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

  Program:   Visualization Toolkit
  Module:    vtkLegendBoxActor.cxx

  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.

=========================================================================*/
#include "vtkLegendBoxActor.h"

#include "vtkActor.h"
#include "vtkCellArray.h"
#include "vtkDoubleArray.h"
#include "vtkImageData.h"
#include "vtkObjectFactory.h"
#include "vtkPlaneSource.h"
#include "vtkPolyData.h"
#include "vtkPolyDataMapper.h"
#include "vtkPolyDataMapper2D.h"
#include "vtkProperty.h"
#include "vtkProperty2D.h"
#include "vtkTextMapper.h"
#include "vtkTextProperty.h"
#include "vtkTexture.h"
#include "vtkTexturedActor2D.h"
#include "vtkTransform.h"
#include "vtkTransformPolyDataFilter.h"
#include "vtkViewport.h"

vtkStandardNewMacro(vtkLegendBoxActor);

vtkCxxSetObjectMacro(vtkLegendBoxActor, EntryTextProperty, vtkTextProperty);

//------------------------------------------------------------------------------
vtkLegendBoxActor::vtkLegendBoxActor()
{
  // Positioning information
  this->PositionCoordinate->SetCoordinateSystemToNormalizedViewport();
  this->PositionCoordinate->SetValue(0.75, 0.75);

  this->Position2Coordinate->SetValue(0.2, 0.2);

  this->LockBorder = 0;
  this->ScalarVisibility = 1;

  // Control font properties
  this->EntryTextProperty = vtkTextProperty::New();
  this->EntryTextProperty->SetBold(0);
  this->EntryTextProperty->SetItalic(0);
  this->EntryTextProperty->SetShadow(0);
  this->EntryTextProperty->SetFontFamily(VTK_ARIAL);
  this->EntryTextProperty->SetJustification(VTK_TEXT_LEFT);
  this->EntryTextProperty->SetVerticalJustification(VTK_TEXT_CENTERED);

  this->Border = 1;
  this->Box = 0;
  this->Padding = 3;

  // Symbols and text strings
  this->NumberOfEntries = 0;
  this->Size = 0;
  this->Colors = nullptr;
  this->Symbol = nullptr;
  this->Transform = nullptr;
  this->SymbolTransform = nullptr;
  this->SymbolMapper = nullptr;
  this->SymbolActor = nullptr;
  this->TextMapper = nullptr;
  this->TextActor = nullptr;

  this->Icon = nullptr;
  this->IconActor = nullptr;
  this->IconMapper = nullptr;
  this->IconTransformFilter = nullptr;
  this->IconTransform = nullptr;
  this->IconImage = nullptr;

  // Construct the border
  this->BorderPolyData = vtkPolyData::New();
  vtkPoints* points = vtkPoints::New();
  points->SetNumberOfPoints(4);
  this->BorderPolyData->SetPoints(points);
  points->Delete();
  vtkCellArray* lines = vtkCellArray::New();
  lines->InsertNextCell(5); // points will be updated later
  lines->InsertCellPoint(0);
  lines->InsertCellPoint(1);
  lines->InsertCellPoint(2);
  lines->InsertCellPoint(3);
  lines->InsertCellPoint(0);
  this->BorderPolyData->SetLines(lines);
  lines->Delete();

  this->BorderMapper = vtkPolyDataMapper2D::New();
  this->BorderMapper->SetInputData(this->BorderPolyData);

  this->BorderActor = vtkActor2D::New();
  this->BorderActor->SetMapper(this->BorderMapper);

  // Construct the box
  this->BoxPolyData = vtkPolyData::New();
  this->BoxPolyData->SetPoints(this->BorderPolyData->GetPoints());
  vtkCellArray* polys = vtkCellArray::New();
  polys->InsertNextCell(4);
  polys->InsertCellPoint(0);
  polys->InsertCellPoint(1);
  polys->InsertCellPoint(2);
  polys->InsertCellPoint(3);
  this->BoxPolyData->SetPolys(polys);
  polys->Delete();

  this->BoxMapper = vtkPolyDataMapper2D::New();
  this->BoxMapper->SetInputData(this->BoxPolyData);

  this->BoxActor = vtkActor2D::New();
  this->BoxActor->SetMapper(this->BoxMapper);

