travis1111 opened a new issue #12389: Graph force layout, drag multiple nodes - how to move multiple node positions? URL: https://github.com/apache/incubator-echarts/issues/12389 ### What problem does this feature solve? ECharts only support drag a single node in graph force layout. I need to be able drag multiple nodes in my application. Now I am able to use zrender to draw a rectangle box on the screen, and I have code to determine the nodes that are inside the rectangle box. Now I am stuck at how to move these nodes in the zrender's mousemove event callback. I tried to call the `data.setItemLayout` but it seems the _itemLayout arrays are changed, but the nodes on the screen did not move. So how can I move them? I am also wondering if there is api for my to detect if mousedown is triggered on a node? (in this case, I should not draw the selection box). Also, is there an API to determine whether a node is visible or not? I want to make sure when I select the nodes, I can ignore the ones that are invisible. Thanks ### What does the proposed API look like? NA <!-- This issue is generated by echarts-issue-helper. DO NOT REMOVE --> <!-- This issue is in English. DO NOT REMOVE -->
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