GetPassword.java

package javaforce;

/*
 * GetPassword.java
 *
 * Created on August 3, 2007, 1:57 PM
 *
 * @author  pquiring
 */
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import java.awt.event.KeyEvent;

public class GetPassword extends javax.swing.JDialog {

  /**
   * Creates new form GetPassword
   */
  public GetPassword(java.awt.Frame parent, boolean modal) {
    super(parent, modal);
    initComponents();
    setComponentOrientation(((parent == null) ? javax.swing.JOptionPane.getRootFrame() : parent).getComponentOrientation());
    if (parent != null) {
      setLocationRelativeTo(parent);  //doesn't work
    }
    setPosition();
  }

  /**
   * 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.
   */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        label = new javax.swing.JLabel();
        password = new javax.swing.JPasswordField();
        bOk = new javax.swing.JButton();
        bCancel = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
        setTitle("Enter Password");
        setResizable(false);

        label.setText("Password");

        password.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                passwordKeyPressed(evt);
            }
        });

        bOk.setText("OK");
        bOk.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                bOkActionPerformed(evt);
            }
        });

        bCancel.setText("Cancel");
        bCancel.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                bCancelActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(label)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(password, javax.swing.GroupLayout.DEFAULT_SIZE, 148, Short.MAX_VALUE))
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(bOk)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 82, Short.MAX_VALUE)
                        .addComponent(bCancel)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(label)
                    .addComponent(password, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(bOk)
                    .addComponent(bCancel))
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

  private void passwordKeyPressed(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_passwordKeyPressed
    if (evt.getKeyCode() == KeyEvent.VK_ENTER) {
      bOkActionPerformed(null);
    }
    if (evt.getKeyCode() == KeyEvent.VK_ESCAPE) {
      bCancelActionPerformed(null);
    }
  }//GEN-LAST:event_passwordKeyPressed

  private void bCancelActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bCancelActionPerformed
    retValue = null;
    setVisible(false);
  }//GEN-LAST:event_bCancelActionPerformed

  private void bOkActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bOkActionPerformed
    retValue = new String(password.getPassword());
    if (retValue.length() == 0) {
      return;
    }
    setVisible(false);
  }//GEN-LAST:event_bOkActionPerformed
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton bCancel;
    private javax.swing.JButton bOk;
    private javax.swing.JLabel label;
    private javax.swing.JPasswordField password;
    // End of variables declaration//GEN-END:variables
  private String retValue = null;

  public static String getPassword(Frame parent) {
    return getPassword(parent, null);
  }

  public static String getPassword(Frame parent, String prompt) {
    GetPassword dialog = new GetPassword(parent, true);
    if (prompt != null) {
      dialog.label.setText(prompt);
      dialog.pack();
    }
    dialog.setVisible(true);  //does not return until dialog is closed
    return dialog.retValue;
  }

  private void setPosition() {
    Rectangle s = GraphicsEnvironment.getLocalGraphicsEnvironment().getMaximumWindowBounds();
    Dimension d = getPreferredSize();
    setLocation(s.width / 2 - d.width / 2, s.height / 2 - (d.height / 2));
  }
}