WordCloudDemo

#include <vtkNew.h>
#include <vtkSmartPointer.h>
#include <vtkWordCloud.h>

#include <vtkCamera.h>
#include <vtkImageViewer2.h>
#include <vtkNamedColors.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>

#include <vtksys/CommandLineArguments.hxx>

namespace {
// Cloud Parameters.
class CloudParameters
{
public:
  CloudParameters()
    : BackgroundColorName("MidnightBlue"),
      BWMask(false),
      ColorSchemeName(""),
      DPI(200),
      FileName(""),
      FontFileName(""),
      FontMultiplier(6),
      Gap(2),
      MaskColorName("black"),
      MaskFileName(""),
      MaxFontSize(48),
      MinFontSize(12),
      MinFrequency(1),
      StopListFileName(""),
      Title(""),
      WordColorName(""){};
  void Print(ostream& os)
  {
    os << "Cloud Parameters" << std::endl;
    os << "  BackgroundColorName: " << BackgroundColorName << std::endl;
    os << "  BWMask: " << (BWMask ? "true" : "false") << std::endl;
    os << "  ColorDistribution: " << ColorDistribution[0] << " "
       << ColorDistribution[1] << std::endl;
    os << "  ColorSchemeName: " << ColorSchemeName << std::endl;
    os << "  DPI: " << DPI << std::endl;
    os << "  FontFileName: " << FontFileName << std::endl;
    os << "  FontMultiplier: " << FontMultiplier << std::endl;
    os << "  Gap: " << Gap << std::endl;
    os << "  MaskColorName: " << MaskColorName << std::endl;
    os << "  MaskFileName: " << MaskFileName << std::endl;
    os << "  MinFontSize: " << MinFontSize << std::endl;
    os << "  MaxFontSize: " << MaxFontSize << std::endl;
    os << "  MinFrequency: " << MinFrequency << std::endl;
    os << "  OffsetDistribution: " << OffsetDistribution[0] << " "
       << OffsetDistribution[1] << std::endl;
    os << "  OrientationDistribution: " << OrientationDistribution[0] << " "
       << OrientationDistribution[1] << std::endl;
    os << "  Orientations: ";
    for (auto o : Orientations)
    {
      os << o << " ";
    }
    os << std::endl;
    os << "  ReplacementPairs: ";
    for (auto p = 0; p < ReplacementPairs.size(); p += 2)
    {
      os << ReplacementPairs[p] << "->" << ReplacementPairs[p + 1] << " ";
    }
    os << std::endl;
    os << "  Sizes: " << Sizes[0] << " " << Sizes[1] << std::endl;
    os << "  StopWords: ";
    for (auto const& s : StopWords)
    {
      os << s << " ";
    }
    os << std::endl;
    os << "  Title: " << Title << std::endl;
    os << "  WordColorName: " << WordColorName << std::endl;
  }
  std::string BackgroundColorName;
  bool BWMask;
  std::string ColorSchemeName;
  std::vector<double> ColorDistribution;
  int DPI;
  std::string FileName;
  std::string FontFileName;
  int FontMultiplier;
  int Gap;
  std::string MaskColorName;
  std::string MaskFileName;
  int MaxFontSize;
  int MinFontSize;
  int MinFrequency;
  std::vector<int> OffsetDistribution;
  std::vector<double> OrientationDistribution;
  std::vector<double> Orientations;
  std::vector<std::string> ReplacementPairs;
  std::vector<int> Sizes;
  std::vector<std::string> StopWords;
  std::string StopListFileName;
  std::string Title;
  std::string WordColorName;
};

bool ProcessCommandLine(vtksys::CommandLineArguments& arg,
                        CloudParameters& cloudParameters);

void CloudParametersToWordCloud(CloudParameters& cloudParameters,
                                vtkSmartPointer<vtkWordCloud>& wordCloud);
} // namespace

int main(int argc, char* argv[])
{
  // Process command line argumemts.
  CloudParameters cloudParameters;
  vtksys::CommandLineArguments arg;
  arg.Initialize(argc, argv);
  if (!ProcessCommandLine(arg, cloudParameters))
  {
    return EXIT_FAILURE;
  }

