1. public void plot(){ 
2.     //if no place to plot, or no data to plot, return. 
3.     if(null==_parent || null==_seriesData) 
4.         return; 
5. 
6.     Composite composite = new Composite(_parent, SWT.BORDER); 
7.     composite.setLayout(new FillLayout()); 
8.     FigureCanvas canvas = new FigureCanvas(composite); 
9.      
10.     Panel contents = new Panel();//A Panel is a general purpose container figure 
11.     contents.setLayoutManager(new XYLayout()); 
12.     initializeSpan(contents.getClientArea()); 
13.      
14.     populateNodesAndEdges();      
15.      
16.     drawAxis(contents); 
17.     for(int i=0; i<_numSeries; i++){ 
18.      drawDotsAndConnections(contents,getDirectedGraph(i)); //  
draw points & connecting wires 
19.     } 
20.     canvas.setContents(contents); 
21. }