[graphl-cvs] graphl/src/org/mediavirus/util ParseUtils.java

[Flo L. <fl...@us...>]

Update of /cvsroot/graphl/graphl/src/org/mediavirus/util
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv18139/src/org/mediavirus/util

Added Files:
	ParseUtils.java 
Log Message:
* added width and height properties to the Node interface, to allow layouters to define a bounding box for nodes.
* AbsoluteNodeLayouter will also use bounding box information for maps etc. This is currently only used in imageNodePainter
* added DirectedEdgeLayouter for laying out hierarchical and directed graphs like trees. this works nice for rdf schemas et al.
* Added ShapeNodePainter to draw labels as java2d shapes (currently predefined: circle, square, cross and X). No label yet.
* using JavaBeans/property pages for facet configuration. added a dependency to com.l2fprod package, implementing paroperty sheets - i want to get rid of this again in the future, but i don't have time currently to implement such bullshit that should be in the jdk anyhow
* Added a StrokeChooser for defining strokes for node and edgepainters
* added a ParseUtils class for parsing colors and strokes from literals
* greatly extended default configuration for facets
* some documentation updates (javadoc runs without warnings now)

--- NEW FILE: ParseUtils.java ---
/*
 * Created on 01.10.2004 by Flo Ledermann <led...@im...>
 */
 
package org.mediavirus.util;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Stroke;
import java.util.StringTokenizer;

/**
 * @author Flo Ledermann <led...@im...>
 * created: 01.10.2004 21:56:43
 */
public class ParseUtils {

	public static Color parseColor(String colstr) {
		Color col = null;
		if (colstr != null) {
			colstr = colstr.substring(1);
			int colval = Integer.parseInt(colstr, 16);
			col = new Color(colval);
		}
		return col;
	}

    /**
     * @param str A String that contains a Stroke definition in the following format:
     * a float value indicating the line width, followed by 0-6 int values, defining
     * the stroke pattern. @see java.awt.BasicStroke
     * @return A Stroke that matches the definition in str, or null if the definition
     * could not be parsed.
     */
    public static Stroke parseStroke(String str) {
        if (str != null) {
            float width;
            StringTokenizer tok = new StringTokenizer(str);
            try {
                width = Float.parseFloat(tok.nextToken());
            }
            catch (NumberFormatException ex){
                return null;
            }
            int i=0;
            int[] p = new int[6];
            while (i<6 && tok.hasMoreTokens()) {
                try {
                    p[i] = Integer.parseInt(tok.nextToken());
                    i++;
                }
                catch (NumberFormatException e) {
                }
            }
            float[] pattern;
            
            if (i == 6)
                pattern = new float[] { p[0],p[1],p[2],p[3],p[4],p[5] };
            else if (i > 3)
                pattern = new float[] { p[0],p[1],p[2],p[3] };
            else if (i > 1)
                pattern = new float[] { p[0],p[1] };
            else if (i == 1)
                pattern = new float[] { p[0] };
            else return new BasicStroke(width);

            return new BasicStroke(width,BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 1.0f, pattern, 0.0f);
        }
        
        return null;
    }

}