Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

This PR adds the ability to change the base of the tick intervals to align on (1, 2, 3, 4,... * base^x).

Fixed issues

#21208

Details

Before: What was the problem?

When using KMB formatting for a unit that is non base 10 such as binary bytes, the tick intervals will align on a multiple of a base 10 number, so when the formatting occurs the number do not align nicely with the KMB formatting. Setting the interval manually can be difficult/expensive when you have a highly variable, dynamic dataset.

For example, where formatter code looks like so:

function (value) {
 if (value >= 1024 * 1024 * 1024) {
 return (value / (1024 * 1024 * 1024)).toFixed(2) + ' GiB';
 } else if (value >= 1024 * 1024) {
 return (value / (1024 * 1024)).toFixed(2) + ' MiB';
 } else if (value >= 1024) {
 return (value / 1024).toFixed(2) + ' KiB';
 } else {
 return value + ' B';
 }
}

After: How does it behave after the fixing?

When using the same formatter but with tickBase = 2

Document Info

One of the following should be checked.

• This PR doesn't relate to document changes
• The document should be updated later
• The document changes have been made in apache/echarts-doc#xxx

Misc

ZRender Changes

• This PR depends on ZRender changes (ecomfe/zrender#xxx).

Related test cases or examples to use the new APIs

N.A.

Others

Merging options

• Please squash the commits into a single one when merging.

Other information

Let me know what you think! Thanks!