Repository navigation
Expand file tree
/
Copy pathcollections.py
More file actions
1908 lines (1579 loc) · 64.1 KB
/
Copy pathcollections.py
File metadata and controls
1908 lines (1579 loc) · 64.1 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
"""
Classes for the efficient drawing of large collections of objects that
share most properties, e.g., a large number of line segments or
polygons.
The classes are not meant to be as flexible as their single element
counterparts (e.g., you may not be able to select all line styles) but
they are meant to be fast for common use cases (e.g., a large set of solid
line segemnts)
"""
from __future__ import (absolute_import, division, print_function,
unicode_literals)
import six
from six.moves import zip
try:
from math import gcd
except ImportError:
# LPy workaround
from fractions import gcd
import numpy as np
import matplotlib as mpl
import matplotlib.cbook as cbook
import matplotlib.colors as mcolors
import matplotlib.cm as cm
from matplotlib import docstring
import matplotlib.transforms as transforms
import matplotlib.artist as artist
from matplotlib.artist import allow_rasterization
import matplotlib.path as mpath
from matplotlib import _path
import matplotlib.mlab as mlab
import matplotlib.lines as mlines
CIRCLE_AREA_FACTOR = 1.0 / np.sqrt(np.pi)
_color_aliases = {'facecolors': ['facecolor'],
'edgecolors': ['edgecolor']}
class Collection(artist.Artist, cm.ScalarMappable):
"""
Base class for Collections. Must be subclassed to be usable.
All properties in a collection must be sequences or scalars;
if scalars, they will be converted to sequences. The
property of the ith element of the collection is::
prop[i % len(props)]
Keyword arguments and default values:
* *edgecolors*: None
* *facecolors*: None
* *linewidths*: None
* *antialiaseds*: None
* *offsets*: None
* *transOffset*: transforms.IdentityTransform()
* *offset_position*: 'screen' (default) or 'data'
* *norm*: None (optional for
:class:`matplotlib.cm.ScalarMappable`)
* *cmap*: None (optional for
:class:`matplotlib.cm.ScalarMappable`)
* *hatch*: None
* *zorder*: 1
*offsets* and *transOffset* are used to translate the patch after
rendering (default no offsets). If offset_position is 'screen'
(default) the offset is applied after the master transform has
been applied, that is, the offsets are in screen coordinates. If
offset_position is 'data', the offset is applied before the master
transform, i.e., the offsets are in data coordinates.
If any of *edgecolors*, *facecolors*, *linewidths*, *antialiaseds*
are None, they default to their :data:`matplotlib.rcParams` patch
setting, in sequence form.
The use of :class:`~matplotlib.cm.ScalarMappable` is optional. If
the :class:`~matplotlib.cm.ScalarMappable` matrix _A is not None
(i.e., a call to set_array has been made), at draw time a call to
scalar mappable will be made to set the face colors.
"""
_offsets = np.zeros((0, 2))
_transOffset = transforms.IdentityTransform()
#: Either a list of 3x3 arrays or an Nx3x3 array of transforms, suitable
#: for the `all_transforms` argument to
#: :meth:`~matplotlib.backend_bases.RendererBase.draw_path_collection`;
#: each 3x3 array is used to initialize an
#: :class:`~matplotlib.transforms.Affine2D` object.
#: Each kind of collection defines this based on its arguments.
_transforms = np.empty((0, 3, 3))
# Whether to draw an edge by default. Set on a
# subclass-by-subclass basis.
_edge_default = False
def __init__(self,
edgecolors=None,
facecolors=None,
linewidths=None,
linestyles='solid',
antialiaseds=None,
offsets=None,
transOffset=None,
norm=None, # optional for ScalarMappable
cmap=None, # ditto
pickradius=5.0,
hatch=None,
urls=None,
offset_position='screen',
zorder=1,
**kwargs
):
"""
Create a Collection
%(Collection)s
"""
artist.Artist.__init__(self)
cm.ScalarMappable.__init__(self, norm, cmap)
# list of un-scaled dash patterns
# this is needed scaling the dash pattern by linewidth
self._us_linestyles = [(None, None)]
# list of dash patterns
self._linestyles = [(None, None)]
# list of unbroadcast/scaled linewidths
self._us_lw = [0]
self._linewidths = [0]
self._is_filled = True # May be modified by set_facecolor().
