QtQuick Dialog with Yes / No / Cancel buttons

I thought that this should have been a super common use case:

import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Controls.Universal 2.15
import QtQuick.Dialogs

Dialog {
    id: rootItem
    title: qsTr("Save unsaved changes?")
    standardButtons: Dialog.Yes | Dialog.No | Dialog.Cancel
    modal: true
    Component.onCompleted: {
        visible = false;
    }
    onAccepted: {
        // Unsaved changes accepted
    }
    onRejected: {
        // Unsaved changes rejected
    }
}

How can I make a difference between user clicking on No and Cancel ? The documentation seems to be very poor on this. Yes means "accepted" and both No and Cancel means "rejected". In my application's state machine I want to know how the user rejected.

https://doc.qt.io/qt-6/qml-qtquick-controls-dialog.html

Dialog.No   A "No" button defined with the NoRole. 

What NoRole ? What should I do with this undocumented NoRole ?

I feel stupid.

We use a custom DialogButtonBox as footer in our dialogs to handle this. By adding the buttons by hand you have full control about what is happening:

Dialog {
    id: customDialog
    title: qsTr("Save unsaved changes?")

    footer: DialogButtonBox {
        Button {
            text: qsTr("Yes")
            DialogButtonBox.buttonRole: DialogButtonBox.AcceptRole

            onClicked: console.log("Yes clicked");
        }

        Button {
            text: qsTr("No")
            DialogButtonBox.buttonRole: DialogButtonBox.RejectRole

            onClicked: console.log("No clicked");
        }

        Button {
            text: qsTr("Cancel")
            DialogButtonBox.buttonRole: DialogButtonBox.RejectRole

            onClicked: console.log("Cancel clicked");
        }
    }
}