Method paintEvent

Qt/Python/pqPythonLineNumberArea.cxx:39–68

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

  const QPalette& palette = this->palette();

  painter.fillRect(event->rect(), palette.window());
  painter.setFont(this->TextEdit.font());

  const QSize size = this->sizeHint();

  std::int32_t firstBlockId = std::max(0, details::getFirstVisibleBlockId(this->TextEdit) - 1);
  QTextBlock block = this->TextEdit.document()->findBlockByNumber(firstBlockId);

  while (block.isValid() && block.isVisible())
  {
    const QTextCursor blockCursor(block);
    const QRect blockCursorRect = this->TextEdit.cursorRect(blockCursor);

    painter.setPen((this->TextEdit.textCursor().blockNumber() == firstBlockId)
        ? palette.text().color()
        : palette.placeholderText().color());
    const QString number = QString::number(firstBlockId + 1);
    painter.drawText(-5, blockCursorRect.y() + 2, size.width(),
      this->TextEdit.fontMetrics().height(), Qt::AlignRight, number);

    block = block.next();
    firstBlockId++;
  }
}