[Qgis-developer] WG: Re: WG: Re: cpp-plugin for QGIS 2.0

Thu Nov 7 01:30:00 PST 2013

Thank you Andreas,

sounds like there is hope for me :-)

Now i feel a bit silly because I can't get the files, i tried this:

Freundliche Grüße aus Leipzig
Susann Schmidt
Softwareentwicklung 

**************************************************************

GFI - Gesellschaft für Informationstechnologie mbH
Philipp-Rosenthal-Straße 9
D-04103 Leipzig
Geschäftsführer: Andreas Richter
Amtsgericht Leipzig HRB 12054
USt.-IdNr.: DE179049354     Steuer-Nr.: 231/109/06412
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Web  www.gfi-gis.de  und  www.themenbrowser.de

----- Forwarded by Susann Schmidt/gfi on 07.11.2013 10:26 -----

Andreas Neumann <a.neumann at carto.net> 
Sent by: qgis-developer-bounces at lists.osgeo.org
07.11.2013 09:48

To
qgis-developer at lists.osgeo.org
cc

Subject
Re: [Qgis-developer] WG: Re:  cpp-plugin for QGIS 2.0

Hi,

Whenever there is a new release you have to link to other qgis core 
libraries (e.g. libqgis_core.so). This explains why 2.1 C++ plugins do 
not work for 2.0 even if the API did not change. You have to compile C++ 
plugins for each major version.

You can get the source code for the 2.0x branch at 
https://github.com/qgis/QGIS/tree/release-2_0

see https://github.com/qgis/QGIS/branches for all the available 
branches.

Andreas

Am 2013-11-07 09:35, schrieb SSchmidt at gfi-gis.de:
> Thanks to Richard and Andreas for their help!
> 
> Why not python? In the last year our company began developing an
> extension for ArcGIS 10 in .Net C#. Our intention is a similar working
> plugin in QGis. For me it was first easier to port the Code to C++.
> Indeed i'm not a save C++-Programmer but from python i don't
> understand anything. And so the decision comes to C++.
> The start over a year ago was not so easy but for Lisboa i could get a
> small testplugin get running. Then i've made an error and get new
> sources from github and my plugin only runs with the weekly masters.
> So sporadically when I added some features to my plugin i get the new
> sources from github and the adequate weekly build to test my plugin.
> So all seems well, I thought I wait for the new Version (2.0 Dufour)
> and then we could have a nice beta-version of our plugin. But now i
> can't get running the plugin in 2.0, only in 2.1 its working. I get no
> error in 2.0, it isn't shown in the pluginlist, not even in red. So i
> don't know the reason. I assumed it was the api break between 1.9 and
> 2.0.
> Maybe i don't have the right proceeding. But how can I get the sources
> of 2.0 to compile my project in VS 2010, from github i get only the
> actual. Is this the fault? I don't know.
> 
> Freundliche Grüße aus Leipzig
>  Susann Schmidt
>  Softwareentwicklung
> 
>  **************************************************************
> 
>  GFI - Gesellschaft für Informationstechnologie mbH
>  Philipp-Rosenthal-Straße 9
>  D-04103 Leipzig
>  Geschäftsführer: Andreas Richter
>  Amtsgericht Leipzig HRB 12054
>  USt.-IdNr.: DE179049354 Steuer-Nr.: 231/109/06412
>  ESRI Solution Partner und ER Mapper Reseller
>  Tel. 0341 961 3310 Fax 0341 961 3311 Mail info at gfi-gis.de
>  Web www.gfi-gis.de und www.themenbrowser.de
> 
> ----- Forwarded by Susann Schmidt/gfi on 07.11.2013 09:02 -----
> 
>  RICHARD DUIVENVOORDE <RDMAILINGS at DUIF.NET>
> 
> 06.11.2013 18:01
> 
> Please respond to
>  richard at duif.net
> 
> To SSchmidt at gfi-gis.de, qgis-developer at lists.osgeo.org
> 
> cc
> 
> Subject Re: [Qgis-developer] cpp-plugin for QGIS 2.0
> 
> On 06-11-13 13:03, SSchmidt at gfi-gis.de wrote:
>  >
>  > Hello,
>  >
>  > now i try my luck here hoping not being ignored :-)
>  >
>  > I want to write a plugin for QGIS 2.0 Dufour in C++. Do I have to
> take
>  > the sources/API from Version 1.8 (Lisboa)? It is right, that the
> actual
>  > API only can be used for the actual Releases(Weekly Master)? In
> this
>  > case I have to download the actual sources and recompile it
> everytime I
>  > want to deploy it?
>  >
>  > Thanks for any suggestions.
> 
>  Hi Susann,
> 
>  Any reason to not write your plugin in python? It is much easier (to
>  start with).
> 
>  But if you want to write a C++ for QGIS 2.0, you will have to program
>  against the 2.0 api:
>  http://qgis.org/api/2.0/
> 
>  Myself I have no experience with writing cpp plugins, and I do not
> think
>  there is very much documentation about it..
>  I found this link:
>  http://hub.qgis.org/wiki/17/Writing_C++_Plugins_%5BNew%5D
>  I tried the plugin_builder.py script which is mentioned there, and
> all
>  was working/building fine (also a nice README). Only the links in the
>  created dialog are not ok anymore:
> 
>  In particular look at the following classes:
> 
>  QGisInterface
>  http://svn.qgis.org/api_doc/html/classQgisInterface.htm
>  QgsMapCanvas
>  http://svn.qgis.org/api_doc/html/classQgsMapCanvas.html
>  QgsMapTool
>  http://svn.qgis.org/api_doc/html/classQgsMapTool.html
>  QgsPlugin
>  http://svn.qgis.org/api_doc/html/classQgisPlugin.html
> 
>  instead of
>  http://svn.qgis.org/api_doc/html
>  use
>  http://qgis.org/api/2.0/
> 
>  Good luck and have fun (again... why not python?)
> 
>  Where did you feel ignored anyway?
> 
>  Regards,
> 
>  Richard Duivenvoorde
> 
> 
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