<![CDATA[[SOLVED]QByteArray values to hex formatted QString]]>Hi!

I'd like to display QByteArray byte values in my plaintextedit in the following format:

00 00 00 .... 00 (20 values per line)
00 00 00 ... 00
..etc

I'm using QString::number ( qbytearray[i], 16) but it casts to long/int/uint formats and byte numbers>0x7f show up in the form of ffffffxx (for example if my byte=0xC0 then the output will be ffffffc0). I'm new to Qt so before I dive into improvised variable manipulations I'd like to ask if there is an easier method provided by Qt libraries. Thank you

]]>https://forum.qt.io/topic/25145/solved-qbytearray-values-to-hex-formatted-qstringRSS for NodeSun, 14 Jun 2026 16:13:00 GMTWed, 13 Mar 2013 10:28:27 GMT60<![CDATA[Reply to [SOLVED]QByteArray values to hex formatted QString on Wed, 13 Mar 2013 11:05:05 GMT]]>in that case I would check the source of hexdump.
I know it is in C but it gives you an idea how to program that routine quite fast.

]]>https://forum.qt.io/post/170080https://forum.qt.io/post/170080Wed, 13 Mar 2013 11:05:05 GMT<![CDATA[Reply to [SOLVED]QByteArray values to hex formatted QString on Wed, 13 Mar 2013 11:00:07 GMT]]>[quote]Did you consider using QByteArray::toHex() for that?[/quote]

Andre, thank you for the tip, I came up with a solution using the ::toHex method you suggested.

[quote]it sounds to me that you are trying to develop a HexEditor.[/quote]

Messi, thank you for your help, I'll check your links later. It is not a hex editor but a simple app which displays the received bytes from the serial port.

[quote]I think this would result in the wanted output since you want to interpret it as an unsigned value [/quote]

Thank you dvdk.

Edit: @ tags are for code sections, not for quoting previous posts; Andre

]]>https://forum.qt.io/post/170078https://forum.qt.io/post/170078Wed, 13 Mar 2013 11:00:07 GMT<![CDATA[Reply to [SOLVED]QByteArray values to hex formatted QString on Wed, 13 Mar 2013 10:48:27 GMT]]>I think this would result in the wanted output since you want to interpret it as an unsigned value :
@
QString::number ((uchar) qbytearray[i], 16)
@

]]>https://forum.qt.io/post/170076https://forum.qt.io/post/170076Wed, 13 Mar 2013 10:48:27 GMT<![CDATA[Reply to [SOLVED]QByteArray values to hex formatted QString on Wed, 13 Mar 2013 10:43:47 GMT]]>Hi JustGreg
it sounds to me that you are trying to develop a HexEditor.
If it so, have you checked:
http://qt-apps.org/content/show.php/QHexEdit?content=133189

Anyway, as usual the doc or google is your friend.
google for "qt from int to hex "
Gives you the following result:
http://qt-project.org/forums/viewthread/7194
http://www.developer.nokia.com/Community/Wiki/Convert_hexadecimal_to_decimal_and_vice-versa_in_Qt

]]>https://forum.qt.io/post/170074https://forum.qt.io/post/170074Wed, 13 Mar 2013 10:43:47 GMT<![CDATA[Reply to [SOLVED]QByteArray values to hex formatted QString on Wed, 13 Mar 2013 10:43:21 GMT]]>Did you consider using QByteArray::toHex() for that? The result will not be formatted like you are showing, but that should be easy enough to do as a next step.

edit
Alternatively, you could consider a completely different approach. You could create a custom model operating on your byte array, and use a QTableView to display the values instead.

]]>https://forum.qt.io/post/170072https://forum.qt.io/post/170072Wed, 13 Mar 2013 10:43:21 GMT