  // Background.
  this->UseBackground = 0;
  this->BackgroundOpacity = 1.0;
  this->BackgroundColor[0] = this->BackgroundColor[1] = this->BackgroundColor[2] = 0.3;
  this->Background = vtkPlaneSource::New();
  this->BackgroundActor = vtkTexturedActor2D::New();
  this->BackgroundMapper = vtkPolyDataMapper2D::New();
  this->BackgroundActor->SetMapper(this->BackgroundMapper);
}

//------------------------------------------------------------------------------
vtkLegendBoxActor::~vtkLegendBoxActor()
{
  this->InitializeEntries();

  if (this->BorderActor)
  {
    this->BorderActor->Delete();
    this->BorderMapper->Delete();
    this->BorderPolyData->Delete();
  }

  if (this->BoxActor)
  {
    this->BoxActor->Delete();
    this->BoxMapper->Delete();
    this->BoxPolyData->Delete();
  }

  if (this->BackgroundActor)
  {
    this->BackgroundActor->Delete();
    this->BackgroundMapper->Delete();
    this->Background->Delete();
  }

  this->SetEntryTextProperty(nullptr);
}

//------------------------------------------------------------------------------
void vtkLegendBoxActor::InitializeEntries()
{
  int i;

  if (this->Size > 0)
  {
    this->Colors->Delete();
    for (i = 0; i < this->Size; i++)
    {
      if (this->Symbol[i])
      {
        this->Symbol[i]->Delete();
      }
      this->Transform[i]->Delete();
      this->SymbolTransform[i]->Delete();
      this->SymbolMapper[i]->Delete();
      this->SymbolActor[i]->Delete();
      if (this->TextMapper[i])
      {
        this->TextMapper[i]->Delete();
        this->TextActor[i]->Delete();
      }

      if (this->IconImage[i])
      {
        this->IconImage[i]->Delete();
      }

      this->Icon[i]->Delete();
      this->IconTransform[i]->Delete();
      this->IconTransformFilter[i]->Delete();
      this->IconMapper[i]->Delete();
      this->IconActor[i]->Delete();
    } // for all entries
    delete[] this->Symbol;
    this->Symbol = nullptr;
    delete[] this->Transform;
    this->Transform = nullptr;
    delete[] this->SymbolTransform;
    this->SymbolTransform = nullptr;
    delete[] this->SymbolMapper;
    this->SymbolMapper = nullptr;
    delete[] this->SymbolActor;
    this->SymbolActor = nullptr;
    delete[] this->TextMapper;
    this->TextMapper = nullptr;
    delete[] this->TextActor;
    this->TextActor = nullptr;

    delete[] this->IconImage;
    this->IconImage = nullptr;
    delete[] this->Icon;
    this->Icon = nullptr;
    delete[] this->IconActor;
    this->IconActor = nullptr;
    delete[] this->IconMapper;
    this->IconMapper = nullptr;
    delete[] this->IconTransform;
    this->IconTransform = nullptr;
    delete[] this->IconTransformFilter;
    this->IconTransformFilter = nullptr;
  } // if entries have been defined
}

//------------------------------------------------------------------------------
void vtkLegendBoxActor::SetNumberOfEntries(int num)
{
  if (num == this->NumberOfEntries)
  {
    return;
  }

  else if (num < this->Size)
  {
    this->NumberOfEntries = num;
  }

  else // allocate space
  {
    int i;

    // Create internal actors, etc.
    vtkDoubleArray* colors = vtkDoubleArray::New();
    colors->SetNumberOfComponents(3);
    colors->SetNumberOfTuples(num);
    vtkTextMapper** textMapper = new vtkTextMapper*[num];
    vtkActor2D** textActor = new vtkActor2D*[num];

    // Symbol
    vtkPolyData** symbol = new vtkPolyData*[num];
    vtkTransform** transform = new vtkTransform*[num];
    vtkTransformPolyDataFilter** symbolTransform = new vtkTransformPolyDataFilter*[num];
    vtkPolyDataMapper2D** symbolMapper = new vtkPolyDataMapper2D*[num];
    vtkActor2D** symbolActor = new vtkActor2D*[num];

