text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    vtkPolyDataItem.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.
  
  =========================================================================*/
  /**
   * @class   vtkPolyDataItem
   * @brief   Filter that translate a vtkPolyData 2D mesh into vtkContextItems.
   *
   * @warning
   * The input vtkPolyData should be a 2D mesh.
   *
   */
  
  #ifndef vtkPolyDataItem_h
  #define vtkPolyDataItem_h
  
  #include "vtkContextItem.h"
  #include "vtkRenderingContext2DModule.h" // For export macro
  
  class vtkPolyData;
  class vtkUnsignedCharArray;
  
  class VTKRENDERINGCONTEXT2D_EXPORT vtkPolyDataItem : public vtkContextItem
  {
  public:
    vtkTypeMacro(vtkPolyDataItem, vtkContextItem);
    void PrintSelf(ostream& os, vtkIndent indent) override;
  
    static vtkPolyDataItem* New();
  
    /**
     * Paint event for the item.
     */
    bool Paint(vtkContext2D* painter) override;
  
    /**
     * Set the PolyData of the item.
     */
    void SetPolyData(vtkPolyData* polyData);
  
    /**
     * Set mapped colors. User-selected scalars are mapped to a color lookup
     * table externally.
     */
    void SetMappedColors(vtkUnsignedCharArray* colors);
  
    /**
     * Get the image of the item.
     */
    vtkGetObjectMacro(PolyData, vtkPolyData);
  
    /**
     * Set the position of the bottom corner of the image.
     */
    vtkSetVector2Macro(Position, float);
  
    /**
     * Set the data scalar mode.
     */
    vtkSetMacro(ScalarMode, int);
  
  protected:
    vtkPolyDataItem();
    ~vtkPolyDataItem() override;
  
    class DrawHintsHelper;
    DrawHintsHelper* HintHelper;
  
    float Position[2];
  
    vtkPolyData* PolyData;
  
    vtkUnsignedCharArray* MappedColors;
  
    int ScalarMode;
  
  private:
    vtkPolyDataItem(const vtkPolyDataItem&) = delete;
    void operator=(const vtkPolyDataItem&) = delete;
  };
  
  #endif
  