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- Committer: gak
- Date: 2007-12-13 05:31:11 UTC
- Revision ID: git-v1:606b8fe55157458136af5c54683fe3079a000b92
Added GPL license file "COPYING"
- files removed:
- .gitignore
- examples
- examples/helpers
- scripts
- test
- files modified:
- pygooglechart.py
added
removed
pygooglechart.py
1
"""
2
pygooglechart - A complete Python wrapper for the Google Chart API
3
4
http://pygooglechart.slowchop.com/
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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
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(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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import os
25
import urllib
26
import urllib2
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import math
28
import random
29
import re
30
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'
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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)
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47
48
def _reset_warnings():
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"""Helper function to reset all warnings. Used by the unit tests."""
50
globals()['__warningregistry__'] = None
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52
53
# Exception Classes
54
# -----------------------------------------------------------------------------
55
56
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class PyGoogleChartException(Exception):
58
pass
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class DataOutOfRangeException(PyGoogleChartException):
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pass
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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
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class InvalidParametersException(PyGoogleChartException):
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pass
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class BadContentTypeException(PyGoogleChartException):
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pass
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class AbstractClassException(PyGoogleChartException):
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pass
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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
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class Data(object):
96
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def __init__(self, data):
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if type(self) == Data:
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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):
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lower, upper = range
105
assert(upper > lower)
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scaled = (value - lower) * (cls.max_value / (upper - lower))
107
return scaled
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109
@classmethod
110
def clip_value(cls, value):
111
return max(0, min(value, cls.max_value))
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@classmethod
114
def int_scale_value(cls, value, range):
115
return int(round(cls.float_scale_value(value, range)))
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117
@classmethod
118
def scale_value(cls, value, range):
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scaled = cls.int_scale_value(value, range)
120
clipped = cls.clip_value(scaled)
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Data.check_clip(scaled, clipped)
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return clipped
123
124
@staticmethod
125
def check_clip(scaled, clipped):
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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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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'
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% 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:
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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
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scaled = cls.float_scale_value(value, range)
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clipped = cls.clip_value(scaled)
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Data.check_clip(scaled, clipped)
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return clipped
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class ExtendedData(Data):
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max_value = 4095
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enc_map = \
184
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-.'
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186
def __repr__(self):
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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:
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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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first, second = divmod(int(value), enc_size)
196
sub_data.append('%s%s' % (
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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), \
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value))
203
encoded_data.append(''.join(sub_data))
204
return 'chd=e:' + ','.join(encoded_data)
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206
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# Axis Classes
208
# -----------------------------------------------------------------------------
209
210
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class Axis(object):
212
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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
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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 xrange(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 = urllib2.urlopen(self.BASE_URL, self.get_url_extension())
395
else:
396
opener = urllib2.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.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.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.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 xrange(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.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 xrange(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.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.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 math
26
import random
27
import re
28
29
# Helper variables and functions
30
# -----------------------------------------------------------------------------
31
32
reo_colour = re.compile('^([A-Fa-f0-9]{2,2}){3,4}$')
33
34
def _check_colour(colour):
35
if not reo_colour.match(colour):
36
raise InvalidParametersException('Colours need to be in ' \
37
'RRGGBB or RRGGBBAA format. One of your colours has %s' % \
38
colour)
39
40
# Exception Classes
41
# -----------------------------------------------------------------------------
42
43
class PyGoogleChartException(Exception):
44
pass
45
46
class DataOutOfRangeException(PyGoogleChartException):
47
pass
48
49
class UnknownDataTypeException(PyGoogleChartException):
50
pass
51
52
class NoDataGivenException(PyGoogleChartException):
53
pass
54
55
class InvalidParametersException(PyGoogleChartException):
56
pass
57
58
# Data Classes
59
# -----------------------------------------------------------------------------
60
61
class Data(object):
62
def __init__(self, data):
63
assert(type(self) != Data) # This is an abstract class
64
self.data = data
65
66
class SimpleData(Data):
67
enc_map = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
68
def __repr__(self):
69
encoded_data = []
70
for data in self.data:
71
sub_data = []
72
for value in data:
73
if value is None:
74
sub_data.append('_')
75
elif value >= 0 and value <= SimpleData.max_value:
76
sub_data.append(SimpleData.enc_map[value])
77
else:
78
raise DataOutOfRangeException()
79
encoded_data.append(''.join(sub_data))
80
return 'chd=s:' + ','.join(encoded_data)
81
@staticmethod
82
def max_value():
83
return 61
84
85
class TextData(Data):
86
def __repr__(self):
87
encoded_data = []
88
for data in self.data:
89
sub_data = []
90
for value in data:
91
if value is None:
92
sub_data.append(-1)
93
elif value >= 0 and value <= TextData.max_value:
94
sub_data.append(str(float(value)))
95
else:
96
raise DataOutOfRangeException()
97
encoded_data.append(','.join(sub_data))
98
return 'chd=t:' + '|'.join(encoded_data)
99
@staticmethod
100
def max_value():
101
return 100
102
103
class ExtendedData(Data):
104
enc_map = \
105
'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-.'