    // Icon.
    vtkPlaneSource** icon = new vtkPlaneSource*[num];
    vtkTransform** iconTransform = new vtkTransform*[num];
    vtkTransformPolyDataFilter** iconTransformFilter = new vtkTransformPolyDataFilter*[num];
    vtkPolyDataMapper2D** iconMapper = new vtkPolyDataMapper2D*[num];
    vtkTexturedActor2D** iconActor = new vtkTexturedActor2D*[num];
    vtkImageData** iconImage = new vtkImageData*[num];

    // copy old values
    for (i = 0; i < this->NumberOfEntries; i++)
    {
      colors->SetTuple(i, this->Colors->GetTuple(i));
      textMapper[i] = this->TextMapper[i];
      textMapper[i]->Register(this);
      textActor[i] = this->TextActor[i];
      textActor[i]->Register(this);

      // Symbol.
      symbol[i] = this->Symbol[i];
      if (symbol[i])
      {
        symbol[i]->Register(this);
      }

      transform[i] = this->Transform[i];
      transform[i]->Register(this);

      symbolTransform[i] = this->SymbolTransform[i];
      symbolTransform[i]->Register(this);

      symbolMapper[i] = this->SymbolMapper[i];
      symbolMapper[i]->Register(this);

      symbolActor[i] = this->SymbolActor[i];
      symbolActor[i]->Register(this);

      // Icon.
      icon[i] = this->Icon[i];
      icon[i]->Register(this);

      iconTransform[i] = this->IconTransform[i];
      iconTransform[i]->Register(this);

      iconTransformFilter[i] = this->IconTransformFilter[i];
      iconTransformFilter[i]->Register(this);

      iconMapper[i] = this->IconMapper[i];
      iconMapper[i]->Register(this);

      iconActor[i] = this->IconActor[i];
      iconActor[i]->Register(this);

      iconImage[i] = this->IconImage[i];
      if (iconImage[i])
      {
        iconImage[i]->Register(this);
      }
    }

    // initialize data values
    static double color[3] = { -1.0, -1.0, -1.0 };
    for (i = this->NumberOfEntries; i < num; i++) // initialize
    {
      colors->SetTuple(i, color);
      textMapper[i] = vtkTextMapper::New();
      textActor[i] = vtkActor2D::New();
      textActor[i]->SetMapper(textMapper[i]);

      // Symbol.
      symbol[i] = nullptr;
      transform[i] = vtkTransform::New();
      symbolTransform[i] = vtkTransformPolyDataFilter::New();
      symbolTransform[i]->SetTransform(transform[i]);
      symbolMapper[i] = vtkPolyDataMapper2D::New();
      symbolMapper[i]->SetInputConnection(symbolTransform[i]->GetOutputPort());
      symbolActor[i] = vtkActor2D::New();
      symbolActor[i]->SetMapper(symbolMapper[i]);

      // Icon.
      iconImage[i] = nullptr;

      icon[i] = vtkPlaneSource::New();
      icon[i]->SetPoint1(1.0, 0.0, 0.0);
      icon[i]->SetPoint2(0, 1.0, 0.0);
      icon[i]->SetOrigin(0.0, 0.0, 0.0);
      icon[i]->SetResolution(1, 1);

      iconTransform[i] = vtkTransform::New();

      iconTransformFilter[i] = vtkTransformPolyDataFilter::New();
      iconTransformFilter[i]->SetTransform(iconTransform[i]);

      iconMapper[i] = vtkPolyDataMapper2D::New();
      iconMapper[i]->SetInputConnection(iconTransformFilter[i]->GetOutputPort());

      iconActor[i] = vtkTexturedActor2D::New();
      iconActor[i]->SetMapper(iconMapper[i]);
    }

    // Clear out the old stuff
    this->InitializeEntries();

    // Bring everything up to date
    this->NumberOfEntries = this->Size = num;
    this->Colors = colors;
    this->TextMapper = textMapper;
    this->TextActor = textActor;

    this->Symbol = symbol;
    this->Transform = transform;
    this->SymbolTransform = symbolTransform;
    this->SymbolMapper = symbolMapper;
    this->SymbolActor = symbolActor;

    this->Icon = icon;
    this->IconTransform = iconTransform;
    this->IconTransformFilter = iconTransformFilter;
    this->IconMapper = iconMapper;
    this->IconActor = iconActor;
    this->IconImage = iconImage;
  }

  this->Modified();
}

//------------------------------------------------------------------------------
void vtkLegendBoxActor::SetEntry(int i, vtkPolyData* symbol, const char* string, double color[3])
{
  if (i >= 0 && i < this->NumberOfEntries)
  {
    this->SetEntrySymbol(i, symbol);
    this->SetEntryString(i, string);
    this->SetEntryColor(i, color);
  }
}

