Class: MouseWheelZoom

Extends

• ol.interaction.Interaction

Observable Properties

Name	Type	Settable	ol.ObjectEvent type	Description
active	boolean	yes	change:active	true if the interaction is active, false otherwise.

Methods

ol.interaction.MouseWheelZoom.handleEvent(mapBrowserEvent){boolean} experimental

src/ol/interaction/mousewheelzoom.js, line 75

Handles the map browser event (if it was a mousewheel-event) and eventually zooms the map.

This:

• {ol.interaction.MouseWheelZoom}

Name	Type	Description
mapBrowserEvent	ol.MapBrowserEvent	Map browser event.

Returns:

false to stop event propagation.

changed() inherited experimental

src/ol/observable.js, line 58

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

dispatchEvent(event) inherited experimental

src/ol/observable.js, line 75

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	Object | ol.events.Event | string	Event object.

get(key){*} inherited

src/ol/object.js, line 148

Gets a value.

Name	Type	Description
key	string	Key name.

Returns:

Value.

getActive(){boolean} inherited experimental

src/ol/interaction/interaction.js, line 64

Return whether the interaction is currently active.

Returns:

true if the interaction is active, false otherwise.

getKeys(){Array.<string>} inherited

src/ol/object.js, line 162

Get a list of object property names.

Returns:

List of property names.

getMap(){ol.Map} inherited experimental

src/ol/interaction/interaction.js, line 75

Get the map associated with this interaction.

Returns:

Map.

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

src/ol/object.js, line 172

Get an object of all property names and values.

Returns:

Object.

getRevision(){number} inherited experimental

src/ol/observable.js, line 84

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

Returns:

Revision.

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

src/ol/observable.js, line 99

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.
this	Object	The object to use as this in listener.

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, opt_this){ol.EventsKey|Array.<ol.EventsKey>} inherited

src/ol/observable.js, line 124

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.
this	Object	The object to use as this in listener.

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.

set(key, value, opt_silent) inherited

src/ol/object.js, line 197

Sets a value.

Name	Type	Description
key	string	Key name.
value	*	Value.
silent	boolean	Update without triggering an event.

setActive(active) inherited experimental

src/ol/interaction/interaction.js, line 86

Activate or deactivate the interaction.

Name	Type	Description
active	boolean	Active.

setMouseAnchor(useAnchor) experimental

src/ol/interaction/mousewheelzoom.js, line 152

Enable or disable using the mouse's location as an anchor when zooming

Name	Type	Description
useAnchor	boolean	true to zoom to the mouse's location, false to zoom to the center of the map

setProperties(values, opt_silent) inherited

src/ol/object.js, line 217

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	Update without triggering an event.

un(type, listener, opt_this) inherited

src/ol/observable.js, line 147

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.
this	Object	The object which was used as this by the listener.

unByKey(key) inherited

src/ol/observable.js, line 168

Removes an event listener using the key returned by on() or once(). Note that using the ol.Observable.unByKey static function is to be preferred.

Name	Type	Description
key	ol.EventsKey | Array.<ol.EventsKey>	The key returned by on() or once() (or an array of keys).

unset(key, opt_silent) inherited

src/ol/object.js, line 231

Unsets a property.

Name	Type	Description
key	string	Key name.
silent	boolean	Unset without triggering an event.