如何为goJS中的新链接设置动画

debugcn 发表于 Dev

黛博拉·范思洛特

在我的应用程序中，我在图中动态添加节点或链接。但是，我没有这样做的效果转换。如何在动画中使用addLinkData？

沃尔特·诺斯伍德

这是一个完整的示例：

  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" }
    ]);
  }

通常，这是典型的简单模板和模型，您可以从https://gojs.net/learn和https://gojs.net/intro阅读。与自定义动画有关的唯一事情是“ LinkDrawn” DiagramEvent侦听器，该侦听器创建一个Animation并为Link的路径（Link.path，Shape）的外观设置动画。