// Push event into active queue
bool EventManager::VQueueEvent( const IEventPtr& pEvent )
{
ENG_ASSERT( m_ActiveQueue >= 0 );
ENG_ASSERT( m_ActiveQueue < EVENTMANAGER_NUM_QUEUES );
auto mapIt = m_EventListeners.find( pEvent->VGetEventType() );
// If no one is listening, abort
if( mapIt == m_EventListeners.end() || !mapIt->second.size() )
{
return false;
}
m_EventQueues[m_ActiveQueue].push_back( pEvent );
return true;
}
// Make all listeners process the event right now instead of add the event into queue
bool EventManager::VTriggerEvent( IEventPtr pEvent ) const
{
auto mapIt = m_EventListeners.find( pEvent->VGetEventType() );
// corresponding listing list is not exist
if( mapIt == m_EventListeners.end() )
{
return false;
}
auto eventListenerList = mapIt->second;
bool processed = false;
for( auto listIt = eventListenerList.begin(); listIt != eventListenerList.end(); ++listIt )
{
EventListenerDelegate listener = (*listIt);
// trigger event
listener( pEvent );
processed = true;
}
return processed;
}
bool EventManager::VUpdate( unsigned long maxMs )
{
unsigned long currMs = (unsigned long) ( GetGlobalTimer()->GetTime() * 1000.0 );
unsigned long targetMs = ( maxMs == kINFINITE )? kINFINITE: currMs + maxMs;
// swap active queues and clear the new queue after the swap
int queueToProcess = m_ActiveQueue;
m_ActiveQueue = (m_ActiveQueue + 1) % EVENTMANAGER_NUM_QUEUES;
m_EventQueues[m_ActiveQueue].clear();
std::string s( ( "EventLoop", "Processing Event Queue " +
ToStr( queueToProcess ) + "; " +
ToStr( ( unsigned long ) m_EventQueues[ queueToProcess ].size() )
+ " events to process" ) ); \
Logger::Log( "EventLoop", s, NULL, NULL, 0 ); \
/*ENG_LOG("EventLoop", "Processing Event Queue " +
ToStr(queueToProcess) + "; " +
ToStr((unsigned long)m_EventQueues[queueToProcess].size())
+ " events to process");*/
// Process the queue
while ( !m_EventQueues[queueToProcess].empty() )
{
// pop the front of the queue
IEventPtr pEvent = m_EventQueues[queueToProcess].front();
m_EventQueues[queueToProcess].pop_front();
ENG_LOG( "EventLoop", "\t\tProcessing Event " + std::string( pEvent->GetName() ) );
const EventType& eventType = pEvent->VGetEventType();
// find all the delegate functions registered for this event
auto findIt = m_EventListeners.find(eventType);
if (findIt != m_EventListeners.end())
{
const EventListenerList& eventListeners = findIt->second;
ENG_LOG("EventLoop", "\t\tFound " + ToStr((unsigned long)eventListeners.size()) + " delegates");
// call each listener
for (auto it = eventListeners.begin(); it != eventListeners.end(); ++it)
{
EventListenerDelegate listener = (*it);
ENG_LOG("EventLoop", "\t\tSending event " + std::string(pEvent->GetName()) + " to delegate");
listener(pEvent);
}
}
// check to see if time ran out
currMs = (unsigned long) ( GetGlobalTimer()->GetTime() * 1000.0 );
if ( targetMs != IEventManager::kINFINITE && currMs >= targetMs )
{
ENG_LOG("EventLoop", "Aborting event processing; time ran out");
break;
}
}
// If we couldn't process all of the events, push the remaining events to the new active queue.
// Note: To preserve sequencing, go back-to-front, inserting them at the head of the active queue
bool queueFlushed = ( m_EventQueues[queueToProcess].empty() );
if ( !queueFlushed )
{
while (!m_EventQueues[queueToProcess].empty())
{
IEventPtr pEvent = m_EventQueues[queueToProcess].back();
m_EventQueues[queueToProcess].pop_back();
m_EventQueues[m_ActiveQueue].push_front(pEvent);
}
}
return queueFlushed;
}
