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mindMap.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no, viewport-fit=cover"/>
<meta name="description" content="A mind map editor, showing how subtrees can be moved, copied, deleted, and laid out." />
<meta itemprop="description" content="A mind map editor, showing how subtrees can be moved, copied, deleted, and laid out." />
<meta property="og:description" content="A mind map editor, showing how subtrees can be moved, copied, deleted, and laid out." />
<meta name="twitter:description" content="A mind map editor, showing how subtrees can be moved, copied, deleted, and laid out." />
<link rel="preconnect" href="https://rsms.me/">
<link rel="stylesheet" href="https://rsms.me/inter/inter.css">
<link rel="stylesheet" href="../assets/css/style.css">
<!-- Copyright 1998-2024 by Northwoods Software Corporation. -->
<meta itemprop="name" content="Mind Map" />
<meta property="og:title" content="Mind Map" />
<meta name="twitter:title" content="Mind Map" />
<meta property="og:image" content="https://gojs.net/latest/assets/images/screenshots/mindMap.png" />
<meta itemprop="image" content="https://gojs.net/latest/assets/images/screenshots/mindMap.png" />
<meta name="twitter:image" content="https://gojs.net/latest/assets/images/screenshots/mindMap.png" />
<meta property="og:url" content="https://gojs.net/latest/samples/mindMap.html" />
<meta property="twitter:url" content="https://gojs.net/latest/samples/mindMap.html" />
<meta name="twitter:card" content="summary_large_image" />
<meta property="og:type" content="website" />
<meta property="twitter:domain" content="gojs.net" />
<title>
Mind Map | GoJS
</title>
</head>
<body>
<!-- This top nav is not part of the sample code -->
<nav id="navTop" class=" w-full h-[var(--topnav-h)] z-30 bg-white border-b border-b-gray-200">
<div class="max-w-screen-xl mx-auto flex flex-wrap items-start justify-between px-4">
<a class="text-white bg-nwoods-primary font-bold !leading-[calc(var(--topnav-h)_-_1px)] my-0 px-2 text-4xl lg:text-5xl logo"
href="../">
GoJS
</a>
<div class="relative">
<button id="topnavButton" class="h-[calc(var(--topnav-h)_-_1px)] px-2 m-0 text-gray-900 bg-inherit shadow-none md:hidden hover:!bg-inherit hover:!text-nwoods-accent hover:!shadow-none" aria-label="Navigation">
<svg class="h-7 w-7 block" aria-hidden="true" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
<path d="M3.75 6.75h16.5M3.75 12h16.5m-16.5 5.25h16.5" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
</button>
<div id="topnavList" class="hidden md:block">
<div class="absolute right-0 z-30 flex flex-col items-end rounded border border-gray-200 p-4 pl-12 shadow bg-white text-gray-900 font-semibold
md:flex-row md:space-x-4 md:items-start md:border-0 md:p-0 md:shadow-none md:bg-inherit">
<a href="../learn/">Learn</a>
<a href="../samples/">Samples</a>
<a href="../intro/">Intro</a>
<a href="../api/">API</a>
<a href="../download.html">Download</a>
<a href="https://forum.nwoods.com/c/gojs/11" target="_blank" rel="noopener">Forum</a>
<a id="tc" href="https://nwoods.com/contact.html"
target="_blank" rel="noopener" onclick="getOutboundLink('https://nwoods.com/contact.html', 'contact');">Contact</a>
<a id="tb" href="https://nwoods.com/sales/index.html"
target="_blank" rel="noopener" onclick="getOutboundLink('https://nwoods.com/sales/index.html', 'buy');">Buy</a>
</div>
</div>
</div>
</div>
</nav>
<script>
window.addEventListener("DOMContentLoaded", function () {
// topnav
var topButton = document.getElementById("topnavButton");
var topnavList = document.getElementById("topnavList");
if (topButton && topnavList) {
topButton.addEventListener("click", function (e) {
topnavList
.classList
.toggle("hidden");
e.stopPropagation();
});
document.addEventListener("click", function (e) {
// if the clicked element isn't the list, close the list
if (!topnavList.classList.contains("hidden") && !e.target.closest("#topnavList")) {
