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
|
""" Demonstration of the Pmw interface to the blt busy command.
"""
# Import Pmw from the sibling directory.
import sys
sys.path[:0] = ['../../..']
import Tkinter
import Pmw
class Demo:
def __init__(self, parent):
self.parent = parent
if Pmw.Blt.haveblt(parent):
text = 'Click here to show the\nbusy cursor for one second.'
else:
text = 'Sorry\nThe BLT package has not been\n' + \
'installed on this system.\n' + \
'Clicking on this button will\n' + \
'pause for one second but will\n' + \
'not display the busy cursor.'
button = Tkinter.Button(parent,
text = text,
command = Pmw.busycallback(self.sleep, parent.update))
button.pack(padx = 10, pady = 10)
entry = Tkinter.Entry(parent, width = 30)
entry.insert('end', 'Try to enter some text while busy.')
entry.pack(padx = 10, pady = 10)
def sleep(self):
self.parent.after(1000)
######################################################################
# Create demo in root window for testing.
if __name__ == '__main__':
root = Tkinter.Tk()
Pmw.initialise(root, fontScheme = 'pmw1')
root.title('Busy cursor demonstration')
exitButton = Tkinter.Button(root, text = 'Exit', command = root.destroy)
exitButton.pack(side = 'bottom')
widget = Demo(root)
root.mainloop()
|
