
434
assert(area in Chart.VALID_SOLID_FILL_TYPES)
435
args = self._check_fill_linear(angle, *args)
436
self.fill_types[area] = Chart.LINEAR_STRIPES
437
self.fill_area[area] = ','.join([str(angle)] + args)
438
439
def fill_to_url(self):
440
areas = []
441
for area in (Chart.BACKGROUND, Chart.CHART, Chart.ALPHA):
442
if self.fill_types[area]:
443
areas.append('%s,%s,%s' % (area, self.fill_types[area], \
444
self.fill_area[area]))
445
if areas:
446
return 'chf=' + '|'.join(areas)
447
448
# Data
449
# -------------------------------------------------------------------------
450
451
def data_class_detection(self, data):
452
"""Determines the appropriate data encoding type to give satisfactory
453
resolution (http://code.google.com/apis/chart/#chart_data).
454
"""
455
assert(isinstance(data, list) or isinstance(data, tuple))
456
if not isinstance(self, (LineChart, BarChart, ScatterChart)):
457
# From the link above:
458
# Simple encoding is suitable for all other types of chart
459
# regardless of size.
460
return SimpleData
461
elif self.height < 100:
462
# The link above indicates that line and bar charts less
463
# than 300px in size can be suitably represented with the
464
# simple encoding. I've found that this isn't sufficient,
465
# e.g. examples/line-xy-circle.png. Let's try 100px.
466
return SimpleData
467
else:
468
return ExtendedData
469
470
def data_x_range(self):
471
"""Return a 2-tuple giving the minimum and maximum x-axis
472
data range.
473
"""
474
try:
475
lower = min([min(s) for type, s in self.annotated_data()
476
if type == 'x'])
477
upper = max([max(s) for type, s in self.annotated_data()
478
if type == 'x'])
479
return (lower, upper)
480
except ValueError:
481
return None # no x-axis datasets
482
483
def data_y_range(self):
484
"""Return a 2-tuple giving the minimum and maximum y-axis
485
data range.
486
"""
487
try:
488
lower = min([min(s) for type, s in self.annotated_data()
489
if type == 'y'])
490
upper = max([max(s) for type, s in self.annotated_data()
491
if type == 'y'])
492
return (lower, upper)
493
except ValueError:
494
return None # no y-axis datasets
495
496
def scaled_data(self, data_class, x_range=None, y_range=None):
497
"""Scale `self.data` as appropriate for the given data encoding
498
(data_class) and return it.
499
500
An optional `y_range` -- a 2-tuple (lower, upper) -- can be
501
given to specify the y-axis bounds. If not given, the range is
502
inferred from the data: (0, <max-value>) presuming no negative
503
values, or (<min-value>, <max-value>) if there are negative
504
values. `self.scaled_y_range` is set to the actual lower and
505
upper scaling range.
506
507
Ditto for `x_range`. Note that some chart types don't have x-axis
508
data.
509
"""
510
self.scaled_data_class = data_class
511
512
# Determine the x-axis range for scaling.
513
if x_range is None:
514
x_range = self.data_x_range()
515
if x_range and x_range[0] > 0:
516
x_range = (0, x_range[1])
517
self.scaled_x_range = x_range
518
519
# Determine the y-axis range for scaling.
520
if y_range is None:
521
y_range = self.data_y_range()
522
if y_range and y_range[0] > 0:
523
y_range = (0, y_range[1])
524
self.scaled_y_range = y_range
525
526
scaled_data = []
527
for type, dataset in self.annotated_data():
528
if type == 'x':
529
scale_range = x_range
530
elif type == 'y':
531
scale_range = y_range
532
elif type == 'marker-size':
533
scale_range = (0, max(dataset))
534
scaled_data.append([data_class.scale_value(v, scale_range)
535
for v in dataset])
536
return scaled_data
537
538
def add_data(self, data):
539
self.data.append(data)
540
return len(self.data) - 1 # return the "index" of the data set
541
542
def data_to_url(self, data_class=None):
543
if not data_class:
544
data_class = self.data_class_detection(self.data)
545
if not issubclass(data_class, Data):
546
raise UnknownDataTypeException()
547
if self.auto_scale:
548
data = self.scaled_data(data_class, self.x_range, self.y_range)
549
else:
550
data = self.data
551
return repr(data_class(data))
552
553
def annotated_data(self):
554
for dataset in self.data:
555
yield ('x', dataset)
556
557
# Axis Labels
558
# -------------------------------------------------------------------------
559
560
def set_axis_labels(self, axis_type, values):
561
assert(axis_type in Axis.TYPES)
562
values = [ urllib.quote(a) for a in values ]
563
axis_index = len(self.axis)
564
