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# main.cpp Example File
activeqt/comapp/main.cpp

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     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
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     ** License version 2.0 as published by the Free Software Foundation
     ** and appearing in the file LICENSE.GPL included in the packaging of
     ** this file.  Please review the following information to ensure GNU
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     #include <QApplication>
     #include <QAxFactory>
     #include <QTabWidget>
     #include <QTimer>

     class Application;
     class DocumentList;

     class Document : public QObject
     {
         Q_OBJECT

         Q_CLASSINFO("ClassID", "{2b5775cd-72c2-43da-bc3b-b0e8d1e1c4f7}")
         Q_CLASSINFO("InterfaceID", "{2ce1761e-07a3-415c-bd11-0eab2c7283de}")

         Q_PROPERTY(Application *application READ application)
         Q_PROPERTY(QString title READ title WRITE setTitle)

     public:
         Document(DocumentList *list);
         ~Document();

         Application *application() const;

         QString title() const;
         void setTitle(const QString &title);

     private:
         QWidget *page;
     };

     class DocumentList : public QObject
     {
         Q_OBJECT

         Q_CLASSINFO("ClassID", "{496b761d-924b-4554-a18a-8f3704d2a9a6}")
         Q_CLASSINFO("InterfaceID", "{6c9e30e8-3ff6-4e6a-9edc-d219d074a148}")

         Q_PROPERTY(Application* application READ application)
         Q_PROPERTY(int count READ count)

     public:
         DocumentList(Application *application);

         int count() const;
         Application *application() const;

     public slots:
         Document *addDocument();
         Document *item(int index) const;

     private:
         QList<Document*> list;
     };

     class Application : public QObject
     {
         Q_OBJECT

         Q_CLASSINFO("ClassID", "{b50a71db-c4a7-4551-8d14-49983566afee}")
         Q_CLASSINFO("InterfaceID", "{4a427759-16ef-4ed8-be79-59ffe5789042}")
         Q_CLASSINFO("RegisterObject", "yes")

         Q_PROPERTY(DocumentList* documents READ documents)
         Q_PROPERTY(QString id READ id)
         Q_PROPERTY(bool visible READ isVisible WRITE setVisible)

     public:
         Application(QObject *parent = 0);
         DocumentList *documents() const;

         QString id() const { return objectName(); }

         void setVisible(bool on);
         bool isVisible() const;

         QTabWidget *window() const { return ui; }

     public slots:
         void quit();

     private:
         DocumentList *docs;

         QTabWidget *ui;
     };

     Document::Document(DocumentList *list)
     : QObject(list)
     {
         QTabWidget *tabs = list->application()->window();
         page = new QWidget(tabs);
         page->setWindowTitle("Unnamed");
         tabs->addTab(page, page->windowTitle());

         page->show();
     }

     Document::~Document()
     {
         delete page;
     }

     Application *Document::application() const
     {
         return qobject_cast<DocumentList*>(parent())->application();
     }

     QString Document::title() const
     {
         return page->windowTitle();
     }

     void Document::setTitle(const QString &t)
     {
         page->setWindowTitle(t);

         QTabWidget *tabs = application()->window();
         int index = tabs->indexOf(page);
         tabs->setTabText(index, page->windowTitle());
     }

     DocumentList::DocumentList(Application *application)
     : QObject(application)
     {
     }

     Application *DocumentList::application() const
     {
         return qobject_cast<Application*>(parent());
     }

     int DocumentList::count() const
     {
         return list.count();
     }

     Document *DocumentList::item(int index) const
     {
         if (index >= list.count())
             return 0;

         return list.at(index);
     }

     Document *DocumentList::addDocument()
     {
         Document *document = new Document(this);
         list.append(document);

         return document;
     }

     Application::Application(QObject *parent)
     : QObject(parent), ui(0)
     {
         ui = new QTabWidget;

         setObjectName("From QAxFactory");
         docs = new DocumentList(this);
     }

     DocumentList *Application::documents() const
     {
         return docs;
     }

     void Application::setVisible(bool on)
     {
         ui->setShown(on);
     }

     bool Application::isVisible() const
     {
         return ui->isVisible();
     }

     void Application::quit()
     {
         delete docs;
         docs = 0;

         delete ui;
         ui = 0;
         QTimer::singleShot(0, qApp, SLOT(quit()));
     }

     #include "main.moc"

     QAXFACTORY_BEGIN("{edd3e836-f537-4c6f-be7d-6014c155cc7a}", "{b7da3de8-83bb-4bbe-9ab7-99a05819e201}")
        QAXCLASS(Application)
        QAXTYPE(Document)
        QAXTYPE(DocumentList)
     QAXFACTORY_END()

     int main(int argc, char **argv)
     {
         QApplication app(argc, argv);
         app.setQuitOnLastWindowClosed(false);

         // started by COM - don't do anything
         if (QAxFactory::isServer())
             return app.exec();

         // started by user
         Application appobject(0);
         appobject.setObjectName("From Application");

         QAxFactory::startServer();
         QAxFactory::registerActiveObject(&appobject);

         appobject.setVisible(true);

         QObject::connect(qApp, SIGNAL(lastWindowClosed()), &appobject, SLOT(quit()));

         return app.exec();
     }