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<TITLE>Setting an Accessory Component in a JFileChooser Dialog (Java Developers Almanac Example)
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    <A HREF="../javax.swing.filechooser/pkg.html">javax.swing.filechooser</A><font color="#666666" class="xsmall-font">
        &nbsp;[19 examples]
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  <h3>e899. Setting an Accessory Component in a JFileChooser Dialog</h3>

The <font color="#0066ff"><i>accessory</i></font> is an optional component that can be added to a file
chooser dialog to show a preview image of the selected file.  By default,
a file chooser dialog does not have an accessory installed.  This
example demonstrates how to install an accessory component.


<pre>    JFileChooser chooser = new JFileChooser();
    
    // Create and set the accessory
    chooser.setAccessory(new MyAccessory(chooser));
    
    // Show the dialog; wait until dialog is closed
    chooser.showOpenDialog(<font color="#0066ff"><i>frame</i></font>);
    
    public class MyAccessory extends JComponent implements PropertyChangeListener {
        public MyAccessory(JFileChooser chooser) {
            // Listen for changes to the selected file
            chooser.addPropertyChangeListener(this);
    
            // Set a preferred size
            setPreferredSize(new Dimension(<font color="#0066ff"><i>50</i></font>, <font color="#0066ff"><i>50</i></font>));
        }
    
        // This listener listens for changes to the selected file
        public void propertyChange(PropertyChangeEvent evt) {
            if (JFileChooser.SELECTED_FILE_CHANGED_PROPERTY.equals(
                    evt.getPropertyName())) {
                JFileChooser chooser = (JFileChooser)evt.getSource();
    
                // Get the new selected file
                File newFile = (File)evt.getNewValue();
    
                // Prepare the preview data based on the new selected file
    
                // Repaint this component
                repaint();
            }
        }
    
        public void paint(Graphics g) {
            // Paint a preview of the selected file
        }
    }
</pre>
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            &nbsp;<b>Related Examples</b></font></td>
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e898. <a class="eglink" href="Button.html?l=rel">
    Changing the Text of the Approve Button in a JFileChooser Dialog
</a>
<br>

e900. <a class="eglink" href="PathInTitle.html?l=rel">
    Displaying the Current Directory in the Title of a JFileChooser Dialog
</a>
<br>


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        See also: 
<a class="eglink" href="/egs/javax.swing.filechooser/pkg.html?l=rel#Events">
    Events
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<a class="eglink" href="/egs/javax.swing.filechooser/pkg.html?l=rel#Hidden%20Files">
    Hidden Files
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<a class="eglink" href="/egs/javax.swing.filechooser/pkg.html?l=rel#Icons">
    Icons
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/javax.swing.filechooser/pkg.html?l=rel#Selections">
    Selections
</a>&nbsp;&nbsp;

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