How do I create an absolute file path from a QDir and a relative file path?

Question

In my program I have a QDir representing the location of the executable using QCoreApplication::applicationDirPath() and a QString that represents a path to a file relative to the executable directory (using .. , etc.). How do I turn this information into an absolute file path to the same file?

Answer 1

You can use QFileInfo for that, use the constructor that takes a QDir and a QString, then call absoluteFilePath or canonicalFilePath depending on what you want exactly.

QDir dir;
// ...
QString file;
// ...
QFileInfo fi(dir, file);
QString canonical = fi.canonicalFilePath();