📄 multiappletnews.java
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package com.croftsoft.core.gui.multi;
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
import com.croftsoft.core.CroftSoftConstants;
import com.croftsoft.core.lang.NullArgumentException;
import com.croftsoft.core.jnlp.JnlpLib;
/*********************************************************************
* Downloads and displays the latest news web page.
* * <p> * For a partial explanation of the source code, please see * Kim Topley, <i>Core Swing Advanced Programming</i>, * Chapter 4 "JEditorPane and the Swing HTML Package", 2000. * </p> * * @version
* 2003-05-04
* @since
* 2002-02-27
* @author
* <a href="http://www.croftsoft.com/">David Wallace Croft</a>
*********************************************************************/
public final class MultiAppletNews
extends JPanel
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
{ private static final String DEFAULT_NEWS_HTML = "<html><body><pre>" + CroftSoftConstants.DEFAULT_ATTRIBUTION_NOTICE + "</pre></body></html>"; // private final AppletContext appletContext;
private final JEditorPane jEditorPane; //////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
/*********************************************************************
* Main constructor. * * @param applet * * May be null.
*********************************************************************/
public MultiAppletNews ( String newsHTML, String newsPage, Applet applet ) //////////////////////////////////////////////////////////////////////
{
super ( new BorderLayout ( ) ); AppletContext appletContext = null; try
{
appletContext = applet.getAppletContext ( );
}
catch ( Exception ex )
{
} this.appletContext = appletContext;
if ( newsHTML == null ) { if ( newsPage != null ) { newsHTML = "<html><body>" + "Loading " + newsPage + "..." + "</body></html>"; } else { newsHTML = DEFAULT_NEWS_HTML; } } jEditorPane = new JEditorPane ( "text/html", newsHTML );
jEditorPane.setEditable ( false );
jEditorPane.setCaretPosition ( 0 );
jEditorPane.addHyperlinkListener ( new HyperlinkListener ( ) { public void hyperlinkUpdate ( HyperlinkEvent hyperlinkEvent ) { processHyperlinkEvent ( hyperlinkEvent ); }
} );
add ( new JScrollPane ( jEditorPane ), BorderLayout.CENTER ); if ( newsPage != null ) { try { final URL newsURL = new URL ( newsPage );
new Thread (
new Runnable ( )
{
public void run ( )
{ try
{
jEditorPane.setPage ( newsURL );
}
catch ( Exception ex )
{
ex.printStackTrace ( );
}
}
} ).start ( ); } catch ( MalformedURLException ex ) { ex.printStackTrace ( ); } } }
////////////////////////////////////////////////////////////////////// // private methods
//////////////////////////////////////////////////////////////////////
private void processHyperlinkEvent ( HyperlinkEvent hyperlinkEvent )
//////////////////////////////////////////////////////////////////////
{ try
{
if ( hyperlinkEvent.getEventType ( ) == HyperlinkEvent.EventType.ACTIVATED )
{
if ( hyperlinkEvent instanceof HTMLFrameHyperlinkEvent )
{
HTMLDocument htmlDocument
= ( HTMLDocument ) jEditorPane.getDocument ( );
htmlDocument.processHTMLFrameHyperlinkEvent (
( HTMLFrameHyperlinkEvent ) hyperlinkEvent );
}
else
{
URL url = hyperlinkEvent.getURL ( );
if ( appletContext != null )
{
appletContext.showDocument ( url, "_blank" );
}
else
{
try
{
JnlpLib.showDocument ( url );
}
catch ( UnsupportedOperationException ex )
{
jEditorPane.setPage ( url );
}
}
}
}
}
catch ( Exception ex )
{
ex.printStackTrace ( );
}
}
//////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
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