gojs
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Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
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HTML
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<meta name="description" content="Interactive flowchart diagram implemented by GoJS in JavaScript for HTML."/>
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<title>Flowchart</title>
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<body>
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<h1 class="my-0 p-1 ">GoJS</h1>
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<!-- Start of GoJS sample code -->
<script src="../release/go.js"></script>
<div id="allSampleContent" class="p-4 w-full">
<script id="code">
function init() {
if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
// Since 2.2 you can also author concise templates with method chaining instead of GraphObject.make
// For details, see https://gojs.net/latest/intro/buildingObjects.html
const $ = go.GraphObject.make; // for conciseness in defining templates
myDiagram =
new go.Diagram("myDiagramDiv", // must name or refer to the DIV HTML element
{
"LinkDrawn": showLinkLabel, // this DiagramEvent listener is defined below
"LinkRelinked": showLinkLabel,
"undoManager.isEnabled": true // enable undo & redo
});
// when the document is modified, add a "*" to the title and enable the "Save" button
myDiagram.addDiagramListener("Modified", 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.slice(0, idx);
}
});
// helper definitions for node templates
function nodeStyle() {
return [
// The Node.location comes from the "loc" property of the node data,
// converted by the Point.parse static method.
// If the Node.location is changed, it updates the "loc" property of the node data,
// converting back using the Point.stringify static method.
new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
{
// the Node.location is at the center of each node
locationSpot: go.Spot.Center
}
];
}
// Define a function for creating a "port" that is normally transparent.
// The "name" is used as the GraphObject.portId,
// the "align" is used to determine where to position the port relative to the body of the node,
// the "spot" is used to control how links connect with the port and whether the port
// stretches along the side of the node,
// and the boolean "output" and "input" arguments control whether the user can draw links from or to the port.
function makePort(name, align, spot, output, input) {
var horizontal = align.equals(go.Spot.Top) || align.equals(go.Spot.Bottom);
// the port is basically just a transparent rectangle that stretches along the side of the node,
// and becomes colored when the mouse passes over it
return $(go.Shape,
{
fill: "transparent", // changed to a color in the mouseEnter event handler
strokeWidth: 0, // no stroke
width: horizontal ? NaN : 8, // if not stretching horizontally, just 8 wide
height: !horizontal ? NaN : 8, // if not stretching vertically, just 8 tall
alignment: align, // align the port on the main Shape
stretch: (horizontal ? go.GraphObject.Horizontal : go.GraphObject.Vertical),
portId: name, // declare this object to be a "port"
fromSpot: spot, // declare where links may connect at this port
fromLinkable: output, // declare whether the user may draw links from here
toSpot: spot, // declare where links may connect at this port
toLinkable: input, // declare whether the user may draw links to here
cursor: "pointer", // show a different cursor to indicate potential link point
mouseEnter: (e, port) => { // the PORT argument will be this Shape
if (!e.diagram.isReadOnly) port.fill = "rgba(255,0,255,0.5)";
},
mouseLeave: (e, port) => port.fill = "transparent"
});
}
function textStyle() {
return {
font: "bold 11pt Lato, Helvetica, Arial, sans-serif",
stroke: "#F8F8F8"
}
}
// define the Node templates for regular nodes
myDiagram.nodeTemplateMap.add("", // the default category
$(go.Node, "Table", nodeStyle(),
// the main object is a Panel that surrounds a TextBlock with a rectangular Shape
$(go.Panel, "Auto",
$(go.Shape, "Rectangle",
{ fill: "#282c34", stroke: "#00A9C9", strokeWidth: 3.5 },
