scrolledframe.py

from tkinter import (Frame, Scrollbar, Canvas)

# https://gist.github.com/EugeneBakin/76c8f9bcec5b390e45df


class VerticalScrolledFrame(Frame):
    """A pure tkinter scrollable frame that actually works!

    * Use the 'interior' attribute to place widgets inside the scrollable frame
    * Construct and pack/place/grid normally
    * This frame only allows vertical scrolling

    """

    def _configure_interior(self, event):
        # update the scrollbars to match the size of the inner frame
        size = (self.interior.winfo_reqwidth(),
                self.interior.winfo_reqheight())
        self.canvas.config(scrollregion="0 0 %s %s" % size)
        if self.interior.winfo_reqwidth() != self.canvas.winfo_width():
            # update the canvas's width to fit the inner frame
            self.canvas.config(width=self.interior.winfo_reqwidth())
        self.interior.bind('<Configure>', _configure_interior)

    def _configure_canvas(self, event):
        if self.interior.winfo_reqwidth() != self.canvas.winfo_width():
            # update the inner frame's width to fill the canvas
            self.canvas.itemconfigure(
                self.interior_id, width=self.canvas.winfo_width())
        self.canvas.bind('<Configure>', _configure_canvas)
        return

    def configure_scrolling(self):
        # create a canvas object and a vertical scrollbar for scrolling it
        vscrollbar = Scrollbar(self, orient='vertical')
        vscrollbar.grid(row=0, column=1, sticky='nsw')
        self.canvas = Canvas(self, bd=0, highlightthickness=0,
                             yscrollcommand=vscrollbar.set)
        self.canvas.grid(row=0, column=0, sticky='nsew')
        vscrollbar.config(command=self.canvas.yview)

        # reset the view
        self.canvas.xview_moveto(0)
        self.canvas.yview_moveto(0)

        # create a frame inside the canvas which will be scrolled with it
        self.interior = interior = Frame(self.canvas)
        self.interior.grid(row=0, column=0, sticky='nsew')
        self.interior_id = self.canvas.create_window(0, 0, window=interior,
                                                     anchor='nw')

        # track changes to the canvas and frame width and sync them,
        # also updating the scrollbar