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    Class Data

    The Data object manages and controls multiple Buffer objects.

    It also offers additional features such as calculating indicators (using Indicator) on arbitrary buffers.

    Hierarchy (View Summary)

    Index

    Constructors

    constructor

    Properties

    events?

    Methods

    addListener emit get getBuffer getCandleInfo getIdentifierByIndex getIdentifiers getIndexByIdentifier getIntervalStartIndices getOffsetByIndex isEmpty isUpdating listeners on once removeAllListeners removeListener setMaxListeners zoomSpan guard listenerCount setDefaultMaxListeners

    Constructors

    Properties

    events?: Data_Events

    Phantom data for type inference

    Methods

    • Type Parameters

      • Type extends "update"
      • Callback extends (update: DataTUpdate) => void

      Parameters

      Returns this

      adds a listener to the end of the listeners array for the specified event.

    • returns value of requested config option

      firstIndex first index for which there are values in at least one buffer

      lastIndex last index for which there are values in at least one buffer

      startIndex first index in the current range. can be smaller than firstIndex

      endIndex last index in the current range. can be larger than lastIndex

      Parameters

      • v: "firstIndex" | "lastIndex" | "startIndex" | "endIndex"

      Returns number

    • returns the Buffer object with the specified handle

      Parameters

      • handle: number

        the handle of the requested buffer

      Returns Buffer | null

    • returns the identifier for the specified index

      Parameters

      • index: number

      Returns number

    • returns an array containing all identifiers

      Returns number[]

    • returns the index for the specified identifier

      if there are multiple occurences of the requested identifier, returns the first exact match if there is no exact match, returns the index of the last identifier that is smaller than the requested one

      Parameters

      • identifier: number

      Returns number

    • returns a list of candles that begin at the start of the intervals of size as dictate by the tickT function

      Parameters

      • interval: ESpans

        the size of the interval in milliseconds

      Returns number[]

    • returns the numeric offset for the specified index will only be non-zero if the timestamp at the specified index is not distinct

      offset should be used in combination with the return value of getIdentifierByIndex

      Parameters

      • index: number

        an index

      Returns number

      numeric offset

    • checks if data is empty

      Returns boolean

    • checks if a update is currently active

      Returns boolean

    • Type Parameters

      • Type extends "update"
      • Callback extends (update: DataTUpdate) => void

      Parameters

      Returns this

      adds a one time listener for the event. This listener is invoked only the next time the event is fired, after which it is removed.

    • Type Parameters

      • Type extends "update"

      Parameters

      Returns this

      removes all listeners, or those of the specified event.

    • Parameters

      • maxListeners: number

      Returns this

      by default EventEmitters will print a warning if more than 10 listeners are added for a particular event. This is a useful default which helps finding memory leaks. Obviously not all Emitters should be limited to 10. This function allows that limit to be increased. Set to zero for unlimited.

    • zooms in/out to the specified span

      Parameters

      • startIndex: number

        first index of the new span

      • endIndex: number

        last index of the new span

      Returns boolean

    • Parameters

      • maxListeners: number

      Returns void

      set default amount for limit warning

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