Figure sticks out of window after setting window to fullscreen using a TkAgg backend on Windows

Question

I am trying to write a Python function that displays a grid of images in full screen mode using pyplot. When the window opens (TkAgg interactive backend on Windows 10), part of my plot is off the screen as seen here:

This is how it should look like:

How can I make the figure appear correctly on the screen?

Here is my code:

from PIL import Image
import matplotlib.pyplot as plt

def imageGrid(data_obj, grid=(3,3), start_idx=0):
    # set figure size to 1 inch by 1 inch
    figure = plt.figure(figsize=(1,1))
    cols, rows = grid
    idx = start_idx
    for i in range(1, cols * rows + 1):
        img = data_obj[idx]
        figure.add_subplot(rows, cols, i)
        plt.axis("off")
        plt.imshow(img, cmap="gray")
        idx += 1
    
    plt.subplots_adjust(wspace=0, hspace=0, left=0, right=1, bottom=0, top=1)

    # make the window open in full screen (this line is breaking it)
    plt.get_current_fig_manager().window.state('zoomed')

    plt.show()

list_of_images = [Image.open("Screenshot 2023-08-30 170601.png") for i in range(9)]
imageGrid(list_of_images)

To make the window appear full screen, I followed the instructions described here and here.

I have tried making the figure smaller by setting the figure to 1 by 1 inch, which is definitely smaller than my screen, but no matter what I set it seems to have no effect.

If I manually resize the window (take it in and out of full screen mode) after it opened the problem is resolved, so I was able to capture the desired look.

Answer 1

This seems to be a bug in matplotlib, but I have found a way to display it correctly for the first time the window opens. Note however, that once the window is resized by hand, this will "overcorrect" and the result will not be the same. Here are the steps:

• Run the code, so it displays the incorrect plot
• Click the sliders icon in the bottom right corner of the screen
• Set the parameters "right" and "bottom", such that the figure is on screen
• Call plt.subplots_adjust with the values obtained above

I ended up changing the line plt.subplots_adjust(wspace=0, hspace=0, left=0, right=1, bottom=0, top=1) to plt.subplots_adjust(wspace=0, hspace=0, left=0, right=0.565, bottom=0.442, top=1), so the final code is:

from PIL import Image
import matplotlib.pyplot as plt

def imageGrid(data_obj, grid=(3,3), start_idx=0):
    # set figure size to 1 inch by 1 inch
    figure = plt.figure(figsize=(1,1))
    cols, rows = grid
    idx = start_idx
    for i in range(1, cols * rows + 1):
        img = data_obj[idx]
        figure.add_subplot(rows, cols, i)
        plt.axis("off")
        plt.imshow(img, cmap="gray")
        idx += 1
    
    plt.subplots_adjust(wspace=0, hspace=0, left=0, right=0.565, bottom=0.442, top=1)

    # make the window open in full screen (this line is breaking it)
    plt.get_current_fig_manager().window.state('zoomed')

    plt.show()

list_of_images = [Image.open("Screenshot 2023-08-30 170601.png") for i in range(9)]
imageGrid(list_of_images)