bloggui.java

Graphical user interface example from class 2006

package applet;
/**
 * This example shows how we can reduce the previous example (ex1) to one class. 
 */
import javax.swing.*;
import java.awt.*;    // required for Dimension

public class BlogGUI extends JPanel {
	public static final int WIDTH = 400;
	public static final int HEIGHT = 300;
	private static final long serialVersionUID = 8016418091174982986L;
	private JFrame frame;
	private String title = "My Blog";
		
	public BlogGUI() {
		setOpaque(true);
		
		/* Name label and text field */
		JLabel nameLabel = new JLabel("Name:");
		int nameFieldLength = 10;
		JTextField nameTextField = new JTextField(nameFieldLength);
		add(nameLabel);
		add(nameTextField);
		
		/* Age label and text field */
		JLabel dateLabel = new JLabel("Date: ");
		int dateFieldLength = 5;
		JTextField dateTextField = new JTextField(dateFieldLength);
		
		/* Adding the elements to the panel */
		add(dateLabel);
		add(dateTextField);
		
		/* Text Area to type info */
		JTextArea textArea = new JTextArea();
		textArea.setEditable(true);
		
		/* Adding scroll bar capabilities to output area */
		/* NOTE: Scroll bars will appear after typing several lines */
		JScrollPane scrollPane = new JScrollPane(textArea);
		int width = 350, height = 200;
		scrollPane.setPreferredSize(new Dimension(width, height));
		/* Setting the size of the scroll area */
		
		/* Adding the scrollPane to the panel */
		add(scrollPane);
		
		/* Adding a check box */
		JCheckBox familyCheckBox = new JCheckBox("Family");
		add(familyCheckBox);
		
		JCheckBox allCheckBox = new JCheckBox("All");
		add(allCheckBox);
		
		/* Adding Post button */
		JButton postButton = new JButton("Post");
		add(postButton);	
	}

	public void defineFrame() {
		/* Frame to hold the panel */
		frame = new JFrame(title);
	    frame.setContentPane(this); // adds the panel 
	    frame.setSize(new Dimension(WIDTH, HEIGHT));

	    /* Some work to centralize the frame */
	    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
	    // Upper left corner
	    int upperLeftCornerX = (screenSize.width - frame.getWidth()) / 2;
	    int upperLeftCornerY = (screenSize.height - frame.getHeight()) / 2;
	    frame.setLocation(upperLeftCornerX, upperLeftCornerY);
	    
	    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
	    frame.setVisible(true);	
	}
	
	public static void main(String[] args) {
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				new BlogGUI().defineFrame();
			}
		});
	}
	
	/* Static block for feel and look.  Comment this   */
	/* block out to see how the feel and look changes. */
	static {
		try {
			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		} catch (Exception e) {
			System.out.println(e.getMessage());
		}
	}
}