On Wed, 29 Nov 2006, Mattias Gaertner wrote:
> On Tue, 28 Nov 2006 23:50:09 +0100
> Marc Weustink <[EMAIL PROTECTED]> wrote:
>
> > [EMAIL PROTECTED] wrote:
> > >> [EMAIL PROTECTED] wrote:
> > >>>>> Normally when using the package (jpegforlazarus or
> > >>>> images4lazarus), the
> > >>>>> IDE adds the unit to program source and thus the lazjpeg unit
> > >> is
> > >>>> used.
> > >>>> Now we are at the topic, last weekend I was demonstrating with a
> > >>>> jpeg in
> > >>>> a TPicture. When loading the image in the IDE, the *.jpg fiter
> > >>>> wasn't
> > >>>> there. However, when filtering for all files, selecting a .jpg
> > >>>> worked.
> > >>>> It's preview was shown. The image on the form was also shown.
> > >>>> However,
> > >>>> the compiled exe didn't show the image.
> > >>> If you want to see the image you need to use ene of the images
> > >> packages mentioned before in your application. The default lazarus
> > >> win32 install had that package and can therefore show it.
> > >>
> > >> mm.... as an ordinary user, I don't think I find that logical.
> > >> IMO there is no difference between a bmp and a jpg. Where both
> > >> were shown in the IDE and only the first worked as expected.
> > >
> > > So, add one of the images packages to the default application?
> >
> > Maybe a more generic thing. I think it counts for all code used from a
> > package. Add the package to the project depencencies the moment it is
> > used. I think this also counts for cotrols defined in a package for
> > instance.
>
> Control classes are registered with packages. Picture formats are not.
> How does Delphi do it?
Picture formats are registered by including a unit that contains the support.
If you add this unit to a package and install the package in the IDE, the IDE
will 'know' the format.
Michael.
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