new go.Binding("figure", "figure")),
$(go.TextBlock, textStyle(),
{
margin: 8,
maxSize: new go.Size(160, NaN),
wrap: go.TextBlock.WrapFit,
editable: true
},
new go.Binding("text").makeTwoWay())
),
// four named ports, one on each side:
makePort("T", go.Spot.Top, go.Spot.TopSide, false, true),
makePort("L", go.Spot.Left, go.Spot.LeftSide, true, true),
makePort("R", go.Spot.Right, go.Spot.RightSide, true, true),
makePort("B", go.Spot.Bottom, go.Spot.BottomSide, true, false)
));
myDiagram.nodeTemplateMap.add("Conditional",
$(go.Node, "Table", nodeStyle(),
// the main object is a Panel that surrounds a TextBlock with a rectangular Shape
$(go.Panel, "Auto",
$(go.Shape, "Diamond",
{ fill: "#282c34", stroke: "#00A9C9", strokeWidth: 3.5 },
new go.Binding("figure", "figure")),
$(go.TextBlock, textStyle(),
{
margin: 8,
maxSize: new go.Size(160, NaN),
wrap: go.TextBlock.WrapFit,
editable: true
},
new go.Binding("text").makeTwoWay())
),
// four named ports, one on each side:
makePort("T", go.Spot.Top, go.Spot.Top, false, true),
makePort("L", go.Spot.Left, go.Spot.Left, true, true),
makePort("R", go.Spot.Right, go.Spot.Right, true, true),
makePort("B", go.Spot.Bottom, go.Spot.Bottom, true, false)
));
myDiagram.nodeTemplateMap.add("Start",
$(go.Node, "Table", nodeStyle(),
$(go.Panel, "Spot",
$(go.Shape, "Circle",
{ desiredSize: new go.Size(70, 70), fill: "#282c34", stroke: "#09d3ac", strokeWidth: 3.5 }),
$(go.TextBlock, "Start", textStyle(),
new go.Binding("text"))
),
// three named ports, one on each side except the top, all output only:
makePort("L", go.Spot.Left, go.Spot.Left, true, false),
makePort("R", go.Spot.Right, go.Spot.Right, true, false),
makePort("B", go.Spot.Bottom, go.Spot.Bottom, true, false)
));
myDiagram.nodeTemplateMap.add("End",
$(go.Node, "Table", nodeStyle(),
$(go.Panel, "Spot",
$(go.Shape, "Circle",
{ desiredSize: new go.Size(60, 60), fill: "#282c34", stroke: "#DC3C00", strokeWidth: 3.5 }),
$(go.TextBlock, "End", textStyle(),
new go.Binding("text"))
),
// three named ports, one on each side except the bottom, all input only:
makePort("T", go.Spot.Top, go.Spot.Top, false, true),
makePort("L", go.Spot.Left, go.Spot.Left, false, true),
makePort("R", go.Spot.Right, go.Spot.Right, false, true)
));
// taken from ../extensions/Figures.js:
go.Shape.defineFigureGenerator("File", (shape, w, h) => {
var geo = new go.Geometry();
var fig = new go.PathFigure(0, 0, true); // starting point
geo.add(fig);
fig.add(new go.PathSegment(go.PathSegment.Line, .75 * w, 0));
fig.add(new go.PathSegment(go.PathSegment.Line, w, .25 * h));
fig.add(new go.PathSegment(go.PathSegment.Line, w, h));
fig.add(new go.PathSegment(go.PathSegment.Line, 0, h).close());
var fig2 = new go.PathFigure(.75 * w, 0, false);
geo.add(fig2);
// The Fold
fig2.add(new go.PathSegment(go.PathSegment.Line, .75 * w, .25 * h));
fig2.add(new go.PathSegment(go.PathSegment.Line, w, .25 * h));
geo.spot1 = new go.Spot(0, .25);
geo.spot2 = go.Spot.BottomRight;
return geo;
});
myDiagram.nodeTemplateMap.add("Comment",
$(go.Node, "Auto", nodeStyle(),
$(go.Shape, "File",
{ fill: "#282c34", stroke: "#DEE0A3", strokeWidth: 3 }),
$(go.TextBlock, textStyle(),
{
margin: 8,
maxSize: new go.Size(200, NaN),
wrap: go.TextBlock.WrapFit,
textAlign: "center",
editable: true
},
new go.Binding("text").makeTwoWay())
// no ports, because no links are allowed to connect with a comment
));
// replace the default Link template in the linkTemplateMap
myDiagram.linkTemplate =
$(go.Link, // the whole link panel
{
routing: go.Link.AvoidsNodes,
curve: go.Link.JumpOver,
corner: 5, toShortLength: 4,
relinkableFrom: true,
relinkableTo: true,
reshapable: true,
resegmentable: true,
// mouse-overs subtly highlight links:
mouseEnter: (e, link) => link.findObject("HIGHLIGHT").stroke = "rgba(30,144,255,0.2)",
mouseLeave: (e, link) => link.findObject("HIGHLIGHT").stroke = "transparent",
selectionAdorned: false
},
new go.Binding("points").makeTwoWay(),
$(go.Shape, // the highlight shape, normally transparent
{ isPanelMain: true, strokeWidth: 8, stroke: "transparent", name: "HIGHLIGHT" }),
$(go.Shape, // the link path shape
