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

TCollectionItem

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

Basic object that is managed by a TCollectionclass.

Declaration

Source position: classesh.inc line 345

type TCollectionItem = class(TPersistent)

public

  constructor Create(); virtual;

  

Creates a new instance of this collection item.

  destructor Destroy; override;

  

Destroyes this collection item.

  property Collection: TCollection; [rw]

  

Pointer to the collection managing this item.

  property ID: Integer; [r]

  

Initial index of this item.

  property Index: Integer; [rw]

  

Index of the item in its managing collection TCollection.Itemsproperty.

  property DisplayName: String; [rw]

  

Name of the item, displayed in the object inspector.

end;

Inheritance

TCollectionItem

  

Basic object that is managed by a TCollectionclass.

|

TPersistent

  

Base class for streaming system and persistent properties.

|

TObject

Description

TCollectionItemand TCollectionform a pair of base classes that manage a collection of named objects. The TCollectionItemis the named object that is managed, it represents one item in the collection. An item in the collection is represented by two properties: TCollectionItem.DisplayName, TCollection.Indexand TCollectionItem.ID.

A TCollectionItemobject is never created directly. To manage a set of named items, it is necessary to make a descendent of TCollectionItemto which needed properties and methods are added. This descendant can then be managed with a TCollectionclass. The managing collection will create and destroy it's items by itself, it should therefore never be necessary to create TCollectionItemdescendents manually.

See also

TCollection

  

Base class to manage collections of named objects.