How to Resize an Entry Box by Height in Tkinter?
Tkinter is a widely used GUI (Graphical User Interface) framework for creating desktop applications. In many applications, we make use of entry boxes to get user input. Sometimes, the default height of the entry box is too small for our requirements. In this article, we will learn how to resize an Entry box by height in Tkinter.
Prerequisites
Before we proceed with the steps, make sure you’ve installed Python version 3.x or above and Tkinter (pre-installed with Python). You can check it by running the following command in your Python interpreter.
import tkinter as tk
print(tk.TkVersion)
If it prints a version number, it means your system has Tkinter.
Steps to resize Entry Box by height
Whenever we create an Entry widget, we usually set its width but not its height. By default, the height of the Entry widget is 1, which is quite small. We can change this by setting the height attribute of the Entry widget. The height attribute specifies the number of lines in the Entry widget. Let’s see an example.
import tkinter as tk
root = tk.Tk()
# Create an Entry widget
entry_box = tk.Entry(root, width=50, height=5)
entry_box.pack()
root.mainloop()
In the above example, we’ve created an Entry widget with a width of 50 and a height of 5 (which means it will display 5 lines of text). We’ve also used the pack() method to display the widget.
You can also change the height of an existing Entry widget using the config method. Let’s modify the above example to change the height of the Entry widget on button click.
import tkinter as tk
def resize_entry_box():
entry_box.config(height=int(entry_box_height.get()))
root = tk.Tk()
# Create an Entry widget
entry_box = tk.Entry(root, width=50, height=5)
entry_box.pack()
# Create a label and an Entry widget to get the new height value
entry_box_height_label = tk.Label(root, text="New Height: ")
entry_box_height_label.pack()
entry_box_height = tk.Entry(root)
entry_box_height.pack()
# Create a button to resize the Entry widget
resize_button = tk.Button(root, text="Resize Entry Box", command=resize_entry_box)
resize_button.pack()
root.mainloop()
In the above example, we’ve created a function resize_entry_box
that gets the new height value from the Entry widget and sets it to the existing Entry widget using the config
method. We’ve also created a label and an Entry widget to get the new height value from the user.
Conclusion
In this tutorial, we learned how to resize an Entry widget by height in Tkinter. We saw how we can create an Entry widget with a custom height using the height
attribute and how we can change the height of an existing Entry widget using the config
method. By following these steps, you can easily customize the height of your Entry widget to meet your application requirements.