vtkPiecewisePointHandleItem.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkPiecewisePointHandleItem.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 vtkPiecewisePointHandleItem_h
#define vtkPiecewisePointHandleItem_h
 
#include "vtkChartsCoreModule.h" // For export macro
#include "vtkContextItem.h"
#include "vtkWeakPointer.h" // Needed for weak pointer to the PiecewiseFunction.
 
class vtkContext2D;
class vtkPiecewiseFunction;
class vtkCallbackCommand;
class vtkAbstractContextItem;
 
class VTKCHARTSCORE_EXPORT vtkPiecewisePointHandleItem : public vtkContextItem
{
public:
  vtkTypeMacro(vtkPiecewisePointHandleItem, vtkContextItem);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  static vtkPiecewisePointHandleItem* New();
  static void CallRedraw(vtkObject* sender, unsigned long event, void* receiver, void* params);
 
  void SetParent(vtkAbstractContextItem* parent) override;
 
  bool Paint(vtkContext2D* painter) override;
 
 
  vtkSetMacro(CurrentPointIndex, vtkIdType);
  vtkGetMacro(CurrentPointIndex, vtkIdType);
 
 
  virtual void SetPiecewiseFunction(vtkPiecewiseFunction* piecewiseFunc);
  vtkWeakPointer<vtkPiecewiseFunction> GetPiecewiseFunction();
 
  int IsOverHandle(float* pos);
 
  bool Hit(const vtkContextMouseEvent& mouse) override;
 
  bool MouseMoveEvent(const vtkContextMouseEvent& mouse) override;
 
  bool MouseButtonPressEvent(const vtkContextMouseEvent& mouse) override;
 
  bool MouseButtonReleaseEvent(const vtkContextMouseEvent& mouse) override;
 
protected:
  vtkPiecewisePointHandleItem();
  ~vtkPiecewisePointHandleItem() override;
 
  virtual void Redraw();
 
  int MouseOverHandleIndex;
  vtkIdType CurrentPointIndex;
  float HandleRadius;
 
  vtkWeakPointer<vtkPiecewiseFunction> PiecewiseFunction;
  vtkCallbackCommand* Callback;
 
private:
  vtkPiecewisePointHandleItem(const vtkPiecewisePointHandleItem&) = delete;
  void operator=(const vtkPiecewisePointHandleItem&) = delete;
 
  class InternalPiecewisePointHandleInfo;
  InternalPiecewisePointHandleInfo* Internal;
};
 
#endif // vtkPiecewisePointHandleItem_h