JPopupButton

 

 

本来在网上找了一个JPopupButton【@author SunKing】，但是实际使用的时候，无法满足L&F效果，在JGoodies Looks下无法正常显示。

 

期间还在网络找了一个JPopupToggleButton【@author Alexander Wenckus】，但是感觉过于简单，也不够满意。

 

于是只好自己重写一个。

 

 

以下为相关代码：

 

注意： 勿遗落最后的/name/xio/util/swing/toolbar-buttonarrow.png文件。

 

name.xio.util.swing.JPopupButton

 

package name.xio.util.swing;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.AbstractAction;
import javax.swing.AbstractButton;
import javax.swing.Action;
import javax.swing.BorderFactory;
import javax.swing.ButtonModel;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPopupMenu;
import javax.swing.JToolBar;
import javax.swing.MenuElement;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.WindowConstants;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;

import name.xio.util.swing.icon.CompositeIcon;
import name.xio.util.swing.icon.HTextIcon;

import com.by.yb.util.Utilities; 
import com.jgoodies.looks.LookUtils;
import com.jgoodies.looks.plastic.PlasticXPLookAndFeel;
import com.jgoodies.looks.plastic.theme.ExperienceBlue;
import com.jgoodies.looks.windows.WindowsLookAndFeel;

/**
 * 弹出菜单按钮
 * @author xio
 *
 */
public class JPopupButton extends JButton {

	private static final long serialVersionUID = -6783978058195706887L;

	/**
	 * 弹出菜单
	 */
	private JPopupMenu menu = new JPopupMenu();

	/**
	 * 按钮点击事件，与菜单中的第几项绑定
	 */
	private int attachActionOnPopupMenuIndex = -1;

	/**
	 * 是否显示箭头部分的分割线
	 */
	private boolean showSeparator = false;

	public final static int NARROW_WIDTH = 11;

	public JPopupButton(Icon icon, JPopupMenu menu) {
		this(null, icon, menu);
	}

	public JPopupButton(String text, JPopupMenu menu) {
		this(text, null, menu);
	}

	public JPopupButton(String text, Icon icon, JPopupMenu menu) {
		initView(text, icon, menu);
	}

	/**
	 * 初始化菜单按钮的视图
	 * @param text
	 * @param icon
	 * @param menu
	 */
	private void initView(String text, Icon icon, JPopupMenu menu) {
		//1.按钮绘制

		this.setFocusable(false);
		this.setText(null);

		HTextIcon hTextIcon = new HTextIcon(this, text, 10);
		if (icon != null) {
			CompositeIcon commonButtonIcon = new CompositeIcon(icon, hTextIcon, CompositeIcon.LEFT);
			CompositeIcon popupButtonIcon = new CompositeIcon(commonButtonIcon, new ImageIcon(JPopupButton.class
				.getResource("toolbar-buttonarrow.png")), CompositeIcon.LEFT, 2, 0);

			this.setIcon(popupButtonIcon);
		}
		else {
			CompositeIcon popupButtonIcon = new CompositeIcon(hTextIcon, new ImageIcon(JPopupButton.class
				.getResource("toolbar-buttonarrow.png")), CompositeIcon.LEFT, 2, 0);

			this.setIcon(popupButtonIcon);
		}

		//this.setMargin(new Insets());

		this.menu = menu;

		//2.事件监听

		//Rollover监听
		this.addChangeListener(new RolloverChangeListener());

		//添加按钮鼠标事件监听
		PopupButtonListener popupButtonListener = new PopupButtonListener();
		this.addMouseMotionListener(popupButtonListener);
		this.addMouseListener(popupButtonListener);

		//添加菜单事件监听
		if (menu != null) {
			menu.addPopupMenuListener(popupButtonListener);
		}

		//初始按钮事件绑定
		clearAttachActionOnPopupMenu();

	}

	/**
	 * 清空按钮绑定事件
	 */
	public void clearAttachActionOnPopupMenu() {
		attachActionOnPopupMenu(-1);
	}

	/**
	 * 按钮行为绑定为弹出菜单第一项
	 */
	public void attachDefaultActionOnPopupMenu() {
		attachActionOnPopupMenu(0);
	}

