关系图(graph)自定义node的tooltip，导致edge的tooltip显示错误

[cometor]

Version

4.4.0

Steps to reproduce

My option is like this：

option = {
    tooltip: {},
    series: [
        {
            type: 'graph',
            layout: 'none',
            symbolSize: 50,
            label: {
                show: true
            },
            data: [{
                name: 'A',
                x: 100,
                y: 100,
                tooltip: {
                  formatter :function(params) {
                      return 'this is A'
                  }    
                }
            }, {
                name: 'B',
                x: 300,
                y: 200
            }, {
                name: 'C',
                x: 50,
                y: 250
            }],
            links: [
                {
                source: 'B',
                target: 'C'
            },{
                source: 'B',
                target: 'A'
            }, {
                source: 'A',
                target: 'C'
            }]
        }
    ]
};

the actual chart is like this

I debugged it and found an error in \src\component\tooltip\TooltipView.js

    _showSeriesItemTooltip: function (e, el, dispatchAction) {
        var ecModel = this._ecModel;
        // Use dataModel in element if possible
        // Used when mouseover on a element like markPoint or edge
        // In which case, the data is not main data in series.
        var seriesIndex = el.seriesIndex;
        var seriesModel = ecModel.getSeriesByIndex(seriesIndex);

        // For example, graph link.
        var dataModel = el.dataModel || seriesModel;
        var dataIndex = el.dataIndex;
        var dataType = el.dataType;
        var data = dataModel.getData();

dataModel.getData() always return the data of nodes, but not edges.

What is expected?

when hover to the edge 'B>C'，the tooltip is ‘B>C’

What is actually happening?

when hover to the edge 'B>C'，the tooltip is ‘this is A’

[echarts-bot]

Hi! We've received your issue and please be patient to get responded. 🎉
The average response time is expected to be within one day for weekdays.

In the meanwhile, please make sure that you have posted enough image to demo your request. You may also check out the API and chart option to get the answer.

If you don't get helped for a long time (over a week) or have an urgent question to ask, you may also send an email to [email protected]. Please attach the issue link if it's a technical questions.

If you are interested in the project, you may also subscribe our mail list.

Have a nice day! 🍵

[susiwen8]

Known issue, will be fixed in 4.8.0, related PR is #12011