filechooserdemo.java

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/*
 * @(#)FileChooserDemo.java	1.18 06/02/03
 * 
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 * 
 * -Redistribution 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 Sun Microsystems, Inc. or the names of contributors may 
 * be used to endorse or promote products derived from this software without 
 * specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL 
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST 
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, 
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY 
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, 
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */

/*
 * @(#)FileChooserDemo.java	1.18 06/02/03
 */


import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.border.*;
import javax.swing.colorchooser.*;
import javax.swing.filechooser.*;
import javax.accessibility.*;

import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.util.*;
import java.io.*;
import java.applet.*;
import java.net.*;

/**
 * JFileChooserDemo
 *
 * @version 1.18 02/03/06
 * @author Jeff Dinkins
 */
public class FileChooserDemo extends DemoModule {
    JLabel theImage;
    Icon jpgIcon; 
    Icon gifIcon;

    /**
     * main method allows us to run as a standalone demo.
     */
    public static void main(String[] args) {
	FileChooserDemo demo = new FileChooserDemo(null);
	demo.mainImpl();
    }

    /**
     * FileChooserDemo Constructor
     */
    public FileChooserDemo(SwingSet2 swingset) {
	// Set the title for this demo, and an icon used to represent this
	// demo inside the SwingSet2 app.
	super(swingset, "FileChooserDemo", "toolbar/JFileChooser.gif");
	createFileChooserDemo();
    }

    public void createFileChooserDemo() {
	theImage = new JLabel("");
	jpgIcon = createImageIcon("filechooser/jpgIcon.jpg", "jpg image");
	gifIcon = createImageIcon("filechooser/gifIcon.gif", "gif image");

	JPanel demoPanel = getDemoPanel();
	demoPanel.setLayout(new BoxLayout(demoPanel, BoxLayout.Y_AXIS));

	JPanel innerPanel = new JPanel();
	innerPanel.setLayout(new BoxLayout(innerPanel, BoxLayout.X_AXIS));

	demoPanel.add(Box.createRigidArea(VGAP20));
	demoPanel.add(innerPanel);
	demoPanel.add(Box.createRigidArea(VGAP20));

	innerPanel.add(Box.createRigidArea(HGAP20));

	// Create a panel to hold buttons
	JPanel buttonPanel = new JPanel() {
	    public Dimension getMaximumSize() {
		return new Dimension(getPreferredSize().width, super.getMaximumSize().height);
	    }
	};
	buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.Y_AXIS));

	buttonPanel.add(Box.createRigidArea(VGAP15));
	buttonPanel.add(createPlainFileChooserButton());
	buttonPanel.add(Box.createRigidArea(VGAP15));
	buttonPanel.add(createPreviewFileChooserButton());
	buttonPanel.add(Box.createRigidArea(VGAP15));
	buttonPanel.add(createCustomFileChooserButton());
	buttonPanel.add(Box.createVerticalGlue());

	// Create a panel to hold the image
	JPanel imagePanel = new JPanel();
	imagePanel.setLayout(new BorderLayout());
	imagePanel.setBorder(new BevelBorder(BevelBorder.LOWERED));
	JScrollPane scroller = new JScrollPane(theImage);
        scroller.getVerticalScrollBar().setUnitIncrement(10);
        scroller.getHorizontalScrollBar().setUnitIncrement(10);
	imagePanel.add(scroller, BorderLayout.CENTER);

	// add buttons and image panels to inner panel
	innerPanel.add(buttonPanel);
	innerPanel.add(Box.createRigidArea(HGAP30));
	innerPanel.add(imagePanel);
	innerPanel.add(Box.createRigidArea(HGAP20));
    }

    public JFileChooser createFileChooser() {
	// create a filechooser
	JFileChooser fc = new JFileChooser();
        if (getSwingSet2() != null && getSwingSet2().isDragEnabled()) {
            fc.setDragEnabled(true);
        }
	
	// set the current directory to be the images directory
	File swingFile = new File("resources/images/About.jpg");
	if(swingFile.exists()) {
	    fc.setCurrentDirectory(swingFile);
	    fc.setSelectedFile(swingFile);
	}
	
	return fc;
    }


    public JButton createPlainFileChooserButton() {
	Action a = new AbstractAction(getString("FileChooserDemo.plainbutton")) {
	    public void actionPerformed(ActionEvent e) {
		JFileChooser fc = createFileChooser();

		// show the filechooser
		int result = fc.showOpenDialog(getDemoPanel());
		
