Question

Header:

#define TRACE_ERROR(s)                      \
{
  ...
  char TraceBuffer[512];
  sprintf(TraceBuffer, "%s\t(%s:%d)", s, __FILE__, __LINE__);
  DebugErrTrace(TraceBuffer);
  ...
}

Implementation:

void DebugErrTrace(char *String, ...) {
  ...
  qDebug() << String;
}

The above spits out a line of debug trace, which might look something like

ERROR File Missing! (..\trunk\Common\FileManager.cpp:102)

in Qt Creator’s debug console.

I’ve noticed that Qt’s own error messages e.g.

Object::connect: No such slot cClass::Method(QString) in ..\trunk\Components\Class.cpp:301

create what looks like a hyperlink around the __FILE__:__LINE__ part of the debug line, linking to the line which caused the problem. Is there any way I can I do this with my own debug output?

Cheers, Sam

Answer 1

According to Qt Creator source code (there), the hyperlinks are only created for lines matching these regular expressions:

"^(?:\\[Qt Message\\] )?(file:///.+:\\d+(?::\\d+)?):"
"Object::.*in (.*:\\d+)"
"ASSERT: .* in file (.+, line \\d+)"
"^   Loc: \\[(.*)\\]"

So the simplest lines you could construct look like this:

qWarning("file:///%s:%i: %s", __FILE__, __LINE__, "your message");
qWarning("   Loc: [%s:%i] %s", __FILE__, __LINE__, "your message");

Qt Creator doesn’t seem to care if the path after "file:///" is absolute or not.