1 /***************************************************************************
2 * Copyright (C) 2005-2010 by the Quassel Project *
3 * devel@quassel-irc.org *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) version 3. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
21 #include "eventmanager.h"
28 EventManager::EventManager(QObject *parent) : QObject(parent) {
32 void EventManager::registerObject(QObject *object, Priority priority, const QString &methodPrefix) {
33 int eventEnumIndex = metaObject()->indexOfEnumerator("EventType");
34 Q_ASSERT(eventEnumIndex >= 0);
35 QMetaEnum eventEnum = metaObject()->enumerator(eventEnumIndex);
37 for(int i = object->metaObject()->methodOffset(); i < object->metaObject()->methodCount(); i++) {
38 QString methodSignature(object->metaObject()->method(i).signature());
40 if(!methodSignature.startsWith(methodPrefix))
43 methodSignature = methodSignature.section('(',0,0); // chop the attribute list
44 methodSignature = methodSignature.mid(methodPrefix.length()); // strip prefix
46 int eventType = eventEnum.keyToValue(methodSignature.toAscii());
48 qWarning() << Q_FUNC_INFO << QString("Could not find EventType %1").arg(methodSignature);
51 Handler handler(object, i, priority);
52 registeredHandlers()[static_cast<EventType>(eventType)].append(handler);
53 qDebug() << "Registered event handler for" << methodSignature << "in" << object;
57 void EventManager::registerEventHandler(EventType event, QObject *object, const char *slot, Priority priority) {
58 registerEventHandler(QList<EventType>() << event, object, slot, priority);
61 void EventManager::registerEventHandler(QList<EventType> events, QObject *object, const char *slot, Priority priority) {
62 int methodIndex = object->metaObject()->indexOfMethod(slot);
64 qWarning() << Q_FUNC_INFO << QString("Slot %1 not found in object %2").arg(slot).arg(object->objectName());
67 Handler handler(object, methodIndex, priority);
68 foreach(EventType event, events) {
69 registeredHandlers()[event].append(handler);
70 qDebug() << "Registered event handler for" << event << "in" << object;
74 // not threadsafe! if we should want that, we need to add a mutexed queue somewhere in this general area.
75 void EventManager::sendEvent(Event *event) {
79 void EventManager::dispatchEvent(Event *event) {
80 // we try handlers from specialized to generic by masking the enum
82 // build a list sorted by priorities that contains all eligible handlers
83 QList<Handler> handlers;
84 EventType type = event->type();
85 insertHandlers(registeredHandlers().value(type), handlers);
87 // check if we have a generic handler for the event group
88 if((type & EventGroupMask) != type)
89 insertHandlers(registeredHandlers().value(type & EventGroupMask), handlers);
91 // now dispatch the event
92 QList<Handler>::const_iterator it = handlers.begin();
93 while(it != handlers.end()) {
95 // TODO: check event flags here!
97 void *param[] = {0, Q_ARG(Event *, event).data() };
98 it->object->qt_metacall(QMetaObject::InvokeMetaMethod, it->methodIndex, param);
103 // finally, delete it
107 void EventManager::insertHandlers(const QList<Handler> &newHandlers, QList<Handler> &existing) {
108 foreach(Handler handler, newHandlers) {
109 if(existing.isEmpty())
110 existing.append(handler);
112 // need to insert it at the proper position
113 QList<Handler>::iterator it = existing.begin();
114 while(it != existing.end()) {
115 if(handler.priority > it->priority)
119 existing.insert(it, handler);