SWT:在Linux上使用setEnabled()后单击按钮的问题

setEnabled()

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class TestButton {

    public TestButton() {
        Display display = new Display();
        Shell shell = new Shell(display);
        GridLayout mainLayout = new GridLayout();
        shell.setLayout(mainLayout);
        shell.setSize(100, 100);

        Button testButton = new Button(shell, SWT.PUSH);
        testButton.addSelectionListener(new TestClickListener());
        testButton.setText("Click me!");
        //testButton.setEnabled(false);
        //testButton.setEnabled(true);

        shell.open();

        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) display.sleep();
        }
        display.dispose();
    }

    class TestClickListener implements SelectionListener {

        @Override
        public void widgetDefaultSelected(SelectionEvent e) {
        }

        @Override
        public void widgetSelected(SelectionEvent e) {
            System.out.println("Click!");
        }
    }

    public static void main(String[] args) {
       new TestButton();
    }

}

当我把这两行注释掉-我可以正确地点击一个按钮,总是得到“点击记录,但如果我取消注释他们-然后我不能用鼠标正确点击按钮-按钮似乎被点击,但没有任何记录。。。

谢谢你的提示!

在Ubuntu 9.10,Gnome+Compiz,Sun Java 1.6.0.16上运行代码