[Tkinter-discuss] Pressing buttons

[John McMonagle]

Bob Greschke wrote:
> You want to do something like this:
> 
> from Tkinter import *
> Root = Tk()
> 
> EntryVar = StringVar()
> 
> def doSomething(e = None):
>     print EntryVar.get()
>     return
> 
> Sub = Frame(Root)
> Ent = Entry(Sub, width = 10, variable = EntryVar)
> Ent.pack(side = LEFT)
> Ent.bind("<Return>", doSomething)
> Ent.bind("<KP_Enter>", doSomething)  <- for the numeric keypad Enter key
> Button(Sub, text = "OK", command = doSomething).pack(side = LEFT)
> Sub.pack(side = TOP)
> 
> Root.mainloop()
> 
> 
> It is important that the Entry field .pack() be on a line by itself and not 
> combined like  Entry().pack(), otherwise Ent will be equal to None and the 
> bind will not work.
> 
> No problem with the English.  We'll get through it. :)
> 
> Bob
> 
Not sure where Bob pulled "variable" out of, but rest assured it's not 
an option to the Entry widget.

Something along these lines may help (note I've excluded the Button as 
it appears to be redundant in this case):


from Tkinter import *

root = Tk()

def onPressEnter(event):
     print event.widget.get()      # Get entry widget's string
     event.widget.delete(0, END)   # Clears the entry widget

e = Entry(root, width=10)
e.pack()

e.bind('<Return>', onPressEnter)
e.bind('<KP_Enter>', onPressEnter)

root.mainloop()


Regards,

John