On 4/28/06, Ilknur Ozturk <[EMAIL PROTECTED]> wrote:
If I can use if statement to determine the which function will be called
when the button presses, it will be very helpful. Then I can call any
function by checking the button's attributes with if statement. If it is not
possible, how can I realize such an aim. If we can use if statement for
button's command option, can you give me an example?
Marhava, Ilknur-bey:
In tkinter program, it will be helpful to think about states rather
than conditions, since the GUI is event-driven. So instead of an if
statement 'per se', think of telling the application whether you are
in an initial state or a subsequent state.
Here's a little app that accomplishes what you are after. The app
also illustrates some elements of good Tkinter program design practice
(at least, as far as I understand them!) :-)
cheers,
Stewart
#!/usr/bin/python
#buttonpress.py
from Tkinter import *
class ButtonPress:
def __init__(self):
"""init some vars"""
self.firstTime = 1
def draw_gui(self):
"""draw the user interface"""
text1 = "press me!"
b = Button(root, text=text1, command=self.buttonpress)
b.pack()
text2="First time is the best"
l = Label(root, text=text2)
l.pack()
self.l = l
def buttonpress(self):
"""deal with button presses"""
if self.firstTime:
self.firstTime = 0
msg = "Iyi gunlar!\nthe first time is the best"
self.l.config(text=msg)
#do some other first-time stuff here
else:
msg = "Tesekur ederim!\nyou can never go back to the first time"
self.l.config(text=msg)
#do some other non-first-time stuff here
if __name__ == "__main__":
root = Tk()
root.title("Button Press demo")
root.geometry('300x100+400+400')
btn = ButtonPress()
btn.draw_gui()
root.mainloop()
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