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stAcKbASed EvENtS

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This commit is contained in:
Ben
2021-09-27 16:08:48 +01:00
parent 1b494f45e0
commit d69b6af375
2 changed files with 117 additions and 13 deletions
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95
Aeon/Core/Events.cpp
View File

@@ -17,12 +17,34 @@ EventListener::~EventListener()
}
void EventListener::RegisterAsSink( std::string system, int layer )
void EventListener::PushThisAsSink( std::string system )
{
mListenerID = EventManager::GetInstance().RegisterSink( this, system );
mListenerID = EventManager::GetInstance().RegisterSinkPush( this, system );
AEON_ASSERT( mListenerID != -1, "Cannot register event sink" );
}
void EventListener::PushAndStickThisAsSink( std::string system )
{
mListenerID = EventManager::GetInstance().RegisterSinkPushStick( this, system );
AEON_ASSERT( mListenerID != -1, "Cannot register event sink" );
}
void EventListener::UnshiftThisAsSink( std::string system )
{
mListenerID = EventManager::GetInstance().RegisterSinkUnshift( this, system );
AEON_ASSERT( mListenerID != -1, "Cannot register event sink" );
}
void EventListener::ShiftSinkLeft( std::string forSystem )
{
EventManager::GetInstance().MoveSinkLeft( this, forSystem );
}
void EventListener::ShiftSinkRight( std::string forSystem )
{
EventManager::GetInstance().MoveSinkRight( this, forSystem );
}
void EventListener::DeRegisterAsSink( std::string system )
{
@@ -90,7 +112,7 @@ int EventManager::RegisterSource( EventDispatcher* source, std::string system )
return id;
}
int EventManager::RegisterSink( EventListener* sink, std::string system )
int EventManager::RegisterSinkPush( EventListener* sink, std::string system )
{
int id = mNextHeighest;
mListeners[id] = sink;
@@ -100,6 +122,7 @@ int EventManager::RegisterSink( EventListener* sink, std::string system )
{
std::vector<std::tuple<EventListener*, int>> v;
mSinks.insert( { system, v } );
return;
}
auto& sinkVector = mSinks[system];
@@ -109,6 +132,53 @@ int EventManager::RegisterSink( EventListener* sink, std::string system )
return id;
}
int EventManager::RegisterSinkPushStick( EventListener* sink, std::string system )
{
int id = mNextHeighest;
mListeners[id] = sink;
if ( !mStickySinks.count( system ) )
{
std::vector<std::tuple<EventListener*, int>> v;
mStickySinks.insert( { system, v } );
return;
}
auto& sinkVector = mStickySinks[system];
sinkVector.push_back( { sink, id } );
mNextHeighest++;
return id;
}
int EventManager::RegisterSinkUnshift( EventListener* sink, std::string system )
{
int id = mNextHeighest;
mListeners[id] = sink;
if ( !mSinks.count( system ) )
{
RegisterSinkPush( sink, system );
return;
}
auto& sinkVector = mSinks[system];
sinkVector.insert( sinkVector.begin(), { sink, id } );
mNextHeighest++;
return id;
}
void EventManager::MoveSinkLeft( EventListener* sink, std::string system )
{
}
void EventManager::MoveSinkRight( EventListener* sink, std::string system )
{
}
void EventManager::RemoveSource( int dispatcherID, std::string system )
{
@@ -122,8 +192,25 @@ void EventManager::RemoveSink( int listenerID, std::string system )
void EventManager::Dispatch( int dispatcherID, GenericEvent e )
{
std::string targetSink = mSources[dispatcherID];
auto stickySinks = mStickySinks[targetSink];
auto sinks = mSinks[targetSink];
if ( !stickySinks.empty() )
{
for ( auto& listenerPair : stickySinks )
{
EventListener* listener = std::get<0>( listenerPair );
bool handled = listener->EventRecieved( e );
if ( handled ) e.Handled = handled;
if ( e.Handled )
{
// destroy event
return;
}
}
}
if ( sinks.empty() )
{
return;
@@ -138,7 +225,7 @@ void EventManager::Dispatch( int dispatcherID, GenericEvent e )
if ( e.Handled )
{
// destroy event
break;
return;
}
}
}

35
Aeon/Core/Events.hpp
View File

@@ -82,13 +82,22 @@ public:
EventListener();
virtual ~EventListener();
void PushRegisterAsSink( std::string system );
void PushStickyRegisterAsSink( std::string system );
void EmplaceRegisterAsSink( std::string system );
// Pushes sink to the top of the listener stack
// underneath the stuck listeners
void PushThisAsSink( std::string system );
// Pushes sink to the top of the listener stack
// with all of the other "stuck" listeners
void PushAndStickThisAsSink( std::string system );
// Pushes sink to the bottom of the listener stack
void UnshiftThisAsSink( std::string system );
void ShiftSinkLeft( std::string forSystem );
void ShiftSinkRight( std::string forSystem );
void DeRegisterAsSink( std::string system );
// return true = event handled
// return true = event handled and will not be further
// propogated
virtual bool EventRecieved( GenericEvent& e ) = 0;
private:
@@ -108,7 +117,7 @@ public:
void DeRegisterAsSource( std::string system );
void Dispatch( GenericEvent e );
// no data needed
// no data needed, listeners act on the event happening
void Dispatch( std::string type );
private:
@@ -125,20 +134,28 @@ public:
~EventManager();
int RegisterSource( EventDispatcher* source, std::string system );
int RegisterSink( EventListener* sink, std::string system );
int RegisterSinkPush( EventListener* sink, std::string system );
int RegisterSinkPushStick( EventListener* sink, std::string system );
int RegisterSinkUnshift( EventListener* sink, std::string system );
void MoveSinkLeft( EventListener* sink, std::string system );
void MoveSinkRight( EventListener* sink, std::string system );
void RemoveSource( int dispatcherID, std::string system );
void RemoveSink( int listenerID, std::string system );
void Dispatch( int dispatcherID, GenericEvent e );
private:
// indexed by listener ID
// indexed by listener ID for quick lookup
std::map<int, const EventListener*> mListeners;
// indexed by dispatcher ID
// indexed by dispatcher ID for itteration
std::map<int, std::string> mSources;
// indexed by (sink) system ID
// indexed by (sink) system ID (string)
// their position in the vector is their layer
std::map<std::string, std::vector<std::tuple<EventListener*, int>>> mStickySinks;
std::map<std::string, std::vector<std::tuple<EventListener*, int>>> mSinks;
int mNextHeighest = 0;