Improve (mostly Canvas event related) documentation.

[simgear.git] / simgear / structure / event_mgr.cxx

diff --git a/simgear/structure/event_mgr.cxx b/simgear/structure/event_mgr.cxx
index b855fae2db941d9e16c58dbe4ba6ab5ff7ad388b..503bd974e7f9c551604c958787e5d191a9b09d0a 100644 (file)
--- a/simgear/structure/event_mgr.cxx
+++ b/simgear/structure/event_mgr.cxx
@@ -38,12 +38,39 @@ void SGTimer::run()
     (*callback)();
 }
 
+SGEventMgr::SGEventMgr() :
+    _inited(false)
+{
+    
+}
+
+SGEventMgr::~SGEventMgr()
+{
+    
+}
+
 void SGEventMgr::unbind()
 {
     _freezeProp.clear();
     _rtProp.clear();
 }
 
+void SGEventMgr::init()
+{
+    if (_inited) {
+        SG_LOG(SG_GENERAL, SG_WARN, "duplicate init of SGEventMgr");
+    }
+    _inited = true;
+}
+
+void SGEventMgr::shutdown()
+{
+    _inited = false;
+    
+    _simQueue.clear();
+    _rtQueue.clear();
+}
+
 void SGEventMgr::update(double delta_time_sec)
 {
     _simQueue.update(delta_time_sec);
@@ -54,6 +81,13 @@ void SGEventMgr::update(double delta_time_sec)
 
 void SGEventMgr::removeTask(const std::string& name)
 {
+    // due to the ordering of the event-mgr in FG, tasks can be removed
+    // after we are shutdown (and hence, have all been cleared). Guard
+    // against this so we don't generate warnings below.
+    if (!_inited) {
+        return;
+    }
+    
   SGTimer* t = _simQueue.findByName(name);
   if (t) {
     _simQueue.remove(t);
@@ -87,7 +121,7 @@ SGTimerQueue::SGTimerQueue(int size)
 
     _table = new HeapEntry[_tableSize];
     for(int i=0; i<_tableSize; i++) {
-       _table[i].pri = 0;
+           _table[i].pri = 0;
         _table[i].timer = 0;
     }
 }
@@ -95,14 +129,24 @@ SGTimerQueue::SGTimerQueue(int size)
 
 SGTimerQueue::~SGTimerQueue()
 {
+    clear();
+    delete[] _table;
+}
+
+void SGTimerQueue::clear()
+{
+    // delete entries
     for(int i=0; i<_numEntries; i++) {
         delete _table[i].timer;
-        _table[i].timer = 0;
     }
+    
     _numEntries = 0;
-    delete[] _table;
-    _table = 0;
-    _tableSize = 0;
+    
+    // clear entire table to empty
+    for(int i=0; i<_tableSize; i++) {
+           _table[i].pri = 0;
+        _table[i].timer = 0;
+    }
 }
 
 void SGTimerQueue::update(double deltaSecs)