/*
* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle or the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package javademo.swing.dialog.FileChooserDemo;
import java.awt.BorderLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
/*
* FileChooserDemo.java uses these files:
* images/Open16.gif
* images/Save16.gif
*/
@SuppressWarnings("serial")
public class FileChooserDemo extends JPanel implements ActionListener
{
static private final String newline = "\n";
JButton openButton, saveButton;
JTextArea log;
JFileChooser fc;
public FileChooserDemo()
{
super(new BorderLayout());
// Create the log first, because the action listeners
// need to refer to it.
log = new JTextArea(5, 20);
log.setMargin(new Insets(5, 5, 5, 5));
log.setEditable(false);
JScrollPane logScrollPane = new JScrollPane(log);
// Create a file chooser
fc = new JFileChooser();
// Uncomment one of the following lines to try a different
// file selection mode. The first allows just directories
// to be selected (and, at least in the Java look and feel,
// shown). The second allows both files and directories
// to be selected. If you leave these lines commented out,
// then the default mode (FILES_ONLY) will be used.
//
// fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
// fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
// Create the open button. We use the image from the JLF
// Graphics Repository (but we extracted it from the jar).
openButton = new JButton("Open a File...", createImageIcon("images/Open16.gif"));
openButton.addActionListener(this);
// Create the save button. We use the image from the JLF
// Graphics Repository (but we extracted it from the jar).
saveButton = new JButton("Save a File...", createImageIcon("images/Save16.gif"));
saveButton.addActionListener(this);
// For layout purposes, put the buttons in a separate panel
JPanel buttonPanel = new JPanel(); // use FlowLayout
buttonPanel.add(openButton);
buttonPanel.add(saveButton);
// Add the buttons and the log to this panel.
add(buttonPanel, BorderLayout.PAGE_START);
add(logScrollPane, BorderLayout.CENTER);
}
public void actionPerformed(ActionEvent e)
{
// Handle open button action.
if (e.getSource() == openButton)
{
int returnVal = fc.showOpenDialog(FileChooserDemo.this);
if (returnVal == JFileChooser.APPROVE_OPTION)
{
File file = fc.getSelectedFile();
// This is where a real application would open the file.
log.append("Opening: " + file.getName() + "." + newline);
}
else
{
log.append("Open command cancelled by user." + newline);
}
log.setCaretPosition(log.getDocument().getLength());
// Handle save button action.
}
else if (e.getSource() == saveButton)
{
int returnVal = fc.showSaveDialog(FileChooserDemo.this);
if (returnVal == JFileChooser.APPROVE_OPTION)
{
File file = fc.getSelectedFile();
// This is where a real application would save the file.
log.append("Saving: " + file.getName() + "." + newline);
}
else
{
log.append("Save command cancelled by user." + newline);
}
log.setCaretPosition(log.getDocument().getLength());
}
}
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path)
{
java.net.URL imgURL = FileChooserDemo.class.getResource(path);
if (imgURL != null)
{
return new ImageIcon(imgURL);
}
else
{
System.err.println("Couldn't find file: " + path);
return null;
}
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event dispatch thread.
*/
private static void createAndShowGUI()
{
// Create and set up the window.
JFrame frame = new JFrame("FileChooserDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Add content to the window.
frame.add(new FileChooserDemo());
// Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args)
{
// Schedule a job for the event dispatch thread:
// creating and showing this application's GUI.
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
// Turn off metal's use of bold fonts
UIManager.put("swing.boldMetal", Boolean.FALSE);
createAndShowGUI();
}
});
}
}