{{ message }}
-
-
Notifications
You must be signed in to change notification settings - Fork 35.4k
Expand file tree
/
Copy pathmulticall.py
More file actions
452 lines (405 loc) · 18.3 KB
/
Copy pathmulticall.py
File metadata and controls
452 lines (405 loc) · 18.3 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
"""
MultiCall - a class which inherits its methods from a Tkinter widget (Text, for
example), but enables multiple calls of functions per virtual event - all
matching events will be called, not only the most specific one. This is done
by wrapping the event functions - event_add, event_delete and event_info.
MultiCall recognizes only a subset of legal event sequences. Sequences which
are not recognized are treated by the original Tk handling mechanism. A
more-specific event will be called before a less-specific event.
The recognized sequences are complete one-event sequences (no emacs-style
Ctrl-X Ctrl-C, no shortcuts like <3>), for all types of events.
Key/Button Press/Release events can have modifiers.
The recognized modifiers are Shift, Control, Option and Command for Mac, and
Control, Alt, Shift, Meta/M for other platforms.
For all events which were handled by MultiCall, a new member is added to the
event instance passed to the binded functions - mc_type. This is one of the
event type constants defined in this module (such as MC_KEYPRESS).
For Key/Button events (which are handled by MultiCall and may receive
modifiers), another member is added - mc_state. This member gives the state
of the recognized modifiers, as a combination of the modifier constants
also defined in this module (for example, MC_SHIFT).
Using these members is absolutely portable.
The order by which events are called is defined by these rules:
1. A more-specific event will be called before a less-specific event.
2. A recently-binded event will be called before a previously-binded event,
unless this conflicts with the first rule.
Each function will be called at most once for each event.
"""
import re
import sys
import tkinter
# the event type constants, which define the meaning of mc_type
MC_KEYPRESS=0; MC_KEYRELEASE=1; MC_BUTTONPRESS=2; MC_BUTTONRELEASE=3;
MC_ACTIVATE=4; MC_CIRCULATE=5; MC_COLORMAP=6; MC_CONFIGURE=7;
MC_DEACTIVATE=8; MC_DESTROY=9; MC_ENTER=10; MC_EXPOSE=11; MC_FOCUSIN=12;
MC_FOCUSOUT=13; MC_GRAVITY=14; MC_LEAVE=15; MC_MAP=16; MC_MOTION=17;
MC_MOUSEWHEEL=18; MC_PROPERTY=19; MC_REPARENT=20; MC_UNMAP=21; MC_VISIBILITY=22;
# the modifier state constants, which define the meaning of mc_state
MC_SHIFT = 1<<0; MC_CONTROL = 1<<2; MC_ALT = 1<<3; MC_META = 1<<5
MC_OPTION = 1<<6; MC_COMMAND = 1<<7
# define the list of modifiers, to be used in complex event types.
if sys.platform == "darwin":
_modifiers = (("Shift",), ("Control",), ("Option",), ("Command",))
_modifier_masks = (MC_SHIFT, MC_CONTROL, MC_OPTION, MC_COMMAND)
else:
_modifiers = (("Control",), ("Alt",), ("Shift",), ("Meta", "M"))
_modifier_masks = (MC_CONTROL, MC_ALT, MC_SHIFT, MC_META)
# a dictionary to map a modifier name into its number
_modifier_names = {name: number
for number in range(len(_modifiers))
for name in _modifiers[number]}
# In 3.4, if no shell window is ever open, the underlying Tk widget is
# destroyed before .__del__ methods here are called. The following
# is used to selectively ignore shutdown exceptions to avoid
# 'Exception ignored' messages. See http://bugs.python.org/issue20167
APPLICATION_GONE = "application has been destroyed"
