from __future__ import print_function
import sys
import collections
import functools
_handlers = collections.defaultdict(list)
def _run_handlers(list_of_handlers, event):
exc_info = None
for func in list_of_handlers:
try:
func(event)
except SystemExit:
exc_info = sys.exc_info()
except:
import traceback
print("Error in global_binding._run_handlers:", file=sys.stderr)
traceback.print_exc()
exc_info = sys.exc_info()
if exc_info is not None:
raise exc_info[0], exc_info[1], exc_info[2]
def global_bind(w, event, func, add=None):
root = w.nametowidget(".")
handlers_of_event = _handlers[event]
if len(handlers_of_event) == 0:
root.bind_all(event, functools.partial(_run_handlers, handlers_of_event))
if add == "+":
handlers_of_event.append(func)
else:
handlers_of_event[:] = [func]
return func
def global_unbind(w, event, func):
handlers_of_event = _handlers[event]
handlers_of_event.remove(func)
if len(handlers_of_event) == 0:
w.unbind_all(event)
if __name__ == "__main__":
try:
from Tkinter import Tk, Frame
except ImportError:
from tkinter import Tk, Frame
root = Tk()
f = Frame(root, width= 300, height=300)
f.pack()
def callback1(event):
print("callback1")
def callback2(event):
print("callback2")
def callback3(event):
print("callback3")
global_bind(root, "<1>", callback1, add="+")
global_bind(f, "<1>", callback2, add="+")
global_bind(f, "<1>", callback3, add="+")
global_unbind(f, "<1>", callback1)
root.mainloop()
Diff to Previous Revision
--- revision 2 2017-05-05 20:31:45
+++ revision 3 2017-05-05 20:33:31
@@ -38,9 +38,10 @@
return func
def global_unbind(w, event, func):
- _handlers[event].remove(func)
+ handlers_of_event = _handlers[event]
+ handlers_of_event.remove(func)
- if len(_handlers[event]) == 0:
+ if len(handlers_of_event) == 0:
w.unbind_all(event)
if __name__ == "__main__":
