"use strict";
/*
*  Copyright (C) 1998-2018 by Northwoods Software Corporation. All Rights Reserved.
*/

// This file holds all of the JavaScript code specific to the BPMN.html page.

// Setup all of the Diagrams and what they need.
// This is called after the page is loaded.
function init() {

    function checkLocalStorage() {
        try {
            window.localStorage.setItem('item', 'item');
            window.localStorage.removeItem('item');
            return true;
        } catch (e) {
            return false;
        }
    }

  if (!checkLocalStorage()) {
    var currentFile = document.getElementById("currentFile");
    currentFile.textContent = "Sorry! No web storage support. If you're using Internet Explorer / Microsoft Edge, you must load the page from a server for local storage to work.";
  }

// setup the menubar
jQuery( "#menuui" ).menu();
jQuery(function() {
        jQuery( "#menuui" ).menu({ position: { my: "left top", at: "left top+30" } });
        });
jQuery( "#menuui" ).menu({
  icons: { submenu: "ui-icon-triangle-1-s" }
});

  // hides open HTML Element
  var openDocument = document.getElementById("openDocument");
  openDocument.style.visibility = "hidden";
  // hides remove HTML Element
  var removeDocument = document.getElementById("removeDocument");
  removeDocument.style.visibility = "hidden";


  var $ = go.GraphObject.make;  // for more concise visual tree definitions

  // constants for design choices

  var GradientYellow = $(go.Brush, "Linear", { 0: "LightGoldenRodYellow", 1: "#FFFF66" });
  var GradientLightGreen = $(go.Brush, "Linear", { 0: "#E0FEE0", 1: "PaleGreen" });
  var GradientLightGray = $(go.Brush, "Linear", { 0: "White", 1: "#DADADA" });

  var ActivityNodeFill = $(go.Brush, "Linear", { 0: "OldLace", 1: "PapayaWhip" });
  var ActivityNodeStroke = "#CDAA7D";
  var ActivityMarkerStrokeWidth = 1.5;
  var ActivityNodeWidth = 120;
  var ActivityNodeHeight = 80;
  var ActivityNodeStrokeWidth = 1;
  var ActivityNodeStrokeWidthIsCall = 4;

  var SubprocessNodeFill = ActivityNodeFill;
  var SubprocessNodeStroke = ActivityNodeStroke;

  var EventNodeSize = 42;
  var EventNodeInnerSize = EventNodeSize - 6;
  var EventNodeSymbolSize = EventNodeInnerSize - 14;
  var EventEndOuterFillColor = "pink";
  var EventBackgroundColor = GradientLightGreen;
  var EventSymbolLightFill = "white";
  var EventSymbolDarkFill = "dimgray";
  var EventDimensionStrokeColor = "green";
  var EventDimensionStrokeEndColor = "red";
  var EventNodeStrokeWidthIsEnd = 4;

  var GatewayNodeSize = 80;
  var GatewayNodeSymbolSize = 45;
  var GatewayNodeFill = GradientYellow;
  var GatewayNodeStroke = "darkgoldenrod";
  var GatewayNodeSymbolStroke = "darkgoldenrod";
  var GatewayNodeSymbolFill = GradientYellow;
  var GatewayNodeSymbolStrokeWidth = 3;

  var DataFill = GradientLightGray;


  // custom figures for Shapes

  go.Shape.defineFigureGenerator("Empty", function(shape, w, h) {
    return new go.Geometry();
  });

  var annotationStr = "M 150,0L 0,0L 0,600L 150,600 M 800,0";
  var annotationGeo = go.Geometry.parse(annotationStr);
  annotationGeo.normalize();
  go.Shape.defineFigureGenerator("Annotation", function(shape, w, h) {
    var geo = annotationGeo.copy();
    // calculate how much to scale the Geometry so that it fits in w x h
    var bounds = geo.bounds;
    var scale = Math.min(w / bounds.width, h / bounds.height);
    geo.scale(scale, scale);
    return geo;
  });

  var gearStr = "F M 391,5L 419,14L 444.5,30.5L 451,120.5L 485.5,126L 522,141L 595,83L 618.5,92L 644,106.5" +
    "L 660.5,132L 670,158L 616,220L 640.5,265.5L 658.122,317.809L 753.122,322.809L 770.122,348.309L 774.622,374.309" +
    "L 769.5,402L 756.622,420.309L 659.122,428.809L 640.5,475L 616.5,519.5L 670,573.5L 663,600L 646,626.5" +
    "L 622,639L 595,645.5L 531.5,597.5L 493.192,613.462L 450,627.5L 444.5,718.5L 421.5,733L 393,740.5L 361.5,733.5" +
    "L 336.5,719L 330,627.5L 277.5,611.5L 227.5,584.167L 156.5,646L 124.5,641L 102,626.5L 82,602.5L 78.5,572.5" +
    "L 148.167,500.833L 133.5,466.833L 122,432.5L 26.5,421L 11,400.5L 5,373.5L 12,347.5L 26.5,324L 123.5,317.5" +
    "L 136.833,274.167L 154,241L 75.5,152.5L 85.5,128.5L 103,105.5L 128.5,88.5001L 154.872,82.4758L 237,155" +
    "L 280.5,132L 330,121L 336,30L 361,15L 391,5 Z M 398.201,232L 510.201,275L 556.201,385L 505.201,491L 399.201,537" +
    "L 284.201,489L 242.201,385L 282.201,273L 398.201,232 Z";
  var gearGeo = go.Geometry.parse(gearStr);
  gearGeo.normalize();

  go.Shape.defineFigureGenerator("BpmnTaskService", function(shape, w, h) {
    var geo = gearGeo.copy();
    // calculate how much to scale the Geometry so that it fits in w x h
    var bounds = geo.bounds;
    var scale = Math.min(w / bounds.width, h / bounds.height);
    geo.scale(scale, scale);
    // text should go in the hand
    geo.spot1 = new go.Spot(0, 0.6, 10, 0);
    geo.spot2 = new go.Spot(1, 1);
    return geo;
  });

  var handGeo = go.Geometry.parse("F1M18.13,10.06 C18.18,10.07 18.22,10.07 18.26,10.08 18.91," +
    "10.20 21.20,10.12 21.28,12.93 21.36,15.75 21.42,32.40 21.42,32.40 21.42," +
    "32.40 21.12,34.10 23.08,33.06 23.08,33.06 22.89,24.76 23.80,24.17 24.72," +
    "23.59 26.69,23.81 27.19,24.40 27.69,24.98 28.03,24.97 28.03,33.34 28.03," +
    "33.34 29.32,34.54 29.93,33.12 30.47,31.84 29.71,27.11 30.86,26.56 31.80," +
    "26.12 34.53,26.12 34.72,28.29 34.94,30.82 34.22,36.12 35.64,35.79 35.64," +
    "35.79 36.64,36.08 36.72,34.54 36.80,33.00 37.17,30.15 38.42,29.90 39.67," +
    "29.65 41.22,30.20 41.30,32.29 41.39,34.37 42.30,46.69 38.86,55.40 35.75," +
    "63.29 36.42,62.62 33.47,63.12 30.76,63.58 26.69,63.12 26.69,63.12 26.69," +
    "63.12 17.72,64.45 15.64,57.62 13.55,50.79 10.80,40.95 7.30,38.95 3.80," +
    "36.95 4.24,36.37 4.28,35.35 4.32,34.33 7.60,31.25 12.97,35.75 12.97," +
    "35.75 16.10,39.79 16.10,42.00 16.10,42.00 15.69,14.30 15.80,12.79 15.96," +
    "10.75 17.42,10.04 18.13,10.06z ");
  handGeo.rotate(90, 0, 0);
  handGeo.normalize();
  go.Shape.defineFigureGenerator("BpmnTaskManual", function(shape, w, h) {
    var geo = handGeo.copy();
    // calculate how much to scale the Geometry so that it fits in w x h
    var bounds = geo.bounds;
    var scale = Math.min(w / bounds.width, h / bounds.height);
    geo.scale(scale, scale);
    // guess where text should go (in the hand)
    geo.spot1 = new go.Spot(0, 0.6, 10, 0);
    geo.spot2 = new go.Spot(1, 1);
    return geo;
  });


  // define the appearance of tooltips, shared by various templates
  var tooltiptemplate =
    $(go.Adornment, go.Panel.Auto,
      $(go.Shape, "RoundedRectangle",
        { fill: "whitesmoke", stroke: "gray" }),
      $(go.TextBlock,
        { margin: 3, editable: true },
        new go.Binding("text", "", function (data) {
          if (data.item !== undefined) return data.item;
          return "(unnamed item)";
        }))
    );


  // conversion functions used by data Bindings

  function nodeActivityTaskTypeConverter(s) {
    var tasks = ["Empty",
                  "BpmnTaskMessage",
                  "BpmnTaskUser",
                  "BpmnTaskManual",   // Custom hand symbol
                  "BpmnTaskScript",
                  "BpmnTaskMessage",  // should be black on white
                  "BpmnTaskService",  // Custom gear symbol
                  "InternalStorage"];
    if (s < tasks.length) return tasks[s];
    return "NotAllowed"; // error
  }

  // location of event on boundary of Activity is based on the index of the event in the boundaryEventArray
  function nodeActivityBESpotConverter(s) {
    var x = 10 + (EventNodeSize / 2);
    if (s === 0) return new go.Spot(0, 1, x, 0);    // bottom left
    if (s === 1) return new go.Spot(1, 1, -x, 0);   // bottom right
    if (s === 2) return new go.Spot(1, 0, -x, 0);   // top right
    return new go.Spot(1, 0, -x - (s - 2) * EventNodeSize, 0);    // top ... right-to-left-ish spread
  }

  function nodeActivityTaskTypeColorConverter(s) {
    return (s == 5) ? "dimgray" : "white";
  }

  function nodeEventTypeConverter(s) {  // order here from BPMN 2.0 poster
    var tasks = [ "NotAllowed",
                  "Empty",
                  "BpmnTaskMessage",
                  "BpmnEventTimer",
                  "BpmnEventEscalation",
                  "BpmnEventConditional",
                  "Arrow",
                  "BpmnEventError",
                  "ThinX",
                  "BpmnActivityCompensation",
                  "Triangle",
                  "Pentagon",
                  "ThickCross",
                  "Circle"];
    if (s < tasks.length) return tasks[s];
    return "NotAllowed"; // error
  }

  function nodeEventDimensionStrokeColorConverter(s) {
    if (s === 8) return EventDimensionStrokeEndColor;
    return EventDimensionStrokeColor;
  }

  function nodeEventDimensionSymbolFillConverter(s) {
    if (s <= 6) return EventSymbolLightFill;
    return EventSymbolDarkFill;
  }


