[C++-sig] Boost and wxWidgets

[Joan Carles Jimenez]

Hi.

  I am testing the following source code:



--------
Canvas.h
--------

#ifndef _CANVAS_H_
#define _CANVAS_H_

#include <string>
#include "wx/wx.h"

class CanvasFrame
{
    protected:
        wxFrame* _frame;
        
    public:
        CanvasFrame(const std::string& pTitle);  
        ~CanvasFrame(void);  
        
        void Plot(void);
};

#endif /* _CANVAS_H_ */

----------
Canvas.cpp
----------

#include <Python.h>
#include "canvas.h"

CanvasFrame::CanvasFrame(const std::string& pTitle)
{
    _frame = new wxFrame(NULL, wxID_ANY,
wxString::FromAscii(pTitle.c_str()));
}

CanvasFrame::~CanvasFrame(void)
{
    if(_frame) {
        delete _frame;
    }
}

void CanvasFrame::Plot(void)
{
}

-----------
wrapper.cpp
-----------

#include <boost/python.hpp>
#include "canvas.h"

using namespace boost::python;

BOOST_PYTHON_MODULE(canvas)
{
    class_<CanvasFrame>("CanvasFrame", init<const std::string&>())
        .def("Plot", &CanvasFrame::Plot)
    ;
}



And to generate the module "canvas.so" I execute:



g++ -shared -g -I. -I/usr/include/python2.6 -lpython2.6 canvas.cpp
wrapper.cpp /usr/lib64/libboost_python.so -fPIC `wx-config --cxxflags`
`wx-config --libs` -o canvas.so

"canvas.so" is generated without any problems but when I execute in the
python console the next code:



>>> import canvas
>>> a = canvas.CanvasFrame('My Plot Window')



I have the next errors:



(process:3521): GLib-GObject-CRITICAL **: gtype.c:2458: initialization
assertion failed, use IA__g_type_init() prior to this function

(process:3521): GLib-CRITICAL **: g_once_init_leave: assertion
`initialization_value != 0' failed

(process:3521): Gdk-CRITICAL **: gdk_cursor_new_for_display: assertion
`GDK_IS_DISPLAY (display)' failed

(process:3521): GLib-GObject-CRITICAL **: gtype.c:2458: initialization
assertion failed, use IA__g_type_init() prior to this function



And more, and more, and more. I have watched the examples of 

http://wiki.python.org/moin/boost.python/ExportingClasses

but I have not seen any problem. They can help me? Thanks!


P.D. Sorry for my english!