package com.power.util.Message;/** * <p>Title: PIPE Engine</p> * <p>Description: Global Planning Optimization Engine</p> * <p>Copyright: Copyright (c) 2002</p> * <p>Company: Paraster, Inc.</p> * @author Wei Tan * @version 1.0 */import java.awt.*;import javax.swing.*;import java.util.ResourceBundle;import com.power.pipeengine.*;/** * ObjectiveValue is a one line JPanel that displays current iteration number * and objective value from the LP engine. It has a label and a field for the * iteration and objective value. * It is a singular class. */public class ObjectiveValuePanel extends JPanel {  static ResourceBundle res = ResourceBundle.getBundle("com.power.util.Res",                                                          EngineConfig.getInstance().getLocale() );  private JLabel _objValueLabel = new JLabel( res.getString("Objective_Value_") );  //Use JTextField to display current objective value  //Set the field to hold objective value with 4 columns.  private JTextField _objValueField = new JTextField( 20 );  //Objective value is to be displayed as a string  private String _objValueStr = "";  private JLabel _iterNumLabel = new JLabel( res.getString("Iteration_") );  private JTextField _iterNumField = new JTextField( 5 );  private String _iterNumStr = "";  //Runnable is used to update the _objValueField on the event dispatch thread.  private Runnable runnable;  private static final ObjectiveValuePanel INSTANCE =                              new ObjectiveValuePanel();  /**   * class constructor   */  private ObjectiveValuePanel() {    init();  }  /**   * Gets the global instance of the singular class object.   * @return the global instance.   */  public static ObjectiveValuePanel getInstance( ) {        return INSTANCE;  }  //initialize the class  private void init() {    _objValueField.setEditable( false );    //_objValueField.setSize( new Dimension( 200, 30 ) );    _iterNumField.setEditable( false );    this.setLayout( new FlowLayout() );    this.add( _iterNumLabel );    this.add( _iterNumField );    this.add( _objValueLabel );    this.add( _objValueField );    runnable = new Runnable() {      public void run() {        _iterNumField.setText( _iterNumStr );        _objValueField.setText( _objValueStr );      }    };  }  /**   * Sets the global objective value for display at every 50 iterations and   * refresh the JTextField.   * @param value the current objective value to be displayed.   */  public void setObjectiveValue( int iterNum, double value ) {    _iterNumStr = Integer.toString( iterNum );    _objValueStr = Double.toString( value );    //refresh the JTextField after the _objValueStr being set.    try {      SwingUtilities.invokeLater( runnable );    } catch (Exception e ) {}  }}