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entityRelationship.html
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<!DOCTYPE html>
<html>
<head>
<title>Entity Relationship</title>
<meta name="description" content="Interactive entity-relationship diagram or data model diagram implemented by GoJS in JavaScript for HTML." />
<!-- Copyright 1998-2016 by Northwoods Software Corporation. -->
<meta charset="UTF-8">
<script src="https://cdnjs.cloudflare.com/ajax/libs/gojs/1.6.7/go.js"></script>
<link href="../assets/css/goSamples.css" rel="stylesheet" type="text/css" />
<!-- you don't need to use this -->
<script src="goSamples.js"></script>
<!-- this is only for the GoJS Samples framework -->
<script id="code">
function init() {
if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
var $ = go.GraphObject.make; // for conciseness in defining templates
myDiagram =
$(go.Diagram, "myDiagramDiv", // must name or refer to the DIV HTML element
{
initialContentAlignment: go.Spot.Center,
allowDelete: false,
allowCopy: false,
layout: $(go.ForceDirectedLayout),
"undoManager.isEnabled": true
});
// define several shared Brushes
var bluegrad = $(go.Brush, "Linear", {
0: "rgb(150, 150, 250)",
0.5: "rgb(86, 86, 186)",
1: "rgb(86, 86, 186)"
});
var greengrad = $(go.Brush, "Linear", {
0: "rgb(158, 209, 159)",
1: "rgb(67, 101, 56)"
});
var redgrad = $(go.Brush, "Linear", {
0: "rgb(206, 106, 100)",
1: "rgb(180, 56, 50)"
});
var yellowgrad = $(go.Brush, "Linear", {
0: "rgb(254, 221, 50)",
1: "rgb(254, 182, 50)"
});
var lightgrad = $(go.Brush, "Linear", {
1: "#E6E6FA",
0: "#FFFAF0"
});
// the template for each attribute in a node's array of item data
var itemTempl =
$(go.Panel, "Horizontal",
$(go.Shape, {
desiredSize: new go.Size(10, 10)
},
new go.Binding("figure", "figure"),
new go.Binding("fill", "color")),
$(go.TextBlock, {
stroke: "#333333",
font: "bold 14px sans-serif"
},
new go.Binding("text", "name"))
);
// define the Node template, representing an entity
myDiagram.nodeTemplate =
$(go.Node, "Auto", // the whole node panel
{
selectionAdorned: true,
resizable: true,
layoutConditions: go.Part.LayoutStandard & ~go.Part.LayoutNodeSized,
fromSpot: go.Spot.AllSides,
toSpot: go.Spot.AllSides,
isShadowed: true,
shadowColor: "#C5C1AA"
},
new go.Binding("location", "location").makeTwoWay(),
// define the node's outer shape, which will surround the Table
$(go.Shape, "Rectangle", {
fill: lightgrad,
stroke: "#756875",
strokeWidth: 3
}),
$(go.Panel, "Table", {
margin: 8,
stretch: go.GraphObject.Fill
},
$(go.RowColumnDefinition, {
row: 0,
sizing: go.RowColumnDefinition.None
}),
// the table header
$(go.TextBlock, {
row: 0,
alignment: go.Spot.Center,
margin: new go.Margin(0, 14, 0, 2), // leave room for Button
font: "bold 16px sans-serif"
},
new go.Binding("text", "key")),
// the collapse/expand button
$("PanelExpanderButton", "LIST", // the name of the element whose visibility this button toggles
{
row: 0,
alignment: go.Spot.TopRight
}),
// the list of Panels, each showing an attribute
$(go.Panel, "Vertical", {
name: "LIST",
row: 1,
padding: 3,
alignment: go.Spot.TopLeft,
defaultAlignment: go.Spot.Left,
stretch: go.GraphObject.Horizontal,
itemTemplate: itemTempl
},
new go.Binding("itemArray", "items"))
) // end Table Panel
); // end Node
