Method slotOpenXMLFile

Examples/Infovis/Cxx/CustomLinkView/CustomLinkView.cxx:122–191

Action to be taken upon graph file open

// Action to be taken upon graph file open
void CustomLinkView::slotOpenXMLFile()
{
  // Browse for and open the file
  QDir dir;

  // Open the text data file
  QString fileName = QFileDialog::getOpenFileName(
    this, "Select the text data file", QDir::homePath(), "XML Files (*.xml);;All Files (*.*)");

  if (fileName.isNull())
  {
    std::cerr << "Could not open file" << endl;
    return;
  }

  // Create XML reader
  this->XMLReader->SetFileName(fileName.toUtf8().data());
  this->XMLReader->ReadTagNameOff();
  this->XMLReader->Update();

  // Set up some hard coded parameters for the graph view
  this->GraphView->SetVertexLabelArrayName("id");
  this->GraphView->VertexLabelVisibilityOn();
  this->GraphView->SetVertexColorArrayName("VertexDegree");
  this->GraphView->ColorVerticesOn();
  this->GraphView->SetEdgeColorArrayName("edge id");
  this->GraphView->ColorEdgesOn();

  // Create a tree layout strategy
  VTK_CREATE(vtkTreeLayoutStrategy, treeStrat);
  treeStrat->RadialOn();
  treeStrat->SetAngle(360);
  treeStrat->SetLogSpacingValue(1);
  this->GraphView->SetLayoutStrategy(treeStrat);

  // Set the input to the graph view
  this->GraphView->SetRepresentationFromInputConnection(this->XMLReader->GetOutputPort());

  // Okay now do an explicit reset camera so that
  // the user doesn't have to move the mouse
  // in the window to see the resulting graph
  this->GraphView->ResetCamera();

  // Now hand off tree to the tree view
  this->TreeView->SetRepresentationFromInputConnection(this->XMLReader->GetOutputPort());
  this->ColumnView->SetRepresentationFromInputConnection(this->XMLReader->GetOutputPort());

  // Extract a table and give to table view
  VTK_CREATE(vtkAttributeDataToTableFilter, toTable);
  toTable->SetInputConnection(this->XMLReader->GetOutputPort());
  toTable->SetFieldAssociation(vtkDataObject::FIELD_ASSOCIATION_VERTICES);
  this->TableView->SetRepresentationFromInputConnection(toTable->GetOutputPort());

  this->SetupCustomLink();

  // Hide an unwanted column in the tree view.
  this->TreeView->HideColumn(2);