Method paintStatisticsData

YUViewLib/src/statistics/StatisticsDataPainting.cpp:258–996

} // namespace

void stats::paintStatisticsData(QPainter *             painter,
                                stats::StatisticsData &statisticsData,
                                int                    frameIndex,
                                double                 zoomFactor)
{
  if (statisticsData.getFrameIndex() != frameIndex)
  {
    DEBUG_PAINT("StatisticsData::paintStatistics Frame index was not updated. Use setFrameIndex "
                "first and load data.");
    return;
  }

  // Save the state of the painter. This is restored when the function is done.
  painter->save();
  painter->setRenderHint(QPainter::Antialiasing, true);

  QRect statRect;
  auto  frameSize = statisticsData.getFrameSize();
  statRect.setSize(QSize(frameSize.width * zoomFactor, frameSize.height * zoomFactor));
  statRect.moveCenter(QPoint(0, 0));

  // Get the visible coordinates of the statistics
  auto viewport       = painter->viewport();
  auto worldTransform = painter->worldTransform();
  int  xMin           = statRect.width() / 2 - worldTransform.dx();
  int  yMin           = statRect.height() / 2 - worldTransform.dy();
  int  xMax           = statRect.width() / 2 - (worldTransform.dx() - viewport.width());
  int  yMax           = statRect.height() / 2 - (worldTransform.dy() - viewport.height());

  painter->translate(statRect.topLeft());

  auto &statsTypes = statisticsData.getStatisticsTypes();

  // First, get if more than one statistic that has block values is rendered.
  bool moreThanOneBlockStatRendered = false;
  bool oneBlockStatRendered         = false;
  for (const auto &type : statsTypes)
  {
    if (type.render && type.hasValueData)
    {
      if (oneBlockStatRendered)
      {
        moreThanOneBlockStatRendered = true;
        break;
      }
      else
        oneBlockStatRendered = true;
    }
  }

  std::unique_lock<std::mutex> lock(statisticsData.accessMutex);

  // Draw all the block types. Also, if the zoom factor is larger than STATISTICS_DRAW_VALUES_ZOOM,
  // also save a list of all the values of the blocks and their position in order to draw the values
  // in the next step.
  QList<QPoint>      drawStatPoints; // The positions of each value
  QList<QStringList> drawStatTexts;  // For each point: The values to draw
  double             maxLineWidth =