diff options
Diffstat (limited to 'Demo/tkinter/matt/entry-with-shared-variable.py')
| -rw-r--r-- | Demo/tkinter/matt/entry-with-shared-variable.py | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/Demo/tkinter/matt/entry-with-shared-variable.py b/Demo/tkinter/matt/entry-with-shared-variable.py deleted file mode 100644 index 7d93da7..0000000 --- a/Demo/tkinter/matt/entry-with-shared-variable.py +++ /dev/null @@ -1,45 +0,0 @@ -from tkinter import * - -# 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) - - def upper(self): - # 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 = self.contents.get().upper() - self.contents.set(str) - - def print_contents(self, event): - print("hi. contents of entry is now ---->", self.contents.get()) - -root = App() -root.master.title("Foo") -root.mainloop() |