Method drawCandlestickPlot

qcustomplot/qcustomplot.cpp:26811–26874

! \internal Draws the data from \a begin to \a end-1 as Candlesticks with the provided \a painter. This method is a helper function for \ref draw. It is used when the chart style is \ref csCandlestick. */

  This method is a helper function for \ref draw. It is used when the chart style is \ref csCandlestick.
*/
void QCPFinancial::drawCandlestickPlot(QCPPainter *painter, const QCPFinancialDataContainer::const_iterator &begin, const QCPFinancialDataContainer::const_iterator &end, bool isSelected)
{
  QCPAxis *keyAxis = mKeyAxis.data();
  QCPAxis *valueAxis = mValueAxis.data();
  if (!keyAxis || !valueAxis) { qDebug() << Q_FUNC_INFO << "invalid key or value axis"; return; }
  
  if (keyAxis->orientation() == Qt::Horizontal)
  {
    for (QCPFinancialDataContainer::const_iterator it = begin; it != end; ++it)
    {
      if (isSelected && mSelectionDecorator)
      {
        mSelectionDecorator->applyPen(painter);
        mSelectionDecorator->applyBrush(painter);
      } else if (mTwoColored)
      {
        painter->setPen(it->close >= it->open ? mPenPositive : mPenNegative);
        painter->setBrush(it->close >= it->open ? mBrushPositive : mBrushNegative);
      } else
      {
        painter->setPen(mPen);
        painter->setBrush(mBrush);
      }
      double keyPixel = keyAxis->coordToPixel(it->key);
      double openPixel = valueAxis->coordToPixel(it->open);
      double closePixel = valueAxis->coordToPixel(it->close);
      // draw high:
      painter->drawLine(QPointF(keyPixel, valueAxis->coordToPixel(it->high)), QPointF(keyPixel, valueAxis->coordToPixel(qMax(it->open, it->close))));
      // draw low:
      painter->drawLine(QPointF(keyPixel, valueAxis->coordToPixel(it->low)), QPointF(keyPixel, valueAxis->coordToPixel(qMin(it->open, it->close))));
      // draw open-close box:
      double pixelWidth = getPixelWidth(it->key, keyPixel);
      painter->drawRect(QRectF(QPointF(keyPixel-pixelWidth, closePixel), QPointF(keyPixel+pixelWidth, openPixel)));
    }
  } else // keyAxis->orientation() == Qt::Vertical
  {
    for (QCPFinancialDataContainer::const_iterator it = begin; it != end; ++it)
    {
      if (isSelected && mSelectionDecorator)
      {
        mSelectionDecorator->applyPen(painter);
        mSelectionDecorator->applyBrush(painter);
      } else if (mTwoColored)
      {
        painter->setPen(it->close >= it->open ? mPenPositive : mPenNegative);
        painter->setBrush(it->close >= it->open ? mBrushPositive : mBrushNegative);
      } else
      {
        painter->setPen(mPen);
        painter->setBrush(mBrush);
      }
      double keyPixel = keyAxis->coordToPixel(it->key);
      double openPixel = valueAxis->coordToPixel(it->open);
      double closePixel = valueAxis->coordToPixel(it->close);
      // draw high:
      painter->drawLine(QPointF(valueAxis->coordToPixel(it->high), keyPixel), QPointF(valueAxis->coordToPixel(qMax(it->open, it->close)), keyPixel));
      // draw low:
      painter->drawLine(QPointF(valueAxis->coordToPixel(it->low), keyPixel), QPointF(valueAxis->coordToPixel(qMin(it->open, it->close)), keyPixel));