# QStackedWidget Class Reference
## [[QtGui](index.htm) module]
該QStackedWidget類提供了一個堆疊部件,其中只有一個小部件是可見的時間的。[More...](#details)
繼承[QFrame](qframe.html)。
### Methods
* `__init__ (self, QWidget?parent?=?None)`
* `int addWidget (self, QWidget?w)`
* `int count (self)`
* `int currentIndex (self)`
* `QWidget currentWidget (self)`
* `bool event (self, QEvent?e)`
* `int indexOf (self, QWidget)`
* `int insertWidget (self, int?index, QWidget?w)`
* `removeWidget (self, QWidget?w)`
* `setCurrentIndex (self, int?index)`
* `setCurrentWidget (self, QWidget?w)`
* `QWidget widget (self, int)`
### Special Methods
* `__len__ (self)`
### Qt Signals
* `void currentChanged (int)`
* `void widgetRemoved (int)`
* * *
## Detailed Description
該QStackedWidget類提供了一個堆疊部件,其中只有一個小部件是可見的時間的。
QStackedWidget可以用來創建類似于通過提供一個用戶接口[QTabWidget](qtabwidget.html)。它是建立在頂部的便利布局小部件[QStackedLayout](qstackedlayout.html)類。
喜歡[QStackedLayout](qstackedlayout.html), QStackedWidget可以構造并填充了一系列子控件( “頁” )中:
```
[QWidget](qwidget.html) *firstPageWidget = new [QWidget](qwidget.html);
[QWidget](qwidget.html) *secondPageWidget = new [QWidget](qwidget.html);
[QWidget](qwidget.html) *thirdPageWidget = new [QWidget](qwidget.html);
QStackedWidget *stackedWidget = new QStackedWidget;
stackedWidget->addWidget(firstPageWidget);
stackedWidget->addWidget(secondPageWidget);
stackedWidget->addWidget(thirdPageWidget);
[QVBoxLayout](qvboxlayout.html) *layout = new [QVBoxLayout](qvboxlayout.html);
layout->addWidget(stackedWidget);
setLayout(layout);
```
QStackedWidget沒有提供內在的手段來切換頁面的用戶。這通常是通過做[QComboBox](qcombobox.html)或[QListWidget](qlistwidget.html)用于存儲QStackedWidget的頁面的標題。例如:
```
[QComboBox](qcombobox.html) *pageComboBox = new [QComboBox](qcombobox.html);
pageComboBox->addItem(tr("Page 1"));
pageComboBox->addItem(tr("Page 2"));
pageComboBox->addItem(tr("Page 3"));
connect(pageComboBox, SIGNAL(activated(int)),
stackedWidget, SLOT(setCurrentIndex(int)));
```
當填充堆疊部件,該部件被添加到內部列表。該[indexOf](qstackedwidget.html#indexOf)( )函數返回在該列表中一個部件的指標。窗口小部件可以被使用添加到該列表的末尾的[addWidget](qstackedwidget.html#addWidget)( )函數,或者使用插入一個給定索引處的[insertWidget](qstackedwidget.html#insertWidget)()函數。該[removeWidget](qstackedwidget.html#removeWidget)( )函數會移除堆疊部件一個部件。包含在堆疊部件的部件的數量,可使用所獲得的[count](qstackedwidget.html#count-prop)()函數。
該[widget](qstackedwidget.html#widget)( )函數返回的部件在給定的索引位置。這顯示在屏幕上的小部件的指數由下式給出[currentIndex](qstackedwidget.html#currentIndex-prop)() ,并且可以使用被改變[setCurrentIndex](qstackedwidget.html#currentIndex-prop)( ) 。以類似的方式,將當前顯示的窗口小部件可以使用被檢索的[currentWidget](qstackedwidget.html#currentWidget)()函數,并使用改變了[setCurrentWidget](qstackedwidget.html#setCurrentWidget)()函數。
每當當前部件的疊層部件的改變或一個部件被從堆疊的部件移除時,[currentChanged](qstackedwidget.html#currentChanged)()和[widgetRemoved](qstackedwidget.html#widgetRemoved)()信號被分別發射。
* * *
## Method Documentation
```
QStackedWidget.__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[QStackedWidget](qstackedwidget.html)用給定的_parent_。
**See also** [addWidget](qstackedwidget.html#addWidget)()和[insertWidget](qstackedwidget.html#insertWidget)( ) 。
```
int QStackedWidget.addWidget (self, QWidget?w)
```
該_w_說法有它的所有權轉移給Qt的。