# A binder is a class which binds functions to one type of event. It has two
# methods: bind and unbind, which get a function and a parsed sequence, as
# returned by _parse_sequence(). There are two types of binders:
# _SimpleBinder handles event types with no modifiers and no detail.
# No Python functions are called when no events are binded.
# _ComplexBinder handles event types with modifiers and a detail.
# A Python function is called each time an event is generated.
class _SimpleBinder:
def __init__(self, type, widget, widgetinst):
self.type = type
self.sequence = '<'+_types[type][0]+'>'
self.widget = widget
self.widgetinst = widgetinst
self.bindedfuncs = []
self.handlerid = None
def bind(self, triplet, func):
if not self.handlerid:
def handler(event, l = self.bindedfuncs, mc_type = self.type):
event.mc_type = mc_type
wascalled = {}
for i in range(len(l)-1, -1, -1):
func = l[i]
if func not in wascalled:
wascalled[func] = True
r = func(event)
if r:
return r
self.handlerid = self.widget.bind(self.widgetinst,
self.sequence, handler)
self.bindedfuncs.append(func)
def unbind(self, triplet, func):
self.bindedfuncs.remove(func)
if not self.bindedfuncs:
self.widget.unbind(self.widgetinst, self.sequence, self.handlerid)
self.handlerid = None
def __del__(self):
if self.handlerid:
try:
self.widget.unbind(self.widgetinst, self.sequence,
self.handlerid)
except tkinter.TclError as e:
if not APPLICATION_GONE in e.args[0]:
raise
# An int in range(1 << len(_modifiers)) represents a combination of modifiers
# (if the least significant bit is on, _modifiers[0] is on, and so on).
# _state_subsets gives for each combination of modifiers, or *state*,
# a list of the states which are a subset of it. This list is ordered by the
# number of modifiers is the state - the most specific state comes first.
_states = range(1 << len(_modifiers))
_state_names = [''.join(m[0]+'-'
for i, m in enumerate(_modifiers)
if (1 << i) & s)
for s in _states]
def expand_substates(states):
'''For each item of states return a list containing all combinations of
that item with individual bits reset, sorted by the number of set bits.
'''
def nbits(n):
"number of bits set in n base 2"
nb = 0
while n:
n, rem = divmod(n, 2)
nb += rem
return nb
statelist = []
for state in states:
substates = list({state & x for x in states})
substates.sort(key=nbits, reverse=True)
statelist.append(substates)
return statelist
_state_subsets = expand_substates(_states)
# _state_codes gives for each state, the portable code to be passed as mc_state
_state_codes = []
for s in _states:
r = 0
for i in range(len(_modifiers)):
if (1 << i) & s:
r |= _modifier_masks[i]
_state_codes.append(r)
class _ComplexBinder:
# This class binds many functions, and only unbinds them when it is deleted.
# self.handlerids is the list of seqs and ids of binded handler functions.
# The binded functions sit in a dictionary of lists of lists, which maps
# a detail (or None) and a state into a list of functions.
# When a new detail is discovered, handlers for all the possible states
# are binded.
def __create_handler(self, lists, mc_type, mc_state):
def handler(event, lists = lists,
mc_type = mc_type, mc_state = mc_state,
ishandlerrunning = self.ishandlerrunning,
doafterhandler = self.doafterhandler):
ishandlerrunning[:] = [True]
event.mc_type = mc_type
event.mc_state = mc_state
wascalled = {}
r = None
for l in lists:
for i in range(len(l)-1, -1, -1):
func = l[i]
if func not in wascalled:
wascalled[func] = True
r = l[i](event)
if r:
break
if r:
break
ishandlerrunning[:] = []
# Call all functions in doafterhandler and remove them from list
for f in doafterhandler:
f()
doafterhandler[:] = []
if r:
return r
return handler
def __init__(self, type, widget, widgetinst):
self.type = type
self.typename = _types[type][0]
self.widget = widget
self.widgetinst = widgetinst
self.bindedfuncs = {None: [[] for s in _states]}
self.handlerids = []
