// TextFrame.java -- text i/o frame
//
//

import java.awt.*;
import java.io.*;


public class TextFrame extends Object {

  TextArea textout;
  TextField textin;
  CloseTextButton button;
  Frame frame;
  
  public TextFrame (String title) {

    // create the frame
    frame = new Frame (title);
    frame.setLayout (new FlowLayout ());
    frame.resize (700, 400);

    // set up the text output ares
    textout = new TextArea (10, 70);
    textout.setEditable (false);
    frame.add (textout);

    // set up the text input area
    textin = new EnterTextField (this);
    frame.add (textin);

    // set up the close button
    button = new CloseTextButton (this);
    frame.add (button);

    // show the frame
    frame.show ();
    }

  public void close () {
    frame.dispose ();
    }

  // accessors for text fields
  void print (String s) {
    textout.appendText (s);
    }

  String read () {
    String result = textin.getText ();
    textin.setText ("");
    return result + "\n";
    }

  // input hook; override this 
  public void notifyInput (String s) {
    }

  // close hook; override this
  public void notifyClose () {
    }
  }



class EnterTextField extends TextField {

  TextFrame parent;

  EnterTextField (TextFrame p) {
    super (72);
    setEditable (true);
    parent = p;
    }

  public boolean action (Event e, Object w) {
    parent.notifyInput (parent.read ());
    return true;
    }
  }


class CloseTextButton extends Button {

  TextFrame parent;

  CloseTextButton (TextFrame p) {
    super ("Close");
    parent = p;
    }

  public boolean action (Event e, Object w) {
    parent.notifyClose ();
    return true;
    }
  }