[Qgis-developer] I am trying to add a class to core

[Nathan Woodrow]

Hey Benedict,

The core library is not meant to just be non-gui bits, hence why we have
core and gui.  As QgsMapCanvas is a class in gui you can't use it in core.

What did you have in mind we might be able to work out a way to fit it in.

Regards,
Nathan


On Mon, May 20, 2013 at 1:32 PM, Benedict Holland <
benedict.m.holland at gmail.com> wrote:

> Hi All,
>
> I am trying to create a brand new class for the core section of the code
> but I am getting linker errors. I am trying to include gui/qgsmapcanvas.h
> and then create a QgsMapCanvas object but I am getting an error which says
> that:
>
> undefined reference to `QgsMapCanvas::QgsMapCanvas(QWidget*, char const*)'
>
>
> I am guessing this is because I am trying to use an object found in the
> gui library but somehow isn't getting linked correctly to the core library.
> I added the core class I created to the CMakeList.txt and it seems to build
> so I assume I did that correctly. Adding ../gui in the INCLUDE_DIRECTORIES
> section didn't seem to help but at least I can now refer to the header as
> just "qgsmapcanvas.h" instead of "../gui/qgsmapcanvas.h"
>
>
> Basically, I can't figure out the magic that is required to link a class
> from the gui library to the core library. What do I do?
>
>
> Thanks,
>
> ~Ben
>
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