  //------------------------------------------  Activity Node Boundary Events   ----------------------------------------------

  var boundaryEventMenu =  // context menu for each boundaryEvent on Activity node
  $(go.Adornment, "Vertical",
    $("ContextMenuButton",
      $(go.TextBlock, "Remove event"),
      // in the click event handler, the obj.part is the Adornment; its adornedObject is the port
      { click: function(e, obj) { removeActivityNodeBoundaryEvent(obj.part.adornedObject); } })
   );

  // removing a boundary event doesn't not reposition other BE circles on the node
  // just reassigning alignmentIndex in remaining BE would do that.
  function removeActivityNodeBoundaryEvent(obj) {
    myDiagram.startTransaction("removeBoundaryEvent");
    var pid = obj.portId;
    var arr = obj.panel.itemArray;
    for (var i = 0; i < arr.length; i++) {
      if (arr[i].portId === pid) {
        myDiagram.model.removeArrayItem(arr, i);
        break;
      }
    }
    myDiagram.commitTransaction("removeBoundaryEvent");
  }

  var boundaryEventItemTemplate =
    $(go.Panel, "Spot",
       { contextMenu: boundaryEventMenu,
         alignmentFocus: go.Spot.Center,
         fromLinkable: true, toLinkable: false, cursor: "pointer", fromSpot: go.Spot.Bottom,
         fromMaxLinks: 1, toMaxLinks: 0
       },
       new go.Binding("portId", "portId"),
       new go.Binding("alignment", "alignmentIndex", nodeActivityBESpotConverter),
      $(go.Shape, "Circle",
        { desiredSize: new go.Size(EventNodeSize, EventNodeSize) },
        new go.Binding("strokeDashArray", "eventDimension", function(s) { return (s === 6) ? [4, 2] : null; }),
        new go.Binding("fromSpot", "alignmentIndex",
          function(s) {
            //  nodeActivityBEFromSpotConverter, 0 & 1 go on bottom, all others on top of activity
            if (s < 2) return go.Spot.Bottom;
            return go.Spot.Top;
          }),
        new go.Binding("fill", "color")),
      $(go.Shape, "Circle",
         { alignment: go.Spot.Center,
           desiredSize: new go.Size(EventNodeInnerSize, EventNodeInnerSize), fill: null },
         new go.Binding("strokeDashArray", "eventDimension", function(s) { return (s === 6) ? [4, 2] : null; })
       ),
      $(go.Shape, "NotAllowed",
          { alignment: go.Spot.Center,
            desiredSize: new go.Size(EventNodeSymbolSize, EventNodeSymbolSize), fill: "white" },
            new go.Binding("figure", "eventType", nodeEventTypeConverter)
        )
    );

  //------------------------------------------  Activity Node contextMenu   ----------------------------------------------

  var activityNodeMenu =
       $(go.Adornment, "Vertical",
         $("ContextMenuButton",
             $(go.TextBlock, "Add Email Event", { margin: 3 }),
             { click: function(e, obj) { addActivityNodeBoundaryEvent(2, 5); } }),
         $("ContextMenuButton",
             $(go.TextBlock, "Add Timer Event", { margin: 3 }),
             { click: function(e, obj) { addActivityNodeBoundaryEvent(3, 5); } }),
         $("ContextMenuButton",
             $(go.TextBlock, "Add Escalation Event", { margin: 3 }),
             { click: function(e, obj) { addActivityNodeBoundaryEvent(4, 5); } }),
         $("ContextMenuButton",
             $(go.TextBlock, "Add Error Event", { margin: 3 }),
             { click: function(e, obj) { addActivityNodeBoundaryEvent(7, 5); } }),
         $("ContextMenuButton",
             $(go.TextBlock, "Add Signal Event", { margin: 3 }),
             { click: function(e, obj) { addActivityNodeBoundaryEvent(10, 5); } }),
         $("ContextMenuButton",
             $(go.TextBlock, "Add N-I Escalation Event", { margin: 3 }),
             { click: function(e, obj) { addActivityNodeBoundaryEvent(4, 6); } }),
         $("ContextMenuButton",
             $(go.TextBlock, "Rename", { margin: 3 }),
             { click: function(e, obj) { rename(obj); } }));


  // sub-process,  loop, parallel, sequential, ad doc and compensation markers in horizontal array
  function makeSubButton(sub) {
    if (sub)
      return [$("SubGraphExpanderButton"),
              { margin: 2, visible: false },
                   new go.Binding("visible", "isSubProcess")];
    return [];
  }

  // sub-process,  loop, parallel, sequential, ad doc and compensation markers in horizontal array
  function makeMarkerPanel(sub, scale) {
    return $(go.Panel, "Horizontal",
            { alignment: go.Spot.MiddleBottom, alignmentFocus: go.Spot.MiddleBottom },
            $(go.Shape, "BpmnActivityLoop",
              { width: 12 / scale, height: 12 / scale, margin: 2, visible: false, strokeWidth: ActivityMarkerStrokeWidth },
              new go.Binding("visible", "isLoop")),
            $(go.Shape, "BpmnActivityParallel",
              { width: 12 / scale, height: 12 / scale, margin: 2, visible: false, strokeWidth: ActivityMarkerStrokeWidth },
              new go.Binding("visible", "isParallel")),
            $(go.Shape, "BpmnActivitySequential",
              { width: 12 / scale, height: 12 / scale, margin: 2, visible: false, strokeWidth: ActivityMarkerStrokeWidth },
              new go.Binding("visible", "isSequential")),
            $(go.Shape, "BpmnActivityAdHoc",
              { width: 12 / scale, height: 12 / scale, margin: 2, visible: false, strokeWidth: ActivityMarkerStrokeWidth },
              new go.Binding("visible", "isAdHoc")),
            $(go.Shape, "BpmnActivityCompensation",
              { width: 12 / scale, height: 12 / scale, margin: 2, visible: false, strokeWidth: ActivityMarkerStrokeWidth, fill: null },
              new go.Binding("visible", "isCompensation")),
            makeSubButton(sub)
          ); // end activity markers horizontal panel
  }

  var activityNodeTemplate =
  $(go.Node, "Spot",
     { locationObjectName: "SHAPE", locationSpot: go.Spot.Center,
       resizable: true, resizeObjectName: "PANEL",
       toolTip: tooltiptemplate,
       selectionAdorned: false,  // use a Binding on the Shape.stroke to show selection
       contextMenu: activityNodeMenu,
       itemTemplate: boundaryEventItemTemplate
     },
     new go.Binding("itemArray", "boundaryEventArray"),
     new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
     // move a selected part into the Foreground layer, so it isn"t obscured by any non-selected parts
     new go.Binding("layerName", "isSelected", function(s) { return s ? "Foreground" : ""; }).ofObject(),
    $(go.Panel, "Auto",
      { name: "PANEL",
          minSize: new go.Size(ActivityNodeWidth, ActivityNodeHeight),
          desiredSize: new go.Size(ActivityNodeWidth, ActivityNodeHeight)
      },
      new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify),
       $(go.Panel, "Spot",
        $(go.Shape, "RoundedRectangle",  // the outside rounded rectangle
          { name: "SHAPE",
              fill: ActivityNodeFill, stroke: ActivityNodeStroke,
            parameter1: 10, // corner size
            portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer",
            fromSpot: go.Spot.RightSide, toSpot: go.Spot.LeftSide
          },
          new go.Binding("fill", "color"),
          new go.Binding("strokeWidth", "isCall",
               function(s) { return s ? ActivityNodeStrokeWidthIsCall : ActivityNodeStrokeWidth; })
         ),
//        $(go.Shape, "RoundedRectangle",  // the inner "Transaction" rounded rectangle
//          { margin: 3,
//            stretch: go.GraphObject.Fill,
  //            stroke: ActivityNodeStroke,
//            parameter1: 8, fill: null, visible: false
//          },
//          new go.Binding("visible", "isTransaction")
//         ),
        // task icon
        $(go.Shape, "BpmnTaskScript",    // will be None, Script, Manual, Service, etc via converter
          { alignment: new go.Spot(0, 0, 5, 5), alignmentFocus: go.Spot.TopLeft,
            width: 22, height: 22
          },
          new go.Binding("fill", "taskType", nodeActivityTaskTypeColorConverter),
          new go.Binding("figure", "taskType", nodeActivityTaskTypeConverter)
          ), // end Task Icon
        makeMarkerPanel(false, 1) // sub-process,  loop, parallel, sequential, ad doc and compensation markers
        ),  // end main body rectangles spot panel
      $(go.TextBlock,  // the center text
        { alignment: go.Spot.Center, textAlign: "center", margin: 12,
          editable: true
        },
        new go.Binding("text").makeTwoWay())
      )  // end Auto Panel
    );  // end go.Node, which is a Spot Panel with bound itemArray

