ProgressIndicater (like some other controls) appear to have the default GetData / SetData interface beeing missing.. is this by design? it would ease things on common handling in a Ctrl based factory lot.. by not needing to sace extra info, just invoke GetDa
ta/SetData known interface..
ProgressIndicator is kind of static value - user cannot change it. So far the policy was that only widgets that are editable have Value.
The reason is that if you want to store all user supplied values in the dialog, you can simply go through all widgets and store the value if it is not Value::Void - that indicates that the widget does not have associated value.