TBasicActionLink¶

Link between actions and action clients (e.g. controls).

Declaration¶

Source position: classesh.inc line 2741

type

  TBasicActionLink = class(TObject)
  public
    constructor Create;
    destructor Destroy;
    function Execute : Boolean;
    function Update : Boolean;
    property Action: TBasicAction; {rw}
    property OnChange: TNotifyEvent; {rw}
  end;

Inheritance¶

Description¶

TBasicActionLink links an Action to its clients. With each client for an action, a TBasicActionLink class is instantiated to handle the communication between the action and the client. It passes events between the action and its clients, and thus presents the action with a uniform interface to the clients.

An application programmer should never use a TBasicActionLink instance directly; They are created automatically when an action is associated with a component. Component programmers should create specialized descendants of TBasicActionLink which communicate changes in the action to the component.

Properties¶

Member	Visibility	Description
Action	public	The action to which the link was assigned.

See all Properties

Methods¶

Member	Visibility	Description
Create	public	Creates a new instance of the TBasicActionLink class.
Destroy	public	Destroys the TBasicActionLink instance.
Execute	public	Calls the action's Execute method.
Update	public	Calls the action's Update method.

See all Methods

Events¶

Member	Visibility	Description
OnChange	public	Event handler triggered when the action's properties change.

See all Events