In the TreeMap widget, hierarchical data is represented by a set of nested rectangles whose sizes are proportional to the visualized values. TreeMap operates with plain and hierarchical data sources. Also, it can visualize a hierarchy reconstructed from a flat data source.

TreeMap provides three layout algorithms out-of-the-box along with the capability to implement your own algorithm. In addition, the widget includes API methods that enable you to implement the drill down feature. Moreover, TreeMap supports all interactive features available in other DevExtreme Data Visualization Widgets: click, hover and selection.

DevExtreme widgets are integrated with many popular libraries and frameworks. See the Installation section (for JavaScript libraries) or the Prerequisites and Installation section (for ASP.NET MVC framework) to find details on setting up DevExtreme with a particular library or framework.

The following code shows how to create the TreeMap widget using every supported library and framework. For more details on working with widgets in these libraries and frameworks, see the Widget Basics topic for jQuery, Angular, AngularJS, Knockout or ASP.NET MVC.

jQuery

JavaScript

HTML

var fruitsVegetables = [{
    name: 'Fruits',
    items: [
        { name: 'Apples', value: 4 },
        { name: 'Oranges', value: 10 },
        { name: 'Lemons', value: 6 }
    ]
}, {
    name: 'Vegetables',
    items: [
        { name: 'Cucumbers', value: 4 },
        { name: 'Tomatoes', value: 8 },
        { name: 'Turnips', value: 7 }
    ]
}];
$(function() {
    $("#treeMap").dxTreeMap({
        dataSource: fruitsVegetables
    });
});

<div id="treeMap"></div>

Angular

HTML

TypeScript

<dx-tree-map [dataSource]="fruitsVegetables"></dx-tree-map>

export class AppComponent {
    fruitsVegetables = [
        // ...   
    ];
}

AngularJS

HTML

JavaScript

<div ng-controller="DemoController">
    <div dx-tree-map="{
        dataSource: fruitsVegetables
    }"></div>
</div>

angular.module('DemoApp', ['dx'])
    .controller("DemoController", function ($scope) {
        $scope.fruitsVegetables = [
            // ...   
        ];
    });

Knockout

HTML

JavaScript

<div data-bind="dxTreeMap: {
    dataSource: fruitsVegetables
}"></div>

var viewModel = {
    fruitsVegetables: [
        // ...
    ]
};
ko.applyBindings(viewModel);

ASP.NET MVC Controls

Razor C#

Razor VB

@(Html.DevExtreme().TreeMap()
    .ID("treeMap")
    .DataSource(FruitsVegetables)
)

@(Html.DevExtreme().TreeMap() _
    .ID("treeMap") _
    .DataSource(FruitsVegetables)
)

View Demo Watch Video

Configuration

This section describes properties that configure the contents, behavior and appearance of the TreeMap widget.

