[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'Classes' (#rtl)

TCollection

[Properties (by Name)] [Methods (by Name)] [Events (by Name)]

Base class to manage collections of named objects.

Declaration

Source position: classesh.inc line 522

type TCollection = class(TPersistent)

public

  constructor Create();

  

Creates a new collection.

  destructor Destroy; override;

  

Destroys the collection and frees all the objects it manages.

  function Owner;

  

Owner of the collection.

  function Add;

  

Creates and adds a new item to the collection.

  procedure Assign(); override;

  

Assigns one collection to another.

  procedure BeginUpdate; virtual;

  

Start an update batch.

  procedure Clear;

  

Removes all items from the collection.

  procedure EndUpdate; virtual;

  

Ends an update batch.

  procedure Delete();

  

Delete an item from the collection.

  function GetEnumerator;

  

Create an IEnumerator instance

  function GetNamePath; override;

  

Overrides TPersistent.GetNamePath to return a proper pathname.

  function Insert();

  

Insert an item in the collection.

  function FindItemID();

  

Searches for an Item in the collection, based on its TCollectionItem.ID property.

  procedure Exchange();

  

Exchange 2 items in the collection

  procedure Move();

  procedure Sort();

  

Sort the items in the collection

  property Count: Integer; [r]

  

Number of items in the collection.

  property ItemClass: TCollectionItemClass; [r]

  

Class pointer for each item in the collection.

  property Items []: TCollectionItem; [rw]

  

Indexed array of items in the collection.

end;

Inheritance

TCollection

  

Base class to manage collections of named objects.

|

TPersistent,IFPObserved

  

Base class for streaming system and persistent properties.

|

TObject

  

Base class of all classes.

Description

TCollection implements functionality to manage a collection of named objects. Each of these objects needs to be a descendant of the TCollectionItem class. Exactly which type of object is managed can be seen from the TCollection.ItemClass property.

Normally, no TCollection is created directly. Instead, a descendants of TCollection and TCollectionItem are created as a pair.

See also

TCollectionItem

  

Basic object that is managed by a TCollection class.


Documentation generated on: May 14 2021