Class: Interaction

ol/interaction/Interaction~Interaction


import Interaction from 'ol/interaction/Interaction';

Abstract base class; normally only used for creating subclasses and not instantiated in apps. User actions that change the state of the map. Some are similar to controls, but are not associated with a DOM element. For example, KeyboardZoom is functionally the same as Zoom, but triggered by a keyboard event not a button element event. Although interactions do not have a DOM element, some of them do render vectors and so are visible on the screen.

new Interaction(options)

Name Type Description
handleEvent function

Method called by the map to notify the interaction that a browser event was dispatched to the map. If the function returns a falsy value, propagation of the event to other interactions in the map's interactions chain will be prevented (this includes functions with no explicit return). The interactions are traversed in reverse order of the interactions collection of the map.

Fires:

Subclasses

Extends

Observable Properties

Name Type Settable ObjectEvent type Description
active boolean yes change:active

true if the interaction is active, false otherwise.

Methods

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

dispatchEvent(event){boolean | undefined} inherited

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.

Gets a value.

Name Type Description
key string

Key name.

Returns:
Value.

getActive(){boolean}

Return whether the interaction is currently active.

Returns:
true if the interaction is active, false otherwise.

getKeys(){Array.<string>} inherited

Get a list of object property names.

Returns:
List of property names.

Get the map associated with this interaction.

Returns:
Map.

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

Get an object of all property names and values.

Returns:
Object.

getRevision(){number} inherited

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

Returns:
Revision.

handleEvent(mapBrowserEvent){boolean}

Handles the map browser event.

Name Type Description
mapBrowserEvent MapBrowserEvent

Map browser event.

Returns:
false to stop event propagation.

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

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

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.

set(key, value, silent) inherited

Sets a value.

Name Type Description
key string

Key name.

value *

Value.

silent boolean | undefined

Update without triggering an event.

Activate or deactivate the interaction.

Name Type Description
active boolean

Active.

setProperties(values, silent) inherited

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.

un(type, listener) inherited

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

Unsets a property.

Name Type Description
key string

Key name.

silent boolean | undefined

Unset without triggering an event.