Angular TreeMap API
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.
See Also
- Set Up DevExtreme: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
- Configure a Widget: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
Properties
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. |
See Also
- Configure a Widget: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
Methods
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. |
See Also
- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
Events
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. |
See Also
- Handle Events: Angular | Vue | React | jQuery | AngularJS | Knockout | ASP.NET MVC 5 | ASP.NET Core
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.
If you have technical questions, please create a support ticket in the DevExpress Support Center.