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diff --git a/kig/objects/circle_imp.h b/kig/objects/circle_imp.h
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+// Copyright (C)  2003  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_CIRCLE_IMP_H
+#define KIG_OBJECTS_CIRCLE_IMP_H
+
+#include "conic_imp.h"
+
+/**
+ * An ObjectImp representing a circle.  This class is a subclass of
+ * ConicImp, ensuring that a circle can be used as a conic.
+ */
+class CircleImp
+  : public ConicImp
+{
+  Coordinate mcenter;
+  double mradius;
+public:
+  typedef ConicImp Parent;
+  /**
+   * Returns the ObjectImpType representing the CircleImp type..
+   */
+  static const ObjectImpType* stype();
+
+  /**
+   * Construct a Circle with a given center and radius.
+   */
+  CircleImp( const Coordinate& center, double radius );
+  ~CircleImp();
+  CircleImp* copy() const;
+
+  ObjectImp* transform( const Transformation& ) const;
+
+  void draw( KigPainter& p ) const;
+  bool contains( const Coordinate& p, int width, const KigWidget& ) const;
+  bool inRect( const Rect& r, int width, const KigWidget& ) const;
+  bool valid() const;
+  Rect surroundingRect() const;
+
+  double getParam( const Coordinate& point, const KigDocument& ) const;
+  const Coordinate getPoint( double param, const KigDocument& ) const;
+
+  const uint numberOfProperties() const;
+  const QCStringList properties() const;
+  const QCStringList propertiesInternalNames() const;
+  ObjectImp* property( uint which, const KigDocument& w ) const;
+  const char* iconForProperty( uint which ) const;
+  const ObjectImpType* impRequirementForProperty( uint which ) const;
+  bool isPropertyDefinedOnOrThroughThisImp( uint which ) const;
+
+  const ObjectImpType* type() const;
+  void visit( ObjectImpVisitor* vtor ) const;
+
+  /**
+   * Return the center of this circle.
+   */
+  const Coordinate center() const;
+  /**
+   * Return the radius of this circle.
+   */
+  double radius() const;
+  /**
+   * Return the square radius of this circle.  Use this in preference
+   * to sqr( radius() ).
+   */
+  double squareRadius() const;
+  /**
+   * Return the surface of this circle.
+   */
+  double surface() const;
+  /**
+   * Return the circumference of this circle.
+   */
+  double circumference() const;
+
+  // trivial versions of the conic information functions..
+  /**
+   * Always returns 1, since a circle always is an ellipse.
+   */
+  int conicType() const;
+  const ConicCartesianData cartesianData() const;
+  const ConicPolarData polarData() const;
+  /**
+   * The first focus of a circle is simply its center.
+   */
+  Coordinate focus1() const;
+  /**
+   * The second focus of a circle is simply its center.
+   */
+  Coordinate focus2() const;
+
+  /**
+   * Return a string containing the cartesian equation of this circle.
+   * This will be of the form "x^2 + y^2 + a x + b y + c = 0"
+   */
+  QString cartesianEquationString( const KigDocument& w ) const;
+  /**
+   * Return a string containing the cartesian equation of this circle.
+   * This will be of the form "( x - x0 )^2 + ( y - y0 )^2 = r^2"
+   */
+  QString simplyCartesianEquationString( const KigDocument& w ) const;
+  /**
+   * Return a string containing the polar equation of this circle.
+   * This will be of the form "rho = r  [centered at p]"
+   */
+  QString polarEquationString( const KigDocument& w ) const;
+
+  bool equals( const ObjectImp& rhs ) const;
+};
+
+#endif