Question

org.eclipse.swt.widgets.MenuItem怎么设置一个退出的功能

就是点击这个菜单的时候退出当前程序

Answer 1

主要是重载ApplicationWorkbenchWindowAdvisor.java中的方法：
/**
* ApplicationWorkbenchWindowAdvisor.java
*/
package com.mi.pwdgate;

import org.eclipse.swt.graphics.Point;
import org.eclipse.ui.IWorkbenchPreferenceConstants;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.application.ActionBarAdvisor;
import org.eclipse.ui.application.IActionBarConfigurer;
import org.eclipse.ui.application.IWorkbenchWindowConfigurer;
import org.eclipse.ui.application.WorkbenchWindowAdvisor;

import com.mi.pwdgate.util.SystemTrayMaster;

public class ApplicationWorkbenchWindowAdvisor extends WorkbenchWindowAdvisor {

private SystemTrayMaster trayMaster;
/*
* (non-Javadoc)
*
* @see org.eclipse.ui.application.WorkbenchWindowAdvisor#postWindowOpen()
*/
public void postWindowOpen() {
createSystemTray();
}

private void createSystemTray() {
trayMaster = new SystemTrayMaster();
trayMaster.createSystemTray();
}

/*
* (non-Javadoc)
* @see org.eclipse.ui.application.WorkbenchWindowAdvisor#preWindowShellClose()
* <span style="color: #ff0000;">按窗口右上角X关闭毁老</span>

*/
public boolean preWindowShellClose() {
System.out.println("shell going to closed!");
trayMaster.minimizeWindow();
return false;
}

/*
* (non-Javadoc)
* @see org.eclipse.ui.application.WorkbenchWindowAdvisor#postWindowClose()
* <span style="color: #ff0000;">所有关闭窗口的事件都从这里走，收尾工作的代码在这消饥里写</span>纤桥升

*/
public void postWindowClose() {
System.out.println("closed!");
}

}

/**
* SystemTrayMaster.java
*/
package com.mi.pwdgate.util;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Image;
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;
import org.eclipse.ui.PlatformUI;

/**
* @author moneyice 2006-5-9
*/
public class SystemTrayMaster implements SelectionListener, Listener {
private final class RestoreWindowListener extends SelectionAdapter {
public void widgetSelected(SelectionEvent e) {
restoreWindow();
}
}

private Menu menu;

private MenuItem[] menuItems = new MenuItem[0];

private RestoreWindowListener restoreWindowListener;

public SystemTrayMaster() {
this.restoreWindowListener = new RestoreWindowListener();
}

// Closes the Application
protected void closeApplication() {
PlatformUI.getWorkbench().close();
}

// click the tray
public void widgetSelected(SelectionEvent e) {
}

// double click the tray
public void widgetDefaultSelected(SelectionEvent e) {
restoreWindow();
}

// Gets system shell
private Shell getShell() {
return PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
}

// Minimizes the Window
public void minimizeWindow() {
getShell().setMinimized(true);
getShell().setVisible(false);
}

// Restores the window
protected void restoreWindow() {
Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow()
.getShell();
shell.open();
shell.setMinimized(false);
shell.forceActive();
shell.forceFocus();
}

public void showMenu() {
clearItems();
MenuItem openItem;
MenuItem closeItem;
openItem = new MenuItem(this.menu, SWT.PUSH);
closeItem = new MenuItem(this.menu, SWT.NONE);
closeItem.setText("Close");
closeItem.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
closeApplication();
}
});
this.menuItems = new MenuItem[] { openItem, closeItem };

openItem.setText("Open Password Gate");
openItem.addSelectionListener(this.restoreWindowListener);
this.menu.setVisible(true);
}

private void clearItems() {
for (int i = 0; i < this.menuItems.length; i++) {
MenuItem item = this.menuItems[i];
item.removeSelectionListener(this.restoreWindowListener);
this.menuItems[i].dispose();
}
}

public void handleEvent(Event event) {
showMenu();
}

public void createSystemTray() {
// Gets system tray
Tray tray = Display.getDefault().getSystemTray();
// Creates tray item
TrayItem item = new TrayItem(tray, SWT.NONE);
item.setText("Password Gate");
item.setToolTipText("Password Gate");
// Sets image for tray
Image image = ImageShop.get("default");
item.setImage(image);

item.addSelectionListener(this);
item.addListener(SWT.MenuDetect, this);

menu = new Menu(getShell(), SWT.POP_UP);
}
}

Answer 2

MenuItem mExit = new MenuItem(menu_1, SWT.NONE);
mExit.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
System.exit(0);
}
});

Answer 3

System.exit(0);//关闭整个程序，就连其余线程都要死。