package com.softwarematch.workflow;import java.awt.Color;import java.awt.Component;import java.awt.Graphics;import java.awt.Rectangle;import java.awt.geom.Point2D;import org.jgraph.JGraph;import org.jgraph.graph.CellView;import org.jgraph.graph.DefaultGraphModel;import org.jgraph.graph.VertexRenderer;/** * Renderer for grouped cells, includes '+' '-' to expand/collapse */public class JGraphGroupRenderer extends VertexRenderer {	/**	 * Default handle bounds for renderer, '+' or '-'	 */	public static Rectangle handle = new Rectangle(0, 0, 7, 7);	/**	 * Specifies whether the current view is a rich text value, and if the image	 * should be stretched.	 */	protected boolean isGroup = false;	/**	 * Holds the background and foreground of the graph.	 */	protected Color handleColor = Color.white, graphForeground = Color.black;	/**	 * Overrides the parent implementation to return the value component stored	 * in the user object instead of this renderer if a value component exists.	 * This applies some of the values installed to this renderer to the value	 * component (border, opaque) if the latter is a JComponent.	 *	 * @return Returns a configured renderer for the specified view.	 */	public Component getRendererComponent(JGraph graph, CellView view,			boolean sel, boolean focus, boolean preview) {		handleColor = graph.getHandleColor();		graphForeground = graph.getForeground();		isGroup = DefaultGraphModel.isGroup(graph.getModel(), view.getCell());		return super.getRendererComponent(graph, view, sel, focus, preview);	}	/**	 * renderer paint method	 */	public void paint(Graphics g) {		super.paint(g);		if (isGroup) {			g.setColor(handleColor);			g.fill3DRect(handle.x, handle.y, handle.width, handle.height, true);			g.setColor(graphForeground);			g.drawRect(handle.x, handle.y, handle.width, handle.height);			g.drawLine(handle.x + 1, handle.y + handle.height / 2, handle.x					+ handle.width - 2, handle.y + handle.height / 2);			if (view.isLeaf())				g.drawLine(handle.x + handle.width / 2, handle.y + 1, handle.x						+ handle.width / 2, handle.y + handle.height - 2);		}	}	/**	 * Detect whether or not a point has hit the group/ungroup image	 *	 * @param pt	 *            the point to check	 * @return whether or not the point lies within the handle	 */	public boolean inHitRegion(Point2D pt) {		return handle.contains(pt.getX(), pt.getY());	}}