//------------------------------------------------------------------------------
void vtkLegendBoxActor::SetEntry(int i, vtkImageData* icon, const char* string, double color[3])
{
  if (i >= 0 && i < this->NumberOfEntries)
  {
    this->SetEntryIcon(i, icon);
    this->SetEntryString(i, string);
    this->SetEntryColor(i, color);
  }
}

//------------------------------------------------------------------------------
void vtkLegendBoxActor::SetEntry(
  int i, vtkPolyData* symbol, vtkImageData* icon, const char* string, double color[3])
{
  if (i >= 0 && i < this->NumberOfEntries)
  {
    this->SetEntry(i, symbol, string, color);
    this->SetEntryIcon(i, icon);
  }
}

//------------------------------------------------------------------------------
void vtkLegendBoxActor::SetEntrySymbol(int i, vtkPolyData* symbol)
{
  if (i >= 0 && i < this->NumberOfEntries)
  {
    if (this->Symbol[i] == symbol)
    {
      return;
    }
    if (this->Symbol[i])
    {
      this->Symbol[i]->Delete();
    }
    this->Symbol[i] = symbol;
    if (this->Symbol[i])
    {
      this->Symbol[i]->Register(this);
    }
    this->Modified();
  }
}

//------------------------------------------------------------------------------
void vtkLegendBoxActor::SetEntryIcon(int i, vtkImageData* icon)
{
  if (i >= 0 && i < this->NumberOfEntries)
  {
    if (this->IconImage[i] == icon)
    {
      return;
    }
    if (this->IconImage[i])
    {
      this->IconImage[i]->Delete();
    }
    this->IconImage[i] = icon;
    if (this->IconImage[i])
    {
      this->IconImage[i]->Register(this);
    }
    this->Modified();
  }
}

//------------------------------------------------------------------------------
void vtkLegendBoxActor::SetEntryString(int i, const char* string)
{
  if (i >= 0 && i < this->NumberOfEntries)
  {
    if (this->TextMapper[i]->GetInput() && string &&
      (!strcmp(this->TextMapper[i]->GetInput(), string)))
    {
      return;
    }
    this->TextMapper[i]->SetInput(string);
    this->Modified();
  }
}

//------------------------------------------------------------------------------
void vtkLegendBoxActor::SetEntryColor(int i, double color[3])
{
  if (i >= 0 && i < this->NumberOfEntries)
  {
    double oldColor[3];
    this->Colors->GetTuple(i, oldColor);

    if (oldColor[0] != color[0] || oldColor[1] != color[1] || oldColor[2] != color[2])
    {
      this->Colors->SetTuple3(i, color[0], color[1], color[2]);
      this->Modified();
    }
  }
}

//------------------------------------------------------------------------------
void vtkLegendBoxActor::SetEntryColor(int i, double r, double g, double b)
{
  double rgb[3];
  rgb[0] = r;
  rgb[1] = g;
  rgb[2] = b;
  this->SetEntryColor(i, rgb);
}

//------------------------------------------------------------------------------
vtkPolyData* vtkLegendBoxActor::GetEntrySymbol(int i)
{
  if (i < 0 || i >= this->NumberOfEntries)
  {
    return nullptr;
  }
  else
  {
    return this->Symbol[i];
  }
}

//------------------------------------------------------------------------------
vtkImageData* vtkLegendBoxActor::GetEntryIcon(int i)
{
  if (i < 0 || i >= this->NumberOfEntries)
  {
    return nullptr;
  }
  else
  {
    return this->IconImage[i];
  }
}

//------------------------------------------------------------------------------
const char* vtkLegendBoxActor::GetEntryString(int i)
{
  if (i < 0 || i >= this->NumberOfEntries)
  {
    return nullptr;
  }
  else
  {
    return this->TextMapper[i]->GetInput();
  }
}

