QObjectCleanupHandler

NAME

SYNOPSIS

Inherits QObject.

Public Members

DESCRIPTION

A QObjectCleanupHandler is useful whenever you need to know when a number of QObjects that are owned by someone else have been deleted. This is important, for example, when referencing memory in an application that has been allocated in a shared library.

Example:

    class FactoryComponent : public FactoryInterface, public QLibraryInterface


    {


    public:


        ...




        QObject *createObject();




        bool init();


        void cleanup();


        bool canUnload() const;




    private:


        QObjectCleanupHandler objects;


    };




    // allocate a new object, and add it to the cleanup handler


    QObject *FactoryComponent::createObject()


    {


        return objects.add( new QObject() );


    }




    // QLibraryInterface implementation


    bool FactoryComponent::init()


    {


        return TRUE;


    }




    void FactoryComponent::cleanup()


    {


    }




    // it is only safe to unload the library when all QObject's have been destroyed


    bool FactoryComponent::canUnload() const


    {


        return objects.isEmpty();


    }

See also Object Model.  

MEMBER FUNCTION DOCUMENTATION

QObjectCleanupHandler::QObjectCleanupHandler ()

QObjectCleanupHandler::~QObjectCleanupHandler ()

QObject * QObjectCleanupHandler::add ( QObject * object )

void QObjectCleanupHandler::clear ()

bool QObjectCleanupHandler::isEmpty () const

void QObjectCleanupHandler::remove ( QObject * object )

SEE ALSO

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