tree1.java

SWTJFace篇项目源程序该项目包含 包含了Eclipse下构建swt的基本工程

package cn.com.chengang.swt;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;

public class Tree1 {
	public static void main(String[] args) {
		final Display display = Display.getDefault();
		final Shell shell = new Shell();
		shell.setSize(327, 253);
		// ---------创建窗口中的其他界面组件-------------
		shell.setLayout(new FillLayout());

		// 创建一个Tree对象。SWT.SINGLE单选，SWT.MULTI则可多选
		final Tree tree = new Tree(shell, SWT.SINGLE);
		TreeItem chinaItem = new TreeItem(tree, SWT.NONE);
		chinaItem.setText("中国");
		new TreeItem(chinaItem, SWT.NULL).setText("北京");
		new TreeItem(chinaItem, SWT.NULL).setText("台湾");
		new TreeItem(chinaItem, SWT.NULL).setText("桂林");
		new TreeItem(tree, SWT.NONE).setText("美国");

		// 当单击Tree的结点时，结点文字显示于窗口标题栏中
		tree.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				// 因Tree可支持多选，所以getSelection方法返回的是一个数组
				// 但本例Tree为单选，所以数组只有一个元素
				TreeItem[] items = tree.getSelection();
				shell.setText(items[0].getText());
			}
		});
		// -----------------END------------------------
		shell.layout();
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}