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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkLabeledDataMapper.h,v $
  Language:  C++
  Date:      $Date: 2001/11/13 14:17:22 $
  Version:   $Revision: 1.25 $

Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/
// .NAME vtkLabeledDataMapper - draw text labels at dataset points
// .SECTION Description
// vtkLabeledDataMapper is a mapper that renders text at dataset
// points. Various items can be labeled including point ids, scalars,
// vectors, normals, texture coordinates, tensors, and field data components.
//
// The format with which the label is drawn is specified using a
// printf style format string. The font attributes of the text can
// also be set (font style, size, bold, italic, shadow). The color of
// the text is controlled by the actor2D's color property (i.e., the
// actor associated with this mapper). 
//
// By default, all the components of multi-component data such as
// vectors, normals, texture coordinates, tensors, and multi-component
// scalars are labeled. However, you can specify a single component if
// you prefer. (Note: the label format specifies the format to use for
// a single component. The label is creating by looping over all components
// and using the label format to render each component.)

// .SECTION Caveats
// Use this filter in combination with vtkSelectVisiblePoints if you want
// to label only points that are visible. If you want to label cells rather
// than points, use the filter vtkCellCenters to generate points at the
// center of the cells. Also, you can use the class vtkIdFilter to
// generate ids as scalars or field data, which can then be labeled.

// .SECTION See Also
// vtkMapper2D vtkActor2D vtkTextMapper vtkSelectVisiblePoints 
// vtkIdFilter vtkCellCenters

#ifndef __vtkLabeledDataMapper_h
#define __vtkLabeledDataMapper_h

#include "vtkMapper2D.h"
#include "vtkTextMapper.h"
#include "vtkDataSet.h"

#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 VTK_RENDERING_EXPORT vtkLabeledDataMapper : public vtkMapper2D
{
public:
  // Description:
  // Instantiate object with font size 12 of font Arial (bolding,
  // italic, shadows on) and %%-#6.3g label format. By default, point ids
  // are labeled.
  static vtkLabeledDataMapper *New();

  vtkTypeMacro(vtkLabeledDataMapper,vtkMapper2D);
  void PrintSelf(ostream& os, vtkIndent indent);
  
  // Description:
  // Draw the text to the screen at each input point.
  void RenderOpaqueGeometry(vtkViewport* viewport, vtkActor2D* actor);
  void RenderOverlay(vtkViewport* viewport, vtkActor2D* actor);

  // Description:
  // Set the input dataset to the mapper.  
  vtkSetObjectMacro(Input, vtkDataSet);
  vtkGetObjectMacro(Input, vtkDataSet);

  // Description:
  // Release any graphics resources that are being consumed by this actor.
  // The parameter window could be used to determine which graphic
  // resources to release.
  virtual void ReleaseGraphicsResources(vtkWindow *);

  // Description:
  // Specify which data to plot: scalars, vectors, normals, texture coords,
  // tensors, or field data. If the data has more than one component, use
  // the method SetLabeledComponent to control which components to plot.
  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);};

  // Description:
  // Set/Get the suggested font size used to label the data.
  // (Suggested because not all font sizes may be available.)
  // The value is expressed in points.
  vtkSetClampMacro(FontSize,int,0,VTK_LARGE_INTEGER);
  vtkGetMacro(FontSize,int);

  // Description:
  // Enable/Disable bolding labels.
  vtkSetMacro(Bold, int);
  vtkGetMacro(Bold, int);
  vtkBooleanMacro(Bold, int);

  // Description:
  // Enable/Disable italicizing labels.
  vtkSetMacro(Italic, int);
  vtkGetMacro(Italic, int);
  vtkBooleanMacro(Italic, int);

  // Description:
  // Enable/Disable creating shadows on the labels. Shadows make 
  // the text easier to read.
  vtkSetMacro(Shadow, int);
  vtkGetMacro(Shadow, int);
  vtkBooleanMacro(Shadow, int);

  // Description:
  // Set/Get the font family for the labels. Three font types 
  // are available: Arial (VTK_ARIAL), Courier (VTK_COURIER), and 
  // Times (VTK_TIMES).
  vtkSetMacro(FontFamily, int);
  vtkGetMacro(FontFamily, int);
  void SetFontFamilyToArial() {this->SetFontFamily(VTK_ARIAL);};
  void SetFontFamilyToCourier() {this->SetFontFamily(VTK_COURIER);};
  void SetFontFamilyToTimes() {this->SetFontFamily(VTK_TIMES);};

  // Description:
  // Set/Get the format with which to print the labels. The format needs
  // to change depending on what you're trying to print. For example, if
  // you're printing a vector, 3 values are printed, whereas when printing an
  // id only one value is printed. See also the ivar LabeledComponent which
  // can be used to specify the component to print if you want to only print
  // one of several.
  vtkSetStringMacro(LabelFormat);
  vtkGetStringMacro(LabelFormat);

  // Description:
  // Set/Get the component number to label if the data to print has
  // more than one component. For example, all the components of
  // scalars, vectors, normals, etc. are labeled by default
  // (LabeledComponent=(-1)). However, if this ivar is nonnegative,
  // then only the one component specified is labeled.
  vtkSetMacro(LabeledComponent,int);
  vtkGetMacro(LabeledComponent,int);

  // Description:
  // Set/Get the field data array to label. This instance variable is
  // only applicable if field data is labeled.
  vtkSetClampMacro(FieldDataArray,int,0,VTK_LARGE_INTEGER);
  vtkGetMacro(FieldDataArray,int);

protected:
  vtkLabeledDataMapper();
  ~vtkLabeledDataMapper();

  vtkDataSet *Input;
  int LabelMode;

  int   FontSize;
  int   Bold;
  int   Italic;
  int   Shadow;
  int   FontFamily;

  char  *LabelFormat;
  int   LabeledComponent;
  int   FieldDataArray;

  vtkTimeStamp BuildTime;

private:
  int NumberOfLabels;
  int NumberOfLabelsAllocated;
  vtkTextMapper **TextMappers;

private:
  vtkLabeledDataMapper(const vtkLabeledDataMapper&);  // Not implemented.
  void operator=(const vtkLabeledDataMapper&);  // Not implemented.
};

#endif

