Method RebuildBuffers

Views/Infovis/vtkDendrogramItem.cxx:226–276

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
void vtkDendrogramItem::RebuildBuffers()
{
  if (this->Tree->GetNumberOfVertices() == 0)
  {
    return;
  }

  // Special case where our input tree has been modified.  Refresh PrunedTree
  // to be an up-to-date full copy of it.
  if (this->Tree->GetMTime() > this->PrunedTree->GetMTime())
  {
    this->PrunedTree->DeepCopy(this->Tree);
  }

  int orientation = this->GetOrientation();

  vtkNew<vtkTreeLayoutStrategy> strategy;

  if (this->PrunedTree->GetVertexData()->GetAbstractArray(this->DistanceArrayName.c_str()) !=
    nullptr)
  {
    strategy->SetDistanceArrayName(this->DistanceArrayName.c_str());
  }

  strategy->SetLeafSpacing(1.0);

  strategy->SetRotation(this->GetAngleForOrientation(orientation));

  this->Layout->SetLayoutStrategy(strategy);
  this->Layout->SetInputData(this->PrunedTree);
  this->Layout->Update();
  this->LayoutTree = vtkTree::SafeDownCast(this->Layout->GetOutput());

  this->CountLeafNodes();
  this->ComputeMultipliers();
  this->ComputeBounds();

  if (this->ColorTree && !this->LegendPositionSet)
  {
    this->PositionColorLegend();
  }

  if (this->PrunedTree->GetMTime() > this->MTime)
  {
    this->DendrogramBuildTime = this->PrunedTree->GetMTime();
  }
  else
  {
    this->DendrogramBuildTime = this->MTime;
  }
}

//------------------------------------------------------------------------------
void vtkDendrogramItem::ComputeMultipliers()