org.ceryle.graph
Class GraphStylesheet

java.lang.Object
  org.ceryle.graph.GraphStylesheet

Direct Known Subclasses:

TMStylesheet

public class GraphStylesheet
extends Object

GraphStylesheet is a static utility class encapsulating various graph display properties, particularly color. This modifies colors in GraphLayoutPanel, GraphNode and GraphEdge.

Since:

JDK1.3

Version:

$Id: GraphStylesheet.java,v 3.6 2007-06-15 12:09:24 altheim Exp $

Author:

Murray Altheim

See Also:

GraphLayoutPanel

Field Summary

protected static String

m_GC

Constructor Summary

GraphStylesheet()

Method Summary

static Color	getColorProperty(PropertyManager pm, String propertyName, String hexDefault) Reads the Color property name from the properties file supplied by the PropertyManager pm, decoding the String hexDefault (which should be a hex value, eg., "#2190ff") should this for some reason fail.
static void	setDefaultColors(PropertyManager pm, GraphPanel gp) Sets the colors used by this GraphStylesheet by reading their names from the property file provided by the PropertyManager pm.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

m_GC

protected static String m_GC

Constructor Detail

GraphStylesheet

public GraphStylesheet()

Method Detail

setDefaultColors

public static void setDefaultColors(PropertyManager pm,
                                    GraphPanel gp)

Sets the colors used by this GraphStylesheet by reading their names from the property file provided by the PropertyManager pm. This also permits re-setting of the maximum label length, from the property "http://purl.org/ceryle/prop/#graph-maxLabelLength". This extends the method in GraphLayoutPanel by providing colors for topic map nodes.

getColorProperty

public static Color getColorProperty(PropertyManager pm,
                                     String propertyName,
                                     String hexDefault)

Reads the Color property name from the properties file supplied by the PropertyManager pm, decoding the String hexDefault (which should be a hex value, eg., "#2190ff") should this for some reason fail. The property value can be in one of three forms:

1. Hex Value: eg., "#2190ff"
2. sRGB Value: eg., "33,144,255"
3. sRGBA (plus alpha) Value: eg., "33,144,255,120"

sRGB and sRGBA values are comprised of integers between 0 and 255. The alpha value determines transparency, with 255 being opaque.