 when viewing observers is Qtilities::CoreGui::ObserverWidget. The observer widget is able to show the contents as a tree widget or as a table widget and the user can specify the view which is required as a parameter in the constructor, or change the view at runtime. Observers provide hints to item views which specify how the context must be shown, what actions can be performed on the items in the context, what the access mode of the observer is etc. 

This article will show how to use the observer widget c