[Qgis-developer] Plugin Development C++ Windows - Any response?

[Julien Malik]

Hello,

Having written some C++ plugins (for Orfeo Toolbox), I have some 
feedback to give.

The current recommended procedure is to have a source build of qgis, add 
your plugin inside qgis source tree, hack a QGis CMakeLists to add the 
new plugin dir, and recompile Qgis.

In my opinion, a better approach is to build them as external project.
The idea is to be able to build a plugin on top of a prebuilt Qgis 
(libqgis-dev on ubuntu/debian, and the OSGeo4W build on windows)

That's what I have set up for the plugins I wrote, but ran into the 
following problem :
- There is no FindQgis.cmake or QGisConfig.cmake exported in the qgis 
development package (either OSGeo4W or ubuntu/debian), so importing QGis 
inside a CMake project must be done "by hand". It's ok with the QGis 
include path and the path to libqgis_core. But you have to take care of 
importing Qt also, which should be done by a FindQgis.cmake
- I had to hack some QGis #define to make it build on windows 
(GUI_EXPORT and CORE_EXPORT). Again, this should be handled by a 
ADD_DEFINITION inside a FindQgis.cmake

One other thing : it would be nice if the C++ plugins could be loaded 
from another directory than the official one.
Let's say I wrote a bunch of plugins for a specific software, I would 
like to store them in their own directory instead of messing up with the 
official plugins. Maybe it's already supported but I don't know how to 
do it...

Regards,
Julien


Le 23/02/2011 14:12, Barend Gehrels a écrit :
> Hi,
>
>
>> Yes as Martin notes, and as I mentioned in my last email in this
>> thread "If you are able to use linux, you can even more easily just
>> use the plugin_builder.py script in that src/plugins directory and it
>> will generate for you a 'hello world' C++ plugin."
>>
>> Perhaps the linux part is not relevant though as you should be able to
>> use it on widows with python, but I've never tried. As an interesting
>> history note, we have had a plugin builder script (in one form or
>> another) in QGIS for c++ plugins from very early on in the life of
>> QGIS's plugin support.
>>
>
> On Windows the plugin_builder.py works also perfectly.
>
> Regards, Barend
>
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