/*

 * Copyright (c) 1998, 2011, 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 nor 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.

 */

/*

 * This source code is provided to illustrate the usage of a given feature

 * or technique and has been deliberately simplified. Additional steps

 * required for a production-quality application, such as security checks,

 * input validation and proper error handling, might not be present in

 * this sample code.

 */

import javax.swing.*;

import java.awt.*;

import java.net.URL;

import java.net.MalformedURLException;

import java.io.*;

import javax.swing.text.*;

import javax.swing.event.*;

/**

 * @author Steve Wilson

 * @author Alexander Kouznetsov

 */

@SuppressWarnings("serial")

public class MetalworksHelp extends JInternalFrame {

    public MetalworksHelp() {

        super("Help", true, true, true, true);

        setFrameIcon((Icon) UIManager.get("Tree.openIcon")); // PENDING(steve) need more general place to get this icon

        setBounds(200, 25, 400, 400);

        HtmlPane html = new HtmlPane();

        setContentPane(html);

    }

}

@SuppressWarnings("serial")

class HtmlPane extends JScrollPane implements HyperlinkListener {

    JEditorPane html;

    @SuppressWarnings("LeakingThisInConstructor")

    public HtmlPane() {

        try {

            URL url = getClass().getResource("/resources/HelpFiles/toc.html");

            html = new JEditorPane(url);

            html.setEditable(false);

            html.addHyperlinkListener(this);

            html.putClientProperty(JEditorPane.HONOR_DISPLAY_PROPERTIES,

                    Boolean.TRUE);

            JViewport vp = getViewport();

            vp.add(html);

        } catch (MalformedURLException e) {

            System.out.println("Malformed URL: " + e);

        } catch (IOException e) {

            System.out.println("IOException: " + e);

        }

    }

    /**

     * Notification of a change relative to a

     * hyperlink.

     */

    public void hyperlinkUpdate(HyperlinkEvent e) {

        if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {

            linkActivated(e.getURL());

        }

    }

    /**

     * Follows the reference in an

     * link.  The given url is the requested reference.

     * By default this calls <a href="#setPage">setPage</a>,

     * and if an exception is thrown the original previous

     * document is restored and a beep sounded.  If an

     * attempt was made to follow a link, but it represented

     * a malformed url, this method will be called with a

     * null argument.

     *

     * @param u the URL to follow

     */

    protected void linkActivated(URL u) {

        Cursor c = html.getCursor();

        Cursor waitCursor = Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR);

        html.setCursor(waitCursor);

        SwingUtilities.invokeLater(new PageLoader(u, c));

    }

    /**

     * temporary class that loads synchronously (although

     * later than the request so that a cursor change

     * can be done).

     */

    class PageLoader implements Runnable {

        PageLoader(URL u, Cursor c) {

            url = u;

            cursor = c;

        }

        public void run() {

            if (url == null) {

                // restore the original cursor

                html.setCursor(cursor);

                // PENDING(prinz) remove this hack when

                // automatic validation is activated.

                Container parent = html.getParent();

                parent.repaint();

            } else {

                Document doc = html.getDocument();

                try {

                    html.setPage(url);

                } catch (IOException ioe) {

                    html.setDocument(doc);

                    getToolkit().beep();

                } finally {

                    // schedule the cursor to revert after

                    // the paint has happended.

                    url = null;

                    SwingUtilities.invokeLater(this);

                }

            }

        }

        URL url;

        Cursor cursor;

    }

}