Method updateForFieldOfView

ASAP/ScaleBar.cpp:21–69

}

void ScaleBar::updateForFieldOfView(const QRectF& fieldOfView) {
  QWidget* parent = this->parentWidget();
  if (parent) {
    float parentWidth = parent->width();
    float FOVWidth = fieldOfView.width();
    QString label;
    float imagePixelsPerScreenPixel = FOVWidth / parentWidth;
    if (this->_resolution > 0) {
      float micronsPerScreenPixel = imagePixelsPerScreenPixel * this->_resolution;
      unsigned int increment = 1000;
      for (int i = 10000; i > 0; i -= increment) {
        if (i <= 1000) {
          increment = 250;
        }
        if (i <= 250) {
          increment = 25;
        }
        if (i / micronsPerScreenPixel < 300) {
          _currentWidth = i / micronsPerScreenPixel;
          updateGeometry();
          if (i >= 1000) {
            _currentLabel = QString::number(i / 1000) + " mm";
          }
          else {
            _currentLabel = QString::number(i) + " um";
          }
          break;
        }
      }
    }
    else {
      unsigned int increment = 1000;
      for (int i = 10000; i > 0; i -= increment) {
        if (i <= 1000) {
          increment = 250;
        }
        if (i <= 250) {
          increment = 25;
        }
        if (i / imagePixelsPerScreenPixel < 300) {
          _currentWidth = i / imagePixelsPerScreenPixel;
          updateGeometry();
          _currentLabel = QString::number(i) + " pixels";
          break;
        }
      }
    }
  }
}

void ScaleBar::paintEvent(QPaintEvent *event) {
  QPainter painter(this);