On 01/11/11 18:57, Chris Hare wrote:
Here is a code snippet I have pulled out of the project. It is as bare
bones as I can make it to get the point across.
I think you could have dropped a lot more to be honst - like all the
menu code for a start...
1. I would really like the window to be centered in the user's screen,
but setting the geometry doesn't place it there. (that isn't included here)
OK, But thats a problem for another day.
And some of these things are OS/UI dependent so you need to tell us what
OS you are on.
2. When I click the Login button, nothing happens. I know I am missing
something but it just isn't obvious what it is.
You don't provide a command in the command parameter. You provide a
string. When you click the button Python will try to call the string,
which won't work. You should get an error message in the console -= how
are you running this? Is it from a command prompt? If not you may not be
seeing all the error messages Python is sending you...
3. Finally, I would like to be able to hide the root window until the
authentication is performed, but root.hide() gets me a getattr error.
root.withdraw() works, but I can't get the root window back
Really? You want the Login window to disappear even before you have
authenticated the user? Thats very unusual behaviour. Usually the login
window only goes away once you have been authenticated.
import sys
from Tkinter import *
import tkMessageBox
import tkFont
class Login:
def __init__(self,parent):
self.window = parent
def show(instance):
window = Toplevel()
frame = Frame(window,bg=backColor)
> ...
label2 = Label(frame, text = "Username", fg="Blue", bg=backColor)
label3 = Label(frame, text = "Password", fg="Blue", bg=backColor)
login_userid = Entry(frame,bg=outFocusColor)
login_passwd = Entry(frame,bg=outFocusColor,show="*")
login_userid.bind("<Return>", login_passwd.focus_set())
btnLogin = Button(frame, text="Login", command="print button
pressed",highlightbackground=backColor)
you need to provide the name of a function to the command parameter - or
use a lambda expression if its just a one liner
frame.grid()
label2.grid(row=2, column=0,columnspan=3, sticky=W)
login_userid.grid(row=2, column=6, columnspan=5,sticky=W)
label3.grid(row=3, column=0,columnspan=3, sticky=W)
login_passwd.grid(row=3, column=6, columnspan=5,sticky=W)
btnLogin.grid(row=4, column=4, sticky=W)
if __name__ == "__main__":
root = Tk()
root.withdraw()
l = Login(root)
l.show()
root.mainloop()
HTH
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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