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Class VirtualArray<T>

Advanced array like class that helps loading items on demand.

Type parameters

  • T

Hierarchy

Index

Constructors

Properties

Accessors

Methods

Constructors

constructor

Properties

Private _cache

_cache: object

Type declaration

_isViewBase

_isViewBase: boolean

Private _length

_length: number

Private _loadSize

_loadSize: number

Gets or sets load size for the virtual array.

Private _loadedIndexes

_loadedIndexes: number[]

Private _requestedIndexes

_requestedIndexes: number[]

Static changeEvent

changeEvent: string

String value used when hooking to change event.

Static itemsLoadingEvent

itemsLoadingEvent: string

String value used when hooking to itemsLoading event.

Static propertyChangeEvent

propertyChangeEvent: string

Accessors

length

  • get (): number
  • set (value: number): void

loadSize

  • get (): number
  • set (value: number): void

Methods

_createPropertyChangeData

  • _createPropertyChangeData(propertyName: string, value: any, oldValue?: any): PropertyChangeData

_emit

  • _emit(eventNames: string): void

addEventListener

  • addEventListener(eventNames: string, callback: function, thisArg?: any): void

get

  • get(name: string): any

getItem

  • getItem(index: number): T

hasListeners

  • hasListeners(eventName: string): boolean

load

  • load(index: number, items: T[]): void

notify

  • notify<T>(data: T): void

notifyPropertyChange

  • notifyPropertyChange(name: string, value: any, oldValue?: any): void

off

  • off(eventNames: string, callback?: any, thisArg?: any): void

on

  • on(eventNames: string, callback: function, thisArg?: any): void
  • on(event: "itemsLoading", callback: function, thisArg?: any): void
  • on(event: "change", callback: function, thisArg?: any): void

  • A basic method signature to hook an event listener (shortcut alias to the addEventListener method).

    Parameters

    • eventNames: string

      String corresponding to events (e.g. "propertyChange"). Optionally could be used more events separated by , (e.g. "propertyChange", "change").

    • callback: function

      Callback function which will be executed when event is raised.

    • Optional thisArg: any

      An optional parameter which will be used as this context for callback execution.

    Returns void

  • Raised when still not loaded items are requested.

    Parameters

    • event: "itemsLoading"
    • callback: function
    • Optional thisArg: any

    Returns void

  • Raised when a change occurs.

    Parameters

    • event: "change"
    • callback: function
    • Optional thisArg: any

    Returns void

once

  • once(event: string, callback: function, thisArg?: any): void

removeEventListener

  • removeEventListener(eventNames: string, callback?: any, thisArg?: any): void

Private requestItems

  • requestItems(index: number): void

set

  • set(name: string, value: any): void

setItem

  • setItem(index: number, value: T): void

setProperty

  • setProperty(name: string, value: any): void

Static addEventListener

  • addEventListener(eventName: string, callback: any, thisArg?: any): void

Static off

  • off(eventName: string, callback?: any, thisArg?: any): void

Static on

  • on(eventName: string, callback: any, thisArg?: any): void

Static once

  • once(eventName: string, callback: any, thisArg?: any): void

Static removeEventListener

  • removeEventListener(eventName: string, callback?: any, thisArg?: any): void

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