vtkCompositeControlPointsItem.h

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

  Program:   Visualization Toolkit
  Module:    vtkCompositeControlPointsItem.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 vtkCompositeControlPointsItem_h
#define vtkCompositeControlPointsItem_h

#include "vtkChartsCoreModule.h" // For export macro
#include "vtkColorTransferControlPointsItem.h"

class vtkPiecewiseFunction;
class vtkPiecewisePointHandleItem;

class VTKCHARTSCORE_EXPORT vtkCompositeControlPointsItem:
  public vtkColorTransferControlPointsItem
{
public:
  vtkTypeMacro(vtkCompositeControlPointsItem, vtkColorTransferControlPointsItem);
  void PrintSelf(ostream &os, vtkIndent indent) override;

  static vtkCompositeControlPointsItem* New();

  virtual void SetColorTransferFunction(vtkColorTransferFunction* function);


  void SetOpacityFunction(vtkPiecewiseFunction* opacity);
  vtkGetObjectMacro(OpacityFunction, vtkPiecewiseFunction);

  enum PointsFunctionType{
    ColorPointsFunction = 1,
    OpacityPointsFunction = 2,
    ColorAndOpacityPointsFunction = 3
  };

  vtkSetMacro(PointsFunction, int);
  vtkGetMacro(PointsFunction, int);

  vtkIdType AddPoint(double* newPos) override;

  vtkIdType RemovePoint(double* pos) override;


  vtkSetMacro(UseOpacityPointHandles, bool);
  vtkGetMacro(UseOpacityPointHandles, bool);


  bool MouseMoveEvent(const vtkContextMouseEvent &mouse) override;
  bool MouseDoubleClickEvent(const vtkContextMouseEvent &mouse) override;
  bool MouseButtonPressEvent(const vtkContextMouseEvent &mouse) override;

protected:
  vtkCompositeControlPointsItem();
  ~vtkCompositeControlPointsItem() override;

  bool UsingLogScale() override;

  void emitEvent(unsigned long event, void* params) override;

  vtkMTimeType GetControlPointsMTime() override;

  vtkIdType GetNumberOfPoints()const override;
  void DrawPoint(vtkContext2D* painter, vtkIdType index) override;
  void GetControlPoint(vtkIdType index, double* pos)const override;
  void SetControlPoint(vtkIdType index, double *point) override;
  void EditPoint(float tX, float tY) override;
  virtual void EditPointCurve(vtkIdType idx);

  void MergeTransferFunctions();
  void SilentMergeTransferFunctions();

  int                   PointsFunction;
  vtkPiecewiseFunction* OpacityFunction;
  vtkPiecewisePointHandleItem* OpacityPointHandle;
  bool UseOpacityPointHandles;

private:
  vtkCompositeControlPointsItem(const vtkCompositeControlPointsItem &) = delete;
  void operator=(const vtkCompositeControlPointsItem &) = delete;
};

#endif