HelpOverviewDialog.java

/*
 * HelpOverviewDialog.java
 *
 * This file is part of TDA - Thread Dump Analysis Tool.
 *
 * TDA is free software; you can redistribute it and/or modify
 * it under the terms of the Lesser GNU General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * TDA 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
 * Lesser GNU General Public License for more details.
 *
 * You should have received a copy of the Lesser GNU General Public License
 * along with TDA; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * $Id: HelpOverviewDialog.java,v 1.11 2008-01-20 12:00:40 irockel Exp $
 */

package com.pironet.tda;

import com.pironet.tda.utils.Browser;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;

/**
 *
 * @author irockel
 */
public class HelpOverviewDialog extends JDialog {
    private JEditorPane htmlView;
    private JPanel buttonPanel;
    private JButton closeButton;
    
    private String file;
    
    /** 
     * Creates a new instance of HelpOverviewDialog 
     */
    public HelpOverviewDialog(JFrame owner, String title, String file, Image icon) {
        super(owner, title);
        setFile(file);
        if(icon != null) {
            try {
                this.setIconImage(icon);
            } catch (NoSuchMethodError nsme) {
            // ignore, for 1.4 backward compatibility
            }
        }
        getContentPane().setLayout(new BorderLayout());
        initPanel();
        setLocationRelativeTo(owner);
    }
        
    private void initPanel() {
        try {
            URL tutURL = HelpOverviewDialog.class.getResource(getFile());
            htmlView = new JEditorPane(tutURL);
        } catch (MalformedURLException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        
        htmlView.addHyperlinkListener(
                new HyperlinkListener() {
            public void hyperlinkUpdate(HyperlinkEvent evt) {
                // if a link was clicked
                if(evt.getEventType()==HyperlinkEvent.EventType.ACTIVATED) {
                    try {
                        if(evt.getURL().toString().indexOf("#") >= 0) {
                            // show internal anchors in editor pane.
                            htmlView.setPage(evt.getURL());
                        } else {
                            // launch a browser with the appropriate URL
                            Browser.open(evt.getURL().toString());
                        }
                    } catch(InterruptedException e) {
                        System.out.println("Error launching external browser.");
                    } catch(IOException e) {
                        System.out.println("I/O error launching external browser." + e.getMessage());
                        e.printStackTrace();
                    }
                }
            }
        });
        
        JScrollPane scrollPane = new JScrollPane(htmlView);
        htmlView.setEditable(false);
        htmlView.setPreferredSize(new Dimension(780, 600));
        htmlView.setCaretPosition(0);
        getContentPane().add(scrollPane, BorderLayout.CENTER);
        closeButton = new JButton("Close");
        buttonPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
        buttonPanel.add(closeButton);
        getContentPane().add(buttonPanel, BorderLayout.SOUTH);
        
        closeButton.addActionListener( new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                dispose();
            }
        });
        getRootPane().setDefaultButton(closeButton);
    }
        
    //Must be called from the event-dispatching thread.
    public void resetFocus() {
        //searchField.requestFocusInWindow();
    }

    private String getFile() {
        return(file);
    }
    
    private void setFile(String value) {
        file = value;
    }    
}