Class Snap

Classdesc

Handles snapping of vector features while modifying or drawing them. The features can come from a ol.source.Vector or ol.Collection Any interaction object that allows the user to interact with the features using the mouse can benefit from the snapping, as long as it is added before.

The snap interaction modifies map browser event coordinate and pixel properties to force the snap to occur to any interaction that them.

Example:

var snap = new ol.interaction.Snap({
  source: source
});

Param: opt_options

Options.

Api

Hierarchy

Constructors

constructor

Methods

addFeature changed dispatchEvent get getActive getKeys getMap getProperties getRevision on once removeFeature set setActive setProperties un unByKey unset handleEvent unByKey

Constructors

constructor

  • new Snap(opt_options?): Snap

  • Parameters

    Returns Snap

    Classdesc

    Handles snapping of vector features while modifying or drawing them. The features can come from a ol.source.Vector or ol.Collection Any interaction object that allows the user to interact with the features using the mouse can benefit from the snapping, as long as it is added before.

    The snap interaction modifies map browser event coordinate and pixel properties to force the snap to occur to any interaction that them.

    Example:

    var snap = new ol.interaction.Snap({
      source: source
    });

    Api

Methods

addFeature

  • addFeature(feature, opt_listen?): void

  • Add a feature to the collection of features that we may snap to.

    Parameters

    • feature: ol.Feature

      Feature.

    • Optional opt_listen: boolean

      Whether to listen to the geometry change or not Defaults to true.

    Returns void

    Api

changed

  • changed(): void

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

    Returns void

    Api

dispatchEvent

  • dispatchEvent(event): void

  • 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.

    Parameters

    Returns void

    Function

    Api

get

  • get(key): any

  • Gets a value.

    Parameters

    • key: string

      Key name.

    Returns any

    Value.

    Api

    stable

getActive

  • getActive(): boolean

  • Return whether the interaction is currently active.

    Returns boolean

    true if the interaction is active, false otherwise.

    Observable

    Api

getKeys

  • getKeys(): string[]

  • Get a list of object property names.

    Returns string[]

    List of property names.

    Api

    stable

getMap

  • getMap(): Map

  • Get the map associated with this interaction.

    Returns Map

    Map.

    Api

getProperties

  • getProperties(): {
        [k: string]: any;
    }

  • Get an object of all property names and values.

    Returns {
        [k: string]: any;
    }

    Object.

    • [k: string]: any

    Api

    stable

getRevision

  • getRevision(): number

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

    Returns number

    Revision.

    Api

on

  • on(type, listener, opt_this?): Object | Object[]

  • Listen for a certain type of event.

    Parameters

    • type: string | string[]

      The event type or array of event types.

    • listener: Function

      The listener function.

    • Optional opt_this: Object

      The object to use as this in listener.

    Returns Object | Object[]

    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.

    Api

    stable

once

  • once(type, listener, opt_this?): Object | Object[]

  • Listen once for a certain type of event.

    Parameters

    • type: string | string[]

      The event type or array of event types.

    • listener: Function

      The listener function.

    • Optional opt_this: Object

      The object to use as this in listener.

    Returns Object | Object[]

    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.

    Api

    stable

removeFeature

  • removeFeature(feature, opt_unlisten?): void

  • Remove a feature from the collection of features that we may snap to.

    Parameters

    • feature: ol.Feature

      Feature

    • Optional opt_unlisten: boolean

      Whether to unlisten to the geometry change or not. Defaults to true.

    Returns void

    Api

set

  • set(key, value, opt_silent?): void

  • Sets a value.

    Parameters

    • key: string

      Key name.

    • value: any

      Value.

    • Optional opt_silent: boolean

      Update without triggering an event.

    Returns void

    Api

    stable

setActive

  • setActive(active): void

  • Activate or deactivate the interaction.

    Parameters

    • active: boolean

      Active.

    Returns void

    Observable

    Api

setProperties

  • setProperties(values, opt_silent?): void

  • 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).

    Parameters

    • values: {
          [k: string]: any;
      }

      Values.

      • [k: string]: any
    • Optional opt_silent: boolean

      Update without triggering an event.

    Returns void

    Api

    stable

un

  • un(type, listener, opt_this?): void

  • Unlisten for a certain type of event.

    Parameters

    • type: string | string[]

      The event type or array of event types.

    • listener: Function

      The listener function.

    • Optional opt_this: Object

      The object which was used as this by the listener.

    Returns void

    Api

    stable

unByKey

  • unByKey(key): void

  • 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.

    Parameters

    • key: Object | Object[]

      The key returned by on() or once() (or an array of keys).

    Returns void

    Function

    Api

    stable

unset

  • unset(key, opt_silent?): void

  • Unsets a property.

    Parameters

    • key: string

      Key name.

    • Optional opt_silent: boolean

      Unset without triggering an event.

    Returns void

    Api

    stable

Static handleEvent

  • handleEvent(mapBrowserEvent): boolean

  • Handles the map browser event and may call into other functions, if event sequences like e.g. 'drag' or 'down-up' etc. are detected.

    Parameters

    Returns boolean

    false to stop event propagation.

    Api

Static unByKey

  • unByKey(key): void

  • Removes an event listener using the key returned by on() or once().

    Parameters

    • key: Object | Object[]

      The key returned by on() or once() (or an array of keys).

    Returns void

    Api

    stable

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