vtkLabeledContourPolyDataItem.h

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

  Program:   Visualization Toolkit
  Module:    vtkLabeledContourPolyDataItem.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 vtkLabeledContourPolyDataItem_h
#define vtkLabeledContourPolyDataItem_h

#include "vtkRect.h" // For vtkRect/vtkVector/vtkTuple
#include "vtkRenderingContext2DModule.h" // For export macro
#include "vtkPolyDataItem.h"
#include "vtkSmartPointer.h" // For vtkSmartPointer

class vtkActor;
class vtkContext2D;
class vtkDoubleArray;
class vtkRenderer;
class vtkTextActor3D;
class vtkTextProperty;
class vtkTextPropertyCollection;
struct LabelHelper;

class VTKRENDERINGCONTEXT2D_EXPORT vtkLabeledContourPolyDataItem : public vtkPolyDataItem
{
public:
  vtkTypeMacro(vtkLabeledContourPolyDataItem, vtkPolyDataItem);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  static vtkLabeledContourPolyDataItem *New();

  bool Paint(vtkContext2D* painter) override;

  virtual void SetTextProperty(vtkTextProperty *tprop);


  virtual void SetTextProperties(vtkTextPropertyCollection *coll);
  virtual vtkTextPropertyCollection *GetTextProperties();


  virtual vtkDoubleArray* GetTextPropertyMapping();
  virtual void SetTextPropertyMapping(vtkDoubleArray *mapping);


  vtkSetMacro(LabelVisibility, bool)
  vtkGetMacro(LabelVisibility, bool)
  vtkBooleanMacro(LabelVisibility, bool)


  vtkSetMacro(SkipDistance, double)
  vtkGetMacro(SkipDistance, double)

protected:
  vtkLabeledContourPolyDataItem();
  ~vtkLabeledContourPolyDataItem() override;

  virtual void ComputeBounds();

  void Reset();

  bool CheckInputs();
  bool CheckRebuild();
  bool PrepareRender();
  bool PlaceLabels();
  bool ResolveLabels();
  virtual bool CreateLabels();
  bool RenderBackgrounds(vtkContext2D* painter);
  bool RenderLabels(vtkContext2D* painter);

  bool AllocateTextActors(vtkIdType num);
  bool FreeTextActors();

  double SkipDistance;

  bool LabelVisibility;
  vtkIdType NumberOfTextActors;
  vtkIdType NumberOfUsedTextActors;
  vtkTextActor3D **TextActors;

  LabelHelper** LabelHelpers;

  vtkSmartPointer<vtkTextPropertyCollection> TextProperties;
  vtkSmartPointer<vtkDoubleArray> TextPropertyMapping;

  vtkTimeStamp LabelBuildTime;

private:
  vtkLabeledContourPolyDataItem(const vtkLabeledContourPolyDataItem&) = delete;
  void operator=(const vtkLabeledContourPolyDataItem&) = delete;

  struct Private;
  Private *Internal;
};

#endif