ImageViewer


1   /*
2    * The contents of this file are subject to the terms of the Common Development
3    * and Distribution License (the License). You may not use this file except in
4    * compliance with the License.
5    *
6    * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7    * or http://www.netbeans.org/cddl.txt.
8    *
9    * When distributing Covered Code, include this CDDL Header Notice in each file
10   * and include the License file at http://www.netbeans.org/cddl.txt.
11   * If applicable, add the following below the CDDL Header, with the fields
12   * enclosed by brackets [] replaced by your own identifying information:
13   * "Portions Copyrighted [year] [name of copyright owner]"
14   *
15   * The Original Software is NetBeans. The Initial Developer of the Original
16   * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17   * Microsystems, Inc. All Rights Reserved.
18   */
19  
20  package examples.imageviewer;
21  
22  /** This class is an entry point of the simple image viewer.
23   * It creates and shows the main application frame.
24   */
25  public class ImageViewer extends javax.swing.JFrame   {
26  
27      /** Image Viewer constructor.
28       * It initializes all GUI components [menu bar, menu items, desktop pane, etc.].
29       */
30      public ImageViewer() {
31          initComponents();
32          pack();
33          setBounds( 100, 100, 400, 400 );
34      }
35  
36      /** This method is called from within the constructor to
37       * initialize the form.
38       * WARNING: Do NOT modify this code. The content of this method is
39       * always regenerated by the FormEditor.
40       */
41      private void initComponents() {//GEN-BEGIN:initComponents
42          desktop = new javax.swing.JDesktopPane  ();
43          mainMenuBar = new javax.swing.JMenuBar  ();
44          fileMenu = new javax.swing.JMenu  ();
45          openMenuItem = new javax.swing.JMenuItem  ();
46          jSeparator1 = new javax.swing.JSeparator  ();
47          exitMenuItem = new javax.swing.JMenuItem  ();
48  
49          setTitle("Image Viewer");
50          addWindowListener(new java.awt.event.WindowAdapter  () {
51              public void windowClosing(java.awt.event.WindowEvent   evt) {
52                  exitForm(evt);
53              }
54          });
55  
56          getAccessibleContext().setAccessibleName("Image Viewer Frame");
57          getContentPane().add(desktop, java.awt.BorderLayout.CENTER);
58          desktop.getAccessibleContext().setAccessibleName("Image Desktop");
59          desktop.getAccessibleContext().setAccessibleDescription("Image desktop");
60  
61          fileMenu.setMnemonic('f');
62          fileMenu.setText("File");
63          openMenuItem.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_O, java.awt.event.InputEvent.CTRL_MASK));
64          openMenuItem.setMnemonic('o');
65          openMenuItem.setText("Open");
66          openMenuItem.addActionListener(new java.awt.event.ActionListener  () {
67              public void actionPerformed(java.awt.event.ActionEvent   evt) {
68                  openMenuItemActionPerformed(evt);
69              }
70          });
71  
72          fileMenu.add(openMenuItem);
73          openMenuItem.getAccessibleContext().setAccessibleName("Open Menu Item");
74          openMenuItem.getAccessibleContext().setAccessibleDescription("Open menu item.");
75  
76          fileMenu.add(jSeparator1);
77  
78          exitMenuItem.setMnemonic('x');
79          exitMenuItem.setText("Exit");
80          exitMenuItem.addActionListener(new java.awt.event.ActionListener  () {
81              public void actionPerformed(java.awt.event.ActionEvent   evt) {
82                  exitMenuItemActionPerformed(evt);
83              }
84          });
85  
86          fileMenu.add(exitMenuItem);
87          exitMenuItem.getAccessibleContext().setAccessibleName("Exit Menu Item");
88          exitMenuItem.getAccessibleContext().setAccessibleDescription("Exit menu item.");
89  
90          mainMenuBar.add(fileMenu);
91          fileMenu.getAccessibleContext().setAccessibleName("File Menu");
92          fileMenu.getAccessibleContext().setAccessibleDescription("File menu.");
93  
94          setJMenuBar(mainMenuBar);
95          mainMenuBar.getAccessibleContext().setAccessibleName("Main Menu Bar");
96          mainMenuBar.getAccessibleContext().setAccessibleDescription("Main menu bar.");
97  
98      }//GEN-END:initComponents
99  
100     /** This method is called when File -> Exit menu item is invoked.
101      * It closes the application.
102      * @param evt ActionEvent instance passed from actionPerformed event.
103      */
104     private void exitMenuItemActionPerformed(java.awt.event.ActionEvent   evt) {//GEN-FIRST:event_exitMenuItemActionPerformed
105         System.exit( 0 );
106     }//GEN-LAST:event_exitMenuItemActionPerformed
107 
108     /** This method is called when File -> Open menu item is invoked.
109      * It displays a dialog to choose the image file to be opened and displayed.
110      * @param evt ActionEvent instance passed from actionPerformed event.
111      */
112     private void openMenuItemActionPerformed(java.awt.event.ActionEvent   evt) {//GEN-FIRST:event_openMenuItemActionPerformed
113         javax.swing.JFileChooser   chooser = new javax.swing.JFileChooser  ();
114         chooser.addChoosableFileFilter(new ImageFileFilter());
115         int option = chooser.showOpenDialog(this);
116         if (option == javax.swing.JFileChooser.APPROVE_OPTION) {
117             java.io.File   file = chooser.getSelectedFile();
118             if (file == null) return;
119             ImageFrame ifr = new ImageFrame(file.getAbsolutePath());
120             desktop.add(ifr, javax.swing.JLayeredPane.DEFAULT_LAYER);
121             
122             ifr.setVisible( true );
123             ifr.setSize(200, 200);
124             ifr.setLocation(0, 0);
125         }
126     }//GEN-LAST:event_openMenuItemActionPerformed
127 
128     /** This method is called when the application frame is closed.
129      * @param evt WindowEvent instance passed from windowClosing event.
130      */
131     private void exitForm(java.awt.event.WindowEvent   evt) {//GEN-FIRST:event_exitForm
132         System.exit(0);
133     }//GEN-LAST:event_exitForm
134 
135     /** Define custom file filter for acceptable image files.
136      */
137     private static class ImageFileFilter extends javax.swing.filechooser.FileFilter   {
138         
139         public boolean accept(java.io.File   file) {
140             if (file == null)
141                 return false;
142             return file.isDirectory() || file.getName().toLowerCase().endsWith(".gif") || file.getName().toLowerCase().endsWith(".jpg");
143         }
144         
145         public String   getDescription() {
146             return "Image files (*.gif, *.jpg)";
147         }
148         
149     }
150 
151 
152     // Variables declaration - do not modify//GEN-BEGIN:variables
153     private javax.swing.JDesktopPane   desktop;
154     private javax.swing.JMenuItem   exitMenuItem;
155     private javax.swing.JMenu   fileMenu;
156     private javax.swing.JSeparator   jSeparator1;
157     private javax.swing.JMenuBar   mainMenuBar;
158     private javax.swing.JMenuItem   openMenuItem;
159     // End of variables declaration//GEN-END:variables
160 
161 
162     /** Starts the application.
163      * @param args Application arguments.
164      */    
165     public static void main(String   args[]) {
166         new ImageViewer().show();
167     }
168 
169 }
170
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