# QSystemTrayIcon Class Reference
## [[QtGui](index.htm) module]
该QSystemTrayIcon类提供了在系统托盘中的应用程序的图标。[More...](#details)
继承[QObject](qobject.html)。
### Types
* `enum ActivationReason { Unknown, Context, DoubleClick, Trigger, MiddleClick }`
* `enum MessageIcon { NoIcon, Information, Warning, Critical }`
### Methods
* `__init__ (self, QObject parent = None)`
* `__init__ (self, QIcon icon, QObject parent = None)`
* `QMenu contextMenu (self)`
* `bool event (self, QEvent event)`
* `QRect geometry (self)`
* `hide (self)`
* `QIcon icon (self)`
* `bool isVisible (self)`
* `setContextMenu (self, QMenu menu)`
* `setIcon (self, QIcon icon)`
* `setToolTip (self, QString tip)`
* `setVisible (self, bool visible)`
* `show (self)`
* `showMessage (self, QString title, QString msg, MessageIcon icon = QSystemTrayIcon.Information, int msecs = 10000)`
* `QString toolTip (self)`
### Static Methods
* `bool isSystemTrayAvailable ()`
* `bool supportsMessages ()`
### Qt Signals
* `void activated (QSystemTrayIcon::ActivationReason)`
* `void messageClicked ()`
* * *
## Detailed Description
该QSystemTrayIcon类提供了在系统托盘中的应用程序的图标。
现代操作系统通常提供的特殊区域在桌面上，称为_system tray_ or _notification area_，其中长期运行的应用程序可以显示图标和短消息。
该QSystemTrayIcon类可以在以下平台上使用：
* All supported versions of Windows.
* All window managers for X11 that implement the [freedesktop.org](http://www.freedesktop.org/) system tray specification, including recent versions of KDE and GNOME.
* All supported versions of Mac OS X. Note that the Growl notification system must be installed for [QSystemTrayIcon.showMessage](qsystemtrayicon.html#showMessage)() to display messages.
要检查系统托盘是否存在在用户的桌面上，调用[QSystemTrayIcon.isSystemTrayAvailable](qsystemtrayicon.html#isSystemTrayAvailable)（ ）静态函数。
要添加一个系统托盘项，创建一个QSystemTrayIcon对象，调用[setContextMenu](qsystemtrayicon.html#setContextMenu)（ ）提供的图标的上下文菜单，并调用[show](qsystemtrayicon.html#show)（） ，使其在系统托盘中可见。状态通知邮件（ “气球消息” ）可以被使用在任何时间显示[showMessage](qsystemtrayicon.html#showMessage)（ ） 。
如果系统托盘不可用时，系统托盘图标的构造，但后来变为可用， QSystemTrayIcon会自动在系统托盘中的应用程序添加一个条目，如果图标[visible](qsystemtrayicon.html#visible-prop)。
该[activated](qsystemtrayicon.html#activated)当用户激活的图标（）信号被发射。
只有在X11上，在工具提示的要求， QSystemTrayIcon收到[QHelpEvent](qhelpevent.html)类型[QEvent.ToolTip](qevent.html#Type-enum)。此外， QSystemTrayIcon接收型滚轮事件[QEvent.Wheel](qevent.html#Type-enum)。这些不支持在任何其他平台。
* * *
## Type Documentation
```
QSystemTrayIcon.ActivationReason
```
这个枚举变量描述系统托盘被激活的原因。
| Constant | Value | Description |
| --- | --- | --- |
| `QSystemTrayIcon.Unknown` | `0` | 不明原因 |
| `QSystemTrayIcon.Context` | `1` | 要求系统托盘项中的上下文菜单 |
| `QSystemTrayIcon.DoubleClick` | `2` | 系统托盘条目被双击时 |
| `QSystemTrayIcon.Trigger` | `3` | 系统托盘项被点击 |
| `QSystemTrayIcon.MiddleClick` | `4` | 系统托盘项与单击鼠标中键 |
**See also** [activated](qsystemtrayicon.html#activated)（ ） 。
```
QSystemTrayIcon.MessageIcon
```
这个枚举描述显示气球消息时所显示的图标。
| Constant | Value | Description |
| --- | --- | --- |
| `QSystemTrayIcon.NoIcon` | `0` | 显示图标。 |
| `QSystemTrayIcon.Information` | `1` | 显示信息图标。 |
| `QSystemTrayIcon.Warning` | `2` | 显示一个标准的警告图标。 |
| `QSystemTrayIcon.Critical` | `3` | 显示的严重警告图标。 |
**See also** [QMessageBox](qmessagebox.html)。
* * *
## Method Documentation
```
