Re: [UOPL-Architect] how design uopl gui applications

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Can anyone tell me if these declarations

TComponent = class(TPersistent, IInterface, IInterfaceComponentReference)

and

TInterfacedPersistent = class(TPersistent, IInterface)


- are also present in Delphi 6?  I don't have D6 installed at the moment.


Dennis Landi
Allied Data, Inc.
800 204 2722
http://www.dennislandi.com


----- Original Message ----- 
From: "Dennis Landi" <de...@de...>
To: <uop...@li...>
Sent: Tuesday, December 07, 2004 1:44 PM
Subject: Re: [UOPL-Architect] how design uopl gui applications


> OK.
>
> I just had a look at the D7 implementations of tInterfacedPersisent and
> tComponent.  There have been quite a few changes since D5.
>
> TComponent and TInterfacedPersistent are declared, respectively:
>
> TComponent = class(TPersistent, IInterface, IInterfaceComponentReference)
>
> and
>
> TInterfacedPersistent = class(TPersistent, IInterface)
>
> The definition of IInterface is
>
>   IInterface = interface
>     ['{00000000-0000-0000-C000-000000000046}']
>     function QueryInterface(const IID: TGUID; out Obj): HResult; stdcall;
>     function _AddRef: Integer; stdcall;
>     function _Release: Integer; stdcall;
>   end;
>
> IOW, both classes have functional parity in regard to the QueryInterface
> functionality (They share IInterface).
>
> We simply need to duplicate these on the FreePascal side. (This is
assuming
> the FP support interfaces at all, otherwise its all moot).
>
> We can leave the choice up to individual developers wether or not to
descend
> from TInterfacedPersistent or TPersistent, we should just alert them to
the
> benefit of using TInterfacedPersistent.  If they descend from tComponent,
> then they automatically get the "IInterface" functionality for free...
>
> So you get all this for free, if you use D7 as the "porting target".
> (Another issue, I suppose).
>
> Dennis Landi
> Allied Data, Inc.
> 800 204 2722
> http://www.dennislandi.com
>
>
>
> ----- Original Message ----- 
> From: "Dennis Landi" <de...@de...>
> To: <uop...@li...>
> Sent: Tuesday, December 07, 2004 1:02 PM
> Subject: Re: [UOPL-Architect] how design uopl gui applications
>
>
> >
> >
> > > True, but I think the point that was trying to be made is that these
> > > private variables often
> > > get surfaced as Public properties.
> >
> > You would do that in descendants.
> >
> > That has nothing to do with the TComponentClass classtype which is the
> > typecast, and all the streaming mechanism sees.
> >
> >
> > Dennis Landi
> > Allied Data, Inc.
> > 800 204 2722
> > http://www.dennislandi.com
> > ----- Original Message ----- 
> > From: "Thomas Miller" <tm...@bs...>
> > To: <uop...@li...>
> > Sent: Tuesday, December 07, 2004 12:24 PM
> > Subject: Re: [UOPL-Architect] how design uopl gui applications
> >
> >
> >   We could have both Owner and
> > > OwnerInterface as
> > > a property or function.
> > >
> > > I think the sooner we work some of these little detail out and can
start
> > > the CVS tree,
> > > the better.  I will continue working on website stuff for you.
> > >
> > > Dennis Landi wrote:
> > >
> > > >>By the way, couldn't we have both an FOwner and FOwnerInterface?
> > > >>
> > > >>
> > > >>
> > > >
> > > >Private fields shouldn't interfere with the RTTI streaming system at
> all.
> > I
> > > >doubt its an issue, but the experiment needs to happen.
> > > >
> > > >Three or four years ago I created my own tInterfacedComponent.  I'll
> see
> > if
> > > >I can find it.
> > > >
> > > >Dennis Landi
> > > >Allied Data, Inc.
> > > >800 204 2722
> > > >http://www.dennislandi.com
> > > >
> > > >
> > > >
> > > >
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> > >
> > > -- 
> > > Thomas Miller
> > > Wash DC Delphi SIG Chairperson
> > > Delphi Client/Server Certified Developer
> > > BSS Accounting & Distribution Software
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