[Lazarus] A change in LCL require your TCustomForm descendants to have a resource or to use a CreateNew constructor

Mattias Gaertner nc-gaertnma at netcologne.de
Wed Feb 2 15:29:32 CET 2011


 
 

michael.vancanneyt at wisa.be hat am 2. Februar 2011 um 11:49 geschrieben:

>
>
> On Wed, 2 Feb 2011, Paul Ishenin wrote:
>
> > Hello, Lazarus mailing list.
> >
> > I've changed the behavior of TCustomForm.Create constructor. Now it raises
> > an
> > exception if your TCustomForm descendant has no resource.
> >
> >
> > The behavior is controlled by a global variable *RequireDerivedFormResource*
> > which is set to True for all new applications created by the IDE and is set
> > to False by default. If you for some reason want the old behavior just
> > remove
> > "RequireDerivedFormResource := True" line from .lpr file of your new
> > application.
>
> I think you should do the opposite: The default should be 'True', and users
> should disable this explicitly. 
This would break existing projects without need.
 
 

> That would also be Delphi compatible. 
That's why it is enabled for new projects. Don't forget this is just a warning
that something might be missing. It is not a necessary bug fix.
 
 

> There is one caveat: The TForm class itself should not search for a resource,
> only TForm Descendants should do this.
Huh?
That was always so.


Mattias
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