  // ------------------------------- template for Activity / Task node in Palette  -------------------------------

  var palscale = 2;
  var activityNodeTemplateForPalette =
  $(go.Node, "Vertical",
     { locationObjectName: "SHAPE",
       locationSpot: go.Spot.Center,
       selectionAdorned: false
     },
    new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
    $(go.Panel, "Spot",
      { name: "PANEL",
          desiredSize: new go.Size(ActivityNodeWidth / palscale, ActivityNodeHeight / palscale)
      },
      $(go.Shape, "RoundedRectangle",  // the outside rounded rectangle
        { name: "SHAPE",
            fill: ActivityNodeFill, stroke: ActivityNodeStroke,
          parameter1: 10 / palscale  // corner size (default 10)
        },
        new go.Binding("strokeWidth", "isCall",
            function(s) { return s ? ActivityNodeStrokeWidthIsCall : ActivityNodeStrokeWidth; })),
      $(go.Shape, "RoundedRectangle",  // the inner "Transaction" rounded rectangle
        { margin: 3,
          stretch: go.GraphObject.Fill,
            stroke: ActivityNodeStroke,
          parameter1: 8 / palscale, fill: null, visible: false
        },
        new go.Binding("visible", "isTransaction")),
      // task icon
      $(go.Shape, "BpmnTaskScript",    // will be None, Script, Manual, Service, etc via converter
        { alignment: new go.Spot(0, 0, 5, 5), alignmentFocus: go.Spot.TopLeft,
          width: 22 / palscale, height: 22 / palscale
        },
        new go.Binding("fill", "taskType", nodeActivityTaskTypeColorConverter),
        new go.Binding("figure", "taskType", nodeActivityTaskTypeConverter)),
      makeMarkerPanel(false, palscale) // sub-process,  loop, parallel, sequential, ad doc and compensation markers
    ), // End Spot panel
    $(go.TextBlock,  // the center text
        { alignment: go.Spot.Center, textAlign: "center", margin: 2 },
        new go.Binding("text"))
    );  // End Node

  var subProcessGroupTemplateForPalette =
  $(go.Group, "Vertical",
     { locationObjectName: "SHAPE",
       locationSpot: go.Spot.Center,
       isSubGraphExpanded: false,
       selectionAdorned: false
     },
    $(go.Panel, "Spot",
      { name: "PANEL",
          desiredSize: new go.Size(ActivityNodeWidth / palscale, ActivityNodeHeight / palscale)
      },
      $(go.Shape, "RoundedRectangle",  // the outside rounded rectangle
            { name: "SHAPE",
                fill: ActivityNodeFill, stroke: ActivityNodeStroke,
              parameter1: 10 / palscale  // corner size (default 10)
            },
              new go.Binding("strokeWidth", "isCall", function(s) { return s ? ActivityNodeStrokeWidthIsCall : ActivityNodeStrokeWidth; })
          ),
      $(go.Shape, "RoundedRectangle",  // the inner "Transaction" rounded rectangle
        { margin: 3,
          stretch: go.GraphObject.Fill,
            stroke: ActivityNodeStroke,
          parameter1: 8 / palscale, fill: null, visible: false
        },
        new go.Binding("visible", "isTransaction")),
        makeMarkerPanel(true, palscale) // sub-process,  loop, parallel, sequential, ad doc and compensation markers
      ), // end main body rectangles spot panel
      $(go.TextBlock,  // the center text
        { alignment: go.Spot.Center, textAlign: "center", margin: 2 },
        new go.Binding("text"))
    );  // end go.Group

  //------------------------------------------  Event Node Template  ----------------------------------------------

  var eventNodeTemplate =
    $(go.Node, "Vertical",
      { locationObjectName: "SHAPE",
        locationSpot: go.Spot.Center,
        toolTip: tooltiptemplate
      },
      new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
      // move a selected part into the Foreground layer, so it isn't obscured by any non-selected parts
      new go.Binding("layerName", "isSelected", function(s) { return s ? "Foreground" : ""; }).ofObject(),
      // can be resided according to the user's desires
      { resizable: false, resizeObjectName: "SHAPE" },
        $(go.Panel, "Spot",
          $(go.Shape, "Circle",  // Outer circle
            { strokeWidth: 1,
              name: "SHAPE",
              desiredSize: new go.Size(EventNodeSize, EventNodeSize),
              portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer",
              fromSpot: go.Spot.RightSide, toSpot: go.Spot.LeftSide
            },
            // allows the color to be determined by the node data
            new go.Binding("fill", "eventDimension", function(s) { return (s === 8) ? EventEndOuterFillColor : EventBackgroundColor; }),
            new go.Binding("strokeWidth", "eventDimension", function(s) { return s === 8 ? EventNodeStrokeWidthIsEnd : 1; }),
            new go.Binding("stroke", "eventDimension", nodeEventDimensionStrokeColorConverter),
            new go.Binding("strokeDashArray", "eventDimension", function(s) { return (s === 3 || s === 6) ? [4, 2] : null; }),
            new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify)
          ),  // end main shape
          $(go.Shape, "Circle",  // Inner circle
              { alignment: go.Spot.Center, desiredSize: new go.Size(EventNodeInnerSize, EventNodeInnerSize), fill: null },
              new go.Binding("stroke", "eventDimension", nodeEventDimensionStrokeColorConverter),
              new go.Binding("strokeDashArray", "eventDimension", function(s) { return (s === 3 || s === 6) ? [4, 2] : null; }), // dashes for non-interrupting
              new go.Binding("visible", "eventDimension", function(s) { return s > 3 && s <= 7; }) // inner  only visible for 4 thru 7
            ),
$(go.Shape, "NotAllowed",
              { alignment: go.Spot.Center, desiredSize: new go.Size(EventNodeSymbolSize, EventNodeSymbolSize), stroke: "black" },
                new go.Binding("figure", "eventType", nodeEventTypeConverter),
                new go.Binding("fill", "eventDimension", nodeEventDimensionSymbolFillConverter)
            )
        ),  // end Auto Panel
        $(go.TextBlock,
          { alignment: go.Spot.Center, textAlign: "center", margin: 5, editable: true },
          new go.Binding("text").makeTwoWay())

      ); // end go.Node Vertical

  //------------------------------------------  Gateway Node Template   ----------------------------------------------

  function nodeGatewaySymbolTypeConverter(s) {
    var tasks =  ["NotAllowed",
                  "ThinCross",      // 1 - Parallel
                  "Circle",         // 2 - Inclusive
                  "AsteriskLine",   // 3 - Complex
                  "ThinX",          // 4 - Exclusive  (exclusive can also be no symbol, just bind to visible=false for no symbol)
                  "Pentagon",       // 5 - double cicle event based gateway
                  "Pentagon",       // 6 - exclusive event gateway to start a process (single circle)
                  "ThickCross"]     // 7 - parallel event gateway to start a process (single circle)
    if (s < tasks.length) return tasks[s];
    return "NotAllowed"; // error
  }

  // tweak the size of some of the gateway icons
  function nodeGatewaySymbolSizeConverter(s) {
    var size = new go.Size(GatewayNodeSymbolSize, GatewayNodeSymbolSize);
    if (s === 4) {
      size.width = size.width / 4 * 3;
      size.height = size.height / 4 * 3;
    }
    else if (s > 4) {
      size.width = size.width / 1.6;
      size.height = size.height / 1.6;
    }
    return size;
  }
  function nodePalGatewaySymbolSizeConverter(s) {
    var size = nodeGatewaySymbolSizeConverter(s);
    size.width = size.width / 2;
    size.height = size.height / 2;
    return size;
  }

  var gatewayNodeTemplate =
    $(go.Node, "Vertical",
      { locationObjectName: "SHAPE",
        locationSpot: go.Spot.Center,
        toolTip: tooltiptemplate
      },
      new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
      // move a selected part into the Foreground layer, so it isn't obscured by any non-selected parts
      new go.Binding("layerName", "isSelected", function(s) { return s ? "Foreground" : ""; }).ofObject(),
      // can be resided according to the user's desires
      { resizable: false, resizeObjectName: "SHAPE" },
        $(go.Panel, "Spot",
          $(go.Shape, "Diamond",
            { strokeWidth: 1, fill: GatewayNodeFill, stroke: GatewayNodeStroke,
              name: "SHAPE",
              desiredSize: new go.Size(GatewayNodeSize, GatewayNodeSize),
              portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer",
              fromSpot: go.Spot.NotLeftSide, toSpot: go.Spot.MiddleLeft
            },
            new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify)),  // end main shape
          $(go.Shape, "NotAllowed",
              { alignment: go.Spot.Center, stroke: GatewayNodeSymbolStroke, fill: GatewayNodeSymbolFill },
                new go.Binding("figure", "gatewayType", nodeGatewaySymbolTypeConverter),
                //new go.Binding("visible", "gatewayType", function(s) { return s !== 4; }),   // comment out if you want exclusive gateway to be X instead of blank.
                new go.Binding("strokeWidth", "gatewayType", function(s) { return (s <=4 ) ? GatewayNodeSymbolStrokeWidth : 1; }),
                new go.Binding("desiredSize", "gatewayType", nodeGatewaySymbolSizeConverter)),
          // the next 2 circles only show up for event gateway
          $(go.Shape, "Circle",  // Outer circle
            { strokeWidth: 1, stroke: GatewayNodeSymbolStroke, fill: null, desiredSize: new go.Size(EventNodeSize, EventNodeSize)
            },
            new go.Binding("visible", "gatewayType", function(s) { return s >= 5; }) // only visible for > 5
          ),  // end main shape
          $(go.Shape, "Circle",  // Inner circle
              { alignment: go.Spot.Center, stroke: GatewayNodeSymbolStroke,
                desiredSize: new go.Size(EventNodeInnerSize, EventNodeInnerSize),
                fill: null },
              new go.Binding("visible", "gatewayType", function(s) { return s === 5; }) // inner  only visible for == 5
            )
         ),
        $(go.TextBlock,
          { alignment: go.Spot.Center, textAlign: "center", margin: 5, editable: true },
          new go.Binding("text").makeTwoWay())
      ); // end go.Node Vertical

  //--------------------------------------------------------------------------------------------------------------

  var gatewayNodeTemplateForPalette =
    $(go.Node, "Vertical",
      { toolTip: tooltiptemplate,
        resizable: false,
        locationObjectName: "SHAPE",
        locationSpot: go.Spot.Center,
        resizeObjectName: "SHAPE" },
      new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
      $(go.Panel, "Spot",
        $(go.Shape, "Diamond",
          { strokeWidth: 1, fill: GatewayNodeFill, stroke: GatewayNodeStroke, name: "SHAPE",
            desiredSize: new go.Size(GatewayNodeSize / 2, GatewayNodeSize / 2)
          }),
        $(go.Shape, "NotAllowed",
            { alignment: go.Spot.Center, stroke: GatewayNodeSymbolStroke, strokeWidth: GatewayNodeSymbolStrokeWidth, fill: GatewayNodeSymbolFill },
              new go.Binding("figure", "gatewayType", nodeGatewaySymbolTypeConverter),
              //new go.Binding("visible", "gatewayType", function(s) { return s !== 4; }),   // comment out if you want exclusive gateway to be X instead of blank.
              new go.Binding("strokeWidth", "gatewayType", function(s) { return (s <=4 ) ? GatewayNodeSymbolStrokeWidth : 1; }),
              new go.Binding("desiredSize", "gatewayType", nodePalGatewaySymbolSizeConverter)),
          // the next 2 circles only show up for event gateway
          $(go.Shape, "Circle",  // Outer circle
            { strokeWidth: 1, stroke: GatewayNodeSymbolStroke, fill: null, desiredSize: new go.Size(EventNodeSize/2, EventNodeSize/2)
            },
            //new go.Binding("desiredSize", "gatewayType", new go.Size(EventNodeSize/2, EventNodeSize/2)),
            new go.Binding("visible", "gatewayType", function(s) { return s >= 5; }) // only visible for > 5
          ),  // end main shape
          $(go.Shape, "Circle",  // Inner circle
              { alignment: go.Spot.Center, stroke: GatewayNodeSymbolStroke,
                desiredSize: new go.Size(EventNodeInnerSize/2, EventNodeInnerSize/2),
                fill: null },
              new go.Binding("visible", "gatewayType", function(s) { return s === 5; }) // inner  only visible for == 5
            )),

