OpenLayers

Class: Extent

ol.interaction.Extent

Allows the user to draw a vector box by clicking and dragging on the map. Once drawn, the vector box can be modified by dragging its vertices or edges. This interaction is only supported for mouse devices.

new ol.interaction.Extent(opt_options)

src/ol/interaction/extent.js, line 31
Name Type Description
options

Options.

Name Type Description
extent ol.Extent | undefined

Initial extent. Defaults to no initial extent
boxStyle ol.style.Style | Array.<ol.style.Style> | ol.StyleFunction | undefined

Style for the drawn extent box. Defaults to ol.style.Style.createDefaultEditing()[ol.geom.GeometryType.POLYGON]
pointerStyle ol.style.Style | Array.<ol.style.Style> | ol.StyleFunction | undefined

Style for the cursor used to draw the extent. Defaults to ol.style.Style.createDefaultEditing()[ol.geom.GeometryType.POINT]
wrapX boolean | undefined

Wrap the drawn extent across multiple maps in the X direction? Only affects visuals, not functionality. Defaults to false.
Fires:

Extends

Classes

Event

Observable Properties

Name Type Settable ol.Object.Event type Description
active boolean yes change:active

true if the interaction is active, false otherwise.

Methods

changed() inherited

src/ol/observable.js, line 58

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

dispatchEvent(event) inherited

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 101

Gets a value.

Name Type Description
key string

Key name.
Returns:
Value.

getActive(){boolean} inherited

src/ol/interaction/interaction.js, line 55

Return whether the interaction is currently active.

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

getExtent(){ol.Extent}

src/ol/interaction/extent.js, line 424

Returns the current drawn extent in the view projection

Returns:
Drawn extent in the view projection.

getKeys(){Array.<string>} inherited

src/ol/object.js, line 115

Get a list of object property names.

Returns:
List of property names.

getMap(){ol.Map} inherited

src/ol/interaction/interaction.js, line 66

Get the map associated with this interaction.

Returns:
Map.

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

src/ol/object.js, line 125

Get an object of all property names and values.

Returns:
Object.

getRevision(){number} inherited

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 150

Sets a value.

Name Type Description
key string

Key name.
value *

Value.
silent boolean

Update without triggering an event.

setActive(active) inherited

src/ol/interaction/interaction.js, line 77

Activate or deactivate the interaction.

Name Type Description
active boolean

Active.

setExtent(extent)

src/ol/interaction/extent.js, line 434

Manually sets the drawn extent, using the view projection.

Name Type Description
extent ol.Extent

Extent

setProperties(values, opt_silent) inherited

src/ol/object.js, line 170

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.

unset(key, opt_silent) inherited

src/ol/object.js, line 184

Unsets a property.

Name Type Description
key string

Key name.
silent boolean

Unset without triggering an event.

Events

ol.interaction.Extent.event:Event

src/ol/interaction/extent.js, line 469

Triggered after the extent is changed