Hi i am planning to design a cloud storage service using design patterns and uml I identified following use cases user signup user sign in manage folders like update delete edit share etc upgrade account sync data manage profile etc i identified following classes User class account class profile class drive class etc so now to extend further i want to know what all design patterns like factory pattern , observer pattern , decorator pattern can be used in designing this google drive. can anybody help me in sending a class diagram for cloud drive Thanks karth

HI all I want to design a ui widget library , which any iDE developer can use and develop GUI applications. let say library has application widgets include menu bars, tool bars. at starting point what are functional and non functional requirements should i consider use cases for UI widget design Thanks for help

HI all I want to design a ui widget library , which any iDE developer can use and develop GUI applications. let say library has application widgets include menu bars, tool bars. at starting point what are functional and non functional requirements should i consider use cases for UI widget design Thanks for help