On Wed, 17 Aug 2005 19:41:48 +0200 (CEST)
Michael Van Canneyt <[EMAIL PROTECTED]> wrote:
>
>
> On Wed, 17 Aug 2005, Mattias Gaertner wrote:
>
> > On Wed, 17 Aug 2005 18:50:12 +0200
> > Marc Weustink <[EMAIL PROTECTED]> wrote:
> >
> > > Mattias Gaertner wrote:
> > > > On Wed, 17 Aug 2005 15:13:35 +0200 (Romance Daylight Time)
> > > > Michael Van Canneyt <[EMAIL PROTECTED]> wrote:
> > > >
> > > >
> > > >>
> > > >>On Wed, 17 Aug 2005, Mattias Gaertner wrote:
> > > >>
> > > >>
> > > >>>>>I don't know, why the Screen forms must have separate names, but
> > > >>>>>nevertheless: implemented.
> > > >>>>
> > > >>>>Separate names ????
> > > >>>
> > > >>>Sorry. I meant unique names.
> > > >>>
> > > >>>
> > > >>>
> > > >>>>All created froms are "registered" with the screen object, so it
> > > >knows >>>all forms and thus all names.
> > > >>>
> > > >>>True.
> > > >>>Is there any reason, why all forms must have unique names?
> > > >>
> > > >>No.
> > > >>Only if they are owned by the same owner. So if all forms are owned
> > > >by >Application, they must have different names. This is also true in
> > > >>Delphi, it is a TComponent thing.
> > > >
> > > >
> > > > Hey, wait a minute. That was my point. ;)
> > > > By checking the Screen all forms, independent of their Owner have
> > > > unique names. So, it has nothing to do with TComponent.
> > > > BTW: forms can have any owner and in the given example a form was
> > > > the owner of two other forms.
> > >
> > > Indeed and that didn't work with your first solution. I guess
> > > therefore borland checkes against Screen.Forms (and only during
> > > loading at runtime)
> >
> > Do you mean, it's only a hack?
> > I would have expected, the global uniqueness is because Form names can
> > be used for IPC (COM/RPC/...).
>
> No, I don't think this is the reason.
> The streaming itself is probably the reason, this way Borland can always
> fix a reference of the kind
>
> Datasource=MyDataModule.DataSource;
>
> in a stream, even if the datamodule was created without Application as the
> owner. Datamodules and forms are both added to the Screen instance.
>
> For instance in a service application, this would be so: the service
> datamodules are NOT owned by Forms.Application, but by
> SvcMgr.application; A form would never "find" the datamodule if it looked
> only under forms.application.
Ehm. That's the reason to have a global search function.
This does not explain, why this global search function is used for renaming
forms.
Renamed forms can not be referenced, can they?
If it is only for TComponent, Delphi would simply call Owner.FindComponent.
But it does not. It creates global unique form names. Maybe for Docking
Streaming?
Mattias
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