| [Overview][Constants][Types][Classes][Procedures and functions][Variables] | Reference for unit 'Classes' (#rtl) |
[Properties (by Name)] [Methods (by Name)] [Events (by Name)]
Link between actions and action clients (e.g. controls)
Source position: classesh.inc line 1403
type TBasicActionLink = class(TObject) |
||
public |
||
constructor Create(); virtual; |
|
Creates a new instance of the TBasicActionLink class |
destructor Destroy; override; |
|
Destroys the TBasicActionLink instance. |
function Execute(); virtual; |
|
Calls the action's Execute method. |
function Update; virtual; |
|
Calls the action's Update method |
property Action: TBasicAction; [rw] |
|
The action to which the link was assigned. |
property OnChange: TNotifyEvent; [rw] |
|
Event handler triggered when the action's properties change |
end; |
|
Link between actions and action clients (e.g. controls) |
|
| | | ||
TObject |
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 descendents of TBasicActionLink which communicate changes in the action to the component.
|
Abstract base class for all Actions. |
No notes exist for this page yet.