axis = LabelAxis(axis_index, axis_type, values)
565
self.axis.append(axis)
566
return axis_index
567
568
def set_axis_range(self, axis_type, low, high):
569
assert(axis_type in Axis.TYPES)
570
axis_index = len(self.axis)
571
axis = RangeAxis(axis_index, axis_type, low, high)
572
self.axis.append(axis)
573
return axis_index
574
575
def set_axis_positions(self, axis_index, positions):
576
try:
577
self.axis[axis_index].set_positions(positions)
578
except IndexError:
579
raise InvalidParametersException('Axis index %i has not been ' \
580
'created' % axis)
581
582
def set_axis_style(self, axis_index, colour, font_size=None, \
583
alignment=None):
584
try:
585
self.axis[axis_index].set_style(colour, font_size, alignment)
586
except IndexError:
587
raise InvalidParametersException('Axis index %i has not been ' \
588
'created' % axis)
589
590
def axis_to_url(self):
591
available_axis = []
592
label_axis = []
593
range_axis = []
594
positions = []
595
styles = []
596
index = -1
597
for axis in self.axis:
598
available_axis.append(axis.axis_type)
599
if isinstance(axis, RangeAxis):
600
range_axis.append(repr(axis))
601
if isinstance(axis, LabelAxis):
602
label_axis.append(repr(axis))
603
if axis.positions:
604
positions.append(axis.positions_to_url())
605
if axis.has_style:
606
styles.append(axis.style_to_url())
607
if not available_axis:
608
return
609
url_bits = []
610
url_bits.append('chxt=%s' % ','.join(available_axis))
611
if label_axis:
612
url_bits.append('chxl=%s' % '|'.join(label_axis))
613
if range_axis:
614
url_bits.append('chxr=%s' % '|'.join(range_axis))
615
if positions:
616
url_bits.append('chxp=%s' % '|'.join(positions))
617
if styles:
618
url_bits.append('chxs=%s' % '|'.join(styles))
619
return '&'.join(url_bits)
620
621
# Markers, Ranges and Fill area (chm)
622
# -------------------------------------------------------------------------
623
624
def markers_to_url(self):
625
return 'chm=%s' % '|'.join([','.join(a) for a in self.markers])
626
627
def add_marker(self, index, point, marker_type, colour, size, priority=0):
628
self.markers.append((marker_type, colour, str(index), str(point), \
629
str(size), str(priority)))
630
631
def add_horizontal_range(self, colour, start, stop):
632
self.markers.append(('r', colour, '1', str(start), str(stop)))
633
634
def add_vertical_range(self, colour, start, stop):
635
self.markers.append(('R', colour, '1', str(start), str(stop)))
636
637
def add_fill_range(self, colour, index_start, index_end):
638
self.markers.append(('b', colour, str(index_start), str(index_end), \
639
'1'))
640
641
def add_fill_simple(self, colour):
642
self.markers.append(('B', colour, '1', '1', '1'))
643
644
# Line styles
645
# -------------------------------------------------------------------------
646
647
def set_line_style(self, index, thickness=1, line_segment=None, \
648
blank_segment=None):
649
value = []
650
value.append(str(thickness))
651
if line_segment:
652
value.append(str(line_segment))
653
value.append(str(blank_segment))
654
self.line_styles[index] = value
655
656
# Grid
657
# -------------------------------------------------------------------------
658
659
def set_grid(self, x_step, y_step, line_segment=1, \
660
blank_segment=0):
661
self.grid = '%s,%s,%s,%s' % (x_step, y_step, line_segment, \
662
blank_segment)
663
664
665
class ScatterChart(Chart):
666
667
def type_to_url(self):
668
return 'cht=s'
669
670
def annotated_data(self):
671
yield ('x', self.data[0])
672
yield ('y', self.data[1])
673
if len(self.data) > 2:
674
# The optional third dataset is relative sizing for point
675
# markers.
676
yield ('marker-size', self.data[2])
677
678
class LineChart(Chart):
679
680
def __init__(self, *args, **kwargs):
681
assert(type(self) != LineChart) # This is an abstract class
682
Chart.__init__(self, *args, **kwargs)
683
684
# def get_url_bits(self, data_class=None):
685
# url_bits = Chart.get_url_bits(self, data_class=data_class)
686
# return url_bits
687
688
689
class SimpleLineChart(LineChart):
690
691
def type_to_url(self):
692
return 'cht=lc'
693
694
def annotated_data(self):
695
# All datasets are y-axis data.
696
for dataset in self.data:
697
yield ('y', dataset)
698
699
class SparkLineChart(SimpleLineChart):
700
701
def type_to_url(self):
702
return 'cht=ls'
703
704
class XYLineChart(LineChart):
705
706
def type_to_url(self):
707
return 'cht=lxy'
708
709
def annotated_data(self):