  // Transfer parameters to word cloud member data.
  auto wordCloud = vtkSmartPointer<vtkWordCloud>::New();
  CloudParametersToWordCloud(cloudParameters, wordCloud);

  // Get the file that contains the text to be converted to a word cloud.
  char** newArgv = nullptr;
  int newArgc = 0;
  arg.GetUnusedArguments(&newArgc, &newArgv);
  if (newArgc < 2)
  {
    std::cout << "Usage: " << argv[0] << " textFileName " << arg.GetHelp()
              << std::endl;
    return EXIT_FAILURE;
  }

  wordCloud->SetFileName(newArgv[1]);
  wordCloud->Update();
  wordCloud->Print(std::cout);
  std::cout << "Kept Words: " << wordCloud->GetKeptWords().size() << std::endl;
  std::cout << "Stopped Words: " << wordCloud->GetStoppedWords().size()
            << std::endl;
  std::cout << "Skipped Words: " << wordCloud->GetSkippedWords().size()
            << std::endl;

  // Display the final image.
  vtkNew<vtkNamedColors> colors;
  vtkNew<vtkRenderWindowInteractor> interactor;

  vtkNew<vtkImageViewer2> imageViewer;
  imageViewer->SetInputData(wordCloud->GetOutput());
  imageViewer->SetupInteractor(interactor);
  imageViewer->GetRenderer()->SetBackground(
      colors->GetColor3d(wordCloud->GetBackgroundColorName()).GetData());
  imageViewer->SetSize(wordCloud->GetSizes()[0], wordCloud->GetSizes()[1]);
  imageViewer->GetRenderer()->ResetCamera();

  // Zoom in a bit
  vtkCamera* camera = imageViewer->GetRenderer()->GetActiveCamera();
  camera->ParallelProjectionOn();
  camera->SetParallelScale(wordCloud->GetAdjustedSizes()[0] * .4);

  imageViewer->GetRenderWindow()->SetWindowName("WordCloudDemo");
  imageViewer->GetRenderWindow()->Render();
  interactor->Start();

  return EXIT_SUCCESS;
}

namespace {
bool ProcessCommandLine(vtksys::CommandLineArguments& arg,
                        CloudParameters& cloudParameters)
{
  typedef vtksys::CommandLineArguments argT;

  // Need this to get arguments without --'s.
  arg.StoreUnusedArguments(true);

