Re: [dsdp-ercp-dev] (e)SWT on maemo

[Sebastian Mancke <s.mancke@xxxxxxxxx>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi.

Gorkem Ercan schrieb:
> Funny, I have been asked the same question when I was doing my early
> eRCP prototyping on N800. By the way I have used parts of jalimo for
> that proto.
Nice.

> You are correct, maemo based devices tend to have more power and touch
> so as a result, the full SWT implementation works. Although I still want
> to run benchmarks to see that performance difference is not significant
> if any. But since it is geared towards devices, we will happily make
> changes in the eSWT implementation to overcome any mobile specific
> perfomance problem points that may be encountered in the future.
> As Mark pointed out eSWT will have a lower memory footprint because it
> is a subset of the SWT and omits parts of SWT that is not absolutely
> necessary for most of the mobile applications, I think memory resource
> limitations is valid for maemo devices as well.
Well, the RAM consumption is an important point, whereby the footprint
"on disk" does not matter that much for me and is already ok for SWT
(~1.4M).

> The real benefit of the eSWT is it enables applications that are more
> usable on mobile devices. It provides controls that have input
> optimization and control of input methods that is not likely to be
> addressed with SWT. Also eSWT APIs allows discovery and control of
> device capabilities. These are really important improvements in addition
> to SWT and are constantly improved by the participation of the industry.
> 
> It will be great if jalimo at one point can include eRCP at one point (
> full RCP is heavy for devices without too many benefits). eRCP will run
> on standard SWT to some extend. But in order to have full compatibility
> with other platforms we need eSWTs mobile extensions at least. One way
> could be to have full SWT and Mobile extension but that may be heavy on
> the memory usage and needs to be investigated further.
> 
> I would like to see eRCP and eSWT as part of Jalimo, if you have any
> more questions/suggestions how we can further collaborate please ask.

eRCP: since this is all pure java and our runtime is mostly java 1.5
compatible, it should be a packaging issue, right. We have not made the
decision, how to handle external pure java libraries, yet. (e.g. wrap
upstream .jar files in a distribution archive, or build everything from
scratch). The best way for a jalimo integration would be to build eSWT
completely with OpenEmbedded.

Mobile extensions: This is a good point. Since all mobile platforms are
going into different directions to increase the usability (especially
maemo with hildon) it would be worth a lot to cover those benefits in
one Api. Although, I'm not sure, if this is realy a mobile issue or if
it targets desktop integration in general?
When I took a look at the mobile extensions JavaDoc, I found much
things, which would be perfectly map to the hildon desktop. But I don't
want to miss the possibility to run the same code on my Desktop. Are
there pears with a default mapping available, which map this mobile
extensions to normal (e)SWT, running on every platform? Such pears would
be a good starting point for new ports.

Regards,
  Sebastian

> -- 
> Gorkem
> 
> 
> 
> 
> 
> 
> 
> Sebastian Mancke wrote:
> Hi,
> 
> we are featuring a project called Jalimo, which has the goal to provide
> a complete free Java stack for mobile and embedded linux devices.
> Currently our main targets are maemo and openmoko. See [1] for further
> details.
> 
> For the GUI solution we use SWT at the moment (among others) we will
> investigate more in this direction, especially to get a better desktop
> integration, in the near future.
> 
> Since our target devices are powerful, and we are trying to align the
> platform capabilities on the desktop, a full SWT seems to fit very well
> on this. Recently I found a blog post from Gorkem [2], who has started
> an eSWT/eRCP implementation. I never worked with the *e* variant. What
> would be the benefits from that? Would it be possible so run the eRCP
> libs together with an full blown SWT?
> 
> Regards,
>   Sebastian
> 
> [1] http://www.jalimo.org
> [2]
> http://gorkem-ercan.blogspot.com/2007/11/ercp-running-on-n800-internet-tablet.html
> 
> 
_______________________________________________
dsdp-ercp-dev mailing list
dsdp-ercp-dev@xxxxxxxxxxx
https://dev.eclipse.org/mailman/listinfo/dsdp-ercp-dev

> _______________________________________________
> dsdp-ercp-dev mailing list
> dsdp-ercp-dev@xxxxxxxxxxx
> https://dev.eclipse.org/mailman/listinfo/dsdp-ercp-dev

- --
tarent Gesellschaft für Softwareentwicklung und IT-Beratung mbH

Heilsbachstr. 24, 53123 Bonn    | Poststr. 4-5, 10178 Berlin
fon: +49(228) / 52675-0         | fon: +49(30) / 27594853
fax: +49(228) / 52675-25        | fax: +49(30) / 78709617
durchwahl: +49(228) / 52675-17  | mobil: +49(171) / 7673249

Geschäftsführer:
Boris Esser, Elmar Geese, Thomas Müller-Ackermann
HRB AG Bonn 5168
Ust-ID: DE122264941
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFHU/FtsMJ2Yk81wE0RAgsBAKCkK6GrPALXWX0/0P/hHp7cN5kHPgCdGb3c
5ouK2tQcoNeF9VGnZTxmdUs=
=+8jU
-----END PGP SIGNATURE-----