【学习】Eclipse官方Zest的两个事例（二）

【学习】Eclipse官方Zest的两个例子（二）

紧接上文。

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总结：

采用了JFace View的方式；三个图形点都增加了图标；三条线都加了Tooltip；感觉三个图形点会根据图标大小字体大小自动调整图形点的大小；

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代码：

/** * This snippet shows how to use the IGraphContentProvider to create a graph with Zest. * In this example, getElements returns 3 edges: * * Rock2Paper *  * Paper2Scissors *  * Scissors2Rock *  * And for each of these, the source and destination are returned in getSource and getDestination. *  * A label provider is also used to create the text and icons for the graph. *  * @author Ian Bull *  */public class GraphJFaceSnippet2 {static class MyContentProvider implements IGraphContentProvider {public Object getSource(Object rel) {if ("Rock2Paper".equals(rel)) {return "Rock";} else if ("Paper2Scissors".equals(rel)) {return "Paper";} else if ("Scissors2Rock".equals(rel)) {return "Scissors";}return null;}public Object[] getElements(Object input) {return new Object[] { "Rock2Paper", "Paper2Scissors", "Scissors2Rock" };}public Object getDestination(Object rel) {if ("Rock2Paper".equals(rel)) {return "Paper";} else if ("Paper2Scissors".equals(rel)) {return "Scissors";} else if ("Scissors2Rock".equals(rel)) {return "Rock";}return null;}public double getWeight(Object connection) {return 0;}public void dispose() {}public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {}}static class MyLabelProvider extends LabelProvider {final Image image = Display.getDefault().getSystemImage(SWT.ICON_WARNING);public Image getImage(Object element) {if (element.equals("Rock") || element.equals("Paper") || element.equals("Scissors")) {return image;}return null;}public String getText(Object element) {return element.toString();}}static GraphViewer viewer = null;/** * @param args */public static void main(String[] args) {Display d = new Display();Shell shell = new Shell(d);shell.setText("GraphJFaceSnippet2");shell.setLayout(new FillLayout(SWT.VERTICAL));shell.setSize(400, 400);viewer = new GraphViewer(shell, SWT.NONE);viewer.setContentProvider(new MyContentProvider());viewer.setLabelProvider(new MyLabelProvider());viewer.setLayoutAlgorithm(new SpringLayoutAlgorithm(LayoutStyles.NO_LAYOUT_NODE_RESIZING));viewer.setInput(new Object());shell.open();while (!shell.isDisposed()) {while (!d.readAndDispatch()) {d.sleep();}}}}

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效果图：

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