# QStatusBar Class Reference
## [[QtGui](index.htm) module]
該QStatusBar類提供適合呈現狀態信息的單槓。[More...](#details)
繼承[QWidget](qwidget.html)。
### Methods
* `__init__ (self, QWidget?parent?=?None)`
* `addPermanentWidget (self, QWidget?widget, int?stretch?=?0)`
* `addWidget (self, QWidget?widget, int?stretch?=?0)`
* `clearMessage (self)`
* `QString currentMessage (self)`
* `bool event (self, QEvent)`
* `hideOrShow (self)`
* `int insertPermanentWidget (self, int?index, QWidget?widget, int?stretch?=?0)`
* `int insertWidget (self, int?index, QWidget?widget, int?stretch?=?0)`
* `bool isSizeGripEnabled (self)`
* `paintEvent (self, QPaintEvent)`
* `reformat (self)`
* `removeWidget (self, QWidget?widget)`
* `resizeEvent (self, QResizeEvent)`
* `setSizeGripEnabled (self, bool)`
* `showEvent (self, QShowEvent)`
* `showMessage (self, QString?message, int?msecs?=?0)`
### Qt Signals
* `void messageChanged (const QString&)`
* * *
## Detailed Description
該QStatusBar類提供適合呈現狀態信息的單槓。
每一個狀態指示燈分為三類:
* _Temporary_ - briefly occupies most of the status bar. Used to explain tool tip texts or menu entries, for example.
* _Normal_ - occupies part of the status bar and may be hidden by temporary messages. Used to display the page and line number in a word processor, for example.
* _Permanent_ - is never hidden. Used for important mode indications, for example, some applications put a Caps Lock indicator in the status bar.
QStatusBar可以顯示所有三種類型的指標。
通常情況下,狀態欄功能的請求時就某[QMainWindow](qmainwindow.html)對象。[QMainWindow](qmainwindow.html)提供了一個主應用程序窗口,帶有菜單欄,工具欄,停靠小部件_and_圍繞一個大型的中央部件的狀態欄。狀態欄可使用的檢索[QMainWindow.statusBar](qmainwindow.html#statusBar)()函數,并使用替代的[QMainWindow.setStatusBar](qmainwindow.html#setStatusBar)()函數。
使用[showMessage](qstatusbar.html#showMessage)()槽,以顯示_temporary_消息:
```
void MainWindow.createStatusBar()
{
statusBar()->showMessage(tr("Ready"));
}
```
要刪除一個臨時消息,使用[clearMessage](qstatusbar.html#clearMessage)()槽,或調用時,設置一個時間限制[showMessage](qstatusbar.html#showMessage)( ) 。例如:
```
void MainWindow.print()
{
#ifndef QT_NO_PRINTDIALOG
[QTextDocument](qtextdocument.html) *document = textEdit->document();
[QPrinter](qprinter.html) printer;
[QPrintDialog](qprintdialog.html) *dlg = new [QPrintDialog](qprintdialog.html)(&printer, this);
if (dlg->exec() != [QDialog](qdialog.html).Accepted)
return;
document->print(&printer);
statusBar()->showMessage(tr("Ready"), 2000);
#endif
}
```
使用[currentMessage](qstatusbar.html#currentMessage)( )函數來檢索當前顯示的臨時消息。該QStatusBar類還提供了[messageChanged](qstatusbar.html#messageChanged)( )這是發射時的臨時狀態信息變化的信號。
_Normal_和_Permanent_消息顯示通過創建一個小部件([QLabel](qlabel.html),[QProgressBar](qprogressbar.html)甚至[QToolButton](qtoolbutton.html)) ,然后用其添加到狀態欄[addWidget](qstatusbar.html#addWidget)()或[addPermanentWidget](qstatusbar.html#addPermanentWidget)()函數。使用[removeWidget](qstatusbar.html#removeWidget)( )函數從狀態欄中刪除此類消息。
```
statusBar()->addWidget(new MyReadWriteIndication);
```
默認情況下QStatusBar提供[QSizeGrip](qsizegrip.html)在右下角。您可以使用禁用的[setSizeGripEnabled](qstatusbar.html#sizeGripEnabled-prop)()函數。使用[isSizeGripEnabled](qstatusbar.html#sizeGripEnabled-prop)( )函數來確定大小手柄的當前狀態。

* * *
## Method Documentation
```
QStatusBar.__init__ (self, QWidget?parent?=?None)
```
該_parent_的說法,如果不是沒有,原因_self_通過Qt的,而不是PyQt的擁有。
構造一個狀態欄有一個大小的抓地力和給定_parent_。
**See also** [setSizeGripEnabled](qstatusbar.html#sizeGripEnabled-prop)( ) 。
```
QStatusBar.addPermanentWidget (self, QWidget?widget, int?stretch?=?0)
```
該_widget_說法有它的所有權轉移給Qt的。
將給定_widget_永久這個狀態欄,重定父級的小工具,如果它已經不這樣子[QStatusBar](qstatusbar.html)對象。該_stretch_參數被用來計算一個合適的尺寸對于給定的_widget_作為狀態欄的增長和收縮。默認拉伸系數為0,即給插件最小的空間。
