JavaScript/jQuery TreeMap Methods

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

See Also

beginUpdate()

Prevents the UI component from refreshing until the endUpdate() method is called.

The beginUpdate() and endUpdate() methods prevent the UI component from excessive updates when you are changing multiple UI component settings at once. After the beginUpdate() method is called, the UI component does not update its UI until the endUpdate() method is called.

See Also

clearSelection()

Deselects all nodes in the UI component.

To deselect a particular node, call its select(state) method.

dispose()

Disposes of all the resources allocated to the TreeMap instance.

After calling this method, remove the DOM element associated with the UI component:

JavaScript
$("#myTreeMap").dxTreeMap("dispose");
$("#myTreeMap").remove();

Use this method only if the UI component was created with jQuery or pure JavaScript. In Angular, Vue, and React, use conditional rendering:

Angular
app.component.html
<dx-tree-map ...
    *ngIf="condition">
</dx-tree-map>
Vue
App.vue
<template>
    <DxTreeMap ...
        v-if="condition">
    </DxTreeMap>
</template>

<script>
import DxTreeMap from 'devextreme-vue/tree-map';

export default {
    components: {
        DxTreeMap
    }
}
</script>
React
App.js
import React from 'react';

import TreeMap from 'devextreme-react/tree-map';

function DxTreeMap(props) {
    if (!props.shouldRender) {
        return null;
    }

    return (
        <TreeMap ... >    
        </TreeMap>
    );
}

class App extends React.Component {
    render() {
        return (
            <DxTreeMap shouldRender="condition" />
        );
    }
}
export default App;
See Also

drillUp()

Drills one level up.

To learn how to implement the drill down functionality, see the drillDown() method description.

element()

Gets the root UI component element.

Return Value:

HTMLElement | jQuery

An HTML element or a jQuery element when you use jQuery.

See Also

endUpdate()

Refreshes the UI component after a call of the beginUpdate() method.

Main article: beginUpdate()

See Also

exportTo(fileName, format)

Exports the UI component.

Parameters:
fileName:

String

The name of the file to which the UI component is about to be exported.

format:

String

The file's format. One of 'PNG', 'PDF', 'JPEG', 'SVG' and 'GIF'.
PNG is used if the browser does not support exporting to the specified format.

View Demo

See Also

getCurrentNode()

Gets the current node.

Return Value:

TreeMap Node

The Node object.

NOTE
If the drill down feature is not implemented, this method returns the root node.
See Also

getDataSource()

Gets the DataSource instance.

Return Value:

DataSource

The DataSource instance.

NOTE
This method returns the DataSource instance even if the UI component's dataSource property was given a simple array.
See Also

getInstance(element)

Gets the instance of a UI component found using its DOM node.

Parameters:
element:

DOM Node

|

jQuery

The UI component's container.

Return Value:

Object

The UI component's instance.

getInstance is a static method that the UI component class supports. The following code demonstrates how to get the TreeMap instance found in an element with the myTreeMap ID:

// Modular approach
import TreeMap from "devextreme/viz/tree_map";
...
let element = document.getElementById("myTreeMap");
let instance = TreeMap.getInstance(element) as TreeMap;

// Non-modular approach
let element = document.getElementById("myTreeMap");
let instance = DevExpress.viz.dxTreeMap.getInstance(element);
See Also

getRootNode()

Gets the root node.

Return Value:

TreeMap Node

The root node; described in the Node section.

See Also

getSize()

Gets the current UI component size.

Return Value:

Size

The current UI component size.

Returns an object with the following fields.

  • width
    The width of the UI component in pixels.
  • height
    The height of the UI component in pixels.
See Also

hideLoadingIndicator()

Hides the loading indicator.

Although the loading indicator hides automatically once the UI component is ready, you can hide it from code at the required moment using this method.

See Also

hideTooltip()

Hides the tooltip.

Use this and showTooltip() methods to change the visibility of the tooltip programmatically.

See Also

instance()

Gets the UI component's instance. Use it to access other methods of the UI component.

Return Value:

TreeMap

This UI component's instance.

See Also

off(eventName)

Detaches all event handlers from a single event.

Parameters:
eventName:

String

The event's name.

Return Value:

TreeMap

The object for which this method is called.

See Also

off(eventName, eventHandler)

Detaches a particular event handler from a single event.

Parameters:
eventName:

String

The event's name.

eventHandler:

Function

The event's handler.

Return Value:

TreeMap

The object for which this method is called.

See Also

on(eventName, eventHandler)

Subscribes to an event.

Parameters:
eventName:

String

The event's name.

eventHandler:

Function

The event's handler.

Return Value:

TreeMap

The object for which this method is called.

Use this method to subscribe to one of the events listed in the Events section.

See Also

on(events)

Subscribes to events.

Parameters:
events:

Object

Events with their handlers: { "eventName1": handler1, "eventName2": handler2, ...}

Return Value:

TreeMap

The object for which this method is called.

Use this method to subscribe to several events with one method call. Available events are listed in the Events section.

See Also

option()

Gets all UI component properties.

Return Value:

Object

The UI component's properties.

See Also

option(optionName)

Gets the value of a single property.

Parameters:
optionName:

String

The property's name or full path.

Return Value: any

This property's value.

See Also

option(optionName, optionValue)

Updates the value of a single property.

Parameters:
optionName:

String

The property's name or full path.

optionValue: any

This property's new value.

See Also

option(options)

Updates the values of several properties.

Parameters:
options:

Object

Propertieswith their new values.

See Also

print()

Opens the browser's print window.

View Demo

See Also

render()

Redraws the UI component.

Normally, the UI component redraws itself automatically after the browser window is resized. But on rare occasions, you may need to request the redrawing, for example, after the UI component's container is resized. For this purpose, call the render() method.

See Also

resetDrillDown()

Resets the drill down level.

Calling this method makes the root level the current one. If you need to drill one level up or down, use the drillUp() method of the UI component or the drillDown() method of a node.

See Also

resetOption(optionName)

Resets an property to its default value.

Parameters:
optionName:

String

An property's name.

See Also

showLoadingIndicator()

Shows the loading indicator.

See Also

svg()

Gets the UI component's SVG markup.

Return Value:

String

The UI component's SVG markup.

View Demo

See Also