106
def __repr__(self):
107
encoded_data = []
108
enc_size = len(ExtendedData.enc_map)
109
for data in self.data:
110
sub_data = []
111
for value in data:
112
if value is None:
113
sub_data.append('__')
114
elif value >= 0 and value <= ExtendedData.max_value:
115
first, second = divmod(int(value), enc_size)
116
sub_data.append('%s%s' % (
117
ExtendedData.enc_map[first],
118
ExtendedData.enc_map[second]))
119
else:
120
raise DataOutOfRangeException( \
121
'Item #%i "%s" is out of range' % (data.index(value), \
122
value))
123
encoded_data.append(''.join(sub_data))
124
return 'chd=e:' + ','.join(encoded_data)
125
@staticmethod
126
def max_value():
127
return 4095
128
129
# Axis Classes
130
# -----------------------------------------------------------------------------
131
132
class Axis(object):
133
BOTTOM = 'x'
134
TOP = 't'
135
LEFT = 'y'
136
RIGHT = 'r'
137
TYPES = (BOTTOM, TOP, LEFT, RIGHT)
138
def __init__(self, axis, **kw):
139
assert(axis in Axis.TYPES)
140
self.has_style = False
141
self.index = None
142
self.positions = None
143
def set_index(self, index):
144
self.index = index
145
def set_positions(self, positions):
146
self.positions = positions
147
def set_style(self, colour, font_size=None, alignment=None):
148
_check_colour(colour)
149
self.colour = colour
150
self.font_size = font_size
151
self.alignment = alignment
152
self.has_style = True
153
def style_to_url(self):
154
bits = []
155
bits.append(str(self.index))
156
bits.append(self.colour)
157
if self.font_size is not None:
158
bits.append(str(self.font_size))
159
if self.alignment is not None:
160
bits.append(str(self.alignment))
161
return ','.join(bits)
162
def positions_to_url(self):
163
bits = []
164
bits.append(str(self.index))
165
bits += [ str(a) for a in self.positions ]
166
return ','.join(bits)
167
168
class LabelAxis(Axis):
169
def __init__(self, axis, values, **kwargs):
170
Axis.__init__(self, axis, **kwargs)
171
self.values = [ str(a) for a in values ]
172
def __repr__(self):
173
return '%i:|%s' % (self.index, '|'.join(self.values))
174
175
class RangeAxis(Axis):
176
def __init__(self, axis, low, high, **kwargs):
177
Axis.__init__(self, axis, **kwargs)
178
self.low = low
179
self.high = high
180
def __repr__(self):
181
return '%i,%s,%s' % (self.index, self.low, self.high)
182
183
# Chart Classes
184
# -----------------------------------------------------------------------------
185
186
class Chart(object):
187
188
BASE_URL = 'http://chart.apis.google.com/chart?'