710
# Datasets alternate between x-axis, y-axis.
711
for i, dataset in enumerate(self.data):
712
if i % 2 == 0:
713
yield ('x', dataset)
714
else:
715
yield ('y', dataset)
716
717
class BarChart(Chart):
718
719
def __init__(self, *args, **kwargs):
720
assert(type(self) != BarChart) # This is an abstract class
721
Chart.__init__(self, *args, **kwargs)
722
self.bar_width = None
723
self.zero_lines = {}
724
725
def set_bar_width(self, bar_width):
726
self.bar_width = bar_width
727
728
def set_zero_line(self, index, zero_line):
729
self.zero_lines[index] = zero_line
730
731
def get_url_bits(self, data_class=None, skip_chbh=False):
732
url_bits = Chart.get_url_bits(self, data_class=data_class)
733
if not skip_chbh and self.bar_width is not None:
734
url_bits.append('chbh=%i' % self.bar_width)
735
zero_line = []
736
if self.zero_lines:
737
for index in xrange(max(self.zero_lines) + 1):
738
if index in self.zero_lines:
739
zero_line.append(str(self.zero_lines[index]))
740
else:
741
zero_line.append('0')
742
url_bits.append('chp=%s' % ','.join(zero_line))
743
return url_bits
744
745
746
class StackedHorizontalBarChart(BarChart):
747
748
def type_to_url(self):
749
return 'cht=bhs'
750
751
752
class StackedVerticalBarChart(BarChart):
753
754
def type_to_url(self):
755
return 'cht=bvs'
756
757
def annotated_data(self):
758
for dataset in self.data:
759
yield ('y', dataset)
760
761
762
class GroupedBarChart(BarChart):
763
764
def __init__(self, *args, **kwargs):
765
assert(type(self) != GroupedBarChart) # This is an abstract class
766
BarChart.__init__(self, *args, **kwargs)
767
self.bar_spacing = None
768
self.group_spacing = None
769
770
def set_bar_spacing(self, spacing):
771
"""Set spacing between bars in a group."""
772
self.bar_spacing = spacing
773
774
def set_group_spacing(self, spacing):
775
"""Set spacing between groups of bars."""
776
self.group_spacing = spacing
777
778
def get_url_bits(self, data_class=None):
779
# Skip 'BarChart.get_url_bits' and call Chart directly so the parent
780
# doesn't add "chbh" before we do.
781
url_bits = BarChart.get_url_bits(self, data_class=data_class,
782
skip_chbh=True)
783
if self.group_spacing is not None:
784
if self.bar_spacing is None:
785
raise InvalidParametersException('Bar spacing is required to ' \
786
'be set when setting group spacing')
787
if self.bar_width is None:
788
raise InvalidParametersException('Bar width is required to ' \
789
'be set when setting bar spacing')
790
url_bits.append('chbh=%i,%i,%i'
791
% (self.bar_width, self.bar_spacing, self.group_spacing))
792
elif self.bar_spacing is not None:
793
if self.bar_width is None:
794
raise InvalidParametersException('Bar width is required to ' \
795
'be set when setting bar spacing')
796
url_bits.append('chbh=%i,%i' % (self.bar_width, self.bar_spacing))
797
elif self.bar_width:
798
url_bits.append('chbh=%i' % self.bar_width)
799
return url_bits
800
801
802
class GroupedHorizontalBarChart(GroupedBarChart):
803
804
def type_to_url(self):
805
return 'cht=bhg'
806
807
808
class GroupedVerticalBarChart(GroupedBarChart):
809
810
def type_to_url(self):
811
return 'cht=bvg'
812
813
def annotated_data(self):
814
for dataset in self.data:
815
yield ('y', dataset)
816
817
818
class PieChart(Chart):
819
820
def __init__(self, *args, **kwargs):
821
assert(type(self) != PieChart) # This is an abstract class
822
Chart.__init__(self, *args, **kwargs)
823
self.pie_labels = []
824
825
def set_pie_labels(self, labels):
826
self.pie_labels = [urllib.quote(a) for a in labels]
827
828
def get_url_bits(self, data_class=None):
829
url_bits = Chart.get_url_bits(self, data_class=data_class)
830
if self.pie_labels:
831
url_bits.append('chl=%s' % '|'.join(self.pie_labels))
832
return url_bits
833
834
def annotated_data(self):
