weihaopeng opened a new issue, #17564: URL: https://github.com/apache/echarts/issues/17564
### What problem does this feature solve? I want to highlight a node, and its path to the root node. I use `dispatchAction` function with `type highlight`, set the nodeIndex in the path to `dataIndex` attr. Like this (node11 is the root node):  The result is : * node11 was highlight * node11's related node(include node24) and line were highlight * node40 was highlight, but the line connecting node24 and node40 weren't highlight`. Then I reverse the dataIndex, set `[40, 24, 11]`. I get the result: * node40 was highlight * the line connecting node40 and node24 was highlight, node24 was highlight * node24's related node was highlight * node11 was highlight, node11's related nodes weren't highlight. I think this is a defect. It seems that it highlight first node and first node's related nodes and their lines, and other node in the `dataIndex` list. But according to [the doc](https://echarts.apache.org/zh/api.html#action.highlight), `dataIndex` means "数据项的index", 'index of data'. It should Has nothing to do with line, and any related nodes(maybe this is conflict with the `emphasis.focus: 'adjacency'` ?) ### Above content should be a bug or a defect, I think. here comes the feature I want. Add `linkIndex` or `edgeIndex` attr to the option in dispatchAction function. So that developers can clearly define which line should be highlight. [code is here](https://codesandbox.io/s/les-miserables-forked-z3y4p0?file=/index.js), it use `les-miserables` in document. After mounted, waiting 3s, I use a dispatchAciton function to highlight three nodes. The node11 is the green node `Valjean`, the node24 is the purple node `Thenardier`, the node40 is the top node with label hidden.  ### What does the proposed API look like? dispatchAction({ type: 'highlight', ... dataIndex?: number | number[], // only effect these data, no effect to related data. name?: string | string[], lineIndex?: number | number[] }); -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@echarts.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@echarts.apache.org For additional commands, e-mail: commits-h...@echarts.apache.org
