OpenLayers

Class: Select

ol.interaction.Select

Interaction for selecting vector features. By default, selected features are styled differently, so this interaction can be used for visual highlighting, as well as selecting features for other actions, such as modification or output. There are three ways of controlling which features are selected: using the browser event as defined by the condition and optionally the toggle, add/remove, and multi options; a layers filter; and a further feature filter using the filter option.

Selected features are added to an internal unmanaged layer.

new ol.interaction.Select(opt_options)

src/ol/interaction/select.js, line 36
Name Type Description
options

Options.

Name Type Description
addCondition ol.EventsConditionType | undefined

A function that takes an ol.MapBrowserEvent and returns a boolean to indicate whether that event should be handled. By default, this is ol.events.condition.never. Use this if you want to use different events for add and remove instead of toggle.
condition ol.EventsConditionType | undefined

A function that takes an ol.MapBrowserEvent and returns a boolean to indicate whether that event should be handled. This is the event for the selected features as a whole. By default, this is ol.events.condition.singleClick. Clicking on a feature selects that feature and removes any that were in the selection. Clicking outside any feature removes all from the selection. See toggle, add, remove options for adding/removing extra features to/ from the selection.
layers undefined | Array.<ol.layer.Layer> | function

A list of layers from which features should be selected. Alternatively, a filter function can be provided. The function will be called for each layer in the map and should return true for layers that you want to be selectable. If the option is absent, all visible layers will be considered selectable.
style ol.style.Style | Array.<ol.style.Style> | ol.StyleFunction | undefined

Style for the selected features. By default the default edit style is used (see ol.style).
removeCondition ol.EventsConditionType | undefined

A function that takes an ol.MapBrowserEvent and returns a boolean to indicate whether that event should be handled. By default, this is ol.events.condition.never. Use this if you want to use different events for add and remove instead of toggle.
toggleCondition ol.EventsConditionType | undefined

A function that takes an ol.MapBrowserEvent and returns a boolean to indicate whether that event should be handled. This is in addition to the condition event. By default, ol.events.condition.shiftKeyOnly, i.e. pressing shift as well as the condition event, adds that feature to the current selection if it is not currently selected, and removes it if it is. See add and remove if you want to use different events instead of a toggle.
multi boolean | undefined

A boolean that determines if the default behaviour should select only single features or all (overlapping) features at the clicked map position. Default is false i.e single select
features ol.Collection.<ol.Feature> | undefined

Collection where the interaction will place selected features. Optional. If not set the interaction will create a collection. In any case the collection used by the interaction is returned by ol.interaction.Select#getFeatures.
filter ol.SelectFilterFunction | undefined

A function that takes an ol.Feature and an ol.layer.Layer and returns true if the feature may be selected or false otherwise.
wrapX boolean | undefined

Wrap the world horizontally on the selection overlay. Default is true.
hitTolerance number | undefined

Hit-detection tolerance. Pixels inside the radius around the given position will be checked for features. This only works for the canvas renderer and not for WebGL. Default is 0.
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

ol.interaction.Select.handleEvent(mapBrowserEvent){boolean}

src/ol/interaction/select.js, line 202

Handles the map browser event and may change the selected state of features.

This:
Name Type Description
mapBrowserEvent ol.MapBrowserEvent

Map browser event.
Returns:
false to stop event propagation.

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.

getFeatures(){ol.Collection.<ol.Feature>}

src/ol/interaction/select.js, line 164

Get the selected features.

Returns:
Features collection.

getHitTolerance(){number}

src/ol/interaction/select.js, line 174

Returns the Hit-detection tolerance.

Returns:
Hit tolerance in pixels.

getKeys(){Array.<string>} inherited

src/ol/object.js, line 115

Get a list of object property names.

Returns:
List of property names.

getLayer(feature){ol.layer.Vector}

src/ol/interaction/select.js, line 188

Returns the associated vectorlayer of the (last) selected feature. Note that this will not work with any programmatic method like pushing features to collection.

Name Type Description
feature ol.Feature | ol.render.Feature

Feature
Returns:
Layer.

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.

setHitTolerance(hitTolerance)

src/ol/interaction/select.js, line 297

Hit-detection tolerance. Pixels inside the radius around the given position will be checked for features. This only works for the canvas renderer and not for WebGL.

Name Type Description
hitTolerance number

Hit tolerance in pixels.

setMap(map)

src/ol/interaction/select.js, line 309

Remove the interaction from its current map, if any, and attach it to a new map, if any. Pass null to just remove the interaction from the current map.

Name Type Description
map ol.Map

Map.

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.