qsocketnotifier.cpp

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#include "qsocketnotifier.h"

#include "qplatformdefs.h"

#include "qabstracteventdispatcher.h"
#include "qcoreapplication.h"

#include "qobject_p.h"
#include <private/qthread_p.h>

QT_BEGIN_NAMESPACE

QSocketNotifier::QSocketNotifier(int socket, Type type, QObject *parent)
    : QObject(parent)
{
    sockfd = socket;
    sntype = type;
    snenabled = true;

    Q_D(QObject);
    if (socket < 0)
        qWarning("QSocketNotifier: Invalid socket specified");
    else if (!d->threadData->eventDispatcher)
        qWarning("QSocketNotifier: Can only be used with threads started with QThread");
    else
        d->threadData->eventDispatcher->registerSocketNotifier(this);
}

#ifdef QT3_SUPPORT

QSocketNotifier::QSocketNotifier(int socket, Type type, QObject *parent,
                                  const char *name)
    : QObject(parent)
{
    setObjectName(QString::fromAscii(name));
    if (socket < 0)
        qWarning("QSocketNotifier: Invalid socket specified");
    sockfd = socket;
    sntype = type;
    snenabled = true;

    Q_D(QObject);
    if (!d->threadData->eventDispatcher) {
        qWarning("QSocketNotifier: Can only be used with threads started with QThread");
    } else {
        d->threadData->eventDispatcher->registerSocketNotifier(this);
    }
}
#endif

QSocketNotifier::~QSocketNotifier()
{
    setEnabled(false);
}


void QSocketNotifier::setEnabled(bool enable)
{
    if (sockfd < 0)
        return;
    if (snenabled == enable)                        // no change
        return;
    snenabled = enable;

    Q_D(QObject);
    if (!d->threadData->eventDispatcher) // perhaps application/thread is shutting down
        return;
    if (snenabled)
        d->threadData->eventDispatcher->registerSocketNotifier(this);
    else
        d->threadData->eventDispatcher->unregisterSocketNotifier(this);
}


bool QSocketNotifier::event(QEvent *e)
{
    // Emits the activated() signal when a QEvent::SockAct is
    // received.
    if (e->type() == QEvent::ThreadChange) {
        if (snenabled) {
            QMetaObject::invokeMethod(this, "setEnabled", Qt::QueuedConnection,
                                      Q_ARG(bool, snenabled));
            setEnabled(false);
        }
    }
    QObject::event(e);                        // will activate filters
    if (e->type() == QEvent::SockAct) {
        emit activated(sockfd);
        return true;
    }
    return false;
}

QT_END_NAMESPACE