qcoreevent.cpp

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#include "qcoreevent.h"
#include "qcoreapplication.h"
#include "qcoreapplication_p.h"

#include "qmutex.h"
#include "qset.h"

QT_BEGIN_NAMESPACE

QEvent::QEvent(Type type)
    : d(0), t(type), posted(false), spont(false), m_accept(true)
{}

QEvent::~QEvent()
{
    if (posted && QCoreApplication::instance())
        QCoreApplicationPrivate::removePostedEvent(this);
}


class QEventUserEventRegistration
{
public:
    QMutex mutex;
    QSet<int> set;
};
Q_GLOBAL_STATIC(QEventUserEventRegistration, userEventRegistrationHelper)


int QEvent::registerEventType(int hint)
{
    QEventUserEventRegistration *userEventRegistration
        = userEventRegistrationHelper();
    if (!userEventRegistration)
        return -1;

    QMutexLocker locker(&userEventRegistration->mutex);

    // if the type hint hasn't been registered yet, take it
    if (hint >= QEvent::User && hint <= QEvent::MaxUser && !userEventRegistration->set.contains(hint)) {
        userEventRegistration->set.insert(hint);
        return hint;
    }

    // find a free event type, starting at MaxUser and decreasing
    int id = QEvent::MaxUser;
    while (userEventRegistration->set.contains(id) && id >= QEvent::User)
        --id;
    if (id >= QEvent::User) {
        userEventRegistration->set.insert(id);
        return id;
    }
    return -1;
}

QTimerEvent::QTimerEvent(int timerId)
    : QEvent(Timer), id(timerId)
{}

QTimerEvent::~QTimerEvent()
{
}

QChildEvent::QChildEvent(Type type, QObject *child)
    : QEvent(type), c(child)
{}

QChildEvent::~QChildEvent()
{
}

#ifdef QT3_SUPPORT
QCustomEvent::QCustomEvent(int type, void *data)
    : QEvent(static_cast<Type>(type))
{
    d = reinterpret_cast<QEventPrivate *>(data);
}

QCustomEvent::~QCustomEvent()
{
}
#endif

QDynamicPropertyChangeEvent::QDynamicPropertyChangeEvent(const QByteArray &name)
    : QEvent(QEvent::DynamicPropertyChange), n(name)
{
}

QDynamicPropertyChangeEvent::~QDynamicPropertyChangeEvent()
{
}

QT_END_NAMESPACE