[Gvsig_english] Eclipse RCP with gvSIG

Thu Apr 7 13:35:33 CEST 2011

Dear Jordi,

thank you for your suggestion. My job is just to build a working prototype in Eclipse RCP. Other people will rack their brains for license issues :-) I will tell them regarding these obscurities.

With best regards
Tobias

-----Ursprüngliche Nachricht-----
Von: gvsig_internacional-bounces at listserv.gva.es im Auftrag von Jordi Torres
Gesendet: Do 07.04.2011 13:22
An: Users and Developers mailing list
Betreff: Re: [Gvsig_english] Eclipse RCP with gvSIG

Hi Juan Lucas,

I believe you are rigth, Tobias is able to distribute a plugin, that way he
is not mixing GPL code with EPL code, is the final user who do that.
My intention was only to advice Tobias to be careful with license
incompatibilities.

Cheers.

2011/4/7 Juan Lucas Domínguez Rubio <juan_lucas_dr at yahoo.com>

> Hello,
> If I understood it well, it's not legally possible to distribute a "tuned"
> version of Eclipse where you have added GNU/GPL code, but it is possible to
> distribute an Eclipse plugin under the GNU/GPL licence.
>
> So Tobias could create and distrubute a "gvSIG mapping plugin" for Eclipse.
>
> Is this correct?
>
>
> Regards,
>
> Juan Lucas Domínguez Rubio
> http://gvsigmobileonopenmoko.wordpress.com
> http://tellusproject.blogspot.com
>
> --- On *Thu, 4/7/11, Jordi Torres <jtorresfabra at gmail.com>* wrote:
>
>
> From: Jordi Torres <jtorresfabra at gmail.com>
> Subject: Re: [Gvsig_english] Eclipse RCP with gvSIG
> To: "Users and Developers mailing list" <
> gvsig_internacional at listserv.gva.es>
> Date: Thursday, April 7, 2011, 12:08 PM
>
>
> Hi Tobias,
>
> Maybe off-topic, but you may have license conflicts between EPL and
> GNU/GPL.
>
> Cheers.
>
> 2011/4/7 Juan Lucas Domínguez Rubio <juan_lucas_dr at yahoo.com<http://mc/compose?to=juan_lucas_dr@yahoo.com>
> >
>
> Hello, Tobias:
>
> I don't have much experience in 'improper' integration between gvSIG and
> Eclipse SWT (I mean, things like embedding AWT controls in a SWT context or
> using some kind of library wrapping), but I have done some tests regarding
> gvSIG libraries in a SWT context.
>
> As you perhaps know, the application gvSIG Mobile is using a simplified
> version of gvSIG 1.X mapping libraries.
>
> I wrote a little 'unofficial' version of gvSIG Mobile for Linux devices
> (such as the Openmoko phone or the Nokia N810 tablet) with less
> functionalities than the 'official' gvSIG Mobile but including some other
> new features.
>
> At that time, I found no JVM for those devices that could use the AWT
> classes (used by gvSIG and gvSIG Mobile). Instead, the Eclipse SWT library
> was working fine on them, so I changed the gvSIG mapping libraries to make
> them graphic context independent, and then reimplemented the needed classes
> to use Eclipse SWT classes. Essentially, I did this:
>
> - Take the mapping library of gvSIG 1.X (libFMap) and replace all the
> occurrences of the classes Graphics2D and Image (this includes all the
> BufferedImage), with some Java interfaces created by you. So, for ecample in
> the FLyrVect class, instead of:
>
> public void draw(Graphics g, ViewPort vp) throws FMapDriverException { ...
> }
>
> you will have:
>
> public void draw(IGraphics g, ViewPort vp) throws FMapDriverException { ...
> }
> (IGraphics is a new Java interface)
>
> Before doing this, I removed a lot of drivers from libFMap which were not
> interesting. I also applied this transformation to the WMS driver and added
> it to my workspace.
>
> - create a new Java project with those Java interfaces (the new libFMap
