Hello, Tobias.
I have realized that there is a big difference between the JVM I used in the 
mobile devices and the JVM you are going to use: in my case, the AWT classes 
simply were not available, but in your case the classes will be available but 
will not integrate easily in the Eclipse SWT context.

So one possible way to integrate gvSIG in the Eclipse RCP application is 
drawing the map in a AWT image (for example BufferedImage) and then convert the 
image into a SWT image (I'm sure this is easy and fast) and paste it in you 
Eclipse SWT canvas. In this way you will probably be able to re-use the gvSIG 
libraries easily.

Just an idea...


Regards,
Juan Lucas Domínguez Rubio
---
Prodevelop SL, Valencia (España)
Tlf.: 96.351.06.12 -- Fax: 96.351.09.68
http://www.prodevelop.es <http://www.prodevelop.es/>
---

________________________________

De: [email protected] en nombre de Neumann, Tobias
Enviado el: jue 07/04/2011 12:53
Para: Users and Developers mailing list
Asunto: AW: [Gvsig_english] Eclipse RCP with gvSIG



Hola César y Juan! :-)

Thanks a lot for your thoughts and experiences. I believe the combination of 
gvSIG and RCP will matter a couple of hours of work for me :o)

I am just starting up with gvSIG and will investigate what will be necessary to 
satisfy our needs. Unfortunately we do not have the choice to match our 
requirements without Eclipse RCP. I will tell you about my improvements.

With best regards
Tobias



-----Ursprüngliche Nachricht-----
Von: [email protected] im Auftrag von Juan Lucas 
Domínguez Rubio
Gesendet: Do 07.04.2011 12:01
An: Users and Developers mailing list
Betreff: Re: [Gvsig_english] Eclipse RCP with gvSIG

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://gvsigmobileonopenmoko.wordpress.com/>
http://foss4gis.blogspot.com <http://foss4gis.blogspot.com/>

--- On Wed, 4/6/11, Neumann, Tobias <[email protected]> wrote:

From: Neumann, Tobias <[email protected]>
Subject: [Gvsig_english] Eclipse RCP with gvSIG
To: [email protected]
Date: Wednesday, April 6, 2011, 7:35 AM






Eclipse RCP with gvSIG
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: [email protected]

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Berner & Mattner Systemtechnik GmbH

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