Decorator Recipe: Event Binding in Tkinter

Step 1

Subclass Tkinter’s Button class and give it a decorator method.

from Tkinter import *

class MyButton(Button):
    """Add a method to this class"""

if __name__ == '__main__':
    frame = Frame()
    frame.master.title("Event binding with decorators")
    frame.pack()

    btn1 = MyButton(frame, text="One")
    btn1.pack()

    btn2 = MyButton(frame, text="Two")
    btn2.pack()

    @btn1.command
    @btn2.command
    def onclick():
        print 'You clicked on a button'

    frame.mainloop()

Expected output:

Hints

1. Step 0 of this recipe is a big hint by itself.
2. The name of the method is command, and it needs to accept one parameter.
3. You need to write at least two lines of code inside command.
4. Don’t forget the return value.

Solution: solutions/tkinter1.py

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