      $(go.TextBlock,
        { alignment: go.Spot.Center, textAlign: "center", margin: 5, editable: false },
        new go.Binding("text"))
    );

  //--------------------------------------------------------------------------------------------------------------

  var annotationNodeTemplate =
    $(go.Node, "Auto",
      { background: GradientLightGray, locationSpot: go.Spot.Center },
      new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
      $(go.Shape, "Annotation", // A left bracket shape
        { portId: "", fromLinkable: true, cursor: "pointer", fromSpot: go.Spot.Left, strokeWidth: 2, stroke: "gray" }),
      $(go.TextBlock,
        { margin: 5, editable: true },
        new go.Binding("text").makeTwoWay())
    );

  var dataObjectNodeTemplate =
    $(go.Node, "Vertical",
      { locationObjectName: "SHAPE", locationSpot: go.Spot.Center },
      new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
      $(go.Shape, "File",
        { name: "SHAPE", portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer",
          fill: DataFill, desiredSize: new go.Size(EventNodeSize * 0.8, EventNodeSize)}),
      $(go.TextBlock,
        { margin: 5,
          editable: true },
          new go.Binding("text").makeTwoWay())
    );

  var dataStoreNodeTemplate =
    $(go.Node, "Vertical",
      { locationObjectName: "SHAPE", locationSpot: go.Spot.Center },
      new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
      $(go.Shape, "Database",
        { name: "SHAPE", portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer",
          fill: DataFill, desiredSize: new go.Size(EventNodeSize, EventNodeSize) }),
      $(go.TextBlock,
        { margin: 5, editable: true },
        new go.Binding("text").makeTwoWay())
    );

  //------------------------------------------  private process Node Template Map   ----------------------------------------------

  var privateProcessNodeTemplate =
    $(go.Node, "Auto",
      { layerName: "Background", resizable: true, resizeObjectName: "LANE" },
      new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
      $(go.Shape, "Rectangle",
        { fill: null }),
      $(go.Panel, "Table",     // table with 2 cells to hold header and lane
        { desiredSize: new go.Size(ActivityNodeWidth * 6, ActivityNodeHeight),
          background: DataFill, name: "LANE", minSize: new go.Size(ActivityNodeWidth, ActivityNodeHeight * 0.667)
        },
        new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify),
        $(go.TextBlock,
          { row: 0, column: 0,
            angle: 270, margin: 5,
            editable: true, textAlign: "center"
          },
          new go.Binding("text").makeTwoWay()),
        $(go.RowColumnDefinition, { column: 1, separatorStrokeWidth: 1, separatorStroke: "black" }),
        $(go.Shape, "Rectangle",
          { row: 0, column: 1,
            stroke: null, fill: "transparent",
            portId: "", fromLinkable: true, toLinkable: true,
            fromSpot: go.Spot.TopBottomSides, toSpot: go.Spot.TopBottomSides,
            cursor: "pointer", stretch: go.GraphObject.Fill })
       )
    );

  var privateProcessNodeTemplateForPalette =
    $(go.Node, "Vertical",
      { locationSpot: go.Spot.Center },
      $(go.Shape, "Process",
        { fill: DataFill, desiredSize: new go.Size(GatewayNodeSize / 2, GatewayNodeSize / 4) }),
      $(go.TextBlock,
        { margin: 5, editable: true },
        new go.Binding("text"))
    );

  var poolTemplateForPalette =
    $(go.Group, "Vertical",
      { locationSpot: go.Spot.Center,
        computesBoundsIncludingLinks: false,
        isSubGraphExpanded: false
      },
      $(go.Shape, "Process",
        { fill: "white", desiredSize: new go.Size(GatewayNodeSize / 2, GatewayNodeSize / 4) }),
      $(go.Shape, "Process",
        { fill: "white", desiredSize: new go.Size(GatewayNodeSize / 2, GatewayNodeSize / 4) }),
      $(go.TextBlock,
        { margin: 5, editable: true },
        new go.Binding("text"))
    );

  var swimLanesGroupTemplateForPalette =
    $(go.Group, "Vertical" ); // empty in the palette

  var subProcessGroupTemplate =
    $(go.Group, "Spot",
      { locationSpot: go.Spot.Center,
        locationObjectName: "PH",
        //locationSpot: go.Spot.Center,
        isSubGraphExpanded: false,
        memberValidation: function(group, part) {
          return !(part instanceof go.Group) ||
                 (part.category !== "Pool" && part.category !== "Lane");
        },
        mouseDrop: function(e, grp) {
          var ok = grp.addMembers(grp.diagram.selection, true);
          if (!ok) grp.diagram.currentTool.doCancel();
        },
        contextMenu: activityNodeMenu,
        itemTemplate: boundaryEventItemTemplate
      },
      new go.Binding("itemArray", "boundaryEventArray"),
      new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
      // move a selected part into the Foreground layer, so it isn't obscured by any non-selected parts
      // new go.Binding("layerName", "isSelected", function (s) { return s ? "Foreground" : ""; }).ofObject(),
      $(go.Panel, "Auto",
        $(go.Shape, "RoundedRectangle",
            {
              name: "PH", fill: SubprocessNodeFill, stroke: SubprocessNodeStroke,
              minSize: new go.Size(ActivityNodeWidth, ActivityNodeHeight),
              portId: "", fromLinkable: true, toLinkable: true, cursor: "pointer",
              fromSpot: go.Spot.RightSide, toSpot: go.Spot.LeftSide
            },
            new go.Binding("strokeWidth", "isCall", function(s) { return s ? ActivityNodeStrokeWidthIsCall : ActivityNodeStrokeWidth; })
           ),
          $(go.Panel, "Vertical",
            { defaultAlignment: go.Spot.Left },
            $(go.TextBlock,  // label
              { margin: 3, editable: true },
              new go.Binding("text", "text").makeTwoWay(),
              new go.Binding("alignment", "isSubGraphExpanded", function(s) { return s ? go.Spot.TopLeft : go.Spot.Center; })),
            // create a placeholder to represent the area where the contents of the group are
            $(go.Placeholder,
              { padding: new go.Margin(5, 5) }),
            makeMarkerPanel(true, 1)  // sub-process,  loop, parallel, sequential, ad doc and compensation markers
          )  // end Vertical Panel
        )
      );  // end Group

    //** need this in the subprocess group template above.
    //        $(go.Shape, "RoundedRectangle",  // the inner "Transaction" rounded rectangle
    //          { margin: 3,
    //            stretch: go.GraphObject.Fill,
    //            stroke: ActivityNodeStroke,
    //            parameter1: 8, fill: null, visible: false
    //          },
    //          new go.Binding("visible", "isTransaction")
    //         ),


  function groupStyle() {  // common settings for both Lane and Pool Groups
      return [
        {
            layerName: "Background",  // all pools and lanes are always behind all nodes and links
            background: "transparent",  // can grab anywhere in bounds
            movable: true, // allows users to re-order by dragging
            copyable: false,  // can't copy lanes or pools
            avoidable: false  // don't impede AvoidsNodes routed Links
        },
        new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify)
      ];
  }

    // hide links between lanes when either lane is collapsed
  function updateCrossLaneLinks(group) {
    group.findExternalLinksConnected().each(function(l) {
          l.visible = (l.fromNode.isVisible() && l.toNode.isVisible());
      });
  }

  var laneEventMenu =  // context menu for each lane
  $(go.Adornment, "Vertical",
    $("ContextMenuButton",
      $(go.TextBlock, "Add Lane"),
      // in the click event handler, the obj.part is the Adornment; its adornedObject is the port
        {click: function(e, obj) { addLaneEvent(obj.part.adornedObject); } })
   );

    // Add a lane to pool (lane parameter is lane above new lane)
  function addLaneEvent(lane) {
      myDiagram.startTransaction("addLane");
      if (lane != null && lane.data.category === "Lane") {
          // create a new lane data object
          var shape = lane.findObject("SHAPE");
          var size = new go.Size(shape.width, MINBREADTH);
          //size.height = MINBREADTH;
          var newlanedata = {
              category: "Lane",
              text: "New Lane",
              color: "white",
              isGroup: true,
              loc: go.Point.stringify(new go.Point(lane.location.x, lane.location.y + 1)), // place below selection
              size: go.Size.stringify(size),
              group: lane.data.group
          };
          // and add it to the model
          myDiagram.model.addNodeData(newlanedata);
      }
      myDiagram.commitTransaction("addLane");
  }

  var swimLanesGroupTemplate =
  $(go.Group, "Spot", groupStyle(),
    {
        name: "Lane",
        contextMenu: laneEventMenu,
        minLocation: new go.Point(NaN, -Infinity),  // only allow vertical movement
        maxLocation: new go.Point(NaN, Infinity),
        selectionObjectName: "SHAPE",  // selecting a lane causes the body of the lane to be highlit, not the label
        resizable: true, resizeObjectName: "SHAPE",  // the custom resizeAdornmentTemplate only permits two kinds of resizing
        layout: $(go.LayeredDigraphLayout,  // automatically lay out the lane's subgraph
                  {
                      isInitial: false,  // don't even do initial layout
                      isOngoing: false,  // don't invalidate layout when nodes or links are added or removed
                      direction: 0,
                      columnSpacing: 10,
                      layeringOption: go.LayeredDigraphLayout.LayerLongestPathSource
                  }),
        computesBoundsAfterDrag: true,  // needed to prevent recomputing Group.placeholder bounds too soon
        computesBoundsIncludingLinks: false,  // to reduce occurrences of links going briefly outside the lane
        computesBoundsIncludingLocation: true,  // to support empty space at top-left corner of lane
        handlesDragDropForMembers: true,  // don't need to define handlers on member Nodes and Links
        mouseDrop: function(e, grp) {  // dropping a copy of some Nodes and Links onto this Group adds them to this Group
            // don't allow drag-and-dropping a mix of regular Nodes and Groups
          if (!e.diagram.selection.any(function(n) { return (n instanceof go.Group && n.category !== "subprocess") || n.category === "privateProcess"; })) {
                var ok = grp.addMembers(grp.diagram.selection, true);
                if (ok) {
                    updateCrossLaneLinks(grp);
                    relayoutDiagram();
                } else {
                    grp.diagram.currentTool.doCancel();
                }
            }
        },
        subGraphExpandedChanged: function(grp) {
            var shp = grp.resizeObject;
            if (grp.diagram.undoManager.isUndoingRedoing) return;
            if (grp.isSubGraphExpanded) {
                shp.height = grp._savedBreadth;
            } else {
                grp._savedBreadth = shp.height;
                shp.height = NaN;
            }
            updateCrossLaneLinks(grp);
        }
    },
    //new go.Binding("isSubGraphExpanded", "expanded").makeTwoWay(),

