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diff --git a/eeschema/transform.h b/eeschema/transform.h
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+/**
+ * @file transform.h
+ */
+
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2007-2010 Wayne Stambaugh <stambaughw@verizon.net>
+ * Copyright (C) 2007 KiCad Developers, see change_log.txt for contributors.
+ *
+ * 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, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+
+#ifndef _TRANSFORM_H_
+#define _TRANSFORM_H_
+
+#include <wx/gdicmn.h>
+
+class EDA_RECT;
+
+/**
+ * Class for tranforming drawing coordinates for a wxDC device context.
+ *
+ * This probably should be a base class with all pure methods and a derived class
+ * named WXDC_TRANFORM be created.  Then in the future if some new device context
+ * is used, a new transform could be derived from the base class and all the drawable
+ * objects would have to do is provide overloaded draw methods to use the new transorm.
+ */
+class TRANSFORM
+{
+public:
+    int x1;
+    int y1;
+    int x2;
+    int y2;
+
+    /**
+     * The default construct creates a tranform that draws object is the normal orientation.
+     */
+    TRANSFORM() : x1( 1 ), y1( 0 ), x2( 0 ), y2( -1 ) {}
+
+    TRANSFORM( int x1, int y1, int x2, int y2 ) : x1( x1 ), y1( y1 ), x2( x2 ), y2( y2 ) {}
+
+    TRANSFORM& operator=( const TRANSFORM& aTransform );
+
+    bool operator==( const TRANSFORM& aTransform ) const;
+
+    bool operator!=( const TRANSFORM& aTransform ) const { return !( *this == aTransform ); }
+
+   /**
+    * Calculate a new coordinate according to the mirror/rotation transform.
+    * Useful to calculate actual coordinates of a point
+    * from coordinates relative to a component
+    * which are given for a non rotated, non mirrored item
+    * @param aPoint = The position to transform
+    * @return The transformed coordinate.
+    */
+    wxPoint TransformCoordinate( const wxPoint& aPoint ) const;
+
+   /**
+    * Calculate a new rect according to the mirror/rotation transform.
+    * Useful to calculate actual coordinates of a point
+    * from coordinates relative to a component
+    * which are given for a non rotated, non mirrored item
+    * @param aRect = The rectangle to transform
+    * @return The transformed rectangle.
+    */
+    EDA_RECT TransformCoordinate( const EDA_RECT& aRect ) const;
+
+    /**
+    * Calculate the Inverse mirror/rotation transform.
+    * Useful to calculate coordinates relative to a component
+    * which must be for a non rotated, non mirrored item
+    * from the actual coordinate.
+    * @return The inverse transform.
+    */
+    TRANSFORM InverseTransform( ) const;
+
+   /**
+    * Calculate new angles according to the transform.
+    *
+    * @param aAngle1 = The first angle to transform
+    * @param aAngle2 = The second angle to transform
+    * @return True if the angles were swapped during the transform.
+    */
+    bool MapAngles( int* aAngle1, int* aAngle2 ) const;
+};
+
+
+#endif    // _TRANSFORM_H_