/** ~mohammad/public_html/classes/csc241/Tank/tankApplet.java
**/


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

public class tankApplet extends Applet  implements ActionListener{
   displayTank t;
   Button incByHundred_;
   Button decByHundred_;
   TextField textField_;
   public tankApplet() { 
     t = new displayTank(80,200);
     incByHundred_ = new Button("+100");
     decByHundred_ = new Button("-100");
     incByHundred_.addActionListener(this);
     decByHundred_.addActionListener(this);
     
     textField_ = new TextField(30);
     textField_.setText("Tank is Empty!");
   }
   public void init() {
     setLayout( new BorderLayout() );
     Panel p = new Panel();
     p.setLayout(new FlowLayout());
     p.add(incByHundred_);
     p.add(decByHundred_);
     p.setSize(400,100);
     add("South", textField_);
     add("North", p);
   }

   public void paint (Graphics g) {
         t.display(g);
   }
      
     public void actionPerformed(ActionEvent event) {
       try{
         if ((event.getSource() == incByHundred_)) {
           if((t.content()+100) == t.capacity) {
             textField_.setText("Tank is Full!");
             t.add(100);
           }
           else if ((t.content()+100) > t.capacity)
             textField_.setText("Tank Overflow Error!");
           else {
             t.add(100);
             textField_.setText("Tank is " + 
                                (int) (t.content() / t.capacity*100) + 
                                "% Full");
           }
         }
         else {
           if( (t.content()-100) == 0 ) {
             textField_.setText("Tank is Empty!");
             t.remove(100);
           }
           else if( (t.content()-100) < 0 )
             textField_.setText("Tank Underflow Error!");
           else {
             t.remove(100);
             textField_.setText("Tank is " + 
                                (int)(t.content() / t.capacity*100.0) + 
                                "% Full");
           }
         }
         repaint();
       }
       catch (Exception e) {}
     }
}