gojsOracleJetForceExample

    <script src="js/libs/custom/go.js"></script>
    <script id="code">
        // This variation on ForceDirectedLayout does not move any selected Nodes
        // but does move all other nodes (vertexes).
        function ContinuousForceDirectedLayout() {
          go.ForceDirectedLayout.call(this);
          this._isObserving = false;
        }
        go.Diagram.inherit(ContinuousForceDirectedLayout, go.ForceDirectedLayout);
        /** @override */
        ContinuousForceDirectedLayout.prototype.isFixed = function(v) {
          return v.node.isSelected;
        }
        // optimization: reuse the ForceDirectedNetwork rather than re-create it each time
        /** @override */
        ContinuousForceDirectedLayout.prototype.doLayout = function(coll) {
          if (!this._isObserving) {
            this._isObserving = true;
            // cacheing the network means we need to recreate it if nodes or links have been added or removed or relinked,
            // so we need to track structural model changes to discard the saved network.
            var lay = this;
            this.diagram.addModelChangedListener(function (e) {
              // modelChanges include a few cases that we don't actually care about, such as
              // "nodeCategory" or "linkToPortId", but we'll go ahead and recreate the network anyway.
              // Also clear the network when replacing the model.
              if (e.modelChange !== "" ||
                  (e.change === go.ChangedEvent.Transaction && e.propertyName === "StartingFirstTransaction")) {
                lay.network = null;
              }
            });
          }
          var net = this.network;
          if (net === null) {  // the first time, just create the network as normal
            this.network = net = this.makeNetwork(coll);
          } else {  // but on reuse we need to update the LayoutVertex.bounds for selected nodes
            this.diagram.nodes.each(function (n) {
              var v = net.findVertex(n);
              if (v !== null) v.bounds = n.actualBounds;
            });
          }
          // now perform the normal layout
          go.ForceDirectedLayout.prototype.doLayout.call(this, coll);
          // doLayout normally discards the LayoutNetwork by setting Layout.network to null;
          // here we remember it for next time
          this.network = net;
        }
        // end ContinuousForceDirectedLayout
        function init() {
          if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
          var $ = go.GraphObject.make;  // for conciseness in defining templates
          myDiagram =
            $(go.Diagram, "myDiagramDiv",  // must name or refer to the DIV HTML element
              {
                initialAutoScale: go.Diagram.Uniform,  // an initial automatic zoom-to-fit
                contentAlignment: go.Spot.Center,  // align document to the center of the viewport
                layout:
                  $(ContinuousForceDirectedLayout,  // automatically spread nodes apart while dragging
                    { defaultSpringLength: 30, defaultElectricalCharge: 100 }),
                // do an extra layout at the end of a move
                "SelectionMoved": function(e) { e.diagram.layout.invalidateLayout(); }
              });
          // dragging a node invalidates the Diagram.layout, causing a layout during the drag
          myDiagram.toolManager.draggingTool.doMouseMove = function() {
            go.DraggingTool.prototype.doMouseMove.call(this);
            if (this.isActive) { this.diagram.layout.invalidateLayout(); }
          }
          // define each Node's appearance
          myDiagram.nodeTemplate =
            $(go.Node, "Auto",  // the whole node panel
              // define the node's outer shape, which will surround the TextBlock
              $(go.Shape, "Circle",
                { fill: "CornflowerBlue", stroke: "black", spot1: new go.Spot(0, 0, 5, 5), spot2: new go.Spot(1, 1, -5, -5) }),
              $(go.TextBlock,
                { font: "bold 10pt helvetica, bold arial, sans-serif", textAlign: "center", maxSize: new go.Size(100, NaN) },
                new go.Binding("text", "text"))
            );
          // the rest of this app is the same as samples/conceptMap.html
          // replace the default Link template in the linkTemplateMap
          myDiagram.linkTemplate =
            $(go.Link,  // the whole link panel
              $(go.Shape,  // the link shape
                { stroke: "black" }),
              $(go.Shape,  // the arrowhead
                { toArrow: "standard", stroke: null }),
              $(go.Panel, "Auto",
                $(go.Shape,  // the label background, which becomes transparent around the edges
                  { fill: $(go.Brush, "Radial", { 0: "rgb(240, 240, 240)", 0.3: "rgb(240, 240, 240)", 1: "rgba(240, 240, 240, 0)" }),
                    stroke: null }),
                $(go.TextBlock,  // the label text
                  { textAlign: "center",
                    font: "10pt helvetica, arial, sans-serif",
                    stroke: "#555555",
                    margin: 4 },
                  new go.Binding("text", "text"))
              )
            );
          // create the model for the concept map
          var nodeDataArray = [
            { key: 1, text: "Concept Maps" },
            { key: 2, text: "Organized Knowledge" },
            { key: 3, text: "Context Dependent" },
            { key: 4, text: "Concepts" },
            { key: 5, text: "Propositions" },
            { key: 6, text: "Associated Feelings or Affect" },
            { key: 7, text: "Perceived Regularities" },
            { key: 8, text: "Labeled" },
            { key: 9, text: "Hierarchically Structured" },
            { key: 10, text: "Effective Teaching" },
            { key: 11, text: "Crosslinks" },
            { key: 12, text: "Effective Learning" },
            { key: 13, text: "Events (Happenings)" },
            { key: 14, text: "Objects (Things)" },
            { key: 15, text: "Symbols" },
            { key: 16, text: "Words" },
            { key: 17, text: "Creativity" },
            { key: 18, text: "Interrelationships" },
            { key: 19, text: "Infants" },
            { key: 20, text: "Different Map Segments" }
          ];
          var linkDataArray = [
            { from: 1, to: 2, text: "represent" },
            { from: 2, to: 3, text: "is" },
            { from: 2, to: 4, text: "is" },
            { from: 2, to: 5, text: "is" },
            { from: 2, to: 6, text: "includes" },
            { from: 2, to: 10, text: "necessary\nfor" },
            { from: 2, to: 12, text: "necessary\nfor" },
            { from: 4, to: 5, text: "combine\nto form" },
            { from: 4, to: 6, text: "include" },
            { from: 4, to: 7, text: "are" },
            { from: 4, to: 8, text: "are" },
            { from: 4, to: 9, text: "are" },
            { from: 5, to: 9, text: "are" },
            { from: 5, to: 11, text: "may be" },
            { from: 7, to: 13, text: "in" },
            { from: 7, to: 14, text: "in" },
            { from: 7, to: 19, text: "begin\nwith" },
            { from: 8, to: 15, text: "with" },
            { from: 8, to: 16, text: "with" },
            { from: 9, to: 17, text: "aids" },
            { from: 11, to: 18, text: "show" },
            { from: 12, to: 19, text: "begins\nwith" },
            { from: 17, to: 18, text: "needed\nto see" },
            { from: 18, to: 20, text: "between" }
          ];
          myDiagram.model = new go.GraphLinksModel(nodeDataArray, linkDataArray);
        }
        function reload() {
          //myDiagram.layout.network = null;
          var text = myDiagram.model.toJson();
          myDiagram.model = go.Model.fromJson(text);
          //myDiagram.layout =
          //  go.GraphObject.make(ContinuousForceDirectedLayout,  // automatically spread nodes apart while dragging
          //    { defaultSpringLength: 30, defaultElectricalCharge: 100 });
        }
      </script>