  arg.AddArgument("--backgroundColorName", argT::SPACE_ARGUMENT,
                  &cloudParameters.BackgroundColorName,
                  "Name of the color for the background(MignightBlue)");
  arg.AddArgument(
      "--colorDistribution", argT::MULTI_ARGUMENT,
      &cloudParameters.ColorDistribution,
      "Distribution of random colors(.6 1.0). If wordColorName is not empty, "
      "random colors are generated with this distribution");
  arg.AddArgument("--colorSchemeName", argT::SPACE_ARGUMENT,
                  &cloudParameters.ColorSchemeName, "Color scheme name()");
  arg.AddArgument("--dpi", argT::SPACE_ARGUMENT, &cloudParameters.DPI,
                  "Dots per inch(200)");
  arg.AddArgument("--fontFileName", argT::SPACE_ARGUMENT,
                  &cloudParameters.FontFileName,
                  "Font file name(\"\"). If fontFileName is empty, the "
                  "built-in Arial font is used.");
  arg.AddArgument("--fontMultiplier", argT::SPACE_ARGUMENT,
                  &cloudParameters.FontMultiplier,
                  "Font multiplier(6). This final FontSize is this value * the "
                  "word frequency.");
  arg.AddArgument("--gap", argT::SPACE_ARGUMENT, &cloudParameters.Gap,
                  "Space gap of words (2). The gap is the number of spaces "
                  "added to the beginning and end of each word");
  arg.AddArgument(
      "--maskColorName", argT::SPACE_ARGUMENT, &cloudParameters.MaskColorName,
      "Name of the color for the mask (black). This is the name of the color "
      "that defines the foreground of the mask. Usually black or white");
  arg.AddArgument(
      "--maskFileName", argT::SPACE_ARGUMENT, &cloudParameters.MaskFileName,
      "Mask file name(\"\"). If the mask file is specified, if will be used as "
      "the mask, otherwise a black square is used as the mask.");
  arg.AddArgument("--minFontSize", argT::SPACE_ARGUMENT,
                  &cloudParameters.MinFontSize, "Minimum font size(8)");
  arg.AddArgument("--minFrequency", argT::SPACE_ARGUMENT,
                  &cloudParameters.MinFrequency,
                  "Minimum word frequency accepted(2)");
  arg.AddArgument("--maxFontSize", argT::SPACE_ARGUMENT,
                  &cloudParameters.MaxFontSize, "Maximum font size(48)");
  arg.AddArgument(
      "--offsetDistribution", argT::MULTI_ARGUMENT,
      &cloudParameters.OffsetDistribution,
      "Range of random offsets(-size[0]/100.0 -size{1]/100.0)(-20 20).");
  arg.AddArgument("--orientationDistribution", argT::MULTI_ARGUMENT,
                  &cloudParameters.OrientationDistribution,
                  "Ranges of random orientations(-20 20)");
  arg.AddArgument("--orientations", argT::MULTI_ARGUMENT,
                  &cloudParameters.Orientations,
                  "List of discrete orientations (). If non-empty, these will "
                  "be used instead of the orientations distribution");
  arg.AddArgument(
      "--stopListFileName", argT::SPACE_ARGUMENT,
      &cloudParameters.StopListFileName,
      "User provided stop list file. Replaces built-in stop list().");
  arg.AddArgument("--stopWords", argT::MULTI_ARGUMENT,
                  &cloudParameters.StopWords,
                  "User provided stop words(). These will ba added to the "
                  "built-in stop list.");
  arg.AddArgument("--bwMask", argT::NO_ARGUMENT, &cloudParameters.BWMask,
                  "Mask image has a single channel(false). Mask images "
                  "normally have three channels (r,g,b).");
  arg.AddArgument("--size", argT::MULTI_ARGUMENT, &cloudParameters.Sizes,
                  "Size of image(640 480)");
  arg.AddArgument("--wordColorName", argT::SPACE_ARGUMENT,
                  &cloudParameters.WordColorName,
                  "Name of the color for the words(). If the name is empty, "
                  "the colorDistribution will generate random colors.");
  arg.AddArgument("--replacementPairs", argT::MULTI_ARGUMENT,
                  &cloudParameters.ReplacementPairs,
                  "Replace word with another word ().");
  arg.AddArgument("--title", argT::SPACE_ARGUMENT, &cloudParameters.Title,
                  "Use this word and set a high frequency().");
  bool help = false;
  arg.AddArgument("--help", argT::NO_ARGUMENT, &help, "Show help(false)");
  arg.Parse();
  if (help)
  {
    std::cout << "Usage: "
              << "WordCloud"
              << " textFileName " << arg.GetHelp() << std::endl;
    return false;
  }

  // Set defaults for vector arguments.
  if (cloudParameters.ColorDistribution.size() == 0)
  {
    cloudParameters.ColorDistribution.push_back(.6);
    cloudParameters.ColorDistribution.push_back(1.0);
  }

  if (cloudParameters.OrientationDistribution.size() == 0)
  {
    cloudParameters.OrientationDistribution.push_back(-20);
    cloudParameters.OrientationDistribution.push_back(20);
  }
  if (cloudParameters.Sizes.size() == 0)
  {
    cloudParameters.Sizes.push_back(640);
    cloudParameters.Sizes.push_back(480);
  }
  if (cloudParameters.OffsetDistribution.size() == 0)
  {
    cloudParameters.OffsetDistribution.push_back(-cloudParameters.Sizes[0] /
                                                 100.0);
    cloudParameters.OffsetDistribution.push_back(cloudParameters.Sizes[1] /
                                                 100.0);
  }
  return true;
}
void CloudParametersToWordCloud(CloudParameters& cloudParameters,
                                vtkSmartPointer<vtkWordCloud>& wordCloud)
{
  wordCloud->SetBackgroundColorName(cloudParameters.BackgroundColorName);
  wordCloud->SetBWMask(cloudParameters.BWMask);
  wordCloud->SetColorSchemeName(cloudParameters.ColorSchemeName);
  wordCloud->SetFontFileName(cloudParameters.FontFileName);

