Method paintEvent

Modules/QtWidgets/src/QmitkSliderLevelWindowWidget.cpp:101–283

}

void QmitkSliderLevelWindowWidget::paintEvent(QPaintEvent *itkNotUsed(e))
{
  QPixmap pm(width(), height());
  pm.fill(this->palette().color(this->backgroundRole()));
  QPainter painter(&pm);

  painter.setFont(m_Font);
  painter.setPen(this->palette().color(this->foregroundRole()));

  QColor c(51, 153, 204);
  QColor cl = c.lighter();
  QColor cd = c.darker();

  painter.setBrush(c);
  painter.drawRect(m_Rect);

  mitk::ScalarType mr = m_LevelWindow.GetRange();
  float smallestLevelableValue = 1e-9;

  //This check is needed as safe guard. LevelWindow is refactored to only deduce finite ranges
  //from images, but old scene serialization may contain infinite ranges that overwrite the new
  //business logic. This roots in two many "jobs" LevelWindow" is used for; see also T24962.
  //Until LevelWindow and this widget is refactored the check was the minimal invasive fix.
  if (!std::isfinite(mr))
  {
    mr = m_LevelWindow.GetWindow();
  }


  // avoiding a division by 0 while still enabling small level windows
  if (mr < smallestLevelableValue)
    mr = smallestLevelableValue;

  mitk::ScalarType fact = m_MoveHeight / mr;

  // begin draw scale
  if (m_ScaleVisible)
  {
    mitk::ScalarType minRange = m_LevelWindow.GetRangeMin();
    mitk::ScalarType maxRange = m_LevelWindow.GetRangeMax();

    //This check is needed as safe guard. LevelWindow is refactored to only deduce finite ranges
    //from images, but old scene serialization may contain infinite ranges that overwrite the new
    //business logic. This roots in two many "jobs" LevelWindow" is used for; see also T24962.
    //Until LevelWindow and this widget is refactored the check was the minimal invasive fix.
    if (!std::isfinite(minRange))
    {
      minRange = m_LevelWindow.GetLowerWindowBound();
    }
    //This check is needed as safe guard. LevelWindow is refactored to only deduce finite ranges
    //from images, but old scene serialization may contain infinite ranges that overwrite the new
    //business logic. This roots in two many "jobs" LevelWindow" is used for; see also T24962.
    //Until LevelWindow and this widget is refactored the check was the minimal invasive fix.
    if (!std::isfinite(maxRange))
    {
      maxRange = m_LevelWindow.GetUpperWindowBound();
    }