bcooksley,

not sure how to do this. I wanted to try this:

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QCoreApplication* qcapp = QApplication::instance();
QApplication* qapp = dynamic_cast<QApplication*>(qcapp);
MyApp::m_app* app = qobject_cast<MyApp::m_app*>(qapp);
app->m_mainWindow->createGUI(m_part);



But my application has a MyApp class with a protected QApplication member m_app. How will I be able to do the last cast?
Currently I get a:

error: object missing in reference to 'MyApp::m_app'

Anyone got an idea on my "could not find plugin" issue? I'm really stuck on that I would guess it's a simple problem

Try this:

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MyApp * app = qobject_cast<MyApp*>( QApplication::instance() );
app->m_mainWindow->createGUI(m_part);

You can do casts from a QCoreApplication object all the way up to your K(Unique)Application subclass without any issues, or interleaving steps

bcooksley,

I've tried this but then an error occured:

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source/Report/preporteditor.cpp: In member function 'void ReportEditor::initialiseReportArea(QWidget*)':
/usr/include/QtCore/qobject.h: In function 'T qobject_cast(QObject*) [with T = MyApp*]':
source/Report/reporteditor.cpp:140:   instantiated from here
/usr/include/QtCore/qobject.h:441: error: 'class MyApp' has no member named 'qt_check_for_QOBJECT_macro'
/usr/include/QtCore/qobject.h:443: error: 'class MyApp' has no member named 'staticMetaObject'


I think that's because MyApp::m_app is a QApplication...
My MyApp class .h:

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class MyApp
{
public:
  MyApp( int argc, char* argv[]);
  friend class ReportEditor;
  virtual int run();
 
protected:
  QApplication m_app;
}


and .cpp

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MyApp::MyApp(int argc, char* argv[])
{.....}

MyApp::run()
{
  MainWindow* myMainWindow = new MainWindow();
  m_app.exec();
}


OK,

I've created a solution ( perhaps won't win the beauty contest price but it works). I just put my mainwindow in a namespace and created a get function which returns the mainwindow and then ran createGUI()... and it works.
Special thanks to bcooksley, zander,cyrille and the rest of the guys.

About the code sample in the initial post: it failed because the plugin is called libkwordpart.so but is located in "modules", which is not what KPluginLoader expects (the compat code for "libfoo in modules" is above KPluginLoader).
=> the solution is KPluginLoader("libkwordpart").

But of course this puts an implementation detail (the name of the module on disk, which should one day be fixed to remove the 'lib' prefix, as one can see in the warnings), so it would be better to start from the desktop file instead, which is less likely to change names. This gives:

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    KService::Ptr service = KService::serviceByDesktopPath("kwordpart.desktop");
    KParts::ReadWritePart *m_part = 0;

    if (service) {
        m_part = service->createInstance<KParts::ReadWritePart>(parent);
        if (m_part) {
            // use m_part->wiget()
            // call m_part->openUrl() so that something is shown.
        } else {
            return 1;
        }
    } else {
        qDebug("service kwordpart.desktop not found");
    }


GREAT!!!! it works perfectly. A HUGE Thanks for dfaure of the kde development team and co-designer of the KParts-technology.

I got this working with the KPluginLoader

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KLibFactory *partFactory = KLibLoader::self()->factory("kwordpart");


thank you, xyfix for your help.

tmoti,

the libloader method is depricated. I had a talk with david faure about it and I changed the kde manual so that it now states that people should use the kservice desktop file instead.