j6_09.java

石志国著《JSP应用教程》

package hello;
import java.awt.Color;
import java.awt.geom.Rectangle2D;
import java.util.Hashtable;
import java.util.Map;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import org.jgraph.JGraph;
import org.jgraph.graph.*;
public class j6_09 {
  public static void main(String[] args) {
    // Construct Model and Graph
    GraphModel model = new DefaultGraphModel();
    JGraph graph = new JGraph(model);
    graph.setSelectNewCells(true);
    // Create Nested Map (from Cells to Attributes)
    Map attributes = new Hashtable();
    // Create Hello Vertex
    DefaultGraphCell hello = new DefaultGraphCell("Hello");
    // Create Hello Vertex Attributes
    Map helloAttrib = GraphConstants.createMap();
    attributes.put(hello, helloAttrib);
    // Set bounds
    Rectangle2D helloBounds = GraphConstants.createRect(20, 20, 40, 20);
    GraphConstants.setBounds(helloAttrib, helloBounds);
    // Set black border
    GraphConstants.setBorderColor(helloAttrib, Color.black);
    // Add a Port
    DefaultPort hp = new DefaultPort();
    hello.add(hp);
    // Create World Vertex
    DefaultGraphCell world = new DefaultGraphCell("World");
    // Create World Vertex Attributes
    Map worldAttrib = GraphConstants.createMap();
    attributes.put(world, worldAttrib);
    // Set bounds
    Rectangle2D worldBounds = GraphConstants.createRect(140, 140, 40, 20);
    GraphConstants.setBounds(worldAttrib , worldBounds);
    // Set fill color
    GraphConstants.setBackground(worldAttrib, Color.orange);
    GraphConstants.setOpaque(worldAttrib, true);
    // Set raised border
    GraphConstants.setBorder(worldAttrib, 
           BorderFactory.createRaisedBevelBorder());
    // Add a Port
    DefaultPort wp = new DefaultPort();
    world.add(wp);
    // Create Edge
    DefaultEdge edge = new DefaultEdge();
    // Create Edge Attributes
    Map edgeAttrib = GraphConstants.createMap();
    attributes.put(edge, edgeAttrib);
    // Set Arrow
    int arrow = GraphConstants.ARROW_CLASSIC;
    GraphConstants.setLineEnd(edgeAttrib , arrow);
    GraphConstants.setEndFill(edgeAttrib, true);
    // Connect Edge
    ConnectionSet cs = new ConnectionSet(edge, hp, wp);
    Object[] cells = new Object[]{edge, hello, world};
    // Insert into Model
    model.insert(cells, attributes, cs, null, null);
    // Show in Frame
    JFrame frame = new JFrame();
    frame.getContentPane().add(new JScrollPane(graph));
    //frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    frame.setVisible(true);
  }
}