API Docs for: 1.0.0
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MultiObject Class

Extends EventTarget
Defined in: src/gallery-multiobject/js/MultiObject.js:7
Module: gallery-multiobject

MultiObject exposes exactly the same API as each individual object, both functions and events, and the state of all the objects is kept in sync. The objects must maintain all state via Y.Attribute.

MultiObject is similar to Y.ArrayList, except:

  • All objects must be of the same type, since MultiObject is supposed to behave exactly like any single object.
  • MultiObject automatically delegates all methods.
  • By default, MultiObject returns the result from the first object in the list, not an array of results.
  • MultiObject propagates all events.

Internally, MultiObject delegates all methods by name, so it supports Y.Do.before, Y.Do.after, etc.

To avoid shadowing potential function names, we inherit from Y.EventTarget and use multi_ as the prefix for our own functions.

Constructor

MultiObject

(
  • items
  • config
)

Defined in src/gallery-multiobject/js/MultiObject.js:7

Parameters:

  • items Array

    initial set of items

  • config Object

    configuration

    • return_all_results=false Boolean

      If this is true, then all delegated functions will return an array of results instead of the result from the primary item. Note that functions which return undefined or the item itself always cause the MultiObject to be returned, to support chaining.

    • primary_item_index=0 Number

      When return_all_results=false, this is the index of the item which generates the return result for all delegated functions.

Methods

_getFullType

(
  • type
)
String private

Inherited from EventTarget: event-custom/js/event-target.js:564

Returns the fully qualified type, given a short type string. That is, returns "foo:bar" when given "bar" if "foo" is the configured prefix. NOTE: This method, unlike _getType, does no checking of the value passed in, and is designed to be used with the low level _publish() method, for critical path implementations which need to fast-track publish for performance reasons.

Parameters:

  • type String
    The short type to prefix

Returns:

String: The prefixed type, if a prefix is set, otherwise the type passed in

_getType

() private

Inherited from EventTarget: event-custom/js/event-target.js:36

If the instance has a prefix attribute and the event type is not prefixed, the instance prefix is applied to the supplied type.

_hasPotentialSubscribers

(
  • fullType
)
Boolean private

Inherited from EventTarget: event-custom/js/event-facade.js:643

Parameters:

  • fullType String
    The fully prefixed type name

Returns:

Boolean: Whether the event has potential subscribers or not

_monitor

(
  • what
  • eventType
  • o
)
private

Inherited from EventTarget: event-custom/js/event-target.js:636

This is the entry point for the event monitoring system. You can monitor 'attach', 'detach', 'fire', and 'publish'. When configured, these events generate an event. click -> click_attach, click_detach, click_publish -- these can be subscribed to like other events to monitor the event system. Inividual published events can have monitoring turned on or off (publish can't be turned off before it it published) by setting the events 'monitor' config.

Parameters:

  • what String
    'attach', 'detach', 'fire', or 'publish'
  • eventType String | CustomEvent
    The prefixed name of the event being monitored, or the CustomEvent object.
  • o Object
    Information about the event interaction, such as fire() args, subscription category, publish config

_parseType

() private

Inherited from EventTarget: event-custom/js/event-target.js:52

Returns an array with the detach key (if provided), and the prefixed event name from _getType Y.on('detachcategory| menu:click', fn)

_publish

(
  • fullType
  • etOpts
  • ceOpts
)
CustomEvent private

Inherited from EventTarget: event-custom/js/event-target.js:588

The low level event publish implementation. It expects all the massaging to have been done outside of this method. e.g. the type to fullType conversion. It's designed to be a fast path publish, which can be used by critical code paths to improve performance.

Parameters:

  • fullType String
    The prefixed type of the event to publish.
  • etOpts Object
    The EventTarget specific configuration to mix into the published event.
  • ceOpts Object
    The publish specific configuration to mix into the published event.

Returns:

CustomEvent: The published event. If called without etOpts or ceOpts, this will be the default CustomEvent instance, and can be configured independently.

addTarget

(
  • o
)
chainable

Inherited from EventTarget: event-custom/js/event-facade.js:496

Registers another EventTarget as a bubble target. Bubble order is determined by the order registered. Multiple targets can be specified. Events can only bubble if emitFacade is true. Included in the event-custom-complex submodule.

Parameters:

after

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

Inherited from EventTarget: event-custom/js/event-target.js:812

Subscribe to a custom event hosted by this object. The supplied callback will execute after any listeners add via the subscribe method, and after the default function, if configured for the event, has executed.

