Java example source code file (AboutDialog.java)

This example Java source code file (AboutDialog.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

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Java - Java tags/keywords

aboutdialog, awt, bean, borderlayout, center, color, event, gui, hyperlinklistener, jbutton, jcomponent, jeditorpane, jlabel, jpanel, network, north, south, string, swing, tpanel

The AboutDialog.java Java example source code

/*
 * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.tools.jconsole;

import java.awt.*;
import java.awt.event.*;
import java.beans.PropertyVetoException;
import java.net.URI;

import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;

import static sun.misc.Version.jdkMinorVersion;

import static java.awt.BorderLayout.*;
import static sun.tools.jconsole.Utilities.*;

@SuppressWarnings("serial")
public class AboutDialog extends InternalDialog {

    private static final Color textColor     = new Color(87,   88,  89);
    private static final Color bgColor       = new Color(232, 237, 241);
    private static final Color borderColor   = Color.black;

    private Icon mastheadIcon =
        new MastheadIcon(Messages.HELP_ABOUT_DIALOG_MASTHEAD_TITLE);

    private static AboutDialog aboutDialog;

    private JLabel statusBar;
    private Action closeAction;

    public AboutDialog(JConsole jConsole) {
        super(jConsole, Messages.HELP_ABOUT_DIALOG_TITLE, false);

        setAccessibleDescription(this, Messages.HELP_ABOUT_DIALOG_ACCESSIBLE_DESCRIPTION);
        setDefaultCloseOperation(HIDE_ON_CLOSE);
        setResizable(false);
        JComponent cp = (JComponent)getContentPane();

        createActions();

        JLabel mastheadLabel = new JLabel(mastheadIcon);
        setAccessibleName(mastheadLabel,
                Messages.HELP_ABOUT_DIALOG_MASTHEAD_ACCESSIBLE_NAME);

        JPanel mainPanel = new TPanel(0, 0);
        mainPanel.add(mastheadLabel, NORTH);

        String jConsoleVersion = Version.getVersion();
        String vmName = System.getProperty("java.vm.name");
        String vmVersion = System.getProperty("java.vm.version");
        String urlStr = getOnlineDocUrl();
        if (isBrowseSupported()) {
            urlStr = "<a style='color:#35556b' href=\"" + urlStr + "\">" + urlStr + "";
        }

        JPanel infoAndLogoPanel = new JPanel(new BorderLayout(10, 10));
        infoAndLogoPanel.setBackground(bgColor);

        String colorStr = String.format("%06x", textColor.getRGB() & 0xFFFFFF);
        JEditorPane helpLink = new JEditorPane("text/html",
                                "<html>" +
                        Resources.format(Messages.HELP_ABOUT_DIALOG_JCONSOLE_VERSION, jConsoleVersion) +
                "<p>" + Resources.format(Messages.HELP_ABOUT_DIALOG_JAVA_VERSION, (vmName +", "+ vmVersion)) +
                "<p>" + urlStr + "");
        helpLink.setOpaque(false);
        helpLink.setEditable(false);
        helpLink.setForeground(textColor);
        mainPanel.setBorder(BorderFactory.createLineBorder(borderColor));
        infoAndLogoPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        helpLink.addHyperlinkListener(new HyperlinkListener() {
            public void hyperlinkUpdate(HyperlinkEvent e) {
                if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
                    browse(e.getDescription());
                }
            }
        });
        infoAndLogoPanel.add(helpLink, NORTH);

        ImageIcon brandLogoIcon = new ImageIcon(getClass().getResource("resources/brandlogo.png"));
        JLabel brandLogo = new JLabel(brandLogoIcon, JLabel.LEADING);

        JButton closeButton = new JButton(closeAction);

        JPanel bottomPanel = new TPanel(0, 0);
        JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.TRAILING));
        buttonPanel.setOpaque(false);

        mainPanel.add(infoAndLogoPanel, CENTER);
        cp.add(bottomPanel, SOUTH);

        infoAndLogoPanel.add(brandLogo, SOUTH);

        buttonPanel.setBorder(new EmptyBorder(2, 12, 2, 12));
        buttonPanel.add(closeButton);
        bottomPanel.add(buttonPanel, NORTH);

        statusBar = new JLabel(" ");
        bottomPanel.add(statusBar, SOUTH);

        cp.add(mainPanel, NORTH);

        pack();
        setLocationRelativeTo(jConsole);
        Utilities.updateTransparency(this);
    }

    public void showDialog() {
        statusBar.setText(" ");
        setVisible(true);
        try {
            // Bring to front of other dialogs
            setSelected(true);
        } catch (PropertyVetoException e) {
            // ignore
        }
    }

    private static AboutDialog getAboutDialog(JConsole jConsole) {
        if (aboutDialog == null) {
            aboutDialog = new AboutDialog(jConsole);
        }
        return aboutDialog;
    }

    static void showAboutDialog(JConsole jConsole) {
        getAboutDialog(jConsole).showDialog();
    }

    static void browseUserGuide(JConsole jConsole) {
        getAboutDialog(jConsole).browse(getOnlineDocUrl());
    }

    static boolean isBrowseSupported() {
        return (Desktop.isDesktopSupported() &&
                Desktop.getDesktop().isSupported(Desktop.Action.BROWSE));
    }

    void browse(String urlStr) {
        try {
            Desktop.getDesktop().browse(new URI(urlStr));
        } catch (Exception ex) {
            showDialog();
            statusBar.setText(ex.getLocalizedMessage());
            if (JConsole.isDebug()) {
                ex.printStackTrace();
            }
        }
    }

    private void createActions() {
        closeAction = new AbstractAction(Messages.CLOSE) {
            public void actionPerformed(ActionEvent ev) {
                setVisible(false);
                statusBar.setText("");
            }
        };
    }

    private static String getOnlineDocUrl() {
        String version = Integer.toString(jdkMinorVersion());
        return Resources.format(Messages.HELP_ABOUT_DIALOG_USER_GUIDE_LINK_URL,
                                version);
    }

    private static class TPanel extends JPanel {
        TPanel(int hgap, int vgap) {
            super(new BorderLayout(hgap, vgap));
            setOpaque(false);
        }
    }
}

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