本机菜单示例：窗口和应用程序菜单 (AIR)Adobe AIR 1.0 和更高版本 以下示例创建在本机菜单结构 (AIR)中显示的菜单。 此菜单在设计上可同时用于 Windows（仅支持窗口菜单）和 Mac OS X（仅支持应用程序菜单）。为进行区分，MenuExample 类构造函数将检查 NativeWindow 和 NativeApplication 类的静态 supportsMenu 属性。如果 NativeWindow.supportsMenu 为 true，则该构造函数将为窗口创建 NativeMenu 对象，然后创建和添加“File”（文件）和“Edit”（编辑）子菜单。如果 NativeApplication.supportsMenu 为 true，则该构造函数将创建“File”（文件）和“Edit”（编辑）菜单，并将它们添加到 Mac OS X 操作系统所提供的现有菜单中。 本示例还将说明菜单事件的处理过程。select 事件在项目级别以及菜单级别进行处理。从包含所选项的菜单到根菜单的菜单链中的每个菜单都将响应 select 事件。displaying 事件与“Open Recent”（最近打开的项目）菜单一起使用。在打开菜单之前，将以最新的 Documents 数组（在此示例中实际上不发生更改）刷新菜单中的项目。尽管此示例中不显示，但还可以在个别项目上侦听 displaying 事件。 package {
import flash.display.NativeMenu;
import flash.display.NativeMenuItem;
import flash.display.NativeWindow;
import flash.display.Sprite;
import flash.events.Event;
import flash.filesystem.File;
import flash.desktop.NativeApplication;
public class MenuExample extends Sprite
{
private var recentDocuments:Array =
new Array(new File("app-storage:/GreatGatsby.pdf"),
new File("app-storage:/WarAndPeace.pdf"),
new File("app-storage:/Iliad.pdf"));
public function MenuExample()
{
var fileMenu:NativeMenuItem;
var editMenu:NativeMenuItem;
if (NativeWindow.supportsMenu){
stage.nativeWindow.menu = new NativeMenu();
stage.nativeWindow.menu.addEventListener(Event.SELECT, selectCommandMenu);
fileMenu = stage.nativeWindow.menu.addItem(new NativeMenuItem("File"));
fileMenu.submenu = createFileMenu();
editMenu = stage.nativeWindow.menu.addItem(new NativeMenuItem("Edit"));
editMenu.submenu = createEditMenu();
}
if (NativeApplication.supportsMenu){
NativeApplication.nativeApplication.menu.addEventListener(Event.SELECT, selectCommandMenu);
fileMenu = NativeApplication.nativeApplication.menu.addItem(new NativeMenuItem("File"));
fileMenu.submenu = createFileMenu();
editMenu = NativeApplication.nativeApplication.menu.addItem(new NativeMenuItem("Edit"));
editMenu.submenu = createEditMenu();
}
}
public function createFileMenu():NativeMenu {
var fileMenu:NativeMenu = new NativeMenu();
fileMenu.addEventListener(Event.SELECT, selectCommandMenu);
var newCommand:NativeMenuItem = fileMenu.addItem(new NativeMenuItem("New"));
newCommand.addEventListener(Event.SELECT, selectCommand);
var saveCommand:NativeMenuItem = fileMenu.addItem(new NativeMenuItem("Save"));
saveCommand.addEventListener(Event.SELECT, selectCommand);
var openRecentMenu:NativeMenuItem =
fileMenu.addItem(new NativeMenuItem("Open Recent"));
openRecentMenu.submenu = new NativeMenu();
openRecentMenu.submenu.addEventListener(Event.DISPLAYING,
updateRecentDocumentMenu);
openRecentMenu.submenu.addEventListener(Event.SELECT, selectCommandMenu);
return fileMenu;
}
public function createEditMenu():NativeMenu {
var editMenu:NativeMenu = new NativeMenu();
editMenu.addEventListener(Event.SELECT, selectCommandMenu);
var copyCommand:NativeMenuItem = editMenu.addItem(new NativeMenuItem("Copy"));
copyCommand.addEventListener(Event.SELECT, selectCommand);
copyCommand.keyEquivalent = "c";
var pasteCommand:NativeMenuItem =
editMenu.addItem(new NativeMenuItem("Paste"));
pasteCommand.addEventListener(Event.SELECT, selectCommand);
pasteCommand.keyEquivalent = "v";
editMenu.addItem(new NativeMenuItem("", true));
var preferencesCommand:NativeMenuItem =
editMenu.addItem(new NativeMenuItem("Preferences"));
preferencesCommand.addEventListener(Event.SELECT, selectCommand);
return editMenu;
}
private function updateRecentDocumentMenu(event:Event):void {
trace("Updating recent document menu.");
var docMenu:NativeMenu = NativeMenu(event.target);
for each (var item:NativeMenuItem in docMenu.items) {
docMenu.removeItem(item);
}
for each (var file:File in recentDocuments) {
var menuItem:NativeMenuItem =
docMenu.addItem(new NativeMenuItem(file.name));
menuItem.data = file;
menuItem.addEventListener(Event.SELECT, selectRecentDocument);
}
}
private function selectRecentDocument(event:Event):void {
trace("Selected recent document: " + event.target.data.name);
}
private function selectCommand(event:Event):void {
trace("Selected command: " + event.target.label);
}
private function selectCommandMenu(event:Event):void {
if (event.currentTarget.parent != null) {
var menuItem:NativeMenuItem =
findItemForMenu(NativeMenu(event.currentTarget));
if (menuItem != null) {
trace("Select event for \"" +
event.target.label +
"\" command handled by menu: " +
menuItem.label);
}
} else {
trace("Select event for \"" +
event.target.label +
"\" command handled by root menu.");
}
}
private function findItemForMenu(menu:NativeMenu):NativeMenuItem {
for each (var item:NativeMenuItem in menu.parent.items) {
if (item != null) {
if (item.submenu == menu) {
return item;
}
}
}
return null;
}
}
}
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