from Tkinter import *

class AutoScrollbar(Scrollbar):
    # a scrollbar that hides itself if it's not needed.  only
    # works if you use the grid geometry manager.
    def set(self, lo, hi):
        if float(lo) <= 0.0 and float(hi) >= 1.0:
            # grid_remove is currently missing from Tkinter!
            self.tk.call("grid", "remove", self)
        else:
            self.grid()
        Scrollbar.set(self, lo, hi)
    def pack(self, **kw):
        raise TclError, "cannot use pack with this widget"
    def place(self, **kw):
        raise TclError, "cannot use place with this widget"

#
# create scrolled canvas

#root = Tk()
#
#vscrollbar = AutoScrollbar(root)
#vscrollbar.grid(row=0, column=1, sticky=N+S)
#hscrollbar = AutoScrollbar(root, orient=HORIZONTAL)
#hscrollbar.grid(row=1, column=0, sticky=E+W)
#
#canvas = Canvas(root, 
#                yscrollcommand=vscrollbar.set, 
#                xscrollcommand=hscrollbar.set)
#canvas.grid(row=0, column=0, sticky=N+S+E+W)
#
#vscrollbar.config(command=canvas.yview)
#hscrollbar.config(command=canvas.xview)
#
## make the canvas expandable
#root.grid_rowconfigure(0, weight=1)
#root.grid_columnconfigure(0, weight=1)
#
##
## create canvas contents
#
#frame = Frame(canvas)
#frame.rowconfigure(1, weight=1)
#frame.columnconfigure(1, weight=1)
#
#rows = 5 
#for i in range(1,rows):
#    for j in range(1,10):
#        button = Button(frame, padx=7, pady=7, text="[%d,%d]" % (i,j))
#        button.grid(row=i, column=j, sticky='news')
#
#canvas.create_window(0, 0, anchor=NW, window=frame)
#
#frame.update_idletasks()
#
#canvas.config(scrollregion=canvas.bbox("all"))
#
#root.mainloop()