self._hatch_color = mcolors.to_rgba(mpl.rcParams['hatch.color'])
self.set_facecolor(facecolors)
self.set_edgecolor(edgecolors)
self.set_linewidth(linewidths)
self.set_linestyle(linestyles)
self.set_antialiased(antialiaseds)
self.set_pickradius(pickradius)
self.set_urls(urls)
self.set_hatch(hatch)
self.set_offset_position(offset_position)
self.set_zorder(zorder)
self._uniform_offsets = None
self._offsets = np.array([[0, 0]], float)
if offsets is not None:
offsets = np.asanyarray(offsets, float)
if transOffset is not None:
self._offsets = offsets
self._transOffset = transOffset
else:
self._uniform_offsets = offsets
self._path_effects = None
self.update(kwargs)
self._paths = None
def get_paths(self):
return self._paths
def set_paths(self):
raise NotImplementedError
def get_transforms(self):
return self._transforms
def get_offset_transform(self):
t = self._transOffset
if (not isinstance(t, transforms.Transform)
and hasattr(t, '_as_mpl_transform')):
t = t._as_mpl_transform(self.axes)
return t
def get_datalim(self, transData):
transform = self.get_transform()
transOffset = self.get_offset_transform()
offsets = self._offsets
paths = self.get_paths()
if not transform.is_affine:
paths = [transform.transform_path_non_affine(p) for p in paths]
transform = transform.get_affine()
if not transOffset.is_affine:
offsets = transOffset.transform_non_affine(offsets)
transOffset = transOffset.get_affine()
if isinstance(offsets, np.ma.MaskedArray):
offsets = offsets.filled(np.nan)
# get_path_collection_extents handles nan but not masked arrays
if len(paths) and len(offsets):
result = mpath.get_path_collection_extents(
transform.frozen(), paths, self.get_transforms(),
offsets, transOffset.frozen())
result = result.inverse_transformed(transData)
else:
result = transforms.Bbox.null()
return result
def get_window_extent(self, renderer):
# TODO:check to ensure that this does not fail for
# cases other than scatter plot legend
return self.get_datalim(transforms.IdentityTransform())
def _prepare_points(self):
"""Point prep for drawing and hit testing"""
transform = self.get_transform()
transOffset = self.get_offset_transform()
offsets = self._offsets
paths = self.get_paths()
if self.have_units():
paths = []
for path in self.get_paths():
vertices = path.vertices
xs, ys = vertices[:, 0], vertices[:, 1]
xs = self.convert_xunits(xs)
ys = self.convert_yunits(ys)
paths.append(mpath.Path(np.column_stack([xs, ys]), path.codes))
if offsets.size > 0:
xs = self.convert_xunits(offsets[:, 0])
ys = self.convert_yunits(offsets[:, 1])
offsets = np.column_stack([xs, ys])
if not transform.is_affine:
paths = [transform.transform_path_non_affine(path)
for path in paths]
transform = transform.get_affine()
if not transOffset.is_affine:
offsets = transOffset.transform_non_affine(offsets)
# This might have changed an ndarray into a masked array.
transOffset = transOffset.get_affine()
if isinstance(offsets, np.ma.MaskedArray):
offsets = offsets.filled(np.nan)
# Changing from a masked array to nan-filled ndarray
# is probably most efficient at this point.
return transform, transOffset, offsets, paths
@allow_rasterization
def draw(self, renderer):
if not self.get_visible():
return
renderer.open_group(self.__class__.__name__, self.get_gid())
self.update_scalarmappable()
transform, transOffset, offsets, paths = self._prepare_points()
gc = renderer.new_gc()
self._set_gc_clip(gc)
gc.set_snap(self.get_snap())
if self._hatch:
gc.set_hatch(self._hatch)
try:
gc.set_hatch_color(self._hatch_color)
except AttributeError:
# if we end up with a GC that does not have this method
warnings.warn("Your backend does not support setting the "
"hatch color.")