189
BACKGROUND = 'bg'
190
CHART = 'c'
191
SOLID = 's'
192
LINEAR_GRADIENT = 'lg'
193
LINEAR_STRIPES = 'ls'
194
195
def __init__(self, width, height, title=None, legend=None, colours=None):
196
assert(type(self) != Chart) # This is an abstract class
197
assert(isinstance(width, int))
198
assert(isinstance(height, int))
199
self.width = width
200
self.height = height
201
self.data = []
202
self.set_title(title)
203
self.set_legend(legend)
204
self.set_colours(colours)
205
self.fill_types = {
206
Chart.BACKGROUND: None,
207
Chart.CHART: None,
208
}
209
self.fill_area = {
210
Chart.BACKGROUND: None,
211
Chart.CHART: None,
212
}
213
self.axis = {
214
Axis.TOP: None,
215
Axis.BOTTOM: None,
216
Axis.LEFT: None,
217
Axis.RIGHT: None,
218
}
219
self.markers = []
220
221
# URL generation
222
# -------------------------------------------------------------------------
223
224
def get_url(self):
225
url_bits = self.get_url_bits()
226
return self.BASE_URL + '&'.join(url_bits)
227
228
def get_url_bits(self):
229
url_bits = []
230
# required arguments
231
url_bits.append(self.type_to_url())
232
url_bits.append('chs=%ix%i' % (self.width, self.height))
233
url_bits.append(self.data_to_url())
234
# optional arguments
235
if self.title:
236
url_bits.append('chtt=%s' % self.title)
237
if self.legend:
238
url_bits.append('chdl=%s' % '|'.join(self.legend))
239
if self.colours:
240
url_bits.append('chco=%s' % ','.join(self.colours))
241
ret = self.fill_to_url()
242
if ret:
243
url_bits.append(ret)
244
ret = self.axis_to_url()
245
if ret:
246
url_bits.append(ret)
247
if self.markers:
248
url_bits.append(self.markers_to_url())
249
return url_bits
250
251
# Downloading
252
# -------------------------------------------------------------------------
253
def download(self, file_name):
254
open(file_name, 'wb').write(urllib.urlopen(self.get_url()).read())
255
256
# Simple settings
257
# -------------------------------------------------------------------------
258
259
def set_title(self, title):
260
if title:
261
self.title = urllib.quote(title)
262
else:
263
self.title = None
264
265
def set_legend(self, legend):
266
# legend needs to be a list, tuple or None
267
assert(isinstance(legend, list) or isinstance(legend, tuple) or
268
legend is None)
269
if legend:
270
self.legend = [ urllib.quote(a) for a in legend ]
271
else:
272
self.legend = None
273
274
# Chart colours
275
# -------------------------------------------------------------------------
276
277
def set_colours(self, colours):
278
# colours needs to be a list, tuple or None
279
assert(isinstance(colours, list) or isinstance(colours, tuple) or
280
colours is None)
281
# make sure the colours are in the right format
282
if colours:
283
for col in colours:
284
_check_colour(col)
285
self.colours = colours
286
287
# Background/Chart colours
288
# -------------------------------------------------------------------------
289
290
def fill_solid(self, area, colour):
291
assert(area in (Chart.BACKGROUND, Chart.CHART))
292
_check_colour(colour)
293
self.fill_area[area] = colour
294
self.fill_types[area] = Chart.SOLID
295
296
def _check_fill_linear(self, angle, *args):
297
assert(isinstance(args, list) or isinstance(args, tuple))
298
assert(angle >= 0 and angle <= 90)
299
assert(len(args) % 2 == 0)
300
args = list(args) # args is probably a tuple and we need to mutate
301
for a in xrange(len(args) / 2):
302
col = args[a * 2]
303
offset = args[a * 2 + 1]
304
_check_colour(col)
305
assert(offset >= 0 and offset <= 1)
306
args[a * 2 + 1] = str(args[a * 2 + 1])
307
return args
308
309
def fill_linear_gradient(self, area, angle, *args):
310
assert(area in (Chart.BACKGROUND, Chart.CHART))
311
args = self._check_fill_linear(angle, *args)
312
self.fill_types[area] = Chart.LINEAR_GRADIENT
313
self.fill_area[area] = ','.join([str(angle)] + args)
314
315
def fill_linear_stripes(self, area, angle, *args):
316
assert(area in (Chart.BACKGROUND, Chart.CHART))
317
args = self._check_fill_linear(angle, *args)
318
self.fill_types[area] = Chart.LINEAR_STRIPES
319
self.fill_area[area] = ','.join([str(angle)] + args)
320
321
def fill_to_url(self):
322
areas = []
323
for area in (Chart.BACKGROUND, Chart.CHART):
324
if self.fill_types[area]:
325
areas.append('%s,%s,%s' % (area, self.fill_types[area], \
326
self.fill_area[area]))
327
if areas:
328
return 'chf=' + '|'.join(areas)
329
330
# Data
331
# -------------------------------------------------------------------------
332
333
def data_class_detection(self, data):
334
"""
335
Detects and returns the data type required based on the range of the
336
data given. The data given must be lists of numbers within a list.