Name	Description
childrenField	Specifies the name of the data source field that provides nested items for a group. Applies to hierarchical data sources only.
colorField	Specifies the name of the data source field that provides colors for tiles.
colorizer	Manages the color settings.
dataSource	Specifies the origin of data for the widget.
elementAttr	Specifies the attributes to be attached to the widget's root element.
export	Configures the exporting and printing features.
group	Configures groups.
hoverEnabled	Specifies whether tiles and groups change their style when a user pauses on them.
idField	Specifies the name of the data source field that provides IDs for items. Applies to plain data sources only.
interactWithGroup	Specifies whether the user will interact with a single tile or its group.
labelField	Specifies the name of the data source field that provides texts for tile and group labels.
layoutAlgorithm	Specifies the layout algorithm.
layoutDirection	Specifies the direction in which the items will be laid out.
loadingIndicator	Configures the loading indicator.
maxDepth	Specifies how many hierarchical levels must be visualized.
onClick	A handler for the click event.
onDisposing	A handler for the disposing event. Executed when the widget is removed from the DOM using the remove(), empty(), or html() jQuery methods only.
onDrawn	A function that is executed when the widget's rendering has finished.
onDrill	A handler for the drill event.
onExported	A handler for the exported event. Executed after data from the widget is exported.
onExporting	A handler for the exporting event. Executed before data from the widget is exported.
onFileSaving	A handler for the fileSaving event. Executed before a file with exported data is saved on the user's local storage.
onHoverChanged	A handler for the hoverChanged event.
onIncidentOccurred	A handler for the incidentOccurred event. Executed when an error or warning appears in the widget.
onInitialized	A handler for the initialized event. Executed only once, after the widget is initialized.
onNodesInitialized	A handler for the nodesInitialized event.
onNodesRendering	A handler for the nodesRendering event.
onOptionChanged	A handler for the optionChanged event. Executed after an option of the widget is changed.
onSelectionChanged	A handler for the selectionChanged event.
parentField	Specifies the name of the data source field that provides parent IDs for items. Applies to plain data sources only.
pathModified	Notifies the widget that it is embedded into an HTML page that uses a tag modifying the path.
redrawOnResize	Specifies whether to redraw the widget when the size of the parent browser window changes or a mobile device rotates.
resolveLabelOverflow	Decides whether those labels that overflow their tile/group should be hidden or truncated with ellipsis.
rtlEnabled	Switches the widget to a right-to-left representation.
selectionMode	Specifies whether a single or multiple nodes can be in the selected state simultaneously.
size	Specifies the widget's size in pixels.
theme	Sets the name of the theme the widget uses.
tile	Configures tiles.
title	Configures the widget's title.
tooltip	Configures tooltips - small pop-up rectangles that display information about a data-visualizing widget element being pressed or hovered over with the mouse pointer.
valueField	Specifies the name of the data source field that provides values for tiles.

Methods

This section describes methods that can be called to manipulate the TreeMap widget.

Name	Description
beginUpdate()	Prevents the widget from refreshing until the endUpdate() method is called.
clearSelection()	Deselects all nodes in the widget.
dispose()	Disposes of all the resources allocated to the TreeMap instance.
drillUp()	Drills one level up.
element()	Gets the root widget element.
endUpdate()	Refreshes the widget after a call of the beginUpdate() method.
exportTo(fileName, format)	Exports the widget.
getCurrentNode()	Gets the current node.
getDataSource()	Gets the DataSource instance.
getInstance(element)	Gets the instance of a widget found using its DOM node.
getRootNode()	Gets the root node.
getSize()	Gets the current widget size.
hideLoadingIndicator()	Hides the loading indicator.
hideTooltip()	Hides the tooltip.
instance()	Gets the widget's instance. Use it to access other methods of the widget.
off(eventName)	Detaches all event handlers from a single event.
off(eventName, eventHandler)	Detaches a particular event handler from a single event.
on(eventName, eventHandler)	Subscribes to an event.
on(events)	Subscribes to events.
option()	Gets all widget options.
option(optionName)	Gets the value of a single option.
option(optionName, optionValue)	Updates the value of a single option.
option(options)	Updates the values of several options.
print()	Opens the browser's print window.
render()	Redraws the widget.
resetDrillDown()	Resets the drill down level.
showLoadingIndicator()	Shows the loading indicator.
svg()	Gets the widget's SVG markup.

Events

This section describes events fired by this widget.

Name	Description
click	Fires when the user clicks a node.
disposing	Raised when the widget is removed from the DOM using the remove(), empty(), or html() jQuery methods only.
drawn	Raised when the widget's rendering has finished.
drill	Fires when the user drills up or down.
exported	Raised after data from the widget is exported.
exporting	Raised before data from the widget is exported.
fileSaving	Raised before a file with exported data is saved on the user's local storage.
hoverChanged	Fires when the hover state of a node has been changed.
incidentOccurred	Raised when an error or warning appears in the widget.
initialized	Raised only once, after the widget is initialized.
nodesInitialized	Fires when all nodes in the widget are initialized.
nodesRendering	Fires before nodes will be displayed.
optionChanged	Raised after a widget option is changed.
selectionChanged	Fires when the selection state of a node has been changed.

Node

This section describes the Node object, which represents a treemap node.

Node objects are accessible within certain event handlers, for example, onNodesInitialized, onNodesRendering, etc. Also, you can obtain these objects using the getRootNode() and getCurrentNode() methods.

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See Also

See Also