colorutil.java

MPICH是MPI的重要研究,提供了一系列的接口函数,为并行计算的实现提供了编程环境.

import java.awt.Color;
import java.io.*;
import java.util.*;

/*
  This class interprets X Colors as java colors specified with R-G-B values
  1. The file containing all the X Colors is specified by the Mainwin object
     and its File object is passed onto this object. 
  2. The static method readColors then traverses through this file. 
     The method expects the file to have the following format. 
     Every color should be in a unique line.
     [red value] [green value] [blue value]     [color name]
         .             .             .                .
  3. The colors alongwith their rgb values are read and a Vector 'colors' of
     CLOG_COLOR objects is formed.
  4. Whenever an X Color name is read during the reading of the slog file
     its corresponding rgb value is obtained from getColor () method. If an
     unrecognized color is sought a default color is returned. Only those colors
     specified in the COLOR FILE ARE VALID, the rest being INVALID.
*/
class ColorUtil
{
  public static Mainwin parent;
  public static Vector colors;   //Vector of CLOG_COLOR objects containing X based colors
                                 //and the corresponding rgb values
  public static Color defColor;  //default Color to be returned if no X matching color found
  /*
  public static File colorFile; //Name of the file containing X based colors
  */

  //This part will be executed as soon as program is run
  static {
    colors = new Vector ();
    defColor = Color.pink;
  }
  
  //this method will read X Colors from the specified file.
  //file = pointer to file containing X based colors in the correct format
  public static void readColors (Mainwin p, InputStream in) {
    if (in == null) return;
    
    parent = p;
    InputStreamReader rd = new InputStreamReader (in);
    BufferedReader block = new BufferedReader (rd);
    String s;
    
    try {
      while ((s = block.readLine ()) != null) {
        StringTokenizer tokens = new StringTokenizer (s);
        int r = (Integer.valueOf (tokens.nextToken ())).intValue ();
        int g = (Integer.valueOf (tokens.nextToken ())).intValue ();
        int b = (Integer.valueOf (tokens.nextToken ())).intValue ();
        String name = new String (tokens.nextToken ());
        int extra = tokens.countTokens ();
        if (extra > 0) {
          for (int i = 0; i < extra; i++) {
            String next = tokens.nextToken ();
            name += " ";
            name += next;
          }
        }
        colors.addElement (new CLOG_COLOR (name, new Color (r, g, b)));
      }
      in.close ();
    }
    catch (IOException x) {
      new ErrorDialog (parent, "IOException occured while reading colorfile");
    }
  }

  //this method returns a java.awt.Color object for the given string specifying
  //a X based color
  //name = the name of the X based color
  public static Color getColor (String name) {
    if (colors.size () > 0) {
      Enumeration enum = colors.elements ();
      while (enum.hasMoreElements ()) {
	CLOG_COLOR c = (CLOG_COLOR)enum.nextElement ();
	int len = name.indexOf (':');
	if (len == -1) len = name.length ();
	if (c.name.regionMatches (0, name, 0, len) && (c.name.length () == len)) {
	  return c.color;
	}
      }    
    }
    new ErrorDialog (parent, "Color " + name + " cound not be found "
                           + "in Jumpshot.colors. " + defColor.toString()
                           + "is returned instead" );
    return defColor;
  }
}  
//------------------------------------------------------------------------------------

//this class specifies a CLOG_COLOR object 
class CLOG_COLOR {
  public String name;
  public Color color;
  
  //Constructor
  public CLOG_COLOR (String n, Color c) {
    name = n;
    color = c;
  }
}