X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fprops%2Fcondition.hxx;h=4341c2397e77bd5aa9768f679f980b2f5a0f68c7;hb=645cae184b7bbf3a578f142d874eff20765ba8eb;hp=f18e4b84b210191c7267d2c932ef7f30e509d10f;hpb=3ac5ff0cac4dfecc62e6deb440bb0aa309ff42c9;p=simgear.git

diff --git a/simgear/props/condition.hxx b/simgear/props/condition.hxx
index f18e4b84..4341c239 100644
--- a/simgear/props/condition.hxx
+++ b/simgear/props/condition.hxx
@@ -10,6 +10,7 @@
 #ifndef __SG_CONDITION_HXX
 #define __SG_CONDITION_HXX
 
+#include <set>
 #include <simgear/structure/SGReferenced.hxx>
 #include <simgear/structure/SGSharedPtr.hxx>
 
@@ -34,8 +35,11 @@ public:
   SGCondition ();
   virtual ~SGCondition ();
   virtual bool test () const = 0;
+  virtual void collectDependentProperties(std::set<const SGPropertyNode*>& props) const { }
 };
 
+typedef SGSharedPtr<SGCondition> SGConditionRef;
+
 
 /**
  * Base class for a conditional components.
@@ -54,7 +58,7 @@ public:
   virtual const SGCondition * getCondition () const { return _condition; }
   virtual bool test () const;
 private:
-  SGSharedPtr<SGCondition> _condition;
+  SGConditionRef _condition;
 };