CODEWITHSUNDEEP
pythontkinter
Steven Oh
Steven Oh

Reputation: 394

Display tkinter scale value realtime

I made a scale in Tkinter using the code below:

demo = ttk.Labelframe(col2, text='Demo', padding=(15, 10))
demo.pack(side='top', fill='both', expand='yes', pady=(10, 0))
epoch = ttk.Frame(demo)
epoch.pack(fill='x', padx=(20, 0), pady=(5, 0))

ttk.Label(epoch, text='10 epoch').pack(side='left')
ttk.Label(epoch, text='1000 epoch').pack(side='right')
ttk.Scale(epoch, value=990, from_=10, to=1000).pack(side='left', fill='x', expand='yes', padx=(30, 0))

I want to have a label that displays the value of the scale at its current position in real time right below it. How should I achieve that?

enter image description here

Upvotes: 0

Views: 1110

Answers (2)

Art
Art

Reputation: 3089

From my understanding of your question, you want to place the label right below the handle of your Slider/Scale widget. This can be easily achieved using the place on a Label. To get the x, y coordinates of the handle use the scale.coords.

Minimal example:

from tkinter import ttk
import tkinter  as tk


def update_lbl(*args):

    x, _ = scale.coords()  # gets handle x position
    y, h = scale.winfo_y(), scale.winfo_height() # get the widgets y position and height
    scale_lbl.place(x=x, y=h+y) 


root = tk.Tk()

val = tk.IntVar(root)

val.set(0)

scale_lbl = tk.Label(root, textvariable=val)

scale = ttk.Scale(root, variable=val, from_=10, to=1000)
scale.pack(side='left', fill='x', expand='yes', padx=(30, 0))
scale.bind('<Configure>', lambda ev: scale.after(1, update_lbl))

val.trace('w', update_lbl)

root.mainloop()

output:

enter image description here

Upvotes: 1

user15801675
user15801675

Reputation:

You can create an IntVar()

scale_val=IntVar()
ttk.Scale(epoch, value=990,variable=scale_val, from_=10, to=1000).pack(side='left', fill='x', expand='yes', padx=(30, 0))
lbl_val=ttk.Label(epoch)
lbl_val.pack(side='bottom') #=== Set it according to your will

Then you can trace the variable:

def trace_method(*args):
    x=scale_val.get()
    lbl_val.config(text=f'{x} %')
scale_val.trace('w',trace_method)

Upvotes: 2

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