forked from matplotlib/matplotlib
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathwidgets.py
More file actions
2597 lines (2078 loc) · 81.7 KB
/
widgets.py
File metadata and controls
2597 lines (2078 loc) · 81.7 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
"""
GUI neutral widgets
===================
Widgets that are designed to work for any of the GUI backends.
All of these widgets require you to predefine a :class:`matplotlib.axes.Axes`
instance and pass that as the first arg. matplotlib doesn't try to
be too smart with respect to layout -- you will have to figure out how
wide and tall you want your Axes to be to accommodate your widget.
"""
from __future__ import (absolute_import, division, print_function,
unicode_literals)
import copy
import six
from six.moves import zip
import numpy as np
from matplotlib import rcParams
from .mlab import dist
from .patches import Circle, Rectangle, Ellipse
from .lines import Line2D
from .transforms import blended_transform_factory
class LockDraw(object):
"""
Some widgets, like the cursor, draw onto the canvas, and this is not
desirable under all circumstances, like when the toolbar is in
zoom-to-rect mode and drawing a rectangle. The module level "lock"
allows someone to grab the lock and prevent other widgets from
drawing. Use ``matplotlib.widgets.lock(someobj)`` to prevent
other widgets from drawing while you're interacting with the canvas.
"""
def __init__(self):
self._owner = None
def __call__(self, o):
"""reserve the lock for *o*"""
if not self.available(o):
raise ValueError('already locked')
self._owner = o
def release(self, o):
"""release the lock"""
if not self.available(o):
raise ValueError('you do not own this lock')
self._owner = None
def available(self, o):
"""drawing is available to *o*"""
return not self.locked() or self.isowner(o)
def isowner(self, o):
"""Return True if *o* owns this lock"""
return self._owner is o
def locked(self):
"""Return True if the lock is currently held by an owner"""
return self._owner is not None
class Widget(object):
"""
Abstract base class for GUI neutral widgets
"""
drawon = True
eventson = True
_active = True
def set_active(self, active):
"""Set whether the widget is active.
"""
self._active = active
def get_active(self):
"""Get whether the widget is active.
"""
return self._active
# set_active is overriden by SelectorWidgets.
active = property(get_active, lambda self, active: self.set_active(active),
doc="Is the widget active?")
def ignore(self, event):
"""Return True if event should be ignored.
This method (or a version of it) should be called at the beginning
of any event callback.
"""
return not self.active
class AxesWidget(Widget):
"""Widget that is connected to a single
:class:`~matplotlib.axes.Axes`.
To guarantee that the widget remains responsive and not garbage-collected,
a reference to the object should be maintained by the user.
This is necessary because the callback registry
maintains only weak-refs to the functions, which are member
functions of the widget. If there are no references to the widget
object it may be garbage collected which will disconnect the
callbacks.
Attributes:
*ax* : :class:`~matplotlib.axes.Axes`
The parent axes for the widget
*canvas* : :class:`~matplotlib.backend_bases.FigureCanvasBase` subclass
The parent figure canvas for the widget.
*active* : bool
If False, the widget does not respond to events.
"""
def __init__(self, ax):
self.ax = ax
self.canvas = ax.figure.canvas
self.cids = []
def connect_event(self, event, callback):
"""Connect callback with an event.
This should be used in lieu of `figure.canvas.mpl_connect` since this
function stores callback ids for later clean up.
"""
cid = self.canvas.mpl_connect(event, callback)
self.cids.append(cid)
def disconnect_events(self):
"""Disconnect all events created by this widget."""
for c in self.cids:
self.canvas.mpl_disconnect(c)
class Button(AxesWidget):
"""
A GUI neutral button.
For the button to remain responsive you must keep a reference to it.
The following attributes are accessible
*ax*
The :class:`matplotlib.axes.Axes` the button renders into.
*label*
A :class:`matplotlib.text.Text` instance.
*color*
The color of the button when not hovering.
*hovercolor*
The color of the button when hovering.
