void EventDispatcher::dispatchEvent(Event* event)
{
if (!_isEnabled)
return;
updateDirtyFlagForSceneGraph();
DispatchGuard guard(_inDispatch);
if (event->getType() == Event::Type::TOUCH)
{
dispatchTouchEvent(static_cast<EventTouch*>(event));
return;
}
auto listenerID = event->getTypeKey();
auto iter = _listenerMap.find(listenerID);
if (iter != _listenerMap.end())
{
sortEventListeners(listenerID);
auto listeners = iter->second;
auto onEvent = [&event](EventListener* listener) -> bool{
event->setCurrentTarget(listener->getAssociatedNode());
listener->_onEvent(event);
return event->isStopped();
};
dispatchEventToListeners(listeners, onEvent);
updateListeners(event);
}
}
void EventDispatcher::dispatchTouchEvent(EventTouch* event)
{
sortEventListeners(EventListenerTouchOneByOne::LISTENER_ID);
sortEventListeners(EventListenerTouchAllAtOnce::LISTENER_ID);
auto oneByOneListeners = getListeners(EventListenerTouchOneByOne::LISTENER_ID);
auto allAtOnceListeners = getListeners(EventListenerTouchAllAtOnce::LISTENER_ID);
// If there aren't any touch listeners, return directly.
if (nullptr == oneByOneListeners && nullptr == allAtOnceListeners)
return;
bool isNeedsMutableSet = (oneByOneListeners && allAtOnceListeners);
const std::vector<Touch*>& originalTouches = event->getTouches();
std::vector<Touch*> mutableTouches(originalTouches.size());
std::copy(originalTouches.begin(), originalTouches.end(), mutableTouches.begin());
//
// process the target handlers 1st
//
if (oneByOneListeners)
{
auto mutableTouchesIter = mutableTouches.begin();
auto touchesIter = originalTouches.begin();
for (; touchesIter != originalTouches.end(); ++touchesIter)
{
bool isSwallowed = false;
auto onTouchEvent = [&](EventListener* l) -> bool { // Return true to break
EventListenerTouchOneByOne* listener = static_cast<EventListenerTouchOneByOne*>(l);
// Skip if the listener was removed.
if (!listener->_isRegistered)
return false;
event->setCurrentTarget(listener->_node);
bool isClaimed = false;
std::vector<Touch*>::iterator removedIter;
EventTouch::EventCode eventCode = event->getEventCode();
if (eventCode == EventTouch::EventCode::BEGAN)
{
if (listener->onTouchBegan)
{
isClaimed = listener->onTouchBegan(*touchesIter, event);
if (isClaimed && listener->_isRegistered)
{
listener->_claimedTouches.push_back(*touchesIter);
}
}
}
else if (listener->_claimedTouches.size() > 0
&& ((removedIter = std::find(listener->_claimedTouches.begin(), listener->_claimedTouches.end(), *touchesIter)) != listener->_claimedTouches.end()))
{
isClaimed = true;
switch (eventCode)
{
case EventTouch::EventCode::MOVED:
if (listener->onTouchMoved)
{
listener->onTouchMoved(*touchesIter, event);
}
break;
case EventTouch::EventCode::ENDED:
if (listener->onTouchEnded)
{
listener->onTouchEnded(*touchesIter, event);
}
if (listener->_isRegistered)
{
listener->_claimedTouches.erase(removedIter);
}
break;
case EventTouch::EventCode::CANCELLED:
if (listener->onTouchCancelled)
{
listener->onTouchCancelled(*touchesIter, event);
}
if (listener->_isRegistered)
{
listener->_claimedTouches.erase(removedIter);
}
break;
default:
CCASSERT(false, "The eventcode is invalid.");
break;
}
}
// If the event was stopped, return directly.
if (event->isStopped())
{
updateListeners(event);
return true;
}
CCASSERT((*touchesIter)->getID() == (*mutableTouchesIter)->getID(), "");
if (isClaimed && listener->_isRegistered && listener->_needSwallow)
{
if (isNeedsMutableSet)
{
mutableTouchesIter = mutableTouches.erase(mutableTouchesIter);
isSwallowed = true;
}
return true;
}
return false;
};
//
dispatchEventToListeners(oneByOneListeners, onTouchEvent);
if (event->isStopped())
{
return;
}
if (!isSwallowed)
++mutableTouchesIter;
}
}
//
// process standard handlers 2nd
//
if (allAtOnceListeners && mutableTouches.size() > 0)
{
auto onTouchesEvent = [&](EventListener* l) -> bool{
EventListenerTouchAllAtOnce* listener = static_cast<EventListenerTouchAllAtOnce*>(l);
// Skip if the listener was removed.
if (!listener->_isRegistered)
return false;
event->setCurrentTarget(listener->_node);
switch (event->getEventCode())
{
case EventTouch::EventCode::BEGAN:
if (listener->onTouchesBegan)
{
listener->onTouchesBegan(mutableTouches, event);
}
break;
case EventTouch::EventCode::MOVED:
if (listener->onTouchesMoved)
{
listener->onTouchesMoved(mutableTouches, event);
}
break;
case EventTouch::EventCode::ENDED:
if (listener->onTouchesEnded)
{
listener->onTouchesEnded(mutableTouches, event);
}
break;
case EventTouch::EventCode::CANCELLED:
if (listener->onTouchesCancelled)
{
listener->onTouchesCancelled(mutableTouches, event);
}
break;
default:
CCASSERT(false, "The eventcode is invalid.");
break;
}
// If the event was stopped, return directly.
if (event->isStopped())
{
updateListeners(event);
return true;
}
return false;
};
dispatchEventToListeners(allAtOnceListeners, onTouchesEvent);
if (event->isStopped())
{
return;
}
}
updateListeners(event);
}