原文的链接：http://wiki.eclipse.org/index.php/GEF_Zest_Visualization#Layout_Algorithms
感觉不错的有这么几点：
- 代码很少；
- 居然开始打开有动态效果；
- 三个GraphNode点都是可以用鼠标动态调整位置的；
- 三个GraphNode点和三个GraphConnection都可以选中，而且选中变色；
- 三个GraphNode点都有Tooltip；
- 三个GraphNode点拖动出窗口，自动有滚动条；
源代码：
/**
* This snippet creates a very simple graph where Rock is connected to Paper
* which is connected to scissors which is connected to rock.
*
* The nodes a layed out using a SpringLayout Algorithm, and they can be moved
* around.
*
* @author Ian Bull
*
*/
public class GraphSnippet1 {
private static Display display = Display.getDefault();
private static Shell shell;
private static void createShell() {
shell = new Shell(display);
shell.setText("GraphSnippet1");
shell.setLayout(new FillLayout());
shell.setSize(400, 400);
}
private static void openShell() {
shell.open();
while (!shell.isDisposed()) {
while (!display.readAndDispatch()) {
display.sleep();
}
}
}
public static void main(String[] args) {
createShell();
createZestExample();
openShell();
}
private static void createZestExample() {
Graph g = new Graph(shell, SWT.NONE);
GraphNode n = new GraphNode(g, SWT.NONE, "Paper");
GraphNode n2 = new GraphNode(g, SWT.NONE, "Rock");
GraphNode n3 = new GraphNode(g, SWT.NONE, "Scissors");
new GraphConnection(g, SWT.NONE, n, n2);
new GraphConnection(g, SWT.NONE, n2, n3);
new GraphConnection(g, SWT.NONE, n3, n);
g.setLayoutAlgorithm(new SpringLayoutAlgorithm(LayoutStyles.NO_LAYOUT_NODE_RESIZING), true);
}
}
