[Lazarus] Should using frames result in duplicate name errors?

[Frank Church]

On 17 November 2010 19:28, Mattias Gaertner <nc-gaertnma at netcologne.de>wrote:

> On Wed, 17 Nov 2010 17:45:01 +0000
> Frank Church <vfclists at gmail.com> wrote:
>
> > I am trying to use frames to create the same element repeatedly on a
> form,
> > but when I copy them in the IDE or create them and set their parents at
> > runtime, I get duplicate name errors. Isn't Lazarus supposed to give them
> > different names.
>
> No.
> The name is needed for reference.
>
>
> >   embFrame1 := TEmbBoothFrame.Create(self);
> >   embFrame1.Parent := Panel10;
> >   embFrame1.lblDestination.Caption := 'XXXXX';
> >
> >   embFrame2 := TEmbBoothFrame.Create(self);
> >   embFrame2.Parent := Panel11;
> >   embFrame2.lblDestination.Caption := 'YYYYY';
> >
> > The above code generates the error:
> >
> > Duplicate name: A component named EmbBoothFrame already exists.
>
> You can set a new name or set it to the empty name:
>   embFrame1 := TEmbBoothFrame.Create(self);
>   embFrame1.Name:='';
>   embFrame1.Parent := Panel11;
>   embFrame1.lblDestination.Caption := 'YYYYY';
>
>
> > Is it possible to get it to set a new name at creation time? On closer
> look
> > it looks like the use of self means it is being attached to the form,
> would Application
> > work much better
> >
> > ie embFrame1 := TEmbBoothFrame.Create(Application)?
> >
> > I tested with Application and it works
> >
> > On the other hand it appears that when I add the frames from the IDE, the
> > duplicate name issue exists.
> >
> > Is it possible to pass the desired name to the Create function in this
> case?
>
> There is a complicated way. But I doubt you really need that.
>
>
> > Are frames the right thing for this or is it templates instead? But I
> can't
> > find templates in the IDE menu or the palette (Lazarus 0.9.28.3).
>
> What is 'this'?
>
>
Because it is the same frame being created from the IDE palette, is it
possible to have the child elements in the frame, having the same name, so
that at runtime if the parent frames have names such as Parent1, Parent2,
Parent3 it possible to write such code as Parent1.Label1.Caption,
Parent2.Label1.Caption etc , ie can Lazarus allow child elements to have
duplicate names at runtime so long as the parents have different names?

I want to attach events to the child elements, but it seems I can only do it
runtime with the Application owning the objects, rather than the form, which
is why I am asking whether templates are better for this, rather than
frames.


Mattias
>
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-- 
Frank Church

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