[Feature] 增加tree symbolGap

[fantasy525]

What problem does this feature solve?

可以解决树层级很深时symbol互相堆叠的问题

What does the proposed API look like?

symbolGap: number|function

[echarts-bot]

@fantasy525 It seems you are not using English, I've helped translate the content automatically. To make your issue understood by more people and get helped, we'd like to suggest using English next time. 🤗

TRANSLATED

TITLE

[Feature] Add tree symbolGap

BODY

What problem does this feature solve?

You can solve the problem of symbol stacking on top of each other when the tree level is deep

What does the proposed API look like?

symbolGap: number|function

[Ovilia]

The distance between symbols are decided by the canvas height dividing symbol numbers. So it won't help to add a gap option. One simple way to avoid this is to provide a canvas with larger height.

[shmilyoo]

遇到同样的问题 #19140 ， 有解决的办法么