Class: Zoom

ol/control/Zoom~Zoom 


import Zoom from 'ol/control/Zoom.js';

A control with 2 buttons, one for zoom in and one for zoom out. This control is one of the default controls of a map. To style this control use css selectors .ol-zoom-in and .ol-zoom-out.

new Zoom(options)

control/Zoom.js, line 34
Name Type Description
duration number (defaults to 250)

Animation duration in milliseconds.
className string (defaults to 'ol-zoom')

CSS class name.
zoomInClassName string (defaults to className + '-in')

CSS class name for the zoom-in button.
zoomOutClassName string (defaults to className + '-out')

CSS class name for the zoom-out button.
zoomInLabel string | HTMLElement (defaults to '+')

Text label to use for the zoom-in button. Instead of text, also an element (e.g. a span element) can be used.
zoomOutLabel string | HTMLElement (defaults to '–')

Text label to use for the zoom-out button. Instead of text, also an element (e.g. a span element) can be used.
zoomInTipLabel string (defaults to 'Zoom in')

Text label to use for the button tip.
zoomOutTipLabel string (defaults to 'Zoom out')

Text label to use for the button tip.
delta number (defaults to 1)

The zoom delta applied on each click.
target HTMLElement | string | undefined

Specify a target if you want the control to be rendered outside of the map's viewport.
Fires:

Extends

Methods

changed() inherited

Observable.js, line 68

Increases the revision counter and dispatches a 'change' event.

dispatchEvent(event){boolean | undefined} inherited

events/Target.js, line 85

Dispatches an event and calls all listeners listening for events of this type. The event parameter can either be a string or an Object with a type property.

Name Type Description
event BaseEvent | string

Event object.
Returns:
false if anyone called preventDefault on the event object or if any of the listeners returned false.

get(key){*} inherited

Object.js, line 135

Gets a value.

Name Type Description
key string

Key name.
Returns:
Value.

getKeys(){Array.<string>} inherited

Object.js, line 148

Get a list of object property names.

Returns:
List of property names.

getMap(){Map | null} inherited

control/Control.js, line 104

Get the map associated with this control.

Returns:
Map.

getProperties(){Object.<string, *>} inherited

Object.js, line 157

Get an object of all property names and values.

Returns:
Object.

getRevision(){number} inherited

Observable.js, line 79

Get the version number for this object. Each time the object is modified, its version number will be incremented.

Returns:
Revision.

on(type, listener){EventsKey | Array<EventsKey>} inherited

Observable.js, line 152

Listen for a certain type of event.

Name Type Description
type string | Array.<string>

The event type or array of event types.
listener function

The listener function.
Returns:
Unique key for the listener. If called with an array of event types as the first argument, the return will be an array of keys.

once(type, listener){EventsKey | Array<EventsKey>} inherited

Observable.js, line 164

Listen once for a certain type of event.

Name Type Description
type string | Array.<string>

The event type or array of event types.
listener function

The listener function.
Returns:
Unique key for the listener. If called with an array of event types as the first argument, the return will be an array of keys.

render(mapEvent) inherited

control/Control.js, line 142

Renders the control.

Name Type Description
mapEvent MapEvent

Map event.

set(key, value, silent) inherited

Object.js, line 215

Sets a value.

Name Type Description
key string

Key name.
value *

Value.
silent boolean | undefined

Update without triggering an event.

setMap(map) inherited

control/Control.js, line 116

Remove the control from its current map and attach it to the new map. Pass null to just remove the control from the current map. Subclasses may set up event handlers to get notified about changes to the map here.

Name Type Description
map Map | null

Map.

setProperties(values, silent) inherited

Object.js, line 235

Sets a collection of key-value pairs. Note that this changes any existing properties and adds new ones (it does not remove any existing properties).

Name Type Description
values Object.<string, *>

Values.
silent boolean | undefined

Update without triggering an event.

setTarget(target) inherited

control/Control.js, line 153

This function is used to set a target element for the control. It has no effect if it is called after the control has been added to the map (i.e. after setMap is called on the control). If no target is set in the options passed to the control constructor and if setTarget is not called then the control is added to the map's overlay container.

Name Type Description
target HTMLElement | string

Target.

un(type, listener) inherited

Observable.js, line 173

Unlisten for a certain type of event.

Name Type Description
type string | Array.<string>

The event type or array of event types.
listener function

The listener function.

unset(key, silent) inherited

Object.js, line 259

Unsets a property.

Name Type Description
key string

Key name.
silent boolean | undefined

Unset without triggering an event.