> will depend on this project)
>
> - create another Java project containing an implementation of those Java
> interfaces. Here is where you would use the SWT library to implement all the
> needed methods (such as drawing a line, creating an image, pasting an image
> on a graphic context, etc.)
>
> - then, at the beginning of the application, you create a SWT-based factory
> that is able to instantiate all those SWT-based graphic resources and
> methods, and use it across the application.
>
> There are a lot of other important things I had to do from scratch, for
> example the table of contents (TOC) and of course all the GUI (dialogs). I
> also split the libFMap project in different parts (libGeom, libRender, etc).
> This was the resulting workspace:
>
> https://svn.prodevelop.es/public/labs/gvsigmobileonopenmoko/trunk/
>
> and these are a couple screenshots of the aplication:
>
> http://gvsigmobileonopenmoko.files.wordpress.com/2009/04/carta_2007.jpg
> (WMS layer + 2 little shapefiles)
>
> http://gvsigmobileonopenmoko.files.wordpress.com/2009/07/nokia_31468.jpg
> (ArcIMS layer)
>
> I have never done it myself, but I presume in the Eclipse RCP-based
> applications you eventually will have to use the SWT graphic classes I used,
> especially:
>
> org.eclipse.swt.graphics.GC
> org.eclipse.swt.graphics.Image
>
> So that would be one way to properly integrate gvSIG in the Eclipse RCP
> platform.
>
> After my little experience, I think that the Eclipse SWT graphic context is
> less powerful and slower than the AWT Graphics2D class. I did not
> investigate it deeply but I think AWT has better access to the device's
> graphic hardware capabilities and therefore drawing is faster and more
> flexible.
>
>
> Regards,
>
> Juan Lucas Domínguez Rubio
> http://gvsigmobileonopenmoko.wordpress.com
> http:// <http://gvsigmobileonopenmoko.wordpress.com/>foss4gis.blogspot.com<http://tellusproject.blogspot.com>
>
> --- On *Wed, 4/6/11, Neumann, Tobias <tobias.neumann at berner-mattner.com<http://mc/compose?to=tobias.neumann@berner-mattner.com>
> >* wrote:
>
>
> From: Neumann, Tobias <tobias.neumann at berner-mattner.com<http://mc/compose?to=tobias.neumann@berner-mattner.com>
> >
> Subject: [Gvsig_english] Eclipse RCP with gvSIG
> To: gvsig_internacional at listserv.gva.es<http://mc/compose?to=gvsig_internacional@listserv.gva.es>
> Date: Wednesday, April 6, 2011, 7:35 AM
>
>
> Hello,
>
> I am interested in your experiences with the gvSIG software embedded in
> Eclipse RCP. I want to start up a project using these technologies. Anyone
> did this before? Are there some points I have to focus on?
>
> Thank you very much!
>
> Best regards,
> Tobias
>
>
>
> Tobias Neumann, M.Sc. in Geogr.
> Softwareingenieur
>
> Tel: +49 89 608090-276
> Fax: +49 89 6098182
> E-Mail: Tobias.Neumann at berner-mattner.com<http://mc/compose?to=Tobias.Neumann@berner-mattner.com>
> Web: www.berner-mattner.com
>
> Berner & Mattner Systemtechnik GmbH
> Erwin-von-Kreibig-Str. 3
> D-80807 München
>
> Geschäftsführer: Hans Berner, Dr. Klaus Eder, Dr. Jan-Oliver Wenzel
> Registernummer: HR B 83252 beim Amtsgericht München
> Sitz der Gesellschaft: München
>
>
>
>
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> --
> Jordi Torres Fabra
>
> gvSIG 3D blog
> http://gvsig3d.blogspot.com
> Instituto de Automática e Informática Industrial
> http://www.ai2.upv.es
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-- 
Jordi Torres Fabra

gvSIG 3D blog
http://gvsig3d.blogspot.com
Instituto de Automática e Informática Industrial
http://www.ai2.upv.es

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