SWT求教,关于ScrolledComposite

[getserved]

我发现ScrolledComposite监听鼠标滚轮时,如果其parent是如tabFolder这样的组件时,就不响应滚轮事件了,请问谁能解决?
另问事件监听器里怎么响应鼠标滚轮?我查了MouseEvent里是没有的,MouseWheelListener用的也是MouseEvent.

//这些是在createComponet里
shell = new Shell();
shell.setSize(500, 375);
shell.setText("SWT Application");
shell.setLayout(new FormLayout());

//这里是创建TabFolder
TabFolder t = new TabFolder(shell, SWT.NONE);
t.setBounds(0,0,500,375);

TabItem ti = new TabItem(t, SWT.NONE);
ti.setText("abc");

//这些是生成内容
a = new Composite(t, SWT.NONE);
FormData af = new FormData();
af.top = new FormAttachment(0,100,0);
af.bottom = new FormAttachment(100,100,0);
af.left = new FormAttachment(0,100,0);
af.right = new FormAttachment(100,100,0);
a.setLayoutData(af);
a.setBackground(Display.getDefault().getSystemColor(SWT.COLOR_BLACK));

ScrolledComposite aa = new ScrolledComposite(a, SWT.H_SCROLL);
aa.setBounds(0,0,475,320);

ScrolledComposite b = new ScrolledComposite(aa, SWT.V_SCROLL);
b.setBounds(0,0,475,320);
b.setBackground(Display.getDefault().getSystemColor(SWT.COLOR_RED));

Composite c = new Composite(b, SWT.NONE);
c.setBounds(0,0,1000, 100);
c.setBackground(Display.getDefault().getSystemColor(SWT.COLOR_WHITE));

Composite cc = new Composite(b, SWT.NONE);
cc.setBounds(0,100,1000,1000);

for(int i = 0; i < 1000/20; i++){
Label l = new Label(cc, SWT.NONE);
l.setBounds(0,20*i,20,20);
l.setText(""+i);
}

aa.setContent(c);
b.setContent(cc);

ti.setControl(test.a);

[qingkangxu]

给你一个例子，可直接运行！

/*
 * Created on 2008/04/29
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package swt;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.TabFolder;
import org.eclipse.swt.widgets.TabItem;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.events.ControlAdapter;
import org.eclipse.swt.events.ControlEvent;
import org.eclipse.swt.graphics.Point;

/**
 * @author qingkangxu
 * 
 * TODO To change the template for this generated type comment go to Window -
 * Preferences - Java - Code Style - Code Templates
 */
public class TabFolderTest {

	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display, SWT.SHELL_TRIM);
		shell.setText("TabFolder");
		shell.setLayout(new FillLayout());

		TabFolder folder = new TabFolder(shell, SWT.NONE);
		TabItem item1 = new TabItem(folder, SWT.NONE);
		item1.setText("label");
		
		// create the sc
		final ScrolledComposite sc = new ScrolledComposite(folder, SWT.V_SCROLL);
		sc.setExpandHorizontal(true);
		sc.setExpandVertical(true);
		sc.getVerticalBar().setIncrement(5);

		// create the composite on the sc
		final Composite endpointComp = new Composite(sc, SWT.NONE);
		GridData suGridData = new GridData(GridData.FILL_BOTH);
		endpointComp.setLayoutData(suGridData);
		endpointComp.setLayout(new GridLayout(1, true));
		//add button to the endpointComp
		addCompToEndpointComp(endpointComp);

		sc.addControlListener(new ControlAdapter() {
			public void controlResized(ControlEvent e) {

				Point p = endpointComp.computeSize(SWT.DEFAULT, SWT.DEFAULT);
				sc.setMinSize(p.x, p.y + 10);
				endpointComp.layout();
			}
		});
		sc.setContent(endpointComp);		
		item1.setControl(sc);

		TabItem item2 = new TabItem(folder, SWT.NONE);
		item2.setText("radio");
		Group group2 = new Group(folder, SWT.NONE);
		group2.setText("Radio Group");
		group2.setLayout(new GridLayout());
		Button radio1 = new Button(group2, SWT.RADIO);
		radio1.setText("radio1");
		Button radio2 = new Button(group2, SWT.RADIO);
		radio2.setText("radio2");
		item2.setControl(group2);

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

	private static void addCompToEndpointComp(Composite endpointComp) {
		for (int i = 0; i < 20; i++) {
			Button button = new Button(endpointComp, SWT.PUSH);
			button.setText("ForTestBtn"+i);
			button.setLayoutData(new GridData());
		}

	}
}