X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fprops%2Fcondition.hxx;h=128cdfaf0c85fd374c723616af6335712a2c9f12;hb=1a5467aec86437001faf009310c54c2b2a7851a6;hp=719f68795411ad609664557e4079d5494f3be63f;hpb=0759dbcdc9dc0eb0b1f2b50886c015d86eae348d;p=simgear.git

diff --git a/simgear/props/condition.hxx b/simgear/props/condition.hxx
index 719f6879..128cdfaf 100644
--- a/simgear/props/condition.hxx
+++ b/simgear/props/condition.hxx
@@ -10,11 +10,12 @@
 #ifndef __SG_CONDITION_HXX
 #define __SG_CONDITION_HXX
 
-#include <simgear/debug/logstream.hxx>
-#include <simgear/props/props.hxx>
-#include <simgear/props/props_io.hxx>
+#include <set>
 #include <simgear/structure/SGReferenced.hxx>
-
+#include <simgear/structure/SGSharedPtr.hxx>
+
+class SGPropertyNode;
+
 ////////////////////////////////////////////////////////////////////////
 // Conditions.
 ////////////////////////////////////////////////////////////////////////
@@ -34,6 +35,7 @@ public:
   SGCondition ();
   virtual ~SGCondition ();
   virtual bool test () const = 0;
+  virtual void collectDependentProperties(std::set<const SGPropertyNode*>& props) const { }
 };