fix(radar): name being - in tooltip when name.show is false #15915

[Ovilia]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

Radar indicator names were displayed in the tooltip as "-" when indicator.name.show is set to be false.

Fixed issues

• Tooltip shows '-' for labels if radar.name.show = false #15915

Details

Before: What was the problem?

Radar indicator names were displayed in the tooltip as "-" when indicator.name.show is set to be false.

After: How is it fixed in this PR?

Radar indicator name should be displayed in the tooltip.

Misc

• The API has been changed (apache/echarts-doc#xxx).
• This PR depends on ZRender changes (ecomfe/zrender#xxx).

Related test cases or examples to use the new APIs

NA.

Others

Merging options

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

Other information

[echarts-bot]

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[echarts-bot]

Congratulations! Your PR has been merged. Thanks for your contribution! 👍