Re: [UOPL-Architect] how design uopl gui applications
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Re: [UOPL-Architect] how design uopl gui applications
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From: Thomas M. <tm...@bs...> - 2004-12-07 19:31:03
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Dennis Landi wrote: >Can anyone tell me if these declarations > >TComponent = class(TPersistent, IInterface, IInterfaceComponentReference) > > Yes >and > >TInterfacedPersistent = class(TPersistent, IInterface) > > Yes > >- 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 >>>>> >>>>> >>>>> >>>>> >>>>>------------------------------------------------------- >>>>>SF email is sponsored by - The IT Product Guide >>>>>Read honest & candid reviews on hundreds of IT Products from real >>>>> >>>>> >>users. >> >> >>>>>Discover which products truly live up to the hype. Start reading now. >>>>>http://productguide.itmanagersjournal.com/ >>>>>_______________________________________________ >>>>>UOPL-architect mailing list >>>>>UOP...@li... >>>>>https://lists.sourceforge.net/lists/listinfo/uopl-architect >>>>> >>>>> >>>>> >>>>> >>>>> >>>>-- >>>>Thomas Miller >>>>Wash DC Delphi SIG Chairperson >>>>Delphi Client/Server Certified Developer >>>>BSS Accounting & Distribution Software >>>>BSS Enterprise Accounting FrameWork >>>> >>>>http://www.bss-software.com >>>>http://www.cpcug.org/user/delphi/index.html >>>>https://sourceforge.net/projects/uopl/ >>>>http://sourceforge.net/projects/dbexpressplus >>>> >>>> >>>> >>>> >>>>------------------------------------------------------- >>>>SF email is sponsored by - The IT Product Guide >>>>Read honest & candid reviews on hundreds of IT Products from real >>>> >>>> >users. > > >>>>Discover which products truly live up to the hype. Start reading now. >>>>http://productguide.itmanagersjournal.com/ >>>>_______________________________________________ >>>>UOPL-architect mailing list >>>>UOP...@li... >>>>https://lists.sourceforge.net/lists/listinfo/uopl-architect >>>> >>>> >>> >>> >>>------------------------------------------------------- >>>SF email is sponsored by - The IT Product Guide >>>Read honest & candid reviews on hundreds of IT Products from real users. >>>Discover which products truly live up to the hype. Start reading now. >>>http://productguide.itmanagersjournal.com/ >>>_______________________________________________ >>>UOPL-architect mailing list >>>UOP...@li... >>>https://lists.sourceforge.net/lists/listinfo/uopl-architect >>> >>> >> >> >>------------------------------------------------------- >>SF email is sponsored by - The IT Product Guide >>Read honest & candid reviews on hundreds of IT Products from real users. >>Discover which products truly live up to the hype. Start reading now. >>http://productguide.itmanagersjournal.com/ >>_______________________________________________ >>UOPL-architect mailing list >>UOP...@li... >>https://lists.sourceforge.net/lists/listinfo/uopl-architect >> >> > > > > >------------------------------------------------------- >SF email is sponsored by - The IT Product Guide >Read honest & candid reviews on hundreds of IT Products from real users. >Discover which products truly live up to the hype. Start reading now. >http://productguide.itmanagersjournal.com/ >_______________________________________________ >UOPL-architect mailing list >UOP...@li... >https://lists.sourceforge.net/lists/listinfo/uopl-architect > > > -- Thomas Miller Wash DC Delphi SIG Chairperson Delphi Client/Server Certified Developer BSS Accounting & Distribution Software BSS Enterprise Accounting FrameWork http://www.bss-software.com http://www.cpcug.org/user/delphi/index.html https://sourceforge.net/projects/uopl/ http://sourceforge.net/projects/dbexpressplus |
