gpcellviewfactory.java

JGraph扩展应用。自定义Renderer,自定义视图View实现自定义工作流控件

package flow.graph.gui.graph;

import java.awt.Color;
import java.util.Map;

import org.jgraph.graph.DefaultCellViewFactory;
import org.jgraph.graph.DefaultGraphCell;
import org.jgraph.graph.GraphConstants;
import org.jgraph.graph.Port;
import org.jgraph.graph.PortView;
import org.jgraph.graph.VertexView;

import flow.graph.gui.graph.item.GraphPortView;

/**
 * A default view factory for a JGraph. This simple factory associate a given
 * cell class to a cell view. This is a javabean, just parameter it correctly in
 * order it meets your requirements (else subclass it or subclass
 * DefaultCellViewFactory). You can also recover the gpConfiguration of that
 * javabean via an XML file via XMLEncoder/XMLDecoder.
 * 
 * @author rvalyi, license of this file: LGPL as stated by the Free Software
 *         Foundation
 */
public class GPCellViewFactory extends DefaultCellViewFactory {
	
	public static final String VIEW_CLASS_KEY = "viewClassKey";
	
	public static final void setViewClass(Map map, String viewClass) {
		map.put(VIEW_CLASS_KEY, viewClass);
	}
	
	public static final String getViewClass(Map map) {
		return (String) map.get(VIEW_CLASS_KEY);
	}
	
	
	/*
	protected PortView createPortView(Port p) {
		return new GraphPortView(p);
	}
	*/
	
	protected VertexView createVertexView(Object v) {
		try {
			DefaultGraphCell cell = (DefaultGraphCell) v;
			String viewClass = (String) cell.getAttributes().get(VIEW_CLASS_KEY);

			VertexView view = (VertexView) Thread.currentThread()
					.getContextClassLoader().loadClass(viewClass).newInstance();
			view.setCell(v);
			return view;
		} catch (Exception ex) {
		}
		return super.createVertexView(v);
	}
	
	/*
	protected PortView createPortView(Port p) {
		return new FlowPortView(p);
	}
	*/
}