通过单击GOJS中的形状使点上的形状

Question

我正在使用GOJS，并且每当我单击形状时我想创建一个点。点应该完全出现在我点击形状的位置上。我可以做那？ 这里是我的代码添加点或端口硬编码

function makePort(name, spot, output, input) { 
     return GO(go.Shape, "Circle", 
       { 
        fill: "grey", 
        stroke: null, 
        desiredSize: new go.Size(10, 10), 
        alignment: spot, 
        alignmentFocus: spot, 
        portId: name, 
        fromSpot: spot, toSpot: spot, 
        fromLinkable: output, toLinkable: input, 
        cursor: "pointer" 
       }); 
    } 
myDiagram.nodeTemplate = 
    GO(go.Node, "Spot", 
    { 

     selectionAdorned: false, // don't show the standard selection handle 
     resizable: true, resizeObjectName: "SHAPE", // user can resize the Shape 
     rotatable: true, rotateObjectName: "SHAPE", // user can rotate the Shape 
                // without rotating the label 
     layoutConditions: go.Part.LayoutStandard & ~go.Part.LayoutNodeSized 
     }, 
     new go.Binding("location", "loc").makeTwoWay(), // TwoWay Binding // Binds diagram and model location with eachother 
     a = GO(go.Shape, 
     { 
      click:click1, 
      name: "SHAPE", 
      width: 70, height: 70, 
      stroke: "#000000", 
      fill: "transparent", 
      //angle: 45, 
      strokeWidth: 1 
     }, 
     new go.Binding("figure","fig"), 
     new go.Binding("name_shape", "key"), 
     new go.Binding("angle", "ang").makeTwoWay(), // Binds diagram and model angle with eachother 
     // new go.Binding("desiredSize", "size").makeTwoWay(), // Binds diagram and model size with eachother 
     new go.Binding("geometryString", "geometry").makeTwoWay()),// Binds diagram and model geometry string with eachother 
     // GO(go.Shape,"Circle", // the "A" port 
     //  { width: 20, height: 20, portId: "A",stroke:null,toSpot: go.Spot.Left}), 
     /*GO(go.Panel, "Vertical", 
     GO(go.TextBlock, 
      new go.Binding("text", "fig")), 
     GO(go.TextBlock, { stroke: "blue" }, 
      new go.Binding("text", "parameter1", function(p1) { return p1; }).ofObject("SHAPE")) 
    )*/ 
     // GO(go.Shape, // the "A" port 
     //  { width: 6, height: 6, portId: "A" }), 

     // four small named ports, one on each side: 
     makePort("T", go.Spot.Top, false, true), 
     makePort("L", go.Spot.Left, true, true), 
     makePort("TL", go.Spot.TopLeft, true, true), 
     makePort("BL", go.Spot.BottomLeft, true, true), 
     makePort("R", go.Spot.Right, true, true), 
     makePort("TR", go.Spot.TopRight, true, true), 
     makePort("BR", go.Spot.BottomRight, true, true), 
     makePort("B", go.Spot.Bottom, true, true), 
     makePort("C",go.Spot.Center,true,true), 

     { // handle mouse enter/leave events to show/hide the ports 
      mouseEnter: function(e, node) { showSmallPorts(node, true); }, 
      mouseLeave: function(e, node) { showSmallPorts(node, false); } 
     } 
    ); 

    function showSmallPorts(node, show) { 
     node.ports.each(function(port) { 
     if (port.portId !== "") { // don't change the default port, which is the big shape 
      port.fill = show ? "rgba(0,0,0,.3)" : null; 
     } 
     }); 

Answer 1

这应该做什么，我认为你所要求的：

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

    myDiagram = 
     $(go.Diagram, "myDiagramDiv", 
     { initialContentAlignment: go.Spot.Center, "undoManager.isEnabled": true }); 

    myDiagram.nodeTemplate = 
     $(go.Node, "Spot", 
     { selectionObjectName: "BODY" }, 
     new go.Binding("itemArray", "spots"), 
     { // each spot is represented by a Panel holding a circular Shape 
      // at a particular alignment relative to the "BODY" 
      itemTemplate: 
      $(go.Panel, 
       $(go.Shape, "Circle", 
       { 
        fill: $(go.Brush, go.Brush.Radial, { 0.0: "gray", 1.0: "transparent" }), 
        strokeWidth: 0, width: 16, height: 16 
       }), 
       new go.Binding("alignment", "spot", go.Spot.parse).makeTwoWay(go.Spot.stringify) 
      ), 
      // when the user clicks on the node, add a "spot" 
      click: function(e, obj) { 
      e.diagram.startTransaction(); 
      // convert click point into Spot in node's bounds 
      var pt = e.documentPoint; // in document coordinates 
      var node = obj.part; 
      var b = node.actualBounds; // will be in document coordinates 
      var spot = new go.Spot(Math.max(0, Math.min((pt.x - b.x)/b.width, 1)), 
            Math.max(0, Math.min((pt.y - b.y)/b.height, 1))); 
      // add an Object describing the spot's location (as a Spot value) 
      var spotsArray = node.data.spots; 
      if (!Array.isArray(spotsArray)) spotsArray = node.data.spots = []; 
      e.diagram.model.addArrayItem(spotsArray, { spot: go.Spot.stringify(spot) }); 
      e.diagram.commitTransaction("added spot"); 
      } 
     }, 
     $(go.Panel, "Auto", 
      { name: "BODY", width: 100, height: 100 }, 
      $(go.Shape, { fill: "whitesmoke" }), 
      $(go.TextBlock, { editable: true }, 
      new go.Binding("text").makeTwoWay()) 
     ) 
    ); 

    myDiagram.model = $(go.GraphLinksModel, 
     { 
     copiesArrays: true, // make sure the data.spots Array is copied 
     copiesArrayObjects: true, // make sure the Objects in those Arrays are also copied 
     nodeDataArray: [ 
      { key: 1, text: "Alpha", spots: [] }, 
      { key: 2, text: "Beta", spots: [{ spot: "0.3, 0.2" }] } 
     ], 
     linkDataArray: [ 
      { from: 1, to: 2 } 
     ] 
     }); 
    } 

执行此并单击节点上在一些地方导致：

请注意，“Beta”节点始于模型数据中定义的点。

顺便说一下，我不清楚用户想要添加的“点”实际上必须是“端口”。您可以通过给每个“点”设置一个唯一的“端口”GraphObject.portId。

您可能需要阅读GoJS简介的所有页面，网址为http://gojs.net/latest/intro。