topButton.click();
}
});
// set active <a> element
var url = window
.location
.href
.toLowerCase();
var aTags = topnavList.getElementsByTagName('a');
for (var i = 0; i < aTags.length; i++) {
var lowerhref = aTags[i]
.href
.toLowerCase();
if (url.startsWith(lowerhref)) {
aTags[i]
.classList
.add('active');
break;
}
}
}
});
</script>
<div class="flex flex-col prose">
<div class="w-full max-w-screen-xl mx-auto">
<!-- * * * * * * * * * * * * * -->
<!-- Start of GoJS sample code -->
<script src="../release/go.js"></script>
<div id="allSampleContent" class="p-4 w-full">
<script id="code">
function init() {
// 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;
myDiagram = new go.Diagram('myDiagramDiv', {
// when the user drags a node, also move/copy/delete the whole subtree starting with that node
'commandHandler.copiesTree': true,
'commandHandler.copiesParentKey': true,
'commandHandler.deletesTree': true,
'draggingTool.dragsTree': true,
'undoManager.isEnabled': true,
});
// 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);
}
});
// a node consists of some text with a line shape underneath
myDiagram.nodeTemplate = $(go.Node,
'Vertical',
{ selectionObjectName: 'TEXT' },
$(go.TextBlock,
{
name: 'TEXT',
minSize: new go.Size(30, 15),
editable: true,
},
// remember not only the text string but the scale and the font in the node data
new go.Binding('text', 'text').makeTwoWay(),
new go.Binding('scale', 'scale').makeTwoWay(),
new go.Binding('font', 'font').makeTwoWay()
),
$(go.Shape,
'LineH',
{
stretch: go.Stretch.Horizontal,
strokeWidth: 3,
height: 3,
// this line shape is the port -- what links connect with
portId: '',
fromSpot: go.Spot.LeftRightSides,
toSpot: go.Spot.LeftRightSides,
},
new go.Binding('stroke', 'brush'),
// make sure links come in from the proper direction and go out appropriately
new go.Binding('fromSpot', 'dir', (d) => spotConverter(d, true)),
new go.Binding('toSpot', 'dir', (d) => spotConverter(d, false))
),
// remember the locations of each node in the node data
new go.Binding('location', 'loc', go.Point.parse).makeTwoWay(go.Point.stringify),
// make sure text "grows" in the desired direction
new go.Binding('locationSpot', 'dir', (d) => spotConverter(d, false))
);
// selected nodes show a button for adding children
myDiagram.nodeTemplate.selectionAdornmentTemplate = $(go.Adornment,
'Spot',
$(go.Panel,
'Auto',
// this Adornment has a rectangular blue Shape around the selected node
$(go.Shape, { fill: null, stroke: 'dodgerblue', strokeWidth: 3 }),
$(go.Placeholder, { margin: new go.Margin(4, 4, 0, 4) })
),
// and this Adornment has a Button to the right of the selected node
$('Button',
{
alignment: go.Spot.Right,
alignmentFocus: go.Spot.Left,
click: addNodeAndLink, // define click behavior for this Button in the Adornment
},
$(go.TextBlock,
'+', // the Button content
{ font: 'bold 8pt sans-serif' }
)
)
);
// the context menu allows users to change the font size and weight,
// and to perform a limited tree layout starting at that node
myDiagram.nodeTemplate.contextMenu = $('ContextMenu',
$('ContextMenuButton', $(go.TextBlock, 'Bigger'), { click: (e, obj) => changeTextSize(obj, 1.1) }),
$('ContextMenuButton', $(go.TextBlock, 'Smaller'), { click: (e, obj) => changeTextSize(obj, 1 / 1.1) }),
$('ContextMenuButton', $(go.TextBlock, 'Bold/Normal'), { click: (e, obj) => toggleTextWeight(obj) }),
$('ContextMenuButton', $(go.TextBlock, 'Copy'), { click: (e, obj) => e.diagram.commandHandler.copySelection() }),
$('ContextMenuButton', $(go.TextBlock, 'Delete'), { click: (e, obj) => e.diagram.commandHandler.deleteSelection() }),
$('ContextMenuButton', $(go.TextBlock, 'Undo'), { click: (e, obj) => e.diagram.commandHandler.undo() }),
$('ContextMenuButton', $(go.TextBlock, 'Redo'), { click: (e, obj) => e.diagram.commandHandler.redo() }),
$('ContextMenuButton', $(go.TextBlock, 'Layout'), {
click: (e, obj) => {
var adorn = obj.part;