Parameters:

  • type String
    The name of the event
  • fn Function
    The callback to execute in response to the event
  • [context] Object optional
    Override this object in callback
  • [arg*] Any optional
    0..n additional arguments to supply to the subscriber

Returns:

EventHandle: A subscription handle capable of detaching the subscription

before

()

Inherited from EventTarget: event-custom/js/event-target.js:849

Executes the callback before a DOM event, custom event or method. If the first argument is a function, it is assumed the target is a method. For DOM and custom events, this is an alias for Y.on. For DOM and custom events: type, callback, context, 0-n arguments For methods: callback, object (method host), methodName, context, 0-n arguments

Returns:

detach handle

bubble

(
  • evt
)
Boolean

Inherited from EventTarget: event-custom/js/event-facade.js:554

Propagate an event. Requires the event-custom-complex module.

Parameters:

Returns:

Boolean: the aggregated return value from Event.Custom.fire

detach

(
  • type
  • fn
  • context
)
EventTarget

Inherited from EventTarget: event-custom/js/event-target.js:356

Detach one or more listeners the from the specified event

Parameters:

  • type String | Object
    Either the handle to the subscriber or the type of event. If the type is not specified, it will attempt to remove the listener from all hosted events.
  • fn Function
    The subscribed function to unsubscribe, if not supplied, all subscribers will be removed.
  • context Object
    The custom object passed to subscribe. This is optional, but if supplied will be used to disambiguate multiple listeners that are the same (e.g., you subscribe many object using a function that lives on the prototype)

Returns:

EventTarget: the host

detachAll

(
  • type
)

Inherited from EventTarget: event-custom/js/event-target.js:479

Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.

Parameters:

  • type String
    The type, or name of the event

fire

(
  • type
  • arguments
)
Boolean

Inherited from EventTarget: event-custom/js/event-target.js:673

Fire a custom event by name. The callback functions will be executed from the context specified when the event was created, and with the following parameters. The first argument is the event type, and any additional arguments are passed to the listeners as parameters. If the first of these is an object literal, and the event is configured to emit an event facade, that object is mixed into the event facade and the facade is provided in place of the original object. If the custom event object hasn't been created, then the event hasn't been published and it has no subscribers. For performance sake, we immediate exit in this case. This means the event won't bubble, so if the intention is that a bubble target be notified, the event must be published on this object first.

Parameters:

  • type String | Object
    The type of the event, or an object that contains a 'type' property.
  • arguments Object
    an arbitrary set of parameters to pass to the handler. If the first of these is an object literal and the event is configured to emit an event facade, the event facade will replace that parameter after the properties the object literal contains are copied to the event facade.

Returns:

Boolean: True if the whole lifecycle of the event went through, false if at any point the event propagation was halted.

getEvent

(
  • type
  • prefixed
)
CustomEvent

Inherited from EventTarget: event-custom/js/event-target.js:793

Returns the custom event of the provided type has been created, a falsy value otherwise

Parameters:

  • type String
    the type, or name of the event
  • prefixed String
    if true, the type is prefixed already

Returns:

CustomEvent: the custom event or null

getTargets

()

Inherited from EventTarget: event-custom/js/event-facade.js:523

Returns an array of bubble targets for this object.

Returns:

EventTarget[]

multi_destroy

()

Defined in src/gallery-multiobject/js/MultiObject.js:162

Destroys the MultiObject, but not the individual objects. destroy() is, of course, delegated.

multi_get_all

(
  • f
  • arg
)
Array

Defined in src/gallery-multiobject/js/MultiObject.js:211

Return an array of all the individual results from calling the specified function. This is only useful if return_all_results=false.

Parameters:

  • f String

    name of the function to invoke

  • arg Mixed multiple

    0..n arguments to pass to the function

Returns:

Array:

results from delegating the named function

multi_get_primary_item_index

()

Defined in src/gallery-multiobject/js/MultiObject.js:173

Returns:

the index of the primary item

multi_get_return_all_results

()

Defined in src/gallery-multiobject/js/MultiObject.js:192

Returns:

true if all results will be returned by delegated functions

multi_set_primary_item_index

(
  • index
)

Defined in src/gallery-multiobject/js/MultiObject.js:182

Parameters:

  • index Int

    the index of the primary item

multi_set_return_all_results

(
  • all
)

Defined in src/gallery-multiobject/js/MultiObject.js:201

Parameters:

  • all Boolean

    true if delegated functions should return all results

on

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

Inherited from EventTarget: event-custom/js/event-target.js:188

Subscribe a callback function to a custom event fired by this object or from an object that bubbles its events to this object. this.on("change", this._onChange, this); Callback functions for events published with emitFacade = true will receive an EventFacade as the first argument (typically named "e"). These callbacks can then call e.preventDefault() to disable the behavior published to that event's defaultFn. See the EventFacade API for all available properties and methods. Subscribers to non-emitFacade events will receive the arguments passed to fire() after the event name. To subscribe to multiple events at once, pass an object as the first argument, where the key:value pairs correspond to the eventName:callback. this.on({ "attrChange" : this._onAttrChange, "change" : this._onChange }); You can also pass an array of event names as the first argument to subscribe to all listed events with the same callback. this.on([ "change", "attrChange" ], this._onChange); Returning false from a callback is supported as an alternative to calling e.preventDefault(); e.stopPropagation();. However, it is recommended to use the event methods whenever possible.

