QTextDocument : drawContents in a QRectF

CharlieG

Hello,

I want create a PDF file with QPdfWriter, QPainter and QTextDocument.

I can draw 3 rectangles for header (with image), body (for the text) and footer (with image), but I can't write the text in the body.

Here is a simple example :

    QString fileName = "/Users/charlie/test.pdf";
    QPdfWriter pdfWriter(fileName);
    QPainter painter;
    pdfWriter.setResolution(300);

    QPageSize pageSize(QPageSize::A4);
    QMarginsF margins(10, 10, 10, 10);
    QPageLayout pageLayout(pageSize, QPageLayout::Portrait, margins, QPageLayout::Millimeter);
    pdfWriter.setPageLayout(pageLayout);

    painter.begin(&pdfWriter);

    QRectF headerRect(0, 0, mm2px(pdfWriter.widthMM()), 100);
    QRectF bodyRect(0, headerRect.bottom(), mm2px(pdfWriter.widthMM()), 600);

    painter.setPen(Qt::red);
    painter.drawRect(headerRect);

    painter.setPen(Qt::blue);
    painter.drawRect(bodyRect);
    QTextDocument td;
    //painter.translate(bodyRect.x(), bodyRect.y());
    td.setHtml("<font size=16>K<sub>max</sub>=K<sub>2</sub> &middot; 3</font>");
    td.drawContents(&painter, bodyRect);

    painter.end();
    QDesktopServices::openUrl(QUrl("file:"+fileName));

In this example, the text is not draw, but if replace : td.drawContents(&painter, bodyRect); by td.drawContents(&painter, headerRect);, this works !!!!
In my case, painter.translate() don't have effect.

I don't understand why. Can you help me ?

Thank you very much in advance.

Charlie.

Chris Kawa

Second parameter to drawContents is a clipping rect, not a destination rect i.e. the contents of your text document are clipped to that rectangle. Using translate is the way to go. Just don't clip the document:

    painter.translate(bodyRect.topLeft());
    td.setHtml("<font size=16>K<sub>max</sub>=K<sub>2</sub> &middot; 3</font>");
    td.drawContents(&painter);

CharlieG

Hi,

It's work. Thank.

Concerning the second parameter to drawContent, I thought it would allow to use a "wrap mode" on my text. But it is not the solution.

In fact, this is better with this code :

...
QTextOption textOption;
textOption.setAlignment(Qt::AlignJustify);
textOption.setWrapMode(QTextOption::WordWrap);
td.setDefaultTextOption(textOption);
td.setTextWidth(bodyRect.width());
td.setHtml(myHtml);
...

Sorry for the inconvenience.

++

Charlie