GEF：使用Draw2D画流程图-（下）

连接点PathFigure

连接点从PolylineConnection继承下来，在构造函数中设置目标对象连接点的装饰类，也就是示例中的三角形（PolylineDecoration），以及设定连接线路由样式，这里设置为ManhattanConnectionRouter

 

1 public class PathFigure extends PolylineConnection {
2     public PathFigure() {
3         //setSourceDecoration(new PolygonDecoration());
4         setTargetDecoration(new PolylineDecoration());
5         //setConnectionRouter(new BendpointConnectionRouter());
6         setConnectionRouter(new ManhattanConnectionRouter());
7
8     }
9 }

监听移动事件

 

01 public class Dnd extends MouseMotionListener.Stub implements MouseListener {
02     public Dnd(IFigure figure) {
03         figure.addMouseMotionListener(this);
04         figure.addMouseListener(this);
05     }
06
07     Point start;
08
09     public void mouseReleased(MouseEvent e) {
10     }
11
12     public void mouseClicked(MouseEvent e) {
13     }
14
15     public void mouseDoubleClicked(MouseEvent e) {
16     }
17
18     public void mousePressed(MouseEvent e) {
19         start = e.getLocation();
20     }
21
22     public void mouseDragged(MouseEvent e) {
23         Point p = e.getLocation();
24         Dimension d = p.getDifference(start);
25         start = p;
26         Figure f = ((Figure) e.getSource());
27         f.setBounds(f.getBounds().getTranslated(d.width, d.height));
28     }
29 }

 

Flowchart

Flowchart是主程序代码，生成最上图所示的所有图例、连接，并把连接于连接点关联起来，并加入监听移动事件对象

 

01 public class Flowchart {
02     public static void main(String args[]) {
03         Shell shell = new Shell();
04         shell.setSize(300, 400);
05         shell.open();
06         shell.setText("Flowchart");
07         LightweightSystem lws = new LightweightSystem(shell);
08         ChartFigure flowchart = new ChartFigure();
09         lws.setEventDispatcher(new SWTEventDispatcherX(1800000L));
10         lws.setContents(flowchart);
11         TerminatorFigure start = new TerminatorFigure();
12         start.setName("Start");
13         start.setToolTip(new Label("起点"));
14         start.setBounds(new Rectangle(40, 20, 80, 20));
15         DecisionFigure dec = new DecisionFigure();
16         dec.setName("Should I?");
17         dec.setBounds(new Rectangle(30, 60, 100, 60));
18         ProcessFigure proc = new ProcessFigure();
19         proc.setName("Do it!");
20         proc.setToolTip(new Button("do it"));
21         proc.setBounds(new Rectangle(40, 140, 80, 40));
22         TerminatorFigure stop = new TerminatorFigure();
23         stop.setName("End");
24         stop.setBounds(new Rectangle(140, 300, 80, 20));
25         PathFigure path1 = new PathFigure();
26         path1.setSourceAnchor(start.outAnchor);
27         path1.setTargetAnchor(dec.inAnchor);
28         PathFigure path2 = new PathFigure();
29         path2.setSourceAnchor(dec.yesAnchor);
30         path2.setTargetAnchor(proc.inAnchor);
31         PathFigure path3 = new PathFigure();
32         path3.setSourceAnchor(dec.noAnchor);
33         path3.setTargetAnchor(stop.inAnchor);
34         PathFigure path4 = new PathFigure();
35         path4.setSourceAnchor(proc.outAnchor);
36         path4.setTargetAnchor(stop.inAnchor);
37         flowchart.add(start);
38         flowchart.add(dec);
39         flowchart.add(proc);
40         flowchart.add(stop);
41         flowchart.add(path1);
42         flowchart.add(path2);
43         flowchart.add(path3);
44         flowchart.add(path4);
45         new Dnd(start);
46         new Dnd(proc);
47         new Dnd(dec);
48         new Dnd(stop);
49         Display display = Display.getDefault();
50         while (!shell.isDisposed()) {
51             if (!display.readAndDispatch())
52                 display.sleep();
53         }
54     }
55 }

 

参考：Draw2D教程

 

 

推荐：你可能需要的在线电子书

 

欢迎转载，转载请注明：转载自周金根 [ http://zhoujg.cnblogs.com/ ]