//------------------------------------------------------------------------------
double* vtkLegendBoxActor::GetEntryColor(int i)
{
  if (i < 0 || i >= this->NumberOfEntries)
  {
    return nullptr;
  }
  else
  {
    return vtkArrayDownCast<vtkDoubleArray>(this->Colors)->GetPointer(i * 3);
  }
}

//------------------------------------------------------------------------------
// Release any graphics resources that are being consumed by this actor.
// The parameter window could be used to determine which graphic
// resources to release.
void vtkLegendBoxActor::ReleaseGraphicsResources(vtkWindow* win)
{
  if (this->BackgroundActor)
  {
    this->BackgroundActor->ReleaseGraphicsResources(win);
  }

  if (this->BorderActor)
  {
    this->BorderActor->ReleaseGraphicsResources(win);
  }

  if (this->BoxActor)
  {
    this->BoxActor->ReleaseGraphicsResources(win);
  }

  for (int i = 0; i < this->Size; i++)
  {
    this->TextActor[i]->ReleaseGraphicsResources(win);
    this->SymbolActor[i]->ReleaseGraphicsResources(win);
    this->IconActor[i]->ReleaseGraphicsResources(win);
  }
}

//------------------------------------------------------------------------------
int vtkLegendBoxActor::RenderOverlay(vtkViewport* viewport)
{
  if (this->NumberOfEntries <= 0)
  {
    return 0;
  }

  int renderedSomething = 0;
  if (this->BackgroundActor && this->UseBackground)
  {
    this->BackgroundActor->RenderOverlay(viewport);
  }

  if (this->Border)
  {
    renderedSomething += this->BorderActor->RenderOverlay(viewport);
  }

  if (this->Box)
  {
    renderedSomething += this->BoxActor->RenderOverlay(viewport);
  }

  if (this->LegendEntriesVisible)
  {
    for (int i = 0; i < this->NumberOfEntries; i++)
    {
      if (this->Symbol[i])
      {
        renderedSomething += this->SymbolActor[i]->RenderOverlay(viewport);
      }
      if (this->IconImage[i])
      {
        renderedSomething += this->IconActor[i]->RenderOverlay(viewport);
      }

      renderedSomething += this->TextActor[i]->RenderOverlay(viewport);
    }
  }

  return renderedSomething;
}

//------------------------------------------------------------------------------
int vtkLegendBoxActor::RenderOpaqueGeometry(vtkViewport* viewport)
{
  int i;
  double symbolSize;

  if (this->NumberOfEntries <= 0)
  {
    return 0;
  }

  if (!this->EntryTextProperty)
  {
    vtkErrorMacro(<< "Need entry text property to render legend box actor");
    return 0;
  }

  // Check to see whether we have to rebuild everything
  const int* vsize = viewport->GetSize();
  if (this->GetMTime() > this->BuildTime || this->EntryTextProperty->GetMTime() > this->BuildTime ||
    vsize[0] != this->CachedSize[0] || vsize[1] != this->CachedSize[1])
  {
    vtkDebugMacro(<< "Rebuilding text");
    this->CachedSize[0] = vsize[0];
    this->CachedSize[1] = vsize[1];

    // If text prop has changed, recopy it to all mappers
    // We have to use shallow copy since the color of each text prop
    // can be overridden

    if (this->EntryTextProperty->GetMTime() > this->BuildTime)
    {
      for (i = 0; i < this->NumberOfEntries; i++)
      {
        this->TextMapper[i]->GetTextProperty()->ShallowCopy(this->EntryTextProperty);
      }
    }

    // Get position information
    int *x1, *x2;
    double p1[3], p2[3];
    x1 = this->PositionCoordinate->GetComputedViewportValue(viewport);
    x2 = this->Position2Coordinate->GetComputedViewportValue(viewport);
    p1[0] = (double)x1[0];
    p1[1] = (double)x1[1];
    p1[2] = 0.0;
    p2[0] = (double)x2[0];
    p2[1] = (double)x2[1];
    p2[2] = 0.0;

