QFileDialog::getSaveFileName - would like to disable save button for read only folder

[Rajesh.Rathod]

Dear All,

I would like to disable file save dialog's save button if the current selected folder is read only folder, I mean I want read only folder indication the moment user selects folder on file save dialog.

Here is the code, I have written to show file save dialog...

// Show the SaveAs dialog
    QString sessionNameStr = QFileDialog::getSaveFileName(
        pParent, 
        ("Save Session File"), 
        primarySessionPath, 
        ("Sessions (*.sess)") );

// Show the SaveAs dialog
    QString sessionNameStr = QFileDialog::getSaveFileName(
        pParent, 
        ("Save Session File"), 
        primarySessionPath, 
        ("Sessions (*.sess)") );

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This problem is on Mac OS (El Capitan)
I am using Qt 4.7.3.

Please suggest me a solution, if any one has any idea about it.

Overriding QFileDialog or writing some other custom class is the last option I would like to choose.

Thanks,