# we don't want to change the lists of functions while a handler is
# running - it will mess up the loop and anyway, we usually want the
# change to happen from the next event. So we have a list of functions
# for the handler to run after it finishes calling the binded functions.
# It calls them only once.
# ishandlerrunning is a list. An empty one means no, otherwise - yes.
# this is done so that it would be mutable.
self.ishandlerrunning = []
self.doafterhandler = []
for s in _states:
lists = [self.bindedfuncs[None][i] for i in _state_subsets[s]]
handler = self.__create_handler(lists, type, _state_codes[s])
seq = '<'+_state_names[s]+self.typename+'>'
self.handlerids.append((seq, self.widget.bind(self.widgetinst,
seq, handler)))
def bind(self, triplet, func):
if triplet[2] not in self.bindedfuncs:
self.bindedfuncs[triplet[2]] = [[] for s in _states]
for s in _states:
lists = [ self.bindedfuncs[detail][i]
for detail in (triplet[2], None)
for i in _state_subsets[s] ]
handler = self.__create_handler(lists, self.type,
_state_codes[s])
seq = "<%s%s-%s>"% (_state_names[s], self.typename, triplet[2])
self.handlerids.append((seq, self.widget.bind(self.widgetinst,
seq, handler)))
doit = lambda: self.bindedfuncs[triplet[2]][triplet[0]].append(func)
if not self.ishandlerrunning:
doit()
else:
self.doafterhandler.append(doit)
def unbind(self, triplet, func):
doit = lambda: self.bindedfuncs[triplet[2]][triplet[0]].remove(func)
if not self.ishandlerrunning:
doit()
else:
self.doafterhandler.append(doit)
def __del__(self):
for seq, id in self.handlerids:
try:
self.widget.unbind(self.widgetinst, seq, id)
except tkinter.TclError as e:
if not APPLICATION_GONE in e.args[0]:
raise
# define the list of event types to be handled by MultiEvent. the order is
# compatible with the definition of event type constants.
_types = (
("KeyPress", "Key"), ("KeyRelease",), ("ButtonPress", "Button"),
("ButtonRelease",), ("Activate",), ("Circulate",), ("Colormap",),
("Configure",), ("Deactivate",), ("Destroy",), ("Enter",), ("Expose",),
("FocusIn",), ("FocusOut",), ("Gravity",), ("Leave",), ("Map",),
("Motion",), ("MouseWheel",), ("Property",), ("Reparent",), ("Unmap",),
("Visibility",),
)
# which binder should be used for every event type?
_binder_classes = (_ComplexBinder,) * 4 + (_SimpleBinder,) * (len(_types)-4)
# A dictionary to map a type name into its number
_type_names = {name: number
for number in range(len(_types))
for name in _types[number]}
_keysym_re = re.compile(r"^\w+$")
_button_re = re.compile(r"^[1-5]$")
def _parse_sequence(sequence):
"""Get a string which should describe an event sequence. If it is
successfully parsed as one, return a tuple containing the state (as an int),
the event type (as an index of _types), and the detail - None if none, or a
string if there is one. If the parsing is unsuccessful, return None.
"""
if not sequence or sequence[0] != '<' or sequence[-1] != '>':
return None
words = sequence[1:-1].split('-')
modifiers = 0
while words and words[0] in _modifier_names:
modifiers |= 1 << _modifier_names[words[0]]
del words[0]
if words and words[0] in _type_names:
type = _type_names[words[0]]
del words[0]
else:
return None
if _binder_classes[type] is _SimpleBinder:
if modifiers or words:
return None
else:
detail = None
else:
# _ComplexBinder
if type in [_type_names[s] for s in ("KeyPress", "KeyRelease")]:
type_re = _keysym_re
else:
type_re = _button_re
if not words:
detail = None
elif len(words) == 1 and type_re.match(words[0]):
detail = words[0]
else:
return None
return modifiers, type, detail
def _triplet_to_sequence(triplet):
if triplet[2]:
return '<'+_state_names[triplet[0]]+_types[triplet[1]][0]+'-'+ \
triplet[2]+'>'
else:
return '<'+_state_names[triplet[0]]+_types[triplet[1]][0]+'>'
_multicall_dict = {}
def MultiCallCreator(widget):
"""Return a MultiCall class which inherits its methods from the
given widget class (for example, Tkinter.Text). This is used
instead of a templating mechanism.
