Click handler is broken with matplotlib>=3.5

Commencez par reproduire l’échec du click-handler avec le paquet pixelstitch et les versions classiques de Notebook et JupyterLab indiquées dans l’issue. Comparez les environnements concernés avec matplotlib 3.5–3.9 et vérifiez que les clics produisent l’interaction attendue dans chaque environnement pris en charge.

Describe the issue

The click handler doesn't seem to have any effect:
The issue can be reproduced using the pixelstitch package following the installation instructions in this issue:
https://github.com/ducha-aiki/pixelstitch/issues/1#issuecomment-2269974339

Versions

Affected matplotlib versions are 3.5-3.9
Affected jupyer versions are:

• classical notebook <7
• jupyter lab 4.2.4

python -c "import sys; print('\n',sys.version); import ipympl; print('ipympl version:', ipympl.__version__)" && jupyter --version && jupyter nbextension list && jupyter labextension list

classical notebook -->

 jupyter labextension list

 3.10.14 (main, May  6 2024, 14:47:20) [Clang 14.0.6 ]
ipympl version: 0.9.4
Selected Jupyter core packages...
IPython          : 8.26.0
ipykernel        : 6.29.5
ipywidgets       : 8.1.3
jupyter_client   : 7.4.9
jupyter_core     : 5.7.2
jupyter_server   : 2.14.2
jupyterlab       : not installed
nbclient         : 0.10.0
nbconvert        : 7.16.4
nbformat         : 5.10.4
notebook         : 6.5.7
qtconsole        : 5.5.2
traitlets        : 5.14.3
Known nbextensions:
  config dir: /Users/dawars/miniconda3/envs/pixelstitch/etc/jupyter/nbconfig
    notebook section
      jupyter-matplotlib/extension  enabled
      - Validating: OK
      jupyter-js-widgets/extension  enabled
      - Validating: OK
usage: jupyter [-h] [--version] [--config-dir] [--data-dir] [--runtime-dir] [--paths] [--json] [--debug] [subcommand]

Jupyter: Interactive Computing

positional arguments:
  subcommand     the subcommand to launch

options:
  -h, --help     show this help message and exit
  --version      show the versions of core jupyter packages and exit
  --config-dir   show Jupyter config dir
  --data-dir     show Jupyter data dir
  --runtime-dir  show Jupyter runtime dir
  --paths        show all Jupyter paths. Add --json for machine-readable format.
  --json         output paths as machine-readable json
  --debug        output debug information about paths

Available subcommands: bundlerextension console dejavu events execute kernel kernelspec migrate nbclassic nbconvert nbextension notebook qtconsole run server serverextension troubleshoot trust

Jupyter command `jupyter-labextension` not found.```

Jupyter lab -->

3.10.14 (main, May 6 2024, 14:47:20) [Clang 14.0.6 ]
ipympl version: 0.9.4
Selected Jupyter core packages...
IPython : 8.26.0
ipykernel : 6.29.5
ipywidgets : 8.1.3
jupyter_client : 8.6.2
jupyter_core : 5.7.2
jupyter_server : 2.14.2
jupyterlab : 4.2.4
nbclient : 0.10.0
nbconvert : 7.16.4
nbformat : 5.10.4
notebook : not installed
qtconsole : not installed
traitlets : 5.14.3
usage: jupyter [-h] [--version] [--config-dir] [--data-dir] [--runtime-dir] [--paths] [--json] [--debug] [subcommand]

Jupyter: Interactive Computing

positional arguments:
subcommand the subcommand to launch

options:
-h, --help show this help message and exit
--version show the versions of core jupyter packages and exit
--config-dir show Jupyter config dir
--data-dir show Jupyter data dir
--runtime-dir show Jupyter runtime dir
--paths show all Jupyter paths. Add --json for machine-readable format.
--json output paths as machine-readable json
--debug output debug information about paths

Available subcommands: dejavu events execute kernel kernelspec lab labextension labhub migrate nbconvert run server troubleshoot trust

Jupyter command jupyter-nbextension not found.```