# This code solves the last problem on Midterm 2, Spring 2008

from Tkinter import *
import tkMessageBox

count = 0  # How many times have they pushed a button?

def update():
    "This is called everytime any button is pushed"
    global count, root
    count += 1  # Update the count by adding one
    ans = tkMessageBox.askyesno(message='You have pushed the button %d times. Continue?' %(count))
    if not ans:
        root.destroy()

def addButton(parent, mySide):
    myBtn = Button(parent, text='BTN', command=update) # Add a command to be called everytime a button is pushed
    myBtn.pack(side=mySide)

def layoutWidgets2(parent):
    ''' Layout the widgets going like this:
            BTN
                   BTN
            BTN
    '''
    leftFrame = Frame(parent) # Create the left frame and put it in the parent window
    rightFrame = Frame(parent) # Create the bottom frame and put it in the parent window

    addButton(leftFrame, TOP) # Add button into the top frame
    addButton(leftFrame, TOP) # Add button into the top frame

    addButton(rightFrame, TOP) # Add button into the bottom frame

    leftFrame.pack(side=LEFT)  # Pack this frame and put the next frame's LEFT side as close to this frame as possible
    rightFrame.pack(side=LEFT) # Pack this frame and put the next frame's LEFT side as close to this frame as possible

def layoutWidgets(parent):
    ''' Layout the widgets going like this:
            BTN    BTN
               BTN
    '''
    topFrame = Frame(parent) # Create the top frame and put it in the parent window
    bottomFrame = Frame(parent) # Create the bottom frame and put it in the parent window

    addButton(topFrame, LEFT) # Add button into the top frame
    addButton(topFrame, LEFT) # Add button into the top frame

    addButton(bottomFrame, TOP) # Add button into the bottom frame

    topFrame.pack(side=TOP)    # Pack this frame and put the next frame's TOP side as close to this frame as possible
    bottomFrame.pack(side=TOP) # Pack this frame and put the next frame's TOP side as close to this frame as possible


# THIS DOES NOT WORK!!!!
def layoutWidgetsBad(parent):
   addButton(parent, TOP)
   addButton(parent, RIGHT)
   addButton(parent, BOTTOM)


def main():
    global root
    root = Tk() # Create the root window
    layoutWidgets(root)
    #layoutWidgets2(root)
    #layoutWidgetsBad(root)
    root.mainloop()

main()