	/**
	 * 按钮的行为绑定为弹出菜单
	 * @param index
	 */
	public void attachActionOnPopupMenu(int index) {
		if (menu == null) {
			attachActionOnPopupMenuIndex = -1;
		}
		else {
			MenuElement[] menuElements = menu.getSubElements();
			if ((index < 0) || (Utilities.isEmpty(menuElements)) || (index >= menuElements.length)) {
				attachActionOnPopupMenuIndex = -1;
			}
			else {
				attachActionOnPopupMenuIndex = index;
			}
		}
	}

	/**
	 * @return Returns the menu.
	 */
	public JPopupMenu getMenu() {
		return menu;
	}

	private void showMenu() {
		if (menu == null) {
			return;
		}
		Point locate = locateMenu();
		menu.show(this, locate.x, locate.y);
	}

	private void showSeparator(boolean b) {
		showSeparator = b;
		this.repaint();
	}

	/**
	 * 按钮左部触发
	 */
	public void onClick() {

		//点击位置为箭头位置  
		boolean mouseInNarrow = isMouseInNarrow();

		if (mouseInNarrow) {
			onClickNarrow();
		}
		else {

			if (attachActionOnPopupMenuIndex < 0) {
				onClickNarrow();
			}
			else {
				MenuElement[] menuElements = menu.getSubElements();
				((AbstractButton) menuElements[attachActionOnPopupMenuIndex]).doClick();
			}
		}
	}

	/**
	 * 按钮箭头部触发
	 */
	private void onClickNarrow() {
		showMenu();
	}

	/**
	 * 菜单位置
	 * @return
	 */
	protected Point locateMenu() {
		Point locate = new Point((int) getAlignmentX(),
			(int) getAlignmentY() + (getHeight() == 0 ? getPreferredSize().height : getHeight()));
		return locate;
	}

	public void paint(Graphics g) {
		super.paint(g);

		//绘制分离线
		if (showSeparator) {
			Color oldColor = g.getColor();

			Insets insets = this.getInsets();

			int width = getWidth();
			int height = getHeight();

			Icon icon = this.getIcon();
			//int x = icon == null ? (width - NARROW_WIDTH) : (mrgin.left - insets.left + icon.getIconWidth() - NARROW_WIDTH);
			int x = icon == null ? (width - NARROW_WIDTH) : (insets.left + icon.getIconWidth() - NARROW_WIDTH);
			int y = 0;

			//			Button.light
			//			Button.shadow
			//			Button.darkShadow
			//			Button.highlight

			//g.setColor(new Color(216, 214, 207));
			g.setColor(UIManager.getColor("Button.shadow"));
			g.drawLine(x, y + 1, x, y + height - 3);

			//g.setColor(new Color(250, 250, 248));
			g.setColor(UIManager.getColor("Button.highlight"));
			g.drawLine(x + 1, y + 1, x + 1, y + height - 3);

			g.setColor(oldColor);
		}
	}

	/**
	 * 当前鼠标是否在按钮上
	 * @return
	 */
	public boolean isMouseOver() {
		return this.getMousePosition() != null;
	}

	/**
	 * 鼠标位置是否在箭头部分
	 * @return
	 */
	public boolean isMouseInNarrow() {
		Point position = this.getMousePosition();
		if (position == null) {
			return false;
		}
		else {
			return isMouseInNarrow(position);
		}
	}

	/**
	 * 鼠标位置是否在箭头部分
	 * @param position
	 * @return
	 */
	public boolean isMouseInNarrow(Point position) {
		Insets insets = this.getInsets();

		Icon icon = this.getIcon();

		int width = this.getWidth();
		int height = this.getHeight();

		//int narrowFromX = icon == null ? (width - NARROW_WIDTH) : (mrgin.left - insets.left + icon.getIconWidth() - NARROW_WIDTH);
		int narrowFromX = icon == null ? (width - NARROW_WIDTH) : (insets.left + icon.getIconWidth() - NARROW_WIDTH);
		int narrowFromY = 0;

		int narrowEndX = width;
		int narrowEndY = height;

		int eventX = (int) position.getX();
		int eventY = (int) position.getY();

		return ((narrowFromX <= eventX) && (eventX <= narrowEndX)) && ((narrowFromY <= eventY) && (eventY <= narrowEndY));
	}

