Auto-resize Entry Widget in Tkinter Python

In Tkinter, the Entry widget is used to accept user input. By default, it has a fixed size, but it can be configured to automatically resize based on window resizing or content size. This can be achieved using the fill, expand, and sticky options.

In this tutorial, we will go through different methods to auto-resize an Entry widget in Tkinter.

Examples

1. Auto-resizing Entry Using pack() Layout

Using the pack() layout manager with fill='x' and expand=True, we can make the Entry widget stretch horizontally as the window resizes.

main.py

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import tkinter as tk

root = tk.Tk()
root.title("Auto-resizing Entry - tutorialkart.com")
root.geometry("400x200")

# Create an Entry widget
entry = tk.Entry(root, font=("Arial", 14))

# Use pack() with fill and expand to resize dynamically
entry.pack(fill="x", expand=True, padx=10, pady=20)

root.mainloop()

Output in Windows:

Auto-resizing Entry Using pack() Layout in Tkinter Python

2. Auto-resizing Entry Using grid() Layout

Using the grid() layout manager, we set the Entry widget to expand dynamically by configuring row and column weights.

main.py

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import tkinter as tk

root = tk.Tk()
root.title("Auto-resizing Entry - tutorialkart.com")
root.geometry("600x100")

# Configure grid layout
root.grid_columnconfigure(0, weight=1)
root.grid_rowconfigure(0, weight=1)

# Create an Entry widget
entry = tk.Entry(root, font=("Arial", 14))

# Use grid() to place it in column 0, row 0, and set it to stretch
entry.grid(row=0, column=0, sticky="ew", padx=10, pady=20)

root.mainloop()

Output in Windows:

Auto-resizing Entry Using grid() Layout using Tkinter Python

3. Auto-resizing Entry Using place() with Relative Sizing

The place() manager allows us to define relwidth=1.0, ensuring that the Entry widget resizes with the window.

main.py

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import tkinter as tk

root = tk.Tk()
root.title("Auto-resizing Entry - tutorialkart.com")
root.geometry("400x200")

# Create an Entry widget
entry = tk.Entry(root, font=("Arial", 14))

# Use place() to make it resize dynamically
entry.place(relx=0.5, rely=0.5, anchor="center", relwidth=0.9)

root.mainloop()

Output in Windows:

Auto-resizing Entry Using place() with Relative Sizing in Tkinter Python

Conclusion

In this tutorial, we explored different ways to auto-resize an Entry widget in Tkinter:

  • Using pack(fill="x", expand=True) to allow horizontal resizing.
  • Using grid(sticky="ew") with column weight configuration.
  • Using place(relwidth=1.0) for relative positioning.