Parameters:

  • type String
    The name of the event
  • fn Function
    The callback to execute in response to the event
  • [context] Object optional
    Override this object in callback
  • [arg*] Any optional
    0..n additional arguments to supply to the subscriber

Returns:

EventHandle: A subscription handle capable of detaching that subscription

once

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

Inherited from EventTarget: event-custom/js/event-target.js:124

Listen to a custom event hosted by this object one time. This is the equivalent to on except the listener is immediatelly detached when it is executed.

Parameters:

  • type String
    The name of the event
  • fn Function
    The callback to execute in response to the event
  • [context] Object optional
    Override this object in callback
  • [arg*] Any optional
    0..n additional arguments to supply to the subscriber

Returns:

EventHandle: A subscription handle capable of detaching the subscription

onceAfter

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

Inherited from EventTarget: event-custom/js/event-target.js:146

Listen to a custom event hosted by this object one time. This is the equivalent to after except the listener is immediatelly detached when it is executed.

Parameters:

  • type String
    The name of the event
  • fn Function
    The callback to execute in response to the event
  • [context] Object optional
    Override this object in callback
  • [arg*] Any optional
    0..n additional arguments to supply to the subscriber

Returns:

EventHandle: A subscription handle capable of detaching that subscription

parseType

(
  • type
  • [pre]
)
Array

Inherited from EventTarget: event-custom/js/event-target.js:168

Available since 3.3.0

Takes the type parameter passed to 'on' and parses out the various pieces that could be included in the type. If the event type is passed without a prefix, it will be expanded to include the prefix one is supplied or the event target is configured with a default prefix.

Parameters:

  • type String
    the type
  • [pre] String optional
    The prefix. Defaults to this._yuievt.config.prefix

Returns:

Array: an array containing: * the detach category, if supplied, * the prefixed event type, * whether or not this is an after listener, * the supplied event type

publish

(
  • type
  • opts
)
CustomEvent

Inherited from EventTarget: event-custom/js/event-target.js:503

Creates a new custom event of the specified type. If a custom event by that name already exists, it will not be re-created. In either case the custom event is returned.

Parameters:

  • type String
    the type, or name of the event
  • opts Object
    optional config params. Valid properties are:
    • [broadcast=false] Boolean optional

      whether or not the YUI instance and YUI global are notified when the event is fired.

    • [bubbles=true] Boolean optional

      Whether or not this event bubbles. Events can only bubble if emitFacade is true.

    • [context=this] Object optional

      the default execution context for the listeners.

    • [defaultFn] Function optional

      the default function to execute when this event fires if preventDefault was not called.

    • [emitFacade=false] Boolean optional

      whether or not this event emits a facade.

    • [prefix] String optional

      the prefix for this targets events, e.g., 'menu' in 'menu:click'.

    • [fireOnce=false] Boolean optional

      if an event is configured to fire once, new subscribers after the fire will be notified immediately.

    • [async=false] Boolean optional

      fireOnce event listeners will fire synchronously if the event has already fired unless async is true.

    • [preventable=true] Boolean optional

      whether or not preventDefault() has an effect.

    • [preventedFn] Function optional

      a function that is executed when preventDefault() is called.

    • [queuable=false] Boolean optional

      whether or not this event can be queued during bubbling.

    • [silent] Boolean optional

      if silent is true, debug messages are not provided for this event.

    • [stoppedFn] Function optional

      a function that is executed when stopPropagation is called.

    • [monitored] Boolean optional

      specifies whether or not this event should send notifications about when the event has been attached, detached, or published.

    • [type] String optional

      the event type (valid option if not provided as the first parameter to publish).

Returns:

CustomEvent: the custom event

removeTarget

(
  • o
)
chainable

Inherited from EventTarget: event-custom/js/event-facade.js:533

Removes a bubble target

Parameters:

subscribe

() deprecated

Inherited from EventTarget: event-custom/js/event-target.js:346

Deprecated: use on

subscribe to an event

unsubscribe

() deprecated

Inherited from EventTarget: event-custom/js/event-target.js:469

Deprecated: use detach

detach a listener

unsubscribeAll

(
  • type
)
deprecated

Inherited from EventTarget: event-custom/js/event-target.js:490

Deprecated: use detachAll

Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.

Parameters:

  • type String
    The type, or name of the event