gistfile1.txt

    QTableView::resizeEvent(event);

    int columns = this->model()->columnCount();

    int totalHeaderWidth = 0;
    for (int column = 0; column < columns; column++)
    {
        totalHeaderWidth += horizontalHeader()->sectionSizeHint(column);
    }

    //???
    int availableWidth = event->size().width() - this->verticalOffset();
    int freeSpace = availableWidth - totalHeaderWidth;

    for (int column = 0; column < columns; column++)
    {
        int contentWidth = sizeHintForColumn(column);
        int headerWidth = horizontalHeader()->sectionSizeHint(column);
        int width = headerWidth;

        if (freeSpace)
        {
            qreal stretchFactor = 1.0;
            //get stretch factor based on content
            stretchFactor = ((qreal)contentWidth)/((qreal)totalHeaderWidth);
            width = stretchFactor * freeSpace + headerWidth;

            qDebug() << stretchFactor << freeSpace << contentWidth << headerWidth << totalHeaderWidth;
        }

        setColumnWidth(column, width);
    }