The QDebug class, part of the Qt framework, provides an output stream for debugging information.
Documentation can be found here
Questions tagged [qdebug]
99 questions
3
votes
2 answers
QtCreator: qDebug Messages Not Shown
I am currently using QT Creator 3.2.1 with Qt 5.3.2 (as required by my current project) on Windows 7 (64 bits, Ultimate). I am currently working on a GUI project
I am unable to see any qDebug messages in the Application Output window despite…
darkarn
- 53
- 1
- 3
3
votes
1 answer
Printing qByteArray through qDebug
#include
#include
#include
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QByteArray dataReceivedFromSerialPort;
dataReceivedFromSerialPort.push_back(0x0A);
…
Aquarius_Girl
- 21,790
- 65
- 230
- 411
3
votes
2 answers
qDebug() doesn't print anything
I try to use Qt with CLion. My problem is that qDebug() doesn't print anything, but qInfo(), qWarning(), qCritical() and qFatal() works well. Here is my example code :
#include
#include
int main(int argc, char *argv[])…
Hello
- 161
- 1
- 7
3
votes
2 answers
qDebug and cout don't work
I have this simple code
#include
#include
#include
using namespace std;
int main(int argc, char **argv)
{
cout << "pluto" << endl;
QCoreApplication app(argc, argv);
qDebug() <<…
lukigno
- 31
- 1
3
votes
4 answers
qDebug() doesn't support unicode strings on Windows
I have a line edit that contains a file name with Unicode-characters and it displays correctly in the GUI, but when I print it with qDebug(), it shows the Unicode symbols as question marks.
For example, for "C:/Test/абв" this code will show only…
sashoalm
- 75,001
- 122
- 434
- 781
2
votes
1 answer
Qt enums comparison and output to QDebug
i am registering enums to the Qt meta-object system. i have double checked that all of those have a meta-type ID, and everything looks perfect. But i have some kind of unresolved issue with the comparison of those.
Let's consider this code for…
Doodloo
- 869
- 5
- 18
2
votes
1 answer
Qt and UTF-8: strange behaviour
To illustrate my problem I will give you an example:
I have UTF-8 encoded text file.
in.txt:
ąśćź
ąś
ŻźŹ
This program reads in.txt line by line and produces duplicate out.txt.
It not only duplicates the file but also prints it to console.
At the…
Maciej Ziarko
- 11,494
- 13
- 48
- 69
2
votes
3 answers
How to get QString qDebug output as string?
Let's have a look at this little application:
#include
#include
int main(int argc, char *argv[]) {
const auto test_string =
QString{"Some string \n \x01 \u0002 with some \r special chars"};
qDebug() << test_string;
…
FourtyTwo
- 1,616
- 2
- 15
- 43
2
votes
2 answers
QString formatting will not work qDebug
I try to avoid mixed QString and char* types in a QT program. I have a conversation function that returns a pointer of the data inside the QString, but I get very strange results. Whats wrong with this code?
Compiler and environment gcc (Debian…
huckfinn
- 644
- 6
- 23
2
votes
1 answer
Not seeing the output from qInfo()
New to QT, I've imported a project someone else made, and it compiles and runs on the MinGW version of QT Creator. But there's a small problem with it, that would be much easier to diagnose if I could see the debug output.
There are lines all over…
GemmaB89
- 165
- 2
- 16
2
votes
2 answers
Reading qDebug output of Apps on ios devices from command line
I am currently working on automated testing of Qt-Applications on devices running iOS. So far I am able to install and run these Applications fine, but I am unable to read their output. As far as I understood, reading this issue, Qt uses the gdb…
T3 H40
- 2,326
- 8
- 32
- 43
2
votes
1 answer
Wrong status when calling _exit(errno) from child
I'm calling execvp() with a deliberately wrong argument in a fork()'ed child. The errno number is properly set to ENOENT in the child process. I then terminate the child process with _exit(errno);.
My main process calls wait(). When I inspect the…
CuriousMan
- 101
- 6
2
votes
1 answer
Is there a length limitation of qDebug()<
In my code, I found one qDebug()<
zzy
- 1,771
- 1
- 13
- 48
2
votes
1 answer
QVector Append truncating/rounding values
I am using QVector.append to append a double to QVector. Using my debugger, I can see that the double has a value of 40.783333499999998, however, the QVector values are rounded to 40.7833. Again, I see this on my debugger, not using qDebug so I'm…
french13
- 75
- 1
- 7
2
votes
2 answers
std::cout gives different output from qDebug
I am using Qt, and I have an unsigned char *bytePointer and want to print out a number-value of the current byte. Below is my code, which is meant to give the int-value and the hex-value of the continuous bytes that I receive from a machine attached…
Admin Voter
- 251
- 1
- 12