TArrayBufIndex¶

Implements an index using an array of record buffers.

Declaration¶

Source position: bufdataset.pas line 305

type

  TArrayBufIndex = class(TBufIndex)
  public
    FRecordArray: Array of Pointer;
    FCurrentRecInd: Integer;
    FLastRecInd: Integer;
    FNeedScroll: Boolean;
    constructor Create;
    function ScrollBackward : TGetResult;
    function ScrollForward : TGetResult;
    function GetCurrent : TGetResult;
    function ScrollFirst : TGetResult;
    procedure ScrollLast;
    procedure SetToFirstRecord;
    procedure SetToLastRecord;
    procedure StoreCurrentRecord;
    procedure RestoreCurrentRecord;
    function CanScrollForward : Boolean;
    procedure DoScrollForward;
    procedure StoreCurrentRecIntoBookmark;
    procedure StoreSpareRecIntoBookmark;
    procedure GotoBookmark;
    procedure InitialiseIndex;
    procedure InitialiseSpareRecord;
    procedure ReleaseSpareRecord;
    procedure BeginUpdate;
    procedure AddRecord;
    procedure InsertRecordBeforeCurrentRecord;
    procedure RemoveRecordFromIndex;
    procedure EndUpdate;
  end;

Inheritance¶

Description¶

TArrayBufIndex is a TBufIndex descendant that implements an index using an array of record buffers. TArrayBufIndex uses an internal member with an array of pointers to the TRecordBuffer data type used for record buffers in the index. TArrayBufIndex provides support for Bookmarks in the dataset using TBufBookmark.

Methods¶

Member	Visibility	Description
AddRecord	public
BeginUpdate	public
CanScrollForward	public
Create	public
DoScrollForward	public
EndUpdate	public
GetCurrent	public
GotoBookmark	public
InitialiseIndex	public
InitialiseSpareRecord	public
InsertRecordBeforeCurrentRecord	public
ReleaseSpareRecord	public
RemoveRecordFromIndex	public
RestoreCurrentRecord	public
ScrollBackward	public
ScrollFirst	public
ScrollForward	public
ScrollLast	public
SetToFirstRecord	public
SetToLastRecord	public
StoreCurrentRecIntoBookmark	public
StoreCurrentRecord	public
StoreSpareRecIntoBookmark	public

See all Methods

Fieldss¶

Member	Visibility	Description
FCurrentRecInd	public
FLastRecInd	public
FNeedScroll	public
FRecordArray	public

See all Fieldss

Name	Description
TBufIndex	Defines the interface used to implement indexes in TBufDataset.
TRecordBuffer
TBufBookmark	Implements a Bookmark for TBufDataset.