<script> import go from 'gojs'; let $ = go.GraphObject.make; // 后面很多用到該變量來初始化diagram export default{  name: 'diagram',  props: ['modelData'], // accept model data as a parameter  data() {   return {   diagram: null,   };   }, // provide access to the GoJS Diagram

mounted: function() {  let self = this;  let myDiagram =   $(go.Diagram, this.$el,   {    'initialContentAlignment': go.Spot.Center,    'isEnabled': false, // 是否可拖拽，默認為是    // 'toolManager.mouseWheelBehavior': go.ToolManager.WheelNone,    'allowLink': false,     'allowMove': false,    'allowRelink': false, // 由于項目只想展示數據，我禁用了大部分圖像交互操作，具體可參看官網API    'layout': $(go.TreeLayout, {angle: 0, arrangement: go.TreeLayout.ArrangementHorizontal}),  // angle可控制圖像展示方向    'undoManager.isEnabled': true,    // Model ChangedEvents get passed up to component users    'ChangedSelection': function(e) {     self.$emit('changed-selection', e);     },   });     myDiagram.nodeTemplate = // 節點的初始化設置   $(go.Node, 'Auto',   $(go.Shape, // 節點形狀設置   {    fill: 'white', strokeWidth: 1,    portId: '', fromLinkable: true, toLinkable: true, cursor: 'pointer',   },    new go.Binding('fill', '', this.nodeColorConverter)), // nodeColorConverter是我自定義函數，根據節點狀態設置節點的背景顏色   $(go.TextBlock, // 節點提示文字設置    {margin: 16, editable: false},    new go.Binding('text').makeTwoWay())   );  myDiagram.linkTemplate =   $(go.Link,   {relinkableFrom: true, relinkableTo: true},   $(go.Shape, // 連線形狀設置   {strokeWidth: 2},   new go.Binding('stroke', '', this.linkColorConverter)), // 連線的顏色設置   $(go.Shape, // arrowhead   {toArrow: 'Triangle', stroke: null, scale: 1.5}, // 箭頭設置   new go.Binding('fill', '', this.linkColorConverter))   );    myDiagram.groupTemplate = // 分組的初始化   $(go.Group, 'Auto',    { // define the group's internal layout    layout: $(go.TreeLayout,       {angle: 90, arrangement: go.TreeLayout.ArrangementVertical, isRealtime: false}),    // the group begins unexpanded;    // upon expansion, a Diagram Listener will generate contents for the group    // when a group is expanded, if it contains no parts, generate a subGraph inside of it    // subGraphExpandedChanged: function(group) {    // if (group.memberParts.count === 0) {    //  randomGroup(group.data.key);    // }    // },    },   $(go.Shape, 'Rectangle',    {fill: null, stroke: 'gray', strokeWidth: 2}),   $(go.Panel, 'Vertical',    {defaultAlignment: go.Spot.Left, margin: 4},    $(go.Panel, 'Horizontal',    {defaultAlignment: go.Spot.Top},    $('SubGraphExpanderButton', {alignment: go.Spot.Top, margin: 5}),    // the SubGraphExpanderButton is a panel that functions as a button to expand or collapse the subGraph    $(go.TextBlock,     {     font: 'Bold 14px Sans-Serif',     margin: 10,     },     new go.Binding('text', 'text'))    ),   // create a placeholder to represent the area where the contents of the group are    $(go.Placeholder,    {padding: new go.Margin(0, 10)}),   ) // end Vertical Panel   ); // end Group   // generate the initial model  this.diagram = myDiagram;  this.updateModel(this.modelData);

watch: {  modelData: function(val) {    this.updateModel(val);   },  },  methods: {  model: function() {    return this.diagram.model;   },  updateModel: function(val) {   // No GoJS transaction permitted when replacing Diagram.model.   if (val instanceof go.Model) {   this.diagram.model = val;   } else {   let m = new go.GraphLinksModel();   if (val) {    for (let p in val) {    if (val[p]) {     m[p] = val[p];    }    }   }   this.diagram.model = m;   }  },  updateDiagramFromData: function() {   this.diagram.startTransaction();   // This is very general but very inefficient.   // It would be better to modify the diagramData data by calling   // Model.setDataProperty or Model.addNodeData, et al.   this.diagram.updateAllRelationshipsFromData();   this.diagram.updateAllTargetBindings();   this.diagram.commitTransaction('updated');  },  }, };</script>

updateDiagramFromData: function() {   this.$refs.diag.updateDiagramFromData(); // 數據變化時調用組件中的更新方法  },changedSelection: function(e) {   let node = e.diagram.selection.first();   if (node instanceof go.Node) {   this.currentNode = node;   this.currentNodeText = node.data.text;   this.selectNode(node.data);   } else {   this.currentNode = null;   this.currentNodeText = '';   }  },

無分組： "nodeDataArray": [ {"key":1, "text":"Alpha", "color":"lightblue"},{"key":2, "text":"Beta", "color":"orange"},{"key":3, "text":"Gamma", "color":"lightgreen"},{"key":4, "text":"Delta", "color":"pink"} ] "linkDataArray": [ {"from":1, "to":2},{"from":1, "to":3},{"from":3, "to":4} ]有分組： var nodeDataArray = [ { key: "Alpha" }, { key: "Beta", group: "Omega" }, { key: "Gamma", group: "Omega" }, { key: "Omega", isGroup: true },  { key: "Delta" } ]; var linkDataArray = [ { from: "Alpha", to: "Beta" },  { from: "Beta", to: "Gamma" },  { from: "Omega", to: "Delta" }  ];