package org.rosuda.JGR.rhelp;
/*============================================================================

  Project:

  JAVA Source file for the class Tracer

  COPYRIGHT (C), 1998-2000, Thomas Baier, R Core development Team

 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

============================================================================*/


import java.awt.*;

/**
 *	Tracer.java from R-project 
 */

public class Tracer extends Frame
{
  public static void write (String string)
  {
    //create a trace window
    /*
    if (cTracer == null) {
      cTracer = new Tracer ();
    }

    cTracer._write (string);
    */
    return;
  }

  public static void start ()
  {
    /*
    if (cTracer != null) {
      cTracer.show ();
    }
    */
    return;
  }

  public static void stop ()
  {
    //    if (cTracer != null) {
    //  cTracer.setVisible (false);
    //}

    return;
  }

  private Tracer ()
  {
    super ("Java Applet Tracer");

    // construct a layout manager
    GridBagLayout gridbag = new GridBagLayout ();
    GridBagConstraints constraints = new GridBagConstraints ();
    setLayout (gridbag);
    constraints.fill = GridBagConstraints.BOTH;
    constraints.weighty = 1.0;
    constraints.weightx = 1.0;
    constraints.gridwidth = GridBagConstraints.REMAINDER;
    constraints.gridheight = GridBagConstraints.REMAINDER;

    iOutput = new TextArea ();

    gridbag.setConstraints (iOutput,constraints);
    add (iOutput);

    show ();
    pack ();

    return;
  }


  private void _write (String string)
  {
    iOutput.append (string);

    return;
  }

  private TextArea iOutput;
  private static Tracer cTracer = null;
}

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