""" tkControl.py 
    add a command and button to tk form
"""

import Tkinter

class App(object):
    def __init__(self, master):
        self.frame = Tkinter.Frame(master)
        self.frame.grid()
        
        self.lblOutput = Tkinter.Label(self.frame,
                                       text = "Click the button")
        self.lblOutput.grid()
        
        self.txtInput = Tkinter.Entry(self.frame)
        self.txtInput.grid()

        self.btnClickMe = Tkinter.Button(self.frame, 
                                         text = "click me",
                                         command = self.sayHi)
        self.btnClickMe.grid()
    
    def sayHi(self):
        user = self.txtInput.get()
        text = "Hi there, %s" % user
        self.lblOutput["text"] = text

root = Tkinter.Tk()
root.title("control demo")
app = App(root)

root.mainloop()