Method drawSubGridLines

qcustomplot/qcustomplot.cpp:7347–7369

! \internal Draws the sub grid lines with the specified painter. This is a helper function called by \ref draw. */

  This is a helper function called by \ref draw.
*/
void QCPGrid::drawSubGridLines(QCPPainter *painter) const
{
  if (!mParentAxis) { qDebug() << Q_FUNC_INFO << "invalid parent axis"; return; }
  
  applyAntialiasingHint(painter, mAntialiasedSubGrid, QCP::aeSubGrid);
  double t; // helper variable, result of coordinate-to-pixel transforms
  painter->setPen(mSubGridPen);
  if (mParentAxis->orientation() == Qt::Horizontal)
  {
    for (int i=0; i<mParentAxis->mSubTickVector.size(); ++i)
    {
      t = mParentAxis->coordToPixel(mParentAxis->mSubTickVector.at(i)); // x
      painter->drawLine(QLineF(t, mParentAxis->mAxisRect->bottom(), t, mParentAxis->mAxisRect->top()));
    }
  } else
  {
    for (int i=0; i<mParentAxis->mSubTickVector.size(); ++i)
    {
      t = mParentAxis->coordToPixel(mParentAxis->mSubTickVector.at(i)); // y
      painter->drawLine(QLineF(mParentAxis->mAxisRect->left(), t, mParentAxis->mAxisRect->right(), t));
    }
  }
}


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