Add optional debugging for calls to ValueNode_*::operator(). export SYNFIG_DEBUG_VAL...

[synfig.git] / synfig-core / trunk / src / synfig / valuenode_timedswap.cpp

diff --git a/synfig-core/trunk/src/synfig/valuenode_timedswap.cpp b/synfig-core/trunk/src/synfig/valuenode_timedswap.cpp
index 1f369a1..378535a 100644 (file)
--- a/synfig-core/trunk/src/synfig/valuenode_timedswap.cpp
+++ b/synfig-core/trunk/src/synfig/valuenode_timedswap.cpp
@@ -6,7 +6,7 @@
 **
 **     \legal
 **     Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
-**     Copyright (c) 2007 Chris Moore
+**     Copyright (c) 2007, 2008 Chris Moore
 **
 **     This package is free software; you can redistribute it and/or
 **     modify it under the terms of the GNU General Public License as
@@ -112,6 +112,9 @@ synfig::ValueNode_TimedSwap::~ValueNode_TimedSwap()
 synfig::ValueBase
 synfig::ValueNode_TimedSwap::operator()(Time t)const
 {
+       if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS"))
+               printf("%s:%d operator()\n", __FILE__, __LINE__);
+
        Time swptime=(*swap_time)(t).get(Time());
        Time swplength=(*swap_length)(t).get(Time());