    $(go.Shape, "Rectangle",  // this is the resized object
        {name: "SHAPE", fill: "white", stroke: null },  // need stroke null here or you gray out some of pool border.
      new go.Binding("fill", "color"),
      new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify)),

   // the lane header consisting of a Shape and a TextBlock
      $(go.Panel, "Horizontal",
      {
          name: "HEADER",
          angle: 270,  // maybe rotate the header to read sideways going up
          alignment: go.Spot.LeftCenter, alignmentFocus: go.Spot.LeftCenter
      },
        $(go.TextBlock,  // the lane label
          {editable: true, margin: new go.Margin(2, 0, 0, 8) },
          new go.Binding("visible", "isSubGraphExpanded").ofObject(),
          new go.Binding("text", "text").makeTwoWay()),
        $("SubGraphExpanderButton", { margin: 4, angle: -270 })  // but this remains always visible!
       ),  // end Horizontal Panel
      $(go.Placeholder,
        { padding: 12, alignment: go.Spot.TopLeft, alignmentFocus: go.Spot.TopLeft }),
    $(go.Panel, "Horizontal", { alignment: go.Spot.TopLeft, alignmentFocus: go.Spot.TopLeft },
      $(go.TextBlock,  // this TextBlock is only seen when the swimlane is collapsed
        {
            name: "LABEL",
            editable: true, visible: false,
            angle: 0, margin: new go.Margin(6, 0, 0, 20)
        },
          new go.Binding("visible", "isSubGraphExpanded", function(e) { return !e; }).ofObject(),
        new go.Binding("text", "text").makeTwoWay())
     )
  );  // end swimLanesGroupTemplate

    // define a custom resize adornment that has two resize handles if the group is expanded
    //myDiagram.groupTemplate.resizeAdornmentTemplate =
  swimLanesGroupTemplate.resizeAdornmentTemplate =
    $(go.Adornment, "Spot",
      $(go.Placeholder),
      $(go.Shape,  // for changing the length of a lane
        {
            alignment: go.Spot.Right,
            desiredSize: new go.Size(7, 50),
            fill: "lightblue", stroke: "dodgerblue",
            cursor: "col-resize"
        },
        new go.Binding("visible", "", function(ad) {
          if (ad.adornedPart === null) return false;
          return ad.adornedPart.isSubGraphExpanded;
        }).ofObject()),
      $(go.Shape,  // for changing the breadth of a lane
        {
            alignment: go.Spot.Bottom,
            desiredSize: new go.Size(50, 7),
            fill: "lightblue", stroke: "dodgerblue",
            cursor: "row-resize"
        },
        new go.Binding("visible", "", function(ad) {
          if (ad.adornedPart === null) return false;
          return ad.adornedPart.isSubGraphExpanded;
        }).ofObject())
    );

 var poolGroupTemplate =
    $(go.Group, "Auto", groupStyle(),
      {
        computesBoundsIncludingLinks: false,
        // use a simple layout that ignores links to stack the "lane" Groups on top of each other
        layout: $(PoolLayout, { spacing: new go.Size(0, 0) })  // no space between lanes
      },
      new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
      $(go.Shape,
        { fill: "white" },
        new go.Binding("fill", "color")),
      $(go.Panel, "Table",
        { defaultColumnSeparatorStroke: "black" },
        $(go.Panel, "Horizontal",
          { column: 0, angle: 270 },
          $(go.TextBlock,
            { editable: true, margin: new go.Margin(5, 0, 5, 0) },  // margin matches private process (black box pool)
            new go.Binding("text").makeTwoWay())
        ),
        $(go.Placeholder,
          { background: "darkgray", column: 1 })
      )
    ); // end poolGroupTemplate

  //------------------------------------------  Template Maps  ----------------------------------------------

  // create the nodeTemplateMap, holding main view node templates:
  var nodeTemplateMap = new go.Map("string", go.Node);
  // for each of the node categories, specify which template to use
  nodeTemplateMap.add("activity", activityNodeTemplate);
  nodeTemplateMap.add("event", eventNodeTemplate);
  nodeTemplateMap.add("gateway", gatewayNodeTemplate);
  nodeTemplateMap.add("annotation", annotationNodeTemplate);
  nodeTemplateMap.add("dataobject", dataObjectNodeTemplate);
  nodeTemplateMap.add("datastore", dataStoreNodeTemplate);
  nodeTemplateMap.add("privateProcess", privateProcessNodeTemplate);
  // for the default category, "", use the same template that Diagrams use by default
  // this just shows the key value as a simple TextBlock

  var groupTemplateMap = new go.Map("string", go.Group);
  groupTemplateMap.add("subprocess", subProcessGroupTemplate);
  groupTemplateMap.add("Lane", swimLanesGroupTemplate);
  groupTemplateMap.add("Pool", poolGroupTemplate);

  // create the nodeTemplateMap, holding special palette "mini" node templates:
  var palNodeTemplateMap = new go.Map("string", go.Node);
  palNodeTemplateMap.add("activity", activityNodeTemplateForPalette);
  palNodeTemplateMap.add("event", eventNodeTemplate);
  palNodeTemplateMap.add("gateway", gatewayNodeTemplateForPalette);
  palNodeTemplateMap.add("annotation", annotationNodeTemplate);
  palNodeTemplateMap.add("dataobject", dataObjectNodeTemplate);
  palNodeTemplateMap.add("datastore", dataStoreNodeTemplate);
  palNodeTemplateMap.add("privateProcess", privateProcessNodeTemplateForPalette);

  var palGroupTemplateMap = new go.Map("string", go.Group);
  palGroupTemplateMap.add("subprocess", subProcessGroupTemplateForPalette);
  palGroupTemplateMap.add("Pool", poolTemplateForPalette);
  palGroupTemplateMap.add("Lane", swimLanesGroupTemplateForPalette);


  //------------------------------------------  Link Templates   ----------------------------------------------

  var sequenceLinkTemplate =
    $(go.Link,
      { contextMenu:
          $(go.Adornment, "Vertical",
            $("ContextMenuButton",
              $(go.TextBlock, "Default Flow"),
              // in the click event handler, the obj.part is the Adornment; its adornedObject is the port
              { click: function(e, obj) { setSequenceLinkDefaultFlow(obj.part.adornedObject); } }),
            $("ContextMenuButton",
              $(go.TextBlock, "Conditional Flow"),
              // in the click event handler, the obj.part is the Adornment; its adornedObject is the port
              { click: function(e, obj) { setSequenceLinkConditionalFlow(obj.part.adornedObject); } })
           ),
           routing: go.Link.AvoidsNodes, curve: go.Link.JumpGap, corner: 10,
           //fromSpot: go.Spot.RightSide, toSpot: go.Spot.LeftSide,
           reshapable: true, relinkableFrom: true, relinkableTo: true, toEndSegmentLength: 20
      },
      new go.Binding("points").makeTwoWay(),
      $(go.Shape, { stroke: "black", strokeWidth: 1 }),
      $(go.Shape, { toArrow: "Triangle", scale: 1.2, fill: "black", stroke: null }),
      $(go.Shape, { fromArrow: "", scale: 1.5, stroke: "black", fill: "white" },
                  new go.Binding("fromArrow", "isDefault", function(s) {
                    if (s === null) return "";
                    return s ? "BackSlash" : "StretchedDiamond"; }),
                  new go.Binding("segmentOffset", "isDefault", function(s) {
                    return s ? new go.Point(5, 0) : new go.Point(0, 0);
                  })),
      $(go.TextBlock, { // this is a Link label
        name: "Label", editable: true, text: "label", segmentOffset: new go.Point(-10, -10), visible: false
        },
        new go.Binding("text", "text").makeTwoWay(),
        new go.Binding("visible", "visible").makeTwoWay())
   );

  // set Default Sequence Flow (backslash From Arrow)
  function setSequenceLinkDefaultFlow(obj) {
    myDiagram.startTransaction("setSequenceLinkDefaultFlow");
    var model = myDiagram.model;
    model.setDataProperty(obj.data, "isDefault", true);
    // Set all other links from the fromNode to be isDefault=null
    obj.fromNode.findLinksOutOf().each(function(link) {
      if (link !== obj && link.data.isDefault) {
        model.setDataProperty(link.data, "isDefault", null);
      }
    });
    myDiagram.commitTransaction("setSequenceLinkDefaultFlow");
  }