835
# Datasets are all y-axis data. However, there should only be
836
# one dataset for pie charts.
837
for dataset in self.data:
838
yield ('y', dataset)
839
840
841
class PieChart2D(PieChart):
842
843
def type_to_url(self):
844
return 'cht=p'
845
846
847
class PieChart3D(PieChart):
848
849
def type_to_url(self):
850
return 'cht=p3'
851
852
853
class VennChart(Chart):
854
855
def type_to_url(self):
856
return 'cht=v'
857
858
def annotated_data(self):
859
for dataset in self.data:
860
yield ('y', dataset)
861
862
863
class RadarChart(Chart):
864
865
def type_to_url(self):
866
return 'cht=r'
867
868
class SplineRadarChart(RadarChart):
869
870
def type_to_url(self):
871
return 'cht=rs'
872
873
874
class MapChart(Chart):
875
876
def __init__(self, *args, **kwargs):
877
Chart.__init__(self, *args, **kwargs)
878
self.geo_area = 'world'
879
self.codes = []
880
881
def type_to_url(self):
882
return 'cht=t'
883
884
def set_codes(self, codes):
885
self.codes = codes
886
887
def get_url_bits(self, data_class=None):
888
url_bits = Chart.get_url_bits(self, data_class=data_class)
889
url_bits.append('chtm=%s' % self.geo_area)
890
if self.codes:
891
url_bits.append('chld=%s' % ''.join(self.codes))
892
return url_bits
893
894
895
class GoogleOMeterChart(PieChart):
896
"""Inheriting from PieChart because of similar labeling"""
897
898
def type_to_url(self):
899
return 'cht=gom'
900
901
902
def test():
903
chart = PieChart2D(320, 200)
904
chart = ScatterChart(320, 200)
905
chart = SimpleLineChart(320, 200)
906
chart = GroupedVerticalBarChart(320, 200)
907
# chart = SplineRadarChart(500, 500)
908
# chart = MapChart(440, 220)
909
# chart = GoogleOMeterChart(440, 220, x_range=(0, 100))
910
sine_data = [math.sin(float(a) / math.pi) * 100 for a in xrange(100)]
911
random_data = [random.random() * 100 for a in xrange(100)]
912
random_data2 = [random.random() * 50 for a in xrange(100)]
913
# chart.set_bar_width(50)
914
# chart.set_bar_spacing(0)
915
chart.add_data(sine_data)
916
chart.add_data(random_data)
917
chart.set_zero_line(1, .5)
918
# chart.add_data(random_data2)
919
# chart.set_line_style(0, thickness=5)
920
# chart.set_line_style(1, thickness=2, line_segment=10, blank_segment=5)
921
# chart.set_title('heloooo weeee')
922
# chart.set_legend(('sine wave', 'random * x'))
923
chart.set_colours(('ee2000', 'DDDDAA', 'fF03f2'))
924
# chart.fill_solid(Chart.ALPHA, '123456')
925
# chart.fill_linear_gradient(Chart.ALPHA, 20, '004070', 1, '300040', 0,
926
# 'aabbcc55', 0.5)
927
# chart.fill_linear_stripes(Chart.CHART, 20, '204070', .2, '300040', .2,
928
# 'aabbcc00', 0.2)
929
# axis_left_index = chart.set_axis_range(Axis.LEFT, 0, 10)
930
# axis_right_index = chart.set_axis_range(Axis.RIGHT, 5, 30)
931
# axis_bottom_index = chart.set_axis_labels(Axis.BOTTOM, [1, 25, 95])
932
# chart.set_axis_positions(axis_bottom_index, [1, 25, 95])
933
# chart.set_axis_style(axis_bottom_index, '003050', 15)
934
935
# chart.set_pie_labels(('apples', 'oranges', 'bananas'))
936
937
# chart.set_grid(10, 10)
938
# for a in xrange(0, 100, 10):
939
# chart.add_marker(1, a, 'a', 'AACA20', 10)
940
941
# chart.add_horizontal_range('00A020', .2, .5)
942
# chart.add_vertical_range('00c030', .2, .4)
943
944
# chart.add_fill_simple('303030A0')
945
946
# chart.set_codes(['AU', 'AT', 'US'])
947
# chart.add_data([1,2,3])
948
# chart.set_colours(('EEEEEE', '000000', '00FF00'))
949
950
# chart.add_data([50,75])
951
# chart.set_pie_labels(('apples', 'oranges'))
952
953
url = chart.get_url()
954
print url
955
956
chart.download('test.png')
957
958
if 1:
959
data = urllib.urlopen(chart.get_url()).read()
960
open('meh.png', 'wb').write(data)
961
os.system('eog meh.png')
962
963
964
if __name__ == '__main__':
965
test()
966
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
__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 = []
135
for value in data:
136
if value is None:
137
sub_data.append('__')
138
elif value >= 0 and value <= ExtendedData.max_value:
139
first, second = divmod(int(value), enc_size)
140
sub_data.append('%s%s' % (
141
ExtendedData.enc_map[first],
142
ExtendedData.enc_map[second]))
143
else:
144
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()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0