1 files changed, 22 insertions, 5 deletions

diff --git a/src/FbTk/Signal.hh b/src/FbTk/Signal.hh
index 768ca90..b25fe9a 100644
--- a/src/FbTk/Signal.hh
+++ b/src/FbTk/Signal.hh
@@ -24,6 +24,7 @@
 
 #include "Slot.hh"
 #include <list>
+#include <map>
 #include <vector>
 
 namespace FbTk {
@@ -45,6 +46,8 @@ public:
     typedef Iterator SlotID;
     typedef SlotList::const_iterator ConstIterator;
 
+    virtual ~SignalHolder() { }
+
     /// Remove a specific slot \c id from this signal
     void disconnect(SlotID slotIt) {
         m_slots.erase( slotIt );
@@ -78,6 +81,8 @@ class Signal0: public SignalHolder {
 public:
     typedef Slot0<ReturnType> SlotType;
 
+    virtual ~Signal0() { }
+
     void emit() {
         for ( Iterator it = begin(); it != end(); ++it ) {
             static_cast<SlotType&>(*it)();
@@ -96,6 +101,8 @@ class Signal1: public SignalHolder {
 public:
     typedef Slot1<ReturnType, Arg1> SlotType;
 
+    virtual ~Signal1() { }
+
     void emit(Arg1 arg) {
         for ( Iterator it = begin(); it != end(); ++it ) {
             static_cast<SlotType&>(*it)(arg);
@@ -114,6 +121,8 @@ class Signal2: public SignalHolder {
 public:
     typedef Slot2<ReturnType, Arg1, Arg2> SlotType;
 
+    virtual ~Signal2() { }
+
     void emit(Arg1 arg1, Arg2 arg2) {
         for ( Iterator it = begin(); it != end(); ++it ) {
             static_cast<SlotType&>(*it)(arg1, arg2);
@@ -131,6 +140,8 @@ class Signal3: public SignalHolder {
 public:
     typedef Slot3<ReturnType, Arg1, Arg2, Arg3> SlotType;
 
+    virtual ~Signal3() { }
+
     void emit(Arg1 arg1, Arg2 arg2, Arg3 arg3) {
         for ( Iterator it = begin(); it != end(); ++it ) {
             static_cast<SlotType&>(*it)(arg1, arg2, arg3);
@@ -180,16 +191,15 @@ public:
 class SignalTracker {
 public:
     /// Internal type, do not use.
-    typedef std::list< std::pair< SigImpl::SignalHolder*, SigImpl::SignalHolder::SlotID > > Connections;
+    typedef std::map<SigImpl::SignalHolder*, SigImpl::SignalHolder::SlotID> Connections;
     typedef Connections::iterator TrackID; ///< \c ID type for join/leave.
 
-    ~SignalTracker() {
+    virtual ~SignalTracker() {
         // disconnect all connections
         for ( Connections::iterator conIt = m_connections.begin();
-              conIt != m_connections.end(); ) { 
+              conIt != m_connections.end(); ++conIt)
             conIt->first->disconnect( conIt->second );
-            conIt = m_connections.erase( conIt );
-        }
+        m_connections.clear();
     }
 
     /// Starts tracking a signal.
@@ -207,6 +217,13 @@ public:
         m_connections.erase(id);
     }
 
+    /// Leave tracking for a signal
+    /// @param sig the signal to leave
+    template <typename Signal>
+    void leave(Signal &sig) {
+        m_connections.erase(&sig);
+    }
+
 private:
     /// holds all connections to different signals and slots.
     Connections m_connections;