Added app callback to Drawable.

src/osg/Drawable.cpp

@@ -206,3 +206,22 @@ void Drawable::flushDeletedDisplayLists(uint contextID)
         s_deletedDisplayListCache.erase(citr);
     }
 }
+
+void Drawable::setAppCallback(AppCallback* ac)
+{
+    if (_appCallback==ac) return;
+    
+    int delta = 0;
+    if (_appCallback.valid()) --delta;
+    if (ac) ++delta;
+    
+    if (delta!=0)
+    {
+        for(ParentList::iterator itr=_parents.begin();
+            itr!=_parents.end();
+            ++itr)
+        {
+            (*itr)->setNumChildrenRequiringAppTraversal((*itr)->getNumChildrenRequiringAppTraversal()+delta);
+        }
+    }
+}

src/osg/Geode.cpp

@@ -43,6 +43,11 @@ const bool Geode::addDrawable( Drawable *drawable )
         // register as parent of drawable.
         drawable->addParent(this);
         
+        if (drawable->getAppCallback())
+        {
+            setNumChildrenRequiringAppTraversal(getNumChildrenRequiringAppTraversal()+1);
+        }
+        
         dirtyBound();        
         
         return true;
@@ -59,6 +64,11 @@ const bool Geode::removeDrawable( Drawable *drawable )
         // remove this Geode from the child parent list.
         drawable->removeParent(this);
 
+        if (drawable->getAppCallback())
+        {
+            setNumChildrenRequiringAppTraversal(getNumChildrenRequiringAppTraversal()-1);
+        }
+
         // note ref_ptr<> automatically handles decrementing drawable's reference count.
         _drawables.erase(itr);        
         
@@ -77,7 +87,14 @@ const bool Geode::replaceDrawable( Drawable *origDrawable, Drawable *newDrawable
     DrawableList::iterator itr = findDrawable(origDrawable);
     if (itr!=_drawables.end())
     {
-        
+        int delta = 0;
+        if (origDrawable->getAppCallback()) --delta;
+        if (newDrawable->getAppCallback()) ++delta;
+        if (delta!=0)
+        {
+            setNumChildrenRequiringAppTraversal(getNumChildrenRequiringAppTraversal()+delta);
+        }
+
         // remove from origDrawable's parent list.
         origDrawable->removeParent(this);
         
@@ -88,6 +105,7 @@ const bool Geode::replaceDrawable( Drawable *origDrawable, Drawable *newDrawable
         // register as parent of child.
         newDrawable->addParent(this);
 
+
         dirtyBound();
         
         return true;