QSystemTrayIcon.__init__ (self, QObject parent = None)
```
该_parent_的说法，如果不是没有，原因_self_通过Qt的，而不是PyQt的拥有。
构造一个[QSystemTrayIcon](qsystemtrayicon.html)与给定对象_parent_。
该图标是最初不可见的。
**See also** [visible](qsystemtrayicon.html#visible-prop)。
```
QSystemTrayIcon.__init__ (self, QIcon icon, QObject parent = None)
```
该_parent_的说法，如果不是没有，原因_self_通过Qt的，而不是PyQt的拥有。
构造一个[QSystemTrayIcon](qsystemtrayicon.html)与给定对象_icon_和_parent_。
该图标是最初不可见的。
**See also** [visible](qsystemtrayicon.html#visible-prop)。
```
QMenu QSystemTrayIcon.contextMenu (self)
```
[
返回系统托盘项中的当前上下文菜单。
](qmenu.html)
[**See also**](qmenu.html) [setContextMenu](qsystemtrayicon.html#setContextMenu)（ ） 。
```
bool QSystemTrayIcon.event (self, QEvent event)
```
从重新实现[QObject.event](qobject.html#event)（ ） 。
```
QRect QSystemTrayIcon.geometry (self)
```
[
返回屏幕坐标系统托盘图标的几何形状。
此功能被引入Qt的4.3 。
](qrect.html)
[**See also**](qrect.html) [visible](qsystemtrayicon.html#visible-prop)。
```
QSystemTrayIcon.hide (self)
```
这种方法也是一个Qt槽与C + +的签名`void hide()`。
隐藏系统托盘项。
**See also** [show](qsystemtrayicon.html#show)（）和[visible](qsystemtrayicon.html#visible-prop)。
```
QIcon QSystemTrayIcon.icon (self)
```
[
```
bool QSystemTrayIcon.isSystemTrayAvailable ()
```
返回True如果系统托盘可用，否则返回False 。
](qicon.html)
[如果系统盘是目前不可用，但后来变为可用，](qicon.html)[QSystemTrayIcon](qsystemtrayicon.html)会自动在系统托盘中添加一个条目，如果它是[visible](qsystemtrayicon.html#visible-prop)。
```
bool QSystemTrayIcon.isVisible (self)
```
```
QSystemTrayIcon.setContextMenu (self, QMenu menu)
```
设置指定_menu_是为系统托盘图标的上下文菜单。
用户请求的上下文菜单中单击鼠标按钮，系统托盘图标时，菜单会弹出。
在Mac OS X ，这是currenly转换为NSMenu ，所以aboutToHide （ ）信号未发出。
**Note:**系统托盘图标不会拿菜单的所有权。必须确保它被删除在适当的时间通过，例如，在创建菜单与合适的父对象。
**See also** [contextMenu](qsystemtrayicon.html#contextMenu)（ ） 。
```
QSystemTrayIcon.setIcon (self, QIcon icon)
```
```
QSystemTrayIcon.setToolTip (self, QString tip)
```
```
QSystemTrayIcon.setVisible (self, bool visible)
```
这种方法也是一个Qt槽与C + +的签名`void setVisible(bool)`。
```
QSystemTrayIcon.show (self)
```
这种方法也是一个Qt槽与C + +的签名`void show()`。
显示在系统托盘中的图标。
**See also** [hide](qsystemtrayicon.html#hide)（）和[visible](qsystemtrayicon.html#visible-prop)。
```
QSystemTrayIcon.showMessage (self, QString title, QString msg, MessageIcon icon = QSystemTrayIcon.Information, int msecs = 10000)
```
示出了与给定的条目气球消息_title_，_message_和_icon_在指定的时间_millisecondsTimeoutHint_。_title_和_message_必须是纯文本字符串。
消息可以由用户进行点击;的[messageClicked](qsystemtrayicon.html#messageClicked)当这种情况发生时（ ）信号会发出。
注意消息的显示依赖于系统配置和用户偏好，而且信息可能不会出现在所有。因此，不应被依赖作为提供重要信息的唯一手段。
在Windows上，_millisecondsTimeoutHint_通常被忽略的系统时，该应用程序具有焦点。
在Mac OS X ，低吼通知系统必须安装此功能来显示消息。
此功能被引入Qt的4.3 。
**See also** [show](qsystemtrayicon.html#show)（）和[supportsMessages](qsystemtrayicon.html#supportsMessages)（ ） 。
```
bool QSystemTrayIcon.supportsMessages ()
```
返回True如果系统托盘支持气球的消息，否则返回False 。
**See also** [showMessage](qsystemtrayicon.html#showMessage)（ ） 。
```
QString QSystemTrayIcon.toolTip (self)
```
* * *
## Qt Signal Documentation
```
void activated (QSystemTrayIcon::ActivationReason)
```
这是该信号的默认超载。
当用户激活系统托盘图标这个信号被发射。_reason_指定用于激活的原因。[QSystemTrayIcon.ActivationReason](qsystemtrayicon.html#ActivationReason-enum)列举的各种原因。
**See also** [QSystemTrayIcon.ActivationReason](qsystemtrayicon.html#ActivationReason-enum)。
```
