diff options
Diffstat (limited to 'Demo/tkinter/matt/entry-with-shared-variable.py')
| -rw-r--r-- | Demo/tkinter/matt/entry-with-shared-variable.py | 63 |
1 files changed, 31 insertions, 32 deletions
diff --git a/Demo/tkinter/matt/entry-with-shared-variable.py b/Demo/tkinter/matt/entry-with-shared-variable.py index 360f973..2b76162 100644 --- a/Demo/tkinter/matt/entry-with-shared-variable.py +++ b/Demo/tkinter/matt/entry-with-shared-variable.py @@ -1,47 +1,46 @@ from Tkinter import * -import string +import string # This program shows how to make a typein box shadow a program variable. class App(Frame): def __init__(self, master=None): - Frame.__init__(self, master) - self.pack() - - self.entrythingy = Entry(self) - self.entrythingy.pack() - - self.button = Button(self, text="Uppercase The Entry", - command=self.upper) - self.button.pack() - - # here we have the text in the entry widget tied to a variable. - # changes in the variable are echoed in the widget and vice versa. - # Very handy. - # there are other Variable types. See Tkinter.py for all - # the other variable types that can be shadowed - self.contents = StringVar() - self.contents.set("this is a variable") - self.entrythingy.config(textvariable=self.contents) - - # and here we get a callback when the user hits return. we could - # make the key that triggers the callback anything we wanted to. - # other typical options might be <Key-Tab> or <Key> (for anything) - self.entrythingy.bind('<Key-Return>', self.print_contents) + Frame.__init__(self, master) + self.pack() + + self.entrythingy = Entry(self) + self.entrythingy.pack() + + self.button = Button(self, text="Uppercase The Entry", + command=self.upper) + self.button.pack() + + # here we have the text in the entry widget tied to a variable. + # changes in the variable are echoed in the widget and vice versa. + # Very handy. + # there are other Variable types. See Tkinter.py for all + # the other variable types that can be shadowed + self.contents = StringVar() + self.contents.set("this is a variable") + self.entrythingy.config(textvariable=self.contents) + + # and here we get a callback when the user hits return. we could + # make the key that triggers the callback anything we wanted to. + # other typical options might be <Key-Tab> or <Key> (for anything) + self.entrythingy.bind('<Key-Return>', self.print_contents) def upper(self): - # notice here, we don't actually refer to the entry box. - # we just operate on the string variable and we + # notice here, we don't actually refer to the entry box. + # we just operate on the string variable and we # because it's being looked at by the entry widget, changing - # the variable changes the entry widget display automatically. - # the strange get/set operators are clunky, true... - str = string.upper(self.contents.get()) - self.contents.set(str) + # the variable changes the entry widget display automatically. + # the strange get/set operators are clunky, true... + str = string.upper(self.contents.get()) + self.contents.set(str) def print_contents(self, event): - print "hi. contents of entry is now ---->", self.contents.get() + print "hi. contents of entry is now ---->", self.contents.get() root = App() root.master.title("Foo") root.mainloop() - |