void EventManager::dispatchEvent(Event *event)
{
//qDebug() << "Dispatching" << event;
// we try handlers from specialized to generic by masking the enum
// build a list sorted by priorities that contains all eligible handlers
QList<Handler> handlers;
QHash<QObject *, Handler> filters;
QSet<QObject *> ignored;
uint type = event->type();
bool checkDupes = false;
// special handling for numeric IrcEvents
if ((type & ~IrcEventNumericMask) == IrcEventNumeric) {
::IrcEventNumeric *numEvent = static_cast< ::IrcEventNumeric *>(event);
if (!numEvent)
qWarning() << "Invalid event type for IrcEventNumeric!";
else {
int num = numEvent->number();
if (num > 0) {
insertHandlers(registeredHandlers().value(type + num), handlers, false);
insertFilters(registeredFilters().value(type + num), filters);
checkDupes = true;
}
}
}
// exact type
insertHandlers(registeredHandlers().value(type), handlers, checkDupes);
insertFilters(registeredFilters().value(type), filters);
// check if we have a generic handler for the event group
if ((type & EventGroupMask) != type) {
insertHandlers(registeredHandlers().value(type & EventGroupMask), handlers, true);
insertFilters(registeredFilters().value(type & EventGroupMask), filters);
}
// now dispatch the event
QList<Handler>::const_iterator it;
for (it = handlers.begin(); it != handlers.end() && !event->isStopped(); ++it) {
QObject *obj = it->object;
if (ignored.contains(obj)) // object has filtered the event
continue;
if (filters.contains(obj)) { // we have a filter, so let's check if we want to deliver the event
Handler filter = filters.value(obj);
bool result = false;
void *param[] = { Q_RETURN_ARG(bool, result).data(), Q_ARG(Event *, event).data() };
obj->qt_metacall(QMetaObject::InvokeMetaMethod, filter.methodIndex, param);
if (!result) {
ignored.insert(obj);
continue; // mmmh, event filter told us to not accept
}
}
void EventManager::registerEventHandler(QList<EventType> events, QObject *object, const char *slot, Priority priority, bool isFilter) {
int methodIndex = object->metaObject()->indexOfMethod(slot);
if(methodIndex < 0) {
qWarning() << Q_FUNC_INFO << QString("Slot %1 not found in object %2").arg(slot).arg(object->objectName());
return;
}
Handler handler(object, methodIndex, priority);
foreach(EventType event, events) {
if(isFilter) {
registeredFilters()[event].append(handler);
qDebug() << "Registered event filter for" << event << "in" << object;
} else {
registeredHandlers()[event].append(handler);
qDebug() << "Registered event handler for" << event << "in" << object;
}
}
}
void EventManager::registerObject(QObject *object, Priority priority, const QString &methodPrefix, const QString &filterPrefix) {
for(int i = object->metaObject()->methodOffset(); i < object->metaObject()->methodCount(); i++) {
QString methodSignature(object->metaObject()->method(i).signature());
int eventType = findEventType(methodSignature, methodPrefix);
if(eventType > 0) {
Handler handler(object, i, priority);
registeredHandlers()[eventType].append(handler);
//qDebug() << "Registered event handler for" << methodSignature << "in" << object;
}
eventType = findEventType(methodSignature, filterPrefix);
if(eventType > 0) {
Handler handler(object, i, priority);
registeredFilters()[eventType].append(handler);
//qDebug() << "Registered event filterer for" << methodSignature << "in" << object;
}
}
}
