feat(axis): custom axis tick/label positions. close #13627

[dvdkon]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

Add option customValues to axisTick and axisLabel, which allow the user to specify tick/label positions.

Fixed issues

#13627 (my own issue)

Details

Before: What was the problem?

See issue #13627

After: How is it fixed in this PR?

The new option allows for completely custom tick/label positions, for example:

xAxis: {
	type: 'value',
	axisLabel: {
		customValues: [0, 4, 7, 8, 9]
	},
	axisTick: {
		alignWithLabel: true,
		customValues: [0, 0.5, 1, 1.5, 2, 8, 9]
	},
}

Usage

Are there any API changes?

• The API has been changed.

In axis:

• axisTick.customValues: (string | number | Date)[]
• axisLabel.customValues: (string | number | Date)[]

Array of axis values on which a tick/label will be present (automatic tick generation is disabled)

Related test cases or examples to use the new APIs

test/axis-customTicks.html

[echarts-bot]

Thanks for your contribution!
The community will review it ASAP. In the meanwhile, please checkout the coding standard and Wiki about How to make a pull request.

Document changes are required in this PR. Please also make a PR to apache/incubator-echarts-doc for document changes. When the doc PR is merged, the maintainers will remove the PR: awaiting doc label.

[pissang]

Thanks for the idea and implementation! We are planning features similar. Perhaps we can discuss it together

[dvdkon]

Thanks! That would be nice, I made this PR because it was quick and I wanted the feature sooner, but as long as ECharts has this functionality in some way, I'm happy.

[poczepeter]

Any updates on this?

[NotSqrt]

@pissang This feature would be really useful to avoid funky tick positions for a weekly bar graph with axis type: 'time' like this one:

Can it be merged and released please ?
Thanks a lot !

[jordigoyanes]

LGTM

[Ovilia]

This is indeed a fantastic feature and I deeply apologise for not having reviewed it over the past few years. There are only a few areas that require improvement. Given the significant amount of time that has lapsed, I have created a new PR based on this one. Please rest assured that your commit information has been retained in the records, and we greatly value your contribution. We warmly invite you to continue the conversation in the new PR.