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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:
- .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/
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6
Copyright 2007-2009 Gerald Kaszuba
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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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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
from __future__ import division
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24
import os
25
import urllib
26
import urllib.request, urllib.error
27
import math
28
import random
29
import re
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import warnings
31
import copy
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33
# Helper variables and functions
34
# -----------------------------------------------------------------------------
35
36
__version__ = '0.3.0'
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__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
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60
61
class DataOutOfRangeException(PyGoogleChartException):
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pass
63
64
65
class UnknownDataTypeException(PyGoogleChartException):
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pass
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68
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class NoDataGivenException(PyGoogleChartException):
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pass
71
72
73
class InvalidParametersException(PyGoogleChartException):
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pass
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76
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class BadContentTypeException(PyGoogleChartException):
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pass
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80
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class AbstractClassException(PyGoogleChartException):
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pass
83
84
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class UnknownChartType(PyGoogleChartException):
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pass
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class UnknownCountryCodeException(PyGoogleChartException):
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pass
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# Data Classes
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# -----------------------------------------------------------------------------
93
94
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class Data(object):
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def __init__(self, data):
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if type(self) == Data:
99
raise AbstractClassException('This is an abstract class')
100
self.data = data
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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))
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113
@classmethod
114
def int_scale_value(cls, value, range):
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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:
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warnings.warn('One or more of of your data points has been '
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'clipped because it is out of range.')
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130
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class SimpleData(Data):
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max_value = 61
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enc_map = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
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def __repr__(self):
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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('_')
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elif value >= 0 and value <= self.max_value:
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sub_data.append(SimpleData.enc_map[value])
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else:
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raise DataOutOfRangeException('cannot encode value: %d'
147
% value)
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encoded_data.append(''.join(sub_data))
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return 'chd=s:' + ','.join(encoded_data)
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class TextData(Data):
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max_value = 100
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def __repr__(self):
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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:
162
sub_data.append(-1)
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elif value >= 0 and value <= self.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))
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return 'chd=t:' + '%7c'.join(encoded_data)
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@classmethod
171
def scale_value(cls, value, range):
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# use float values instead of integers because we don't need an encode
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# map index
174
scaled = cls.float_scale_value(value, range)
175
clipped = cls.clip_value(scaled)
176
Data.check_clip(scaled, clipped)
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return clipped
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179
180
class ExtendedData(Data):
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182
max_value = 4095
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enc_map = \
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'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-.'
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186
def __repr__(self):
187
encoded_data = []
188
enc_size = len(ExtendedData.enc_map)
189
for data in self.data:
190
sub_data = []
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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],
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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
__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