#pragma once

#ifndef STROKE_DEFORMATION_H

#define STROKE_DEFORMATION_H

/**

 * @author  Fabrizio Morciano <fabrizio.morciano@gmail.com></fabrizio.morciano@gmail.com>

 */

#include "tcommon.h"

#undef DVAPI

#undef DVVAR

#ifdef TNZEXT_EXPORTS

#define DVAPI DV_EXPORT_API

#define DVVAR DV_EXPORT_VAR

#else

#define DVAPI DV_IMPORT_API

#define DVVAR DV_IMPORT_VAR

#endif

#include "tgeometry.h"

//#include "ext/TriParam.h"

#include "ext/Types.h"

#include "ext/ContextStatus.h"

#include <vector></vector>

// forward declarations

class TStroke;

#if defined(_WIN32) && (_MSC_VER <= 1200)

// to avoid annoying warning

#pragma warning(push)

#pragma warning(disable : 4251)

#endif

namespace ToonzExt {

class Designer;

class Potential;

class StrokeParametricDeformer;

class StrokeDeformationImpl;

//===========================================================================

/**

   * @brief This class is the interface for manipulation

   *        algorihms.

   *

   * StrokeDeformation is a wrapper for for StrokeDeformationImpl,

   * its function is to verify state and parameteres before

   * to call the implementation methods of deformation.

   *

   * There is an internal status to verify that actions:

   * @arg @c CREATED on constructor

   * @arg @c ACTIVE on active

   * @arg @c UPDATING on updating

   * @arg @c DEACTIVE on deactive

   *

   * If some error of state occurs @c reset method is called.

   * ContextStatus contains information about deformation parameter,

   * and it occurs to reduce the number of parameters required.

   */

class DVAPI StrokeDeformation {

private:

  StrokeDeformationImpl *deformationImpl_;

  /**

*@brief Internal status.

*/

  enum StrokeDeformationState { CREATED, ACTIVE, UPDATING, DEACTIVE, RESETTED };

  StrokeDeformationState state_;

  /**

*@brief Recover from an invalid state

*/

  void recover();

  /**

*@brief Retrieve the current deformator.

*/

  StrokeDeformationImpl *retrieveDeformator(const ContextStatus *status);

public:

  StrokeDeformation();

  ~StrokeDeformation();

  /**

*@brief Init deformation and add control points.

*/

  void activate(const ContextStatus *);

  /**

*@brief Modify stroke.

*/

  void update(const TPointD &delta);

  /**

*@brief Return a stroke deformed.

*@return A stroke deformed.

*/

  TStroke *deactivate();

  /**

*@brief Clear inner status of Deformation.

*/

  void reset();

  /**

*@brief Just select correct Deformation.

*/

  void check(const ContextStatus *);

  /**

*@brief Apply a designer on current deformation.

*/

  void draw(Designer *);

  /**

*@brief Retrieve valid extremes for current manipulator/deformator.

*/

  ToonzExt::Interval getExtremes() const;

  /**

*@brief Return the stroke selected from user.

*/

  const TStroke *getStroke() const;

  /**

*@brief Return the stroke selected from user.

*/

  const TStroke *getCopiedStroke() const;

  /**

*@brief Return a reference to the stroke created to be manipulated.

*@note This stroke is different from stroke selected by user.

*@sa getStroke

*/

  const TStroke *getTransformedStroke() const;

  /**

*@brief Return the internal status of current deformation.

*@sa ContextStatus

*/

  const ContextStatus *getStatus() const;

  /**

*@brief Retrieve cursor associated to current deformator.

*/

  int getCursorId() const;

#ifdef _DEBUG

  /**

*@brief Return the potential used in implementation.

*@note This is useful just for debug, please do not use directly.

*@sa Potential

*/

  const Potential *getPotential() const;

  /**

*@brief Return the potential used in implementation.

*@note This is useful just for debug, please do not use directly.

*@sa Potential

*/

  const StrokeDeformationImpl *getDeformationImpl() const;

#endif

};

}

#if defined(_WIN32) && (_MSC_VER <= 1200)

#pragma warning(pop)

#endif

#endif /* STROKE_DEFORMATION_H */

//-----------------------------------------------------------------------------

//  End Of File

//-----------------------------------------------------------------------------