if self.get_sketch_params() is not None:
gc.set_sketch_params(*self.get_sketch_params())
if self.get_path_effects():
from matplotlib.patheffects import PathEffectRenderer
renderer = PathEffectRenderer(self.get_path_effects(), renderer)
# If the collection is made up of a single shape/color/stroke,
# it can be rendered once and blitted multiple times, using
# `draw_markers` rather than `draw_path_collection`. This is
# *much* faster for Agg, and results in smaller file sizes in
# PDF/SVG/PS.
trans = self.get_transforms()
facecolors = self.get_facecolor()
edgecolors = self.get_edgecolor()
do_single_path_optimization = False
if (len(paths) == 1 and len(trans) <= 1 and
len(facecolors) == 1 and len(edgecolors) == 1 and
len(self._linewidths) == 1 and
self._linestyles == [(None, None)] and
len(self._antialiaseds) == 1 and len(self._urls) == 1 and
self.get_hatch() is None):
if len(trans):
combined_transform = (transforms.Affine2D(trans[0]) +
transform)
else:
combined_transform = transform
extents = paths[0].get_extents(combined_transform)
width, height = renderer.get_canvas_width_height()
if (extents.width < width and
extents.height < height):
do_single_path_optimization = True
if do_single_path_optimization:
gc.set_foreground(tuple(edgecolors[0]))
gc.set_linewidth(self._linewidths[0])
gc.set_dashes(*self._linestyles[0])
gc.set_antialiased(self._antialiaseds[0])
gc.set_url(self._urls[0])
renderer.draw_markers(
gc, paths[0], combined_transform.frozen(),
mpath.Path(offsets), transOffset, tuple(facecolors[0]))
else:
renderer.draw_path_collection(
gc, transform.frozen(), paths,
self.get_transforms(), offsets, transOffset,
self.get_facecolor(), self.get_edgecolor(),
self._linewidths, self._linestyles,
self._antialiaseds, self._urls,
self._offset_position)
gc.restore()
renderer.close_group(self.__class__.__name__)
self.stale = False
def set_pickradius(self, pr):
self._pickradius = pr
def get_pickradius(self):
return self._pickradius
def contains(self, mouseevent):
"""
Test whether the mouse event occurred in the collection.
Returns True | False, ``dict(ind=itemlist)``, where every
item in itemlist contains the event.
"""
if callable(self._contains):
return self._contains(self, mouseevent)
if not self.get_visible():
return False, {}
pickradius = (
float(self._picker)
if cbook.is_numlike(self._picker) and
self._picker is not True # the bool, not just nonzero or 1
else self._pickradius)
transform, transOffset, offsets, paths = self._prepare_points()
ind = _path.point_in_path_collection(
mouseevent.x, mouseevent.y, pickradius,
transform.frozen(), paths, self.get_transforms(),
offsets, transOffset, pickradius <= 0,
self.get_offset_position())
return len(ind) > 0, dict(ind=ind)
def set_urls(self, urls):
if urls is None:
self._urls = [None, ]
else:
self._urls = urls
self.stale = True
def get_urls(self):
return self._urls
def set_hatch(self, hatch):
r"""
Set the hatching pattern
*hatch* can be one of::
/ - diagonal hatching
\ - back diagonal
| - vertical
- - horizontal
+ - crossed
x - crossed diagonal
o - small circle
O - large circle
. - dots
* - stars
Letters can be combined, in which case all the specified
hatchings are done. If same letter repeats, it increases the
density of hatching of that pattern.
Hatching is supported in the PostScript, PDF, SVG and Agg
backends only.
Unlike other properties such as linewidth and colors, hatching
can only be specified for the collection as a whole, not separately
for each member.
ACCEPTS: [ '/' | '\\' | '|' | '-' | '+' | 'x' | 'o' | 'O' | '.' | '*' ]
"""
self._hatch = hatch
self.stale = True
def get_hatch(self):
'Return the current hatching pattern'
return self._hatch
def set_offsets(self, offsets):
"""
Set the offsets for the collection. *offsets* can be a scalar
or a sequence.
