Thx for reading and possibly answering this post

I'm striving to open a dbus adaptor with qt5. I provide you with a working example. See below.
The example program works, but I don't see any available adaptor with qdbusviewver. It should be 'org.kde.main'

What's wrong ?

### CMakeLists.txt ###

cmake_minimum_required(VERSION 2.
project(dbus)

find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED Core DBus)

# change path here !
set(Q "/opt/Qt5.3.1/5.3/gcc_64/include/")
include_directories(${Q}QtCore ${Q}DBus)

set(SRC main.cpp)

qt5_wrap_cpp(MOC main.h)

qt5_generate_dbus_interface(main.h main.xml)

qt5_add_dbus_adaptor(SRC1 main.xml main.h Main)

add_executable(main ${SRC} ${SRC1} ${MOC})

target_link_libraries(main Qt5::Core Qt5::DBus)


### main.h ###

#ifndef MAIN
#define MAIN
#include <QtDBus/QtDBus>

class Main: public QObject
{
Q_OBJECT
Q_CLASSINFO("D-Bus Interface", "org.kde.main")

public:

Main(QObject *parent);

public slots:

QString Test();
};
#endif

### main.cpp ###

#include "main.h"
#include <QCoreApplication>
#include "mainadaptor.h"

Main::Main(QObject *parent) : QObject(parent)
{
new MainAdaptor(this);
QDBusConnection::sessionBus().registerObject("/Main", this);
}

QString Main::Test() { return "Ok"; }

int main(int argc, char *argv[])
{
QCoreApplication qapp(argc, argv);
Main Main(&qapp);
qapp.exec();

}

### thx again for your help

If you don't get a response here, you may wish to try asking on the KDE Devel mailing list, where someone might be able to answer your question. It can be emailed at kde-devel@kde.org. You could also try using the KDBusAddons framework.

I did as you suggested and also subscribed to the relevant forum at qt-project.org, but I got nothing, not even a acknowledgement of the issue.

Thank you for your help

Could you please upload a tarball of your source code somewhere, and explain what exactly is failing?

Sure, you can get it from http://skylendar.kde.org/dbus.tar.bz2, then run cmake and make as usual. You should get an executable named main.

Run main. It doesn't display anything, but if you launch qdbusviewer, a dbus bus named org.kde.main, should be displayed. It is not the case. It works with kde4 but not with qt5/kf5.

Is it a QDBusAdaptor bug somewhere, or a bug in my small program ?

So it compiles, but does not list on D-Bus? Have you tried looking into KDBus, which is provided by one of the Frameworks?

will try, but all the involved resources of my program use qt5, so it seems to be a qt5 problem. In addition, kf5 crashes on my opensuse box.

Why a dbus bus can only be seen by a kf5 app and not by the native and relevant tool designed for that, qdbusviewer ?

thx anyway for the tip.

Also tried the standard dbus-send command, but I got the same thing. Something seems wrong with QDBusAdaptor, which is a key class of the qt dbus stack. Weird weird

Does it exist a working example of QDBusAdaptor for qt5 ? The one provided with the qt5 doc doesn't work as swell.

That is extremely unusual - if the included Qt examples don't work then something is very wrong. Is qdbus (as provided with Qt 5) able to work as a client?

A year late -- but the reason this is not working is not a build issue. Need to also register the serviceName. New main with fixes follows.

Code: Select all

#include "main.h"
#include <QCoreApplication>
#include "mainadaptor.h"

Main::Main(QObject *parent) : QObject(parent)
{
  new MainAdaptor(this);
  QDBusConnection connection = QDBusConnection::sessionBus();
   
  connection.registerObject("/", this);
  int dbusClassInfoIndex = this->metaObject()->indexOfClassInfo("D-Bus Interface
");
   
  QString dbusServiceName = this->metaObject()->classInfo(dbusClassInfoIndex).va
lue();
  connection.registerService(dbusServiceName);

}

QString Main::Test() { return "Ok"; }

int main(int argc, char *argv[])
{
   QCoreApplication qapp(argc, argv);
   Main Main(&qapp);
   qapp.exec();
   
}