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diff --git a/kig/objects/common.h b/kig/objects/common.h
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+// Copyright (C)  2002  Dominique Devriese <devriese@kde.org>
+
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+// 02110-1301, USA.
+
+#ifndef KIG_OBJECTS_COMMON_H
+#define KIG_OBJECTS_COMMON_H
+
+#include <set>
+#include <vector>
+#include <qcstring.h>
+#include <qvaluelist.h>
+#include <qstringlist.h>
+#include <cassert>
+#include <klocale.h>
+
+class Coordinate;
+class KigDocument;
+class KigPainter;
+class KigPart;
+class KigWidget;
+class NormalMode;
+class ObjectCalcer;
+class ObjectDrawer;
+class ObjectHolder;
+class ObjectImp;
+class ObjectImpType;
+class ObjectPropertyCalcer;
+class ObjectType;
+class ObjectTypeCalcer;
+class QDomDocument;
+class QDomElement;
+class Rect;
+class ScreenInfo;
+class Transformation;
+
+typedef std::vector<const ObjectImp*> Args;
+typedef QValueList<QCString> QCStringList;
+
+template<typename T>
+void delete_all( T begin, T end )
+{
+  for( ; begin != end; ++begin )
+  {
+    delete *begin;
+  }
+}
+
+/**
+ * get the calcers that the holders represent and their namecalcers
+ */
+std::vector<ObjectCalcer*> getAllCalcers( const std::vector<ObjectHolder*>& os );
+
+/**
+ * get the calcers that the holders represent ( not their namecalcers )
+ */
+std::vector<ObjectCalcer*> getCalcers( const std::vector<ObjectHolder*>& os );
+
+/**
+ * The below is a trick.  ObjectType's implement the singleton
+ * pattern.  There can be only one of them at each time.  This one
+ * instance of them needs to be constructed at some time, within the
+ * following restrictions:
+ *
+ * 1. They need to be constructed in the right order: if one ObjectType
+ * uses another in its constructor, the other needs to be constructed
+ * first.  To achieve this, we use a scheme with ::instance()
+ * functions, that have a static variable in the body of the function
+ * ( if we would define them static outside of the function body, C++
+ * would provide no guarantee on the order they would be called in ).
+ *
+ * 2. They need to be constructed before Kig tries to use them.  They
+ * need to be added to the ObjectTypeFactory before anyone tries to
+ * use that class to fetch a type.  The below is a trick to achieve
+ * that in combination with the previous.  Basically, we add a fake
+ * static instance of an empty class that receives the instance of the
+ * ObjectType as an argument to its constructor.  C++ then guarantees
+ * that these things will be constructed before main() is entered.
+ *
+ * Thus, for your own ObjectType classes: use the scheme with the
+ * static ::instance methods, and add
+ * \code
+ * KIG_INSTANTIATE_OBJECT_TYPE_INSTANCE( MyObjectType)
+ * \endcode
+ * to the .cpp file of your class.
+ */
+class FakeClass {
+public:
+  FakeClass( const ObjectType* ) {
+  }
+};
+
+#define KIG_INSTANTIATE_OBJECT_TYPE_INSTANCE( type ) static class FakeClass _fake_class_instance_##type( type::instance() );
+
+#endif