RAD Studio VCL Reference
TActionLink.IsVisibleLinked Method

Indicates whether the Visible properties for the action and client are linked.

function IsVisibleLinked: Boolean; virtual;
virtual __fastcall Boolean IsVisibleLinked();

TActionLink descendants call IsVisibleLinked to determine whether they need to propagate changes to the Visible property of the action so that they are reflected by the client object. When IsVisibleLinked returns true, the action controls the Visible property: Changes to the Visible property of the action are reflected by changes to the corresponding property of the client object. When IsVisibleLinked returns false, the client object does not reflect the Visible property of its action, either because it does not have a corresponding property, or, more commonly, because it manages the value of its corresponding property independently. 

As implemented in TActionLink, IsVisibleLinked merely checks that the Action property specifies a descendant of TCustomAction (that is, it is an action that has a Visible property). Descendant classes override IsVisibleLinked to determine whether the Visible property is linked with the appropriate client property. 


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