Method UpdateWindowInfo

Rendering/Label/vtkLabeledTreeMapDataMapper.cxx:183–223

}

int vtkLabeledTreeMapDataMapper::UpdateWindowInfo(vtkViewport* viewport)
{
  // Assumes that the view is not rotated w/r to the tree map!
  int* dc;
  float p[2][2];
  this->VCoord->SetViewport(viewport);
  // Transform 0,0 and 1,1 into screen coordinates
  this->VCoord->SetValue(0.0, 0.0, 0.0);
  dc = VCoord->GetComputedDisplayValue(nullptr);
  p[0][0] = dc[0];
  p[0][1] = dc[1];
  this->VCoord->SetValue(1.0, 1.0, 0.0);
  dc = this->VCoord->GetComputedDisplayValue(nullptr);
  p[1][0] = dc[0];
  p[1][1] = dc[1];

  // The translation is defined by 0,0's new position
  this->BoxTrans[0][0] = p[0][0];
  this->BoxTrans[1][0] = p[0][1];

  // The scales are defined as p[1] - p[0]
  this->BoxTrans[0][1] = p[1][0] - p[0][0];
  this->BoxTrans[1][1] = p[1][1] - p[0][1];

  // Get the window extents
  vtkWindow* win = viewport->GetVTKWindow();
  const int* winPos = win->GetPosition();
  this->WindowLimits[0][0] = winPos[0];
  this->WindowLimits[1][0] = winPos[1];
  const int* winSize = win->GetSize();
  this->WindowLimits[0][1] = this->WindowLimits[0][0] + winSize[0];
  this->WindowLimits[1][1] = this->WindowLimits[1][0] + winSize[1];

  // We are done with the coordinate, so release the viewport
  this->VCoord->SetViewport(nullptr);

  // Ideally we can compare the new scales with the original and
  // see if the change has exceeded some threshold - in that case
  // we could return 0
  return 1;
}

void vtkLabeledTreeMapDataMapper::GetVertexLabel(vtkIdType vertex, vtkDataArray* numericData,
  vtkStringArray* stringData, int activeComp, int numComp, char* string, size_t stringSize)