How to specify the QFileDialog::getExistingDirectory() method?

Question

With the method/command:

OpenCreateDirectory() 
{  
    QString Directory = QFileDialog::getExistingDirectory(this,
                        tr("Choose Or Create Directory"),
                        "/home",
                        QFileDialog::DontResolveSymlinks);
}

I can create a new directory or choose an existing one. Is there a way to disable the possibility to create a new directory? Also, is there a way to disable the possibility to choose an existing directory?

To be more precise: When I use the method above, a window pops up in which I can create a new directory OR open an existing directory. What I want to do is to limit the method, so that I just can create a new directory without being able to just open an existing directory OR in the other case limit the method, so that I just can open an existing directory without being able to create a new directory.

Answer 1

You can prevent the creation of a new directory by using these options:

QFileDialog::DontUseNativeDialog | QFileDialog::ReadOnly 
| QFileDialog::ShowDirsOnly

The options ReadOnly doesn't have any effect if you use native dialogs, at least on Windows.

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And for disabling the choice of an already existing directory, you can't.
But you could either add the name of the directory to be created as a separate option, or check that the chosen directory is not empty.