GUI ApplicationsJCheckBox

Contents

A. Problem: An Order Calculator for the Brandi’s Bagel House

B. Solution

C. Exercise: Implementing a Separate Model

A. Problem: An Order Calculator for the Brandi’s Bagel House

• Brandi’s Bagel House has a bagel and coffee delivery service for the businesses in her neighborhood

• Customers may call in and order white and whole wheat bagels with a variety of toppings

• In addition, customers may order three different types of coffee (Delivery for coffee alone is not available, however)

• Here is a complete price list– Bagels

• White bagel $1.25• Whole wheat bagel $1.50

– Toppings• Cream cheese $0.50• Butter $0.25• Peach jelly $0.75• Blueberry jam $0.75

– Coffee• Regular coffee $1.25• Decaf coffee $1.25• Cappuccino @2.00

• Brandi, the owner, needs an “order calculator” application that her staff can use to calculate the price of an order as it is called in

• The application should display the subtotal, the amount of a 6% sales tax, and the total of the order

B. Solution

1. Developing the View

2. Implementing Event Handlers3.1. Implementing an event handler for the Exit

button

3.2. Implementing an event handler for the Calculate button

2. Developing the View

• Project name: OrderCalculator• Class name: OrderCalculatorView• Package: ordercalculator• Frame title: Order Calculator

• The Title Label• The Food and Drink Panel

– The Bagel Panel• 1 Button Group

– The White Radio Button– The Whole wheat Radio Button

– The Toppings Panel• 4 Check Boxes

– The Coffee Panel• 1 Button Group

– 4 Radio Buttons

• The Button Panel– 2 Buttons

3.1. Implementing an event handler for the Exit button

• This is an exercise for you

3.2. Implementing an event handler for the Calculate button

3.2.1. Declaring the priceList map and implementing initPriceList()

3.2.2. Implementing getSubtotal()

3.2.3. Implementing the event handler

3.2.1. Declaring the priceList map and implementing initPriceList()

3.2.2. Implementing getSubtotal()

3.2.3. Implementing the event handler

Exercise

• Modify the application so that it has a separate Model class

Solution

1. The Design

2. The View & Controller

3. The Model

4. The Data Transfer Object

1. The Design

Bill- double subtotal- double tax- double total

<<Data Transfer Object>>

OrderCalculatorView- OrderCalculator

<<View & Controller>>

OrderCalculator<<Model>>

1

uses uses

1

2. The View & Controller

3. The Model

4. The Data Transfer Object

References

1. GUI Building in NetBeans IDE 5.5. http://testwww.netbeans.org/kb/55/quickstart-gui.html

2. Starting Out With Java 5 from control structures to objects. Tony Gaddis