adorn.diagram.startTransaction('Subtree Layout');
layoutTree(adorn.adornedPart);
adorn.diagram.commitTransaction('Subtree Layout');
},
})
);
// a link is just a Bezier-curved line of the same color as the node to which it is connected
myDiagram.linkTemplate = $(go.Link,
{
curve: go.Curve.Bezier,
fromShortLength: -2,
toShortLength: -2,
selectable: false,
},
$(go.Shape,
{ strokeWidth: 3 },
new go.Binding('stroke', 'toNode', (n) => {
if (n.data.brush) return n.data.brush;
return 'black';
}).ofObject()
)
);
// the Diagram's context menu just displays commands for general functionality
myDiagram.contextMenu = $('ContextMenu',
$('ContextMenuButton',
$(go.TextBlock, 'Paste'),
{ click: (e, obj) => e.diagram.commandHandler.pasteSelection(e.diagram.toolManager.contextMenuTool.mouseDownPoint) },
new go.Binding(
'visible',
'',
(o) => o.diagram && o.diagram.commandHandler.canPasteSelection(o.diagram.toolManager.contextMenuTool.mouseDownPoint)
).ofObject()
),
$('ContextMenuButton',
$(go.TextBlock, 'Undo'),
{ click: (e, obj) => e.diagram.commandHandler.undo() },
new go.Binding('visible', '', (o) => o.diagram && o.diagram.commandHandler.canUndo()).ofObject()
),
$('ContextMenuButton',
$(go.TextBlock, 'Redo'),
{ click: (e, obj) => e.diagram.commandHandler.redo() },
new go.Binding('visible', '', (o) => o.diagram && o.diagram.commandHandler.canRedo()).ofObject()
),
$('ContextMenuButton', $(go.TextBlock, 'Save'), { click: (e, obj) => save() }),
$('ContextMenuButton', $(go.TextBlock, 'Load'), { click: (e, obj) => load() })
);
myDiagram.addDiagramListener('SelectionMoved', (e) => {
var rootX = myDiagram.findNodeForKey(0).location.x;
myDiagram.selection.each((node) => {
if (node.data.parent !== 0) return; // Only consider nodes connected to the root
var nodeX = node.location.x;
if (rootX < nodeX && node.data.dir !== 'right') {
updateNodeDirection(node, 'right');
} else if (rootX > nodeX && node.data.dir !== 'left') {
updateNodeDirection(node, 'left');
}
layoutTree(node);
});
});
// read in the predefined graph using the JSON format data held in the "mySavedModel" textarea
load();
}
function spotConverter(dir, from) {
if (dir === 'left') {
return from ? go.Spot.Left : go.Spot.Right;
} else {
return from ? go.Spot.Right : go.Spot.Left;
}
}
function changeTextSize(obj, factor) {
var adorn = obj.part;
adorn.diagram.startTransaction('Change Text Size');
var node = adorn.adornedPart;
var tb = node.findObject('TEXT');
tb.scale *= factor;
adorn.diagram.commitTransaction('Change Text Size');
}
function toggleTextWeight(obj) {
var adorn = obj.part;
adorn.diagram.startTransaction('Change Text Weight');
var node = adorn.adornedPart;
var tb = node.findObject('TEXT');
// assume "bold" is at the start of the font specifier
var idx = tb.font.indexOf('bold');
if (idx < 0) {
tb.font = 'bold ' + tb.font;
} else {
tb.font = tb.font.slice(idx + 5);
}
adorn.diagram.commitTransaction('Change Text Weight');
}
function updateNodeDirection(node, dir) {
myDiagram.model.setDataProperty(node.data, 'dir', dir);
// recursively update the direction of the child nodes
var chl = node.findTreeChildrenNodes(); // gives us an iterator of the child nodes related to this particular node
while (chl.next()) {
updateNodeDirection(chl.value, dir);
}
}
function addNodeAndLink(e, obj) {
var adorn = obj.part;
var diagram = adorn.diagram;
diagram.startTransaction('Add Node');
var oldnode = adorn.adornedPart;
var olddata = oldnode.data;
// copy the brush and direction to the new node data
var newdata = { text: 'idea', brush: olddata.brush, dir: olddata.dir, parent: olddata.key };
diagram.model.addNodeData(newdata);
layoutTree(oldnode);
diagram.commitTransaction('Add Node');
// if the new node is off-screen, scroll the diagram to show the new node
var newnode = diagram.findNodeForData(newdata);
if (newnode !== null) diagram.scrollToRect(newnode.actualBounds);
}
function layoutTree(node) {
if (node.isTreeRoot) { // is this a root node?
