DialogSeparator.java Source code

Introduction

Here is the source code for DialogSeparator.java

Source

import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTextField;

public class DialogSeparator extends JLabel {
    public static final int OFFSET = 15;

    public DialogSeparator() {
    }

    public DialogSeparator(String text) {
        super(text);
    }

    public Dimension getPreferredSize() {
        return new Dimension(getParent().getWidth(), 20);
    }

    public Dimension getMinimumSize() {
        return getPreferredSize();
    }

    public Dimension getMaximumSize() {
        return getPreferredSize();
    }

    public void paint(Graphics g) {
        g.setColor(getBackground());
        g.fillRect(0, 0, getWidth(), getHeight());

        Dimension d = getSize();
        int y = (d.height - 3) / 2;
        g.setColor(Color.white);
        g.drawLine(1, y, d.width - 1, y);
        y++;
        g.drawLine(0, y, 1, y);
        g.setColor(Color.gray);
        g.drawLine(d.width - 1, y, d.width, y);
        y++;
        g.drawLine(1, y, d.width - 1, y);

        String text = getText();
        if (text.length() == 0)
            return;

        g.setFont(getFont());
        FontMetrics fm = g.getFontMetrics();
        y = (d.height + fm.getAscent()) / 2;
        int fontWidth = fm.stringWidth(text);

        g.setColor(getBackground());
        g.fillRect(OFFSET - 5, 0, OFFSET + fontWidth, d.height);

        g.setColor(getForeground());
        g.drawString(text, OFFSET, y);
    }

    public static void main(String argv[]) {
        new FlightReservation();
    }
}

class FlightReservation extends JFrame {
    public FlightReservation() {
        super("Dialog ");

        Container c = getContentPane();
        c.setLayout(new FlowLayout());
        c.add(new DialogSeparator("Options"));

        ButtonGroup group = new ButtonGroup();
        JRadioButton r1 = new JRadioButton("First class");
        group.add(r1);
        c.add(r1);

        JRadioButton r2 = new JRadioButton("Business");
        group.add(r2);
        c.add(r2);

        JRadioButton r3 = new JRadioButton("Coach");
        group.add(r3);
        c.add(r3);

        c.add(new DialogSeparator());

        JButton b3 = new JButton("Exit");
        c.add(b3);

        WindowListener wndCloser = new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        };
        addWindowListener(wndCloser);

        setSize(300, 200);
        setVisible(true);
    }
}