{ isPanelMain: true, stroke: "gray", strokeWidth: 2 },
new go.Binding("stroke", "isSelected", sel => sel ? "dodgerblue" : "gray").ofObject()),
$(go.Shape, // the arrowhead
{ toArrow: "standard", strokeWidth: 0, fill: "gray" }),
$(go.Panel, "Auto", // the link label, normally not visible
{ visible: false, name: "LABEL", segmentIndex: 2, segmentFraction: 0.5 },
new go.Binding("visible", "visible").makeTwoWay(),
$(go.Shape, "RoundedRectangle", // the label shape
{ fill: "#F8F8F8", strokeWidth: 0 }),
$(go.TextBlock, "Yes", // the label
{
textAlign: "center",
font: "10pt helvetica, arial, sans-serif",
stroke: "#333333",
editable: true
},
new go.Binding("text").makeTwoWay())
)
);
// Make link labels visible if coming out of a "conditional" node.
// This listener is called by the "LinkDrawn" and "LinkRelinked" DiagramEvents.
function showLinkLabel(e) {
var label = e.subject.findObject("LABEL");
if (label !== null) label.visible = (e.subject.fromNode.data.category === "Conditional");
}
// temporary links used by LinkingTool and RelinkingTool are also orthogonal:
myDiagram.toolManager.linkingTool.temporaryLink.routing = go.Link.Orthogonal;
myDiagram.toolManager.relinkingTool.temporaryLink.routing = go.Link.Orthogonal;
load(); // load an initial diagram from some JSON text
// initialize the Palette that is on the left side of the page
myPalette =
new go.Palette("myPaletteDiv", // must name or refer to the DIV HTML element
{
// Instead of the default animation, use a custom fade-down
"animationManager.initialAnimationStyle": go.AnimationManager.None,
"InitialAnimationStarting": animateFadeDown, // Instead, animate with this function
nodeTemplateMap: myDiagram.nodeTemplateMap, // share the templates used by myDiagram
model: new go.GraphLinksModel([ // specify the contents of the Palette
{ category: "Start", text: "Start" },
{ text: "Step" },
{ category: "Conditional", text: "???" },
{ category: "End", text: "End" },
{ category: "Comment", text: "Comment" }
])
});
// This is a re-implementation of the default animation, except it fades in from downwards, instead of upwards.
function animateFadeDown(e) {
var diagram = e.diagram;
var animation = new go.Animation();
animation.isViewportUnconstrained = true; // So Diagram positioning rules let the animation start off-screen
animation.easing = go.Animation.EaseOutExpo;
animation.duration = 900;
// Fade "down", in other words, fade in from above
animation.add(diagram, 'position', diagram.position.copy().offset(0, 200), diagram.position);
animation.add(diagram, 'opacity', 0, 1);
animation.start();
}
} // end init
// Show the diagram's model in JSON format that the user may edit
function save() {
document.getElementById("mySavedModel").value = myDiagram.model.toJson();
myDiagram.isModified = false;
}
function load() {
myDiagram.model = go.Model.fromJson(document.getElementById("mySavedModel").value);
}
// print the diagram by opening a new window holding SVG images of the diagram contents for each page
function printDiagram() {
var svgWindow = window.open();
if (!svgWindow) return; // failure to open a new Window
var printSize = new go.Size(700, 960);
var bnds = myDiagram.documentBounds;
var x = bnds.x;
var y = bnds.y;
while (y < bnds.bottom) {
while (x < bnds.right) {
var svg = myDiagram.makeSvg({ scale: 1.0, position: new go.Point(x, y), size: printSize });
svgWindow.document.body.appendChild(svg);
x += printSize.width;
}
x = bnds.x;
y += printSize.height;
}
setTimeout(() => svgWindow.print(), 1);
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div style="width: 100%; display: flex; justify-content: space-between">
<div id="myPaletteDiv" style="width: 100px; margin-right: 2px; background-color: #282c34;"></div>
<div id="myDiagramDiv" style="flex-grow: 1; height: 750px; background-color: #282c34;"></div>
</div>
<p>
The FlowChart sample demonstrates several key features of GoJS,
namely <a href="../intro/palette.html">Palette</a>s,
<a href="../intro/links.html">Linkable nodes</a>, Drag/Drop behavior,
<a href="../intro/textBlocks.html">Text Editing</a>, and the use of
<a href="../intro/templateMaps.html">Node Template Maps</a> in Diagrams.
