vtkLabeledDataMapper.h

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

  Program:   Visualization Toolkit
  Module:    vtkLabeledDataMapper.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 vtkLabeledDataMapper_h
#define vtkLabeledDataMapper_h

#include "vtkRenderingLabelModule.h" // For export macro
#include "vtkMapper2D.h"

#include <cassert> // For assert macro

class vtkDataObject;
class vtkDataSet;
class vtkTextMapper;
class vtkTextProperty;
class vtkTransform;

#define VTK_LABEL_IDS        0
#define VTK_LABEL_SCALARS    1
#define VTK_LABEL_VECTORS    2
#define VTK_LABEL_NORMALS    3
#define VTK_LABEL_TCOORDS    4
#define VTK_LABEL_TENSORS    5
#define VTK_LABEL_FIELD_DATA 6

class VTKRENDERINGLABEL_EXPORT vtkLabeledDataMapper : public vtkMapper2D
{
public:
  static vtkLabeledDataMapper *New();

  vtkTypeMacro(vtkLabeledDataMapper,vtkMapper2D);
  void PrintSelf(ostream& os, vtkIndent indent);


  vtkSetStringMacro(LabelFormat);
  vtkGetStringMacro(LabelFormat);


  vtkSetMacro(LabeledComponent,int);
  vtkGetMacro(LabeledComponent,int);


  void SetFieldDataArray(int arrayIndex);
  vtkGetMacro(FieldDataArray,int);


  void SetFieldDataName(const char *arrayName);
  vtkGetStringMacro(FieldDataName);

  virtual void SetInputData(vtkDataObject*);

  vtkDataSet *GetInput();


  vtkSetMacro(LabelMode, int);
  vtkGetMacro(LabelMode, int);
  void SetLabelModeToLabelIds() {this->SetLabelMode(VTK_LABEL_IDS);};
  void SetLabelModeToLabelScalars() {this->SetLabelMode(VTK_LABEL_SCALARS);};
  void SetLabelModeToLabelVectors() {this->SetLabelMode(VTK_LABEL_VECTORS);};
  void SetLabelModeToLabelNormals() {this->SetLabelMode(VTK_LABEL_NORMALS);};
  void SetLabelModeToLabelTCoords() {this->SetLabelMode(VTK_LABEL_TCOORDS);};
  void SetLabelModeToLabelTensors() {this->SetLabelMode(VTK_LABEL_TENSORS);};
  void SetLabelModeToLabelFieldData()
            {this->SetLabelMode(VTK_LABEL_FIELD_DATA);};


  virtual void SetLabelTextProperty(vtkTextProperty *p)
    { this->SetLabelTextProperty(p, 0); }
  virtual vtkTextProperty* GetLabelTextProperty()
    { return this->GetLabelTextProperty(0); }
  virtual void SetLabelTextProperty(vtkTextProperty *p, int type);
  virtual vtkTextProperty* GetLabelTextProperty(int type);


  void RenderOpaqueGeometry(vtkViewport* viewport, vtkActor2D* actor);
  void RenderOverlay(vtkViewport* viewport, vtkActor2D* actor);

  virtual void ReleaseGraphicsResources(vtkWindow *);


  vtkGetObjectMacro(Transform, vtkTransform);
  void SetTransform(vtkTransform* t);

  enum Coordinates
  {
    WORLD=0,           
    DISPLAY=1          
  };


  vtkGetMacro(CoordinateSystem,int);
  vtkSetClampMacro(CoordinateSystem,int,WORLD,DISPLAY);
  void CoordinateSystemWorld() { this->SetCoordinateSystem( vtkLabeledDataMapper::WORLD ); }
  void CoordinateSystemDisplay() { this->SetCoordinateSystem( vtkLabeledDataMapper::DISPLAY ); }

  virtual vtkMTimeType GetMTime();


  vtkGetMacro(NumberOfLabels, int)


  void GetLabelPosition(int label, double pos[3])
  {
    assert("label index range" && label >= 0 && label < this->NumberOfLabels);
    pos[0] = this->LabelPositions[3 * label];
    pos[1] = this->LabelPositions[3 * label + 1];
    pos[2] = this->LabelPositions[3 * label + 2];
  }

  const char *GetLabelText(int label);

protected:
  vtkLabeledDataMapper();
  ~vtkLabeledDataMapper();

  vtkDataSet *Input;

  char  *LabelFormat;
  int   LabelMode;
  int   LabeledComponent;
  int   FieldDataArray;
  char  *FieldDataName;
  int CoordinateSystem;

  vtkTimeStamp BuildTime;

  int NumberOfLabels;
  int NumberOfLabelsAllocated;
  vtkTextMapper **TextMappers;
  double* LabelPositions;
  vtkTransform *Transform;

  virtual int FillInputPortInformation(int, vtkInformation*);

  void AllocateLabels(int numLabels);
  void BuildLabels();
  void BuildLabelsInternal(vtkDataSet*);

  class Internals;
  Internals* Implementation;

private:
  vtkLabeledDataMapper(const vtkLabeledDataMapper&) VTK_DELETE_FUNCTION;
  void operator=(const vtkLabeledDataMapper&) VTK_DELETE_FUNCTION;
};

#endif