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109 lines
3.1 KiB
Python
Executable file
109 lines
3.1 KiB
Python
Executable file
#! /usr/bin/env python3
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# A Python function that generates dialog boxes with a text message,
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# optional bitmap, and any number of buttons.
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# Cf. Ousterhout, Tcl and the Tk Toolkit, Figs. 27.2-3, pp. 269-270.
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from tkinter import *
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import sys
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def dialog(master, title, text, bitmap, default, *args):
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# 1. Create the top-level window and divide it into top
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# and bottom parts.
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w = Toplevel(master, class_='Dialog')
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w.title(title)
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w.iconname('Dialog')
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top = Frame(w, relief=RAISED, borderwidth=1)
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top.pack(side=TOP, fill=BOTH)
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bot = Frame(w, relief=RAISED, borderwidth=1)
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bot.pack(side=BOTTOM, fill=BOTH)
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# 2. Fill the top part with the bitmap and message.
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msg = Message(top, width='3i', text=text,
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font='-Adobe-Times-Medium-R-Normal-*-180-*')
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msg.pack(side=RIGHT, expand=1, fill=BOTH, padx='3m', pady='3m')
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if bitmap:
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bm = Label(top, bitmap=bitmap)
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bm.pack(side=LEFT, padx='3m', pady='3m')
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# 3. Create a row of buttons at the bottom of the dialog.
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var = IntVar()
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buttons = []
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i = 0
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for but in args:
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b = Button(bot, text=but, command=lambda v=var,i=i: v.set(i))
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buttons.append(b)
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if i == default:
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bd = Frame(bot, relief=SUNKEN, borderwidth=1)
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bd.pack(side=LEFT, expand=1, padx='3m', pady='2m')
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b.lift()
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b.pack (in_=bd, side=LEFT,
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padx='2m', pady='2m', ipadx='2m', ipady='1m')
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else:
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b.pack (side=LEFT, expand=1,
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padx='3m', pady='3m', ipadx='2m', ipady='1m')
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i = i+1
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# 4. Set up a binding for <Return>, if there's a default,
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# set a grab, and claim the focus too.
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if default >= 0:
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w.bind('<Return>',
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lambda e, b=buttons[default], v=var, i=default:
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(b.flash(),
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v.set(i)))
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oldFocus = w.focus_get()
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w.grab_set()
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w.focus_set()
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# 5. Wait for the user to respond, then restore the focus
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# and return the index of the selected button.
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w.waitvar(var)
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w.destroy()
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if oldFocus: oldFocus.focus_set()
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return var.get()
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# The rest is the test program.
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def go():
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i = dialog(mainWidget,
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'Not Responding',
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"The file server isn't responding right now; "
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"I'll keep trying.",
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'',
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-1,
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'OK')
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print('pressed button', i)
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i = dialog(mainWidget,
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'File Modified',
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'File "tcl.h" has been modified since '
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'the last time it was saved. '
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'Do you want to save it before exiting the application?',
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'warning',
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0,
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'Save File',
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'Discard Changes',
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'Return To Editor')
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print('pressed button', i)
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def test():
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import sys
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global mainWidget
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mainWidget = Frame()
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Pack.config(mainWidget)
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start = Button(mainWidget, text='Press Here To Start', command=go)
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start.pack()
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endit = Button(mainWidget, text="Exit", command=sys.exit)
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endit.pack(fill=BOTH)
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mainWidget.mainloop()
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if __name__ == '__main__':
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test()
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