Bug summary

When changing the window size of a figure, the figure does not scale immediately, so part of it is obscured. Only after a manual re-scaling (even if minute) the figure is displayed correctly.

Code for reproduction

import numpy as np
import matplotlib.pyplot as plt

# Generate some data
t = np.arange(0, 10, 0.1)
x = np.cos(t)

fig, ax = plt.subplots(1,1)

# Put the figure in the top-left half of the screen
cur_win = fig.canvas.manager.window     # Current window
screen_size = cur_win.wm_maxsize()      # Get the screen size
# top-left half of the window:
(pos_x, pos_y, width, height) = (0, 0, screen_size[0]//2, screen_size[1]//2)
position = f'{width}x{height}+{pos_x}+{pos_y}'  # Window geometry string
cur_win.geometry(position)

ax.plot(t, x)
plt.show()

Actual outcome

Expected outcome

When the size of the window is then MANUALLY changed, the figure immediately changes to the accurate scale:

Additional information

The bug appears from Matplotlib 3.5.1 onward

Operating system

Windows 11

Matplotlib Version

3.5.1

Matplotlib Backend

TkAgg

Python version

3.9.10

Jupyter version

No response

Installation

No response