Bind Escape to Exit

[Binny V A]

Hello Everyone,

I am new to python and I am trying to get a program
to close a application when the Escape Key is pressed.

This is the code that I used

---------------------------------
from Tkinter import *

class Application(Fra me):
def createWidgets(s elf):
self.lab = Label(text="Hel lo World")
self.lab.pack()

def __init__(self, master=None):
Frame.__init__( self, master)
self.pack()
self.createWidg ets()
self.bind('<Key-Escape>',self.q uit)

app = Application()
app.mainloop()

---------------------------------

It is displaying everything properly, but it is not quiting
when the escape key is pressed.

What am I doing wrong

Thank You,
Binny V A

http://www.geocities.com/binnyva/code

[Harlin Seritt]

Re: Bind Escape to Exit

Binny,

The only way I could think to get this done was like so:

from Tkinter import *

class Application: # take away the inherited class

def end(self, event):
self.master.des troy()

def createWidgets(s elf):
self.lab = Label(text="Hel lo World")
self.lab.pack()

def __init__(self, master):
self.master = master # Create a class version of master:
self.master
self.frame = Frame(self.mast er) # Change master to self.master
self.frame.pack ()
self.createWidg ets()
self.master.bin d('<Escape>', self.end) # Change <Key-Escape> to
<Escape>, link bind to self.end

root = Tk() # Use a tk instance
a = Application(roo t)
root.mainloop() # Call tk.mainloop()

I am almost certain that I had the same dilemma as you. Good luck. If
you find a better way please post it.

Thanks,

Harlin Seritt

[Kent Johnson]

Re: Bind Escape to Exit

Binny V A wrote:[color=blue]
> Hello Everyone,
>
> I am new to python and I am trying to get a program
> to close a application when the Escape Key is pressed.[/color]

Here is a version that works. The changes from yours:
- Bind <Escape>, not <Key-Escape>
- Bind the key to the root, not the frame
- Define a quit() method that takes an event parameter

from Tkinter import *

class Application(Fra me):
def createWidgets(s elf):
self.lab = Label(text="Hel lo World")
self.lab.pack()

def __init__(self, master=None):
Frame.__init__( self, master)
self.pack()
self.createWidg ets()
master.bind('<E scape>',self.qu it)

def quit(self, event):
Frame.quit(self )

root=Tk()
app = Application(roo t)
app.mainloop()


Kent
[color=blue]
>
> This is the code that I used
>
> ---------------------------------
> from Tkinter import *
>
> class Application(Fra me):
> def createWidgets(s elf):
> self.lab = Label(text="Hel lo World")
> self.lab.pack()
>
> def __init__(self, master=None):
> Frame.__init__( self, master)
> self.pack()
> self.createWidg ets()
> self.bind('<Key-Escape>',self.q uit)
>
> app = Application()
> app.mainloop()
>
> ---------------------------------
>
> It is displaying everything properly, but it is not quiting
> when the escape key is pressed.[/color]