Angular TreeMap API

The TreeMap is a widget that displays hierarchical data by using nested rectangles.

import { DxTreeMapModule } from "devextreme-angular"

Type: DxTreeMapTypes.default

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.

View Demo

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	Binds the widget to data.
disabled	Specifies whether the widget responds to the user interaction.
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 function that is executed when a node is clicked or tapped.
onDisposing	A function that is executed before the widget is disposed of.
onDrawn	A function that is executed when the widget's rendering has finished.
onDrill	A function that is executed when a user drills up or down.
onExported	A function that is executed after the widget is exported.
onExporting	A function that is executed before the widget is exported.
onFileSaving	A function that is executed before a file with exported widget is saved to the user's local storage.
onHoverChanged	A function that is executed after the pointer enters or leaves a node.
onIncidentOccurred	A function that is executed when an error or warning occurs.
onInitialized	A function used in JavaScript frameworks to save the widget instance.
onNodesInitialized	A function that is executed only once, after the nodes are initialized.
onNodesRendering	A function that is executed before the nodes are displayed and each time the collection of active nodes is changed.
onOptionChanged	A function that is executed after a widget option is changed.
onSelectionChanged	A function that is executed when a node is selected or selection is canceled.
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.
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	Raised when a node is clicked or tapped.
disposing	Raised before the widget is disposed of.
drawn	Raised when the widget's rendering has finished.
drill	Raised when a user drills up or down.
exported	Raised after the widget is exported.
exporting	Raised before the widget is exported.
fileSaving	Raised before a file with exported widget is saved to the user's local storage.
hoverChanged	Raised after the pointer enters or leaves a node.
incidentOccurred	Raised when an error or warning occurs.
initialized	Raised only once, after the widget is initialized.
nodesInitialized	Raised only once, after the nodes are initialized.
nodesRendering	Raised before the nodes are displayed and each time the collection of active nodes is changed.
optionChanged	Raised after a widget option is changed.
selectionChanged	Raised when a node is selected or selection is canceled.

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.

Angular TreeMap API

See Also

Configuration

See Also

Methods

See Also

Events

See Also

Node