filechooserdemo.java

一个小公司要求给写的很简单的任务管理系统。

/*
 * @(#)FileChooserDemo.java	1.31 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	1.31 06/02/03
 */

import javax.swing.*;
import javax.swing.filechooser.*;
import javax.swing.plaf.FileChooserUI;
import javax.swing.plaf.basic.BasicFileChooserUI;

import java.awt.*;
import java.io.File;
import java.awt.event.*;
import java.beans.*;
import java.util.Vector;

import static javax.swing.JFileChooser.*;

/**
 *
 * A demo which makes extensive use of the file chooser.
 *
 * 1.31 02/03/06
 * @author Jeff Dinkins
 */
public class FileChooserDemo extends JPanel implements ActionListener {
    static JFrame frame;

    Vector<SupportedLaF> supportedLaFs = new Vector();

    static class SupportedLaF {
	String name;
	LookAndFeel laf;

	SupportedLaF(String name, LookAndFeel laf) {
	    this.name = name;
	    this.laf = laf;
	}

	public String toString() {
	    return name;
	}
    }


    JButton showButton;

    JCheckBox showAllFilesFilterCheckBox;
    JCheckBox showImageFilesFilterCheckBox;
    JCheckBox showFullDescriptionCheckBox;
    
    JCheckBox useFileViewCheckBox;
    JCheckBox accessoryCheckBox;
    JCheckBox setHiddenCheckBox;
    JCheckBox useEmbedInWizardCheckBox;
    JCheckBox useControlsCheckBox;
    JCheckBox enableDragCheckBox;

    JRadioButton singleSelectionRadioButton;
    JRadioButton multiSelectionRadioButton;

    JRadioButton openRadioButton;
    JRadioButton saveRadioButton;
    JRadioButton customButton;

    JComboBox lafComboBox;

    JRadioButton justFilesRadioButton;
    JRadioButton justDirectoriesRadioButton;
    JRadioButton bothFilesAndDirectoriesRadioButton;

    JTextField customField;

    FileFilter jpgFilter, gifFilter, bothFilter;
    ExampleFileView fileView;

    JPanel buttonPanel;

    public final static Dimension hpad10 = new Dimension(10,1);
    public final static Dimension vpad20 = new Dimension(1,20);
    public final static Dimension vpad7 = new Dimension(1, 7);
    public final static Dimension vpad4 = new Dimension(1, 4);
    public final static Insets insets = new Insets(5, 10, 0, 10);

    FilePreviewer previewer;
    JFileChooser chooser;

    public FileChooserDemo() {
	UIManager.LookAndFeelInfo[] installedLafs = UIManager.getInstalledLookAndFeels();
	for (UIManager.LookAndFeelInfo lafInfo : installedLafs) {
	    try { 
		Class lnfClass = Class.forName(lafInfo.getClassName());
		LookAndFeel laf = (LookAndFeel)(lnfClass.newInstance());
		if (laf.isSupportedLookAndFeel()) {
		    String name = lafInfo.getName();
		    supportedLaFs.add(new SupportedLaF(name, laf));
		}
	    } catch (Exception e) { // If ANYTHING weird happens, don't add it
		continue;
	    }
	}

	setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));

	chooser = new JFileChooser();
	previewer = new FilePreviewer(chooser);

	// Create Custom FileView
	fileView = new ExampleFileView();
	fileView.putIcon("jpg", new ImageIcon(getClass().getResource("/resources/images/jpgIcon.jpg")));
	fileView.putIcon("gif", new ImageIcon(getClass().getResource("/resources/images/gifIcon.gif")));

	// create a radio listener to listen to option changes
	OptionListener optionListener = new OptionListener();

	// Create options
	openRadioButton = new JRadioButton("Open");
	openRadioButton.setSelected(true);
	openRadioButton.addActionListener(optionListener);

	saveRadioButton = new JRadioButton("Save");
	saveRadioButton.addActionListener(optionListener);

	customButton = new JRadioButton("Custom");
	customButton.addActionListener(optionListener);

	customField = new JTextField(8) {
	    public Dimension getMaximumSize() {
		return new Dimension(getPreferredSize().width, getPreferredSize().height);
	    }
	};
	customField.setText("Doit");
	customField.setAlignmentY(JComponent.TOP_ALIGNMENT);
	customField.setEnabled(false);
	customField.addActionListener(optionListener);

	ButtonGroup group1 = new ButtonGroup();
	group1.add(openRadioButton);
	group1.add(saveRadioButton);
	group1.add(customButton);

