靜態unListen for a certain type of event.
The event type or array of event types.
The listener function.
可選opt_this: ObjectThe object to use as this in listener.
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.
Listen once for a certain type of event.
The event type or array of event types.
The listener function.
可選opt_this: ObjectThe object to use as this in listener.
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.
函數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.
Options.
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, ol.interaction.KeyboardZoom is functionally the same as ol.control.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.
Classdesc
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, ol.interaction.KeyboardZoom is functionally the same as ol.control.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.
參數: options
Options.
Api