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#!/usr/bin/env python

import Tkinter
import tkMessageBox

from Tkconstants import *

class myWindow:

    def __init__(self):

        self.mw = Tkinter.Tk()
        self.mw.option_add("*font", ("Arial", 15, "normal"))
        self.mw.geometry("+250+200")
        self.mw.title("Text-Field-Demonstration")

        self.tfield = Tkinter.Text(self.mw,
                                   font = "{Courier} 15 {normal}",
                                   width = 82,
                                   height = 20,
                                   background = 'white',
                                   foreground = 'black')
        self.tfield.pack()

        self.tfield.insert(END, "Hello from inside the Text-widget.\n\nIf you click on it once, you can edit this text.")

        self.fr = Tkinter.Frame(self.mw)

        self.btn1 = Tkinter.Button(self.fr, text = "Show contents", command = self.Contents)

        self.btn2 = Tkinter.Button(self.fr, text = "Clear text-field", command = self.clearField)

        self.btn3 = Tkinter.Button(self.fr, text = "Exit", command = self.mw.destroy)

        self.btn1.pack(side = LEFT, padx = 20)
        self.btn3.pack(side = RIGHT, padx = 20)
        self.btn2.pack(padx = 20)
        self.fr.pack(pady = 10)

        self.mw.mainloop()

    def Contents(self):

        msg = "The text-field contains right now:\n\n"
        msg += self.tfield.get("1.0", END) + "\n"

        tkMessageBox.showinfo(title = 'Text-field-Contents', message = msg)

    def clearField(self):

        self.tfield.delete("1.0", END)

if __name__ == "__main__":
   app = myWindow()