	// filter buttons
        showAllFilesFilterCheckBox = new JCheckBox("Show \"All Files\" Filter");
        showAllFilesFilterCheckBox.addActionListener(optionListener);
        showAllFilesFilterCheckBox.setSelected(true);
        
        showImageFilesFilterCheckBox = new JCheckBox("Show JPG and GIF Filters");
        showImageFilesFilterCheckBox.addActionListener(optionListener);
        showImageFilesFilterCheckBox.setSelected(false);
        
	accessoryCheckBox = new JCheckBox("Show Preview");
	accessoryCheckBox.addActionListener(optionListener);
	accessoryCheckBox.setSelected(false);

	// more options
	setHiddenCheckBox = new JCheckBox("Show Hidden Files");
	setHiddenCheckBox.addActionListener(optionListener);

	showFullDescriptionCheckBox = new JCheckBox("With File Extensions");
	showFullDescriptionCheckBox.addActionListener(optionListener);
	showFullDescriptionCheckBox.setSelected(true);
        showFullDescriptionCheckBox.setEnabled(false);

	useFileViewCheckBox = new JCheckBox("Use FileView");
	useFileViewCheckBox.addActionListener(optionListener);
	useFileViewCheckBox.setSelected(false);

	useEmbedInWizardCheckBox = new JCheckBox("Embed in Wizard");
	useEmbedInWizardCheckBox.addActionListener(optionListener);
	useEmbedInWizardCheckBox.setSelected(false);
        
	useControlsCheckBox = new JCheckBox("Show Control Buttons");
	useControlsCheckBox.addActionListener(optionListener);
	useControlsCheckBox.setSelected(true);
        
        enableDragCheckBox = new JCheckBox("Enable Dragging");
        enableDragCheckBox.addActionListener(optionListener);

	// File or Directory chooser options
	ButtonGroup group3 = new ButtonGroup();
	justFilesRadioButton = new JRadioButton("Just Select Files");
	justFilesRadioButton.setSelected(true);
	group3.add(justFilesRadioButton);
	justFilesRadioButton.addActionListener(optionListener);

	justDirectoriesRadioButton = new JRadioButton("Just Select Directories");
	group3.add(justDirectoriesRadioButton);
	justDirectoriesRadioButton.addActionListener(optionListener);

	bothFilesAndDirectoriesRadioButton = new JRadioButton("Select Files or Directories");
	group3.add(bothFilesAndDirectoriesRadioButton);
	bothFilesAndDirectoriesRadioButton.addActionListener(optionListener);

	singleSelectionRadioButton = new JRadioButton("Single Selection", true);
	singleSelectionRadioButton.addActionListener(optionListener);

	multiSelectionRadioButton = new JRadioButton("Multi Selection");
	multiSelectionRadioButton.addActionListener(optionListener);

	ButtonGroup group4 = new ButtonGroup();
	group4.add(singleSelectionRadioButton);
	group4.add(multiSelectionRadioButton);


	// Create show button
	showButton = new JButton("Show FileChooser");
	showButton.addActionListener(this);
        showButton.setMnemonic('s');

	// Create laf combo box
	

	lafComboBox = new JComboBox(supportedLaFs);
	lafComboBox.setEditable(false);
	lafComboBox.addActionListener(optionListener);

	// ********************************************************
	// ******************** Dialog Type ***********************
	// ********************************************************
	JPanel control1 = new InsetPanel(insets);
	control1.setBorder(BorderFactory.createTitledBorder("Dialog Type"));

	control1.setLayout(new BoxLayout(control1, BoxLayout.Y_AXIS));
	control1.add(Box.createRigidArea(vpad20));
	control1.add(openRadioButton);
	control1.add(Box.createRigidArea(vpad7));
	control1.add(saveRadioButton);
	control1.add(Box.createRigidArea(vpad7));
	control1.add(customButton);
	control1.add(Box.createRigidArea(vpad4));
        JPanel fieldWrapper = new JPanel();
        fieldWrapper.setLayout(new BoxLayout(fieldWrapper, BoxLayout.X_AXIS));
        fieldWrapper.setAlignmentX(Component.LEFT_ALIGNMENT);
        fieldWrapper.add(Box.createRigidArea(hpad10));
        fieldWrapper.add(Box.createRigidArea(hpad10));
        fieldWrapper.add(customField);
	control1.add(fieldWrapper);
        control1.add(Box.createRigidArea(vpad20));
	control1.add(Box.createGlue());

