/**
* This method contains the definition for the 'update' method of the observer interface. This
* method updates the Food Stock panel in the user interface window.
*/
public void update(Observable observable, Object obj) {
VendingMachine machine = (VendingMachine) observable;
itemList = (Hashtable) obj;
Enumeration e = itemList.elements();
for (int i = 0; e.hasMoreElements(); i++) { // Display the updates in the available Food Stocks
VendingMachine.FoodStock stock = (VendingMachine.FoodStock) e.nextElement();
FoodItem item = stock.item;
itemLabelArray[i].setText(item.getDescription());
Integer code = item.getItemCode();
String str = code.toString();
codeLabelArray[i].setText("Item Code: " + str);
Double price = item.getPrice();
String str1 = price.toString();
priceLabelArray[i].setText("Price: " + str1);
Integer quant = machine.GetQuantity(code);
String str2 = quant.toString();
quantityLabelArray[i].setText("Quantity: " + str2);
}
}
/** @param parentUI an instance of MainUI class */
public ConsumerUI(MainUI parentUI) {
super("SmartCal Vending Machine - Consumer Operations");
super.setLocation(200, 10);
this.parentUI = parentUI;
VendingMachine machine = parentUI.getVendingMachine(); // Get an instance of Vending Machine
machine.addObserver(
this); // Register ConsumerUI as an observer to receive VendingMachine updates
Container container1 = getContentPane();
container1.setLayout(new BoxLayout(container1, BoxLayout.Y_AXIS));
// itemPanel = Food Stock Panel
itemPanel = new JPanel(new GridLayout(0, 4));
itemPanel.setBorder(BorderFactory.createTitledBorder("Food Stock"));
itemLabelArray = (JLabel[]) Array.newInstance(JLabel.class, 15);
codeLabelArray = (JLabel[]) Array.newInstance(JLabel.class, 15);
priceLabelArray = (JLabel[]) Array.newInstance(JLabel.class, 15);
quantityLabelArray = (JLabel[]) Array.newInstance(JLabel.class, 15);
for (int i = 0; i < 15; i++) { // Maximum No. of Food Item Slots is 15
itemLabelArray[i] = new JLabel();
codeLabelArray[i] = new JLabel();
priceLabelArray[i] = new JLabel();
quantityLabelArray[i] = new JLabel();
itemPanel.add(itemLabelArray[i]);
itemPanel.add(codeLabelArray[i]);
itemPanel.add(priceLabelArray[i]);
itemPanel.add(quantityLabelArray[i]);
}
itemList = machine.getFoodStocks(); // Get the list of Food Items from the Vending Machine &
Enumeration e = itemList.elements(); // Store it in the Enumeration
for (int i = 0;
e.hasMoreElements();
i++) { // Store the Items from Enumeration to the ConsumerUI Variables
VendingMachine.FoodStock stock = (VendingMachine.FoodStock) e.nextElement();
FoodItem item = stock.item;
itemLabelArray[i].setText(item.getDescription());
Integer code = item.getItemCode();
String str = code.toString();
codeLabelArray[i].setText("Item Code: " + str);
Double price = item.getPrice();
String str1 = price.toString();
priceLabelArray[i].setText("Price: " + str1);
Integer quant = machine.GetQuantity(code);
String str2 = quant.toString();
quantityLabelArray[i].setText("Quantity: " + str2);
}
container1.add(itemPanel);
// displayPanel
displayPanel = new JPanel(new FlowLayout());
displayLabel = new JLabel(display);
displayPanel.add(displayLabel);
displayPanel.setBorder(BorderFactory.createTitledBorder("Display Screen"));
container1.add(displayPanel);
// actionPanel1 = Consumer Operations Panel
actionPanel1 = new JPanel(new GridLayout(0, 1));
actionPanel1.setBorder(BorderFactory.createTitledBorder("Consumer Operations"));
// actionPanel1 = subPanel1 + subPanel2 + subPanel3
// subPanel1
subPanel1 = new JPanel(new FlowLayout());
buyItem = new JRadioButton("Buy a Food Item");
acceptLabel = new JLabel(accept);
codeText = new JTextField(10);
subPanel1.add(buyItem);
subPanel1.add(acceptLabel);
subPanel1.add(codeText);
actionPanel1.add(subPanel1);
// subPanel2
subPanel2 = new JPanel(new FlowLayout());
displayNutri = new JRadioButton("Display Nutritional Info");
acceptLabel1 = new JLabel(accept);
codeText1 = new JTextField(10);
ok3 = new JButton("Display"); // for enter itemCode
subPanel2.add(displayNutri);
subPanel2.add(acceptLabel1);
subPanel2.add(codeText1);
subPanel2.add(ok3);
actionPanel1.add(subPanel2);
// subPanel3
subPanel3 = new JPanel(new FlowLayout());
querySuggest = new JRadioButton("Query Suggestion of Food Items");
calorieLabel = new JLabel("Maximum Calorie Limit");
calorieText = new JTextField(10);
ok4 = new JButton("Display");
subPanel3.add(querySuggest);
subPanel3.add(calorieLabel);
subPanel3.add(calorieText);
subPanel3.add(ok4);
actionPanel1.add(subPanel3);
container1.add(actionPanel1);
// actionPanel2 - H/W Slots = actionPanel2 + dispatchPanel
actionPanel2 = new JPanel(new FlowLayout());
actionPanel2.setBorder(BorderFactory.createTitledBorder("Hardware Slots"));
enterLabel = new JLabel(enterAmount);
amountText = new JTextField(10);
buy = new JButton("BUY");
cancel = new JButton("Cancel");
changeLabel = new JLabel(change);
