PDF output from QPrinter cuts last letter of words if the html characters are generated with cyrillic support

mardzo

I am creating a software for Windows 10 with QT 5.7. So, basically I generate a QString named htmltable that i fill with html. I use the function for PDF printing:

    QPrinter printer;

    printer.setResolution(QPrinter::HighResolution);

    printer.setOutputFormat(QPrinter::PdfFormat);

    printer.setOutputFileName(fileName);

   // printer.setFullPage(true);

    printer.setOrientation(QPrinter::Portrait);

    printer.setPaperSize(QPrinter::A4);

    QSizeF size = printer.paperSize(QPrinter::Point);

    QTextDocument doc;

    doc.setHtml(htmltable);

    doc.setPageSize(size);

    doc.print(&printer);`

The pages print fine if the characters in the words are latin. But if they are written with cyrillic support, the last character of some of the words is cut-off as seen on the picture bellow. This only happens if the font-size attribute is smaller for example 4pt. As you can see when the font is bigger there are no cut offs even on cyrillic characters.

alt text

Any suggestions?

mrjj

How does it look on screen using a QTextDocument + QTextEdit ?

mardzo

@mrjj Do you mean like this?

   QTextEdit *edit = new QTextEdit(this);

    edit->setText(doc.toHtml());
    edit->resize(1500,1748);

    edit->show();
    edit->raise();

In the QTextEdit the letters are fine in cyrillic. So the problem is in the printer ? :((

mrjj

Hi
Not sure yet. It could be the font when converted to "printer".
Could you now print it via QTextEdit ?
http://doc.qt.io/qt-5/qtextedit.html#print
Just to see if it then blows or what happening.

mardzo

@mrjj i try to print it like this:


        QSizeF size = printer.paperSize(QPrinter::Point);

        QTextDocument doc;

        doc.setHtml(htmltable);

        doc.setPageSize(size);

        QTextEdit *edit = new QTextEdit(this);

        edit->setText(doc.toHtml());
        edit->resize(size.toSize());

        edit->show();
        edit->raise();

       // doc.print(&printer);


       edit->print(&printer);

but i get like 200 blank pdf pages and i know i should only get one. I think i am not setting the size correctly for the qtextedit

mrjj

Ok, That's surprising as

QSizeF size = printer.paperSize(QPrinter::Point);
edit->resize(size);

I thought it would get really huge ?
Did u check the value for size?

Maybe try
QSizeF size = printer.paperSize(QPrinter::DevicePixel);
edit->resize(size);
And see what happens as it sounds like it TExtEdit got really small :)

mardzo

@mrjj I tried your code i got the same result. I remember experiencing this behaviour when i was using qtextdocument without setting the page size().

mrjj

@mardzo
Ah, that sounds like thats the issue and it then will "page break" in other places as
expected.
Im wondering if the HTML code contains anything
"fixed size"-ish that dont scale so well between screen and printer DPI.

mardzo

@mrjj well the html table has a fixed width=440 and style = "margin-top:50px; margin-right:20px; " Im a bit new at QT and i dont understand how the latin letters are displayed correctly and cyrillic at the end of a word are the only one that are cut off

mrjj

@mardzo
Yes that is a bit odd. But cyrillic is another font, i assume?
So it could react differently being upscaled/created for the printer context.
A printer has many more DPI than the screen so some scaling is involved as else
it would just be ultra tiny. ( when printed)
Could also be a bug in the font handling so the actual size of the cyrillic is reported incorrectly.

Is it possivble to get the actual HTML that you print?
( so I can try it)

mardzo

@mrjj I create it dynamically so i cant send it all. I tried so save it all in a txt file, but the cyrilic characters are replaced with ??????. here is a small snippet with cyrilic characters in it. Im sorry for the bad formatting

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <meta name="qrichtext" content="1">
   <title>QTextEdit Example</title>
        <style type="text/css">p, li { white-space: pre-wrap; } </style>
</head>
<body style=" font-family:Tahoma; font-size:9pt; font-weight:300; font-style:normal;">
	<table align=center style = "margin-top:50px;  margin-right:20px; ">
  		<tr><th><h2>Извештај за настани од контрола на пристап</h2></th>	    </tr> 
     </table>
	<table align=center style='margin-top:10px;  margin-right:20px; '>
   		<tr>
        	<td>Филтер:</td>
            <td>Сите логови</td>
            <td>Од:</td>
            <td>28.11.2016</td>                          
            <td>До:</td> 				
            <td>28.11.2016</td>
        </tr>
   </table>"
   <table style = 'text-align: left; padding: 1px; background-color: #fff; font-size:6pt;'
                      border=2  align=center cellspacing=1 width=440 > 
   		<tr> 
        	<th>Бр.</th> 
        	<th>Уред</th> 
       		 <th>Лог</th> 
        	 <th>Врата</th> 
        	 <th>Корисник</th> 
             <th>Датум и Време</th> 
        </tr>
    </table>
</body>
</html>

mrjj

Hi
Super.
I get this
alt text

Is that ok test case?

mardzo

@mrjj yes, this is okay but what happens when you try to set style="font-size : 6pt;" on the table and export it as pdf? Does it cut the last letter of the cyrillic words? I edited the previously posted html

mrjj

Hi
Super.
style="font-size : 6pt;"
As set stylesheet on it or?

I will retry with the new html.

mardzo

@mrjj yes, try with the exact new html i posted

mrjj

@mardzo
Hmm seems to be 1-1 one
alt text

Can we try reverse and see if u get same?
https://www.dropbox.com/s/kxu7drheoulah3p/myTextEdit.zip?dl=0

mardzo

@mrjj yes your project works fine i have tried it and got a good pdf :). But did u notice that when u input the html in the qtextedit in the ui it alters the html adding spans. paragrarphs etc.? Do u suggest for me to change my html table based on the changes the QT Designer made to it?

mardzo

Bloody hell! I figured it out. The only thing i needed to do was to put <span></span> inside the table cells. Thanks @mrjj for your help.

mrjj

@mardzo
Super. Good work. Well i was wondering what the difference was between screen
and pdf and you found it :)