# Tk_scrollbars.py

# Tk_scrollbars.py

from Tkinter import *
root = Tk()

#Add a canvas to the window
canvas = Canvas(root,width=300, height=300)
canvas.grid(column=0, row=0, sticky=N+S+E+W)

#Allow the canvas (in row/column 0,0)
#to "grow" to fill the entire window.
root.grid_rowconfigure(0, weight=1)
root.grid_columnconfigure(0, weight=1)


#Add a scrollbar that will scroll the canvas vertically
vscrollbar = Scrollbar(root)
vscrollbar.grid(column=1, row=0, sticky=N+S)
#Link the scrollbar to the canvas
canvas.config(yscrollcommand=vscrollbar.set)
vscrollbar.config(command=canvas.yview)


#Add a scrollbar that will scroll the canvas horizontally
hscrollbar = Scrollbar(root, orient=HORIZONTAL)
hscrollbar.grid(column=0, row=1, sticky=E+W)
canvas.config(xscrollcommand=hscrollbar.set)
hscrollbar.config(command=canvas.xview)



#This frame must be defined as a child of the canvas,
#even though we later add it as a window to the canvas

f = Frame(canvas)

#
#f.rowconfigure(1, weight=1)
#f.columnconfigure(1, weight=1)

#Create a button in the frame.
b = Button(f,text="Hello Python World!")
b.grid(row=0, column=0)

#Add a large grid of sample label widgets to fill the space
c = 1
for x in range(1,33):
    for y in range(1,43):
        if x > 30 or y > 40:
            s = '...'
        else:
            s = str(c)
            c += 1
        Label(f, text=s).grid(row=1+x, column=y)

#Add the frame to the canvas
canvas.create_window((0,0), anchor=NW, window=f)

#IMPORTANT:
#Unless you want to bind an event handler to be called
#when the frame's geometry manager finishes calculating
#the frame size you need to call f.update_idletasks() so
#that the call to f.bbox() on the following line will
#return the correct bounding box size
f.update_idletasks()

#Tell the canvas how big of a region it should scroll
#The size of the frame.
canvas.config(scrollregion= f.bbox("all")  )

mainloop()