Question

I am a Qt beginner and just got stuck with the problem. I am looking for a file SomePath/NewDirectoryA/NewFile.kml (NewFile.kml will be the only file in NewDirectoryA, having this directory just to maintain semantics in the project).

If SomePath/NewDirectoryA/NewFile.kml exists then I will use it in my code and if it doesn’t exist then I have to create it. If this File doesn’t exist then this directory also doesn’t exist in SomePath. So If only I have to create a file I can use QFile and open it in ReadWrite or WriteOnly mode.

But the problem is I have to create the file with the directory itself.
I tried with QFile with file name SomePath/NewDirectoryA/NewFile.kml but it didn’t worked.

Please suggest me a way in which I can create a new file (NewFile.kml) in a new directory (NewDirectorA) at a given location (SomePath).

Answer 1

bool QFile::open ( OpenMode mode ) [virtual]

[…]

Note: In WriteOnly or ReadWrite mode,
if the relevant file does not already
exist, this function will try to
create a new file before opening it.

Qt’s caveat for file creation

Platform Specific Issues

File permissions are handled differently on Unix-like systems and
Windows. In a non writable directory on Unix-like systems, files
cannot be created. This is not always the case on Windows, where, for
instance, the ‘My Documents’ directory usually is not writable, but it
is still possible to create files in it.

Directories are created with

bool
QDir::mkdir
( const QString & dirName ) const

Creates a sub-directory called
dirName.

and

bool QDir::mkpath
( const QString & dirPath ) const

Creates the directory path dirPath.

The function will create all parent
directories necessary to create the
directory.