TreeMapView

VTKExamples/Cxx/InfoVis/TreeMapView

Description

Fix: use a much simpler tree and generate the tree in the code instead of reading files.

Code

TreeMapView.cxx

#include <vtkDataRepresentation.h>
#include <vtkRenderWindow.h>
#include <vtkRegressionTestImage.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkTestUtilities.h>
#include <vtkTreeMapView.h>
#include <vtkViewTheme.h>
#include <vtkXMLTreeReader.h>
#include <vtkSmartPointer.h>
#include <vtkTesting.h>

int main(int argc, char* argv[])
{
  vtkSmartPointer<vtkTesting> testHelper =
    vtkSmartPointer<vtkTesting>::New();
  testHelper->AddArguments(argc,const_cast<const char **>(argv));
  std::string dataRoot = testHelper->GetDataRoot();
  std::string treeFileName = dataRoot + "/Data/Infovis/XML/vtkclasses.xml";
  std::string graphFileName = dataRoot + "/Data/Infovis/XML/vtklibrary.xml";

  if (argc > 2)
  {
    treeFileName = argv[1];  // vtkclasses.xml
    graphFileName = argv[2]; // vtklibrary.xml
  }

  // We need to put the graph and tree edges in different domains.
  vtkSmartPointer<vtkXMLTreeReader> reader1 =
    vtkSmartPointer<vtkXMLTreeReader>::New();
  reader1->SetFileName(treeFileName.c_str());
  reader1->SetEdgePedigreeIdArrayName("tree edge");
  reader1->GenerateVertexPedigreeIdsOff();
  reader1->SetVertexPedigreeIdArrayName("id");

  vtkSmartPointer<vtkXMLTreeReader> reader2 =
    vtkSmartPointer<vtkXMLTreeReader>::New();
  reader2->SetFileName(graphFileName.c_str());
  reader2->SetEdgePedigreeIdArrayName("graph edge");
  reader2->GenerateVertexPedigreeIdsOff();
  reader2->SetVertexPedigreeIdArrayName("id");

  reader1->Update();
  reader2->Update();

  vtkSmartPointer<vtkTreeMapView> view =
    vtkSmartPointer<vtkTreeMapView>::New();
  view->DisplayHoverTextOff();
  view->SetTreeFromInputConnection(reader2->GetOutputPort());
  view->SetGraphFromInputConnection(reader1->GetOutputPort());

  view->SetAreaColorArrayName("level");
  view->SetEdgeColorToSplineFraction();
  view->SetColorEdges(true);
  view->SetAreaLabelArrayName("id");
  view->SetAreaHoverArrayName("id");
  view->SetAreaLabelVisibility(true);
  view->SetAreaSizeArrayName("VertexDegree");

  // Apply a theme to the views
  vtkViewTheme* const theme = vtkViewTheme::CreateMellowTheme();
  view->ApplyViewTheme(theme);
  theme->Delete();

  view->GetRenderWindow()->SetMultiSamples(0);
  view->GetRenderWindow()->SetAlphaBitPlanes(1);
  view->Update();
  view->ResetCamera();

  view->GetInteractor()->Initialize();
  view->GetInteractor()->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(TreeMapView)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkIOInfovis
  vtkInteractionStyle
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingOpenGL2
  vtkTestingCore
  vtkTestingRendering
  vtkViewsCore
  vtkViewsInfovis QUIET)
if (NOT VTK_FOUND)
  message("Skipping TreeMapView: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(TreeMapView MACOSX_BUNDLE TreeMapView.cxx )
  target_link_libraries(TreeMapView PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(TreeMapView MACOSX_BUNDLE TreeMapView.cxx )
  target_link_libraries(TreeMapView PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS TreeMapView
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build TreeMapView

Click here to download TreeMapView and its CMakeLists.txt file. Once the tarball TreeMapView.tar has been downloaded and extracted,

cd TreeMapView/build

If VTK is installed:

cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

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

Build the project:

make

and run it:

./TreeMapView

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.