How to Resize a Window in Python Tkinter on Button Click?

To resize a window in Python Tkinter on a button click, you can use the geometry method to set the new dimensions of the window. Here’s an example code snippet that demonstrates how to resize a window in Tkinter:

import tkinter as tk

def resize_window():
    """
    Resize the main window when the button is clicked.
    """
    # Get the current width and height of the window
    current_width = root.winfo_width()
    current_height = root.winfo_height()

    # Set the new width and height
    new_width = current_width + 100
    new_height = current_height + 100

    # Update the window dimensions
    root.geometry(f"{new_width}x{new_height}")

# Create the main window
root = tk.Tk()

# Create a button to resize the window
resize_button = tk.Button(root, text="Resize", command=resize_window)
resize_button.pack()

# Start the Tkinter event loop
root.mainloop()

In this example, we define the resize_window function that will be called when the button is clicked. Inside the function, we use the winfo_width and winfo_height methods of the root window (root) to get the current width and height of the window.

We then calculate the new width and height by adding a fixed value (e.g., 100) to the current dimensions. Finally, we use the geometry method of the root window to set the new dimensions, using the format "widthxheight".

We create the main window using tk.Tk(). Next, we create a button (resize_button) with the text “Resize” and associate it with the resize_window function using the command parameter. We pack the button using resize_button.pack() to display it in the window.

Finally, we start the Tkinter event loop using root.mainloop() to run the application and handle user interactions.

When you run the code, you’ll see a window with a “Resize” button. Clicking the button will resize the window by increasing its width and height by 100 pixels. You can modify the code to adjust the resizing logic according to your requirements.