#!/usr/bin/python3
from tkinter import *

class FFUI(Frame):
    def __init__(self, master):
        Frame.__init__(self, master)
        self.pack(fill='both', expand=1)
        self.textwindow = Frame(self)
        self.controls = Frame(self)

        self.controls.pack(side=RIGHT)
        self.textwindow.pack(side=LEFT, fill='both', expand=1)
        self.editor = Text(self.textwindow)
        self.editor.pack(fill='both', expand=1)
        
        self.something_button = Button(self.controls, text="Do Something", command=self.demo_function)
        self.something_button.pack()
        Button(self.controls, text="Change other button", command=self.change_text).pack()

    def demo_function(self):
        self.editor.insert(END, "hi");

    def change_text(self):
        self.something_button.configure(text = "moose")

root = Tk()
w,h = root.winfo_screenwidth(), root.winfo_screenheight()
root.geometry("%dx%d+0+0" % (400, 400))
root.title("Tkinter Demo")
ffui = FFUI(root)
root.mainloop()