GoJS/samples/logicCircuit.html at master · MisterBliss/GoJS · GitHub

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<!doctype html>
<html>
<head>
  <title>Logic Circuit</title>
  <!-- Copyright 1998-2014 by Northwoods Software Corporation. -->
  <script src="go.js"></script>
  <link href="../assets/css/goSamples.css" rel="stylesheet" type="text/css" />  <!-- you don't need to use this -->
  <script src="goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
  <script id="code">

    var red = "orangered";
    var green = "ForestGreen";

    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, "myDiagram",  // create a new Diagram in the HTML DIV element "myDiagram"
          {
            initialContentAlignment: go.Spot.Center,
            allowDrop: true,  // Nodes from the Palette can be dropped into the Diagram
            "draggingTool.isGridSnapEnabled": true,  // dragged nodes will snap to a grid of 10x10 cells
            "undoManager.isEnabled": true
          });

      // when the document is modified, add a "*" to the title and enable the "Save" button
      myDiagram.addDiagramListener("Modified", function(e) {
        var button = document.getElementById("saveModel");
        if (button) button.disabled = !myDiagram.isModified;
        var idx = document.title.indexOf("*");
        if (myDiagram.isModified) {
          if (idx < 0) document.title += "*";
        } else {
          if (idx >= 0) document.title = document.title.substr(0, idx);
        }
      });

      var palette = new go.Palette("palette");  // create a new Palette in the HTML DIV element "palette"

      // creates relinkable Links that will avoid crossing Nodes when possible and will jump over other Links in their paths
      myDiagram.linkTemplate =
        $(go.Link,
          { routing: go.Link.AvoidsNodes,
            curve: go.Link.JumpOver,
            corner: 3,
            relinkableFrom: true, relinkableTo: true,
            selectionAdorned: false, // Links are not adorned when selected so that their color remains visible.
            shadowOffset: new go.Point(0, 0), shadowBlur: 5, shadowColor: "blue",
          },
          new go.Binding("isShadowed", "isSelected").ofObject(),
          $(go.Shape,
            { name: "SHAPE", isPanelMain: true, strokeWidth: 2, stroke: red }));

      // node template helpers
      var sharedToolTip =
        $(go.Adornment, "Auto",
          $(go.Shape, "RoundedRectangle", { fill: "lightyellow" }),
          $(go.TextBlock, { margin: 2 },
            new go.Binding("text",  "" , function(d) { return d.category; })));

      // define some common property settings
      function nodeStyle() {
        return [new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
                new go.Binding("isShadowed", "isSelected").ofObject(),
                {
                  selectionAdorned: false,
                  shadowOffset: new go.Point(0, 0),
                  shadowBlur: 15,
                  shadowColor: "blue",
                  toolTip: sharedToolTip
                }];
      }

      function shapeStyle() {
        return {
          name: "NODESHAPE",
          fill: "lightgray",
          stroke: "darkslategray",
          desiredSize: new go.Size(40, 40),
          strokeWidth: 2
        };
      }

      function portStyle(input) {
        return {
          desiredSize: new go.Size(6, 6),
          fill: "black",
          fromSpot: go.Spot.Right,
          fromLinkable: !input,
          toSpot: go.Spot.Left,
          toLinkable: input,
          toMaxLinks: 1,
          cursor: "pointer"
        };
      }

      // define templates for each type of node
      var inputTemplate =
        $(go.Node, "Spot", nodeStyle(),
          $(go.Shape, "Circle", shapeStyle(),
            { fill: red }),  // override the default fill (from shapeStyle()) to be red
          $(go.Shape, "Rectangle", portStyle(false),  // the only port
            { portId: "", alignment: new go.Spot(1, 0.5) }),
          { // if double-clicked, an input node will change its value, represented by the color.
            doubleClick: function (e, obj) {
                e.diagram.startTransaction("Toggle Input");
                var shp = obj.findObject("NODESHAPE");
                shp.fill = (shp.fill === green) ? red : green;
                updateStates();
                e.diagram.commitTransaction("Toggle Input");
              }
          }
        );

      var outputTemplate =
        $(go.Node, "Spot", nodeStyle(),
          $(go.Shape, "Rectangle", shapeStyle(),
            { fill: green }),  // override the default fill (from shapeStyle()) to be green
          $(go.Shape, "Rectangle", portStyle(true),  // the only port
            { portId: "", alignment: new go.Spot(0, 0.5) })
        );

      var andTemplate =
        $(go.Node, "Spot", nodeStyle(),
          $(go.Shape, "AndGate", shapeStyle()),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in1", alignment: new go.Spot(0, 0.3) }),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in2", alignment: new go.Spot(0, 0.7) }),
          $(go.Shape, "Rectangle", portStyle(false),
            { portId: "out", alignment: new go.Spot(1, 0.5) })
        );

