?? libraryhelp.java
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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.*;
public class LibraryHelp extends JInternalFrame {
//Constructor of Class.
public LibraryHelp (String title, String filename) {
//super(Title, Resizable, Closable, Maximizable, Iconifiable)
super (title, true, true, true, true);
setSize (500, 350);
HtmlPane html = new HtmlPane (filename);
setContentPane (html);
setVisible (true);
}
}
//Following Class Show HTML Help inside an EditorPane.
class HtmlPane extends JScrollPane implements HyperlinkListener {
JEditorPane html;
public HtmlPane (String filename) {
try {
File f = new File (filename);
String s = f.getAbsolutePath();
s = "file:" + s;
URL url = new URL (s);
html = new JEditorPane (s);
html.setEditable (false);
html.addHyperlinkListener (this);
JViewport vp = getViewport();
vp.add (html);
}
catch (MalformedURLException e) { }
catch (IOException e) { }
}
//Function Perform By the HyperLinks of HTML Help File.
public void hyperlinkUpdate (HyperlinkEvent e) {
if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
linkActivated (e.getURL());
}
}
//Function for Loading other HTML Pages in Your HTML Help.
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));
}
//Following Class Load Other Pages Included in Our HTML Help File.
class PageLoader implements Runnable {
//Constructor of Class.
PageLoader (URL u, Cursor c) {
url = u;
cursor = c;
}
public void run () {
if (url == null) {
html.setCursor (cursor);
Container parent = html.getParent();
parent.repaint();
}
else {
Document doc = html.getDocument();
try {
html.setPage (url);
}
catch (IOException ioe) {
html.setDocument (doc);
getToolkit().beep();
}
finally {
url = null;
SwingUtilities.invokeLater (this);
}
}
}
URL url;
Cursor cursor;
}
}
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