How to make Scrollbar work in Tkinter frame?

Question

I'm making a project where I have to display logs in a frame with the help of Tkinter. Here is my code for that particular frame.

# frame3 for logs
frame3 = Frame(
    win,
    bg='black',
    width=310,
    height=140,
    padx=0,
    pady=0)
frame3.pack(fill=X, expand=True, padx=(0, 10), pady=0)
frame3.pack_propagate(0)  # stops frame from shrinking
scroll = Scrollbar(frame3)
scroll.pack(side = RIGHT, fill = Y)

The logs are generated and are printed in that frame. Here is the code for generating and printing logs

logs = Label(frame3, text = (time.ctime()), font=("Consolas", 9), bg="#000000", fg="#ffffff")
logs.pack(pady=(0, 0))

The scrollbar is showing but it is somehow not working. The scroll is sliding if I click and slide it with the mouse. I guess there are 3 types of scrollbars in Tkinter (Correct me if I'm wrong).

window scrollbar.
Frame scrollbar.
Label Scrollbar (not sure about that).

I think the problem is that I made is a scrollbar for a frame. But, I need it for Label. Or is there any way by which I can print logs directly onto the frame? Don't know what the actual problem is. Also, is there a way by which I can make it auto scrollable when the logs are generated?

Any help would be greatly appreciated. Thanks in advance.

There is only one type of scrollbar, and it can't scroll frames or labels. Why are you using labels in a frame rather than a `Text` widget? — Bryan Oakley, May 07 '20 at 13:22
Use a `Text` or `Canvas` so you can link up logs and scrollbar. For now in your case the scrollbar and a frame are independent. — rizerphe, May 07 '20 at 13:25
logs = Text(frame3, height=2, width=30) logs.pack() logs.insert(END, time.ctime()) I used this still it's not working. @БогданОпир — Vraj Kotwala, May 07 '20 at 13:39
You did not link up the scrollbar and `Text`. That's why that did not work. — rizerphe, May 07 '20 at 14:06
`bar.config(command=text.yview)`, `text.config(yscrollcommand=bar.set)`. Correct me if I'm wrong. — rizerphe, May 07 '20 at 14:15

score 3 · Accepted Answer · answered May 07 '20 at 13:44

3

Here is an example using tkinter.scrolledtext:

from tkinter import *
from tkinter import scrolledtext

root = Tk()

txt = scrolledtext.ScrolledText(root)
txt['font'] = ('consolas', '12')
txt.pack(expand=True, fill='both')
txt.configure(state=DISABLED)

def log(data):
    txt.configure(state=NORMAL)
    txt.insert(END, data+'\n')
    txt.configure(state=DISABLED)

log('abc')
log('abcde')

root.mainloop()

Hope that's helpful!

answered May 07 '20 at 13:44

rizerphe

1,340
1
14
24

Somehow this doesn't work when logs are generated on runtime! Only the first log is displayed – Vraj Kotwala May 07 '20 at 15:51
Try using `root.update()` to update the window. Not sure that would help, can't tell why else wouldn't that work. – rizerphe May 07 '20 at 15:52
Thanks, man this worked. Actually I was putting the pack() method inside the loop! – Vraj Kotwala May 07 '20 at 16:29
@Vraj: Read up on [What's the difference between "update" and "update_idletasks"?](https://stackoverflow.com/a/29159152/7414759) – stovfl May 07 '20 at 17:46

score 0 · Answer 2 · answered May 07 '20 at 16:36

0

.see("end") method helps autoscroll.

answered May 07 '20 at 16:36

Vraj Kotwala

150
8

2

While this code may solve the OP's issue, it is better to add context, or an explanation as to why this solves the OP's problem, so future visitors can learn from your post, and apply this knowledge to their own issues. High Quality Answers are much more likely to be upvoted, and contribute to the value and quality of SO as a platform. You can also add a link to documentation, if that helps. – SherylHohman May 07 '20 at 17:49

How to make Scrollbar work in Tkinter frame?

2 Answers2