Yo guys.. I just finished up with this download manager stuff.. so I'm leaving in here the coding for the same in java ;)
Create your own download manager and have fun :)
package DownloadManager;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
/**
*
* @author Anirudha
*/
public class DownloadManager extends JFrame implements Observer{
private JTextField addTextField;
private DownloadsTableModel tableModel;
private JTable table;
private JButton pauseButton, resumeButton;
private JButton cancelButton, clearButton;
private Download selectedDownload;
private boolean clearing;
public DownloadManager(){
setTitle("Joy's Download Manager");
setSize(640,480);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
actionExit();
}
});
JMenuBar menu= new JMenuBar();
JMenu fileMenu= new JMenu("File");
fileMenu.setMnemonic(KeyEvent.VK_F);
JMenuItem fileExitMenuItem= new JMenuItem("Exit",KeyEvent.VK_X);
fileExitMenuItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
actionExit();
}
});
fileMenu.add(fileExitMenuItem);
menuBar.add(fileMenu);
setJMenuBar(menuBar);
JPanel addPanel= new JPanel();
addTextField= new JTextField(30);
addPanel.add(addTextField);
JButton addButton= new JButton("Add Download");
addButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
actionAdd();
}
});
addPanel.add(addButton);
tableModel= new DownloadsTableModel();
table = new JTable(tableModel);
table.getSelectionModel().addListSelectionListener(new ListSelectionListener(){
public void valueChanged(ListSelectionEvent e){
tableSelectionChanged();
}
});
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
ProgressRenderer renderer= new ProgressRenderer(0, 100);
renderer.setStringPainted(true);
table.setDefaultRenderer(JProgressBar.class, renderer);
table.setRowHeight((int) renderer.getPreferredSize().getHeight());
JPanel downloadsPanel= new JPanel();
downloadsPanel.setBorder(BorderFactory.createTitledBorder("Downloads"));
downloadsPanel.setLayout(new BorderLayout());
downloadsPanel.add(new JScrollPane(table), BorderLayout.CENTER);
JPanel buttonsPanel= new JPanel();
pauseButton= new JButton("Pause");
pauseButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
actionPause();
}
});
pauseButton.setEnabled(false);
buttonsPanel.add(pauseButton);
resumeButton= new JButton("Resume");
resumeButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
actionResume();
}
});
resumeButton.setEnabled(false);
buttonsPanel.add(resumeButton);
cancelButton= new JButton("Cancel");
cancelButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
actionCancel();
}
});
cancelButton.setEnabled(false);
buttonsPanel.add(cancelButton);
clearButton= new JButton("Clear");
clearButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
actionClear();
}
});
clearButton.setEnabled(false);
buttonsPanel.add(clearButton);
getContentPane().setLayout(new BorderLayout());
getContentPane().add(addPanel, BorderLayout.NORTH);
getContentPane().add(downloadsPanel, BorderLayout.CENTER);
getContentPane().add(buttonsPanel, BorderLayout.SOUTH);
}
private void actionExit(){
System.exit(0);
}
private void actionAdd(){
URL verifiedUrl= verifyUrl(addTextField.getText());
if(verifiedUrl!= null){
tableModel.addDownload(new Download(verifiedUrl));
addTextField.setText("");
}else{
JOptionPane.showMessageDialog(this, "Invalid Download UrL", "Error", JOptionPane.ERROR_MESSAGE);
}
}
private URL verifyUrl(String url){
if(!url.toLowerCase().startsWith("http://"))
return null;
URL verifiedUrl= null;
try{
verifiedUrl= new URL(url);
}catch(Exception e){
return null;
}
if(verifiedUrl.getFile().length()<2)
return null;
return verifiedUrl;
}
private void tableSelectionChanged(){
if(selectedDownload!=null)
selectedDownload.deleteObserver(DownloadManager.this);
if(!clearing && table.getSelectedRow()> -1){
selectedDownload= tableModel.getDownload(table.getSelectedRow());
selectedDownload.addObserver(DownloadManager.this);
updateButtons();
}
}
private void actionPause(){
selectedDownload.pause();
updateButtons();
}
private void actionResume(){
selectedDownload.resume();
updateButtons();
}
private void actionCancel(){
selectedDownload.cancel();
updateButtons();
}
private void actionClear(){
clearing= true;
tableModel.clearDownload(table.getSelectedRow());
clearing= false;
selectedDownload= null;
updateButtons();
}
private void updateButtons(){
if(selectedDownload!= null){
int status= selectedDownload.getStatus();
switch(status){
case Download.DOWNLOADING:
pauseButton.setEnabled(true);
resumeButton.setEnabled(false);
cancelButton.setEnabled(true);
clearButton.setEnabled(false);
break;
case Download.PAUSED:
pauseButton.setEnabled(false);
resumeButton.setEnabled(true);
cancelButton.setEnabled(true);
clearButton.setEnabled(false);
break;
case Download.ERROR:
pauseButton.setEnabled(false);
resumeButton.setEnabled(true);
cancelButton.setEnabled(false);
clearButton.setEnabled(true);
break;
default:
pauseButton.setEnabled(false);
resumeButton.setEnabled(false);
cancelButton.setEnabled(true);
clearButton.setEnabled(true);
}
}else{
pauseButton.setEnabled(false);
resumeButton.setEnabled(false);
cancelButton.setEnabled(false);
clearButton.setEnabled(false);
}
}
public void update(Observable o, Object arg){
if(selectedDownload!= null && selectedDownload.equals(o))
updateButtons();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
public void run(){
DownloadManager manager= new DownloadManager();
manager.setVisible(true);
}
});
}
}
For the rest of the classes.. Contact me ;)
