SWT开发 - Button的使用（2） - Radio按钮

package com.test.swt;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;

public class ButtonSample02 {

    public static void main (String [] args) {
        Display display = new Display ();
        final Shell shell = new Shell (display);
        shell.setLayout (new RowLayout (SWT.VERTICAL));
        for (int i=0; i<5; i++) {
            Button button = new Button (shell, SWT.RADIO);
            button.setData("V" + i);
            button.setText ("B" + i);
            
            button.addListener (SWT.Selection, new Listener () {
                public void handleEvent (Event event) {
                    
                    Button widget = (Button)event.widget;
                    if (widget.getSelection()) {
                        MessageBox box1 = new MessageBox(shell,SWT.OK);
                        box1.setMessage(widget.getData().toString());
                        box1.open();
                    }
                }
            });
            
            if (i == 0) button.setSelection (true);
        }
        
        
        shell.pack ();
        shell.open ();
        while (!shell.isDisposed ()) {
            if (!display.readAndDispatch ()) display.sleep ();
        }
        display.dispose ();
    }
}