Add emphasisFocus option

[pissang]

What problem does this feature solve?

It will emphasize all items that are focused on. Not only the hovered item. It will be useful in scenarios like only display connected links when a node is emphasized in the graph.

What does the proposed API look like?

emphasis: {
  focus: 'adjacency',
  emphasisFocus: true
}

[wanyaxing]

Is there any plan on this?

[zhou5757]

请问有点击的相关配置吗 我现在需要点击显示同样的功能