void messageClicked ()
```
这是该信号的默认超载。
当使用显示的消息这个信号被发射[showMessage](qsystemtrayicon.html#showMessage)（）被点击的用户。
目前，这个信号没有在Mac OS X发送
**Note:**我们遵循微软Windows XP / Vista的行为，所以当用户点击并显示气球消息托盘图标的信号也被发射。
**See also** [activated](qsystemtrayicon.html#activated)（ ） 。
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- QStyleOptionFrameV3 Class Reference
- QStyleOptionGraphicsItem Class Reference
- QStyleOptionGroupBox Class Reference
- QStyleOptionHeader Class Reference
- QStyleOptionMenuItem Class Reference
- QStyleOptionProgressBar Class Reference
- QStyleOptionProgressBarV2 Class Reference
- QStyleOptionRubberBand Class Reference
- QStyleOptionSizeGrip Class Reference
- QStyleOptionSlider Class Reference
- QStyleOptionSpinBox Class Reference
- QStyleOptionTab Class Reference
- QStyleOptionTabBarBase Class Reference
- QStyleOptionTabBarBaseV2 Class Reference
- QStyleOptionTabV2 Class Reference
- QStyleOptionTabV3 Class Reference
- QStyleOptionTabWidgetFrame Class Reference
- QStyleOptionTabWidgetFrameV2 Class Reference
- QStyleOptionTitleBar Class Reference
- QStyleOptionToolBar Class Reference
- QStyleOptionToolBox Class Reference
- QStyleOptionToolBoxV2 Class Reference
- QStyleOptionToolButton Class Reference
- QStyleOptionViewItem Class Reference
- QStyleOptionViewItemV2 Class Reference
- QStyleOptionViewItemV3 Class Reference
- QStyleOptionViewItemV4 Class Reference
- QStylePainter Class Reference
- QSvgGenerator Class Reference
- QSvgRenderer Class Reference
- QSvgWidget Class Reference
- QSwipeGesture Class Reference
- QSyntaxHighlighter Class Reference
- QSysInfo Class Reference
- QSystemLocale Class Reference
- QSystemSemaphore Class Reference
- QSystemTrayIcon Class Reference
- Qt Class Reference
- QTabBar Class Reference
- QTabletEvent Class Reference
- QTableView Class Reference
- QTableWidget Class Reference
- QTableWidgetItem Class Reference
- QTableWidgetSelectionRange Class Reference
- QTabWidget Class Reference
- QTapAndHoldGesture Class Reference
- QTapGesture Class Reference
- QTcpServer Class Reference
- QTcpSocket Class Reference
- QTemporaryFile Class Reference
- QTest Class Reference
- QTextBlock Class Reference
- QTextBlockFormat Class Reference
- QTextBlockGroup Class Reference
- QTextBlockUserData Class Reference
- QTextBoundaryFinder Class Reference
- QTextBrowser Class Reference
- QTextCharFormat Class Reference
- QTextCodec Class Reference
- QTextCursor Class Reference
- QTextDecoder Class Reference
- QTextDocument Class Reference
- QTextDocumentFragment Class Reference
- QTextDocumentWriter Class Reference
- QTextEdit Class Reference
- QTextEncoder Class Reference
- QTextFormat Class Reference
- QTextFragment Class Reference
- QTextFrame Class Reference
- QTextFrameFormat Class Reference
- QTextImageFormat Class Reference
- QTextInlineObject Class Reference
- QTextItem Class Reference
- QTextLayout Class Reference
- QTextLength Class Reference
- QTextLine Class Reference
- QTextList Class Reference
- QTextListFormat Class Reference
- QTextObject Class Reference
- QTextObjectInterface Class Reference
- QTextOption Class Reference
- QTextStream Class Reference
- QTextTable Class Reference
