Get the value from a Tkinter scale and put it into a Label
In Tkinter, a popular Python GUI toolkit, the scale widget is used to get numerical input from the user. This widget provides a slider-like interface that allows the user to select a value within a specified range. In this tutorial, we will be discussing how to get the value from a Tkinter scale widget and display it in a label widget.
Creating a Tkinter scale widget
To create a Tkinter scale widget, we need to use the Scale()
method. The Scale()
method takes various arguments such as the window it needs to be placed on, the range of values it can take, the orientation of the widget, etc.
Below is an example code snippet on how to create a Tkinter scale widget:
# Import the tkinter module
import tkinter as tk
# Create the root window
root = tk.Tk()
# Create the Scale widget
scale = tk.Scale(root, from_=0, to=100, orient=tk.HORIZONTAL)
# Pack the Scale widget
scale.pack()
# Start the main GUI loop
root.mainloop()
In the above example, we have created a Tkinter scale widget that can take values in the range of 0 to 100. The from_
and to
attributes determine the range of values the scale widget can take. The orient
attribute sets the orientation of the scale widget.
Getting the value from the Scale widget
To get the value from the Tkinter scale widget, we need to use the get()
method. This method returns the current value of the Scale widget. We can then use this value to update a label widget.
Below is an example code snippet on how to get the value from a Tkinter scale widget:
# Import the tkinter module
import tkinter as tk
# Create the root window
root = tk.Tk()
# Create the Scale widget
scale = tk.Scale(root, from_=0, to=100, orient=tk.HORIZONTAL)
# Create the Label widget
label = tk.Label(root, text="Value: 0")
# Define a function to update the Label widget
def update_label():
value = scale.get()
label.config(text=f"Value: {value}")
# Create a Button widget to call the update_label() function
button = tk.Button(root, text="Get value", command=update_label)
# Pack the widgets
scale.pack()
label.pack()
button.pack()
# Start the main GUI loop
root.mainloop()
In the above example, we have created a Tkinter scale widget and a label widget. We have also defined a function called update_label()
that gets the current value of the scale widget using the get()
method and updates the label with the new value. Finally, we have created a button widget that calls the update_label()
function when clicked.
Conclusion
In this tutorial, we have learned how to create a Tkinter scale widget, get the value from it, and display the value in a label widget. Tkinter provides us with an easy-to-use slider widget that allows us to get numerical input from the user in a visual way. We can use this input to perform various tasks in our application.