      var orTemplate =
        $(go.Node, "Spot", nodeStyle(),
          $(go.Shape, "OrGate", shapeStyle()),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in1", alignment: new go.Spot(0.16, 0.3) }),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in2", alignment: new go.Spot(0.16, 0.7) }),
          $(go.Shape, "Rectangle", portStyle(false),
            { portId: "out", alignment: new go.Spot(1, 0.5) })
        );

      var xorTemplate =
        $(go.Node, "Spot", nodeStyle(),
          $(go.Shape, "XorGate", shapeStyle()),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in1", alignment: new go.Spot(0.26, 0.3) }),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in2", alignment: new go.Spot(0.26, 0.7) }),
          $(go.Shape, "Rectangle", portStyle(false),
            { portId: "out", alignment: new go.Spot(1, 0.5) })
        );

      var norTemplate =
        $(go.Node, "Spot", nodeStyle(),
          $(go.Shape, "NorGate", shapeStyle()),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in1", alignment: new go.Spot(0.16, 0.3) }),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in2", alignment: new go.Spot(0.16, 0.7) }),
          $(go.Shape, "Rectangle", portStyle(false),
            { portId: "out", alignment: new go.Spot(1, 0.5) })
        );

      var xnorTemplate =
        $(go.Node, "Spot", nodeStyle(),
          $(go.Shape, "XnorGate", shapeStyle()),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in1", alignment: new go.Spot(0.26, 0.3) }),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in2", alignment: new go.Spot(0.26, 0.7) }),
          $(go.Shape, "Rectangle", portStyle(false),
            { portId: "out", alignment: new go.Spot(1, 0.5) })
        );

      var nandTemplate =
        $(go.Node, "Spot", nodeStyle(),
          $(go.Shape, "NandGate", shapeStyle()),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in1", alignment: new go.Spot(0, 0.3) }),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in2", alignment: new go.Spot(0, 0.7) }),
          $(go.Shape, "Rectangle", portStyle(false),
            { portId: "out", alignment: new go.Spot(1, 0.5) })
        );

      var notTemplate =
        $(go.Node, "Spot", nodeStyle(),
          $(go.Shape, "Inverter", shapeStyle()),
          $(go.Shape, "Rectangle", portStyle(true),
            { portId: "in", alignment: new go.Spot(0, 0.5) }),
          $(go.Shape, "Rectangle", portStyle(false),
            { portId: "out", alignment: new go.Spot(1, 0.5) })
        );

      // add the templates created above to myDiagram and palette
      myDiagram.nodeTemplateMap.add("input", inputTemplate);
      myDiagram.nodeTemplateMap.add("output", outputTemplate);
      myDiagram.nodeTemplateMap.add("and", andTemplate);
      myDiagram.nodeTemplateMap.add("or", orTemplate);
      myDiagram.nodeTemplateMap.add("xor", xorTemplate);
      myDiagram.nodeTemplateMap.add("not", notTemplate);
      myDiagram.nodeTemplateMap.add("nand", nandTemplate);
      myDiagram.nodeTemplateMap.add("nor", norTemplate);
      myDiagram.nodeTemplateMap.add("xnor", xnorTemplate);

      // share the template map with the Palette
      palette.nodeTemplateMap = myDiagram.nodeTemplateMap;

      palette.model.nodeDataArray = [
        { category: "input" },
        { category: "output" },
        { category: "and" },
        { category: "or" },
        { category: "xor" },
        { category: "not" },
        { category: "nand" },
        { category: "nor" },
        { category: "xnor" }
      ];

      // load the initial diagram
      load();

      // continually update the diagram
      loop();
    }

    // update the diagram every 250 milliseconds
    function loop() {
      setTimeout(function() { updateStates(); loop(); }, 250);
    }

    // update the value and appearance of each node according to its type and input values
    function updateStates() {
      var oldskip = myDiagram.skipsUndoManager;
      myDiagram.skipsUndoManager = true;
      // do all "input" nodes first
      myDiagram.nodes.each(function(node) {
          if (node.category === "input") {
            doInput(node);
          }
        });
      // now we can do all other kinds of nodes
      myDiagram.nodes.each(function(node) {
          switch (node.category) {
            case "and":       doAnd(node); break;
            case "or":         doOr(node); break;
            case "xor":       doXor(node); break;
            case "not":       doNot(node); break;
            case "nand":     doNand(node); break;
            case "nor":       doNor(node); break;
            case "xnor":     doXnor(node); break;
            case "output": doOutput(node); break;
            case "input": break;  // doInput already called, above
          }
        });
      myDiagram.skipsUndoManager = oldskip;
    }