Call :meth:`on_clicked` to connect to the button
"""
def __init__(self, ax, label, image=None,
color='0.85', hovercolor='0.95'):
"""
Parameters
----------
ax : matplotlib.axes.Axes
The :class:`matplotlib.axes.Axes` instance the button
will be placed into.
label : str
The button text. Accepts string.
image : array, mpl image, Pillow Image
The image to place in the button, if not *None*.
Can be any legal arg to imshow (numpy array,
matplotlib Image instance, or Pillow Image).
color : color
The color of the button when not activated
hovercolor : color
The color of the button when the mouse is over it
"""
AxesWidget.__init__(self, ax)
if image is not None:
ax.imshow(image)
self.label = ax.text(0.5, 0.5, label,
verticalalignment='center',
horizontalalignment='center',
transform=ax.transAxes)
self.cnt = 0
self.observers = {}
self.connect_event('button_press_event', self._click)
self.connect_event('button_release_event', self._release)
self.connect_event('motion_notify_event', self._motion)
ax.set_navigate(False)
ax.set_facecolor(color)
ax.set_xticks([])
ax.set_yticks([])
self.color = color
self.hovercolor = hovercolor
self._lastcolor = color
def _click(self, event):
if self.ignore(event):
return
if event.inaxes != self.ax:
return
if not self.eventson:
return
if event.canvas.mouse_grabber != self.ax:
event.canvas.grab_mouse(self.ax)
def _release(self, event):
if self.ignore(event):
return
if event.canvas.mouse_grabber != self.ax:
return
event.canvas.release_mouse(self.ax)
if not self.eventson:
return
if event.inaxes != self.ax:
return
for cid, func in six.iteritems(self.observers):
func(event)
def _motion(self, event):
if self.ignore(event):
return
if event.inaxes == self.ax:
c = self.hovercolor
else:
c = self.color
if c != self._lastcolor:
self.ax.set_facecolor(c)
self._lastcolor = c
if self.drawon:
self.ax.figure.canvas.draw()
def on_clicked(self, func):
"""
When the button is clicked, call this *func* with event.
A connection id is returned. It can be used to disconnect
the button from its callback.
"""
cid = self.cnt
self.observers[cid] = func
self.cnt += 1
return cid
def disconnect(self, cid):
"""remove the observer with connection id *cid*"""
try:
del self.observers[cid]
except KeyError:
pass
class Slider(AxesWidget):
"""
A slider representing a floating point range.
For the slider to remain responsive you must maintain a
reference to it.
The following attributes are defined
*ax* : the slider :class:`matplotlib.axes.Axes` instance
*val* : the current slider value
*vline* : a :class:`matplotlib.lines.Line2D` instance
representing the initial value of the slider
*poly* : A :class:`matplotlib.patches.Polygon` instance
which is the slider knob
*valfmt* : the format string for formatting the slider text
*label* : a :class:`matplotlib.text.Text` instance
for the slider label
*closedmin* : whether the slider is closed on the minimum
*closedmax* : whether the slider is closed on the maximum
*slidermin* : another slider - if not *None*, this slider must be
greater than *slidermin*
*slidermax* : another slider - if not *None*, this slider must be
less than *slidermax*
*dragging* : allow for mouse dragging on slider
Call :meth:`on_changed` to connect to the slider event
"""
def __init__(self, ax, label, valmin, valmax, valinit=0.5, valfmt='%1.2f',
closedmin=True, closedmax=True, slidermin=None,
slidermax=None, dragging=True, **kwargs):
"""
Create a slider from *valmin* to *valmax* in axes *ax*.
Additional kwargs are passed on to ``self.poly`` which is the
:class:`matplotlib.patches.Rectangle` that draws the slider
knob. See the :class:`matplotlib.patches.Rectangle` documentation for
valid property names (e.g., *facecolor*, *edgecolor*, *alpha*, ...).