  // set Conditional Sequence Flow (diamond From Arrow)
  function setSequenceLinkConditionalFlow(obj) {
    myDiagram.startTransaction("setSequenceLinkConditionalFlow");
    var model = myDiagram.model;
    model.setDataProperty(obj.data, "isDefault", false);
    myDiagram.commitTransaction("setSequenceLinkConditionalFlow");
  }

  var messageFlowLinkTemplate =
     $(PoolLink, // defined in BPMNClasses.js
       { routing: go.Link.Orthogonal, curve: go.Link.JumpGap, corner: 10,
         fromSpot: go.Spot.TopBottomSides , toSpot: go.Spot.TopBottomSides,
         reshapable: true, relinkableTo: true, toEndSegmentLength: 20 },
       new go.Binding("points").makeTwoWay(),
       $(go.Shape, { stroke: "black", strokeWidth: 1, strokeDashArray: [6, 2] }),
       $(go.Shape, { toArrow: "Triangle", scale: 1, fill: "white", stroke: "black" }),
       $(go.Shape, { fromArrow: "Circle", scale: 1, visible: true, stroke: "black", fill: "white" }),
       $(go.TextBlock, {
         editable: true, text: "label"
       }, // Link label
       new go.Binding("text", "text").makeTwoWay())
    );

  var dataAssociationLinkTemplate =
    $(go.Link,
      { routing: go.Link.AvoidsNodes, curve: go.Link.JumpGap, corner: 10,
        fromSpot: go.Spot.AllSides , toSpot: go.Spot.AllSides,
        reshapable: true, relinkableFrom: true, relinkableTo: true },
      new go.Binding("points").makeTwoWay(),
      $(go.Shape, { stroke: "black", strokeWidth: 1, strokeDashArray: [1, 3] }),
      $(go.Shape, { toArrow: "OpenTriangle", scale: 1, fill: null, stroke: "blue" })
   );

  var annotationAssociationLinkTemplate =
    $(go.Link,
      { reshapable: true, relinkableFrom: true, relinkableTo: true,
        toSpot: go.Spot.AllSides,
        toEndSegmentLength: 20, fromEndSegmentLength: 40 },
      new go.Binding("points").makeTwoWay(),
      $(go.Shape, { stroke: "black", strokeWidth: 1, strokeDashArray: [1, 3] }),
      $(go.Shape, { toArrow: "OpenTriangle", scale: 1, stroke: "black" })
   );

  var linkTemplateMap = new go.Map("string", go.Link);
  linkTemplateMap.add("msg", messageFlowLinkTemplate);
  linkTemplateMap.add("annotation", annotationAssociationLinkTemplate);
  linkTemplateMap.add("data", dataAssociationLinkTemplate);
  linkTemplateMap.add("", sequenceLinkTemplate);  // default


  //------------------------------------------the main Diagram----------------------------------------------

  window.myDiagram =
    $(go.Diagram, "myDiagramDiv",
      {
        nodeTemplateMap: nodeTemplateMap,
        linkTemplateMap: linkTemplateMap,
        groupTemplateMap: groupTemplateMap,

        allowDrop: true,  // accept drops from palette

        commandHandler: new DrawCommandHandler(),  // defined in DrawCommandHandler.js
        // default to having arrow keys move selected nodes
        "commandHandler.arrowKeyBehavior": "move",

        mouseDrop: function(e) {
          // when the selection is dropped in the diagram's background,
          // make sure the selected Parts no longer belong to any Group
          var ok = myDiagram.commandHandler.addTopLevelParts(myDiagram.selection, true);
          if (!ok) myDiagram.currentTool.doCancel();
        },
        linkingTool: new BPMNLinkingTool(), // defined in BPMNClasses.js
        "SelectionMoved": relayoutDiagram,  // defined below
        "SelectionCopied": relayoutDiagram
      });

  myDiagram.toolManager.mouseDownTools.insertAt(0, new LaneResizingTool());

  myDiagram.addDiagramListener("LinkDrawn", function(e) {
    if (e.subject.fromNode.category === "annotation") {
      e.subject.category = "annotation"; // annotation association
    } else if (e.subject.fromNode.category === "dataobject" || e.subject.toNode.category === "dataobject") {
      e.subject.category = "data"; // data association
    } else if (e.subject.fromNode.category === "datastore" || e.subject.toNode.category === "datastore") {
      e.subject.category = "data"; // data association
    }
  });

//  uncomment this if you want a subprocess to expand on drop.  We decided we didn't like this behavior
//  myDiagram.addDiagramListener("ExternalObjectsDropped", function(e) {
//    // e.subject is the collection that was just dropped
//    e.subject.each(function(part) {
//        if (part instanceof go.Node && part.data.item === "end") {
//          part.move(new go.Point(part.location.x  + 350, part.location.y))
//        }
//      });
//    myDiagram.commandHandler.expandSubGraph();
//  });

  // change the title to indicate that the diagram has been modified
  myDiagram.addDiagramListener("Modified", function(e) {
    var currentFile = document.getElementById("currentFile");
    var idx = currentFile.textContent.indexOf("*");
    if (myDiagram.isModified) {
      if (idx < 0) currentFile.textContent = currentFile.textContent + "*";
    } else {
      if (idx >= 0) currentFile.textContent = currentFile.textContent.substr(0, idx);
    }
  });


  //------------------------------------------  Palette   ----------------------------------------------

    // Make sure the pipes are ordered by their key in the palette inventory
    function keyCompare(a, b) {
      var at = a.data.key;
      var bt = b.data.key;
      if (at < bt) return -1;
      if (at > bt) return 1;
      return 0;
    }

    // initialize the first Palette, BPMN Spec Level 1
    var myPaletteLevel1 =
      $(go.Palette, "myPaletteLevel1",
        { // share the templates with the main Diagram
        nodeTemplateMap: palNodeTemplateMap,
          groupTemplateMap: palGroupTemplateMap,
          layout: $(go.GridLayout,
                    {cellSize: new go.Size(1, 1),
                     spacing: new go.Size(5, 5),
                     comparer: keyCompare
                    })
        });

    // initialize the second Palette, BPMN Spec Level 2
    var myPaletteLevel2 =
      $(go.Palette, "myPaletteLevel2",
        { // share the templates with the main Diagram
        nodeTemplateMap: palNodeTemplateMap,
          groupTemplateMap: palGroupTemplateMap,
          layout: $(go.GridLayout,
                    {cellSize: new go.Size(1, 1),
                     spacing: new go.Size(5, 5),
                     comparer: keyCompare
                    })
        });

    // initialize the third Palette, random other stuff
    var myPaletteLevel3 =
      $(go.Palette, "myPaletteLevel3",
        { // share the templates with the main Diagram
        nodeTemplateMap: palNodeTemplateMap,
          groupTemplateMap: palGroupTemplateMap,
          layout: $(go.GridLayout,
                    {cellSize: new go.Size(1, 1),
                     spacing: new go.Size(5, 5),
                     comparer: keyCompare
                    })
        });

   jQuery("#accordion").accordion({
      activate: function(event, ui) {
        myPaletteLevel1.requestUpdate();
        myPaletteLevel2.requestUpdate();
      }
    });

  myPaletteLevel1.model = $(go.GraphLinksModel,
    {
      copiesArrays: true,
      copiesArrayObjects: true,
      nodeDataArray: [
      // -------------------------- Event Nodes
        { key: 101, category: "event", text: "Start",   eventType: 1, eventDimension: 1, item: "start"},
        { key: 102, category: "event", text: "Message", eventType: 2, eventDimension: 2, item: "Message"}, // BpmnTaskMessage
        { key: 103, category: "event", text: "Timer",   eventType: 3, eventDimension: 3, item: "Timer"},
        { key: 104, category: "event", text: "End",     eventType: 1, eventDimension: 8, item: "End"},
        { key: 107, category: "event", text: "Message", eventType: 2, eventDimension: 8, item: "Message"},// BpmnTaskMessage
        { key: 108, category: "event", text: "Terminate", eventType: 13, eventDimension: 8, item: "Terminate"},
      // -------------------------- Task/Activity Nodes
        { key: 131, category: "activity", text: "Task", item: "generic task", taskType: 0},
        { key: 132, category: "activity", text: "User Task", item: "User task", taskType: 2},
        { key: 133, category: "activity", text: "Service\nTask", item: "service task", taskType: 6},
      // subprocess and start and end
        { key: 134, category: "subprocess", loc: "0 0", text: "Subprocess", isGroup: true, isSubProcess: true, taskType: 0 },
          { key: -802, category: "event", loc: "0 0", group: 134,  text: "Start", eventType: 1, eventDimension: 1, item: "start" },
          { key: -803, category: "event", loc: "350 0", group: 134,  text: "End", eventType: 1, eventDimension: 8, item: "end", name: "end" },
      // -------------------------- Gateway Nodes, Data, Pool and Annotation
        { key: 201, category: "gateway", text: "Parallel", gatewayType: 1},
        { key: 204, category: "gateway", text: "Exclusive", gatewayType: 4},
        { key: 301, category: "dataobject", text: "Data\nObject"},
        { key: 302, category: "datastore", text: "Data\nStorage"},
        { key: 401, category: "privateProcess", text: "Black Box"},
        { key: "501", "text": "Pool 1", "isGroup": "true", "category": "Pool" },
          { key: "Lane5", "text": "Lane 1", "isGroup": "true", "group": "501", "color": "lightyellow", "category": "Lane" },
          { key: "Lane6", "text": "Lane 2", "isGroup": "true", "group": "501", "color": "lightgreen", "category": "Lane" },
        { key: 701, category: "annotation", text: "note"}
      ]  // end nodeDataArray
    });  // end model

    // an activity with a boundary event:
//        {
//          key: 1,
//          category: "activity",
//          text: "Message",
//          taskType: 1,
//          item: "Message Task",
//          boundaryEventArray: [{ "portId": "be0", alignmentIndex: 0, eventType: 2, color: "white" }]   // portId # and alignmentIndex should match
//        },

  myPaletteLevel2.model = $(go.GraphLinksModel,
    {
      copiesArrays: true,
      copiesArrayObjects: true,
      nodeDataArray: [
    { key: 1, category: "activity", taskType: 1, text: "Receive Task", item: "Receive Task" },
    { key: 2, category: "activity", taskType: 5, text: "Send Task", item: "Send Task" },
    { key: 3, category: "activity", taskType: 7, text: "Business\nRule Task", item: "Business Rule Task" },
    { key: 4, category: "activity", taskType: 2, text: "User Task", item: "User Task", isCall: true},

    { key: 101, text: "Adhoc\nSubprocess", isGroup: true, isSubProcess: true, category: "subprocess", isAdHoc: true, taskType: 0, loc: "0 0" },
    { key: -812, group: 101, category: "event", text: "Start", eventType: 1, eventDimension: 1, item: "start", loc: "0 0" },
    { key: -813, group: 101, category: "event", text: "End", eventType: 1, eventDimension: 8, item: "end", name: "end" },

    { key: 102, text: "Transactional\nSubprocess", isGroup: true, isSubProcess: true, category: "subprocess", isTransaction: true, taskType: 0, loc: "0 0" },
    { key: -822, group: 102, category: "event", text: "Start", eventType: 1, eventDimension: 1, item: "start", loc: "0 0" },
    { key: -823, group: 102, category: "event", text: "End", eventType: 1, eventDimension: 8, item: "end", name: "end", loc: "350 0" },

