Roard Vallon Tutorials# Contents 1 - Programming under GNUstep Application description Model-View-Controller Delegation Implementation Creating the graphic interfaces Connecting the View and the Controller The main function of our programme The Makefiles Archiving an object Modification of TodoController Modification of the gorm file Credits Links 2 - NSWindowController and Design Pattern MVC Notes on the user interface Some classes and widgets … Using NSWindowController NSUserDefaults: Managing preferences Access to defaults using the NSUserDefaults class Implementation for Todo.app The Observer Design Pattern Notifications Using notifications Conclusion