Qt creator 4.11，在应用程序 output 面板中创建链接

Question

I desesperatly try to find a way to make the application output panel a bit more useful by printing an error with a file path and a line number (basically _ FILE _ and _ LINE _ macros) and make it clickable from the pannel to go directly in the source file in the IDE.

Is it possible to do so with std::cout only?

I found a post on stack which doesn't work with my need.

Answer 1

The mechanic you need to use here is ANSI escape sequences.

ANSI escape sequences are processed by (mostly) Unix terminals and terminal emulators for changing the terminal behavior, eg formatting or coloring text. More recently, hyperlinks may be embedded using an escape sequence as well. For example, the ls utility may embed file:// scheme links with the printed filenames and a terminal may allow to open a file by clicking on it. And GCC does this as well (see -fdiagnostics-urls option).

Several IDEs nowadays also support these links in their output panes. To form a link you need to print one escape sequence before the text and one after (to reset the link state), like so:

printf '\e]8;;http://example.com\e\\This is a link\e]8;;\e\\\n'

Note that \e is ESC, the other characters in the example are regular characters as printed. Find a good documentation about this, esp. about how to form appropriate file:// URIs here .

Answer 2

For Qt Creator to recognize a link to a source file in the Application Output, it needs to be in a specific format. In my tests I've found the following to work:

file:///home/user/project/src/foo.cpp:1234

This follows the pattern file://%{file}:%{line} .

Since this question is related to Qt, you may want to set the QT_MESSAGE_PATTERN environment variable such that the file and line number is automatically included in your debug messages. For example:

QT_MESSAGE_PATTERN="%{message} (file://%{file}:%{line})"

For more information, see:

• https://doc.qt.io/qt-5/qtglobal.html#qSetMessagePattern
• https://doc.qt.io/qt-5/debug.html#warning-and-debugging-messages