Macca

import java.awt.*;import javax.swing.event.*;import javax.swing.*;import window.JWindowFrame;import java.awt.event.*;public class AssignmentOne extends JWindowFrame{	private Container c;	private ActionHandler ah;	private JTextArea textDisplay;	private JCheckBox bold;	private JCheckBox italic;	private JComboBox fontSizeCombo;	private JComboBox fontFaceCombo;	private MenuBar menuBar;	private Menu fileMenu, formatMenu;	private MenuItem exitMenuItem, colourMenuItem;	private Container dlg_c;	private JPanel colorPanel;	private String colorNames[] =	{			"Red: ", "Green: ", "Blue: "	};	private Label labels[] = new Label[3];	private JSlider slider[] = new JSlider[3];	private JButton saveColor;	private JWindowFrame dlg;	public AssignmentOne()	{		c = getContentPane();		ah = new ActionHandler();		GridBagLayout gbLayout = new GridBagLayout();		c.setLayout(gbLayout);		JLabel faceLabel = new JLabel("Font Face: ");		String faceComboLabel[] =		{				"Serif", "SansSerif", "Monospaced"		};		fontFaceCombo = new JComboBox(faceComboLabel);		JLabel sizeLabel = new JLabel("Font Size: ");		String sizeComboLabel[] =		{				"8", "10", "12", "15", "18", "24", "36", "48"		};		fontSizeCombo = new JComboBox(sizeComboLabel);		bold = new JCheckBox("Bold");		italic = new JCheckBox("Italic");		textDisplay = new JTextArea("The quick brown fox jumps over the lazy dog");		textDisplay.setEditable(true);		textDisplay.setLineWrap(true);		menuBar = new MenuBar();		fileMenu = new Menu("File");		formatMenu = new Menu("Format");		fileMenu.add(exitMenuItem = new MenuItem("Exit"));		exitMenuItem.addActionListener(ah);		formatMenu.add(colourMenuItem = new MenuItem("Set Colour"));		colourMenuItem.addActionListener(ah);		menuBar.add(fileMenu);		menuBar.add(formatMenu);		setMenuBar(menuBar);		fontFaceCombo.addActionListener(ah);		fontSizeCombo.addActionListener(ah);		bold.addActionListener(ah);		italic.addActionListener(ah);		// add components to grid		GridBagConstraints constraints = new GridBagConstraints();		// do not fill up the entire area		constraints.fill = GridBagConstraints.NONE;		// position permanently in the east side		constraints.anchor = GridBagConstraints.EAST;		// the labels remain a constant width when the window is resize		constraints.weightx = 0;		constraints.weighty = 0;		addConstraints(faceLabel, constraints, 0, 0, 1, 1);		addConstraints(sizeLabel, constraints, 0, 1, 1, 1);		// combo box to expand horizontal in the grid		constraints.fill = GridBagConstraints.HORIZONTAL;		constraints.weightx = 0;		constraints.weighty = 0;		addConstraints(fontFaceCombo, constraints, 1, 0, 1, 1);		addConstraints(fontSizeCombo, constraints, 1, 1, 1, 1);		constraints.fill = GridBagConstraints.NONE;		constraints.anchor = GridBagConstraints.CENTER;		constraints.weightx = 0;		constraints.weighty = 100;		addConstraints(bold, constraints, 0, 2, 2, 1);		addConstraints(italic, constraints, 0, 3, 2, 1);		constraints.fill = GridBagConstraints.BOTH;		constraints.weightx = 100;		constraints.weighty = 0;		addConstraints(textDisplay, constraints, 2, 0, 1, 4);		setTitle("GridBagLayout Demo");		setSize(400, 300);		setVisible(true);	}	public void addConstraints(Component comp, GridBagConstraints constraints, int x, int y, int w, int h)	{		constraints.gridx = x;		constraints.gridy = y;		constraints.gridwidth = w;		constraints.gridheight = h;		c.add(comp, constraints);	}	public static void main(String args[])	{		new AssignmentOne();	}	public class ActionHandler implements ActionListener, ChangeListener	{		public void actionPerformed(ActionEvent e)		{			if (e.getSource() == exitMenuItem)			{				System.exit(0);			}			else if (e.getSource() == colourMenuItem)			{				if (dlg == null)				{					dlg = new JWindowFrame();					dlg_c = dlg.getContentPane();					JPanel sliderPanel = new JPanel();					sliderPanel.setLayout(new GridLayout(0, 1));					for (int i = 0; i < 3; i++)					{						labels[i] = new Label(colorNames[i] + 255);						sliderPanel.add(labels[i]);						slider[i] = new JSlider(SwingConstants.HORIZONTAL, 0, 255, 255);						slider[i].setMinorTickSpacing(10);						slider[i].setMajorTickSpacing(50);						slider[i].setPaintTicks(true);						slider[i].setPaintLabels(true);						sliderPanel.add(slider[i]);						slider[i].addChangeListener(this);					}					dlg_c.add(sliderPanel, BorderLayout.NORTH);					colorPanel = new JPanel();					colorPanel.setBackground(textDisplay.getForeground());					dlg_c.add(colorPanel, BorderLayout.CENTER);					saveColor = new JButton("Accept");					saveColor.addActionListener(ah);					dlg_c.add(saveColor, BorderLayout.SOUTH);					dlg.setSize(500, 450);					dlg.setTitle("Slider Demo");				}				dlg.setVisible(true);			}			else if (e.getSource() == saveColor)			{				textDisplay.setForeground(new Color(slider[0].getValue(), slider[1].getValue(), slider[2].getValue()));				dlg.setVisible(false);			}			else			{				int fontStyle = Font.PLAIN;				String fontFace = fontFaceCombo.getSelectedItem().toString();				int fontSize = Integer.parseInt(fontSizeCombo.getSelectedItem().toString());				if (bold.isSelected())					fontStyle += Font.BOLD;				if (italic.isSelected())					fontStyle += Font.ITALIC;				textDisplay.setFont(new Font(fontFace, fontStyle, fontSize));			}		}		public void stateChanged(ChangeEvent e)		{			for (int i = 0; i < 3; i++)				// slider component getValue method returns the slider value				labels[i].setText(colorNames[i] + slider[i].getValue());			// setting the colorPanel background using the RGB value			colorPanel.setBackground(new Color(slider[0].getValue(), slider[1].getValue(), slider[2].getValue()));		}	}}