Parameters
----------
ax : Axes
The Axes to put the slider in
label : str
Slider label
valmin : float
The minimum value of the slider
valmax : float
The maximum value of the slider
valinit : float
The slider initial position
label : str
The slider label
valfmt : str
Used to format the slider value, fprint format string
closedmin : bool
Indicate whether the slider interval is closed on the bottom
closedmax : bool
Indicate whether the slider interval is closed on the top
slidermin : Slider or None
Do not allow the current slider to have a value less than
`slidermin`
slidermax : Slider or None
Do not allow the current slider to have a value greater than
`slidermax`
dragging : bool
if the slider can be dragged by the mouse
"""
AxesWidget.__init__(self, ax)
self.valmin = valmin
self.valmax = valmax
self.val = valinit
self.valinit = valinit
self.poly = ax.axvspan(valmin, valinit, 0, 1, **kwargs)
self.vline = ax.axvline(valinit, 0, 1, color='r', lw=1)
self.valfmt = valfmt
ax.set_yticks([])
ax.set_xlim((valmin, valmax))
ax.set_xticks([])
ax.set_navigate(False)
self.connect_event('button_press_event', self._update)
self.connect_event('button_release_event', self._update)
if dragging:
self.connect_event('motion_notify_event', self._update)
self.label = ax.text(-0.02, 0.5, label, transform=ax.transAxes,
verticalalignment='center',
horizontalalignment='right')
self.valtext = ax.text(1.02, 0.5, valfmt % valinit,
transform=ax.transAxes,
verticalalignment='center',
horizontalalignment='left')
self.cnt = 0
self.observers = {}
self.closedmin = closedmin
self.closedmax = closedmax
self.slidermin = slidermin
self.slidermax = slidermax
self.drag_active = False
def _update(self, event):
"""update the slider position"""
if self.ignore(event):
return
if event.button != 1:
return
if event.name == 'button_press_event' and event.inaxes == self.ax:
self.drag_active = True
event.canvas.grab_mouse(self.ax)
if not self.drag_active:
return
elif ((event.name == 'button_release_event') or
(event.name == 'button_press_event' and
event.inaxes != self.ax)):
self.drag_active = False
event.canvas.release_mouse(self.ax)
return
val = event.xdata
if val <= self.valmin:
if not self.closedmin:
return
val = self.valmin
elif val >= self.valmax:
if not self.closedmax:
return
val = self.valmax
if self.slidermin is not None and val <= self.slidermin.val:
if not self.closedmin:
return
val = self.slidermin.val
if self.slidermax is not None and val >= self.slidermax.val:
if not self.closedmax:
return
val = self.slidermax.val
self.set_val(val)
def set_val(self, val):
xy = self.poly.xy
xy[2] = val, 1
xy[3] = val, 0
self.poly.xy = xy
self.valtext.set_text(self.valfmt % val)
if self.drawon:
self.ax.figure.canvas.draw_idle()
self.val = val
if not self.eventson:
return
for cid, func in six.iteritems(self.observers):
func(val)
def on_changed(self, func):
"""
When the slider value is changed, call *func* with the new
slider position
A connection id is returned which can be used to disconnect
"""
cid = self.cnt
self.observers[cid] = func
self.cnt += 1
return cid
def disconnect(self, cid):
"""remove the observer with connection id *cid*"""
try:
del self.observers[cid]
except KeyError:
pass
def reset(self):
"""reset the slider to the initial value if needed"""
if (self.val != self.valinit):
self.set_val(self.valinit)
class CheckButtons(AxesWidget):
"""
A GUI neutral set of check buttons.
For the check buttons to remain responsive you must keep a
reference to this object.
The following attributes are exposed
*ax*
The :class:`matplotlib.axes.Axes` instance the buttons are
located in
*labels*
List of :class:`matplotlib.text.Text` instances
*lines*
List of (line1, line2) tuples for the x's in the check boxes.
These lines exist for each box, but have ``set_visible(False)``
when its box is not checked.
