Method convertPlotPosToPixelPos

YUViewLib/src/ui/views/PlotViewWidget.cpp:953–987

}

QPointF PlotViewWidget::convertPlotPosToPixelPos(const QPointF &       plotPos,
                                                 std::optional<double> zoomFactor) const
{
  if (!zoomFactor)
    zoomFactor = this->zoomFactor;

  Range<double> yRange = {0, 100};
  if (this->model)
    yRange = this->model->getYRange();
  const auto rangeY = double(yRange.max - yRange.min);

  const auto pixelPosX = this->propertiesAxis[0].line.p1().x() +
                         (plotPos.x() * this->zoomToPixelsPerValueX) * (*zoomFactor) +
                         this->moveOffset.x();

  // line.p1 maps to the maximum y value and line.p2 to the lowest value
  if (this->fixYAxis)
  {
    const auto lineLength =
        this->propertiesAxis[1].line.p1().y() - this->propertiesAxis[1].line.p2().y();
    const auto relativePos = (plotPos.y() - yRange.min) / rangeY;
    const auto pixelPosY   = this->propertiesAxis[1].line.p1().y() - (relativePos * lineLength);
    return {pixelPosX, pixelPosY};
  }
  else
  {
    const auto rangeY = double(yRange.max - yRange.min);
    const auto zoomToPixelsPerValueY =
        (this->propertiesAxis[1].line.p1().y() - this->propertiesAxis[1].line.p2().y()) / rangeY;
    const auto pixelPosY = this->propertiesAxis[1].line.p1().y() -
                           (plotPos.y() * zoomToPixelsPerValueY) * (*zoomFactor) +
                           this->moveOffset.y();
    return {pixelPosX, pixelPosY};
  }
}

QPointF PlotViewWidget::convertPixelPosToPlotPos(const QPointF &       pixelPos,
                                                 std::optional<double> zoomFactor) const