CSCE 155
Homework
Assignment 4:
GUI
Design in OO Fashion --- A Grocery Store
Assigned:
Due: Start of Class,
Note: This assignment is to be
completed individually - collaboration is strictly prohibited.
Points: 100 points
Problem Description
In this assignment, you are required to design a GUI application using multiple classes. You will implement a simple Grocery Store. The interface for this assignment should allow the user to enter a customer’s name and his or her purchases in the store. For example, your program should record such information:
customer “Kim” purchases
1 unit of milk and 2 units of bagels
on
2 units of bread and 3 units of eggs
on
…
Your program needs to display the history of a customer’s purchases and compute the monthly total purchase amount.
You should design the system in an object-oriented fashion using multiple classes, each with well-defined functionalities that interact with the others to accomplish the requirements. The GUI application should perform the following tasks:
- Prompt a welcome interface and let user choose to either take a look at the purchase history or to input a new purchase for a customer, as in Figure 1.
Figure 1
- If the user chooses “new purchase”, prompt the interface of “shopping cart”, as shown in Figure 2. Let the user input the customer’s name, date, and use a JComboBox to let user choose the items to purchase (the items are read in from a file in the system, to be discussed later) and the number of units of each item that the customer wants to purchase. Capture all the information and store them. The user can purchase multiple items by clicking the “Buy next item” button.
Figure 2
- If the user clicks the “Checkout” button, then complete the current purchase and prompt a dialog or message box to show the bill, as shown in Figure 3.
Figure 3
- If the user clicks the “purchase history” button, prompt an interface as shown in Figure 4. User can either (1) choose to take a look at a customer’s purchase history for a designated day by inputting the date of the purchase, or (2) choose to compute the total monthly purchase by inputting the month. The results are displayed using a dialog or message box (not shown).
Figure 4
The system should contain five classes:
1. GroceryStore: This
class stores the merchandises and customers information. It includes an array (or
a vector) of merchandises and an array (or a vector) of customers. This class starts your application by
displaying the welcome window to the user, and initializes all other classes. Consider that the store has an unlimited
supply of all its merchandises. This is
a GUI application class.
2. Merchandise:
This class has an item’s name, its unit price.
3. Customer: This class has a customer’s name, an array of Purchase objects.
4. Purchase: This class has a purchase’s date, an array of Merchandise objects (as purchased items) and an array of integers, each integer recording the number of units purchased for a particular merchandise.
5. PurchaseReport: This class display the history of the
purchase a custom made or compute the monthly total purchase. This is a GUI application class.
In
implementing GroceryStore class, the application should read the
information of the merchandises from a file, called “MerchandiseInfo.txt”, which is in the following format:
Milk 3.34
Bagel
1.99
Bread
0.99
Icecream 2.50
Eggs 1.10
You
can create your own item list, but remember to include at least 5 items. You may assume that our test input file only
has 1000 items.
Supplied Solution Components
None.