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Move draw_if_interactive logic to new_figure_manager_given_figure. #468

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merged 1 commit into from Jun 16, 2022

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anntzer
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@anntzer anntzer commented Jun 2, 2022

Currently, Matplotlib only ever calls draw_if_interactive at the end of
plt.figure() (and upon figure unpickling), i.e. this is a mechanism to
further customize handling of newly generated figures. (Prior to
Matplotlib 1.5, draw_if_interactive was also called at the end of all
pyplot functions to trigger a figure redraw, but this is now handled by
the stale attribute.)

In order to simplify the backend API ("what is the API that a backend
module must/can provide", I am planning to deprecate (on Matplotlib's
side) the ability for backends to provide a draw_if_interactive
function (forcing them to always do if interactive(): draw_idle()) (matplotlib/matplotlib#23105).
Instead, any relevant new-figure-customization logic can instead go
into new_figure_manager_given_figure. This PR implements this change
for ipympl, and should be fully back-compatible all the way back to
Matplotlib 1.5. I would like to make these changes first on the side
of the clients (i.e., the third-party backends), to catch any possible
problems with the intended change on Matplotlib's side.

Currently, Matplotlib only ever calls draw_if_interactive at the end of
`plt.figure()` (and upon figure unpickling), i.e. this is a mechanism to
further customize handling of newly generated figures.  (Prior to
Matplotlib 1.5, draw_if_interactive was also called at the end of all
pyplot functions to trigger a figure redraw, but this is now handled by
the stale attribute.)

In order to simplify the backend API ("what is the API that a backend
module must/can provide", I am planning to deprecate (on Matplotlib's
side) the ability for backends to provide a draw_if_interactive
function (forcing them to always do `if interactive(): draw_idle()`).
Instead, any relevant new-figure-customization logic can instead go
into `new_figure_manager_given_figure`.  This PR implements this change
for ipympl, and should be fully back-compatible all the way back to
Matplotlib 1.5.  I would like to make these changes first on the side
of the clients (i.e., the third-party backends), to catch any possible
problems with the intended change on Matplotlib's side.
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github-actions bot commented Jun 2, 2022

Binder 👈 Launch a binder notebook on branch anntzer/ipympl/udif

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anntzer commented Jun 3, 2022

As for #466, the visual regression tests fail even on master, independently of this PR.

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anntzer commented Jun 16, 2022

@ianhi any chance you can have a look at this? thanks :)

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seems good to me! thakns for the ping

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ianhi commented Jun 16, 2022

and thanks also for the PR! makes following the backend changes in matplotlib much nicer :)

@ianhi ianhi merged commit 8a3740d into matplotlib:main Jun 16, 2022
@anntzer anntzer deleted the udif branch June 16, 2022 22:13
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2 participants