    { key: 103, text: "Looping\nActivity", isGroup: true, isLoop: true,  isSubProcess: true, category: "subprocess", taskType: 0, loc: "0 0" },
    { key: -831, group: 103, category: "event", text: "Start", eventType: 1, eventDimension: 1, item: "start", loc: "0 0" },
    { key: -832, group: 103, category: "event", text: "End", eventType: 1, eventDimension: 8, item: "end", name: "end", loc: "350 0" },

    { key: 104, text: "Multi-Instance\nActivity", isGroup: true, isSubProcess: true, isParallel: true, category: "subprocess", taskType: 0, loc: "0 0" },
    { key: -841, group: 104, category: "event", text: "Start", eventType: 1, eventDimension: 1, item: "start", loc: "0 0" },
    { key: -842, group: 104, category: "event", text: "End", eventType: 1, eventDimension: 8, item: "end", name: "end", loc: "350 0" },

    { key: 105, text: "Call\nSubprocess", isGroup: true, isSubProcess: true, category: "subprocess", isCall: true, taskType: 0, loc: "0 0" },
    { key: -861, group: 105, category: "event", text: "Start", eventType: 1, eventDimension: 1, item: "start", loc: "0 0" },
    { key: -862, group: 105, category: "event", text: "End", eventType: 1, eventDimension: 8, item: "end", name: "end", loc: "350 0" },

     // gateway nodes
    { key: 301, category: "gateway", gatewayType: 2, text: "Inclusive" },
    { key: 302, category: "gateway", gatewayType: 5, text: "Event\nGateway" },

    // events
    { key: 401, category: "event", eventType: 5, eventDimension: 1, text: "Conditional\nStart", item: "BpmnEventConditional" },
    { key: 402, category: "event", eventType: 10, eventDimension: 1, text: "Signal\nStart", item: "BpmnEventSignal" },  // start signal
    { key: 403, category: "event", eventType: 10, eventDimension: 8, text: "Signal\nEnd", item: "end signal" },
    { key: 404, category: "event", eventType: 7, eventDimension: 8, text: "Error", item: "BpmnEventError" },
    { key: 405, category: "event", eventType: 4, eventDimension: 8, text: "Escalation", item: "BpmnEventEscalation" },
     // throwing / catching intermedicate events
        { key: 502, category: "event", eventType: 6, eventDimension: 4, text: "Catch\nLink", item: "BpmnEventOffPage" },
        { key: 503, category: "event", eventType: 6, eventDimension: 7, text: "Throw\nLink", item: "BpmnEventOffPage" },
        { key: 504, category: "event", eventType: 2, eventDimension: 4, text: "Catch\nMessage", item: "Message"},
        { key: 505, category: "event", eventType: 2, eventDimension: 7, text: "Throw\nMessage", item: "Message"},
        { key: 506, category: "event", eventType: 5, eventDimension: 4, text: "Catch\nConditional", item: ""},
        { key: 507, category: "event", eventType: 3, eventDimension: 4, text: "Catch\nTimer", item: ""},
        { key: 508, category: "event", eventType: 4, eventDimension: 7, text: "Throw\nEscalation", item: "Escalation"},
        { key: 509, category: "event", eventType: 10, eventDimension: 4, text: "Catch\nSignal", item: "" },
        { key: 510, category: "event", eventType: 10, eventDimension: 7, text: "Throw\nSignal", item: "" }
      ]  // end nodeDataArray
    });  // end model

  myPaletteLevel3.model = $(go.GraphLinksModel,
    {
      copiesArrays: true,
      copiesArrayObjects: true,
      nodeDataArray: [
    { key: 108, category: "event", eventType: 8, eventDimension: 5, text: "Cancel", item: "BpmnEventCancel" },
    { key: 109, category: "event", eventType: 9, eventDimension: 5, text: "Compensation", item: "BpmnEventCompensation"},

    { key: 111, category: "event", eventType: 11, eventDimension: 1, text: "Multiple", item: "Multiple" },
    { key: 112, category: "event", eventType: 12, eventDimension: 1, text: "Parallel", item: "Parallel" },
    // activity nodes
    { key: 203, category: "activity", taskType: 3, isAdHoc: true, text: "Manual", item: "Manual Task" },
    { key: 204, category: "activity", taskType: 4, isSequential: true, text: "Script", item: "Script Task" },
    { key: 205, category: "activity", taskType: 5, isParallel: true, text: "Send Msg", item: "Send Msg Task" },
    { key: 206, category: "activity", taskType: 6, isLoop: true, isSubProcess: true, isTransaction: true, text: "Service", item: "service task" },

    // gateway nodes not in Level 1 or Level 2
        { key: 603, category: "gateway", text: "Complex", gatewayType: 3 },
        { key: 606, category: "gateway", text: "Exclusive Start", gatewayType: 6 },
        { key: 607, category: "gateway", text: "Parallel Start", gatewayType: 7 },

     { key: 4, category: "activity", taskType: 2, text: "User Task", item: "User Task",
          isCall: true, isLoop: true, isParallel: true, isSequential: true }
      ]  // end nodeDataArray
    });  // end model

  //------------------------------------------  Overview   ----------------------------------------------

  var myOverview =
    $(go.Overview, "myOverviewDiv",
      { observed: myDiagram, maxScale: 0.5, contentAlignment: go.Spot.Center });
  // change color of viewport border in Overview
  myOverview.box.elt(0).stroke = "dodgerblue";

  // start with a simple preset model:
  loadJSON("BPMNdata/OMG BPMN by Example Figure 5.1.json")

} // end init


//------------------------------------------  pools / lanes   ----------------------------------------------

// swimlanes
var MINLENGTH = 400;  // this controls the minimum length of any swimlane
var MINBREADTH = 20;  // this controls the minimum breadth of any non-collapsed swimlane

// some shared functions

// this is called after nodes have been moved or lanes resized, to layout all of the Pool Groups again
function relayoutDiagram() {
  myDiagram.layout.invalidateLayout();
  myDiagram.findTopLevelGroups().each(function(g) { if (g.category === "Pool") g.layout.invalidateLayout(); });
  myDiagram.layoutDiagram();
}

// compute the minimum size of a Pool Group needed to hold all of the Lane Groups
function computeMinPoolSize(pool) {
  // assert(pool instanceof go.Group && pool.category === "Pool");
  var len = MINLENGTH;
  pool.memberParts.each(function(lane) {
    // pools ought to only contain lanes, not plain Nodes
    if (!(lane instanceof go.Group)) return;
    var holder = lane.placeholder;
    if (holder !== null) {
      var sz = holder.actualBounds;
      len = Math.max(len, sz.width);
    }
  });
  return new go.Size(len, NaN);
}

// compute the minimum size for a particular Lane Group
function computeLaneSize(lane) {
  // assert(lane instanceof go.Group && lane.category !== "Pool");
  var sz = computeMinLaneSize(lane);
  if (lane.isSubGraphExpanded) {
    var holder = lane.placeholder;
    if (holder !== null) {
      var hsz = holder.actualBounds;
      sz.height = Math.max(sz.height, hsz.height);
    }
  }
  // minimum breadth needs to be big enough to hold the header
  var hdr = lane.findObject("HEADER");
  if (hdr !== null) sz.height = Math.max(sz.height, hdr.actualBounds.height);
  return sz;
}

// determine the minimum size of a Lane Group, even if collapsed
function computeMinLaneSize(lane) {
  if (!lane.isSubGraphExpanded) return new go.Size(MINLENGTH, 1);
  return new go.Size(MINLENGTH, MINBREADTH);
}


// define a custom ResizingTool to limit how far one can shrink a lane Group
function LaneResizingTool() {
  go.ResizingTool.call(this);
}
go.Diagram.inherit(LaneResizingTool, go.ResizingTool);

LaneResizingTool.prototype.isLengthening = function() {
  return (this.handle.alignment === go.Spot.Right);
};

/** @override */
LaneResizingTool.prototype.computeMinSize = function() {
  var lane = this.adornedObject.part;
  // assert(lane instanceof go.Group && lane.category !== "Pool");
  var msz = computeMinLaneSize(lane);  // get the absolute minimum size
  if (this.isLengthening()) {  // compute the minimum length of all lanes
    var sz = computeMinPoolSize(lane.containingGroup);
    msz.width = Math.max(msz.width, sz.width);
  } else {  // find the minimum size of this single lane
    var sz = computeLaneSize(lane);
    msz.width = Math.max(msz.width, sz.width);
    msz.height = Math.max(msz.height, sz.height);
  }
  return msz;
};

/** @override */
LaneResizingTool.prototype.canStart = function() {
  if (!go.ResizingTool.prototype.canStart.call(this)) return false;

  // if this is a resize handle for a "Lane", we can start.
  var diagram = this.diagram;
  if (diagram === null) return;
  var handl = this.findToolHandleAt(diagram.firstInput.documentPoint, this.name);
  if (handl === null || handl.part === null || handl.part.adornedObject === null || handl.part.adornedObject.part === null) return false;
  return (handl.part.adornedObject.part.category === "Lane");
}

/** @override */
LaneResizingTool.prototype.resize = function(newr) {
  var lane = this.adornedObject.part;
  if (this.isLengthening()) {  // changing the length of all of the lanes
    lane.containingGroup.memberParts.each(function(lane) {
      if (!(lane instanceof go.Group)) return;
      var shape = lane.resizeObject;
      if (shape !== null) {  // set its desiredSize length, but leave each breadth alone
        shape.width = newr.width;
      }
    });
  } else {  // changing the breadth of a single lane
    go.ResizingTool.prototype.resize.call(this, newr);
  }
  relayoutDiagram();  // now that the lane has changed size, layout the pool again
};
// end LaneResizingTool class


// define a custom grid layout that makes sure the length of each lane is the same
// and that each lane is broad enough to hold its subgraph
function PoolLayout() {
  go.GridLayout.call(this);
  this.cellSize = new go.Size(1, 1);
  this.wrappingColumn = 1;
  this.wrappingWidth = Infinity;
  this.isRealtime = false;  // don't continuously layout while dragging
  this.alignment = go.GridLayout.Position;
  // This sorts based on the location of each Group.
  // This is useful when Groups can be moved up and down in order to change their order.
  this.comparer = function(a, b) {
    var ay = a.location.y;
    var by = b.location.y;
    if (isNaN(ay) || isNaN(by)) return 0;
    if (ay < by) return -1;
    if (ay > by) return 1;
    return 0;
  };
}
go.Diagram.inherit(PoolLayout, go.GridLayout);