ACCEPTS: float or sequence of floats
"""
offsets = np.asanyarray(offsets, float)
#This decision is based on how they are initialized above
if self._uniform_offsets is None:
self._offsets = offsets
else:
self._uniform_offsets = offsets
self.stale = True
def get_offsets(self):
"""
Return the offsets for the collection.
"""
#This decision is based on how they are initialized above in __init__()
if self._uniform_offsets is None:
return self._offsets
else:
return self._uniform_offsets
def set_offset_position(self, offset_position):
"""
Set how offsets are applied. If *offset_position* is 'screen'
(default) the offset is applied after the master transform has
been applied, that is, the offsets are in screen coordinates.
If offset_position is 'data', the offset is applied before the
master transform, i.e., the offsets are in data coordinates.
"""
if offset_position not in ('screen', 'data'):
raise ValueError("offset_position must be 'screen' or 'data'")
self._offset_position = offset_position
self.stale = True
def get_offset_position(self):
"""
Returns how offsets are applied for the collection. If
*offset_position* is 'screen', the offset is applied after the
master transform has been applied, that is, the offsets are in
screen coordinates. If offset_position is 'data', the offset
is applied before the master transform, i.e., the offsets are
in data coordinates.
"""
return self._offset_position
def set_linewidth(self, lw):
"""
Set the linewidth(s) for the collection. *lw* can be a scalar
or a sequence; if it is a sequence the patches will cycle
through the sequence
ACCEPTS: float or sequence of floats
"""
if lw is None:
lw = mpl.rcParams['patch.linewidth']
if lw is None:
lw = mpl.rcParams['lines.linewidth']
# get the un-scaled/broadcast lw
self._us_lw = np.atleast_1d(np.asarray(lw))
# scale all of the dash patterns.
self._linewidths, self._linestyles = self._bcast_lwls(
self._us_lw, self._us_linestyles)
self.stale = True
def set_linewidths(self, lw):
"""alias for set_linewidth"""
return self.set_linewidth(lw)
def set_lw(self, lw):
"""alias for set_linewidth"""
return self.set_linewidth(lw)
def set_linestyle(self, ls):
"""
Set the linestyle(s) for the collection.
=========================== =================
linestyle description
=========================== =================
``'-'`` or ``'solid'`` solid line
``'--'`` or ``'dashed'`` dashed line
``'-.'`` or ``'dashdot'`` dash-dotted line
``':'`` or ``'dotted'`` dotted line
=========================== =================
Alternatively a dash tuple of the following form can be provided::
(offset, onoffseq),
where ``onoffseq`` is an even length tuple of on and off ink
in points.
ACCEPTS: ['solid' | 'dashed', 'dashdot', 'dotted' |
(offset, on-off-dash-seq) |
``'-'`` | ``'--'`` | ``'-.'`` | ``':'`` | ``'None'`` |
``' '`` | ``''``]
Parameters
----------
ls : { '-', '--', '-.', ':'} and more see description
The line style.
"""
try:
if isinstance(ls, six.string_types):
ls = cbook.ls_mapper.get(ls, ls)
dashes = [mlines._get_dash_pattern(ls)]
else:
try:
dashes = [mlines._get_dash_pattern(ls)]
except ValueError:
dashes = [mlines._get_dash_pattern(x) for x in ls]
except ValueError:
raise ValueError(
'Do not know how to convert {!r} to dashes'.format(ls))
# get the list of raw 'unscaled' dash patterns
self._us_linestyles = dashes
# broadcast and scale the lw and dash patterns
self._linewidths, self._linestyles = self._bcast_lwls(
self._us_lw, self._us_linestyles)
@staticmethod
def _bcast_lwls(linewidths, dashes):
'''Internal helper function to broadcast + scale ls/lw
In the collection drawing code the linewidth and linestyle are
cycled through as circular buffers (via v[i % len(v)]). Thus,
if we are going to scale the dash pattern at set time (not
draw time) we need to do the broadcasting now and expand both
lists to be the same length.
