TInvokeableVariantType

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TCustomVariantType descendent that implements DispInvoke

Declaration

Source position: variants.pp line 226

Type
  TInvokeableVariantType = class (TCustomVariantType, IVarInvokeable)
  protected
    procedure DispInvoke(Dest: pvardata; var Source: tvardata; 
                        CallDesc: pcalldesc; Params: Pointer);  Override;
  public
    function DoFunction(var Dest: tvardata; const V: tvardata; 
                       const Name: string; const Arguments: TVarDataArray)
                        : Boolean;  Virtual;
    function DoProcedure(const V: tvardata; const Name: string; 
                        const Arguments: TVarDataArray) : Boolean;  Virtual;
    function GetProperty(var Dest: tvardata; const V: tvardata; 
                        const Name: string) : Boolean;  Virtual;
    function SetProperty(var V: tvardata; const Name: string; 
                        const Value: tvardata) : Boolean;  Virtual;
  end
  ;

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.

Members

Member	Type	Visibility	Description
DispInvoke	Method	protected
DoFunction	Method	public	Empty stub for IVarInvokeable.DoFunction, to be implemented in descendents
DoProcedure	Method	public	Empty stub for IVarInvokeable.DoProcedure, to be implemented in descendents
GetProperty	Method	public	Empty stub for IVarInvokeable.GetProperty, to be implemented in descendents
SetProperty	Method	public	Empty stub for IVarInvokeable.SetProperty, to be implemented in descendents

Inheritance

Class	Description
TInvokeableVariantType(IVarInvokeable)	TCustomVariantType descendent that implements DispInvoke

See also

Name	Description
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

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