		// if we selected an image, load the image
		if(result == JFileChooser.APPROVE_OPTION) {
		    loadImage(fc.getSelectedFile().getPath());
		}
	    }
	};
	return createButton(a);
    }

    public JButton createPreviewFileChooserButton() {
	Action a = new AbstractAction(getString("FileChooserDemo.previewbutton")) {
	    public void actionPerformed(ActionEvent e) {
		JFileChooser fc = createFileChooser();

		// Add filefilter & fileview
                javax.swing.filechooser.FileFilter filter = createFileFilter(
                    getString("FileChooserDemo.filterdescription"),
                    "jpg", "gif");
		ExampleFileView fileView = new ExampleFileView();
		fileView.putIcon("jpg", jpgIcon);
		fileView.putIcon("gif", gifIcon);
		fc.setFileView(fileView);
		fc.addChoosableFileFilter(filter);
		fc.setFileFilter(filter);
		
		// add preview accessory
		fc.setAccessory(new FilePreviewer(fc));

		// show the filechooser
		int result = fc.showOpenDialog(getDemoPanel());
		
		// if we selected an image, load the image
		if(result == JFileChooser.APPROVE_OPTION) {
		    loadImage(fc.getSelectedFile().getPath());
		}
	    }
	};
	return createButton(a);
    }

    JDialog dialog;
    JFileChooser fc;

    private javax.swing.filechooser.FileFilter createFileFilter(
            String description, String...extensions) {
        description = createFileNameFilterDescriptionFromExtensions(
                    description, extensions);
        return new FileNameExtensionFilter(description, extensions);
    }

    private String createFileNameFilterDescriptionFromExtensions(
            String description, String[] extensions) {
        String fullDescription = (description == null) ?
                "(" : description + " (";
        // build the description from the extension list
        fullDescription += "." + extensions[0];
        for (int i = 1; i < extensions.length; i++) {
            fullDescription += ", .";
            fullDescription += extensions[i];
        }
        fullDescription += ")";
        return fullDescription;
    }

    public JButton createCustomFileChooserButton() {
	Action a = new AbstractAction(getString("FileChooserDemo.custombutton")) {
	    public void actionPerformed(ActionEvent e) {
		fc = createFileChooser();

		// Add filefilter & fileview
                javax.swing.filechooser.FileFilter filter = createFileFilter(
                    getString("FileChooserDemo.filterdescription"),
                    "jpg", "gif");
		ExampleFileView fileView = new ExampleFileView();
		fileView.putIcon("jpg", jpgIcon);
		fileView.putIcon("gif", gifIcon);
		fc.setFileView(fileView);
		fc.addChoosableFileFilter(filter);

		// add preview accessory
		fc.setAccessory(new FilePreviewer(fc));

		// remove the approve/cancel buttons
		fc.setControlButtonsAreShown(false);

		// make custom controls
		//wokka
		JPanel custom = new JPanel();
		custom.setLayout(new BoxLayout(custom, BoxLayout.Y_AXIS));
		custom.add(Box.createRigidArea(VGAP10));
		JLabel description = new JLabel(getString("FileChooserDemo.description"));
		description.setAlignmentX(JLabel.CENTER_ALIGNMENT);
		custom.add(description);
		custom.add(Box.createRigidArea(VGAP10));
		custom.add(fc);

		Action okAction = createOKAction();
		fc.addActionListener(okAction);

		JPanel buttons = new JPanel();
		buttons.setLayout(new BoxLayout(buttons, BoxLayout.X_AXIS));
		buttons.add(Box.createRigidArea(HGAP10));
		buttons.add(createImageButton(createFindAction()));
		buttons.add(Box.createRigidArea(HGAP10));
		buttons.add(createButton(createAboutAction()));
		buttons.add(Box.createRigidArea(HGAP10));
		buttons.add(createButton(okAction));
		buttons.add(Box.createRigidArea(HGAP10));
		buttons.add(createButton(createCancelAction()));
		buttons.add(Box.createRigidArea(HGAP10));
		buttons.add(createImageButton(createHelpAction()));
		buttons.add(Box.createRigidArea(HGAP10));

		custom.add(buttons);
		custom.add(Box.createRigidArea(VGAP10));
		
		// show the filechooser
		Frame parent = (Frame) SwingUtilities.getAncestorOfClass(Frame.class, getDemoPanel());
		dialog = new JDialog(parent, getString("FileChooserDemo.dialogtitle"), true);
                dialog.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
		dialog.getContentPane().add(custom, BorderLayout.CENTER);
		dialog.pack();
		dialog.setLocationRelativeTo(getDemoPanel());
		dialog.show();
	    }
	};
	return createButton(a);
    }