Parameters
----------
linewidths : list
line widths of collection
dashes : list
dash specification (offset, (dash pattern tuple))
Returns
-------
linewidths, dashes : list
Will be the same length, dashes are scaled by paired linewidth
'''
if mpl.rcParams['_internal.classic_mode']:
return linewidths, dashes
# make sure they are the same length so we can zip them
if len(dashes) != len(linewidths):
l_dashes = len(dashes)
l_lw = len(linewidths)
GCD = gcd(l_dashes, l_lw)
dashes = list(dashes) * (l_lw // GCD)
linewidths = list(linewidths) * (l_dashes // GCD)
# scale the dash patters
dashes = [mlines._scale_dashes(o, d, lw)
for (o, d), lw in zip(dashes, linewidths)]
return linewidths, dashes
def set_linestyles(self, ls):
"""alias for set_linestyle"""
return self.set_linestyle(ls)
def set_dashes(self, ls):
"""alias for set_linestyle"""
return self.set_linestyle(ls)
def set_antialiased(self, aa):
"""
Set the antialiasing state for rendering.
ACCEPTS: Boolean or sequence of booleans
"""
if aa is None:
aa = mpl.rcParams['patch.antialiased']
self._antialiaseds = np.atleast_1d(np.asarray(aa, bool))
self.stale = True
def set_antialiaseds(self, aa):
"""alias for set_antialiased"""
return self.set_antialiased(aa)
def set_color(self, c):
"""
Set both the edgecolor and the facecolor.
ACCEPTS: matplotlib color arg or sequence of rgba tuples
.. seealso::
:meth:`set_facecolor`, :meth:`set_edgecolor`
For setting the edge or face color individually.
"""
self.set_facecolor(c)
self.set_edgecolor(c)
def _set_facecolor(self, c):
if c is None:
c = mpl.rcParams['patch.facecolor']
self._is_filled = True
try:
if c.lower() == 'none':
self._is_filled = False
except AttributeError:
pass
self._facecolors = mcolors.to_rgba_array(c, self._alpha)
self.stale = True
def set_facecolor(self, c):
"""
Set the facecolor(s) of the collection. *c* can be a
matplotlib color spec (all patches have same color), or a
sequence of specs; if it is a sequence the patches will
cycle through the sequence.
If *c* is 'none', the patch will not be filled.
ACCEPTS: matplotlib color spec or sequence of specs
"""
self._original_facecolor = c
self._set_facecolor(c)
def set_facecolors(self, c):
"""alias for set_facecolor"""
return self.set_facecolor(c)
def get_facecolor(self):
return self._facecolors
get_facecolors = get_facecolor
def get_edgecolor(self):
if (isinstance(self._edgecolors, six.string_types)
and self._edgecolors == str('face')):
return self.get_facecolors()
else:
return self._edgecolors
get_edgecolors = get_edgecolor
def _set_edgecolor(self, c):
set_hatch_color = True
if c is None:
if (mpl.rcParams['patch.force_edgecolor'] or
not self._is_filled or self._edge_default):
c = mpl.rcParams['patch.edgecolor']
else:
c = 'none'
set_hatch_color = False
self._is_stroked = True
try:
if c.lower() == 'none':
self._is_stroked = False
except AttributeError:
pass
try:
if c.lower() == 'face': # Special case: lookup in "get" method.
self._edgecolors = 'face'
return
except AttributeError:
pass
self._edgecolors = mcolors.to_rgba_array(c, self._alpha)
if set_hatch_color and len(self._edgecolors):
self._hatch_color = tuple(self._edgecolors[0])
self.stale = True
def set_edgecolor(self, c):
"""
Set the edgecolor(s) of the collection. *c* can be a
matplotlib color spec (all patches have same color), or a
sequence of specs; if it is a sequence the patches will
cycle through the sequence.
If *c* is 'face', the edge color will always be the same as
the face color. If it is 'none', the patch boundary will not
be drawn.
ACCEPTS: matplotlib color spec or sequence of specs
"""
self._original_edgecolor = c
self._set_edgecolor(c)
def set_edgecolors(self, c):
"""alias for set_edgecolor"""
return self.set_edgecolor(c)
def set_alpha(self, alpha):
"""
Set the alpha tranparencies of the collection. *alpha* must be
a float or *None*.
