More on the TextField Question

Here is more detail on my textfield question.

The program is given below:

In it the method Constraint(), just provide a position on
the panel.

What happends is the textfiled will show on the panel,
and when I click on it, it does recognize as an event.
event.targer = textfield1; but I can not enter any thing
in the textfield.  I wonder what happens.

P.S. The points on the other one will also be given
if you can help me.  Thank you.:
import java.io.*;
import java.awt.*;
import java.util.*;

public class EditLogin extends Frame {
      String temp,temp1,temp2,temp3,temp4;
      TextField textfield1;
      
      Panel panel1;
      GridBagLayout gridbag = new GridBagLayout();

      public EditLogin(String title)
      {
        super(title);

        panel1 = new Panel();
        panel1.setLayout(gridbag);

        textfield1 = new TextField(10);

        constrain(panel1,textfield1,0,5,1,1);

        this.setLayout(gridbag);
        constrain(this,panel1,0,0,1,1,GridBagConstraints.VERTICAL,
              GridBagConstraints.NORTHWEST,0.0,1.0,10,10,5,5);


      }

      public boolean handleEvent(Event event)
      {
      
            if (event.target == textfield1)
            { textarea.setText("Entering Text\n");
              temp1 = textfield1.getText();
              textarea.appendText(astring+"\n");
            }

            return true;
      }  
 

      public void constrain(Container container, Component component,
                  int grid_x, int grid_y, int grid_width, int grid_height,
                  int fill, int anchor, double weight_x, double weight_y,
                  int top, int left, int bottom, int right)
    {
        GridBagConstraints c = new GridBagConstraints();
        c.gridx = grid_x; c.gridy = grid_y;
        c.gridwidth = grid_width; c.gridheight = grid_height;
        c.fill = fill; c.anchor = anchor;
        c.weightx = weight_x; c.weighty = weight_y;
        if (top+bottom+left+right > 0)
            c.insets = new Insets(top, left, bottom, right);
       
        ((GridBagLayout)container.getLayout()).setConstraints(component, c);
        container.add(component);
    }
   
    public void constrain(Container container, Component component,
                  int grid_x, int grid_y, int grid_width, int grid_height) {
        constrain(container, component, grid_x, grid_y,
              grid_width, grid_height, GridBagConstraints.NONE,
              GridBagConstraints.CENTER, 0.0, 0.0, 0, 0, 0, 0);
    }
   
    public void constrain(Container container, Component component,
                  int grid_x, int grid_y, int grid_width, int grid_height,
                  int top, int left, int bottom, int right) {
        constrain(container, component, grid_x, grid_y,
              grid_width, grid_height, GridBagConstraints.NONE,
              GridBagConstraints.CENTER,
              0.0, 0.0, top, left, bottom, right);
    }

      public static void main(String[] args) {
            Frame editlog = new EditLogin("Edit Login");
            editlog.pack();
            editlog.show();
      }
}