swing applet programming HELP!!!
Hey,
I am having a NIGHTMARE of a time trying to write a simple applet client for ftp over SSH. I thought it was going to be the networking syntax that was going to give me trouble. Turns out its the gui that I am getting most gyp with.
The part that I am most stuck with is trying to create a box that displays the local file system and a box that contains the server file system. I looked at using a JFilechooser but it turned out that wouldnt do what I wanted so I thought, I know I will use a JTree. That looked like the perfect solution but then I couldnt get it to work accessing the file system.
Now, It would be a school boy error to overlook the fact that an applet cannot access a files or clipboard on a machine unless it is trusted. SO I created a certificate for permission and a JAR file to allow it permission to access the system, but now my main applet cannot access any of the external classes that I have written. Let me elaborate on the situation so far:
I have:
Sting.java
Sting.class
Description: This is the main Applet code
----------------------------
guiLayout.java
guiLayout.class
Description: This is the swing portion of the applet. I put it in a separate class so that It would keep to some form of OOP.
---------------------------
StingAuth - Certificate
Sting.Jar - JAR file
Sting.Bat - Batch file for compiling the JAR.
Here is the code from Sting.java:
Code:
/*
***********************************
Sting SFtp
Creator: Stephen Cheesley
Designer: Stephen Cheesley
***********************************
*/
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JFileChooser.*;
import javax.swing.filechooser.*;
import java.applet.*;
public class Sting extends JApplet //implements ActionListener
{
private Component me;
public void init()
{
try
{
javax.swing.SwingUtilities.invokeAndWait(new Runnable()
{
public void run()
{
guiLayout steve = new guiLayout();
getContentPane().add(steve);
}
});
}
catch (Exception e)
{
System.err.println("ActionEvent e FOULED UP");
}
}
public void start()
{
}
public void stop()
{
}
}
Here is the code for guiLayout.java
Code:
/*
***********************************
Sting SFtp
guiLayout.class is a package belonging to
Sting SFtp. It is responsible for the look
and feel of the software.
Creator: Stephen Cheesley
Designer: Stephen Cheesley
***********************************
*/
import java.io.*;
import java.io.File;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.JFileChooser.*;
import java.applet.*;
import java.util.*;
import java.lang.*;
public class guiLayout extends JApplet implements ActionListener
{
public guiLayout()
{
//Where the variables are created:
JMenuBar menuBar;
JMenu file, help;
JMenuItem menuItem;
final JPanel welcome, files_local, files_server;
JLabel Wlabel, Llabel, Slabel, about1;
JButton testButton;
// *****************************************************
// *****************************************************
// ------------------------------------------------
//| MenuBar Setup |
// ------------------------------------------------
//Create the menu bar.
menuBar = new JMenuBar();
//Create file menu.
file = new JMenu("File");
file.setMnemonic(KeyEvent.VK_A);
file.getAccessibleContext().setAccessibleDescription(
"The only menu in this program that has menu items");
menuBar.add(file);
//Add Items to the file menu
menuItem = new JMenuItem("Cut");
file.add(menuItem);
menuItem = new JMenuItem("Copy");
file.add(menuItem);
menuItem = new JMenuItem("Paste");
file.add(menuItem);
file.addSeparator();
menuItem = new JMenuItem("Logout");
file.add(menuItem);
//Create help menu
help = new JMenu("Help");
menuBar.add(help);
//Add Items to the help menu
menuItem = new JMenuItem("Readme");
help.add(menuItem);
// help.addSeparator(); --- Separator
menuItem = new JMenuItem("About Sting...");
help.add(menuItem);
menuItem.addActionListener(this);
menuItem.setActionCommand("about");
//Add the menu bar to the GUI
setJMenuBar(menuBar);
// *****************************************************
// *****************************************************
// ------------------------------------------------
//| Panel Layout |
// ------------------------------------------------
// This section sets the three main layout panels in
// positions top left and right.
// The top "Welcome" panel
welcome = new JPanel();
welcome.setBackground(Color.white);
getContentPane().add(welcome, BorderLayout.PAGE_START);
Wlabel = new JLabel("Welcome <user> ...");
welcome.add("West",Wlabel);
testButton = new JButton("Test");
welcome.add(testButton);
// The left panel for local file handler
files_local = new JPanel();
files_local.setBackground(Color.red);
getContentPane().add(files_local, BorderLayout.LINE_START);
Llabel = new JLabel("Local Files ");
files_local.add(Llabel);
//The right panel for server file Handler
files_server = new JPanel();
files_server.setBackground(Color.blue);
getContentPane().add(files_server, BorderLayout.LINE_END);
Slabel = new JLabel("Server Files ");
files_server.add(Slabel);
// -------------------------------------------------
testButton.addActionListener(this);
testButton.setActionCommand("test");
// *****************************************************
// -----------------------------------------------------
// Create JTree
// -----------------------------------------------------
}
/*
JTree dirTree = null;
public void FileTree()
{
//initComponents();
File dir = new File("C:/j2me");
dirTree = new JTree(dir.listFiles());
dirTree.setPreferredSize(new Dimension(200, 400));
files_local.add(dirTree);
//this.setSize(350,450);
}*/
// ******************************************************************************
// -------------------------------------------------------------------
//
//
public void actionPerformed(ActionEvent e)
{
String s = e.getActionCommand();
if(s==("about"))
{
JLabel about1, about2, about3, title;
JPanel about;
about1 = new JLabel("Sting SFTP...");
about2 = new JLabel("Written By: Stephen Cheesley");
about3 = new JLabel("Developed: 26/06/2006");
about = new JPanel();
about.setLayout(new BorderLayout());
about.add("North", about1);
about.add("Center",about2);
about.add("South",about3);
JOptionPane.showMessageDialog(getContentPane(),about,"Sting SFTP",JOptionPane.PLAIN_MESSAGE);
}
else if(s==("test"))
{
/*
final JFileChooser chooser = new JFileChooser();
int returnVal = chooser.showOpenDialog(this);
if (returnVal == JFileChooser.APPROVE_OPTION)
{
File file = chooser.getSelectedFile();
//if (file!=null)
//{}// do something with file
}*/
}
}
}
I hope someone can help as this has become really frustrating.
Many thanks,
Steve