// adding to the root?
layoutAll(); // lay out everything
} else {
// otherwise lay out only the subtree starting at this parent node
var parts = node.findTreeParts();
layoutAngle(parts, node.data.dir === 'left' ? 180 : 0);
}
}
function layoutAngle(parts, angle) {
var layout = new go.TreeLayout({
angle: angle,
arrangement: go.TreeArrangement.FixedRoots,
nodeSpacing: 5,
layerSpacing: 20,
setsPortSpot: false, // don't set port spots since we're managing them with our spotConverter function
setsChildPortSpot: false,
});
layout.doLayout(parts);
}
function layoutAll() {
var root = myDiagram.findTreeRoots().first();
if (root === null) return;
myDiagram.startTransaction('Layout');
// split the nodes and links into two collections
var rightward = new go.Set(/*go.Part*/);
var leftward = new go.Set(/*go.Part*/);
root.findLinksConnected().each((link) => {
var child = link.toNode;
if (child.data.dir === 'left') {
leftward.add(root); // the root node is in both collections
leftward.add(link);
leftward.addAll(child.findTreeParts());
} else {
rightward.add(root); // the root node is in both collections
rightward.add(link);
rightward.addAll(child.findTreeParts());
}
});
// do one layout and then the other without moving the shared root node
layoutAngle(rightward, 0);
layoutAngle(leftward, 180);
myDiagram.commitTransaction('Layout');
}
// Show the diagram's model in JSON format
function save() {
document.getElementById('mySavedModel').value = myDiagram.model.toJson();
myDiagram.isModified = false;
}
function load() {
myDiagram.model = go.Model.fromJson(document.getElementById('mySavedModel').value);
// if any nodes don't have locations assigned from the model, force a layout of everything
if (myDiagram.nodes.any(n => !n.location.isReal())) layoutAll();
}
window.addEventListener('DOMContentLoaded', init);
</script>
<div id="sample">
<div id="myDiagramDiv" style="border: solid 1px black; width: 100%; height: 300px"></div>
<p>A mind map is a kind of spider diagram that organizes information around a central concept, with connecting branches.</p>
<p>
The layout is controlled by moving the nodes closest to the tree's root node. When one of these nodes is moved horizontally to the other side of the root,
all of its children will be sent to <a>Layout.doLayout</a> with a new direction, causing text to always be moved outwards from the root. The
<b>spotConverter</b> function is used to manage <a>GraphObject.fromSpot</a> and <a>GraphObject.toSpot</a> for nodes manually, so the
<a>TreeLayout.setsPortSpot</a> and <a>TreeLayout.setsChildPortSpot</a>
properties are set to false so that laying out the diagram will not overwrite the values.
</p>
<p>
When a node is deleted the <a>CommandHandler.deletesTree</a> property ensures that all of its children are deleted with it. When a node is dragged the
<a>DraggingTool.dragsTree</a>
property ensures that all its children are dragged with it. Both of these are set during the the Diagram's initalization.
</p>
<p>
Node templates also have a <a>Part.selectionAdornmentTemplate</a> defined to allow for new nodes to be created and a <a>GraphObject.contextMenu</a> with
additional commands.
</p>
<button id="SaveButton" onclick="save()">Save</button>
<button onclick="load()">Load</button>
<button onclick="layoutAll()">Layout</button>
Diagram Model saved in JSON format:
<br />
<textarea id="mySavedModel" style="width: 100%; height: 400px">
{ "class": "go.TreeModel",
"nodeDataArray": [
{"key":0, "text":"Mind Map", "loc":"0 0"},
{"key":1, "parent":0, "text":"Getting more time", "brush":"skyblue", "dir":"right"},
{"key":11, "parent":1, "text":"Wake up early", "brush":"skyblue", "dir":"right"},
{"key":12, "parent":1, "text":"Delegate", "brush":"skyblue", "dir":"right"},
{"key":13, "parent":1, "text":"Simplify", "brush":"skyblue", "dir":"right"},
{"key":2, "parent":0, "text":"More effective use", "brush":"darkseagreen", "dir":"right"},
{"key":21, "parent":2, "text":"Planning", "brush":"darkseagreen", "dir":"right"},
{"key":211, "parent":21, "text":"Priorities", "brush":"darkseagreen", "dir":"right"},
{"key":212, "parent":21, "text":"Ways to focus", "brush":"darkseagreen", "dir":"right"},
{"key":22, "parent":2, "text":"Goals", "brush":"darkseagreen", "dir":"right"},
{"key":3, "parent":0, "text":"Time wasting", "brush":"palevioletred", "dir":"left"},
{"key":31, "parent":3, "text":"Too many meetings", "brush":"palevioletred", "dir":"left"},
{"key":32, "parent":3, "text":"Too much time spent on details", "brush":"palevioletred", "dir":"left"},
{"key":33, "parent":3, "text":"Message fatigue", "brush":"palevioletred", "dir":"left"},
{"key":331, "parent":31, "text":"Check messages less", "brush":"palevioletred", "dir":"left"},
{"key":332, "parent":31, "text":"Message filters", "brush":"palevioletred", "dir":"left"},
{"key":4, "parent":0, "text":"Key issues", "brush":"coral", "dir":"left"},
{"key":41, "parent":4, "text":"Methods", "brush":"coral", "dir":"left"},
{"key":42, "parent":4, "text":"Deadlines", "brush":"coral", "dir":"left"},
{"key":43, "parent":4, "text":"Checkpoints", "brush":"coral", "dir":"left"}
]
}
</textarea>
</div>
</div>
<!-- * * * * * * * * * * * * * -->
<!-- End of GoJS sample code -->
</div>
<div id="allTagDescriptions" class="p-4 w-full max-w-screen-xl mx-auto">
<hr/>
<h3 class="text-xl">GoJS Features in this sample</h3>
<!-- blacklist tags that do not correspond to a specific GoJS feature -->
<h4>Collections</h4>
<p>
<b>GoJS</b> provides its own collection classes: <a href="../api/symbols/List.html" target="api">List</a>, <a href="../api/symbols/Set.html" target="api">Set</a>, and <a href="../api/symbols/Map.html" target="api">Map</a>.
