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processFlow.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Process Flow</title>
<meta name="description" content="A simple process flow or SCADA diagram editor, simulating equipment monitoring and control." />
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Copyright 1998-2019 by Northwoods Software Corporation. -->
<script src="../release/go.js"></script>
<script src="../extensions/Figures.js"></script>
<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
<script id="code">
function init() {
if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
var $ = go.GraphObject.make; // for more concise visual tree definitions
myDiagram =
$(go.Diagram, "myDiagramDiv",
{
"grid.visible": true,
"grid.gridCellSize": new go.Size(30, 20),
"draggingTool.isGridSnapEnabled": true,
"resizingTool.isGridSnapEnabled": true,
"rotatingTool.snapAngleMultiple": 90,
"rotatingTool.snapAngleEpsilon": 45,
"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("SaveButton");
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);
}
});
myDiagram.nodeTemplateMap.add("Process",
$(go.Node, "Auto",
{
locationSpot: new go.Spot(0.5, 0.5), locationObjectName: "SHAPE",
resizable: true, resizeObjectName: "SHAPE"
},
new go.Binding("location", "pos", go.Point.parse).makeTwoWay(go.Point.stringify),
$(go.Shape, "Cylinder1",
{
name: "SHAPE",
strokeWidth: 2,
fill: $(go.Brush, "Linear",
{
start: go.Spot.Left, end: go.Spot.Right,
0: "gray", 0.5: "white", 1: "gray"
}),
minSize: new go.Size(50, 50),
portId: "", fromSpot: go.Spot.AllSides, toSpot: go.Spot.AllSides
},
new go.Binding("desiredSize", "size", go.Size.parse).makeTwoWay(go.Size.stringify)),
$(go.TextBlock,
{
alignment: go.Spot.Center, textAlign: "center", margin: 5,
editable: true
},
new go.Binding("text").makeTwoWay())
));
myDiagram.nodeTemplateMap.add("Valve",
$(go.Node, "Vertical",
{
locationSpot: new go.Spot(0.5, 1, 0, -21), locationObjectName: "SHAPE",
selectionObjectName: "SHAPE", rotatable: true
},
new go.Binding("angle").makeTwoWay(),
new go.Binding("location", "pos", go.Point.parse).makeTwoWay(go.Point.stringify),
$(go.TextBlock,
{ alignment: go.Spot.Center, textAlign: "center", margin: 5, editable: true },
new go.Binding("text").makeTwoWay(),
// keep the text upright, even when the whole node has been rotated upside down
new go.Binding("angle", "angle", function(a) { return a === 180 ? 180 : 0; }).ofObject()),
$(go.Shape,
{
name: "SHAPE",
geometryString: "F1 M0 0 L40 20 40 0 0 20z M20 10 L20 30 M12 30 L28 30",
strokeWidth: 2,
fill: $(go.Brush, "Linear", { 0: "gray", 0.35: "white", 0.7: "gray" }),
portId: "", fromSpot: new go.Spot(1, 0.35), toSpot: new go.Spot(0, 0.35)
})
));
myDiagram.linkTemplate =
$(go.Link,
{ routing: go.Link.AvoidsNodes, curve: go.Link.JumpGap, corner: 10, reshapable: true, toShortLength: 7 },
new go.Binding("points").makeTwoWay(),
// mark each Shape to get the link geometry with isPanelMain: true
$(go.Shape, { isPanelMain: true, stroke: "black", strokeWidth: 5 }),
$(go.Shape, { isPanelMain: true, stroke: "gray", strokeWidth: 3 }),
$(go.Shape, { isPanelMain: true, stroke: "white", strokeWidth: 1, name: "PIPE", strokeDashArray: [10, 10] }),
$(go.Shape, { toArrow: "Triangle", fill: "black", stroke: null })
);
load();
loop(); // animate some flow through the pipes
}
function loop() {
var diagram = myDiagram;
setTimeout(function() {
var oldskips = diagram.skipsUndoManager;
diagram.skipsUndoManager = true;
diagram.links.each(function(link) {
var shape = link.findObject("PIPE");
var off = shape.strokeDashOffset - 2;
shape.strokeDashOffset = (off <= 0) ? 20 : off;
});
diagram.skipsUndoManager = oldskips;
loop();
}, 100);
}
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">
<div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:500px"></div>
<p>
A <em>process flow diagram</em> is commonly used in chemical and process engineering to indicate the general flow of plant processes and equipment.
A simple SCADA diagram, with animation of the flow along the pipes, is implemented here.
</p>
<p>
The diagram displays the background grid layer by setting <b>grid.visible</b> to true,
and also allows snapping to the grid using <a>DraggingTool.isGridSnapEnabled</a>,
<a>ResizingTool.isGridSnapEnabled</a>, and <a>RotatingTool.snapAngleMultiple</a> alongside <a>RotatingTool.snapAngleEpsilon</a>.
</p>
<p>
The diagram also uses the <b>loop</b> function to animate the links by adjusting the <a>Shape.strokeDashOffset</a> every 100 ms.
</p>
<div>
<div>
<button id="SaveButton" onclick="save()">Save</button>
<button onclick="load()">Load</button>
Diagram Model saved in JSON format:
</div>
<textarea id="mySavedModel" style="width:100%;height:300px">
{ "class": "go.GraphLinksModel",
"nodeDataArray": [
{"key":"P1", "category":"Process", "pos":"150 120", "text":"Process"},
{"key":"P2", "category":"Process", "pos":"330 320", "text":"Tank"},
{"key":"V1", "category":"Valve", "pos":"270 120", "text":"V1"},
{"key":"P3", "category":"Process", "pos":"150 420", "text":"Pump"},
{"key":"V2", "category":"Valve", "pos":"150 280", "text":"VM", "angle":270},
{"key":"V3", "category":"Valve", "pos":"270 420", "text":"V2", "angle":180},
{"key":"P4", "category":"Process", "pos":"450 140", "text":"Reserve Tank"},
{"key":"V4", "category":"Valve", "pos":"390 60", "text":"VA"},
{"key":"V5", "category":"Valve", "pos":"450 260", "text":"VB", "angle":90}
],
"linkDataArray": [
{"from":"P1", "to":"V1"},
{"from":"P3", "to":"V2"},
{"from":"V2", "to":"P1"},
{"from":"P2", "to":"V3"},
{"from":"V3", "to":"P3"},
{"from":"V1", "to":"V4"},
{"from":"V4", "to":"P4"},
{"from":"V1", "to":"P2"},
{"from":"P4", "to":"V5"},
{"from":"V5", "to":"P2"}
]}
</textarea>
</div>
</div>
</body>
</html>