COS3711 Assignment 2 solution 2025

COS3711/Assignment 3/2023 1 Assignment Tutorial Letter 2023 Advanced Programming COS3711 Year module Computer Science Department Assignment 3 Question BARCODE COS3711/Assignment 3/2023 2 Assignment 3 1. Introduction Please read this whole assignment tutorial letter before starting to ensure that you know what is expected of you and you do not get surprised by some requirement later in the development process. Use CMake to set up the projects and use QMainWindow instances for the user interfaces so that you can implement the functionality provided by a QMainWindow (such as menus, a toolbar, and a status bar) to meet the requirements of the scenario given below. Please note that you must not use Qt Designer, and you are expected to manually set up GUIs to ensure that you properly handle memory using Qt’s parent-child functionality. Marks will also be awarded for following good programming practice. • Follow standard naming conventions: class names start with a capital letter, variable and function names start with a lowercase letter, using camelCase for names made up of multiple words. • Ensure consistent code layout and use of blank lines. • Use forward class declarations in header files. • Use initialiser lists in constructors. • Have proper GUI management: setting cursor focus, sequential tabbing, clearing input widgets (like text input fields being cleared and spin boxes being returned to some default value), and enabling and disabling buttons/menu items as appropriate. • Provide appropriate user feedback. • Your code should build and run without any warnings. Consider the following scenario and then design a solution to meet the requirements listed. 2. Scenario Implement an application that tracks items bought from a store. Screenshots of possible interfaces have been provided as guidance below. Store application The store keeps a list of customers so that when something is purchased from the store, it is recorded against that customer’s name. Only the customer’s name is required. Only two items are currently sold in the store currently – books and magazines, and only the name of the item is required. Clearly, a list of such items is needed, and the user should be able to add items to the list. When an item is added, the application should automatically make a backup in COS3711/Assignment 3/2023 3 memory in case something goes wrong when the application is being used. Provision should thus be made to restore this list when necessary. Clearly, for the sake of data integrity, you do not want the user to create multiple copies of these lists. When a customer purchases items, a transaction is recorded. The date/time of the purchase is noted, as is the name, type, and quantity of each item purchased as part of the transaction. Use an appropriate widget to indicate which items have already been added as part of this transaction. All transactions should be displayed on the main GUI. A tree model (and appropriate view) should be used so that a user can see a customer’s transactions grouped together. COS3711/Assignment 3/2023 4 The user should be able to broadcast (using UDP) the contents of the model in XML format. This task should be run as a thread in the main application. The required XML format can be seen in the image in the next section. UDP receiver application Create a separate application that simply listens for the broadcast message and displays the received data (in XML format) on the GUI. 3. Requirements The following general requirements should be noted. • Follow good OOP design principles. • You should use menus in your application. • Pointers should be used for all instances of objects, and memory should be properly managed. • Appropriate design patterns should be used where sensible. 4. Extras Bonus marks will be awarded for the following. • The data members required for the classes are very basic and can be extended (like adding a price for each item and tracking the number of items available). COS3711/Assignment 3/2023 5 • Using QMainWindow functionality: o Splash screen o Application icon o Toolbar o About and Help 5. Submission Please check the How to submit the assessments page in the Module orientation lesson on myUnisa before submitting this assignment for information about how to submit the assignment. • Use CMake when setting up your assignment. • Submit only the project folders. • You should not submit the build-desktop folders. • Zip the two folders (for the two parts of the project) into one zipped file for submission. © Unisa 2023