永久意味著該插件可能無法被臨時消息遮蔽。它位于狀態欄的最右邊。
**See also** [insertPermanentWidget](qstatusbar.html#insertPermanentWidget)( )[removeWidget](qstatusbar.html#removeWidget)()和[addWidget](qstatusbar.html#addWidget)( ) 。
```
QStatusBar.addWidget (self, QWidget?widget, int?stretch?=?0)
```
該_widget_說法有它的所有權轉移給Qt的。
將給定_widget_這個狀態欄,重定父級的小工具,如果它已經不這樣子[QStatusBar](qstatusbar.html)對象。該_stretch_參數被用來計算一個合適的尺寸對于給定的_widget_作為狀態欄的增長和收縮。默認拉伸系數為0,即給插件最小的空間。
窗口小部件是位于最左側的第一個永久部件(見[addPermanentWidget](qstatusbar.html#addPermanentWidget)()) ,并且可以通過臨時的消息遮蔽。
**See also** [insertWidget](qstatusbar.html#insertWidget)( )[removeWidget](qstatusbar.html#removeWidget)()和[addPermanentWidget](qstatusbar.html#addPermanentWidget)( ) 。
```
QStatusBar.clearMessage (self)
```
這種方法也是一個Qt槽與C + +的簽名`void clearMessage()`。
刪除正在顯示的任何臨時消息。
**See also** [currentMessage](qstatusbar.html#currentMessage)( )[showMessage](qstatusbar.html#showMessage)()和[removeWidget](qstatusbar.html#removeWidget)( ) 。
```
QString QStatusBar.currentMessage (self)
```
如果沒有這樣的消息返回當前顯示的臨時消息,或空字符串。
**See also** [showMessage](qstatusbar.html#showMessage)( ) 。
```
bool QStatusBar.event (self, QEvent)
```
從重新實現[QObject.event](qobject.html#event)( ) 。
```
QStatusBar.hideOrShow (self)
```
確保正確的窗口小部件是可見的。
所使用的[showMessage](qstatusbar.html#showMessage)()和[clearMessage](qstatusbar.html#clearMessage)()函數。
```
int QStatusBar.insertPermanentWidget (self, int?index, QWidget?widget, int?stretch?=?0)
```
該_widget_說法有它的所有權轉移給Qt的。
插入給定_widget_在給定的_index_永久這個狀態欄,重定父級的小工具,如果它已經不這樣子[QStatusBar](qstatusbar.html)對象。如果_index_超出范圍,小部件被追加(在這種情況下它是返回的widget的實際索引) 。
該_stretch_參數被用來計算一個合適的尺寸對于給定的_widget_作為狀態欄的增長和收縮。默認拉伸系數為0,即給插件最小的空間。
永久意味著該插件可能無法被臨時消息遮蔽。它位于狀態欄的最右邊。
這個函數中引入了Qt 4.2中。
**See also** [addPermanentWidget](qstatusbar.html#addPermanentWidget)( )[removeWidget](qstatusbar.html#removeWidget)()和[addWidget](qstatusbar.html#addWidget)( ) 。
```
int QStatusBar.insertWidget (self, int?index, QWidget?widget, int?stretch?=?0)
```
該_widget_說法有它的所有權轉移給Qt的。
插入給定_widget_在給定的_index_這個狀態欄,重定父級的小工具,如果它已經不這樣子[QStatusBar](qstatusbar.html)對象。如果_index_超出范圍,小部件被追加(在這種情況下它是返回的widget的實際索引) 。
該_stretch_參數被用來計算一個合適的尺寸對于給定的_widget_作為狀態欄的增長和收縮。默認拉伸系數為0,即給插件最小的空間。
窗口小部件是位于最左側的第一個永久部件(見[addPermanentWidget](qstatusbar.html#addPermanentWidget)()) ,并且可以通過臨時的消息遮蔽。
這個函數中引入了Qt 4.2中。
**See also** [addWidget](qstatusbar.html#addWidget)( )[removeWidget](qstatusbar.html#removeWidget)()和[addPermanentWidget](qstatusbar.html#addPermanentWidget)( ) 。
```
bool QStatusBar.isSizeGripEnabled (self)
```
```
QStatusBar.paintEvent (self, QPaintEvent)
```
從重新實現[QWidget.paintEvent](qwidget.html#paintEvent)( ) 。
示出了臨時消息,如果合適,響應于所述涂料_event_。
```
QStatusBar.reformat (self)
```
改變狀態欄的外觀佔項目變更。
特殊的子類可能需要該功能,但幾何管理通常會采取任何必要重排的照顧。
```
QStatusBar.removeWidget (self, QWidget?widget)
```
刪除指定的_widget_從狀態欄。
**Note:**此功能不會刪除該組件,但是_hides_它。再次添加窗口小部件,你必須調用兩個[addWidget](qstatusbar.html#addWidget)()和[show](qwidget.html#show)()函數。
**See also** [addWidget](qstatusbar.html#addWidget)( )[addPermanentWidget](qstatusbar.html#addPermanentWidget)()和[clearMessage](qstatusbar.html#clearMessage)( ) 。
```
QStatusBar.resizeEvent (self, QResizeEvent)
```
從重新實現[QWidget.resizeEvent](qwidget.html#resizeEvent)( ) 。
```
QStatusBar.setSizeGripEnabled (self, bool)
```
```
QStatusBar.showEvent (self, QShowEvent)
```
從重新實現[QWidget.showEvent](qwidget.html#showEvent)( ) 。
```
QStatusBar.showMessage (self, QString?message, int?msecs?=?0)
```
這種方法也是一個Qt槽與C + +的簽名`void showMessage(const QString&,int = 0)`。
