TBasicActionLink

[Properties (by Name)] [Methods (by Name)] [Events (by Name)]

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

Declaration

`type TBasicActionLink = class(TObject)`
`protected`
`FAction: TBasicAction;`		The action with which this link is associated
`procedure AssignClient(); virtual;`		Assigns a control (client) to the action link.
`procedure Change; virtual;`		Executed whenever the Action is changed.
`function IsOnExecuteLinked; virtual;`		Returns whether the client has it's OnExecute property linked.
`procedure SetAction(); virtual;`		Sets the action with which the actionlink is associated.
`procedure SetOnExecute(); virtual;`		Assigns the OnExecute handler to the client
`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;`

Inheritance

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

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 descendents of TBasicActionLink which communicate changes in the action to the component.

TBasicActionLink

Declaration

Inheritance

Description

See also