	/**
	 * 按钮Rollover监听
	 * @author xio
	 *
	 */
	class RolloverChangeListener implements ChangeListener {

		public void stateChanged(ChangeEvent e) {
			ButtonModel buttonModel = JPopupButton.this.getModel();
			showSeparator(buttonModel.isRollover() || buttonModel.isPressed());
		}

	}

	/**
	 * 按钮和菜单的事件监听
	 * @author xio
	 *
	 */
	class PopupButtonListener extends MouseAdapter implements PopupMenuListener {

		public void mouseEntered(MouseEvent e) {
			//防止部分L&F未设置Rollover
			JPopupButton.this.getModel().setRollover(true);
		}

		public void mouseExited(MouseEvent e) {
			//防止部分L&F未设置Rollover
			JPopupButton.this.getModel().setRollover(false);
			showSeparator(false);
		}

		public void mouseClicked(MouseEvent e) {
			JPopupButton.this.onClick();
		}

		public void popupMenuCanceled(PopupMenuEvent e) {
		}

		public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
			//菜单不可见时，如果鼠标还在按钮上，设置Rollover状态，以便按钮的视图显示为Rollover
			if (isMouseOver()) {
				JPopupButton.this.getModel().setRollover(true);
			}
		}

		public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
			//菜单显示时，修改按钮Rollover状态
			JPopupButton.this.getModel().setRollover(false);
		}

	}

	public static void main(String[] args) {
		try {
			//不显示ToolBar的边界
			UIManager.put("ToolBar.border", BorderFactory.createEmptyBorder());

			if (LookUtils.IS_LAF_WINDOWS_XP_ENABLED) {
				UIManager.setLookAndFeel(new WindowsLookAndFeel());
			}
			else {
				PlasticXPLookAndFeel.setCurrentTheme(new ExperienceBlue());
				UIManager.setLookAndFeel(new PlasticXPLookAndFeel());
			}

			//								PlasticXPLookAndFeel.setCurrentTheme(new ExperienceBlue());
			//								UIManager.setLookAndFeel(new PlasticXPLookAndFeel());

		}
		catch (UnsupportedLookAndFeelException e) {
			e.printStackTrace();
		}
		catch (Exception e) {
			e.printStackTrace();
		}

		JFrame frame = new JFrame("JPopupButton");
		frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
		frame.setSize(400, 320);
		//SwingUtils.locateCenterOnScreen(frame);

		class DemoAction extends AbstractAction {

			private static final long serialVersionUID = 5232174589593930544L;

			public DemoAction(String id) {
				super.putValue(Action.NAME, "Demo JPopupButton " + id);
			}

			public void actionPerformed(ActionEvent e) {
				JOptionPane.showMessageDialog((Component) e.getSource(), super.getValue(Action.NAME));
			}
		}

		JPopupMenu popup = new JPopupMenu("PopupMenu");
		popup.add(new DemoAction("0"));
		popup.add(new DemoAction("1"));
		popup.add(new DemoAction("2"));

		JPopupButton btt1 = new JPopupButton("中文文字", null, popup);

		JPopupButton btt2 = new JPopupButton("中文文字", null, popup);
		btt2.attachDefaultActionOnPopupMenu();

		JPopupButton btt3 = new JPopupButton("中文文字", UIManager.getIcon("FileView.computerIcon"), popup);
		btt3.attachActionOnPopupMenu(2);

		JToolBar toolbar = new JToolBar();

		toolbar.add(btt1);
		toolbar.add(btt2);
		toolbar.add(btt3);

		toolbar.add(new JButton("中文文字", UIManager.getIcon("FileView.computerIcon")));

		toolbar.setBorder(BorderFactory.createEmptyBorder(5, 15, 5, 3));

		frame.getContentPane().add(toolbar, BorderLayout.NORTH);
		frame.setVisible(true);
	}

