esempi JGraphT

Question

vorrei tracciare linee su un semplice x,y grafico per visualizzare in una JApplet utilizzando JGraphT. Gli esempi che ho trovato non sono stati molto utili. Qualcuno potrebbe indicarmi qualche semplice esempio di JGraphT?

Answer 1

qui un esempio spero vi aiuterà jgrapht

Answer 2

package simple; 

import java.awt.*; 
import java.awt.geom.*; 


import javax.swing.*; 


import org.jgraph.JGraph; 
import org.jgraph.graph.AttributeMap; 
import org.jgraph.graph.DefaultGraphCell; 
import org.jgraph.graph.GraphConstants; 
import org.jgrapht.*; 
import org.jgrapht.ext.*; 
import org.jgrapht.graph.*; 

// resolve ambiguity 
import org.jgrapht.graph.DefaultEdge; 

import com.compilervision.common.CFNode; 
import com.compilervision.common.llvmir.instructions.CFG; 
import com.compilervision.common.Edge; 

/** 
* A demo applet that shows how to use JGraph to visualize JGraphT graphs. 
* 
* @author Barak Naveh 
* @since Aug 3, 2003 
*/ 
public class Test 
    extends JApplet 
{ 
    //~ Static fields/initializers --------------------------------------------- 

    private static final long serialVersionUID = 3256444702936019250L; 
    private static final Color DEFAULT_BG_COLOR = Color.decode("#FAFBFF"); 
    private static final Dimension DEFAULT_SIZE = new Dimension(530, 320); 

    //~ Instance fields -------------------------------------------------------- 

    // 
    private JGraphModelAdapter<CFNode, Edge> jgAdapter; 

    //~ Methods ---------------------------------------------------------------- 

    /** 
    * An alternative starting point for this demo, to also allow running this 
    * applet as an application. 
    * 
    * @param args ignored. 
    */ 
    public static void main(String [] args) 
    { 
     Test applet = new Test(); 
     applet.init(); 

     JFrame frame = new JFrame(); 
     frame.getContentPane().add(applet); 
     frame.setTitle("JGraphT Adapter to JGraph Demo"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.pack(); 
     frame.setVisible(true); 
    } 

    /** 
    * {@inheritDoc} 
    */ 
    public void init() 
    { 


     // create a JGraphT graphq 
     ListenableGraph<CFNode, Edge> g = 
      new ListenableDirectedMultigraph<CFNode, Edge>(
        Edge.class); 

     // create a visualization using JGraph, via an adapter 
     jgAdapter = new JGraphModelAdapter<CFNode,Edge>(g); 

     JGraph jgraph = new JGraph(jgAdapter); 

     adjustDisplaySettings(jgraph); 
     getContentPane().add(jgraph); 
     resize(DEFAULT_SIZE); 

     String v1 = "v1"; 
     String v2 = "v2"; 
     String v3 = "v3"; 
     String v4 = "v4"; 

     // add some sample data (graph manipulated via JGraphT) 
     g.addVertex(v1); 
     g.addVertex(v2); 
     g.addVertex(v3); 
     g.addVertex(v4); 

     g.addEdge(v1, v2); 
     g.addEdge(v2, v3); 
     g.addEdge(v3, v1); 
     g.addEdge(v4, v3); 

     // position vertices nicely within JGraph component 
     //GraphSimpleLayout() 
     positionVertexAt(v1, 130, 140); 
     positionVertexAt(v2, 60, 200); 
     positionVertexAt(v3, 310, 230); 
     positionVertexAt(v4, 380, 70); 

     // that's all there is to it!... 
    } 

    private void adjustDisplaySettings(JGraph jg) 
    { 
     jg.setPreferredSize(DEFAULT_SIZE); 

     Color c = DEFAULT_BG_COLOR; 
     String colorStr = null; 

     try { 
      colorStr = getParameter("bgcolor"); 
     } catch (Exception e) { 
     } 

     if (colorStr != null) { 
      c = Color.decode(colorStr); 
     } 

     jg.setBackground(c); 
    } 

    @SuppressWarnings("unchecked") // FIXME hb 28-nov-05: See FIXME below 
    private void positionVertexAt(Object vertex, int x, int y) 
    { 
     DefaultGraphCell cell = jgAdapter.getVertexCell(vertex); 
     AttributeMap attr = cell.getAttributes(); 
     Rectangle2D bounds = GraphConstants.getBounds(attr); 

     Rectangle2D newBounds = new Rectangle2D.Double(x,y,bounds.getWidth(),bounds.getHeight()); 

     GraphConstants.setBounds(attr, newBounds); 

     // TODO: Clean up generics once JGraph goes generic 
     org.jgraph.graph.AttributeMap cellAttr = new AttributeMap(); 
     cellAttr.put(cell, attr); 
     jgAdapter.edit(cellAttr, null, null, null); 
    } 

    //~ Inner Classes ---------------------------------------------------------- 

    /** 
    * a listenable directed multigraph that allows loops and parallel edges. 
    */ 
    private static class ListenableDirectedMultigraph<V, E> 
     extends DefaultListenableGraph<V, E> 
     implements DirectedGraph<V, E> 
    { 
     private static final long serialVersionUID = 1L; 

     ListenableDirectedMultigraph(Class<E> edgeClass) 
     { 
      super(new DirectedMultigraph<V, E>(edgeClass)); 
     } 
    } 
} 

// End JGraphAdapterDemo.java