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>Double Tree</title>
<meta name="description" content="Layout of two trees in opposite directions, assuming a single root, using TreeLayout." />
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
<script src="../release/go.js"></script>
<script src="../extensions/DoubleTreeLayout.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 in this function
myDiagram =
$(go.Diagram, "myDiagramDiv",
{
layout: $(DoubleTreeLayout,
{
//vertical: true, // default directions are horizontal
// choose whether this subtree is growing towards the right or towards the left:
directionFunction: function(n) { return n.data && n.data.dir !== "left"; }
// controlling the parameters of each TreeLayout:
//bottomRightOptions: { nodeSpacing: 0, layerSpacing: 20 },
//topLeftOptions: { alignment: go.TreeLayout.AlignmentStart },
})
});
// define all of the gradient brushes
var graygrad = $(go.Brush, "Linear", { 0: "#F5F5F5", 1: "#F1F1F1" });
var bluegrad = $(go.Brush, "Linear", { 0: "#CDDAF0", 1: "#91ADDD" });
var yellowgrad = $(go.Brush, "Linear", { 0: "#FEC901", 1: "#FEA200" });
var lavgrad = $(go.Brush, "Linear", { 0: "#EF9EFA", 1: "#A570AD" });
myDiagram.nodeTemplate =
$(go.Node, "Auto",
{ isShadowed: true },
// define the node's outer shape
$(go.Shape, "RoundedRectangle",
{ fill: graygrad, stroke: "#D8D8D8" }, // default fill is gray
new go.Binding("fill", "color")),
// define the node's text
$(go.TextBlock,
{ margin: 5, font: "bold 11px Helvetica, bold Arial, sans-serif" },
new go.Binding("text", "key"))
);
myDiagram.linkTemplate =
$(go.Link, // the whole link panel
{ selectable: false },
$(go.Shape)); // the link shape
// create the model for the double tree; could be eiher TreeModel or GraphLinksModel
myDiagram.model = new go.TreeModel([
{ key: "Root", color: lavgrad },
{ key: "Left1", parent: "Root", dir: "left", color: bluegrad },
{ key: "leaf1", parent: "Left1" },
{ key: "leaf2", parent: "Left1" },
{ key: "Left2", parent: "Left1", color: bluegrad },
{ key: "leaf3", parent: "Left2" },
{ key: "leaf4", parent: "Left2" },
{ key: "leaf5", parent: "Left1" },
{ key: "Right1", parent: "Root", dir: "right", color: yellowgrad },
{ key: "Right2", parent: "Right1", color: yellowgrad },
{ key: "leaf11", parent: "Right2" },
{ key: "leaf12", parent: "Right2" },
{ key: "leaf13", parent: "Right2" },
{ key: "leaf14", parent: "Right1" },
{ key: "leaf15", parent: "Right1" },
{ key: "Right3", parent: "Root", dir: "right", color: yellowgrad },
{ key: "leaf16", parent: "Right3" },
{ key: "leaf17", parent: "Right3" }
]);
}
</script>
</head>
<body onload="init()">
<div id="sample">
<div id="myDiagramDiv" style="background-color: white; border: solid 1px black; width: 100%; height: 500px"></div>
<p>
This sample displays a diagram of two trees sharing a single root node growing in opposite directions.
The immediate child data of the ROOT node have a "dir" property
that describes the direction that subtree should grow.
</p>
<p>
The <a>Diagram.layout</a> is an instance of the <a>DoubleTreeLayout</a> extension layout,
defined in <a href="../extensions/DoubleTreeLayout.js">extensions/DoubleTreeLayout.js</a>.
The layout requires a <a>DoubleTreeLayout.directionFunction</a> predicate to decide for a child node
of the root node which way the subtree should grow.
</p>
</div>
</body>
</html>