//GiGinew.java  --- @CopyLeft by tsaiwn@csie.nctu
// http://www.csie.nctu.edu.tw/~tsaiwn/course/java/...
import java.awt.*;
import java.awt.event.*;
public class GiGinew {
      Frame f = new Frame("Window 2005");
      Button b1,b2,b3;
      Panel p;       Button n, bq, big;
      int xSize=380, ySize=280;
      Dimension dim =
           Toolkit.getDefaultToolkit( ).getScreenSize();
           TextArea tx=   new TextArea("Hey 我愛 GiGi", 5,20,
              TextArea.SCROLLBARS_HORIZONTAL_ONLY);
   public static void main( String s[ ]) {
       new GiGinew( );  //can NOT use non-static var in main( )
   }
   public GiGinew( ) {  // Constructor
       f.setSize(xSize,ySize); f.setLocation(100,100);
       tx.append("\n=== ==== ====       TextArea tx=");
       tx.append(" new TextArea(\"Hey 我愛 GiGi\",  5,20,");
       tx.append(
            " TextArea.SCROLLBARS_HORIZONTAL_ONLY);\n");
         tx.append(
             "If  如果 GiGi 不漂亮, 你還會覺得她的歌好聽嗎?\n");
         b1=new Button("111");  b2=new Button("222");
         p = new Panel(); n= new Button("HahaHehehe");
         p.add(n);  // 把 n 這 Button 貼到 p 裡面
// more Buttons
      bq=new Button("Quit"); p.add(bq);
      bq.setCursor(new Cursor(Cursor.HAND_CURSOR) ); 
      b1.setCursor(new Cursor(Cursor.HAND_CURSOR) ); 
        bq.setBackground(new Color(38,38,38));
        bq.setForeground(Color.red);
             big=new Button("Bigger"); p.add(big);
             big.setForeground(new Color(255,0,0));
                n.setBackground(Color.green);
       Handler chang3 = new Handler( ); // 請一個外勞chang3
               n.addActionListener(chang3); //有事交給chang3
                                // 的actionPerformed()
               b1.addActionListener(chang3);  //b1 也要
               bq.addActionListener(chang3);
               big.addActionListener(chang3);
                f.add(tx,"Center");  //文字擺中間
                f.add(b1,"West"); ; f.add(b2,"East");
                f.add(p,BorderLayout.SOUTH);
               b2.addActionListener(chang3);
               f.addWindowListener(chang3); // see below
           Amigo lee4 = new Amigo( );  // 錢多再請個外勞
           b1.addMouseListener(lee4); // b1 上滑鼠事件交 lee4 處理
       f.setVisible(true);  //f.show();  和 f.hide();是舊的寫法
   }
//an inner class
class Handler extends WindowAdapter implements ActionListener{
    public void windowClosing(WindowEvent e){
         f.dispose( );   //System.exit(0);
    } 
    public void actionPerformed(ActionEvent evt){
          if(evt.getSource( ) == n){
	          n.setBackground(Color.red);
             n.setLabel(" 777 ");
          } /*  evt...  == n  */
          if(evt.getSource( ) == b1) n.setLabel("Eleven");
          if(evt.getSource( ) == bq) System.exit(0);
          if(evt.getSource( ) == b2) 
                     n.setBackground(new Color(88,234,38)); //RGB
          if(evt.getSource( ) == big) {   //increase window size
                xSize = (int) (xSize*1.2);
                if(xSize>dim.width) xSize= dim.width;
                ySize = (int) (ySize*1.2); 
                if(ySize>dim.height) ySize= dim.height;
                tx.append("\n"+xSize+ "," + ySize);
                f.setSize(xSize,ySize);   // resize the frame
         }
         f.validate( );  // so that Layout Manager do ...
    } /* actionPerformed */
} // Handler
// another inner class Amigo
class Amigo extends MouseAdapter {
    public void mouseEntered(MouseEvent e){
         tx.append("\nMouse entered .. " );
         Object who = e.getSource( );
         tx.append( who.getClass( ).toString( ));
         String msg; Class what = who.getClass( );
         if(what == (new Button()).getClass( ) ) //is Button
               msg = " "+((Button)who).getLabel( ); 
         else if(what == (new Frame()).getClass( ) ) //is Frame
                   msg = " "+((Frame)who).getTitle( );
         else msg = " "+((Component)who).getName( );
         tx.append(msg);
    }
    public void mouseExited(MouseEvent e){
    }
} // Amigo == means friend in spanish
}