import  java.awt.*;
 import  java.applet.Applet;
 public   class  MenuO  extends  Applet {
     public   void  init(){
         new  Menu_Frame();
    }
} // конец Menu1
// создаем новый экземпляр класса Menu_Frame
 class  Menu_Frame  extends  Frame {
     float  conversion_ratio =  1 .5f;
    TextField field1 =  new  TextField( 15 );
    TextArea field2 =  new  TextArea( 4 , 20 );
    TextField ratioField =  new  TextField( 5 );
    Scrollbar ratioScrollBar =  new  Scrollbar( Scrollbar.HORIZONTAL,  150 , 25 ,  50 ,  250  );
    Panel cards_panel;
     public  Menu_Frame() {
        setLayout( new  BorderLayout());
        MenuBar Bar =  new  MenuBar();
        Menu m =  new  Menu("Operation");
        m.add( new  MenuItem("Adjust Ratio"));
        m.add( new  MenuItem("Calculate"));
        Bar.add(m);
        setMenuBar(Bar);
        setFont( new  Font("Helvetica", Font.PLAIN,  12 ));
        setBackground(Color.white);
        ratioField.setEditable(false);
        field1.setEditable(true);
        field2.setEditable(false);
        ratioField.setText("1.50");
        field1.resize(field1.preferredSize());
        field2.resize(field2.preferredSize());
        ratioField.resize(ratioField.preferredSize());
        ratioScrollBar.resize(ratioScrollBar.preferredSize());
        cards_panel =  new  Panel();
        cards_panel.setLayout( new  CardLayout());
        Panel ratio_panel =  new  Panel();
        Panel calculate_panel =  new  Panel();
        ratio_panel.add(ratioField);
        ratio_panel.add(ratioScrollBar);
        calculate_panel.add(field1);
        calculate_panel.add(field2);
        cards_panel.add("Adjust Ratio", ratio_panel);
        cards_panel.add("Calculate", calculate_panel);
        add("Center", cards_panel);
        resize( 250 , 300 );
        pack();
        show();
    } // Menu_Frame
     public   void  convert() {
         float  currency1, currency2;
        String InputString = field1.getText();
        field1.setText("");
        currency1 =  Float .valueOf(InputString).floatValue();
        currency2 = conversion_ratio * currency1;
        String OutputString ="$" + InputString + " = " + "#" +
         Float .toString(currency2) + "\n";
        field2.appendText(OutputString);
    } //convert
     public   boolean  handleEvent(Event evt) {
         if  (evt.target == ratioScrollBar) {
             int  in;
            in = ratioScrollBar.getValue();
            conversion_ratio = in/100f;
            ratioField.setText( Float .toString(conversion_ratio));
        }
         if  (evt.target == field1) {
             char  c=( char )evt.key;
             if  (c == '\n'){
                convert();
                 return  true;
            }  else  { 
                 return  false; 
            }
        }
         if  ((evt.id == Event.ACTION_EVENT) && (evt.target==m) ) {
            ((CardLayout)cards_panel.getLayout()).show(cards_panel,(String)evt.arg);
             return  true;
        }
         if  (evt.id == Event.WINDOW_DESTROY) {
            dispose();
             return  true;
        }
         return  false;
    }
}