入坑gojs交互类图表库，相当强大的js库

myDiagram.model.addNodeData(node);

myDiagram.commandHandler.deleteSelection();

myDiagram.model.toJson()

myDiagram.model = go.Model.fromJson(model);

myDiagram.model.findNodeDataForKey('key')

myDiagram.model.setDataProperty(node, 'color', "#ededed");

var newdata = { "text":"AAAA", "key":-33,"loc":"0 0" };
            myDiagram.model.addNodeData(newdata);
            var newdat2= myDiagram.model.findNodeDataForKey('-3');
            console.log(newdat2);
            var node = myDiagram.findNodeForData(newdat2);
            console.log(node);
 myDiagram.select(node);//选中节点

myDiagram.findNodeForData(objNode)
myDiagram.findLinkForData(objLink)

myDiagram.nodeTemplate =
   $(go.Node, "Horizontal",
        { selectionChanged: nodeSelectionChanged },
          //节点选中改变事件，nodeSelectionChanged为回调的方法名
        $(go.Panel, "Auto",
           $(go.Shape,//节点形状和背景颜色的设置
                { fill: "#1F4963" },
                 new go.Binding("fill", "color")
           ),
        )
    );//go.Node的括号
 
//回调方法
function nodeSelectionChanged(node) {
      if(node.isSelected) {//
         //节点选中执行的内容
         console.log(node.data);//节点的属性信息
         console.log(node.data.key);//拿到节点的Key,拿其他属性类似
         var node1 = myDiagram.model.findNodeDataForKey(node.data.key);
         myDiagram.model.setDataProperty(node1, "fill", "#ededed");
      } else {
         //节点取消选中执行的内容
         var node1 = myDiagram.model.findNodeDataForKey(node.data.key);
         myDiagram.model.setDataProperty(node1, 'fill', "1F4963 ");       
      }
}

myDiagram.nodeTemplate =
   $(go.Node, "Horizontal",
        $(go.Panel, "Auto",
           $(go.Shape,//节点形状和背景颜色的设置
                { fill: "#1F4963" },
                 new go.Binding("fill", "color")
           ),
           {doubleClick : function(e, node){// 双击事件
                             handlerDC(e, node);//双击执行的方法
                          }
           }
        )
    );//go.Node的括号
 
//双击执行的方法
function handlerDC(e, obj) {
     var node = obj.part;//拿到节点的json对象，后面要拿什么值就直接.出来
     var procTaskId = node.data.key;
     var procTaskName = node.data.text;
     var description = node.data.description;
     var procTmplId = node.data.tmplId;
}

myDiagram.addDiagramListener("externalobjectsdropped", function(e) {
        console.log(e);
    })

myDiagram.addDiagramListener("Modified", function(e) {
        myDiagram.isModified = false;
 
        iter = myDiagram.selection.iterator;
        
        while (iter.next()) {
            var part = iter.value;
            if (part instanceof go.Link) {
               if ( ( part.data.from == 0 || part.data.from == undefined) || ( part.data.to == 0 || part.data.to == undefined )  ) {
                    myDiagram.model.setDataProperty(part.data, 'link-color', 'red');
                    console.log(part.data);
                    console.log("非法");
               } else if(part.data.from > 0 || part.data.from < 0 ) {
                    var node = myDiagram.findNodeForKey(part.data.from);
                    if (!node) {
                        console.log("非法");
                    }
               }else if(part.data.to > 0 || part.data.to < 0 ) {
                    var node = myDiagram.findNodeForKey(part.data.to);
                    if (!node) {
                        console.log("非法");
                    }
               }
            }
        }