upgrade apexcharts

[oliver-sanders]

Upgrade to the last good version of apexcharts.

The licence was still MIT @ 4.7.0: https://github.com/apexcharts/apexcharts.js/blob/v4.7.0/LICENSE

After which it went evil, hence #1978 cannot be merged.

@ChrisPaulBennett, please can you review this and make sure the upgrade hasn't broken anything, if changes are needed, push them to this branch. @MetRonnie noted panning issues (#1978 (comment)), although, having tested, I'm not sure panning works on master either?

Check List

• I have read CONTRIBUTING.md and added my name as a Code Contributor.
• Contains logically grouped changes (else tidy your branch by rebase).
• Does not contain off-topic changes (use other PRs for other changes).
• Applied any dependency changes to both setup.cfg (and conda-environment.yml if present).
• Tests are included (or explain why tests are not needed).
• Changelog entry included if this is a change that can affect users
• Cylc-Doc pull request opened if required at cylc/cylc-doc/pull/XXXX.
• If this is a bug fix, PR should be raised against the relevant ?.?.x branch.

[MetRonnie]

Panning in the Gantt chart is still broken, might be apexcharts/apexcharts.js#4975

To reproduce: scroll with mouse wheel over the gantt view. The chart disappears entirely!

[oliver-sanders]

Yep - #2256, frustrating.

Guessing it's no worse than before?

[MetRonnie]

Not reproduced that before other than when apexcharts is upgraded.

Edit: reproduced on master by deliberately zooming in order to make the data go off the edges. But on this branch it's a lot worse as it happens on the slightest scroll

[oliver-sanders]

This is probably going to serve as the blocker PR for all apexcharts upgrade.

• Can't move to v4 because of bugs.
• Can't move to v5 because of license.

[ChrisPaulBennett]

Are we still looking to upgrade apex?
In my testing it looks like panning and zooming has been disabled

[oliver-sanders]

We can upgrade to v4, but this panning issue would have to be resolved first.

We cannot upgrade to v5 - ever!

[ChrisPaulBennett]

I'm really struggling to fix this. I can kind of fix the panning issue but zooming is just not playing ball.
I'm wondering if it's better for us to leave this and put more effort into replacing apex charts, because that has to happen anyway?

[oliver-sanders]

#2406

[ChrisPaulBennett]

Apexcharts will not be updated. Instead a new library, Apache eCharts, will be used.
See #2544