LoginFrame.java

package music.gui;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

import util.Constants;

import music.search.GoogleMusicSearcher;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * LoginFrame.java
 *
 * Created on Nov 14, 2010, 3:44:57 PM
 */

/**
 *
 * @author liutao
 */
public class LoginFrame extends javax.swing.JFrame {

    /** Creates new form LoginFrame */
    public LoginFrame() {
        initComponents();
        setTitle("Login");
        setResizable(false);
        setLocation(400, 400);
        setVisible(true);
        
    }

    // check where to put download file
    public void init()
	{	
    	
    	JFileChooser chooser = new JFileChooser();
    	chooser.setDialogTitle("choose download directory");
		chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
		chooser.setAcceptAllFileFilterUsed(false);
    	chooser.showOpenDialog(this);
		
		
		File file = chooser.getSelectedFile();
		if(file != null)
		{
			if(!file.canRead() || !file.canWrite())
			{
				JOptionPane.showMessageDialog(this, "permission denied");
				return ;	
			}
			//System.out.println(file.getAbsolutePath());
			Constants.DOWNLOAD_DIR = file.getAbsolutePath()+"/";
			run();
		}
	
	}
    
    public void run()
    {
    	MyFrame frame = new MyFrame();
		frame.setMusicSearcher(new GoogleMusicSearcher());
		frame.setLocation(300,300);
		frame.setVisible(true);
    }
     
    
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        passwdField = new javax.swing.JPasswordField();
        nameField = new javax.swing.JTextField();
        okButton = new javax.swing.JButton();
        notifyLabel = new javax.swing.JLabel();

        //setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        jLabel1.setText("Username");

        jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        jLabel2.setText("Password");

        passwdField.setFont(new java.awt.Font("DejaVu Sans", 0, 14)); // NOI18N
        passwdField.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                passwdFieldActionPerformed(evt);
            }
        });

        nameField.setFont(new java.awt.Font("DejaVu Sans", 0, 14)); // NOI18N

        okButton.setText("OK");
        okButton.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent arg0)
			{
				if(nameField.getText().equals("abc") && passwdField.getText().equals("abc"))
				{
					 init();
					 dispose();
				}
				else
					notifyLabel.setText("name or passwd error!");
			}
		});
        
        notifyLabel.setForeground(new java.awt.Color(211, 48, 58));
        
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(85, 85, 85)
                        .addComponent(okButton, javax.swing.GroupLayout.PREFERRED_SIZE, 78, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(21, 21, 21)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 72, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(nameField, javax.swing.GroupLayout.PREFERRED_SIZE, 129, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                            .addGroup(layout.createSequentialGroup()
                                .addComponent(jLabel2)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(passwdField, javax.swing.GroupLayout.PREFERRED_SIZE, 115, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addGap(26, 26, 26))))
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(notifyLabel, javax.swing.GroupLayout.PREFERRED_SIZE, 180, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {jLabel1, jLabel2});

        layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {nameField, passwdField});

        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(notifyLabel, javax.swing.GroupLayout.PREFERRED_SIZE, 15, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(nameField, javax.swing.GroupLayout.PREFERRED_SIZE, 29, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 12, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(passwdField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addComponent(okButton)
                .addContainerGap())
        );

        layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {jLabel1, jLabel2});

        layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {nameField, passwdField});

        pack();
    }// </editor-fold>

    private void passwdFieldActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
    }

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        new LoginFrame();
    }

    // Variables declaration - do not modify
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel notifyLabel;
    private javax.swing.JTextField nameField;
    private javax.swing.JButton okButton;
    private javax.swing.JPasswordField passwdField;
    // End of variables declaration

}