Methods

This section describes the methods that can be used in code to manipulate objects related to the widget.

beginUpdate()

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

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

See Also

center()

Gets the current map center coordinates.

Return Value:

Array<Number>

The current map center coordinates.

This method returns the center coordinates as an array of two values in the [longitude, latitude] format.

View Demo

See Also

center(centerCoordinates)

Sets the map center coordinates.

Parameters:
centerCoordinates:

Array<Number>

New map center coordinates. Pass null to reset the coordinates.

To change the coordinates of the map center, pass an array of two values in the [longitude, latitude] form as the argument to the center(centerCoordinates) method.

In addition, you can get the current coordinates of the map center by calling the same method without arguments. Moreover, you can perform specific actions when the center coordinates are changed. For this purpose, implement a callback function and assign it to the onCenterChanged option.

View Demo

See Also

clearAreaSelection()

Deprecated

Use the clearSelection() method instead.

Deselects all the selected areas on a map. The areas are displayed in their initial style after.

To select/deselect a certain area, use the selected(state) method of an area.

See Also

clearMarkerSelection()

Deprecated

Use the clearSelection() method instead.

Deselects all the selected markers on a map. The markers are displayed in their initial style after.

To select/deselect a certain marker, use the selected(state) method of a marker.

See Also

clearSelection()

Deselects all the selected area and markers on a map at once. The areas and markers are displayed in their initial style after.

convertCoordinates(x, y)

Converts client area coordinates into map coordinates.

Parameters:
x:

Number

An X coordinate of the client area.

y:

Number

An Y coordinate of the client area.

Return Value:

Array<Number>

Map coordinates.

See Also

dispose()

Removes the widget from the DOM.

element()

Gets the root widget element.

Return Value:

Element (jQuery or HTML)

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

See Also

endUpdate()

Refreshes the widget after a call of the beginUpdate() method.

Main article: beginUpdate()

See Also

exportTo(fileName, format)

Exports the widget.

Parameters:
fileName:

String

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

format:

String

The file's format.
Possible values: 'PNG' | 'PDF' | 'JPEG' | 'SVG' | 'GIF'

NOTE
Safari on Mac OS does not implement an API for saving files. Therefore, exporting in these browsers requires setting up a server-side proxy. For details, refer to the export | proxyUrl option description.

View Demo

See Also

getAreas()

Deprecated

Use the getLayers() method instead.

Gets an array with all the map areas.

Return Value:

Array<Area>

Area objects.

Discover which methods and fields of a map area you can use within the Area class description.

See Also

getInstance(element)

Gets the instance of a widget found using its DOM node.

Parameters:
element:

DOM Node

|

jQuery

The widget's container.

Return Value:

Object

The widget's instance.

The following code gets the VectorMap instance found in an element with ID myVectorMap:

// Modular approach
import VectorMap from 'devextreme/viz/vector_map';
...
let element = document.getElementById("myVectorMap");
let instance = VectorMap.getInstance(element) as VectorMap;

// Non-modular approach
let element = document.getElementById("myVectorMap");
let instance = DevExpress.ui.dxVectorMap.getInstance(element);
See Also

getLayerByIndex(index)

Gets a layer with a specific index.

Parameters:
index:

Number

The index in the layers array.

Return Value:

Layer Element

The Layer object.

See Also

getLayerByName(name)

Gets a layer with a specific name.

Parameters:
name:

String

The layer's name.

Return Value:

Layer Element

The Layer object.

See Also

getLayers()

Gets all layers.

Return Value:

Array<Layer Element>

The Layer objects.

See Also

getMarkers()

Deprecated

Use the getLayers() method instead.

Gets all the map markers.

Return Value:

Array<Marker>

The Marker objects.

See Also

getSize()

Gets the current widget size.

Return Value:

size

The current widget size.

Returns an object with the following fields.

  • width
    The width of the widget in pixels.
  • height
    The height of the widget in pixels.
See Also

hideLoadingIndicator()

Hides the loading indicator.

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

See Also

instance()

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

Return Value:

Object

This widget's instance.

See Also

off(eventName)

Detaches all event handlers from a single event.

Parameters:
eventName:

String

The event's name.

Return Value:

Object

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:

Object

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:

Object

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:

Object

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 widget options.

Return Value:

Object

The widget's options.

option(optionName)

Gets the value of a single option.

Parameters:
optionName:

String

The option's name or full path.

Return Value: any

This option's value.

option(optionName, optionValue)

Updates the value of a single option.

Parameters:
optionName:

String

The option's name or full path.

optionValue: any

This option's new value.

option(options)

Updates the values of several options.

Parameters:
options:

Object

Options with their new values.

print()

Opens the browser's print window.

render()

Redraws the widget.

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

See Also

showLoadingIndicator()

Shows the loading indicator.

svg()

Gets the widget's SVG markup.

Return Value:

String

The widget's SVG markup.

viewport()

Gets the current map viewport coordinates.

Return Value:

Array<Number>

The viewport coordinates.

This method returns the viewport coordinates as an array of four values in the [minLongitude, maxLatitude, maxLongitude, minLatitude] form.

View Demo

See Also

viewport(viewportCoordinates)

Sets the map viewport coordinates.

Parameters:
viewportCoordinates:

Array<Number>

New viewport coordinates. Pass null to reset the viewport.

To change the coordinates of the map viewport, pass an array of four values in the [minLongitude, maxLatitude, maxLongitude, minLatitude] form as the argument to the viewport(viewportCoordinates) method. If the passed coordinates do not fit the aspect ratio of the widget container precisely, either the latitude or longitude will be applied depending on the largest range.

In addition, you can get the current coordinates of the map viewport by calling the same method without arguments.

If you have implemented the onCenterChanged or onZoomFactorChanged callback functions, they will be triggered when the viewport coordinates are changed using the viewport(viewportCoordinates) method.

View Demo

See Also

zoomFactor()

Gets the current zoom factor value.

Return Value:

Number

The zoom factor value.

View Demo

See Also

zoomFactor(zoomFactor)

Sets the zoom factor value.

Parameters:
zoomFactor:

Number

A new zoom factor value. Pass null to reset the zoom factor.

To change the zoom factor, pass an numeric value as the argument to the zoomFactor(zoomFactor) method.

In addition, you can get the current value of the map zoom factor by calling the same method without arguments. Moreover, you can perform specific actions when the zoom factor is changed. For this purpose, implement a callback function and assign it to the onZoomFactorChanged option.

See Also