You can assign them events (like button events) for different things, like when they are destroyed, when windows are maximized, etc. In these functions you can also e.g. prevent a window from being maximized/closed etc.
That's what I meant with delegate based.
Does this also count for data setup? Eg you have a function that returns an array of Strings that should be used for this table view and say the tableview: Use this function as data source?
