Class: Base

Subclasses

• ol.layer.Group
• ol.layer.Layer

Extends

• ol.Object

Observable Properties

Name	Type	Settable	ol.ObjectEvent type	Description
extent	ol.Extent | undefined	yes	change:extent	The layer extent.
maxResolution	number	yes	change:maxresolution	The maximum resolution of the layer.
minResolution	number	yes	change:minresolution	The minimum resolution of the layer.
opacity	number	yes	change:opacity	The opacity of the layer.
visible	boolean	yes	change:visible	The visibility of the layer.
zIndex	number	yes	change:zindex	The Z-index of the layer.

Methods

changed() inherited experimental

src/ol/observable.js, line 50

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

dispatchEvent(event) inherited experimental

src/ol/observable.js, line 72

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	goog.events.EventLike	Event object.

get(key){*} inherited

src/ol/object.js, line 147

Gets a value.

Name	Type	Description
key	string	Key name.

Returns:

Value.

getExtent(){ol.Extent|undefined}

src/ol/layer/layerbase.js, line 125

Return the extent of the layer or undefined if it will be visible regardless of extent.

Returns:

The layer extent.

getKeys(){Array.<string>} inherited

src/ol/object.js, line 161

Get a list of object property names.

Returns:

List of property names.

getMaxResolution(){number}

src/ol/layer/layerbase.js, line 137

Return the maximum resolution of the layer.

Returns:

The maximum resolution of the layer.

getMinResolution(){number}

src/ol/layer/layerbase.js, line 149

Return the minimum resolution of the layer.

Returns:

The minimum resolution of the layer.

getOpacity(){number}

src/ol/layer/layerbase.js, line 161

Return the opacity of the layer (between 0 and 1).

Returns:

The opacity of the layer.

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

src/ol/object.js, line 171

Get an object of all property names and values.

Returns:

Object.

getRevision(){number} inherited experimental

src/ol/observable.js, line 81

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

Returns:

Revision.

getVisible(){boolean}

src/ol/layer/layerbase.js, line 178

Return the visibility of the layer (true or false).

Returns:

The visibility of the layer.

getZIndex(){number} experimental

src/ol/layer/layerbase.js, line 190

Return the Z-index of the layer, which is used to order layers before rendering. The default Z-index is 0.

Returns:

The Z-index of the layer.

on(type, listener, opt_this){goog.events.Key} inherited

src/ol/observable.js, line 94

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.

once(type, listener, opt_this){goog.events.Key} inherited

src/ol/observable.js, line 107

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.

set(key, value, opt_silent) inherited

src/ol/object.js, line 201

Sets a value.

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

setExtent(extent)

src/ol/layer/layerbase.js, line 202

Set the extent at which the layer is visible. If undefined, the layer will be visible at all extents.

Name	Type	Description
extent	ol.Extent | undefined	The extent of the layer.

setMaxResolution(maxResolution)

src/ol/layer/layerbase.js, line 213

Set the maximum resolution at which the layer is visible.

Name	Type	Description
maxResolution	number	The maximum resolution of the layer.

setMinResolution(minResolution)

src/ol/layer/layerbase.js, line 224

Set the minimum resolution at which the layer is visible.

Name	Type	Description
minResolution	number	The minimum resolution of the layer.

setOpacity(opacity)

src/ol/layer/layerbase.js, line 235

Set the opacity of the layer, allowed values range from 0 to 1.

Name	Type	Description
opacity	number	The opacity of the layer.

setProperties(values, opt_silent) inherited

src/ol/object.js, line 221

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.

setVisible(visible)

src/ol/layer/layerbase.js, line 246

Set the visibility of the layer (true or false).

Name	Type	Description
visible	boolean	The visibility of the layer.

setZIndex(zindex) experimental

src/ol/layer/layerbase.js, line 258

Set Z-index of the layer, which is used to order layers before rendering. The default Z-index is 0.

Name	Type	Description
zindex	number	The z-index of the layer.

un(type, listener, opt_this) inherited

src/ol/observable.js, line 120

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 133

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	goog.events.Key	The key returned by on() or once().

unset(key, opt_silent) inherited

src/ol/object.js, line 235

Unsets a property.

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