// define the Link template, representing a relationship
myDiagram.linkTemplate =
$(go.Link, // the whole link panel
{
selectionAdorned: true,
layerName: "Foreground",
reshapable: true,
routing: go.Link.AvoidsNodes,
corner: 5,
curve: go.Link.JumpOver
},
$(go.Shape, // the link shape
{
stroke: "#303B45",
strokeWidth: 2.5
}),
$(go.TextBlock, // the "from" label
{
textAlign: "center",
font: "bold 14px sans-serif",
stroke: "#1967B3",
segmentIndex: 0,
segmentOffset: new go.Point(NaN, NaN),
segmentOrientation: go.Link.OrientUpright
},
new go.Binding("text", "text")),
$(go.TextBlock, // the "to" label
{
textAlign: "center",
font: "bold 14px sans-serif",
stroke: "#1967B3",
segmentIndex: -1,
segmentOffset: new go.Point(NaN, NaN),
segmentOrientation: go.Link.OrientUpright
},
new go.Binding("text", "toText"))
);
// create the model for the E-R diagram
var nodeDataArray = [{
key: "Products",
items: [{
name: "ProductID",
iskey: true,
figure: "Decision",
color: yellowgrad
},
{
name: "ProductName",
iskey: false,
figure: "Cube1",
color: bluegrad
},
{
name: "SupplierID",
iskey: false,
figure: "Decision",
color: "purple"
},
{
name: "CategoryID",
iskey: false,
figure: "Decision",
color: "purple"
}
]
},
{
key: "Suppliers",
items: [{
name: "SupplierID",
iskey: true,
figure: "Decision",
color: yellowgrad
},
{
name: "CompanyName",
iskey: false,
figure: "Cube1",
color: bluegrad
},
{
name: "ContactName",
iskey: false,
figure: "Cube1",
color: bluegrad
},
{
name: "Address",
iskey: false,
figure: "Cube1",
color: bluegrad
}
]
},
{
key: "Categories",
items: [{
name: "CategoryID",
iskey: true,
figure: "Decision",
color: yellowgrad
},
{
name: "CategoryName",
iskey: false,
figure: "Cube1",
color: bluegrad
},
{
name: "Description",
iskey: false,
figure: "Cube1",
color: bluegrad
},
{
name: "Picture",
iskey: false,
figure: "TriangleUp",
color: redgrad
}
]
},
{
key: "Order Details",
items: [{
name: "OrderID",
iskey: true,
figure: "Decision",
color: yellowgrad
},
{
name: "ProductID",
iskey: true,
figure: "Decision",
color: yellowgrad
},
{
name: "UnitPrice",
iskey: false,
figure: "MagneticData",
color: greengrad
},
{
name: "Quantity",
iskey: false,
figure: "MagneticData",
color: greengrad
},
{
name: "Discount",
iskey: false,
figure: "MagneticData",
color: greengrad
}
]
},
];
var linkDataArray = [{
from: "Products",
to: "Suppliers",
text: "0..N",
toText: "1"
},
{
from: "Products",
to: "Categories",
text: "0..N",
toText: "1"
},
{
from: "Order Details",
to: "Products",
text: "0..N",
toText: "1"
}
];
myDiagram.model = new go.GraphLinksModel(nodeDataArray, linkDataArray);
}
</script>
</head>
<body onload="init()">
<div id="sample">
<h3>GoJS Entity Relationship</h3>
<div id="myDiagramDiv" style="background-color: white; border: solid 1px black; width: 100%; height: 700px"></div>
<p>Sample for representing the relationship between various entities. Try dragging the nodes -- their links will avoid other nodes, by virtue of the <a>Link.AvoidsNodes</a> property assigned to the custom link template's <a>Link.routing</a>. Also
note the use of <a href="../intro/buttons.html" target="_blank">Panel Expander Buttons</a> to allow for expandable/collapsible node data.
</p>
<p>Buttons are defined in <a href="../extensions/Buttons.js">Buttons.js</a>.</p>
</div>
</body>
</html>