QDialog with qss-stylable subcontrols (title and close button)

[Elder Orb]

I need to create QDialog-based control with custom title and close button. Simple way is to add some methods for controlling title and close button, but I want to have a possibility to style subcontrols through qss ::title and ::close-button selectors, which are already defined for QDockWidget. I want to do something like the following:

MyDialog::title {
   subcontrol-origin:margin;
   subcontrol-position:left;
   color: white;
   .... etc.... 
}
 
MyDialog::close-button {
   subcontrol-origin:margin;
   subcontrol-position:right;
   image: url(./img.png);
   .... etc.... 
}

MyDialog::title {
   subcontrol-origin:margin;
   subcontrol-position:left;
   color: white;
   .... etc.... 
}

MyDialog::close-button {
   subcontrol-origin:margin;
   subcontrol-position:right;
   image: url(./img.png);
   .... etc.... 
}

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Is it possible at all ?