    // Compute spacing...trying to keep things proportional
    //
    // Find the longest string and symbol width ratio
    int length, maxLength;
    int maxTextMapper = 0;
    int tempi[2], fontSize;
    double sf, twr, swr;
    const double* bounds;
    bool iconExists(false);
    bool symbolExists(false);

    for (swr = 0.0, maxLength = i = 0; i < this->NumberOfEntries; i++)
    {
      this->TextMapper[i]->GetTextProperty()->SetFontSize(12);
      length = this->TextMapper[i]->GetWidth(viewport);
      if (length > maxLength)
      {
        maxLength = length;
        maxTextMapper = i;
      }

      if (this->Symbol[i]) // if there is a symbol
      {
        symbolExists = true;
        // this->Symbol[i]->Update();
        bounds = this->Symbol[i]->GetBounds();
        if ((bounds[3] - bounds[2]) == 0.0)
        {
          sf = 1.0;
        }
        else
        {
          sf = (bounds[1] - bounds[0]) / (bounds[3] - bounds[2]);
        }
        if (sf > swr)
        {
          swr = sf;
        }
      } // if symbol defined

      // We pick the one with highest ratio if both symbol and icon
      // exists.
      if (this->IconImage[i])
      {
        iconExists = true;

        bounds = this->IconImage[i]->GetBounds();
        if ((bounds[3] - bounds[2]) == 0.0)
        {
          sf = 1.0;
        }
        else
        {
          sf = (bounds[1] - bounds[0]) / (bounds[3] - bounds[2]);
        }
        if (sf > swr)
        {
          swr = sf;
        }
      } // if icon defined.
    }

    // Compute the final proportion (symbol width to text width)
    fontSize = 12;
    this->TextMapper[maxTextMapper]->GetTextProperty()->SetFontSize(fontSize);
    this->TextMapper[maxTextMapper]->GetSize(viewport, tempi);

    if (maxLength > 0) // make sure that tempi is not 0, to avoid a
                       // divide-by-zero floating-point exception.
    {
      twr = (double)tempi[0] / tempi[1];
      symbolSize = swr / (swr + twr);
    }
    else
    {
      symbolSize = 0;
    }

    if (iconExists && symbolExists)
    {
      symbolSize *= 2;
    }

    // Okay, now that the proportions are okay, let's size everything
    // First the text
    int size[2];
    size[0] = (int)((1.0 - symbolSize) * (p2[0] - p1[0] - 2.0 * this->Padding));
    size[1] = (int)((p2[1] - p1[1] - 2.0 * this->Padding) / this->NumberOfEntries);

    fontSize = this->TextMapper[maxTextMapper]->SetConstrainedFontSize(viewport, size[0], size[1]);
    this->TextMapper[maxTextMapper]->GetSize(viewport, tempi);

    // don't draw anything if it's too small
    if (size[1] > 0 && fontSize > 0)
    {
      this->LegendEntriesVisible = 1;
    }
    else
    {
      this->LegendEntriesVisible = 0;
    }

    // Border and box - may adjust spacing based on font size relationship
    // to the proportions relative to the border
    //
    if (this->Border || this->Box)
    {
      // adjust the border/box placement if too much whitespace
      if (!this->LockBorder && tempi[0] < size[0])
      {
        p2[0] =
          p1[0] + 2. * this->Padding + symbolSize * (p2[0] - p1[0] - 2. * this->Padding) + tempi[0];
      }
      vtkPoints* pts = this->BorderPolyData->GetPoints();
      pts->SetPoint(0, p1);
      pts->SetPoint(1, p2[0], p1[1], 0.);
      pts->SetPoint(2, p2[0], p2[1], 0.);
      pts->SetPoint(3, p1[0], p2[1], 0.);
      pts->Modified();
    }

    if (this->UseBackground)
    {
      this->Background->SetOrigin(p1[0], p1[1], 0.);
      this->Background->SetPoint1(p2[0], p1[1], 0.);
      this->Background->SetPoint2(p1[0], p2[1], 0.);

      this->BackgroundMapper->SetInputConnection(this->Background->GetOutputPort());
      this->BackgroundActor->GetProperty()->SetOpacity(this->BackgroundOpacity);
      this->BackgroundActor->GetProperty()->SetColor(this->BackgroundColor);
    }

    if (this->Border)
    {
      this->BorderActor->SetProperty(this->GetProperty());
    }

