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    TPersistent

    Base class for streaming system and persistent properties.

    Declaration

    Source position: classesh.inc line 827

    type

  TPersistent = class(TObject, IFPObserved)
  public
    destructor Destroy;
    procedure Assign;
    procedure FPOAttachObserver;
    procedure FPODetachObserver;
    procedure FPONotifyObservers;
    function GetNamePath : string;
  end;

    Inheritance

    Implements: IFPObserved

    Description

    TPersistent is the basic class for the streaming system. Since it is compiled in the {$M+} state, the compiler generates RTTI (Run-Time Type Information) for it and all classes that descend from it. This information can be used to stream all properties of classes.

    It also introduces functionality to assign the contents of 2 classes to each other.

    TPersistent implements the IFPObserved interface for the benefit of descendant classes, but does not call IFPObserved.FPONotifyObservers. Descendants such as TStrings and TCollection and TCollectionItem do use it.

    Methods

    Member Visibility Description
    Assign public Assign the contents of one class to another.
    Destroy public Destroys the TPersistent instance.
    FPOAttachObserver public Add an observer to the list of observers.
    FPODetachObserver public Remove an observer from the list of observers.
    FPONotifyObservers public Notify observers of changes.
    GetNamePath public Returns a string that can be used to identify the class instance.
    See all Methods

    See also

    Name Description
    TComponent Base class for all components that need owner-owned functionality.
    IFPObserved Interface implemented by an object that can be observed.
    TStrings Class to manage arrays or collections of strings.
    TCollection Base class to manage collections of named objects.
    TCollectionItem Basic object that is managed by a TCollection class.