Example usage for javax.swing JTextField addAncestorListener

Introduction

In this page you can find the example usage for javax.swing JTextField addAncestorListener.

Prototype

public void addAncestorListener(AncestorListener listener) 

Source Link

Document

Registers listener so that it will receive AncestorEvents when it or any of its ancestors move or are made visible or invisible.

Usage

From source file:uk.ac.ucl.cs.cmic.giftcloud.restserver.GiftCloudLoginDialog.java

public PasswordAuthentication getPasswordAuthentication(final String prompt) {
    // Set the default background colour to white
    UIManager UI = new UIManager();
    UI.put("OptionPane.background", Color.white);
    UI.put("Panel.background", Color.white);

    String defaultUserName = "";
    if (giftCloudProperties.getLastUserName().isPresent()) {
        defaultUserName = giftCloudProperties.getLastUserName().get();
    }// w  ww  .  j  a  v a  2 s  .c  o m

    // Create a panel for entering username and password
    final JPanel usernamePasswordPanel = new JPanel(new GridBagLayout());

    final JLabel promptField = new JLabel(prompt, SwingConstants.CENTER);
    final JTextField usernameField = new JTextField(defaultUserName, 16);
    final JPasswordField passwordField = new JPasswordField(16);

    // Add a special listener to get the focus onto the username field when the component is created, or password if the username has already been populated from the default value
    if (StringUtils.isBlank(defaultUserName)) {
        usernameField.addAncestorListener(new RequestFocusListener());
    } else {
        passwordField.addAncestorListener(new RequestFocusListener());
    }

    usernamePasswordPanel.add(promptField, promptConstraint);
    usernamePasswordPanel.add(new JLabel("Username:"), labelConstraint);
    usernamePasswordPanel.add(usernameField, fieldConstraint);
    usernamePasswordPanel.add(new JLabel("Password:"), labelConstraint);
    usernamePasswordPanel.add(passwordField, fieldConstraint);

    // Show the login dialog
    final int returnValue = JOptionPane.showConfirmDialog(new JDialog(getFrame(parent)), usernamePasswordPanel,
            LOGIN_DIALOG_TITLE, JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, icon);

    if (JOptionPane.OK_OPTION == returnValue) {
        giftCloudProperties.setLastUserName(usernameField.getText());
        giftCloudProperties.setLastPassword(passwordField.getPassword());
        giftCloudProperties.save();

        return new PasswordAuthentication(usernameField.getText(), passwordField.getPassword());
    } else {
        return null;
    }
}

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