Initial revision

Demo/tkinter/guido/dialog.py

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+#! /ufs/guido/bin/sgi/tkpython
+
+# 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 *
+
+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.tk.call('global', 'button')
+    w.title(title)
+    w.iconname('Dialog')
+
+    top = Frame(w, {'relief': 'raised', 'bd': 1,
+		    Pack: {'side': 'top', 'fill': 'both'}})
+    bot = Frame(w, {'relief': 'raised', 'bd': 1,
+		    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-*',
+		   Pack: {'side': 'right', 'expand': 1,
+			  'fill': 'both',
+			  'padx': '3m', 'pady': '3m'}})
+    if bitmap:
+	bm = Label(top, {'bitmap': bitmap,
+			 Pack: {'side': 'left',
+				'padx': '3m', 'pady': '3m'}})
+
+    # 3. Create a row of buttons at the bottom of the dialog.
+
+    buttons = []
+    i = 0
+    for but in args:
+	b = Button(bot, {'text': but,
+			 'command': ('set', 'button', i)})
+	buttons.append(b)
+	if i == default:
+	    bd = Frame(bot, {'relief': 'sunken', 'bd': 1,
+			     Pack: {'side': 'left', 'expand': 1,
+				    'padx': '3m', 'pady': '2m'}})
+	    w.tk.call('raise', b)
+	    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',
+		     'ipady': '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 b=buttons[default], i=default:
+	       (b.cmd('flash'),
+		b.tk.call('set', 'button', i)))
+
+    oldFocus = w.tk.call('focus')
+    w.tk.call('grab', 'set', w)
+    w.tk.call('focus', w)
+
+    # 5. Wait for the user to respond, then restore the focus
+    # and return the index of the selected button.
+
+    w.tk.call('tkwait', 'variable', 'button')
+    w.tk.call('destroy', w)
+    w.tk.call('focus', oldFocus)
+    return w.tk.call('set', 'button')
+
+# 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': 'exit',
+		    Pack: {'fill' : 'both'}})
+    mainWidget.tk.mainloop()
+
+if __name__ == '__main__':
+    test()