You can iterate over a collection by using an <a href="../api/symbols/Iterator.html" target="api">Iterator</a>.
More information can be found in the <a href="../intro/collections.html">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#collections">Related samples</a>
</p>
<hr>
<!-- blacklist tags that do not correspond to a specific GoJS feature -->
<h4>Tree Layout</h4>
<p>
This predefined layout is used for placing Nodes of a tree-structured graph in layers (rows or columns).
For discussion and examples of the most commonly used properties of the <a href="../api/symbols/TreeLayout.html">TreeLayout</a>,
see the <a href="../intro/trees.html">Trees</a> page in the Introduction.
More information can be found in the <a href="../intro/layouts.html#TreeLayout">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#treelayout">Related samples</a>
</p>
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<h4>Context Menus</h4>
<p>
A GoJS context menu is an <a href="../api/symbols/Adornment.html" target="api">Adornment</a> that is shown when the user context-clicks (right mouse click or long touch hold)
an object that has its <a href="../api/symbols/GraphObject.html#contextMenu" target="api">GraphObject.contextMenu</a> set.
The context menu is bound to the same data as the part itself.
</p>
<p>
It is typical to implement a context menu as a "ContextMenu" Panel containing "ContextMenuButton"s,
as you can see in the code below in the assignment of the Node's <a href="../api/symbols/GraphObject.html#contextMenu" target="api">GraphObject.contextMenu</a> and <a href="../api/symbols/Diagram.html#contextMenu" target="api">Diagram.contextMenu</a> properties.
Each "ContextMenu" is just a "Vertical" Panel <a href="../api/symbols/Adornment.html" target="api">Adornment</a> that is shadowed.
Each "ContextMenuButton" is a Panel on which you can set the <a href="../api/symbols/GraphObject.html#click" target="api">GraphObject.click</a> event handler.
In the event handler <code>obj.part</code> will be the whole context menu Adornment.
<code>obj.part.adornedPart</code> will be the adorned Node or Link.
The bound data is <code>obj.part.data</code>, which will be the same as <code>obj.part.adornedPart.data</code>.
</p>
<p>
More information can be found in the <a href="../intro/contextmenus.html">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#contextmenus">Related samples</a>
</p>
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<h4>Buttons</h4>
<p>
GoJS defines several <a href="../api/symbols/Panel.html" target="api">Panel</a>s for common uses.
These include "Button", "TreeExpanderButton", "SubGraphExpanderButton", "PanelExpanderButton", "ContextMenuButton", and "CheckBoxButton".
"ContextMenuButton"s are typically used inside of "ContextMenu" Panels;
"CheckBoxButton"s are used in the implementation of "CheckBox" Panels.
</p>
<p>
These predefined panels can be used as if they were <a href="../api/symbols/Panel.html" target="api">Panel</a>-derived classes in calls to <a href="../api/symbols/GraphObject.html#make" target="api">GraphObject.make</a>.
They are implemented as simple visual trees of <a href="../api/symbols/GraphObject.html" target="api">GraphObject</a>s in <a href="../api/symbols/Panel.html" target="api">Panel</a>s,
with pre-set properties and event handlers.
</p>
<p>
More information can be found in the <a href="../intro/buttons.html">GoJS Intro</a>.
</p>
<p>
<a href="../samples/index.html#buttons">Related samples</a>
</p>
<hr>
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