Is there a tidier way to connect many Qt widgets of different types to the same slot?

Question

I am trying to make an options dialog that saves as much time as possible when applying the settings.

The widgets used are spread across 4 tabs and are a selection of gr

Answer 1

For editable controls, the value that is edited (checkbox status, list item index, etc.) is called the user property. It is possible to extract the notification signal of such property programmatically, and thus to connect it to a slot:

QMetaMethod slot = this->metaObject()->method(this->metaObject()->indexOfSlot("setModified()"));
QList<QWidget*> widgets;
foreach (QWidget * widget, widgets) {
  QMetaProperty prop = widget->metaObject()->userProperty();
  if (!prop.isValid() || !prop.hasNotifySignal())
    continue;
  connect(widget, prop.notifySignal(), this, slot);
}