添加給定的_widget_到[QStackedWidget](qstackedwidget.html)并返回索引位置。所有權_widget_到傳遞[QStackedWidget](qstackedwidget.html)。
如果[QStackedWidget](qstackedwidget.html)為空,此函數被調用之前,_widget_成為當前窗口小部件。
**See also** [insertWidget](qstackedwidget.html#insertWidget)( )[removeWidget](qstackedwidget.html#removeWidget)()和[setCurrentWidget](qstackedwidget.html#setCurrentWidget)( ) 。
```
int QStackedWidget.count (self)
```
```
int QStackedWidget.currentIndex (self)
```
```
QWidget QStackedWidget.currentWidget (self)
```
[
返回當前窗口小部件,或者0 ,如果沒有子控件。
](qwidget.html)
[**See also**](qwidget.html) [currentIndex](qstackedwidget.html#currentIndex-prop)()和[setCurrentWidget](qstackedwidget.html#setCurrentWidget)( ) 。
```
bool QStackedWidget.event (self, QEvent?e)
```
從重新實現[QObject.event](qobject.html#event)( ) 。
```
int QStackedWidget.indexOf (self, QWidget)
```
返回給定索引_widget_,或-1,如果給定的_widget_不是的孩子[QStackedWidget](qstackedwidget.html)。
**See also** [currentIndex](qstackedwidget.html#currentIndex-prop)()和[widget](qstackedwidget.html#widget)( ) 。
```
int QStackedWidget.insertWidget (self, int?index, QWidget?w)
```
該_w_說法有它的所有權轉移給Qt的。
插入給定_widget_在給定的_index_在[QStackedWidget](qstackedwidget.html)。所有權_widget_到傳遞[QStackedWidget](qstackedwidget.html)。如果_index_超出范圍時,_widget_追加(在這種情況下,它是實際的指數_widget_即返回) 。
如果[QStackedWidget](qstackedwidget.html)為空,此函數被調用之前,給定的_widget_成為當前窗口小部件。
插入一個新的widget指數小于或等于當前的索引處將增加當前索引,但保持當前的窗口小部件。
**See also** [addWidget](qstackedwidget.html#addWidget)( )[removeWidget](qstackedwidget.html#removeWidget)()和[setCurrentWidget](qstackedwidget.html#setCurrentWidget)( ) 。
```
QStackedWidget.removeWidget (self, QWidget?w)
```
移除_widget_從[QStackedWidget](qstackedwidget.html)。即,_widget_ is _not_刪除,但簡單地從層疊布局除去,導致它被隱藏。
**Note:**所有權_widget_恢復到應用程序。
**See also** [addWidget](qstackedwidget.html#addWidget)( )[insertWidget](qstackedwidget.html#insertWidget)()和[currentWidget](qstackedwidget.html#currentWidget)( ) 。
```
QStackedWidget.setCurrentIndex (self, int?index)
```
這種方法也是一個Qt槽與C + +的簽名`void setCurrentIndex(int)`。
```
QStackedWidget.setCurrentWidget (self, QWidget?w)
```
這種方法也是一個Qt槽與C + +的簽名`void setCurrentWidget(QWidget *)`。
設置當前窗口小部件被指定_widget_。新的當前窗口小部件必須已經包含在這個堆疊部件。
**See also** [currentWidget](qstackedwidget.html#currentWidget)()和[setCurrentIndex](qstackedwidget.html#currentIndex-prop)( ) 。
```
QWidget QStackedWidget.widget (self, int)
```
[
返回該插件在給定的_index_或0,如果不存在這樣的窗口小部件。
](qwidget.html)
[**See also**](qwidget.html) [currentWidget](qstackedwidget.html#currentWidget)()和[indexOf](qstackedwidget.html#indexOf)( ) 。
```
QStackedWidget.__len__ (self)
```
* * *
## Qt Signal Documentation
```
void currentChanged (int)
```
這是該信號的默認超載。
這個信號被發射時的電流小窗口改變。
該參數保存_index_新的當前窗口小部件,或者為-1 ,如果沒有一個新的(例如,如果沒有部件在[QStackedWidget](qstackedwidget.html)) 。
**See also** [currentWidget](qstackedwidget.html#currentWidget)()和[setCurrentWidget](qstackedwidget.html#setCurrentWidget)( ) 。
```
void widgetRemoved (int)
```
這是該信號的默認超載。
每當一個部件被去除這個信號被發射。 widget的_index_作為參數傳遞。
**See also** [removeWidget](qstackedwidget.html#removeWidget)( ) 。
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- 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