</p>
<p>
Mouse-over a Node to view its ports.
Drag from these ports to create new Links.
Selecting Links allows you to re-shape and re-link them.
Selecting a Node and then clicking its TextBlock will allow
you to edit text (except on the Start and End Nodes).
</p>
<button id="SaveButton" onclick="save()">Save</button>
<button onclick="load()">Load</button>
Diagram Model saved in JSON format:
<textarea id="mySavedModel" style="width:100%;height:300px">
{ "class": "go.GraphLinksModel",
"linkFromPortIdProperty": "fromPort",
"linkToPortIdProperty": "toPort",
"nodeDataArray": [
{"category":"Comment", "loc":"360 -10", "text":"Kookie Brittle", "key":-13},
{"key":-1, "category":"Start", "loc":"175 0", "text":"Start"},
{"key":0, "loc":"-5 75", "text":"Preheat oven to 375 F"},
{"key":1, "loc":"175 100", "text":"In a bowl, blend: 1 cup margarine, 1.5 teaspoon vanilla, 1 teaspoon salt"},
{"key":2, "loc":"175 200", "text":"Gradually beat in 1 cup sugar and 2 cups sifted flour"},
{"key":3, "loc":"175 290", "text":"Mix in 6 oz (1 cup) Nestle's Semi-Sweet Chocolate Morsels"},
{"key":4, "loc":"175 380", "text":"Press evenly into ungreased 15x10x1 pan"},
{"key":5, "loc":"355 85", "text":"Finely chop 1/2 cup of your choice of nuts"},
{"key":6, "loc":"175 450", "text":"Sprinkle nuts on top"},
{"key":7, "loc":"175 515", "text":"Bake for 25 minutes and let cool"},
{"key":8, "loc":"175 585", "text":"Cut into rectangular grid"},
{"key":-2, "category":"End", "loc":"175 660", "text":"Enjoy!"}
],
"linkDataArray": [
{"from":1, "to":2, "fromPort":"B", "toPort":"T"},
{"from":2, "to":3, "fromPort":"B", "toPort":"T"},
{"from":3, "to":4, "fromPort":"B", "toPort":"T"},
{"from":4, "to":6, "fromPort":"B", "toPort":"T"},
{"from":6, "to":7, "fromPort":"B", "toPort":"T"},
{"from":7, "to":8, "fromPort":"B", "toPort":"T"},
{"from":8, "to":-2, "fromPort":"B", "toPort":"T"},
{"from":-1, "to":0, "fromPort":"B", "toPort":"T"},
{"from":-1, "to":1, "fromPort":"B", "toPort":"T"},
{"from":-1, "to":5, "fromPort":"B", "toPort":"T"},
{"from":5, "to":4, "fromPort":"B", "toPort":"T"},
{"from":0, "to":4, "fromPort":"B", "toPort":"T"}
]}
</textarea>
<button onclick="printDiagram()">Print Diagram Using SVG</button>
</div>
<link href='https://fonts.googleapis.com/css?family=Lato:300,400,700&swap' rel='stylesheet' type='text/css'>
</div>
<!-- * * * * * * * * * * * * * -->
<!-- End of GoJS sample code -->
</div>
</body>
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</html>