add tray first
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docs-translations/zh-CN/api/tray.md
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docs-translations/zh-CN/api/tray.md
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# Tray
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用一个 `Tray` 来表示一个图标,这个图标处于正在运行的系统的通知区 ,通常被添加到一个 context menu 上.
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```javascript
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const electron = require('electron');
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const app = electron.app;
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const Menu = electron.Menu;
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const Tray = electron.Tray;
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var appIcon = null;
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app.on('ready', function(){
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appIcon = new Tray('/path/to/my/icon');
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var contextMenu = Menu.buildFromTemplate([
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{ label: 'Item1', type: 'radio' },
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{ label: 'Item2', type: 'radio' },
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{ label: 'Item3', type: 'radio', checked: true },
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{ label: 'Item4', type: 'radio' }
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]);
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appIcon.setToolTip('This is my application.');
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appIcon.setContextMenu(contextMenu);
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});
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```
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__平台限制:__
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* 在 Linux, 如果支持应用指示器则使用它,否则使用 `GtkStatusIcon` 代替.
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* 在 Linux ,配置了只有有了应用指示器的支持, 你必须安装 `libappindicator1` 来让 tray icon 执行.
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* 应用指示器只有在它拥有 context menu 时才会显示.
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* 当在linux 上使用了应用指示器,将忽略点击事件.
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* 在 Linux,为了让单独的 `MenuItem` 起效,需要再次调用 `setContextMenu` .例如:
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```javascript
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contextMenu.items[2].checked = false;
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appIcon.setContextMenu(contextMenu);
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```
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如果想在所有平台保持完全相同的行为,不应该依赖点击事件,而是一直将一个 context menu 添加到 tray icon.
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## Class: Tray
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`Tray` 是一个 [事件发出者][event-emitter].
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### `new Tray(image)`
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* `image` [NativeImage](native-image.md)
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创建一个与 `image` 相关的 icon.
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## 事件
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`Tray` 模块可发出下列事件:
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**注意:** 一些事件只能在特定的os中运行,已经标明.
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### Event: 'click'
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* `event` Event
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* `altKey` Boolean
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* `shiftKey` Boolean
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* `ctrlKey` Boolean
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* `metaKey` Boolean
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* `bounds` Object - tray icon 的 bounds.
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* `x` Integer
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* `y` Integer
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* `width` Integer
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* `height` Integer
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当tray icon被点击的时候发出事件.
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__注意:__ `bounds` 只在 OS X 和 Windows 上起效.
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### Event: 'right-click' _OS X_ _Windows_
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* `event` Event
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* `altKey` Boolean
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* `shiftKey` Boolean
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* `ctrlKey` Boolean
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* `metaKey` Boolean
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* `bounds` Object - tray icon 的 bounds.
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* `x` Integer
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* `y` Integer
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* `width` Integer
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* `height` Integer
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当tray icon被鼠标右键点击的时候发出事件.
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### Event: 'double-click' _OS X_ _Windows_
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* `event` Event
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* `altKey` Boolean
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* `shiftKey` Boolean
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* `ctrlKey` Boolean
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* `metaKey` Boolean
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* `bounds` Object - tray icon 的 bounds.
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* `x` Integer
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* `y` Integer
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* `width` Integer
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* `height` Integer
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当tray icon被双击的时候发出事件.
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### Event: 'balloon-show' _Windows_
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当tray 气泡显示的时候发出事件.
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### Event: 'balloon-click' _Windows_
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当tray 气泡被点击的时候发出事件.
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### Event: 'balloon-closed' _Windows_
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当tray 气泡关闭的时候发出事件,因为超时或人为关闭.
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### Event: 'drop' _OS X_
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当tray icon上的任何可拖动项被删除的时候发出事件.
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### Event: 'drop-files' _OS X_
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* `event`
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* `files` Array - 已删除文件的路径.
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当tray icon上的可拖动文件被删除的时候发出事件.
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### Event: 'drag-enter' _OS X_
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当一个拖动操作进入tray icon的时候发出事件.
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### Event: 'drag-leave' _OS X_
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当一个拖动操作离开tray icon的时候发出事件.
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Emitted when a drag operation exits the tray icon.
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### Event: 'drag-end' _OS X_
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当一个拖动操作在tray icon上或其它地方停止拖动的时候发出事件.
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## 方法
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`Tray` 模块有以下方法:
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**Note:** 一些方法只能在特定的os中运行,已经标明.
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### `Tray.destroy()`
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立刻删除 tray icon.
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### `Tray.setImage(image)`
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* `image` [NativeImage](native-image.md)
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让 `image` 与 tray icon 关联起来.
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### `Tray.setPressedImage(image)` _OS X_
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* `image` [NativeImage](native-image.md)
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当在 OS X 上按压 tray icon 的时候, 让 `image` 与 tray icon 关联起来.
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### `Tray.setToolTip(toolTip)`
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* `toolTip` String
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为 tray icon 设置 hover text.
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### `Tray.setTitle(title)` _OS X_
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* `title` String
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在状态栏沿着 tray icon 设置标题.
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### `Tray.setHighlightMode(highlight)` _OS X_
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* `highlight` Boolean
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当 tray icon 被点击的时候,是否设置它的背景色变为高亮(blue).默认为 true.
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### `Tray.displayBalloon(options)` _Windows_
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* `options` Object
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* `icon` [NativeImage](native-image.md)
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* `title` String
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* `content` String
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展示一个 tray balloon.
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### `Tray.popUpContextMenu([menu, position])` _OS X_ _Windows_
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* `menu` Menu (optional)
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* `position` Object (可选) - 上托位置.
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* `x` Integer
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* `y` Integer
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从 tray icon 上托出 context menu . 当划过 `menu` 的时候, `menu` 显示,代替 tray 的 context menu .
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`position` 只在 windows 上可用,默认为 (0, 0) .
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### `Tray.setContextMenu(menu)`
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* `menu` Menu
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为这个 icon 设置 context menu .
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[event-emitter]: http://nodejs.org/api/events.html#events_class_events_eventemitter
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