Tkinter 8.5 reference: a GUI for Python |  |
When the user manipulates a scrollbar, the scrollbar
calls its command callback. The arguments
to this call depend on what the user does:
When the user requests a movement of one “unit” left or up, for example by clicking button B1 on the left or top arrowhead, the arguments to the callback look like:
command(tk.SCROLL, -1, tk.UNITS)When the user requests a movement of one unit right or down, the arguments are:
command(tk.SCROLL, 1, tk.UNITS)When the user requests a movement of one page left or up:
command(tk.SCROLL, -1, tk.PAGES)When the user requests a movement of one page right or down:
command(tk.SCROLL, 1, tk.PAGES)When the user drags the slider to a value
fcommand(tk.MOVETO,f)
These calling sequences match the arguments expected by
the .xview() and .yview()
methods of canvases, listboxes, and text widgets. The
Entry widget does not have an .xview() method. See Section 10.1, “Scrolling an Entry widget”.