- QTextTableCell Class Reference
- QTextTableCellFormat Class Reference
- QTextTableFormat Class Reference
- QThread Class Reference
- QThreadPool Class Reference
- QTime Class Reference
- QTimeEdit Class Reference
- QTimeLine Class Reference
- QTimer Class Reference
- QTimerEvent Class Reference
- QToolBar Class Reference
- QToolBox Class Reference
- QToolButton Class Reference
- QToolTip Class Reference
- QTouchEvent Class Reference
- Reference
- QTransform Class Reference
- QTranslator Class Reference
- QTreeView Class Reference
- QTreeWidget Class Reference
- QTreeWidgetItem Class Reference
- QTreeWidgetItemIterator Class Reference
- QUdpSocket Class Reference
- QUndoCommand Class Reference
- QUndoGroup Class Reference
- QUndoStack Class Reference
- QUndoView Class Reference
- QUrl Class Reference
- QUrlInfo Class Reference
- QUuid Class Reference
- QValidator Class Reference
- QVariant Class Reference
- QVariantAnimation Class Reference
- QVBoxLayout Class Reference
- QVector2D Class Reference
- QVector3D Class Reference
- QVector4D Class Reference
- QVideoFrame Class Reference
- QVideoSurfaceFormat Class Reference
- QWaitCondition Class Reference
- QWebDatabase Class Reference
- QWebElement Class Reference
- QWebElementCollection Class Reference
- QWebFrame Class Reference
- QWebHistory Class Reference
- QWebHistoryInterface Class Reference
- QWebHistoryItem Class Reference
- QWebHitTestResult Class Reference
- QWebInspector Class Reference
- QWebPage Class Reference
- QWebPluginFactory Class Reference
- QWebSecurityOrigin Class Reference
- QWebSettings Class Reference
- QWebView Class Reference
- QWhatsThis Class Reference
- QWhatsThisClickedEvent Class Reference
- QWheelEvent Class Reference
- QWidget Class Reference
- QWidgetAction Class Reference
- QWidgetItem Class Reference
- QWindowStateChangeEvent Class Reference
- QWizard Class Reference
- QWizardPage Class Reference
- QWorkspace Class Reference
- QWriteLocker Class Reference
- QX11EmbedContainer Class Reference
- QX11EmbedWidget Class Reference
- QX11Info Class Reference
- QXmlAttributes Class Reference
- QXmlContentHandler Class Reference
- QXmlDeclHandler Class Reference
- QXmlDefaultHandler Class Reference
- QXmlDTDHandler Class Reference
- QXmlEntityResolver Class Reference
- QXmlErrorHandler Class Reference
- QXmlFormatter Class Reference
- QXmlInputSource Class Reference
- QXmlItem Class Reference
- QXmlLexicalHandler Class Reference
- QXmlLocator Class Reference
- QXmlName Class Reference
- QXmlNamePool Class Reference
- QXmlNamespaceSupport Class Reference
- QXmlNodeModelIndex Class Reference
- QXmlParseException Class Reference
- QXmlQuery Class Reference
- QXmlReader Class Reference
- QXmlResultItems Class Reference
- QXmlSchema Class Reference
- QXmlSchemaValidator Class Reference
- QXmlSerializer Class Reference
- QXmlSimpleReader Class Reference
- QXmlStreamAttribute Class Reference
- QXmlStreamAttributes Class Reference
- QXmlStreamEntityDeclaration Class Reference
- QXmlStreamEntityResolver Class Reference
- QXmlStreamNamespaceDeclaration Class Reference
- QXmlStreamNotationDeclaration Class Reference
- QXmlStreamReader Class Reference
- QXmlStreamWriter Class Reference