*rectangles*
List of :class:`matplotlib.patches.Rectangle` instances
Connect to the CheckButtons with the :meth:`on_clicked` method
"""
def __init__(self, ax, labels, actives):
"""
Add check buttons to :class:`matplotlib.axes.Axes` instance *ax*
*labels*
A len(buttons) list of labels as strings
*actives*
A len(buttons) list of booleans indicating whether
the button is active
"""
AxesWidget.__init__(self, ax)
ax.set_xticks([])
ax.set_yticks([])
ax.set_navigate(False)
if len(labels) > 1:
dy = 1. / (len(labels) + 1)
ys = np.linspace(1 - dy, dy, len(labels))
else:
dy = 0.25
ys = [0.5]
cnt = 0
axcolor = ax.get_facecolor()
self.labels = []
self.lines = []
self.rectangles = []
lineparams = {'color': 'k', 'linewidth': 1.25,
'transform': ax.transAxes, 'solid_capstyle': 'butt'}
for y, label in zip(ys, labels):
t = ax.text(0.25, y, label, transform=ax.transAxes,
horizontalalignment='left',
verticalalignment='center')
w, h = dy / 2., dy / 2.
x, y = 0.05, y - h / 2.
p = Rectangle(xy=(x, y), width=w, height=h,
facecolor=axcolor,
transform=ax.transAxes)
l1 = Line2D([x, x + w], [y + h, y], **lineparams)
l2 = Line2D([x, x + w], [y, y + h], **lineparams)
l1.set_visible(actives[cnt])
l2.set_visible(actives[cnt])
self.labels.append(t)
self.rectangles.append(p)
self.lines.append((l1, l2))
ax.add_patch(p)
ax.add_line(l1)
ax.add_line(l2)
cnt += 1
self.connect_event('button_press_event', self._clicked)
self.cnt = 0
self.observers = {}
def _clicked(self, event):
if self.ignore(event):
return
if event.button != 1:
return
if event.inaxes != self.ax:
return
for i, (p, t) in enumerate(zip(self.rectangles, self.labels)):
if (t.get_window_extent().contains(event.x, event.y) or
p.get_window_extent().contains(event.x, event.y)):
self.set_active(i)
break
else:
return
def set_active(self, index):
"""
Directly (de)activate a check button by index.
*index* is an index into the original label list
that this object was constructed with.
Raises ValueError if *index* is invalid.
Callbacks will be triggered if :attr:`eventson` is True.
"""
if 0 > index >= len(self.labels):
raise ValueError("Invalid CheckButton index: %d" % index)
l1, l2 = self.lines[index]
l1.set_visible(not l1.get_visible())
l2.set_visible(not l2.get_visible())
if self.drawon:
self.ax.figure.canvas.draw()
if not self.eventson:
return
for cid, func in six.iteritems(self.observers):
func(self.labels[index].get_text())
def get_status(self):
"""
returns a tuple of the status (True/False) of all of the check buttons
"""
return [l1.get_visible() for (l1, l2) in self.lines]
def on_clicked(self, func):
"""
When the button is clicked, call *func* with button label
A connection id is returned which can be used to disconnect
"""
cid = self.cnt
self.observers[cid] = func
self.cnt += 1
return cid
def disconnect(self, cid):
"""remove the observer with connection id *cid*"""
try:
del self.observers[cid]
except KeyError:
pass
class TextBox(AxesWidget):
"""
A GUI neutral text input box.
For the text box to remain responsive you must keep a reference to it.
The following attributes are accessible:
*ax*
The :class:`matplotlib.axes.Axes` the button renders into.
*label*
A :class:`matplotlib.text.Text` instance.
*color*
The color of the text box when not hovering.
*hovercolor*
The color of the text box when hovering.
Call :meth:`on_text_change` to be updated whenever the text changes.
Call :meth:`on_submit` to be updated whenever the user hits enter or
leaves the text entry field.
