Java How to Program Fourth Edition - DCC

764 Graphical User Interface Components: Part 2 Chapter 13
54 // attach internal frame to desktop and show it
55 theDesktop.add( frame );
56 frame.setVisible( true );
57 }
58
59 } // end anonymous inner class
60
61 ); // end call to addActionListener
62
63 setSize( 600, 440 );
64 setVisible( true );
65
66 } // end constructor
67
68 // execute application
69 public static void main( String args[] )
70 {
71 DesktopTest application = new DesktopTest();
72
73 application.setDefaultCloseOperation(
74 JFrame.EXIT_ON_CLOSE );
75 }
76
77 } // end class DesktopTest
78
79 // class to display an ImageIcon on a panel
80 class MyJPanel extends JPanel {
81 private ImageIcon imageIcon;
82
83 // load image
84 public MyJPanel()
85 {
86 imageIcon = new ImageIcon( "jhtp4.png" );
87 }
88
89 // display imageIcon on panel
90 public void paintComponent( Graphics g )
91 {
92 // call superclass paintComponent method
93 super.paintComponent( g );
94
95 // display icon
96 imageIcon.paintIcon( this, g, 0, 0 );
97 }
98
99 // return image dimensions
100 public Dimension getPreferredSize()
101 {
102 return new Dimension( imageIcon.getIconWidth(),
103 imageIcon.getIconHeight() );
104 }
105
106 } // end class MyJPanel
Fig. Fig. 13.13 13.13 Creating a multiple document interface (part 2 of 3).