337
"""
338
assert(isinstance(data, list) or isinstance(data, tuple))
339
max_value = None
340
for a in data:
341
assert(isinstance(a, list) or isinstance(a, tuple))
342
if max_value is None or max(a) > max_value:
343
max_value = max(a)
344
for data_class in (SimpleData, TextData, ExtendedData):
345
if max_value <= data_class.max_value():
346
return data_class
347
raise DataOutOfRangeException()
348
349
def add_data(self, data):
350
self.data.append(data)
351
352
def data_to_url(self, data_class=None):
353
if not data_class:
354
data_class = self.data_class_detection(self.data)
355
if not issubclass(data_class, Data):
356
raise UnknownDataTypeException()
357
return repr(data_class(self.data))
358
359
# Axis Labels
360
# -------------------------------------------------------------------------
361
362
def set_axis_labels(self, axis, values):
363
assert(axis in Axis.TYPES)
364
self.axis[axis] = LabelAxis(axis, values)
365
366
def set_axis_range(self, axis, low, high):
367
assert(axis in Axis.TYPES)
368
self.axis[axis] = RangeAxis(axis, low, high)
369
370
def set_axis_positions(self, axis, positions):
371
assert(axis in Axis.TYPES)
372
if not self.axis[axis]:
373
raise InvalidParametersException('Please create an axis first')
374
self.axis[axis].set_positions(positions)
375
376
def set_axis_style(self, axis, colour, font_size=None, alignment=None):
377
assert(axis in Axis.TYPES)
378
if not self.axis[axis]:
379
raise InvalidParametersException('Please create an axis first')
380
self.axis[axis].set_style(colour, font_size, alignment)
381
382
def axis_to_url(self):
383
available_axis = []
384
label_axis = []
385
range_axis = []
386
positions = []
387
styles = []
388
index = -1
389
for position, axis in self.axis.items():
390
if not axis:
391
continue
392
index += 1
393
axis.set_index(index)
394
available_axis.append(position)
395
if isinstance(axis, RangeAxis):
396
range_axis.append(repr(axis))
397
if isinstance(axis, LabelAxis):
398
label_axis.append(repr(axis))
399
if axis.positions:
400
positions.append(axis.positions_to_url())
401
if axis.has_style:
402
styles.append(axis.style_to_url())
403
if not available_axis:
404
return
405
url_bits = []
406
url_bits.append('chxt=%s' % ','.join(available_axis))
407
if label_axis:
408
url_bits.append('chxl=%s' % '|'.join(label_axis))
409
if range_axis:
410
url_bits.append('chxr=%s' % '|'.join(range_axis))
411
if positions:
412
url_bits.append('chxp=%s' % '|'.join(positions))
413
if styles:
414
url_bits.append('chxs=%s' % '|'.join(styles))
415
return '&'.join(url_bits)
416
417
# Markers, Ranges and Fill area (chm)
418
# -------------------------------------------------------------------------
419
420
def markers_to_url(self):
421
return 'chm=%s' % '|'.join([ ','.join(a) for a in self.markers ])
422
423
def add_marker(self, index, point, marker_type, colour, size):
424
self.markers.append((marker_type, colour, str(index), str(point), \
