[Lazarus] Difference between Delphi 2010 / Lazarus

[Mattias Gaertner]

On Fri, 14 Dec 2012 11:30:31 +0100 (CET)
michael.vancanneyt at wisa.be wrote:

> 
> 
> On Fri, 14 Dec 2012, Jorge Gonçalves wrote:
> 
> >>
> >> What does "Calculated" do?
> >>>
> >>
> >> Judging from the Delphi code, it is no longer used. The GetCalculated
> >> returns
> >>
> >>
> > Yes i know.
> > The problem surges when we read the dfm. The reader will give one exception
> > that the property is unknown.
> > If we try to remove the property from the file, Delphi will introduce them
> > again, next time we edit the datamoudule.
> 
> You can install an unknown property event handler in TReader: OnPropertyNotFound
> 
> But that requires that you are able to choose which reader is used, because
> now you cannot: I've long wanted to install a hook so you can select which 
> reader/writer is used in TStream.ReadComponent.
> 
> Maybe the lazarus implementation offers a hook ?

Maybe you mean in unit lresources.pp:
  LRSObjectReaderClass: TLRSObjectReaderClass=TLRSObjectReader;
  LRSObjectWriterClass: TLRSObjectWriterClass=TLRSObjectWriter;

Mattias