ACCEPTS: float or None
"""
if alpha is not None:
try:
float(alpha)
except TypeError:
raise TypeError('alpha must be a float or None')
artist.Artist.set_alpha(self, alpha)
self._set_facecolor(self._original_facecolor)
self._set_edgecolor(self._original_edgecolor)
def get_linewidths(self):
return self._linewidths
get_linewidth = get_linewidths
def get_linestyles(self):
return self._linestyles
get_dashes = get_linestyle = get_linestyles
def update_scalarmappable(self):
"""
If the scalar mappable array is not none, update colors
from scalar data
"""
if self._A is None:
return
if self._A.ndim > 1:
raise ValueError('Collections can only map rank 1 arrays')
if not self.check_update("array"):
return
if self._is_filled:
self._facecolors = self.to_rgba(self._A, self._alpha)
elif self._is_stroked:
self._edgecolors = self.to_rgba(self._A, self._alpha)
self.stale = True
def get_fill(self):
'return whether fill is set'
return self._is_filled
def update_from(self, other):
'copy properties from other to self'
artist.Artist.update_from(self, other)
self._antialiaseds = other._antialiaseds
self._original_edgecolor = other._original_edgecolor
self._edgecolors = other._edgecolors
self._original_facecolor = other._original_facecolor
self._facecolors = other._facecolors
self._linewidths = other._linewidths
self._linestyles = other._linestyles
self._us_linestyles = other._us_linestyles
self._pickradius = other._pickradius
self._hatch = other._hatch
# update_from for scalarmappable
self._A = other._A
self.norm = other.norm
self.cmap = other.cmap
# self.update_dict = other.update_dict # do we need to copy this? -JJL
self.stale = True
# these are not available for the object inspector until after the
# class is built so we define an initial set here for the init
# function and they will be overridden after object defn
docstring.interpd.update(Collection="""\
Valid Collection keyword arguments:
* *edgecolors*: None
* *facecolors*: None
* *linewidths*: None
* *antialiaseds*: None
* *offsets*: None
* *transOffset*: transforms.IdentityTransform()
* *norm*: None (optional for
:class:`matplotlib.cm.ScalarMappable`)
* *cmap*: None (optional for
:class:`matplotlib.cm.ScalarMappable`)
*offsets* and *transOffset* are used to translate the patch after
rendering (default no offsets)
If any of *edgecolors*, *facecolors*, *linewidths*, *antialiaseds*
are None, they default to their :data:`matplotlib.rcParams` patch
setting, in sequence form.
""")
class _CollectionWithSizes(Collection):
"""
Base class for collections that have an array of sizes.
"""
_factor = 1.0
def get_sizes(self):
"""
Returns the sizes of the elements in the collection. The
value represents the 'area' of the element.
Returns
-------
sizes : array
The 'area' of each element.
"""
return self._sizes
def set_sizes(self, sizes, dpi=72.0):
"""
Set the sizes of each member of the collection.
Parameters
----------
sizes : ndarray or None
The size to set for each element of the collection. The
value is the 'area' of the element.
dpi : float
The dpi of the canvas. Defaults to 72.0.
"""
if sizes is None:
self._sizes = np.array([])
self._transforms = np.empty((0, 3, 3))
else:
self._sizes = np.asarray(sizes)
self._transforms = np.zeros((len(self._sizes), 3, 3))
scale = np.sqrt(self._sizes) * dpi / 72.0 * self._factor
self._transforms[:, 0, 0] = scale
self._transforms[:, 1, 1] = scale
self._transforms[:, 2, 2] = 1.0
self.stale = True
@allow_rasterization
def draw(self, renderer):
self.set_sizes(self._sizes, self.figure.dpi)
Collection.draw(self, renderer)
class PathCollection(_CollectionWithSizes):
"""
This is the most basic :class:`Collection` subclass.
"""
@docstring.dedent_interpd
def __init__(self, paths, sizes=None, **kwargs):
"""
*paths* is a sequence of :class:`matplotlib.path.Path`
instances.
