monitorpanel.java

Differential Evolution(JAVA)

package DeApp1.panel;

import java.awt.*;         // Import all classes from the java.awt package
                           // AWT is the Abstract Window Toolkit. The AWT
import java.io.*;
import DeApp1.screen.*;     // Import screens


public class MonitorPanel extends Canvas
/***********************************************************
**                                                        **
** Defines the output panel which shows the current data. **
**                                                        **
** Authors:            Mikal Keenan                       **
**                     Rainer Storn                       **
**                                                        **
***********************************************************/
{
  Dimension   minSize; //set the minimum size of the canvas
  
  public final static String genString   = "Generation :  ";
  public final static String evalString  = "Evaluations:  ";
  public final static String valueString = "Minimum    :  ";

  public final static Font DataFont = new Font ("Dialog", Font.PLAIN, 10);

  public DEScreen       deScreen;

  Image    offscreenImage;             // This is where the image is stored
  Graphics offscreenGraphics;

  private int font_height = 10;
  private int gutter      = 5;
  private int new_line    = font_height + gutter;

  private int x  = 5;
  private int y1 = 18;
  private int y2 = y1 + new_line;
  private int y3 = y2 + new_line;

  boolean initialized = false;


  public MonitorPanel (DEScreen app)
  /***************************************
  ** Constructor.                       **
  ***************************************/
  {
	deScreen = app;
    minSize = new Dimension(100,60);  //set minimum size
  }

  public Dimension preferredSize()  
  /******************************************
  ** The layout managers need this.        **
  ******************************************/
  {
     return minimumSize();
  }

  public synchronized Dimension minimumSize() 
  /******************************************
  ** The layout managers need this.        **
  ******************************************/
  {
     return minSize;
  }

  public void paint (Graphics G)
  /******************************************
  ** Paints the current optimization data. **
  ******************************************/
  { // Get the values to display
    Dimension Area = size();

    int width = Area.width;
    int height = Area.height;

	if (! initialized)
    {
	  offscreenImage = createImage (width, height);
	  offscreenGraphics = offscreenImage.getGraphics();
	  initialized = true;
	}

	offscreenGraphics.setColor (deScreen.BACKGROUNDCOLOR);   // Like applet
	offscreenGraphics.fill3DRect (0, 0, width - 1, height - 1, true); // ?
	offscreenGraphics.setColor (Color.blue);                 // Text color
	offscreenGraphics.setFont (new Font("Helvetica",Font.PLAIN,12)); //font                 // Text font
	
	offscreenGraphics.drawString (genString    + deScreen.getGeneration(), x, y1);
	offscreenGraphics.drawString (evalString + deScreen.getEvaluation(), x, y2);
	offscreenGraphics.drawString (valueString  + (float)deScreen.getMinimum(),   x, y3);
                                                 // reduce length of string to (float)
	G.drawImage (offscreenImage, 0, 0, this);     // Display the data panel
  }
}// End class MonitorPanel