TBaseListMediator¶

Base mediator for handling lists of observable objects

Declaration¶

Source position: fpobserver.pp line 199

type

  TBaseListMediator = class(TBaseMediator)
  public
    constructor Create;
    destructor Destroy;
    class function CompositeMediator : Boolean;
    procedure ObservedChanged;
    property SelectedObject: TObject; {rw}
  published
    property OnBeforeSetupField: TOnBeforeSetupField; {rw}
  end;

Inheritance¶

Description¶

The TBaseListMediator class extends TBaseMediator to handle collections of objects. It creates individual item mediators for each object in the list and manages their lifecycle automatically.

The subject must be a TObjectList, TList, or TCollection. The mediator responds to list changes by creating, updating, or destroying item mediators as needed. T his class is abstract and must be subclassed to provide specific GUI integration.

Each item in the list is handled by a TListItemMediator instance, allowing individual objects to have their own observer relationships and data binding behavior.

Properties¶

Member	Visibility	Description
SelectedObject	public	Currently selected object in the list

See all Properties

Methods¶

Member	Visibility	Description
CompositeMediator	public	Returns True indicating this is a composite mediator
Create	public	Creates a base list mediator instance
Destroy	public	Destroys the list mediator and all item mediators
ObservedChanged	public	Handles changes in the observed list objects

See all Methods

Events¶

Member	Visibility	Description
OnBeforeSetupField	published	Event for formatting field values in all item mediators

See all Events