import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.text.*;

public class GUI extends Applet {

          private Label title = new Label("Iyad's Cash Register", 
                                           Label.CENTER);
	  private Label amount = new Label("Enter Amount: ");
	  private TextField Payamount = new TextField(5);
          private TextArea log = new TextArea(5, 20);

	  private Button TaxableButton = new Button("taxable");
          private Button NonTaxableButton = new Button("nontaxable");
          private Button CouponButton = new Button("coupon");
          private Button TotalButton = new Button("total");
          private Button TaxrateButton = new Button("taxrate");
          private Button AmountButton = new Button("amount");
          private Button ClearButton = new Button("clear");

          private Panel NPanel = new Panel();
          private Panel CPanel = new Panel();
          private Panel SPanel = new Panel();

	  private GUI_Listener listener  = new GUI_Listener (this);
          private Cash_Register register = new Cash_Register();

	  private DecimalFormat df = new DecimalFormat("$0.00");

public void init() {

   Payamount.addActionListener (listener);
   log.setEditable (false);

   NPanel.setLayout (new GridLayout(3, 1));
   NPanel.add(title);
   NPanel.add(amount);
   NPanel.add(Payamount);

   CPanel.setLayout (new GridLayout(3, 3));
   CPanel.add(TaxableButton);
   CPanel.add(NonTaxableButton);
   CPanel.add(CouponButton);
   CPanel.add(TotalButton);
   CPanel.add(TaxrateButton);
   CPanel.add(AmountButton);

   SPanel.setLayout (new GridLayout(3, 3));
   SPanel.add(log);
   SPanel.add(ClearButton);

   setLayout(new BorderLayout());   
   add(NPanel, "North");
   add(CPanel, "Center");  
   add(SPanel, "South");

   TaxableButton.addActionListener (listener);
   NonTaxableButton.addActionListener (listener);
   CouponButton.addActionListener (listener);
   TotalButton.addActionListener (listener);
   TaxrateButton.addActionListener (listener);
   AmountButton.addActionListener (listener);
   ClearButton.addActionListener (listener);
   
  }

public void addTaxable() {
   String a = Payamount.getText();
   double x = GUIRead.StringToDouble(a);
   register.add_taxable(x);
   log.append ( x + "$ taxable amount entered." + "\n");
}

public void addNonTaxable()  {
   String a = Payamount.getText();
   double x = GUIRead.StringToDouble(a);
   register.add_non_taxable(x);
   log.append ( x + "$  nontaxable amountentered." + "\n");
}

public void Coupon() {
   String a = Payamount.getText();
   double x = GUIRead.StringToDouble(a);
   register.add_coupon(x);
   log.append ( x + "$ coupon amount entered." + "\n");
}

public void Total() {
   double x = register.amount();
   log.append ( "Total is : " + df.format(x) + "\n");
}

public void Taxrate() {
   String a = Payamount.getText();
   double x = GUIRead.StringToDouble(a);
   register.set_tax(x);
   log.append ( x + "% taxrate amount entered." + "\n");
}

public void Amount() {
   String a = Payamount.getText();
   double amountpay = GUIRead.StringToDouble(a);
   double needed = register.amount();
   double change = register.chang(amountpay);

   amountpay = Math.round(amountpay*100)/100.00;
   change = Math.round(change*100)/100.00;

   DecimalFormat Dec = new DecimalFormat("$0.00");

   if (change < 0) 
     log.append ( "Sorry you are short of money." +  "\n");
   else 
     log.append ("Thank you, Your change is: " + Dec.format(change) + "\n");

}

public void Clear(){
   register.clear();
   log.append("New Sale, registered cleared..." + "\n");
}


}//class GUI