gojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
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HTML
<html>
<head>
<meta charset="UTF-8">
<title>Entity Relationship</title>
<meta name="description" content="Interactive entity-relationship diagram or data model diagram implemented by GoJS in JavaScript for HTML." />
<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 conciseness in defining templates
myDiagram =
$(go.Diagram, "myDiagramDiv", // must name or refer to the DIV HTML element
{
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(),
// whenever the PanelExpanderButton changes the visible property of the "LIST" panel,
// clear out any desiredSize set by the ResizingTool.
new go.Binding("desiredSize", "visible", function(v) { return new go.Size(NaN, NaN); }).ofObject("LIST"),
// 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 = $(go.GraphLinksModel,
{
copiesArrays: true,
copiesArrayObjects: true,
nodeDataArray: nodeDataArray,
linkDataArray: linkDataArray
});
}
</script>
</head>
<body onload="init()">
<div id="sample">
<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>