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

public class demo03e extends Applet {
  ctrlPanel1 myPanel1 = new ctrlPanel1() ;
  ctrlPanel2 myPanel2 = new ctrlPanel2() ;
  Scrollbar scV = new Scrollbar(Scrollbar.VERTICAL,50,10,0,100+10) ;
  Scrollbar scH = new Scrollbar(Scrollbar.HORIZONTAL,50,10,0,100+10) ;
  myCanvas drawingCanvas = new myCanvas() ;
  
  public void init() {
    // 全体はBorderLayoutで配置
    setLayout(new BorderLayout()) ;
    add("North",  myPanel1) ;
    add("West",   myPanel2) ;
    add("East",   scV) ;
    add("South",  scH) ;
    add("Center", drawingCanvas) ;
  }

  // class内にもclassを作成可能
  class ctrlPanel1 extends Panel {
    public Button bt1, bt2, bt3 ;
    // このパネルはGridLayoutで横１行に配置
    public ctrlPanel1() {
      setLayout(new GridLayout(1,3)) ;
      bt1 = new Button("Button(1)") ;
      bt2 = new Button("Button(2)") ;
      bt3 = new Button("Button(3)") ;
      add(bt1) ; add(bt2) ; add(bt3) ;
    }
  }
  
  class ctrlPanel2 extends Panel {
    public Checkbox cb1, cb2, cb3 ;
    // このパネルはGridLayoutで縦１列に配置
    public ctrlPanel2() {
      setLayout(new GridLayout(3,1)) ;
      cb1 = new Checkbox("Check(1)") ;
      cb2 = new Checkbox("Check(2)") ;
      cb3 = new Checkbox("Check(3)") ;
      add(cb1) ; add(cb2) ; add(cb3) ;
    }
  }
  
  class myCanvas extends Canvas {
    public myCanvas() {
      setBackground(Color.black) ;
      setForeground(Color.white) ;
    }
    public void paint(Graphics g) {
      int w, h ;
      w = getSize().width ;
      h = getSize().height ;
      g.drawString("My Canvas",w/2-30,h/2) ;
    }
  }
}