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#! /usr/bin/python2.7
# A Python function that generates dialog boxes with a text message,
# optional bitmap, and any number of buttons.
# Cf. Ousterhout, Tcl and the Tk Toolkit, Figs. 27.2-3, pp. 269-270.
from Tkinter import *
import sys
def dialog(master, title, text, bitmap, default, *args):
# 1. Create the top-level window and divide it into top
# and bottom parts.
w = Toplevel(master, class_='Dialog')
w.title(title)
w.iconname('Dialog')
top = Frame(w, relief=RAISED, borderwidth=1)
top.pack(side=TOP, fill=BOTH)
bot = Frame(w, relief=RAISED, borderwidth=1)
bot.pack(side=BOTTOM, fill=BOTH)
# 2. Fill the top part with the bitmap and message.
msg = Message(top, width='3i', text=text,
font='-Adobe-Times-Medium-R-Normal-*-180-*')
msg.pack(side=RIGHT, expand=1, fill=BOTH, padx='3m', pady='3m')
if bitmap:
bm = Label(top, bitmap=bitmap)
bm.pack(side=LEFT, padx='3m', pady='3m')
# 3. Create a row of buttons at the bottom of the dialog.
var = IntVar()
buttons = []
i = 0
for but in args:
b = Button(bot, text=but, command=lambda v=var,i=i: v.set(i))
buttons.append(b)
if i == default:
bd = Frame(bot, relief=SUNKEN, borderwidth=1)
bd.pack(side=LEFT, expand=1, padx='3m', pady='2m')
b.lift()
b.pack (in_=bd, side=LEFT,
padx='2m', pady='2m', ipadx='2m', ipady='1m')
else:
b.pack (side=LEFT, expand=1,
padx='3m', pady='3m', ipadx='2m', ipady='1m')
i = i+1
# 4. Set up a binding for <Return>, if there's a default,
# set a grab, and claim the focus too.
if default >= 0:
w.bind('<Return>',
lambda e, b=buttons[default], v=var, i=default:
(b.flash(),
v.set(i)))
oldFocus = w.focus_get()
w.grab_set()
w.focus_set()
# 5. Wait for the user to respond, then restore the focus
# and return the index of the selected button.
w.waitvar(var)
w.destroy()
if oldFocus: oldFocus.focus_set()
return var.get()
# The rest is the test program.
def go():
i = dialog(mainWidget,
'Not Responding',
"The file server isn't responding right now; "
"I'll keep trying.",
'',
-1,
'OK')
print 'pressed button', i
i = dialog(mainWidget,
'File Modified',
'File "tcl.h" has been modified since '
'the last time it was saved. '
'Do you want to save it before exiting the application?',
'warning',
0,
'Save File',
'Discard Changes',
'Return To Editor')
print 'pressed button', i
def test():
import sys
global mainWidget
mainWidget = Frame()
Pack.config(mainWidget)
start = Button(mainWidget, text='Press Here To Start', command=go)
start.pack()
endit = Button(mainWidget, text="Exit", command=sys.exit)
endit.pack(fill=BOTH)
mainWidget.mainloop()
if __name__ == '__main__':
test()
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