COS3711 Assignment 2 due date 18 July 2025

COS3711
ASSIGNMENT 2 2025

UNIQUE NO.
DUE DATE: 18 JULY 2025

,Advanced Programming

1. Store Application Structure
Classes to Design
A. Customer
class Customer {
QString name;
QList<Transaction*> transactions;
};
B. Item
enum class ItemType { Book, Magazine };

class Item {
QString name;
ItemType type;
};
C. Transaction
class Transaction {
QDateTime dateTime;
QList<Item*> items;
QList<int> quantities; // matching index
};
D. Store
class Store {
QList<Customer*> customers;
QList<Item*> items;
QList<Item*> itemBackup;

void backupItems();
void restoreItems();
};


�GUI Features (MainWindow)

 Menus:
o File → Exit
o Customer → Add Customer
o Item → Add Item, Restore Items
o Transactions → New Transaction
o Broadcast → Send Transactions
 Toolbar:
o Quick buttons for the actions above
 Status Bar:

, o Feedback on operations (e.g., "Item added", "Transaction recorded")
 Tree View:
o QTreeView to display customers and their transactions using a
QStandardItemModel.
 Input Dialogs:
o QInputDialog for customer and item names
o QComboBox, QSpinBox in a QDialog for transactions




💾 Memory & GUI Management


 Manually create widgets using parent-child structure
 Use delete or smart pointers to manage memory (especially transactions/items)
 Use setFocus(), setTabOrder(), and manage widget states (enable/disable)
 Provide feedback via QMessageBox and status bar




2. UDP Broadcasting

 Create a QThread subclass for broadcasting
 Format all transactions as XML (QDomDocument)
 Use QUdpSocket to broadcast on a known port
 Example XML:

<store>
<customer name="John Doe">
<transaction date="2025-07-01T12:34">
<item name="Intro to Qt" type="Book" quantity="1"/>
</transaction>
</customer>
</store>



3. 📥 UDP Receiver Application

 Simple Qt GUI with a QTextEdit
 Use QUdpSocket to listen on the same port