"""
def __init__(self, ax, label, initial='',
color='.95', hovercolor='1', label_pad=.01):
"""
Parameters
----------
ax : matplotlib.axes.Axes
The :class:`matplotlib.axes.Axes` instance the button
will be placed into.
label : str
Label for this text box. Accepts string.
initial : str
Initial value in the text box
color : color
The color of the box
hovercolor : color
The color of the box when the mouse is over it
label_pad : float
the distance between the label and the right side of the textbox
"""
AxesWidget.__init__(self, ax)
self.DIST_FROM_LEFT = .05
self.params_to_disable = []
for key in rcParams.keys():
if u'keymap' in key:
self.params_to_disable += [key]
self.text = initial
self.label = ax.text(-label_pad, 0.5, label,
verticalalignment='center',
horizontalalignment='right',
transform=ax.transAxes)
self.text_disp = self._make_text_disp(self.text)
self.cnt = 0
self.change_observers = {}
self.submit_observers = {}
# If these lines are removed, the cursor won't appear the first
# time the box is clicked:
self.ax.set_xlim(0, 1)
self.ax.set_ylim(0, 1)
self.cursor_index = 0
# Because this is initialized, _render_cursor
# can assume that cursor exists.
self.cursor = self.ax.vlines(0, 0, 0)
self.cursor.set_visible(False)
self.connect_event('button_press_event', self._click)
self.connect_event('button_release_event', self._release)
self.connect_event('motion_notify_event', self._motion)
self.connect_event('key_press_event', self._keypress)
self.connect_event('resize_event', self._resize)
ax.set_navigate(False)
ax.set_facecolor(color)
ax.set_xticks([])
ax.set_yticks([])
self.color = color
self.hovercolor = hovercolor
self._lastcolor = color
self.capturekeystrokes = False
def _make_text_disp(self, string):
return self.ax.text(self.DIST_FROM_LEFT, 0.5, string,
verticalalignment='center',
horizontalalignment='left',
transform=self.ax.transAxes)
def _rendercursor(self):
# this is a hack to figure out where the cursor should go.
# we draw the text up to where the cursor should go, measure
# and save its dimensions, draw the real text, then put the cursor
# at the saved dimensions
widthtext = self.text[:self.cursor_index]
no_text = False
if(widthtext == "" or widthtext == " " or widthtext == " "):
no_text = widthtext == ""
widthtext = ","
wt_disp = self._make_text_disp(widthtext)
self.ax.figure.canvas.draw()
bb = wt_disp.get_window_extent()
inv = self.ax.transData.inverted()
bb = inv.transform(bb)
wt_disp.set_visible(False)
if no_text:
bb[1, 0] = bb[0, 0]
# hack done
self.cursor.set_visible(False)
self.cursor = self.ax.vlines(bb[1, 0], bb[0, 1], bb[1, 1])
self.ax.figure.canvas.draw()
def _notify_submit_observers(self):
for cid, func in six.iteritems(self.submit_observers):
func(self.text)
def _release(self, event):
if self.ignore(event):
return
if event.canvas.mouse_grabber != self.ax:
return
event.canvas.release_mouse(self.ax)
def _keypress(self, event):
if self.ignore(event):
return
if self.capturekeystrokes:
key = event.key
if(len(key) == 1):
self.text = (self.text[:self.cursor_index] + key +
self.text[self.cursor_index:])
self.cursor_index += 1
elif key == "right":
if self.cursor_index != len(self.text):
self.cursor_index += 1
elif key == "left":
if self.cursor_index != 0:
self.cursor_index -= 1
elif key == "home":
self.cursor_index = 0
elif key == "end":
self.cursor_index = len(self.text)
elif(key == "backspace"):
if self.cursor_index != 0:
self.text = (self.text[:self.cursor_index - 1] +
self.text[self.cursor_index:])
self.cursor_index -= 1
elif(key == "delete"):
if self.cursor_index != len(self.text):
self.text = (self.text[:self.cursor_index] +
self.text[self.cursor_index + 1:])
self.text_disp.remove()
self.text_disp = self._make_text_disp(self.text)
self._rendercursor()
self._notify_change_observers()
if key == "enter":
self._notify_submit_observers()
def set_val(self, val):
newval = str(val)
if self.text == newval:
return
self.text = newval
self.text_disp.remove()
self.text_disp = self._make_text_disp(self.text)
self._rendercursor()
self._notify_change_observers()
self._notify_submit_observers()
def _notify_change_observers(self):
for cid, func in six.iteritems(self.change_observers):
func(self.text)
def begin_typing(self, x):
self.capturekeystrokes = True
# disable command keys so that the user can type without
# command keys causing figure to be saved, etc
self.reset_params = {}
for key in self.params_to_disable:
self.reset_params[key] = rcParams[key]
rcParams[key] = []
def stop_typing(self):
