How can I create a scrollable frame in Tkinter using a canvas and scrollbar?-Python Tutorial-php.cn

How can I create a scrollable frame in Tkinter using a canvas and scrollbar?

Mary-Kate Olsen

Release： 2024-11-26 08:57:12

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How can I create a scrollable frame in Tkinter using a canvas and scrollbar?

Utilizing Tkinter to Add Scrollbar Functionality to Frames

In Tkinter, creating a scrollable frame necessitates incorporating a scrollbar, which enables the automatic scrolling of content that exceeds the frame's height. Based on insightful discussions, it was suggested that constructing a frame, enclosing a canvas within it, and attaching the scrollbar to the frame would achieve the desired functionality. A window object was then conceived within the canvas to accommodate additional frames.

Using the following Python code, a vertically scrollable frame can be implemented effectively:

import tkinter as tk
import tkinter.ttk as ttk

class VerticalScrolledFrame(ttk.Frame):
    def __init__(self, parent, *args, **kw):
        ttk.Frame.__init__(self, parent, *args, **kw)
        vscrollbar = ttk.Scrollbar(self, orient=VERTICAL)
        vscrollbar.pack(fill=Y, side=RIGHT, expand=FALSE)
        canvas = tk.Canvas(self, bd=0, highlightthickness=0, yscrollcommand=vscrollbar.set)
        canvas.pack(side=LEFT, fill=BOTH, expand=TRUE)
        vscrollbar.config(command=canvas.yview)
        canvas.xview_moveto(0)
        canvas.yview_moveto(0)
        self.interior = interior = ttk.Frame(canvas)
        interior_id = canvas.create_window(0, 0, window=interior, anchor=NW)
        def _configure_interior(event):
            size = (interior.winfo_reqwidth(), interior.winfo_reqheight())
            canvas.config(scrollregion="0 0 %s %s" % size)
            if interior.winfo_reqwidth() != canvas.winfo_width():
                canvas.config(width=interior.winfo_reqwidth())
        interior.bind('<Configure>', _configure_interior)
        def _configure_canvas(event):
            if interior.winfo_reqwidth() != canvas.winfo_width():
                canvas.itemconfigure(interior_id, width=canvas.winfo_width())
        canvas.bind('<Configure>', _configure_canvas)

root = tk.Tk()
frame = VerticalScrolledFrame(root)
frame.pack()
for i in range(10):
    ttk.Button(frame.interior, text="Button " + str(i)).pack()
root.mainloop()

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Addressing the Queries:

It is possible to achieve this functionality in a more efficient manner by utilizing the code provided.
The grid method is preferred because it allows for greater control over the layout of widgets within the frame.
The anchor='nw' argument specifies that the window should be anchored to the northwest corner of the canvas, ensuring that the content remains visible as the frame is scrolled vertically.

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