    public Action createAboutAction() {
	return new AbstractAction(getString("FileChooserDemo.about")) {
	    public void actionPerformed(ActionEvent e) {
		File file = fc.getSelectedFile();
		String text;
		if(file == null) {
		    text = getString("FileChooserDemo.nofileselected");
		} else {
		    text = "<html>" + getString("FileChooserDemo.thefile");
		    text += "<br><font color=green>" + file.getName() + "</font><br>";
		    text += getString("FileChooserDemo.isprobably") + "</html>";
		}
		JOptionPane.showMessageDialog(getDemoPanel(), text);
	    }
	};
    }

    public Action createOKAction() {
	return new AbstractAction(getString("FileChooserDemo.ok")) {
	    public void actionPerformed(ActionEvent e) {
		dialog.dispose();
		if (!e.getActionCommand().equals(JFileChooser.CANCEL_SELECTION)
		    && fc.getSelectedFile() != null) {

		    loadImage(fc.getSelectedFile().getPath());
		}
	    }
	};
    }

    public Action createCancelAction() {
	return new AbstractAction(getString("FileChooserDemo.cancel")) {
	    public void actionPerformed(ActionEvent e) {
		dialog.dispose();
	    }
	};
    }

    public Action createFindAction() {
	Icon icon = createImageIcon("filechooser/find.gif", getString("FileChooserDemo.find"));
	return new AbstractAction("", icon) {
	    public void actionPerformed(ActionEvent e) {
                String result = JOptionPane.showInputDialog(getDemoPanel(), getString("FileChooserDemo.findquestion"));
		if (result != null) {
		    JOptionPane.showMessageDialog(getDemoPanel(), getString("FileChooserDemo.findresponse"));
		}
	    }
	};
    }

    public Action createHelpAction() {
	Icon icon = createImageIcon("filechooser/help.gif", getString("FileChooserDemo.help"));
	return new AbstractAction("", icon) {
	    public void actionPerformed(ActionEvent e) {
		JOptionPane.showMessageDialog(getDemoPanel(), getString("FileChooserDemo.helptext"));
	    }
	};
    }
    
    class MyImageIcon extends ImageIcon {
	public MyImageIcon(String filename) {
	    super(filename);
	};
	public synchronized void paintIcon(Component c, Graphics g, int x, int y) {
	    g.setColor(Color.white);
	    g.fillRect(0,0, c.getWidth(), c.getHeight());
	    if(getImageObserver() == null) {
		g.drawImage(
		    getImage(),
		    c.getWidth()/2 - getIconWidth()/2,
		    c.getHeight()/2 - getIconHeight()/2,
		    c
		);
	    } else {
		g.drawImage(
		    getImage(),
		    c.getWidth()/2 - getIconWidth()/2,
		    c.getHeight()/2 - getIconHeight()/2,
		    getImageObserver()
		);
	    }
	}
    }

    public void loadImage(String filename) {
	theImage.setIcon(new MyImageIcon(filename));
    }

    public JButton createButton(Action a) {
	JButton b = new JButton(a) {
	    public Dimension getMaximumSize() {
		int width = Short.MAX_VALUE;
		int height = super.getMaximumSize().height;
		return new Dimension(width, height);
	    }
	};
	return b;
    }

    public JButton createImageButton(Action a) {
	JButton b = new JButton(a);
	b.setMargin(new Insets(0,0,0,0));
	return b;
    }
}

class FilePreviewer extends JComponent implements PropertyChangeListener {
    ImageIcon thumbnail = null;
    
    public FilePreviewer(JFileChooser fc) {
	setPreferredSize(new Dimension(100, 50));
	fc.addPropertyChangeListener(this);
	setBorder(new BevelBorder(BevelBorder.LOWERED));
    }
    
    public void loadImage(File f) {
        if (f == null) {
            thumbnail = null;
        } else {
	    ImageIcon tmpIcon = new ImageIcon(f.getPath());
	    if(tmpIcon.getIconWidth() > 90) {
		thumbnail = new ImageIcon(
		    tmpIcon.getImage().getScaledInstance(90, -1, Image.SCALE_DEFAULT));
	    } else {
		thumbnail = tmpIcon;
	    }
	}
    }
    
    public void propertyChange(PropertyChangeEvent e) {
	String prop = e.getPropertyName();
	if(prop == JFileChooser.SELECTED_FILE_CHANGED_PROPERTY) {
	    if(isShowing()) {
                loadImage((File) e.getNewValue());
		repaint();
	    }
	}
    }
    
    public void paint(Graphics g) {
	super.paint(g);
	if(thumbnail != null) {
	    int x = getWidth()/2 - thumbnail.getIconWidth()/2;
	    int y = getHeight()/2 - thumbnail.getIconHeight()/2;
	    if(y < 0) {
		y = 0;
	    }
	    
	    if(x < 5) {
		x = 5;
	    }
	    thumbnail.paintIcon(this, g, x, y);
	}
    }
}