dox/Charts/vtkControlPointsItem.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkControlPointsItem.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/

#ifndef __vtkControlPointsItem_h
#define __vtkControlPointsItem_h

#include "vtkPlot.h"
#include "vtkCommand.h" // For vtkCommand enum

class vtkCallbackCommand;
class vtkContext2D;
class vtkPoints2D;
class vtkTransform2D;

class VTK_CHARTS_EXPORT vtkControlPointsItem: public vtkPlot
{
public:
  vtkTypeMacro(vtkControlPointsItem, vtkPlot);
  virtual void PrintSelf(ostream &os, vtkIndent indent);

  enum {
    CurrentPointChangedEvent = vtkCommand::UserEvent,
    CurrentPointEditEvent
  };

  virtual void GetBounds(double bounds[4]);


  vtkSetVector4Macro(UserBounds, double);
  vtkGetVector4Macro(UserBounds, double)

  virtual bool Paint(vtkContext2D *painter);

  void SelectPoint(vtkIdType pointId);

  void SelectPoint(double* currentPoint);

  void SelectAllPoints();

  void DeselectPoint(vtkIdType pointId);

  void DeselectPoint(double* currentPoint);

  void DeselectAllPoints();

  void ToggleSelectPoint(vtkIdType pointId);

  void ToggleSelectPoint(double* currentPoint);

  virtual bool SelectPoints(const vtkVector2f& min, const vtkVector2f& max);

  vtkIdType FindPoint(double* pos);

  bool IsOverPoint(double* pos, vtkIdType pointId);

  vtkIdType GetControlPointId(double* pos);


  vtkGetMacro(StrokeMode, bool);


  vtkSetMacro(SwitchPointsMode, bool);
  vtkGetMacro(SwitchPointsMode, bool);

  virtual vtkIdType AddPoint(double* newPos);

  virtual vtkIdType RemovePoint(double* pos);

  virtual int GetNumberOfPoints()const = 0;


  virtual void GetControlPoint(vtkIdType index, double *point) = 0;
  // Description:
  // Sets the x and y coordinates as well as the midpoint and sharpness
  // of the control point corresponding to the index.
  virtual void SetControlPoint(vtkIdType index, double *point) = 0;

  vtkIdType GetCurrentPoint()const;

  void SetCurrentPoint(vtkIdType index);

  void ResetBounds();

protected:
  vtkControlPointsItem();
  virtual ~vtkControlPointsItem();

  static void CallComputePoints(vtkObject* sender, unsigned long event, void* receiver, void* params);


  virtual void ComputePoints();
  virtual unsigned long int GetControlPointsMTime() =0;

  virtual bool Hit(const vtkContextMouseEvent &mouse);

  bool ClampPos(double pos[2]);


  void DrawUnselectedPoints(vtkContext2D* painter);
  void DrawSelectedPoints(vtkContext2D* painter);
  virtual void DrawPoint(vtkContext2D* painter, vtkIdType index);


  virtual bool MouseButtonPressEvent(const vtkContextMouseEvent &mouse);
  virtual bool MouseDoubleClickEvent(const vtkContextMouseEvent &mouse);

  virtual bool MouseMoveEvent(const vtkContextMouseEvent &mouse);

  void MoveCurrentPoint(const vtkVector2f& newPos);
  vtkIdType MovePoint(vtkIdType point, const vtkVector2f& newPos);
  void MovePoints(float tX, float tY);
  void Stroke(const vtkVector2f& newPos);
  virtual void EditPoint(float vtkNotUsed(tX), float vtkNotUsed(tY));
  virtual bool MouseButtonReleaseEvent(const vtkContextMouseEvent &mouse);

  vtkCallbackCommand* Callback;
  vtkIdType           CurrentPoint;

  double              Bounds[4];
  double              UserBounds[4];

  vtkTransform2D*     Transform;
  float               ScreenPointRadius;
  float               ItemPointRadius2;

  bool                StrokeMode;
  bool                SwitchPointsMode;
  bool                MouseMoved;
  bool                EnforceValidFunction;
  vtkIdType           PointToDelete;
  bool                PointAboutToBeDeleted;
  vtkIdType           PointToToggle;
  bool                PointAboutToBeToggled;
private:
  vtkControlPointsItem(const vtkControlPointsItem &); // Not implemented.
  void operator=(const vtkControlPointsItem &);   // Not implemented.

  vtkIdType RemovePointId(vtkIdType pointId);
  void      ComputeBounds();
};

#endif

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