/** @override */
PoolLayout.prototype.doLayout = function(coll) {
  var diagram = this.diagram;
  if (diagram === null) return;
  diagram.startTransaction("PoolLayout");
  var pool = this.group;
  if (pool !== null && pool.category === "Pool") {
    // make sure all of the Group Shapes are big enough
    var minsize = computeMinPoolSize(pool);
    pool.memberParts.each(function(lane) {
      if (!(lane instanceof go.Group)) return;
      if (lane.category !== "Pool") {
        var shape = lane.resizeObject;
        if (shape !== null) {  // change the desiredSize to be big enough in both directions
          var sz = computeLaneSize(lane);
          shape.width = (isNaN(shape.width) ? minsize.width : Math.max(shape.width, minsize.width));
          shape.height = (!isNaN(shape.height)) ? Math.max(shape.height, sz.height) : sz.height;
          var cell = lane.resizeCellSize;
          if (!isNaN(shape.width) && !isNaN(cell.width) && cell.width > 0) shape.width = Math.ceil(shape.width / cell.width) * cell.width;
          if (!isNaN(shape.height) && !isNaN(cell.height) && cell.height > 0) shape.height = Math.ceil(shape.height / cell.height) * cell.height;
        }
      }
    });
  }
  // now do all of the usual stuff, according to whatever properties have been set on this GridLayout
  go.GridLayout.prototype.doLayout.call(this, coll);
  diagram.commitTransaction("PoolLayout");
};
// end PoolLayout class


//------------------------------------------  Commands for this application  ----------------------------------------------

// Add a port to the specified side of the selected nodes.   name is beN  (be0, be1)
// evDim is 5 for Interrupting, 6 for non-Interrupting
function addActivityNodeBoundaryEvent(evType, evDim) {
  myDiagram.startTransaction("addBoundaryEvent");
  myDiagram.selection.each(function(node) {
    // skip any selected Links
    if (!(node instanceof go.Node)) return;
    if (node.data && (node.data.category === "activity" || node.data.category === "subprocess")) {
      // compute the next available index number for the side
      var i = 0;
      var defaultPort = node.findPort("");
      while (node.findPort("be" + i.toString()) !== defaultPort) i++;           // now this new port name is unique within the whole Node because of the side prefix
      var name = "be" + i.toString();
      if (!node.data.boundaryEventArray) {myDiagram.model.setDataProperty(node.data, "boundaryEventArray", []);}       // initialize the Array of port data if necessary
      // create a new port data object
      var newportdata = {
          portId: name,
          eventType: evType,
          eventDimension: evDim,
          color: "white",
          alignmentIndex: i
          // if you add port data properties here, you should copy them in copyPortData above  ** BUG...  we don't do that.
        };
        // and add it to the Array of port data
      myDiagram.model.insertArrayItem(node.data.boundaryEventArray, -1, newportdata);
    }
  });
  myDiagram.commitTransaction("addBoundaryEvent");
}

// changes the item of the object
function rename(obj) {
  myDiagram.startTransaction("rename");
  var newName = prompt("Rename " + obj.part.data.item + " to:");
  myDiagram.model.setDataProperty(obj.part.data, "item", newName);
  myDiagram.commitTransaction("rename");
}

// shows/hides gridlines
// to be implemented onclick of a button
function updateGridOption() {
  myDiagram.startTransaction("grid");
  var grid = document.getElementById("grid");
  myDiagram.grid.visible = grid.checked;
  myDiagram.commitTransaction("grid");
}

// enables/disables snapping tools, to be implemented by buttons
function updateSnapOption() {
  // no transaction needed, because we are modifying tools for future use
  var snap = document.getElementById("snap");
  if (snap.checked) {
    myDiagram.toolManager.draggingTool.isGridSnapEnabled = true;
    myDiagram.toolManager.resizingTool.isGridSnapEnabled = true;
  } else {
    myDiagram.toolManager.draggingTool.isGridSnapEnabled = false;
    myDiagram.toolManager.resizingTool.isGridSnapEnabled = false;
  }
}

// user specifies the amount of space between nodes when making rows and column
function askSpace() {
  var space = prompt("Desired space between nodes (in pixels):", "0");
  return space;
}

var UnsavedFileName = "(Unsaved File)";

function getCurrentFileName() {
  var currentFile = document.getElementById("currentFile");
  var name = currentFile.textContent;
  if (name[name.length - 1] === "*") return name.substr(0, name.length - 1);
  return name;
}

function setCurrentFileName(name) {
  var currentFile = document.getElementById("currentFile");
  if (myDiagram.isModified) {
    name += "*";
  }
  currentFile.textContent = name;
}

function newDocument() {
  // checks to see if all changes have been saved
  if (myDiagram.isModified) {
    var save = confirm("Would you like to save changes to " + getCurrentFileName() + "?");
    if (save) {
      saveDocument();
    }
  }
  setCurrentFileName(UnsavedFileName);
  // loads an empty diagram
  myDiagram.model = new go.GraphLinksModel();
  resetModel();
}

function resetModel() {
  myDiagram.model.undoManager.isEnabled = true;
  myDiagram.model.linkFromPortIdProperty = "fromPort";
  myDiagram.model.linkToPortIdProperty = "toPort";

  myDiagram.model.copiesArrays = true;
  myDiagram.model.copiesArrayObjects = true;
  myDiagram.isModified = false;
}

function checkLocalStorage() {
  return (typeof (Storage) !== "undefined") && (window.localStorage !== undefined);
}

// saves the current floor plan to local storage
function saveDocument() {
  if (checkLocalStorage()) {
    var saveName = getCurrentFileName();
    if (saveName === UnsavedFileName) {
      saveDocumentAs();
    } else {
      saveDiagramProperties()
      window.localStorage.setItem(saveName, myDiagram.model.toJson());
      myDiagram.isModified = false;
    }
  }
}

// saves floor plan to local storage with a new name
function saveDocumentAs() {
  if (checkLocalStorage()) {
    var saveName = prompt("Save file as...", getCurrentFileName());
    if (saveName && saveName !== UnsavedFileName) {
      setCurrentFileName(saveName);
      saveDiagramProperties()
      window.localStorage.setItem(saveName, myDiagram.model.toJson());
      myDiagram.isModified = false;
    }
  }
}

// checks to see if all changes have been saved -> shows the open HTML element
function openDocument() {
  if (checkLocalStorage()) {
    if (myDiagram.isModified) {
      var save = confirm("Would you like to save changes to " + getCurrentFileName() + "?");
      if (save) {
        saveDocument();
      }
    }
    openElement("openDocument", "mySavedFiles");
  }
}

// shows the remove HTML element
function removeDocument() {
  if (checkLocalStorage()) {
    openElement("removeDocument", "mySavedFiles2");
  }
}

// these functions are called when panel buttons are clicked

function loadFile() {
  var listbox = document.getElementById("mySavedFiles");
  // get selected filename
  var fileName = undefined;
  for (var i = 0; i < listbox.options.length; i++) {
    if (listbox.options[i].selected) fileName = listbox.options[i].text; // selected file
  }
  if (fileName !== undefined) {
    // changes the text of "currentFile" to be the same as the floor plan now loaded
    setCurrentFileName(fileName);
    // actually load the model from the JSON format string
    var savedFile = window.localStorage.getItem(fileName);
    myDiagram.model = go.Model.fromJson(savedFile);
    loadDiagramProperties();
    myDiagram.model.undoManager.isEnabled = true;
    myDiagram.isModified = false;
    // eventually loadDiagramProperties will be called to finish
    // restoring shared saved model/diagram properties
  }
  closeElement("openDocument");
}

function loadJSON(file) {
    jQuery.getJSON(file, function (jsondata) {
      // set these kinds of Diagram properties after initialization, not now
      myDiagram.addDiagramListener("InitialLayoutCompleted", loadDiagramProperties);  // defined below
      // create the model from the data in the JavaScript object parsed from JSON text
      //myDiagram.model = new go.GraphLinksModel(jsondata["nodes"], jsondata["links"]);
      myDiagram.model = go.Model.fromJson(jsondata);
      loadDiagramProperties();
      myDiagram.model.undoManager.isEnabled = true;
      myDiagram.isModified = false;
    });
  }

// Store shared model state in the Model.modelData property
// (will be loaded by loadDiagramProperties)
function saveDiagramProperties() {
  myDiagram.model.modelData.position = go.Point.stringify(myDiagram.position);
}

// Called by loadFile and loadJSON.
function loadDiagramProperties(e) {
  // set Diagram.initialPosition, not Diagram.position, to handle initialization side-effects
  var pos = myDiagram.model.modelData.position;
  if (pos) myDiagram.initialPosition = go.Point.parse(pos);
}


// deletes the selected file from local storage
function removeFile() {
  var listbox = document.getElementById("mySavedFiles2");
  // get selected filename
  var fileName = undefined;
  for (var i = 0; i < listbox.options.length; i++) {
    if (listbox.options[i].selected) fileName = listbox.options[i].text; // selected file
  }
  if (fileName !== undefined) {
    // removes file from local storage
    window.localStorage.removeItem(fileName);
    // the current document remains open, even if its storage was deleted
  }
  closeElement("removeDocument");
}

function updateFileList(id) {
  // displays cached floor plan files in the listboxes
  var listbox = document.getElementById(id);
  // remove any old listing of files
  var last;
  while (last = listbox.lastChild) listbox.removeChild(last);
  // now add all saved files to the listbox
  for (var key in window.localStorage) {
    var storedFile = window.localStorage.getItem(key);
    if (!storedFile) continue;
    var option = document.createElement("option");
    option.value = key;
    option.text = key;
    listbox.add(option, null);
  }
}

function openElement(id, listid) {
  var panel = document.getElementById(id);
  if (panel.style.visibility === "hidden") {
    updateFileList(listid);
    panel.style.visibility = "visible";
  }
}

// hides the open/remove elements when the "cancel" button is pressed
function closeElement(id) {
  var panel = document.getElementById(id);
  if (panel.style.visibility === "visible") {
    panel.style.visibility = "hidden";
  }
}