	// ********************************************************
	// ***************** Filter Controls **********************
	// ********************************************************
	JPanel control2 = new InsetPanel(insets);
	control2.setBorder(BorderFactory.createTitledBorder("Filter Controls"));
	control2.setLayout(new BoxLayout(control2, BoxLayout.Y_AXIS));
	control2.add(Box.createRigidArea(vpad20));
        control2.add(showAllFilesFilterCheckBox);
	control2.add(Box.createRigidArea(vpad7));
        control2.add(showImageFilesFilterCheckBox);
        control2.add(Box.createRigidArea(vpad4));
        JPanel checkWrapper = new JPanel();
        checkWrapper.setLayout(new BoxLayout(checkWrapper, BoxLayout.X_AXIS));
        checkWrapper.setAlignmentX(Component.LEFT_ALIGNMENT);
        checkWrapper.add(Box.createRigidArea(hpad10));
        checkWrapper.add(Box.createRigidArea(hpad10));
        checkWrapper.add(showFullDescriptionCheckBox);
        control2.add(checkWrapper);
	control2.add(Box.createRigidArea(vpad20));
	control2.add(Box.createGlue());

	// ********************************************************
	// ****************** Display Options *********************
	// ********************************************************
	JPanel control3 = new InsetPanel(insets);
	control3.setBorder(BorderFactory.createTitledBorder("Display Options"));
	control3.setLayout(new BoxLayout(control3, BoxLayout.Y_AXIS));
	control3.add(Box.createRigidArea(vpad20));
	control3.add(setHiddenCheckBox);
	control3.add(Box.createRigidArea(vpad7));
	control3.add(useFileViewCheckBox);
	control3.add(Box.createRigidArea(vpad7));
	control3.add(accessoryCheckBox);
	control3.add(Box.createRigidArea(vpad7));
	control3.add(useEmbedInWizardCheckBox);
	control3.add(Box.createRigidArea(vpad7));
	control3.add(useControlsCheckBox);
        control3.add(Box.createRigidArea(vpad7));
        control3.add(enableDragCheckBox);
	control3.add(Box.createRigidArea(vpad20));
	control3.add(Box.createGlue());

	// ********************************************************
	// ************* File & Directory Options *****************
	// ********************************************************
	JPanel control4 = new InsetPanel(insets);
	control4.setBorder(BorderFactory.createTitledBorder("File and Directory Options"));
	control4.setLayout(new BoxLayout(control4, BoxLayout.Y_AXIS));
	control4.add(Box.createRigidArea(vpad20));
	control4.add(justFilesRadioButton);
	control4.add(Box.createRigidArea(vpad7));
	control4.add(justDirectoriesRadioButton);
	control4.add(Box.createRigidArea(vpad7));
	control4.add(bothFilesAndDirectoriesRadioButton);
	control4.add(Box.createRigidArea(vpad20));
	control4.add(singleSelectionRadioButton);
	control4.add(Box.createRigidArea(vpad7));
	control4.add(multiSelectionRadioButton);
	control4.add(Box.createRigidArea(vpad20));
	control4.add(Box.createGlue());


	// ********************************************************
	// **************** Look & Feel Switch ********************
	// ********************************************************
	JPanel panel = new JPanel();
	panel.add(new JLabel("Look and Feel: "));
	panel.add(lafComboBox);
	panel.add(showButton);

	// ********************************************************
	// ****************** Wrap 'em all up *********************
	// ********************************************************
	JPanel wrapper = new JPanel();
	wrapper.setLayout(new BoxLayout(wrapper, BoxLayout.X_AXIS));

	add(Box.createRigidArea(vpad20));

	wrapper.add(Box.createRigidArea(hpad10));
        wrapper.add(Box.createRigidArea(hpad10));
	wrapper.add(control1);
	wrapper.add(Box.createRigidArea(hpad10));
	wrapper.add(control2);
	wrapper.add(Box.createRigidArea(hpad10));
	wrapper.add(control3);
	wrapper.add(Box.createRigidArea(hpad10));
	wrapper.add(control4);
	wrapper.add(Box.createRigidArea(hpad10));
        wrapper.add(Box.createRigidArea(hpad10));

	add(wrapper);
	add(Box.createRigidArea(vpad20));
	add(panel);
	add(Box.createRigidArea(vpad20));
    }

    public void actionPerformed(ActionEvent e) {
        if (customButton.isSelected()) {
            chooser.setApproveButtonText(customField.getText());    
        }        
	if (chooser.isMultiSelectionEnabled()) {
	    chooser.setSelectedFiles(null);
	} else {
	    chooser.setSelectedFile(null);
	}
        // clear the preview from the previous display of the chooser
        JComponent accessory = chooser.getAccessory();
        if (accessory != null) {
            ((FilePreviewer)accessory).loadImage(null);
        }

	if (useEmbedInWizardCheckBox.isSelected()) {
	    WizardDialog wizard = new WizardDialog(frame, true);
	    wizard.setVisible(true);
	    wizard.dispose();
	    return;
	}