changeText = new JTextField(10);
ok1 = new JButton("Collect Change");
actionPanel2.add(enterLabel);
actionPanel2.add(amountText);
actionPanel2.add(buy);
actionPanel2.add(cancel);
actionPanel2.add(changeLabel);
actionPanel2.add(changeText);
actionPanel2.add(ok1);
// Dispatch Panel
dispatchPanel = new JPanel(new FlowLayout());
dispatcherLabel = new JLabel(dispatcher);
ok2 = new JButton("Collect Item");
dispatchPanel.add(dispatcherLabel);
dispatchPanel.add(ok2);
actionPanel2.add(dispatchPanel);
container1.add(actionPanel2);
// Exit Panel
exitPanel = new JPanel(new FlowLayout());
exit = new JButton("Back to Main Menu");
exitPanel.add(exit);
container1.add(exitPanel);
// Registering the components to the Event Handlers
// Register Buy button to Event Handler
BuyHandler BHandler = new BuyHandler();
buy.addActionListener(BHandler);
// Register button of cancel to Event Handler
CancelHandler CHandler = new CancelHandler();
cancel.addActionListener(CHandler);
// Register RadioButton of 'Buy Item' to Event Handler
BuyRadioHandler BRHandler = new BuyRadioHandler();
buyItem.addActionListener(BRHandler);
// Register RadioButton of 'Display Nutritional Info' to Event Handler
NutriRadioHandler NutriHandler = new NutriRadioHandler();
displayNutri.addActionListener(NutriHandler);
// Register RadioButton of 'Query Suggestion' to Event Handler
QueryRadioHandler QueryHandler = new QueryRadioHandler();
querySuggest.addActionListener(QueryHandler);
// Register Button for 'Display Nutritional Info' to Event Handler
DisplayNutriHandler DNHandler = new DisplayNutriHandler();
ok3.addActionListener(DNHandler);
// Register Button for 'Query Suggestion' to Event Handler
DisplayNutriHandler DNHandler1 = new DisplayNutriHandler();
ok4.addActionListener(DNHandler1);
// Register Button for 'Back to Main Menu' to Event Handler
MainMenuHandler1 MMHandler1 = new MainMenuHandler1();
exit.addActionListener(MMHandler1);
// Register Button for 'Collect Change' to Event Handler
CollectChangeHandler CCHandler = new CollectChangeHandler();
ok1.addActionListener(CCHandler);
// Register Button for 'Collect Food Item' to Event Handler
CollectItemHandler CIHandler = new CollectItemHandler();
ok2.addActionListener(CIHandler);
}
public void actionPerformed(ActionEvent event) {
if (displayNutri.isSelected()
&& codeText.getText() != null) { // for Display Nutritional Info Button
try {
intValue2 = Integer.valueOf(codeText1.getText()); // Get the text value of Item Code
} catch (NumberFormatException e) {
display = "Enter Correct Item Code"; // Display Error Message for Wrong Input
displayLabel.setForeground(Color.magenta);
displayLabel.setText(display);
codeText1.setText(null);
return;
}
FoodItem item =
DisplayNutritionalInfo(intValue2); // Call to the Method to Display Nutritional Info
if (item != null) {
calories =
item.GetCalories(); // Get the nutrional Info of the Item Code from the FoodItem
sugar = item.GetSugarContents();
fats = item.GetFatContents();
display =
"Calorific Value = "
+ calories
+ " Sugar Contents = "
+ sugar
+ "gms"
+ " Fat Contents = "
+ fats
+ "gms";
displayLabel.setForeground(Color.magenta);
displayLabel.setText(display);
} else {
display = "Enter Correct item Code"; // Display Error Message for Wrong Input
displayLabel.setForeground(Color.magenta);
displayLabel.setText(display);
codeText.setText(null);
}
}
if (querySuggest.isSelected()
&& calorieText.getText() != null) { // for Display Query Suggestion Button
try {
intValue2 =
Integer.valueOf(calorieText.getText()); // Get the text value of Maximum Calorie Limit
} catch (NumberFormatException e) {
display = "Enter Correct Calorie Limit"; // Display Error Message for Wrong Input
displayLabel.setForeground(Color.magenta);
displayLabel.setText(display);
calorieText.setText(null);
return;
}
if (intValue2 < 0) {
display =
"Enter Correct Calorie Limit"; // Display Error Message for Wrong (negative) Input
displayLabel.setForeground(Color.magenta);
displayLabel.setText(display);
calorieText.setText(null);
} else {
Hashtable itemList = DisplaySuggestion();
Enumeration e = itemList.elements();
String finalStr = "";
for (int i = 0;
e.hasMoreElements();
i++) { // Get the list of Food items below the entered Calorie Limit
VendingMachine.FoodStock stock = (VendingMachine.FoodStock) e.nextElement();
FoodItem item = stock.item;
if (item.GetCalories() <= intValue2) {
flag = 1;
if (!finalStr.equals("")) {
finalStr = finalStr + " , " + item.getDescription();
} else {
finalStr = item.getDescription();
}
}
}
if (flag == 1) {
display = finalStr; // Display the list of Food items below the entered Calorie Limit
displayLabel.setForeground(Color.magenta);
displayLabel.setText(display);
flag = 0;
} else {
display =
"No items in the Machine below Calorie Limit "
+ intValue2; // No Items below the entered Calorie Limit
displayLabel.setForeground(Color.magenta);
displayLabel.setText(display);
}
}
}
}