425
str(size)))
426
427
def add_horizontal_range(self, colour, start, stop):
428
self.markers.append(('r', colour, '1', str(start), str(stop)))
429
430
def add_vertical_range(self, colour, start, stop):
431
self.markers.append(('R', colour, '1', str(start), str(stop)))
432
433
def add_fill_range(self, colour, index_start, index_end):
434
self.markers.append(('b', colour, str(index_start), str(index_end), \
435
'1'))
436
437
def add_fill_simple(self, colour):
438
self.markers.append(('B', colour, '1', '1', '1'))
439
440
class ScatterChart(Chart):
441
def __init__(self, *args, **kwargs):
442
Chart.__init__(self, *args, **kwargs)
443
def type_to_url(self):
444
return 'cht=s'
445
446
447
class LineChart(Chart):
448
def __init__(self, *args, **kwargs):
449
Chart.__init__(self, *args, **kwargs)
450
self.line_styles = {}
451
self.grid = None
452
def set_line_style(self, index, thickness=1, line_segment=None, \
453
blank_segment=None):
454
value = []
455
value.append(str(thickness))
456
if line_segment:
457
value.append(str(line_segment))
458
value.append(str(blank_segment))
459
self.line_styles[index] = value
460
def set_grid(self, x_step, y_step, line_segment=1, \
461
blank_segment=0):
462
self.grid = '%s,%s,%s,%s' % (x_step, y_step, line_segment, \
463
blank_segment)
464
def get_url_bits(self):
465
url_bits = Chart.get_url_bits(self)
466
if self.line_styles:
467
style = []
468
# for index, values in self.line_style.items():
469
for index in xrange(max(self.line_styles) + 1):
470
if index in self.line_styles:
471
values = self.line_styles[index]
472
else:
473
values = ('1', )
474
style.append(','.join(values))
475
url_bits.append('chls=%s' % '|'.join(style))
476
if self.grid:
477
url_bits.append('chg=%s' % self.grid)
478
return url_bits
479
480
class SimpleLineChart(LineChart):
481
def type_to_url(self):
482
return 'cht=lc'
483
484
class XYLineChart(LineChart):
485
def type_to_url(self):
486
return 'cht=lxy'
487
488
class BarChart(Chart):
489
def __init__(self, *args, **kwargs):
490
assert(type(self) != BarChart) # This is an abstract class
491
Chart.__init__(self, *args, **kwargs)
492
self.bar_width = None
493
def set_bar_width(self, bar_width):
494
self.bar_width = bar_width
495
def get_url_bits(self):
496
url_bits = Chart.get_url_bits(self)
497
url_bits.append('chbh=%i' % self.bar_width)
498
return url_bits
499
500
class StackedHorizontalBarChart(BarChart):
501
def type_to_url(self):
502
return 'cht=bhs'
503
504
class StackedVerticalBarChart(BarChart):
505
def type_to_url(self):
506
return 'cht=bvs'
507
508
class GroupedBarChart(BarChart):
509
def __init__(self, *args, **kwargs):
510
assert(type(self) != GroupedBarChart) # This is an abstract class
511
BarChart.__init__(self, *args, **kwargs)
512
self.bar_spacing = None
513
def set_bar_spacing(self, spacing):
514
self.bar_spacing = spacing
515
def get_url_bits(self):