%(Collection)s
"""
Collection.__init__(self, **kwargs)
self.set_paths(paths)
self.set_sizes(sizes)
self.stale = True
def set_paths(self, paths):
self._paths = paths
self.stale = True
def get_paths(self):
return self._paths
class PolyCollection(_CollectionWithSizes):
@docstring.dedent_interpd
def __init__(self, verts, sizes=None, closed=True, **kwargs):
"""
*verts* is a sequence of ( *verts0*, *verts1*, ...) where
*verts_i* is a sequence of *xy* tuples of vertices, or an
equivalent :mod:`numpy` array of shape (*nv*, 2).
*sizes* is *None* (default) or a sequence of floats that
scale the corresponding *verts_i*. The scaling is applied
before the Artist master transform; if the latter is an identity
transform, then the overall scaling is such that if
*verts_i* specify a unit square, then *sizes_i* is the area
of that square in points^2.
If len(*sizes*) < *nv*, the additional values will be
taken cyclically from the array.
*closed*, when *True*, will explicitly close the polygon.
%(Collection)s
"""
Collection.__init__(self, **kwargs)
self.set_sizes(sizes)
self.set_verts(verts, closed)
self.stale = True
def set_verts(self, verts, closed=True):
'''This allows one to delay initialization of the vertices.'''
if isinstance(verts, np.ma.MaskedArray):
verts = verts.astype(float).filled(np.nan)
# This is much faster than having Path do it one at a time.
if closed:
self._paths = []
for xy in verts:
if len(xy):
if isinstance(xy, np.ma.MaskedArray):
xy = np.ma.concatenate([xy, xy[0:1]])
else:
xy = np.asarray(xy)
xy = np.concatenate([xy, xy[0:1]])
codes = np.empty(xy.shape[0], dtype=mpath.Path.code_type)
codes[:] = mpath.Path.LINETO
codes[0] = mpath.Path.MOVETO
codes[-1] = mpath.Path.CLOSEPOLY
self._paths.append(mpath.Path(xy, codes))
else:
self._paths.append(mpath.Path(xy))
else:
self._paths = [mpath.Path(xy) for xy in verts]
self.stale = True
set_paths = set_verts
def set_verts_and_codes(self, verts, codes):
'''This allows one to initialize vertices with path codes.'''
if (len(verts) != len(codes)):
raise ValueError("'codes' must be a 1D list or array "
"with the same length of 'verts'")
self._paths = []
for xy, cds in zip(verts, codes):
if len(xy):
self._paths.append(mpath.Path(xy, cds))
else:
self._paths.append(mpath.Path(xy))
self.stale = True
class BrokenBarHCollection(PolyCollection):
"""
A collection of horizontal bars spanning *yrange* with a sequence of
*xranges*.
"""
@docstring.dedent_interpd
def __init__(self, xranges, yrange, **kwargs):
"""
*xranges*
sequence of (*xmin*, *xwidth*)
*yrange*
*ymin*, *ywidth*
%(Collection)s
"""
ymin, ywidth = yrange
ymax = ymin + ywidth
verts = [[(xmin, ymin),
(xmin, ymax),
(xmin + xwidth, ymax),
(xmin + xwidth, ymin),
(xmin, ymin)] for xmin, xwidth in xranges]
PolyCollection.__init__(self, verts, **kwargs)
@staticmethod
def span_where(x, ymin, ymax, where, **kwargs):
"""
Create a BrokenBarHCollection to plot horizontal bars from
over the regions in *x* where *where* is True. The bars range
on the y-axis from *ymin* to *ymax*
A :class:`BrokenBarHCollection` is returned. *kwargs* are
passed on to the collection.
"""
xranges = []
for ind0, ind1 in mlab.contiguous_regions(where):
xslice = x[ind0:ind1]
if not len(xslice):
continue
xranges.append((xslice[0], xslice[-1] - xslice[0]))
collection = BrokenBarHCollection(
xranges, [ymin, ymax - ymin], **kwargs)
return collection
class RegularPolyCollection(_CollectionWithSizes):
"""Draw a collection of regular polygons with *numsides*."""
_path_generator = mpath.Path.unit_regular_polygon
_factor = CIRCLE_AREA_FACTOR
@docstring.dedent_interpd
def __init__(self,
numsides,
rotation=0,
sizes=(1,),
**kwargs):
"""
*numsides*
the number of sides of the polygon
*rotation*