紧接上文。
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；
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();
}
}
}
}
