# QStackedWidget Class Reference
## [[QtGui](index.htm) module]
该QStackedWidget类提供了一个堆叠部件，其中只有一个小部件是可见的时间的。[More...](#details)
继承[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
该QStackedWidget类提供了一个堆叠部件，其中只有一个小部件是可见的时间的。
QStackedWidget可以用来创建类似于通过提供一个用户接口[QTabWidget](qtabwidget.html)。它是建立在顶部的便利布局小部件[QStackedLayout](qstackedlayout.html)类。
喜欢[QStackedLayout](qstackedlayout.html)， QStackedWidget可以构造并填充了一系列子控件（ “页” ）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没有提供内在的手段来切换页面的用户。这通常是通过做[QComboBox](qcombobox.html)或[QListWidget](qlistwidget.html)用于存储QStackedWidget的页面的标题。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)));
```
当填充堆叠部件，该部件被添加到内部列表。该[indexOf](qstackedwidget.html#indexOf)（ ）函数返回在该列表中一个部件的指标。窗口小部件可以被使用添加到该列表的末尾的[addWidget](qstackedwidget.html#addWidget)（ ）函数，或者使用插入一个给定索引处的[insertWidget](qstackedwidget.html#insertWidget)（）函数。该[removeWidget](qstackedwidget.html#removeWidget)（ ）函数会移除堆叠部件一个部件。包含在堆叠部件的部件的数量，可使用所获得的[count](qstackedwidget.html#count-prop)（）函数。
该[widget](qstackedwidget.html#widget)（ ）函数返回的部件在给定的索引位置。这显示在屏幕上的小部件的指数由下式给出[currentIndex](qstackedwidget.html#currentIndex-prop)（） ，并且可以使用被改变[setCurrentIndex](qstackedwidget.html#currentIndex-prop)（ ） 。以类似的方式，将当前显示的窗口小部件可以使用被检索的[currentWidget](qstackedwidget.html#currentWidget)（）函数，并使用改变了[setCurrentWidget](qstackedwidget.html#setCurrentWidget)（）函数。
每当当前部件的叠层部件的改变或一个部件被从堆叠的部件移除时，[currentChanged](qstackedwidget.html#currentChanged)（）和[widgetRemoved](qstackedwidget.html#widgetRemoved)（）信号被分别发射。
* * *
## Method Documentation
```
QStackedWidget.__init__ (self, QWidget 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[QStackedWidget](qstackedwidget.html)用给定的_parent_。
**See also** [addWidget](qstackedwidget.html#addWidget)（）和[insertWidget](qstackedwidget.html#insertWidget)（ ） 。
```
int QStackedWidget.addWidget (self, QWidget w)
```
该_w_说法有它的所有权转移给Qt的。
添加给定的_widget_到[QStackedWidget](qstackedwidget.html)并返回索引位置。所有权_widget_到传递[QStackedWidget](qstackedwidget.html)。
如果[QStackedWidget](qstackedwidget.html)为空，此函数被调用之前，_widget_成为当前窗口小部件。
**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)
```
[
返回当前窗口小部件，或者0 ，如果没有子控件。
](qwidget.html)
[**See also**](qwidget.html) [currentIndex](qstackedwidget.html#currentIndex-prop)（）和[setCurrentWidget](qstackedwidget.html#setCurrentWidget)（ ） 。
```
bool QStackedWidget.event (self, QEvent e)
```
从重新实现[QObject.event](qobject.html#event)（ ） 。
```
int QStackedWidget.indexOf (self, QWidget)
```
返回给定索引_widget_，或-1，如果给定的_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)
```
该_w_说法有它的所有权转移给Qt的。
插入给定_widget_在给定的_index_在[QStackedWidget](qstackedwidget.html)。所有权_widget_到传递[QStackedWidget](qstackedwidget.html)。如果_index_超出范围时，_widget_追加（在这种情况下，它是实际的指数_widget_即返回） 。
如果[QStackedWidget](qstackedwidget.html)为空，此函数被调用之前，给定的_widget_成为当前窗口小部件。
插入一个新的widget指数小于或等于当前的索引处将增加当前索引，但保持当前的窗口小部件。
**See also** [addWidget](qstackedwidget.html#addWidget)（ ）[removeWidget](qstackedwidget.html#removeWidget)（）和[setCurrentWidget](qstackedwidget.html#setCurrentWidget)（ ） 。
```
QStackedWidget.removeWidget (self, QWidget w)
```
移除_widget_从[QStackedWidget](qstackedwidget.html)。即，_widget_ is _not_删除，但简单地从层叠布局除去，导致它被隐藏。
**Note:**所有权_widget_恢复到应用程序。
**See also** [addWidget](qstackedwidget.html#addWidget)（ ）[insertWidget](qstackedwidget.html#insertWidget)（）和[currentWidget](qstackedwidget.html#currentWidget)（ ） 。
```
QStackedWidget.setCurrentIndex (self, int index)
```
这种方法也是一个Qt槽与C + +的签名`void setCurrentIndex(int)`。
```
QStackedWidget.setCurrentWidget (self, QWidget w)
```
这种方法也是一个Qt槽与C + +的签名`void setCurrentWidget(QWidget *)`。
设置当前窗口小部件被指定_widget_。新的当前窗口小部件必须已经包含在这个堆叠部件。
**See also** [currentWidget](qstackedwidget.html#currentWidget)（）和[setCurrentIndex](qstackedwidget.html#currentIndex-prop)（ ） 。
```
QWidget QStackedWidget.widget (self, int)
```
[
返回该插件在给定的_index_或0，如果不存在这样的窗口小部件。
](qwidget.html)
[**See also**](qwidget.html) [currentWidget](qstackedwidget.html#currentWidget)（）和[indexOf](qstackedwidget.html#indexOf)（ ） 。
```
QStackedWidget.__len__ (self)
```
* * *
## Qt Signal Documentation
```
void currentChanged (int)
```
这是该信号的默认超载。
这个信号被发射时的电流小窗口改变。
该参数保存_index_新的当前窗口小部件，或者为-1 ，如果没有一个新的（例如，如果没有部件在[QStackedWidget](qstackedwidget.html)） 。
**See also** [currentWidget](qstackedwidget.html#currentWidget)（）和[setCurrentWidget](qstackedwidget.html#setCurrentWidget)（ ） 。
```
void widgetRemoved (int)
```
这是该信号的默认超载。
每当一个部件被去除这个信号被发射。 widget的_index_作为参数传递。
**See also** [removeWidget](qstackedwidget.html#removeWidget)（ ） 。
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- QTcpSocket Class Reference
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- 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