516
# Skip 'BarChart.get_url_bits' and call Chart directly so the parent
517
# doesn't add "chbh" before we do.
518
url_bits = Chart.get_url_bits(self)
519
if self.bar_spacing is not None:
520
if self.bar_width is None:
521
raise InvalidParametersException('Bar width is required to ' \
522
'be set when setting spacing')
523
url_bits.append('chbh=%i,%i' % (self.bar_width, self.bar_spacing))
524
else:
525
url_bits.append('chbh=%i' % self.bar_width)
526
return url_bits
527
528
class GroupedHorizontalBarChart(GroupedBarChart):
529
def type_to_url(self):
530
return 'cht=bhg'
531
532
class GroupedVerticalBarChart(GroupedBarChart):
533
def type_to_url(self):
534
return 'cht=bvg'
535
536
class PieChart(Chart):
537
def __init__(self, *args, **kwargs):
538
assert(type(self) != PieChart) # This is an abstract class
539
Chart.__init__(self, *args, **kwargs)
540
self.pie_labels = []
541
def set_pie_labels(self, labels):
542
self.pie_labels = labels
543
def get_url_bits(self):
544
url_bits = Chart.get_url_bits(self)
545
if self.pie_labels:
546
url_bits.append('chl=%s' % '|'.join(self.pie_labels))
547
return url_bits
548
549
class PieChart2D(PieChart):
550
def type_to_url(self):
551
return 'cht=p'
552
553
class PieChart3D(PieChart):
554
def type_to_url(self):
555
return 'cht=p3'
556
557
class VennChart(Chart):
558
def type_to_url(self):
559
return 'cht=v'
560
561
def test():
562
chart = GroupedVerticalBarChart(320, 200)
563
chart = PieChart2D(320, 200)
564
chart = ScatterChart(320, 200)
565
chart = SimpleLineChart(320, 200)
566
sine_data = [ math.sin(float(a) / 10) * 2000 + 2000 for a in xrange(100) ]
567
random_data = [ a * random.random() * 30 for a in xrange(40) ]
568
random_data2 = [ random.random() * 4000 for a in xrange(10) ]
569
# chart.set_bar_width(50)
570
# chart.set_bar_spacing(0)
571
chart.add_data(sine_data)
572
chart.add_data(random_data)
573
chart.add_data(random_data2)
574
# chart.set_line_style(1, thickness=2)
575
# chart.set_line_style(2, line_segment=10, blank_segment=5)
576
# chart.set_title('heloooo')
577
# chart.set_legend(('sine wave', 'random * x'))
578
# chart.set_colours(('ee2000', 'DDDDAA', 'fF03f2'))
579
# chart.fill_solid(Chart.BACKGROUND, '123456')
580
# chart.fill_linear_gradient(Chart.CHART, 20, '004070', 1, '300040', 0,
581
# 'aabbcc00', 0.5)
582
# chart.fill_linear_stripes(Chart.CHART, 20, '204070', .2, '300040', .2,
583
# 'aabbcc00', 0.2)
584
chart.set_axis_range(Axis.LEFT, 0, 10)
585
chart.set_axis_range(Axis.RIGHT, 5, 30)
586
chart.set_axis_labels(Axis.BOTTOM, [1, 25, 95])
587
chart.set_axis_positions(Axis.BOTTOM, [1, 25, 95])
588
chart.set_axis_style(Axis.BOTTOM, 'FFFFFF', 15)
589
590
# chart.set_pie_labels(('apples', 'oranges', 'bananas'))
591
592
# chart.set_grid(10, 10)
593
594
# for a in xrange(0, 100, 10):
595
# chart.add_marker(1, a, 'a', 'AACA20', 10)
596
597
chart.add_horizontal_range('00A020', .2, .5)
598
chart.add_vertical_range('00c030', .2, .4)
599
600
chart.add_fill_simple('303030A0')
601
602
603
chart = SimpleLineChart(320, 200)
604
data = [ 1, 5, 30, 10, 25 ]
605
chart.add_data(data)
606
chart.set_title('Hello World!')
607
chart.set_axis_range(Axis.LEFT, 0, 10)
608
print chart.get_url()
609
chart.download('hello.png')
610
611
url = chart.get_url()
612
print url
613
if 0:
614
data = urllib.urlopen(chart.get_url()).read()
615
open('meh.png', 'wb').write(data)
616
os.system('start meh.png')
617
618
if __name__ == '__main__':
619
test()
620
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0