如何在 goJS 中为新的 link 设置动画

How animate a new link in goJS

在我的应用程序中,我在图表中动态添加节点或链接。但是,我这样做没有新的效果转换。如何将 addLinkData 与动画一起使用?

这是一个完整的例子:

  function init() {
    var $ = go.GraphObject.make;

    myDiagram =
      $(go.Diagram, "myDiagramDiv",
          {
            "LinkDrawn": function(e) {
              var link = e.subject;
              link.isSelected = false;
              var orig = link.toShortLength;
              link.toShortLength = 2;
              var anim = new go.Animation();
              var sw = link.path.strokeWidth;
              anim.add(link.path, "strokeWidth", sw, sw+5);
              anim.add(link.elt(1), "strokeWidth", sw, sw+5);
              anim.reversible = true;
              anim.finished = function(a) { link.toShortLength = orig; link.isSelected = true; };
              anim.start();
            }
          });

    myDiagram.nodeTemplate =
      $(go.Node, "Auto",
        $(go.Shape,
          { fill: "white", portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer" },
          new go.Binding("fill", "color")),
        $(go.TextBlock,
          { margin: 8 },
          new go.Binding("text"))
      );

    myDiagram.linkTemplate =
      $(go.Link,
        $(go.Shape),
        $(go.Shape, { toArrow: "OpenTriangle" })
      );

    myDiagram.model = new go.GraphLinksModel(
    [
      { key: 1, text: "Alpha", color: "lightblue" },
      { key: 2, text: "Beta", color: "orange" },
      { key: 3, text: "Gamma", color: "lightgreen" },
      { key: 4, text: "Delta", color: "pink" }
    ]);
  }

这主要是典型的简单模板和模型,您可以在 https://gojs.net/learn and https://gojs.net/intro 上阅读。唯一与自定义动画相关的是 "LinkDrawn" DiagramEvent 侦听器,它创建一个 Animation 并为 Link的路径(Link.path,一个形状)。

阅读更多关于动画的信息:https://gojs.net/latest/intro/animation.html and https://gojs.net/latest/api/symbols/Animation.html