// File:  GridBagLayout1.java

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class GridBagLayout1 extends Applet {
  private Button formatButton;
  public void init() {
    formatButton = new Button("Text Format");
    formatButton.addActionListener(new ButtonHandler());
    add(formatButton);
  }
}

class ButtonHandler implements ActionListener 
{
  FormatDialog formatDialog;
  public ButtonHandler(){}
  public void actionPerformed(ActionEvent e)  {
    formatDialog = new FormatDialog("Text Format Dialog");
  }
}

class FormatDialog extends Frame implements ActionListener, ItemListener{
  private List style;
  private Checkbox bold;
  private Checkbox italic;
  private TextField size;
  private TextArea sample;
  private Button quit;
  
  FormatDialog(String title) {
    super(title);
    GridBagLayout gbl = new GridBagLayout();
    setLayout(gbl);

    style = new List(3, false);
    style.addItem("Courier");
    style.addItem("Dialog");
    style.addItem("DialogInput");
    style.addItem("Helvetica");
    style.addItem("Times Roman");
    style.addItem("Zapf Dingbats");
    style.select(0);
    style.addItemListener(this);
    

    bold = new Checkbox("Bold");
    bold.addItemListener(this);
    italic = new Checkbox("Italic");
    italic.addItemListener(this);
    
    Label label = new Label("Size ");
    size = new TextField("14");
    size.setEditable(false);
    sample = new TextArea(4,20);
    
    quit=new Button("QUIT");
    quit.addActionListener(this);
    quit.setBackground( Color.blue );
    quit.setForeground( Color.white ); 
    quit.setFont(new Font("SansSerif", Font.BOLD,10));
    GridBagConstraints gbc = new GridBagConstraints();
    gbc.fill = GridBagConstraints.BOTH;
    gbc.weightx = 20;
    gbc.weighty = 100;
    add(style, gbl, gbc, 0, 0, 1, 3);
    add(quit,gbl, gbc,2,0,1,2);
    gbc.weightx = 100;
    gbc.fill = GridBagConstraints.NONE;
    gbc.anchor = GridBagConstraints.CENTER;
    add(bold, gbl, gbc, 1, 0, 1, 1);
    add(italic, gbl, gbc, 1, 1, 1, 1);
    add(label, gbl, gbc, 1, 2, 1, 1);
    
    gbc.fill = GridBagConstraints.HORIZONTAL;
    add(size, gbl, gbc, 2, 2, 1, 1);
    gbc.anchor = GridBagConstraints.SOUTH;
    gbc.weighty = 0;
    add(sample, gbl, gbc, 0, 10, 10, 0);
    sample.setText("This is the default font attributes............");
    setSize(350,200);
    setVisible(true);
  }

  private void add(Component c, GridBagLayout gbl, GridBagConstraints gbc, 
                   int x, int y, int w, int h) {
    gbc.gridx = x;
    gbc.gridy = y;
    gbc.gridwidth = w;
    gbc.gridheight = h;
    gbl.setConstraints(c, gbc);
    add(c);
  }
  public void actionPerformed( ActionEvent e) {
    if (e.getSource()==quit)
      dispose();
  }
  
  public void itemStateChanged(ItemEvent e) 
  {
    int valBold= (bold.getState() ? Font.BOLD: Font.PLAIN);
    int valItalic=(italic.getState() ? Font.ITALIC: Font.PLAIN);
    int fontSize = Integer.valueOf(size.getText()).intValue();
    sample.setFont(new Font(style.getSelectedItem(), valBold+valItalic, fontSize));
    sample.setText(" Style: " + style.getSelectedItem() + 
		     "\n Bold: " + bold.getState() + 
		     "\n Italic: " + italic.getState());
    sample.setVisible(true);
  }
}