How to set a default string value on a Tkinter Spinbox?

TkinterPythonGUI-Programming

To set a default string value on a Tkinter Spinbox, we will have to use the set method. Let us take an example and see how to create a spinbox with a set of string values and then set a default string.

Steps −

  • Import the tkinter library and create an instance of tkinter frame.

  • Set the size of the frame using geometry method.

  • Create a set of strings and save it in a variable, data.

  • Next, use the StringVar() constructor to create a StringVar object. It helps to manage the value of a widget, which is Spingbox in this case. If you don't pass any parameters, then it defaults to the root window.

  • Create a spinbox and set its values by passing the data values.

  • Assign the StringVar object to the textvariable of the spinbox. Using textvariable, you can easily update the text of a widget.

  • Set a default value for the spinbox by using the set method. Here, we have picked a value from data and set it as default. var.set('Truck'). You can also use var.set(data[2]).

  • Finally, run the mainloop of the application window.

Example

from tkinter import *

win = Tk()
win.geometry('700x350')
win.title('Spinbox')

data = ['Car', 'Bus', 'Truck', 'Bike', 'Airplane']

var = StringVar(win)

my_spinbox = Spinbox(win, values=data, textvariable=var, width=20, font="Calibri, 12")
my_spinbox.pack(padx=20, pady=20)
var.set('Truck')

win.mainloop()

Output

Now, let's check its output −

raja
Published on 26-Oct-2021 13:48:55
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