notifysubmit = False
# because _notify_submit_users might throw an error in the
# user's code, we only want to call it once we've already done
# our cleanup.
if self.capturekeystrokes:
# since the user is no longer typing,
# reactivate the standard command keys
for key in self.params_to_disable:
rcParams[key] = self.reset_params[key]
notifysubmit = True
self.capturekeystrokes = False
self.cursor.set_visible(False)
self.ax.figure.canvas.draw()
if notifysubmit:
self._notify_submit_observers()
def position_cursor(self, x):
# now, we have to figure out where the cursor goes.
# approximate it based on assuming all characters the same length
if len(self.text) == 0:
self.cursor_index = 0
else:
bb = self.text_disp.get_window_extent()
trans = self.ax.transData
inv = self.ax.transData.inverted()
bb = trans.transform(inv.transform(bb))
text_start = bb[0, 0]
text_end = bb[1, 0]
ratio = (x - text_start) / (text_end - text_start)
if ratio < 0:
ratio = 0
if ratio > 1:
ratio = 1
self.cursor_index = int(len(self.text) * ratio)
self._rendercursor()
def _click(self, event):
if self.ignore(event):
return
if event.inaxes != self.ax:
self.capturekeystrokes = False
self.stop_typing()
return
if not self.eventson:
return
if event.canvas.mouse_grabber != self.ax:
event.canvas.grab_mouse(self.ax)
if not(self.capturekeystrokes):
self.begin_typing(event.x)
self.position_cursor(event.x)
def _resize(self, event):
self.stop_typing()
def _motion(self, event):
if self.ignore(event):
return
if event.inaxes == self.ax:
c = self.hovercolor
else:
c = self.color
if c != self._lastcolor:
self.ax.set_facecolor(c)
self._lastcolor = c
if self.drawon:
self.ax.figure.canvas.draw()
def on_text_change(self, func):
"""
When the text changes, call this *func* with event.
A connection id is returned which can be used to disconnect.
"""
cid = self.cnt
self.change_observers[cid] = func
self.cnt += 1
return cid
def on_submit(self, func):
"""
When the user hits enter or leaves the submision box, call this
*func* with event.
A connection id is returned which can be used to disconnect.
"""
cid = self.cnt
self.submit_observers[cid] = func
self.cnt += 1
return cid
def disconnect(self, cid):
"""remove the observer with connection id *cid*"""
try:
del self.observers[cid]
except KeyError:
pass
class RadioButtons(AxesWidget):
"""
A GUI neutral radio button.
For the buttons to remain responsive
you must keep a reference to this object.
The following attributes are exposed:
*ax*
The :class:`matplotlib.axes.Axes` instance the buttons are in
*activecolor*
The color of the button when clicked
*labels*
A list of :class:`matplotlib.text.Text` instances
*circles*
A list of :class:`matplotlib.patches.Circle` instances
*value_selected*
A string listing the current value selected
Connect to the RadioButtons with the :meth:`on_clicked` method
"""
def __init__(self, ax, labels, active=0, activecolor='blue'):
"""
Add radio buttons to :class:`matplotlib.axes.Axes` instance *ax*
*labels*
A len(buttons) list of labels as strings
*active*
The index into labels for the button that is active
*activecolor*
The color of the button when clicked
"""
AxesWidget.__init__(self, ax)
self.activecolor = activecolor
self.value_selected = None
ax.set_xticks([])
ax.set_yticks([])
ax.set_navigate(False)
dy = 1. / (len(labels) + 1)
ys = np.linspace(1 - dy, dy, len(labels))
cnt = 0
axcolor = ax.get_facecolor()
self.labels = []
self.circles = []
for y, label in zip(ys, labels):
t = ax.text(0.25, y, label, transform=ax.transAxes,
horizontalalignment='left',
verticalalignment='center')
if cnt == active:
self.value_selected = label
facecolor = activecolor