}

 

name.xio.util.swing.icon.CompositeIcon

 

package name.xio.util.swing.icon;

import java.awt.Component;
import java.awt.Graphics;

import javax.swing.Icon;
import javax.swing.SwingConstants;

/**
 CompositeIcon is an Icon implementation which draws two icons with a specified relative position:
 LEFT, RIGHT, TOP, BOTTOM specify how icon1 is drawn relative to icon2
 CENTER: icon1 is drawn first, icon2 is drawn over it
 
 and with horizontal and vertical orientations within the alloted space
 
 It's useful with VTextIcon when you want an icon with your text: 
	if icon1 is the graphic icon and icon2 is the VTextIcon, you get a similar effect
	to a JLabel with a graphic icon and text
	
 * @from http://www.macdevcenter.com/pub/a/mac/2002/03/22/vertical_text.html?page=last&x-order=date
 * @changedBy xio
 */
public class CompositeIcon implements Icon, SwingConstants {
	Icon fIcon1, fIcon2;

	int fPosition, fHorizontalOrientation, fVerticalOrientation;

	int widthOffset, heightOffset;

	/**
	 Create a CompositeIcon from the specified Icons,
	 using the default relative position (icon1 above icon2)
	 and orientations (centered horizontally and vertically)
	 */
	public CompositeIcon(Icon icon1, Icon icon2) {
		this(icon1, icon2, TOP);
	}

	/**
	Create a CompositeIcon from the specified Icons,
	using the specified relative position
	and default orientations (centered horizontally and vertically)
	*/
	public CompositeIcon(Icon icon1, Icon icon2, int position) {

		this(icon1, icon2, position, CENTER, CENTER, (position == LEFT || position == RIGHT) ? 2 : -7, (position == LEFT || position == RIGHT) ? 0 : 6);
	}

	public CompositeIcon(Icon icon1, Icon icon2, int position, int widthOffset, int heightOffset) {
		this(icon1, icon2, position, CENTER, CENTER, widthOffset, heightOffset);
	}

	/**
	Create a CompositeIcon from the specified Icons,
	using the specified relative position
	and orientations
	*/
	public CompositeIcon(Icon icon1, Icon icon2, int position, int horizontalOrientation, int verticalOrientation, int widthOffset, int heightOffset) {
		fIcon1 = icon1;
		fIcon2 = icon2;
		fPosition = position;
		this.widthOffset = widthOffset;
		this.heightOffset = heightOffset;
		fHorizontalOrientation = horizontalOrientation;
		fVerticalOrientation = verticalOrientation;
	}

	/**
	  * Draw the icon at the specified location.  Icon implementations
	  * may use the Component argument to get properties useful for 
	  * painting, e.g. the foreground or background color.
	  */
	public void paintIcon(Component c, Graphics g, int x, int y) {
		int width = getIconWidth();
		int height = getIconHeight();
		if (fPosition == LEFT || fPosition == RIGHT) {
			Icon leftIcon, rightIcon;
			if (fPosition == LEFT) {
				leftIcon = fIcon1;
				rightIcon = fIcon2;
			}
			else {
				leftIcon = fIcon2;
				rightIcon = fIcon1;
			}
			// "Left" orientation, because we specify the x position
			paintIcon(c, g, leftIcon, x, y, width, height, LEFT, fVerticalOrientation);
			paintIcon(c, g, rightIcon, x + leftIcon.getIconWidth(), y, width, height, LEFT, fVerticalOrientation);
		}
		else if (fPosition == TOP || fPosition == BOTTOM) {
			Icon topIcon, bottomIcon;
			if (fPosition == TOP) {
				topIcon = fIcon1;
				bottomIcon = fIcon2;
			}
			else {
				topIcon = fIcon2;
				bottomIcon = fIcon1;
			}
			// "Top" orientation, because we specify the y position
			paintIcon(c, g, topIcon, x, y, width, height, fHorizontalOrientation, TOP);
			paintIcon(c, g, bottomIcon, x, y + topIcon.getIconHeight(), width, height, fHorizontalOrientation, TOP);
		}
		else {
			paintIcon(c, g, fIcon1, x, y, width, height, fHorizontalOrientation, fVerticalOrientation);
			paintIcon(c, g, fIcon2, x, y, width, height, fHorizontalOrientation, fVerticalOrientation);
		}
	}

