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

public class GridBagLayout1 extends Applet {
  private Button formatButton;
  FormatDialog formatDialog;

  public void init() {
    formatButton = new Button("Text Format");
    add(formatButton);
  }

  public boolean action(Event evt, Object arg) {
    if (arg.equals("Text Format")) {
      formatDialog = new FormatDialog("Text Format Dialog");
    }
    else return super.action(evt,arg);
    return true;
  }
}

class FormatDialog extends Frame {
  private List style;
  private Checkbox bold;
  private Checkbox italic;
  private TextField size;
  private TextArea sample;
  
  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);

    bold = new Checkbox("Bold");
    italic = new Checkbox("Italic");
    Label label = new Label("Size ");
    size = new TextField("14");
    size.setEditable(false);
    sample = new TextArea(4,20);
     
    GridBagConstraints gbc = new GridBagConstraints();
    gbc.fill = GridBagConstraints.BOTH;
    gbc.weightx = 20;
    gbc.weighty = 100;
    add(style, gbl, gbc, 0, 0, 1, 3);
    gbc.weightx = 100;
    gbc.fill = GridBagConstraints.NONE;
    gbc.anchor = GridBagConstraints.CENTER;
    add(bold, gbl, gbc, 1, 0, 2, 1);
    add(italic, gbl, gbc, 1, 1, 2, 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............");
    resize(350,200);
    show();
  }

  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 boolean handleEvent(Event evt) {
    if ((evt.target.equals(bold) || evt.target.equals(italic)
	 || evt.target.equals(style))) {
      int i = (bold.getState() ? Font.BOLD : 0) + 
        (italic.getState() ? Font.ITALIC : 0);
      int fontSize = Integer.valueOf(size.getText()).intValue();
      sample.setFont(new Font(style.getSelectedItem(), i, fontSize));
      sample.setText(" Style: " + style.getSelectedItem() + 
		     "\n Bold: " + bold.getState() + 
		     "\n Italic: " + italic.getState());
      sample.show();
    }
    else if (evt.id == Event.WINDOW_DESTROY) hide();
    return super.handleEvent(evt);
  }
}