控制树的可选择项

控制树的可选择项，就是根据所选的项。重新选择。

 

public class Snippet80 {
	public static void main(String[] args) {
		final Display display = new Display();
		final Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		final Tree tree = new Tree(shell, SWT.BORDER | SWT.MULTI);
		for (int i = 0; i < 2; i++) {
			TreeItem item = new TreeItem(tree, SWT.NONE);
			item.setText("item " + i);
			for (int j = 0; j < 2; j++) {
				TreeItem subItem = new TreeItem(item, SWT.NONE);
				subItem.setText("item " + j);
				for (int k = 0; k < 2; k++) {
					TreeItem subsubItem = new TreeItem(subItem, SWT.NONE);
					subsubItem.setText("item " + k);
				}
			}
		}
		tree.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				List<TreeItem> list = new ArrayList<TreeItem>();
				for(TreeItem selectItem : tree.getSelection()) {
					if (selectItem.getText().indexOf("1") > 0) {
						list.add(selectItem);
					}
				}
				tree.setSelection(list.toArray(new TreeItem[list.size()]));
			}
		});
		shell.setSize(300, 300);
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}

 

 

代码实现的，选择文本信息中的有“1”的。