Thank you for your answer Hugo.
I have tried to make a simple test but I keep failing when linking the
program. I have extracted a minimal test case which will not run properly,
but it reproduces the linking error. (I am using Ubuntu 10.04 32-bit.)
The error message is shown below. SbkPySide_QtGuiTypes is defined in
pyside_qtgui_python.h as "extern". I have tried to grep which library it
resides in but I have so far been unsuccessful (only found in libraries in
python2.6/site-packages). I would appreciate if anyone could point me in the
correct direction.
[100%] Building CXX object CMakeFiles/integrationtest.dir/Test.cc.o
Linking CXX executable integrationtest
CMakeFiles/integrationtest.dir/Test.cc.o: In function `_typeobject*
Shiboken::SbkType<QWidget>()':
/home/stefan/opt/include/PySide/QtGui/pyside_qtgui_python.h:1402: undefined
reference to `SbkPySide_QtGuiTypes'
collect2: ld returned 1 exit status
make[2]: *** [integrationtest] Error 1
make[1]: *** [CMakeFiles/integrationtest.dir/all] Error 2
make: *** [all] Error 2
Test.cc:
#include "pyside_qtgui_python.h"
#include "Python.h"
#include <QtGui>
int main(int argc, char *argv[])
{
PyObject *o;
QWidget *widget =
Shiboken::Converter<QWidget*>::toCpp(o);
}
CMakeLists.txt:
cmake_minimum_required(VERSION 2.8)
project(Integration CXX C)
# *** CHANGE TO FIT YOUR ENVIRONMENT
set(MYPREFIX "/home/stefan/opt/lib/cmake")
LIST(APPEND CMAKE_MODULE_PATH
"${MYPREFIX}/PySide-0.4.1"
"${MYPREFIX}/Shiboken-0.5.0")
include(ShibokenConfig)
include(PySideConfig)
include_directories(${SHIBOKEN_INCLUDE_DIR})
include_directories(${PYSIDE_INCLUDE_DIR})
include_directories(${PYSIDE_INCLUDE_DIR}/QtGui)
include_directories(${PYSIDE_INCLUDE_DIR}/QtCore)
find_package(PythonLibs)
include_directories(${PYTHON_INCLUDE_PATH})
find_package(Qt4 COMPONENTS QtCore QtGui REQUIRED)
include(${QT_USE_FILE})
add_executable(integrationtest
Test.cc
)
target_link_libraries(integrationtest
${QT_LIBRARIES}
${PYTHON_LIBRARIES}
# ${SHIBOKEN_LIBRARY}
${PYSIDE_LIBRARY}
)
2010/10/1 Hugo Parente Lima <[email protected]>
> On Friday 01 October 2010 14:21:38 Stefan Larsson wrote:
> > Ah, that looks simple enough, thank you.
> >
> > This make me think about two new issues which I need to understand before
> > making a first experiment:
> >
> > 1. Can PySide use the QApplication object from the C++ application? I
> > assume that the object must be registered with PySide in some way such
> > that PySide understands that a QApplication object is available?
>
> Yes, it *will* use the current QApplication.
>
> > I assume that I should expect problems when using a QWidget from another
> > QApplication (with a different QPaintDevice) in different QApplication.
> > The reason I ask is that when creating a QWidget without a QApplication
> the
> > error message "QWidget: Must construct a QApplication before a
> > QPaintDevice" is obtained...
>
> Qt was designed to have just one QApplication instance per process, so the
> Python code will use your QApplication automatically without changes in
> your
> code, our cleanup code uses "QApplication::instance()" so there'll be no
> problems... only the qApp "macro" will not be available to your python
> code.
>
> > 2. Have you experienced any best practices when it comes to destroying
> > widgets which are embedded in this way? If a C++ parent widget with a
> > PySide child is destroyed in the C++ application, would the PySide widget
> > be destroyed in a proper way or should I pay special attention to such
> > embedded PySide widgets?
>
> Yes, it should be deleted automagically. We suffer from the same problem in
> pure python programs when Qt deletes some object. If the PySide widget was
> explicitly created in Python will be even better, because the underlying
> C++
> object will have a destructor to tell PySide that the C++ object was
> deleted.
>
> Regards
>
> > 2010/10/1 Renato Araujo Oliveira Filho <[email protected]>
> >
> > > Hi Stefan,
> > >
> > > you can use the header generated by pyside for QtGui module found in
> > > "$PREFIX/include/PySide/QtGui/pyside_qtgui_python.h", then use these
> > > functions:
> > >
> > > Retrieve the C++ pointer from a Python object:
> > > cppObj* = Shiboken::Converter< [c++ type] >::toCpp(PythonObject*)
> > >
> > > Retrieve the Python object from a c++ object:
> > > PyObject* = Shiboken::Converter< [c++ type] >::toPython(c++Obj*)
> > >
> > > BR
> > >
> > > On Fri, Oct 1, 2010 at 8:37 AM, Stefan Larsson <[email protected]>
> wrote:
> > > > Hello,
> > > > I am writing a C++ application using Qt4 and I am using Python
> embedded
> > >
> > > in
> > >
> > > > the application as a scripting backend for simple plugin development.
> > > > My question is if it is possible to acquire a QWidget* pointer from
> > >
> > > Pyside
> > >
> > > > such that custom widgets written using Pyside can be embedded
> directly
> > > > within the C++ application? If not, would it be difficult to
> implement
> > >
> > > such
> > >
> > > > a feature?
> > > > I have also looked at PythonQt, but it seems as if Pyside has better
> > > > potential.
> > > > Best Regards,
> > > > Stefan Larsson
> > > >
> > > > _______________________________________________
> > > > PySide mailing list
> > > > [email protected]
> > > > http://lists.openbossa.org/listinfo/pyside
> > >
> > > --
> > > Renato Araujo Oliveira Filho
> > > Instituto Nokia de Tecnologia - INdT
> > > Mobile: +55 (81) 8704-2144
>
> --
> Hugo Parente Lima
> INdT - Instituto Nokia de Tecnologia
>
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