Unit 'Variants' Package
[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] [#rtl]

TInvokeableVariantType

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

TCustomVariantType descendent that implements DispInvoke.

Declaration

Source position: variants.pp line 226

type TInvokeableVariantType = class(TCustomVariantType,IVarInvokeable)

public

  function DoFunction(); virtual;

  

Empty stub for IVarInvokeable.DoFunction, to be implemented in descendents.

  function DoProcedure(); virtual;

  

Empty stub for IVarInvokeable.DoProcedure, to be implemented in descendents.

  function GetProperty(); virtual;

  

Empty stub for IVarInvokeable.GetProperty, to be implemented in descendents.

  function SetProperty(); virtual;

  

Empty stub for IVarInvokeable.SetProperty, to be implemented in descendents.

end;

Inheritance

TInvokeableVariantType

  

TCustomVariantType descendent that implements DispInvoke.

|

TCustomVariantType,IVarInvokeable

  

Base class for a custom variant type.

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TObject,IInterface

  

Base class of all classes.

Description

TInvokeableVariantType is a TCustomVariantType descendent which implements the TCustomVariantType.DispInvoke method. It translates the DispInvoke" method to calls to one or more of the four methods of IVarInvokeable: DoFunction or DoProcedure for method calls (DISPATCH_METHOD) and GetProperty for property reading (DISPATCH_PROPERTYGET) or SetProperty for property writing (DISPATCH_PROPERTYSET). Other combinations are possible. It has empty stubs for these methods, which must be implemented in a descendent that is used to describe a custom variant.

See also

IVarInvokeable.DoFunction

  

Called for methods that return a result (functions).

IVarInvokeable.DoProcedure

  

Called for methods that do not return a result (procedures).

IVarInvokeable.GetProperty

  

Called when a property must be read.

IVarInvokeable.SetProperty

  

Called when a property must be set.


Documentation generated on: Jul 24 2023