package foo02;

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.KeyEvent;
import javax.swing.*;

@SuppressWarnings("serial")
public class SignIn extends JPanel {
    int txtFieldColumns = 15;
    private JTextField loginField = new JTextField(txtFieldColumns);
    private JPasswordField passwordFieldl = new JPasswordField(txtFieldColumns);
    private JButton submitButton = new JButton("Log in");
    private JLabel loginLabel = new JLabel("   ");
    private JLabel passwordLabel = new JLabel("    ");

    public SignIn() {
        setLayout(new GridBagLayout());
        int ebGap = 5;
        setBorder(BorderFactory.createEmptyBorder(ebGap, ebGap, ebGap, ebGap));

        add(new JLabel("Username:"), getGbc(0, 0));
        add(loginField, getGbc(1, 0));
        add(new JLabel("Password:"), getGbc(0, 1));
        add(passwordFieldl, getGbc(1, 1));

        add(submitButton, getGbc(0, 2, 2));

        add(new JLabel("Login Text: "), getGbc(0, 3));
        add(loginLabel, getGbc(1, 3));
        add(new JLabel("Password: "), getGbc(0, 4));
        add(passwordLabel, getGbc(1, 4));

        submitButton.addActionListener(e -> submit());
        submitButton.setMnemonic(KeyEvent.VK_L);
    }

    private void submit() {
        loginLabel.setText(loginField.getText());
        passwordLabel.setText(new String(passwordFieldl.getPassword()));
    }

    private GridBagConstraints getGbc(int x, int y, int width) {
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.gridx = x;
        gbc.gridy = y;
        gbc.gridwidth = width;
        gbc.fill = GridBagConstraints.HORIZONTAL;

        int ins = 4;
        gbc.insets = new Insets(ins, ins, ins, ins);

        return gbc;
    }

    private GridBagConstraints getGbc(int x, int y) {
        return getGbc(x, y, 1);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            SignIn mainPanel = new SignIn();

            JFrame frame = new JFrame("GUI");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.add(mainPanel);
            frame.pack();
            frame.setLocationRelativeTo(null);
            frame.setVisible(true);
        });
    }

}