Create PDF with automatically new page (QTExtDocument, QTextCursor, ...)

[CharlieG]

Hello,

Here a code which allow me te create a pdf with automatically add a new page :

void Class1::addContent()
{
    m_painter->setPen(Qt::green);
    m_painter->drawRect(m_rectContent);

    QTextDocument tdContent;
    QTextOption textOptionContent;
    textOptionContent.setAlignment(Qt::AlignJustify);
    textOptionContent.setWrapMode(QTextOption::WordWrap);
    tdContent.setDefaultTextOption(textOptionContent);
    tdContent.setTextWidth(m_writer->width());

    setContent(&tdContent, 0); 
}

void Class1::setContent(QTextDocument *doc, int beginPosition)
{
    doc->clear();
    QString htmlText;
    m_cursor = new QTextCursor(doc);
    m_cursor->insertHtml(m_totalHtml);
    //m_html is my QString to print

    int lenTextToPrint = m_cursor->selectionEnd()-beginPosition;

    qDebug() << "   ";
    qDebug() << "============";
    qDebug() << "Page n°" << m_nbPage;
    qDebug() << "Initial text lenght" << m_cursor->selectionEnd();
    qDebug() << "Begin position" << beginPosition;
    qDebug() << "Text to print" << lenTextToPrint;

    if (beginPosition != 0)
    {
        m_cursor->setPosition(beginPosition-1);
        m_cursor->movePosition(QTextCursor::End, QTextCursor::KeepAnchor);
        htmlText = m_cursor->selection().toHtml();
        m_cursor->select(QTextCursor::Document);
        m_cursor->removeSelectedText();
        m_cursor->insertHtml(htmlText);
    }
    else {
        htmlText = m_totalHtml;
    }

    qDebug() << "Current TextDoc height" << doc->documentLayout()->documentSize().height();
    qDebug() << "Available per page" << m_rectContent.height();

    int actPosi = 0;
    if (doc->documentLayout()->documentSize().height() > m_rectContent.height()){
        doc->clear();
        while(doc->documentLayout()->documentSize().height() < m_rectContent.height())
        {
            QTextCursor *cursor = new QTextCursor(doc);
            cursor->insertHtml(htmlText);
            cursor->setPosition(actPosi);
            cursor->movePosition(QTextCursor::Down);
            actPosi = cursor->position();

            cursor->movePosition(QTextCursor::End, QTextCursor::KeepAnchor);
            cursor->removeSelectedText();
        }
        paintContent(doc);

        m_alreadyPaint += actPosi;
        qDebug() << "Last Position" << actPosi;
        qDebug() << "Already print" << m_alreadyPaint;
        if (actPosi < lenTextToPrint){
            newPage();
            setContent(doc, m_alreadyPaint);
        }
    }
    else {
        paintContent(doc);
    }
}

void Class1::paintContent(QTextDocument *doc)
{
    m_painter->save();
    m_painter->translate(m_rectContent.topLeft());
    doc->drawContents(m_painter);
    m_painter->restore();
}

void Class1::print()
{
    m_writer = new QPdfWriter(m_fileName);
    m_writer->setResolution(m_resolution);
    QPageSize pageSize(QPageSize::A4);
    QMarginsF margins(m_margins, m_margins, m_margins, m_margins);
    QPageLayout pageLayout(pageSize, QPageLayout::Portrait, margins, QPageLayout::Millimeter);
    m_writer->setPageLayout(pageLayout);
    m_nbPage = 1;
    m_heightAvailable = m_writer->height();
    m_rectContent.setCoords(0, 0, m_writer->width(), 0);
    m_painter = new QPainter(m_writer);

    addContent();
}

I have 2 questions :

• Do you have any suggestions for improving my code or otherwise ?
• Sometimes the new pages begin with a letter less to the first, have you an idea to fixe the issues ?

You can test my code by downloading it here : https://github.com/jiyuusoft/QMLReports

Thank you in advance for your help and comments.

Charlie

[VRonin]

I'm not sure I got what the end goal is. Are you trying to achieve something like this?

[CharlieG]

@VRonin
Indeed this allows to simplify the code for the creation of the new pages automatically. However, I need to review how to handle headers and footers for each page. If it's simpler, why not ...