The documentation in QCreator is good for the Qt framework.
Is it possible to similar documentation for the c++ standard library to integrate with QCreator?
It would be good to be able to just push F1 for documentation and browse a offline documentation.
I expect this to be possible, but have not found information about it.
It is possible but the docs have to be in QCH format.
Look here at Qt Help Book and download this file.
Then unzip the file and follow instructions from Qt Adding External Documentation