    // helper predicate
    function linkIsTrue(link) {  // assume the given Link has a Shape named "SHAPE"
      return link.findObject("SHAPE").stroke === green;
    }

    // helper function for propagating results
    function setOutputLinks(node, color) {
      node.findLinksOutOf().each(function(link) { link.findObject("SHAPE").stroke = color; });
    }

    // update nodes by the specific function for its type
    // determine the color of links coming out of this node based on those coming in and node type

    function doInput(node) {
      // the output is just the node's Shape.fill
      setOutputLinks(node, node.findObject("NODESHAPE").fill);
    }

    function doAnd(node) {
      var color = node.findLinksInto().all(linkIsTrue) ? green : red;
      setOutputLinks(node, color);
    }
    function doNand(node) {
      var color = !node.findLinksInto().all(linkIsTrue) ? green : red;
      setOutputLinks(node, color);
    }
    function doNot(node) {
      var color = !node.findLinksInto().all(linkIsTrue) ? green : red;
      setOutputLinks(node, color);
    }

    function doOr(node) {
      var color = node.findLinksInto().any(linkIsTrue) ? green : red;
      setOutputLinks(node, color);
    }
    function doNor(node) {
      var color = !node.findLinksInto().any(linkIsTrue) ? green : red;
      setOutputLinks(node, color);
    }

    function doXor(node) {
      var truecount = 0;
      node.findLinksInto().each(function(link) { if (linkIsTrue(link)) truecount++; });
      var color = truecount % 2 === 0 ? green : red;
      setOutputLinks(node, color);
    }
    function doXnor(node) {
      var truecount = 0;
      node.findLinksInto().each(function(link) { if (linkIsTrue(link)) truecount++; });
      var color = truecount % 2 !== 0 ? green : red;
      setOutputLinks(node, color);
    }

    function doOutput(node) {
      // assume there is just one input link
      // we just need to update the node's Shape.fill
      node.linksConnected.each(function(link) { node.findObject("NODESHAPE").fill = link.findObject("SHAPE").stroke; });
    }

    // save a model to and load a model from Json text, displayed below the Diagram
    function save() {
      document.getElementById("mySavedModel").value = myDiagram.model.toJson();
      myDiagram.isModified = false;
    }
    function load() {
      myDiagram.model = go.Model.fromJson(document.getElementById("mySavedModel").value);
    }
  </script>
</head>
<body onload="init()">
<div id="sample">
  Logic Circuit emulator
  <div style="width:100%; white-space:nowrap;">
    <span style="display: inline-block; vertical-align: top; padding: 5px; width:100px">
      <div id="palette" style="background-color: Snow; border: solid 1px black; height: 500px"></div>
    </span>
    <span style="display: inline-block; vertical-align: top; padding: 5px; width:80%">
      <div id="myDiagram" style="border: solid 1px black; height: 500px"></div>
    </span>
  </div>
  <div id="description">
    The Logic Circuit sample allows the user to make circuits using gates and wires,
    which are updated whenever a Link is modified and at intervals by a looped setTimeout function.
    The <code>updateStates</code> function calls a function to update each node according to type,
    which uses the color of the links into the node to determine the color of those exiting it.
    Mouse over a node to see its category.
  </div>
  <div id="buttons">
    <button id="loadModel" onclick="load()">Load</button>
    <button id="saveModel" onclick="save()">Save</button>
  </div>
  <textarea id="mySavedModel" style="width:100%;height:200px">
{ "class": "go.GraphLinksModel",
  "linkFromPortIdProperty": "fromPort",
  "linkToPortIdProperty": "toPort",
  "nodeDataArray": [
{"category":"input", "key":"input1", "loc":"-150 -80" },
{"category":"or", "key":"or1", "loc":"-70 0" },
{"category":"not", "key":"not1", "loc":"10 0" },
{"category":"xor", "key":"xor1", "loc":"100 0" },
{"category":"or", "key":"or2", "loc":"200 0" },
{"category":"output", "key":"output1", "loc":"200 -100" }
 ],
  "linkDataArray": [
{"from":"input1", "fromPort":"out", "to":"or1", "toPort":"in1"},
{"from":"or1", "fromPort":"out", "to":"not1", "toPort":"in"},
{"from":"not1", "fromPort":"out", "to":"or1", "toPort":"in2"},
{"from":"not1", "fromPort":"out", "to":"xor1", "toPort":"in1"},
{"from":"xor1", "fromPort":"out", "to":"or2", "toPort":"in1"},
{"from":"or2", "fromPort":"out", "to":"xor1", "toPort":"in2"},
{"from":"xor1", "fromPort":"out", "to":"output1", "toPort":""}
 ]}
  </textarea>
</div>
</body>
</html>