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[Properties (by Name)] [Methods (by Name)] [Events (by Name)]
Link between actions and action clients (e.g. controls)
Source position: classesh.inc line 2002
type TBasicActionLink = class(TObject) |
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public |
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constructor Create(); virtual; |
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Creates a new instance of the TBasicActionLink class |
destructor Destroy; override; |
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Destroys the TBasicActionLink instance. |
function Execute(); virtual; |
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Calls the action's Execute method. |
function Update; virtual; |
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Calls the action's Update method |
property Action: TBasicAction; [rw] |
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The action to which the link was assigned. |
property OnChange: TNotifyEvent; [rw] |
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Event handler triggered when the action's properties change |
end; |
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Link between actions and action clients (e.g. controls) |
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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 descendants of TBasicActionLink which communicate changes in the action to the component.
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Abstract base class for all Actions. |