selfcontainedpaneltest.java

经典的<<C how to program>一书第三版的例程。非常适合于C的初学者。

// Fig. 29.21: SelfContainedPanelTest.java
// Creating a self-contained subclass of JPanel 
// that processes its own mouse events.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.deitel.chtp3.ch29.SelfContainedPanel;

public class SelfContainedPanelTest extends JFrame {
   private SelfContainedPanel myPanel;

   public SelfContainedPanelTest()
   {
      myPanel = new SelfContainedPanel();   
      myPanel.setBackground( Color.yellow );

      Container c = getContentPane();
      c.setLayout( new FlowLayout() );
      c.add( myPanel );

      addMouseMotionListener(
         new MouseMotionListener() {
            public void mouseDragged( MouseEvent e )
            {
               setTitle( "Dragging: x=" + e.getX() +
                         "; y=" + e.getY() );
            }

            public void mouseMoved( MouseEvent e )
            {
               setTitle( "Moving: x=" + e.getX() +
                         "; y=" + e.getY() );
            }
         }
      );

      setSize( 300, 200 );
      show();
   }

   public static void main( String args[] )
   {
      SelfContainedPanelTest app =
         new SelfContainedPanelTest();

      app.addWindowListener(
         new WindowAdapter() {
            public void windowClosing( WindowEvent e )
            {
               System.exit( 0 );
            }
         }
      );
   }
}

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