Bug summary

"x/ylim_changed" should be emitted whenever the limits of an axis is changed. However, when the limits are changed via as a consequence of ax.set_xticks, the signal is not emitted.

Code for reproduction

import matplotlib.pyplot as plt

def xlim_changed(ax):
    print(f'xlim changed to: {ax.get_xlim()}')

fig, ax = plt.subplots()
ax.callbacks.connect("xlim_changed", xlim_changed)
ax.set_xlim(0.5, 1)        # emits "xlim_changed" as expected
ax.set_xticks([0, 100])  # does not emit "xlim_changed"

Actual outcome

xlim changed to: (np.float64(0.5), np.float64(1.0))

Expected outcome

xlim changed to: (np.float64(0.5), np.float64(1.0))
xlim changed to: (np.float64(0.0), np.float64(100.0))

Additional information

I became aware of this bug while working on #31214

for reference the plot produced by the above code looks like this:

Operating system

Ubuntu

Matplotlib Version

3.11.0.dev

Matplotlib Backend

No response

Python version

3.13

Jupyter version

No response

Installation

git checkout