SWT 系统托盘

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.events.ShellListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.internal.win32.OS;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tray;
import org.eclipse.swt.widgets.TrayItem;

public class SystemTray extends Shell {

    /**
    * Launch the application
    *
    * @param args
    */
    public static void main(String args[]) {
        try {
            Display display = Display.getDefault();
            SystemTray shell = new SystemTray(display, SWT.SHELL_TRIM);
            shell.createSystemTray(shell);
            shell.open();
            shell.layout();
            while (!shell.isDisposed()) {
                if (!display.readAndDispatch())
                    display.sleep();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
    * Create the shell
    *
    * @param display
    * @param style
    */
    public SystemTray(Display display, int style) {
        super(display, style);
        createContents();
    }

    /**
    * Create contents of the window
    */
    protected void createContents() {
        setText("SWT Application");
        setSize(500, 375);

    }

    protected void checkSubclass() {
        // Disable the check that prevents subclassing of SWT components
    }

    public void createSystemTray(final Shell shell) {
        // 下面两句的效果是：在任务栏不显示
        final int hWnd = shell.handle;
        OS.SetWindowLong(hWnd, OS.GWL_EXSTYLE, OS.WS_EX_CAPTIONOKBTN);
        shell.addShellListener(new ShellListener() {
            public void shellDeactivated(org.eclipse.swt.events.ShellEvent e) {
                System.out.println("shellDeactivated");
            }

            public void shellActivated(org.eclipse.swt.events.ShellEvent e) {
                System.out.println("shellActivated");
            }

            public void shellClosed(org.eclipse.swt.events.ShellEvent e) {
                System.out.println("shellClosed");
            }

            /**
            * Sent when a shell is un-minimized.
            */
            public void shellDeiconified(org.eclipse.swt.events.ShellEvent e) {
                System.out.println("shellDeiconified");
            }

            /**
            * Sent when a shell is minimized. Shell 最小化后事件
            */
            public void shellIconified(org.eclipse.swt.events.ShellEvent e) {
                // 最小化时不显示在任务栏
                shell.setVisible(false);
                System.out.println("shell.setVisible(false);");
            }

        });

        Display display = shell.getDisplay();
        // Image image = new Image (display, 16, 16);
        Image image = new Image(display, "images/toc_closed.gif");
        final Tray tray = display.getSystemTray();
        final TrayItem trayItem = new TrayItem(tray, SWT.NONE);
        trayItem.setToolTipText("SWT TrayItem");
        trayItem.addListener(SWT.Show, new Listener() {
            public void handleEvent(Event event) {
                System.out.println("show");
            }
        });
        trayItem.addListener(SWT.Hide, new Listener() {
            public void handleEvent(Event event) {
                System.out.println("hide");
            }
        });

        // 托盘单击事件
        trayItem.addListener(SWT.Selection, new Listener() {

            public void handleEvent(Event event) {
                System.out.println("selection");
                // shell.setVisible(true);
                // shell.setMinimized(false);
            }
        });

        // 托盘双击事件
        trayItem.addListener(SWT.DefaultSelection, new Listener() {
            public void handleEvent(Event event) {
                System.out.println("default selection");
                shell.setVisible(true);
                shell.setMinimized(false);
            }
        });

        // 添加托盘右键菜单
        final Menu menu = new Menu(shell, SWT.POP_UP);

        MenuItem menuItemMaximize = new MenuItem(menu, SWT.PUSH);// 最大化菜单
        menuItemMaximize.setText("Maximize");
        menuItemMaximize.addSelectionListener(new SelectionListener() {
            public void widgetSelected(SelectionEvent e) {
                shell.setVisible(true);
                shell.setMaximized(true);
            }

            public void widgetDefaultSelected(SelectionEvent e) {
                // widgetSelected(e);
            }

        });

        MenuItem menuItemMinimize = new MenuItem(menu, SWT.PUSH);// 最小化菜单
        menuItemMinimize.setText("Minimize");
        menuItemMinimize.addSelectionListener(new SelectionListener() {
            public void widgetSelected(SelectionEvent e) {
                shell.setMinimized(true);
            }

            public void widgetDefaultSelected(SelectionEvent e) {
                // widgetSelected(e);
            }
        });

        new MenuItem(menu, SWT.SEPARATOR);// 分割条

        MenuItem menuItemClose = new MenuItem(menu, SWT.PUSH);// 关闭菜单
        menuItemClose.setText("Close");
        menuItemClose.addSelectionListener(new SelectionListener() {
            public void widgetDefaultSelected(SelectionEvent e) {
                Display.getCurrent().close();
            }

            public void widgetSelected(SelectionEvent e) {
                widgetDefaultSelected(e);
            }
        });

        trayItem.addListener(SWT.MenuDetect, new Listener() {
            public void handleEvent(Event event) {
                System.out.println("shell.isVisible():" + shell.isVisible());
                menu.setVisible(true);
                if (shell.isVisible()) {
                    menu.getItem(0).setEnabled(true);
                    menu.getItem(1).setEnabled(true);
                } else {
                    menu.getItem(0).setEnabled(true);
                    menu.getItem(1).setEnabled(false);
                }
            }
        });
        trayItem.setImage(image);

    }

}