	/* Paints one icon in the specified rectangle with the given orientations
	*/
	void paintIcon(Component c, Graphics g, Icon icon, int x, int y, int width, int height, int horizontalOrientation,
		int verticalOrientation) {

		int xIcon, yIcon;
		switch (horizontalOrientation) {
			case LEFT:
				xIcon = x;
				break;
			case RIGHT:
				xIcon = x + width - icon.getIconWidth();
				break;
			default:
				xIcon = x + (width - icon.getIconWidth()) / 2;
				break;
		}
		switch (verticalOrientation) {
			case TOP:
				yIcon = y;
				break;
			case BOTTOM:
				yIcon = y + height - icon.getIconHeight();
				break;
			default:
				yIcon = y + (height - icon.getIconHeight()) / 2;
				break;
		}
		icon.paintIcon(c, g, xIcon, yIcon);
	}

	/**
	 * Returns the icon's width.
	 *
	 * @return an int specifying the fixed width of the icon.
	 */
	public int getIconWidth() {
		if (fPosition == LEFT || fPosition == RIGHT)
			return fIcon1.getIconWidth() + fIcon2.getIconWidth() + widthOffset;

		return Math.max(fIcon1.getIconWidth(), fIcon2.getIconWidth()) + widthOffset;
	}

	/**
	 * Returns the icon's height.
	 *
	 * @return an int specifying the fixed height of the icon.
	 */
	public int getIconHeight() {
		if (fPosition == TOP || fPosition == BOTTOM)
			return fIcon1.getIconHeight() + fIcon2.getIconHeight() + heightOffset;

		return Math.max(fIcon1.getIconHeight(), fIcon2.getIconHeight()) + heightOffset;
	}

}

 

name.xio.util.swing.icon.HTextIcon

 

package name.xio.util.swing.icon;

import java.awt.Component;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.Icon;

/**
 * 水平文本Icon

 * @author xio
 *
 */
public class HTextIcon implements Icon, PropertyChangeListener {
	private String text;

	private int textWidth;

	private int textHeight;

	private int fontCharHeight;

	private Component fontComponent;

	private int marginLeft;

	private int marginRight;

	static final int MARGIN = 4;

	static final int MIN_TEXT_HEIGHT = 15;

	static final int MIN_TEXT_WIDTH = 16;

	public HTextIcon(Component component, String label) {
		this(component, label, MARGIN, MARGIN);
	}

	public HTextIcon(Component component, String label, int marginRight) {
		this(component, label, MARGIN, marginRight);
	}

	/**
	 * 指定一个Component，创建水平文本Icon
	 * @param component
	 * @param label
	 */
	public HTextIcon(Component component, String label, int marginLeft, int marginRight) {
		fontComponent = component;
		text = label;
		this.marginLeft = marginLeft;
		this.marginRight = marginRight;
		calcDimensions();
		fontComponent.addPropertyChangeListener(this);
	}

	/**
	 * sets the label to the given string, updating the orientation as needed
	 * and invalidating the layout if the size changes
	 * @see #verifyRotation
	 */
	public void setLabel(String label) {
		text = label;
		recalcDimensions();
	}

	/**
	 * Checks for changes to the font on the fComponent
	 * so that it can invalidate the layout if the size changes
	 */
	public void propertyChange(PropertyChangeEvent e) {
		String prop = e.getPropertyName();
		if ("font".equals(prop)) {
			recalcDimensions();
		}
	}

	/** 
	 * Calculates the dimensions.  If they've changed,
	 * invalidates the component
	 */
	void recalcDimensions() {
		int wOld = getIconWidth();
		int hOld = getIconHeight();
		calcDimensions();
		if (wOld != getIconWidth() || hOld != getIconHeight())
			fontComponent.invalidate();
	}

	void calcDimensions() {
		FontMetrics fontMetrics = fontComponent.getFontMetrics(fontComponent.getFont());
		int fontDescent = fontMetrics.getDescent();
		fontCharHeight = fontMetrics.getAscent() + fontDescent;

		textWidth = fontMetrics.stringWidth(text) + marginLeft + marginRight;
		if (textWidth < MIN_TEXT_WIDTH) {
			textWidth = MIN_TEXT_WIDTH;
		}

		textHeight = fontCharHeight + fontDescent;
		if (textHeight < MIN_TEXT_HEIGHT) {
			textHeight = MIN_TEXT_HEIGHT;
		}