  std::array<double, 2> colorDistribution;
  colorDistribution[0] = cloudParameters.ColorDistribution[0];
  colorDistribution[1] = cloudParameters.ColorDistribution[1];
  wordCloud->SetColorDistribution(colorDistribution);
  wordCloud->SetDPI(cloudParameters.DPI);
  wordCloud->SetFileName(cloudParameters.FileName);
  wordCloud->SetFontFileName(cloudParameters.FontFileName);
  wordCloud->SetFontMultiplier(cloudParameters.FontMultiplier);
  wordCloud->SetGap(cloudParameters.Gap);
  wordCloud->SetMaskColorName(cloudParameters.MaskColorName);
  wordCloud->SetMaskFileName(cloudParameters.MaskFileName);
  wordCloud->SetMaxFontSize(cloudParameters.MaxFontSize);
  wordCloud->SetMinFontSize(cloudParameters.MinFontSize);
  wordCloud->SetMinFrequency(cloudParameters.MinFrequency);

  std::array<int, 2> offsetDistribution;
  offsetDistribution[0] = cloudParameters.OffsetDistribution[0];
  offsetDistribution[1] = cloudParameters.OffsetDistribution[1];
  wordCloud->SetOffsetDistribution(offsetDistribution);

  std::array<double, 2> orientationDistribution;
  orientationDistribution[0] = cloudParameters.OrientationDistribution[0];
  orientationDistribution[1] = cloudParameters.OrientationDistribution[1];
  wordCloud->SetOrientationDistribution(orientationDistribution);
  wordCloud->SetOrientations(cloudParameters.Orientations);

  std::vector<std::tuple<std::string, std::string>> replacementPairs;
  std::tuple<std::string, std::string> replacementPair;
  for (auto p = 0; p < cloudParameters.ReplacementPairs.size(); p += 2)
  {
    std::string from = cloudParameters.ReplacementPairs[p];
    std::string to = cloudParameters.ReplacementPairs[p + 1];
    replacementPair = std::make_tuple(from, to);
    replacementPairs.push_back(replacementPair);
  }
  wordCloud->SetReplacementPairs(replacementPairs);

  std::array<int, 2> sizes;
  sizes[0] = cloudParameters.Sizes[0];
  sizes[1] = cloudParameters.Sizes[1];
  wordCloud->SetSizes(sizes);

  std::set<std::string> stopWords;
  for (auto const& s : cloudParameters.StopWords)
  {
    stopWords.insert(s);
  }
  wordCloud->SetStopWords(stopWords);
  wordCloud->SetStopListFileName(cloudParameters.StopListFileName);
  wordCloud->SetWordColorName(cloudParameters.WordColorName);
  std::string title(cloudParameters.Title);
  wordCloud->SetTitle(title);
}
} // namespace

cmake_minimum_required(VERSION 3.12 FATAL_ERROR)

project(WordCloudDemo)

find_package(VTK COMPONENTS 
)

if (NOT VTK_FOUND)
  message(FATAL_ERROR "WordCloudDemo: Unable to find the VTK build folder.")
endif()

# Prevent a "command line is too long" failure in Windows.
set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
add_executable(WordCloudDemo MACOSX_BUNDLE WordCloudDemo.cxx )
  target_link_libraries(WordCloudDemo PRIVATE ${VTK_LIBRARIES}
)
# vtk_module_autoinit is needed
vtk_module_autoinit(
  TARGETS WordCloudDemo
  MODULES ${VTK_LIBRARIES}
)

cd WordCloudDemo/build

cmake ..

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

make

./WordCloudDemo