"""
if widget in _multicall_dict:
return _multicall_dict[widget]
class MultiCall (widget):
assert issubclass(widget, tkinter.Misc)
def __init__(self, *args, **kwargs):
widget.__init__(self, *args, **kwargs)
# a dictionary which maps a virtual event to a tuple with:
# 0. the function binded
# 1. a list of triplets - the sequences it is binded to
self.__eventinfo = {}
self.__binders = [_binder_classes[i](i, widget, self)
for i in range(len(_types))]
def bind(self, sequence=None, func=None, add=None):
#print("bind(%s, %s, %s)" % (sequence, func, add),
# file=sys.__stderr__)
if type(sequence) is str and len(sequence) > 2 and \
sequence[:2] == "<<" and sequence[-2:] == ">>":
if sequence in self.__eventinfo:
ei = self.__eventinfo[sequence]
if ei[0] is not None:
for triplet in ei[1]:
self.__binders[triplet[1]].unbind(triplet, ei[0])
ei[0] = func
if ei[0] is not None:
for triplet in ei[1]:
self.__binders[triplet[1]].bind(triplet, func)
else:
self.__eventinfo[sequence] = [func, []]
return widget.bind(self, sequence, func, add)
def unbind(self, sequence, funcid=None):
if type(sequence) is str and len(sequence) > 2 and \
sequence[:2] == "<<" and sequence[-2:] == ">>" and \
sequence in self.__eventinfo:
func, triplets = self.__eventinfo[sequence]
if func is not None:
for triplet in triplets:
self.__binders[triplet[1]].unbind(triplet, func)
self.__eventinfo[sequence][0] = None
return widget.unbind(self, sequence, funcid)
def event_add(self, virtual, *sequences):
#print("event_add(%s, %s)" % (repr(virtual), repr(sequences)),
# file=sys.__stderr__)
if virtual not in self.__eventinfo:
self.__eventinfo[virtual] = [None, []]
func, triplets = self.__eventinfo[virtual]
for seq in sequences:
triplet = _parse_sequence(seq)
if triplet is None:
#print("Tkinter event_add(%s)" % seq, file=sys.__stderr__)
widget.event_add(self, virtual, seq)
else:
if func is not None:
self.__binders[triplet[1]].bind(triplet, func)
triplets.append(triplet)
def event_delete(self, virtual, *sequences):
if virtual not in self.__eventinfo:
return
func, triplets = self.__eventinfo[virtual]
for seq in sequences:
triplet = _parse_sequence(seq)
if triplet is None:
#print("Tkinter event_delete: %s" % seq, file=sys.__stderr__)
widget.event_delete(self, virtual, seq)
elif triplet in triplets:
if func is not None:
self.__binders[triplet[1]].unbind(triplet, func)
triplets.remove(triplet)
# Else the sequence is not bound; ignore it (gh-89360).
def event_info(self, virtual=None):
if virtual is None or virtual not in self.__eventinfo:
return widget.event_info(self, virtual)
else:
return tuple(map(_triplet_to_sequence,
self.__eventinfo[virtual][1])) + \
widget.event_info(self, virtual)
def __del__(self):
for virtual in self.__eventinfo:
func, triplets = self.__eventinfo[virtual]
if func:
for triplet in triplets:
try:
self.__binders[triplet[1]].unbind(triplet, func)
except tkinter.TclError as e:
if not APPLICATION_GONE in e.args[0]:
raise
_multicall_dict[widget] = MultiCall
return MultiCall
def _multi_call(parent): # htest #
top = tkinter.Toplevel(parent)
top.title("Test MultiCall")
x, y = map(int, parent.geometry().split('+')[1:])
top.geometry("+%d+%d" % (x, y + 175))
text = MultiCallCreator(tkinter.Text)(top)
text.pack()
text.focus_set()
def bindseq(seq, n=[0]):
def handler(event):
print(seq)
text.bind("<<handler%d>>"%n[0], handler)
text.event_add("<<handler%d>>"%n[0], seq)
n[0] += 1
bindseq("<Key>")
bindseq("<Control-Key>")
bindseq("<Alt-Key-a>")
bindseq("<Control-Key-a>")
bindseq("<Alt-Control-Key-a>")
bindseq("<Key-b>")
bindseq("<Control-Button-1>")
bindseq("<Button-2>")
bindseq("<Alt-Button-1>")
bindseq("<FocusOut>")
bindseq("<Enter>")
bindseq("<Leave>")
if __name__ == "__main__":
from unittest import main
main('idlelib.idle_test.test_mainmenu', verbosity=2, exit=False)
from idlelib.idle_test.htest import run
run(_multi_call)
You can’t perform that action at this time.