Widgets wich depended from user permissions

Hi everybody.
My question is this :
I am currently developing a program on qt 4.7.3
I want that a part of my widgets would be dependent from user permissions.
For example,I want make, invisible a widget (if any user not have the desired permissions)
Is it possible to do so, even at the stage of development, for example by definition any property?

I dont want to write in my application a following code:
QWidget * myWidget = ....
...
myWidget->setVisible(permissions == Admin || permissions == Manager);

You could do something like this (not compilable!, just to get the idea):

Code:

---

PermissionManager* manager = getPermissionManager();
 
foreach(widget, all-widgets-that-should-depend-on-permissions) {
   manager->registerWidget(widget, Permission::Admin | Permission::Manager);
}
 
// later
 
void onPermissionChange(Permission::Type permission) {
  PermissionManager* manager = getPermissionManager();
  manager->setUserPermission(permission)
}
 
// implementation could be like this
 
PermissionManager::setUserPermission(Permission::Type permission) {
 
  foreach(widget, widget-list) {
    Permissions permissions = getPermissionsForWidget(widget);
    widget->setVisible(permissions is valid permission));
  }
}

---

You could also install a EventHandler an watch for the visible/enable events and control the permissions there. This would also catch if a widget is made visible directly. Interesting for implementation could be

1. QFlags
2. QObject::installEventHandler

Thank you very much nightghost
But I really thought that there is already something similar in Qt.
Probably I going to use your idea
Thanks!!!!!!!!!!!