		//		//强制调整尺寸
		//		fWidth -= 5;
		//		fHeight += 6;

	}

	/**
	 * 绘制文本
	 */
	public void paintIcon(Component c, Graphics g, int x, int y) {
		g.setColor(c.getForeground());
		g.setFont(c.getFont());
		g.drawString(text, x + marginLeft, y + fontCharHeight - 2);

	}

	/**
	 * icon宽度
	 */
	public int getIconWidth() {
		return textWidth;
	}

	/**
	 * icon高度
	 */
	public int getIconHeight() {
		return textHeight;
	}

}

 

 

 

/name/xio/util/swing/toolbar-buttonarrow.png： http://xio.iteye.com/upload/attachment/44097/f0b31625-ac6e-36a5-a5cd-d86bca96e72d.png

 

 

 

评论

1 楼 mikewang 2009-04-09  

做的，不错， 在给你你加个点击记忆功能
思路
1 每次点击菜单的时候保存这个菜单的index，并且出发菜单下表变更事件
2 在JPopupButton中 监听事件， 并调用attachActionOnPopupMenu 绑定点击按钮所执行的菜单

实现：
JPopupMenu 达不到要求， 需要改造一下

package info.mikewang.part.test;

import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ContainerEvent;
import java.awt.event.ContainerListener;
import java.util.Vector;

import javax.swing.AbstractButton;
import javax.swing.JPopupMenu;
import javax.swing.MenuElement;

class JPopupButtonMenu extends JPopupMenu {
	private static final long serialVersionUID = -8812143869773395718L;

	private int clickedMenuIndex = -1;

	public JPopupButtonMenu() {
		this(null);
	}

	public JPopupButtonMenu(String label) {
		super(label);
		addContainerListener(new XContainerListener());
	}

	public int getClickedMenuIndex() {
		return clickedMenuIndex;
	}

	public AbstractButton[] getSubClickedElements() {
		AbstractButton result[];
		Vector<AbstractButton> tmpx = new Vector<AbstractButton>();

		MenuElement tmp[] = getSubElements();
		for (MenuElement menuElement : tmp) {
			if (menuElement instanceof AbstractButton) {
				tmpx.add((AbstractButton) menuElement);
			}
		}

		result = new AbstractButton[tmpx.size()];
		for (int i = 0; i < tmpx.size(); i++) {
			result[i] = tmpx.elementAt(i);
		}

		return result;
	}

	// ----------------------------------

	class XContainerListener implements ContainerListener {

		@Override
		public void componentAdded(ContainerEvent e) {
			Component c = e.getChild();
			if (c instanceof AbstractButton) {
				((AbstractButton) c).addActionListener(new XActionListener());
			}
		}

		@Override
		public void componentRemoved(ContainerEvent e) {

		}
	}

	class XActionListener implements ActionListener {
		@Override
		public void actionPerformed(ActionEvent e) {
			AbstractButton ab = (AbstractButton) e.getSource();
			AbstractButton abs[] = getSubClickedElements();
			for (int i = 0; i < abs.length; i++) {
				if (ab == abs[i]) {
					int oldClickedMenuIndex = clickedMenuIndex;
					clickedMenuIndex = i;
					firePropertyChange("clickedMenuIndex", oldClickedMenuIndex, i);
					break;
				}
			}
		}
	}
}

JPopupButton 本部分都差不多， 就增加了一个属性监听器， 监听clickedMenuIndex， 并调用attachActionOnPopupMenu， 改变下标

private void initClickRemember() {
		menu.addPropertyChangeListener("clickedMenuIndex",
				new PropertyChangeListener() {
					@Override
					public void propertyChange(PropertyChangeEvent evt) {
						Integer ii = (Integer) evt.getNewValue();
						attachActionOnPopupMenu(ii.intValue());
					}
				});
	}