    // Place text strings
    double color[3];
    double posY;
    double posX = p1[0] + this->Padding + symbolSize * (p2[0] - p1[0] - 2.0 * this->Padding);
    for (i = 0; i < this->NumberOfEntries; i++)
    {
      posY = p2[1] - this->Padding - (double)i * size[1] - 0.5 * size[1];
      this->TextActor[i]->SetPosition(posX, posY);
      this->TextMapper[i]->GetTextProperty()->SetFontSize(fontSize);
      this->TextMapper[i]->GetTextProperty()->SetVerticalJustification(VTK_TEXT_CENTERED);
      this->TextMapper[i]->GetTextProperty()->SetJustification(VTK_TEXT_LEFT);
      this->Colors->GetTuple(i, color);
      if (color[0] >= 0.0 && color[1] >= 0.0 && color[2] >= 0.0)
      {
        this->TextMapper[i]->GetTextProperty()->SetColor(color[0], color[1], color[2]);
      }
    }

    double sizeFraction = 1.0;

    double symbolsPositionFraction = 0.5;
    double iconsPositionFraction = 0.0;

    if (symbolExists && iconExists)
    {
      symbolsPositionFraction = 0.25;
      iconsPositionFraction = 0.625;

      sizeFraction = 0.5;
    }
    else if (iconExists)
    {
      iconsPositionFraction = 0.5;
    }
    else
    {
      // Do nothing.
    }

    // Place symbols
    //
    // Find the x-y bounds of the symbols...we'll be scaling these as well
    size[0] = (int)(sizeFraction * symbolSize * (p2[0] - p1[0] - 2.0 * this->Padding));
    posX = p1[0] + this->Padding +
      symbolsPositionFraction * symbolSize * (p2[0] - p1[0] - 2.0 * this->Padding);
    for (i = 0; i < this->NumberOfEntries; i++)
    {
      if (this->Symbol[i])
      {
        this->SymbolTransform[i]->SetInputData(this->Symbol[i]);
        bounds = this->Symbol[i]->GetBounds();

        if ((bounds[1] - bounds[0]) == 0.0)
        {
          sf = VTK_DOUBLE_MAX;
        }
        else
        {
          sf = size[0] / (bounds[1] - bounds[0]);
        }

        if ((bounds[3] - bounds[2]) == 0.0)
        {
          if (sf >= VTK_DOUBLE_MAX)
          {
            sf = 1.0;
          }
        }
        else if ((size[1] / (bounds[3] - bounds[2])) < sf)
        {
          sf = size[1] / (bounds[3] - bounds[2]);
        }

        posY = p2[1] - this->Padding - (double)i * size[1] - 0.5 * size[1] - 0.25 * tempi[1];
        this->Transform[i]->Identity();
        this->Transform[i]->Translate(posX, posY, 0.0);
        this->Transform[i]->Scale(0.5 * sf, 0.5 * sf, 0);
        this->SymbolMapper[i]->SetScalarVisibility(this->ScalarVisibility);
        this->SymbolActor[i]->GetProperty()->DeepCopy(this->GetProperty());
        this->Colors->GetTuple(i, color);
        if (color[0] >= 0.0 && color[1] >= 0.0 && color[2] >= 0.0)
        {
          this->SymbolActor[i]->GetProperty()->SetColor(color[0], color[1], color[2]);
        }
      } // if symbol defined
      else
      {
        std::cout << "Symbol is not defined: " << std::endl;
      }
    }

    // Place icons.
    size[0] = (int)(sizeFraction * symbolSize * (p2[0] - p1[0] - 2.0 * this->Padding));
    posX = p1[0] + this->Padding +
      iconsPositionFraction * symbolSize * (p2[0] - p1[0] - 2.0 * this->Padding);
    for (i = 0; i < this->NumberOfEntries; i++)
    {
      if (this->IconImage[i])
      {
        vtkTexture* texture(vtkTexture::New());
        texture->SetInputData(this->IconImage[i]);
        this->IconActor[i]->SetTexture(texture);
        texture->Delete();
        this->Icon[i]->Update();
        this->IconTransformFilter[i]->SetInputConnection(this->Icon[i]->GetOutputPort());
        this->IconTransformFilter[i]->Update();
        bounds = this->Icon[i]->GetOutput(0)->GetBounds();

        if ((bounds[1] - bounds[0]) == 0.0)
        {
          sf = VTK_DOUBLE_MAX;
        }
        else
        {
          sf = size[0] / (bounds[1] - bounds[0]);
        }

