Method OnMouseMoved

Modules/Segmentation/src/Interactions/mitkRegionGrowingTool.cpp:375–440

}

void mitk::RegionGrowingTool::OnMouseMoved(StateMachineAction*, InteractionEvent* interactionEvent)
{
  auto* positionEvent = dynamic_cast<mitk::InteractionPositionEvent*>(interactionEvent);
  if (nullptr == positionEvent)
  {
    return;
  }

  if (m_ReferenceSlice.IsNull())
  {
    return;
  }

  // Get geometry and indices
  mitk::BaseGeometry::Pointer workingSliceGeometry;
  workingSliceGeometry = m_WorkingSlice->GetGeometry();
  itk::Index<2> indexInWorkingSlice2D;
  indexInWorkingSlice2D[0] = m_SeedPoint[0];
  indexInWorkingSlice2D[1] = m_SeedPoint[1];

  m_ScreenYDifference += positionEvent->GetPointerPositionOnScreen()[1] - m_LastScreenPosition[1];
  m_ScreenXDifference += positionEvent->GetPointerPositionOnScreen()[0] - m_LastScreenPosition[0];
  m_LastScreenPosition = Point2I(positionEvent->GetPointerPositionOnScreen());

  // Moving the mouse up and down adjusts the width of the threshold window,
  // moving it left and right shifts the threshold window
  m_Thresholds[0] = std::min(
    m_SeedValue, m_InitialThresholds[0] - (m_ScreenYDifference - m_ScreenXDifference) * m_MouseDistanceScaleFactor);
  m_Thresholds[1] = std::max(
    m_SeedValue, m_InitialThresholds[1] + (m_ScreenYDifference + m_ScreenXDifference) * m_MouseDistanceScaleFactor);

  // Do not exceed the pixel type extrema of the reference slice, though
  m_Thresholds[0] = std::max(m_ThresholdExtrema[0], m_Thresholds[0]);
  m_Thresholds[1] = std::min(m_ThresholdExtrema[1], m_Thresholds[1]);

  // Perform region growing again and show the result
  mitk::Image::Pointer resultImage = mitk::Image::New();
  AccessFixedDimensionByItk_3(
    m_ReferenceSlice, StartRegionGrowing, 2, indexInWorkingSlice2D, m_Thresholds, resultImage);
  resultImage->SetGeometry(workingSliceGeometry);

  // Update the contour
  if (resultImage.IsNotNull() && m_ConnectedComponentValue >= 1)
  {
    float isoOffset = 0.33;

    mitk::ImageToContourModelFilter::Pointer contourExtractor = mitk::ImageToContourModelFilter::New();
    contourExtractor->SetInput(resultImage);
    contourExtractor->SetContourValue(m_ConnectedComponentValue - isoOffset);
    contourExtractor->Update();
    ContourModel::Pointer resultContour = ContourModel::New();
    resultContour = contourExtractor->GetOutput();

    // Show contour
    if (resultContour.IsNotNull())
    {
      ContourModel::Pointer resultContourWorld = FeedbackContourTool::BackProjectContourFrom2DSlice(
        workingSliceGeometry, FeedbackContourTool::ProjectContourTo2DSlice(m_WorkingSlice, resultContour));