• Post Reply
  • Bookmark Topic Watch Topic
  • New Topic

Browser component for on-line help

 
Steve Wayne
Greenhorn
Posts: 14
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi All,
Is anyone aware of a browser component for the on-line? It looks to me like the HTMLDocument.HTMLReader is really a parsing engine, similar to SAX (maybe I'm wrong here). I'm hoping that there's a component that I can just plug in a dialog and have it handle the html help file, links and all.
Thanks!!
Steve
 
Jeb Beasley
Greenhorn
Posts: 9
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
try something like this
JEditorPane pane = new JEditorPane();
pane.setContentType("text/html");
pane.read( new FileInputStream( url ), "Help File" );
It doesn't support the full set of html so expect to be a bit disappointed, but it will work. Some trial and error. You will find that bold tags inside font taggs don't work.
or to bring it up in a real browser....
// Here is the code for BrowserControl.java:
import java.io.IOException;
/**
* A simple, static class to display a URL in the system browser.

*
* Under Unix, the system browser is hard-coded to be 'netscape'.
* Netscape must be in your PATH for this to work. This has been
* tested with the following platforms: AIX, HP-UX and Solaris.

*
* Under Windows, this will bring up the default browser under windows,
* usually either Netscape or Microsoft IE. The default browser is
* determined by the OS. This has been tested under Windows 95/98/NT.

*
* Examples:

*
BrowserControl.displayURL("http://www.javaworld.com")
*
BrowserControl.displayURL("file://c:\\docs\\index.html")
*
BrowserContorl.displayURL("file:///user/joe/index.html");
*

* Note - you must include the url type -- either "http://" or
* "file://".
*/
public class BrowserControl
{
/**
* Display a file in the system browser. If you want to display a
* file, you must include the absolute path name.
*
* @param url the file's url (the url must start with either "http://"
or
* "file://").
*/
public static void displayURL(String url)
{
boolean windows = isWindowsPlatform();
String cmd = null;
try
{
if (windows)
{
// cmd = 'rundll32 url.dll,FileProtocolHandler http://...'
cmd = WIN_PATH + " " + WIN_FLAG + " " + url;
Process p = Runtime.getRuntime().exec(cmd);
}
else
{
// Under Unix, Netscape has to be running for the "-remote"
// command to work. So, we try sending the command and
// check for an exit value. If the exit command is 0,
// it worked, otherwise we need to start the browser.
// cmd = 'netscape -remote openURL(http://www.javaworld.com)'
cmd = UNIX_PATH + " " + UNIX_FLAG + "(" + url + ")";
Process p = Runtime.getRuntime().exec(cmd);
try
{
// wait for exit code -- if it's 0, command worked,
// otherwise we need to start the browser up.
int exitCode = p.waitFor();
if (exitCode != 0)
{
// Command failed, start up the browser
// cmd = 'netscape http://www.javaworld.com'
cmd = UNIX_PATH + " " + url;
p = Runtime.getRuntime().exec(cmd);
}
}
catch(InterruptedException x)
{
System.err.println("Error bringing up browser, cmd='" +
cmd + "'");
System.err.println("Caught: " + x);
}
}
}
catch(IOException x)
{
// couldn't exec browser
System.err.println("Could not invoke browser, command=" + cmd);
System.err.println("Caught: " + x);
}
}
/**
* Try to determine whether this application is running under Windows
* or some other platform by examing the "os.name" property.
*
* @return true if this application is running under a Windows OS
*/
public static boolean isWindowsPlatform()
{
String os = System.getProperty("os.name");
if ( os != null && os.startsWith(WIN_ID))
return true;
else
return false;
}
/**
* Simple example.
*/
public static void main(String[] args)
{
displayURL("http://www.javaworld.com");
}

// Used to identify the windows platform.
private static final String WIN_ID = "Windows";
// The default system browser under windows.
private static final String WIN_PATH = "rundll32";
// The flag to display a url.
private static final String WIN_FLAG = "url.dll,FileProtocolHandler";
// The default browser under unix.
private static final String UNIX_PATH = "netscape";
// The flag to display a url.
private static final String UNIX_FLAG = "-remote openURL";
 
Steve Wayne
Greenhorn
Posts: 14
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thanks Jeb!
That was exactly what I was looking for. I'll put the JEditorPane in a tabbed pane and have a cheap and easy on line help.
I saw the browser method in an article but it seems rather clumsy.
Thanks again!
Steve
 
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic