objectivevaluepanel.java

著名IT公司ILog的APS高级排产优化引擎

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 ) {}
  }

}