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
| #!/usr/bin/env python3
# -*- coding: utf-8 -*-
import tkinter as TK
class tkTimer (TK.Frame):
def __init__ (self, master=None, delay=100, callback=None, *args, **kw):
# superclass inits
TK.Frame.__init__(self, master)
# member inits
self.master = master
self.delay = delay
self.callback = callback
self.args = args
self.kw = kw
self.tid = 0
self.started = False
# end def
def start (self):
if not self.started:
self.started = True
self.__tick()
# end if
# end def
def stop (self):
self.after_cancel(self.tid)
self.tid = 0
self.started = False
# end def
def __tick (self):
if callable(self.callback):
self.callback(*self.args, **self.kw)
self.tid = self.after(self.delay, self.__tick)
# end if
# end def
# end class tkTimer
# ---------------------------- ZONE DEMO -------------------------------
def update_clock ():
_hours = ticks // 3600
_minutes = (ticks // 60) % 60
_seconds = ticks % 60
cvar_clock.set(
"{HH:02d}:{MM:02d}:{SS:02d}"
.format(HH=_hours, MM=_minutes, SS=_seconds)
)
# end def
def run_clock ():
global ticks
update_clock()
ticks += 1
# end def
def demo ():
global root, timer, ticks, cvar_clock
root = TK.Tk()
root.title("tkTimer demo")
timer = tkTimer(root, delay=1000, callback=run_clock)
ticks = 0
cvar_clock = TK.StringVar()
TK.Label(root, textvariable=cvar_clock, font="sans 36 bold").pack(padx=5, pady=5)
TK.Button(root, text="Start", command=timer.start).pack(side=TK.LEFT, padx=5, pady=5)
TK.Button(root, text="Stop", command=timer.stop).pack(side=TK.LEFT, padx=5, pady=5)
TK.Button(root, text="Quit", command=root.destroy).pack(side=TK.RIGHT, padx=5, pady=5)
update_clock()
root.mainloop()
# end def
if __name__ == "__main__":
demo()
# end if |
