/[schmitzm]/trunk/src/skrueger/swing/CancellableDialogAdapter.java
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revision 432 by alfonx, Fri Oct 2 00:47:48 2009 UTC revision 433 by alfonx, Sun Oct 4 16:57:29 2009 UTC
# Line 2  package skrueger.swing; Line 2  package skrueger.swing;
2    
3  import java.awt.Component;  import java.awt.Component;
4  import java.awt.Dialog;  import java.awt.Dialog;
5    import java.awt.event.ActionEvent;
6    import java.awt.event.ActionListener;
7    import java.awt.event.KeyEvent;
8  import java.awt.event.WindowAdapter;  import java.awt.event.WindowAdapter;
9  import java.awt.event.WindowEvent;  import java.awt.event.WindowEvent;
10    
11    import javax.swing.JComponent;
12  import javax.swing.JDialog;  import javax.swing.JDialog;
13  import javax.swing.JOptionPane;  import javax.swing.JOptionPane;
14    import javax.swing.JRootPane;
15    import javax.swing.KeyStroke;
16    
17  import schmitzm.swing.SwingUtil;  import schmitzm.swing.SwingUtil;
18    
# Line 15  import schmitzm.swing.SwingUtil; Line 21  import schmitzm.swing.SwingUtil;
21   * cancellable {@link JDialog}s work. The {@link JDialog} is designed to work on   * cancellable {@link JDialog}s work. The {@link JDialog} is designed to work on
22   * the real object and restore it's state when the user cancels the   * the real object and restore it's state when the user cancels the
23   * {@link JDialog}.   * {@link JDialog}.
24     *
25     * Pressing ESC or clicking the "Close X" results in asking the user whether to Save/Cancel/Abort .  
26   */   */
27  public abstract class CancellableDialogAdapter extends JDialog implements  public abstract class CancellableDialogAdapter extends JDialog implements
28                  CancellableDialog {                  CancellableDialog {
# Line 113  public abstract class CancellableDialogA Line 121  public abstract class CancellableDialogA
121                  dispose();                  dispose();
122                  return true;                  return true;
123          }          }
124            
125    
126            /**
127             * Since the registerKeyboardAction() method is part of the JComponent class
128             * definition, you must define the Escape keystroke and register the
129             * keyboard action with a JComponent, not with a JDialog. The JRootPane for
130             * the JDialog serves as an excellent choice to associate the registration,
131             * as this will always be visible. If you override the protected
132             * createRootPane() method of JDialog, you can return your custom JRootPane
133             * with the keystroke enabled:
134             */
135            @Override
136            protected JRootPane createRootPane() {
137                    final KeyStroke stroke = KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0);
138                    final JRootPane rootPane = new JRootPane();
139                    rootPane.registerKeyboardAction(new ActionListener() {
140    
141                            public void actionPerformed(final ActionEvent e) {
142                                    close();
143                            }
144    
145                    }, stroke, JComponent.WHEN_IN_FOCUSED_WINDOW);
146    
147                    return rootPane;
148            }
149    
150    
151  }  }
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