隱藏在正常狀態指示,并顯示給定的_message_為毫秒(指定數目_timeout_) 。如果_timeout_為0 (默認),_message_保持顯示,直到[clearMessage](qstatusbar.html#clearMessage)( )槽被調用,或者直到showMessage ()槽被再次調用來更改消息。
需要注意的是showMessage ( )被調用,以顯示工具提示文本的臨時解釋,所以傳遞_timeout_0不足以顯示[permanent message](qstatusbar.html#permanent-message)。
**See also** [messageChanged](qstatusbar.html#messageChanged)( )[currentMessage](qstatusbar.html#currentMessage)()和[clearMessage](qstatusbar.html#clearMessage)( ) 。
* * *
## Qt Signal Documentation
```
void messageChanged (const QString&)
```
這是該信號的默認超載。
這個信號被發射時的臨時狀態信息變化。新的臨時消息傳遞的_message_參數是一個空字符串時,該消息已被刪除。
**See also** [showMessage](qstatusbar.html#showMessage)()和[clearMessage](qstatusbar.html#clearMessage)( ) 。
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- QScriptSyntaxCheckResult Class Reference
- QScriptValue Class Reference
- QScriptValueIterator Class Reference
- QScrollArea Class Reference
- QScrollBar Class Reference
- QSemaphore Class Reference
- QSequentialAnimationGroup Class Reference
- QSessionManager Class Reference
- QSettings Class Reference
- QSharedMemory Class Reference
- QShortcut Class Reference
- QShortcutEvent Class Reference
- QShowEvent Class Reference
- QSignalMapper Class Reference
- QSignalTransition Class Reference
- QSimpleXmlNodeModel Class Reference
- QSize Class Reference
- QSizeF Class Reference
- QSizeGrip Class Reference
- QSizePolicy Class Reference
- QSlider Class Reference
- QSocketNotifier Class Reference
- QSortFilterProxyModel Class Reference
- QSound Class Reference
- QSourceLocation Class Reference
- QSpacerItem Class Reference
- QSpinBox Class Reference
- QSplashScreen Class Reference
- QSplitter Class Reference
- QSplitterHandle Class Reference
- QSql Class Reference
- QSqlDatabase Class Reference
- QSqlDriver Class Reference
- QSqlDriverCreatorBase Class Reference
- QSqlError Class Reference
- QSqlField Class Reference
- QSqlIndex Class Reference
- QSqlQuery Class Reference
- QSqlQueryModel Class Reference
- QSqlRecord Class Reference
- QSqlRelation Class Reference
- QSqlRelationalDelegate Class Reference
- QSqlRelationalTableModel Class Reference
- QSqlResult Class Reference
- QSqlTableModel Class Reference
- Qt4.7文檔翻譯:Qt樣式單參考,Qt Style Sheets Reference
- QSsl Class Reference
- QSslCertificate Class Reference
- QSslCipher Class Reference
- QSslConfiguration Class Reference
- QSslError Class Reference
- QSslKey Class Reference
- QSslSocket Class Reference
- QStackedLayout Class Reference
- QStackedWidget Class Reference
- QStandardItem Class Reference
- QStandardItemModel Class Reference
- QState Class Reference
- QStateMachine Class Reference
- QStaticText Class Reference
- QStatusBar Class Reference
- QStatusTipEvent Class Reference
- QString Class Reference
- QStringList Class Reference
- QStringListModel Class Reference
- QStringMatcher Class Reference
- QStringRef Class Reference
- QStyle Class Reference
- QStyledItemDelegate Class Reference
- QStyleFactory Class Reference
- QStyleHintReturn Class Reference
- QStyleHintReturnMask Class Reference
- QStyleHintReturnVariant Class Reference
- QStyleOption Class Reference
- QStyleOptionButton Class Reference
- QStyleOptionComboBox Class Reference
- QStyleOptionComplex Class Reference
- QStyleOptionDockWidget Class Reference
- QStyleOptionDockWidgetV2 Class Reference
- QStyleOptionFocusRect Class Reference
- QStyleOptionFrame Class Reference
- QStyleOptionFrameV2 Class Reference
- 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