        if ((bounds[3] - bounds[2]) == 0.0)
        {
          if (sf >= VTK_DOUBLE_MAX)
          {
            sf = 1.0;
          }
        }
        else if ((size[1] / (bounds[3] - bounds[2])) < sf)
        {
          sf = size[1] / (bounds[3] - bounds[2]);
        }

        posY = p2[1] - this->Padding - (double)i * size[1] - 0.5 * size[1] - 0.25 * tempi[1];
        this->IconTransform[i]->Identity();
        this->IconTransform[i]->Translate(posX, posY, 0.0);
        this->IconTransform[i]->Scale(0.5 * sf, 0.5 * sf, 1);
        this->IconMapper[i]->SetScalarVisibility(this->ScalarVisibility);
      } // If icon is defined.
    }
    this->BuildTime.Modified();
  } // rebuild legend box

  // Okay, now we're ready to render something
  // Border
  int renderedSomething = 0;
  if (this->BackgroundActor && this->UseBackground)
  {
    this->BackgroundActor->RenderOpaqueGeometry(viewport);
  }

  if (this->Border)
  {
    renderedSomething += this->BorderActor->RenderOpaqueGeometry(viewport);
  }

  if (this->Box)
  {
    renderedSomething += this->BoxActor->RenderOpaqueGeometry(viewport);
  }

  if (this->LegendEntriesVisible)
  {
    for (i = 0; i < this->NumberOfEntries; i++)
    {
      if (this->Symbol[i])
      {
        renderedSomething += this->SymbolActor[i]->RenderOpaqueGeometry(viewport);
      }
      if (this->IconImage[i])
      {
        renderedSomething += this->IconActor[i]->RenderOpaqueGeometry(viewport);
      }
      renderedSomething += this->TextActor[i]->RenderOpaqueGeometry(viewport);
    }
  }

  return renderedSomething;
}

//------------------------------------------------------------------------------
// Description:
// Does this prop have some translucent polygonal geometry?
vtkTypeBool vtkLegendBoxActor::HasTranslucentPolygonalGeometry()
{
  return 0;
}

//------------------------------------------------------------------------------
void vtkLegendBoxActor::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);

  if (this->EntryTextProperty)
  {
    os << indent << "Entry Text Property:\n";
    this->EntryTextProperty->PrintSelf(os, indent.GetNextIndent());
  }
  else
  {
    os << indent << "Entry Text Property: (none)\n";
  }

  os << indent << "Number Of Entries: " << this->NumberOfEntries << "\n";

  os << indent << "Scalar Visibility: " << (this->ScalarVisibility ? "On\n" : "Off\n");
  os << indent << "Padding: " << this->Padding << "\n";
  os << indent << "Border: " << (this->Border ? "On\n" : "Off\n");
  os << indent << "Box: " << (this->Box ? "On\n" : "Off\n");
  os << indent << "LockBorder: " << (this->LockBorder ? "On\n" : "Off\n");

  os << indent << "UseBackgroud: " << (this->UseBackground ? "On\n" : "Off\n");
  os << indent << "BackgroundOpacity: " << this->BackgroundOpacity << "\n";

  os << indent << "BackgroundColor: (" << this->BackgroundColor[0] << ", "
     << this->BackgroundColor[1] << ", " << this->BackgroundColor[2] << ")\n";
}

//------------------------------------------------------------------------------
void vtkLegendBoxActor::ShallowCopy(vtkProp* prop)
{
  vtkLegendBoxActor* a = vtkLegendBoxActor::SafeDownCast(prop);
  if (a != nullptr)
  {
    this->SetPosition2(a->GetPosition2());
    this->SetEntryTextProperty(a->GetEntryTextProperty());
    this->SetBorder(a->GetBorder());
    this->SetLockBorder(a->GetLockBorder());
    this->SetPadding(a->GetPadding());
    this->SetScalarVisibility(a->GetScalarVisibility());
    this->SetNumberOfEntries(a->GetNumberOfEntries());
    for (int i = 0; i < this->NumberOfEntries; i++)
    {
      this->SetEntrySymbol(i, a->GetEntrySymbol(i));
      this->SetEntryString(i, a->GetEntryString(i));
      this->SetEntryColor(i, a->GetEntryColor(i));
    }
  }

  // Now do superclass
  this->vtkActor2D::ShallowCopy(prop);
}
