# QStackedLayout Class Reference
## [[QtGui](index.htm) module]
该QStackedLayout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[QLayout](qlayout.html)。
### Types
* `enum StackingMode { StackOne, StackAll }`
### Methods
* `__init__ (self)`
* `__init__ (self, QWidget parent)`
* `__init__ (self, QLayout parentLayout)`
* `addItem (self, QLayoutItem item)`
* `int addWidget (self, QWidget w)`
* `int count (self)`
* `int currentIndex (self)`
* `QWidget currentWidget (self)`
* `int insertWidget (self, int index, QWidget w)`
* `QLayoutItem itemAt (self, int)`
* `QSize minimumSize (self)`
* `setCurrentIndex (self, int index)`
* `setCurrentWidget (self, QWidget w)`
* `setGeometry (self, QRect rect)`
* `setStackingMode (self, StackingMode stackingMode)`
* `QSize sizeHint (self)`
* `StackingMode stackingMode (self)`
* `QLayoutItem takeAt (self, int)`
* `QWidget widget (self, int)`
* `QWidget widget (self)`
### Qt Signals
* `void currentChanged (int)`
* `void widgetRemoved (int)`
* * *
## Detailed Description
该QStackedLayout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。
QStackedLayout可以用来创建类似于通过提供一个用户接口[QTabWidget](qtabwidget.html)。还有一个方便[QStackedWidget](qstackedwidget.html)类建立在QStackedLayout之上。
一个QStackedLayout可以填入一些子控件（ “页” ）的。例如：
```
[QWidget](qwidget.html) *firstPageWidget = new [QWidget](qwidget.html);
[QWidget](qwidget.html) *secondPageWidget = new [QWidget](qwidget.html);
[QWidget](qwidget.html) *thirdPageWidget = new [QWidget](qwidget.html);
QStackedLayout *stackedLayout = new QStackedLayout;
stackedLayout->addWidget(firstPageWidget);
stackedLayout->addWidget(secondPageWidget);
stackedLayout->addWidget(thirdPageWidget);
[QVBoxLayout](qvboxlayout.html) *mainLayout = new [QVBoxLayout](qvboxlayout.html);
mainLayout->addLayout(stackedLayout);
setLayout(mainLayout);
```
QStackedLayout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QStackedLayout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)),
stackedLayout, SLOT(setCurrentIndex(int)));
```
当填充布局，窗口小部件添加到内部列表。该[indexOf](qlayout.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](qstackedlayout.html#addWidget)（ ）函数，或者使用插入一个给定索引处的[insertWidget](qstackedlayout.html#insertWidget)（）函数。该[removeWidget](qlayout.html#removeWidget)（ ）函数移除插件的给定索引从布局的。包含在布局窗口小部件的数量，可使用所获得的[count](qstackedlayout.html#count-prop)（）函数。
该[widget](qstackedlayout.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](qstackedlayout.html#currentIndex-prop)（） ，并且可以使用被改变[setCurrentIndex](qstackedlayout.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](qstackedlayout.html#currentWidget)（）函数，并使用改变了[setCurrentWidget](qstackedlayout.html#setCurrentWidget)（）函数。
每当当前部件的布局的变化或窗口小部件是从布局中删除，则[currentChanged](qstackedlayout.html#currentChanged)（）和[widgetRemoved](qstackedlayout.html#widgetRemoved)（）信号被分别发射。
* * *
## Type Documentation
```
QStackedLayout.StackingMode
```
这个枚举变量指定的布局如何处理其对自己的知名度子部件。
| Constant | Value | Description |
| --- | --- | --- |
| `QStackedLayout.StackOne` | `0` | 只在当前窗口小部件是可见的。这是默认的。 |
| `QStackedLayout.StackAll` | `1` | 所有部件都是可见的。当前插件仅仅提高。 |
这个枚举被引入或修改的Qt 4.4 。
* * *
## Method Documentation
```
QStackedLayout.__init__ (self)
```
构造一个[QStackedLayout](qstackedlayout.html)没有父。
This [QStackedLayout](qstackedlayout.html)必须安装在稍后一个部件才能生效。
**See also** [addWidget](qstackedlayout.html#addWidget)（）和[insertWidget](qstackedlayout.html#insertWidget)（ ） 。
```
QStackedLayout.__init__ (self, QWidget parent)
```
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。
构造一个新的[QStackedLayout](qstackedlayout.html)用给定的_parent_。
这种布局将在自行安装_parent_小工具和管理其子的几何形状。
```
QStackedLayout.__init__ (self, QLayout parentLayout)
```
该_parentLayout_的说法，如果不是没有，原因_self_通过Qt的，而不是PyQt的拥有。
构造一个新的[QStackedLayout](qstackedlayout.html)并将其插入到给定的_parentLayout_。
```
QStackedLayout.addItem (self, QLayoutItem item)
```
该_item_说法有它的所有权转移给Qt的。
从重新实现[QLayout.addItem](qlayout.html#addItem)（ ） 。
```
int QStackedLayout.addWidget (self, QWidget w)
```
该_w_说法有它的所有权转移给Qt的。
将给定_widget_这一布局的结尾，并返回的索引位置_widget_。
如果[QStackedLayout](qstackedlayout.html)为空，此函数被调用之前，给定的_widget_成为当前窗口小部件。
**See also** [insertWidget](qstackedlayout.html#insertWidget)（ ）[removeWidget](qlayout.html#removeWidget)（）和[setCurrentWidget](qstackedlayout.html#setCurrentWidget)（ ） 。
```
int QStackedLayout.count (self)
```
```
int QStackedLayout.currentIndex (self)
```
```
QWidget QStackedLayout.currentWidget (self)
```
[
返回当前窗口小部件，或者0 ，如果有这个布局没有任何部件。
](qwidget.html)
[**See also**](qwidget.html) [currentIndex](qstackedlayout.html#currentIndex-prop)（）和[setCurrentWidget](qstackedlayout.html#setCurrentWidget)（ ） 。
```
int QStackedLayout.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_在这[QStackedLayout](qstackedlayout.html)。如果_index_超出范围，小部件被追加（在这种情况下，它是实际的指数_widget_即返回） 。
如果[QStackedLayout](qstackedlayout.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](qstackedlayout.html#addWidget)（ ）[removeWidget](qlayout.html#removeWidget)（）和[setCurrentWidget](qstackedlayout.html#setCurrentWidget)（ ） 。
```
QLayoutItem QStackedLayout.itemAt (self, int)
```
[](qlayoutitem.html)
[从重新实现](qlayoutitem.html)[QLayout.itemAt](qlayout.html#itemAt)（ ） 。
```
QSize QStackedLayout.minimumSize (self)
```
[](qsize.html)
[从重新实现](qsize.html)[QLayoutItem.minimumSize](qlayoutitem.html#minimumSize)（ ） 。
```
QStackedLayout.setCurrentIndex (self, int index)
```
这种方法也是一个Qt槽与C + +的签名`void setCurrentIndex(int)`。
```
QStackedLayout.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布局。
**See also** [setCurrentIndex](qstackedlayout.html#currentIndex-prop)（）和[currentWidget](qstackedlayout.html#currentWidget)（ ） 。
```
QStackedLayout.setGeometry (self, QRect rect)
```
从重新实现[QLayoutItem.setGeometry](qlayoutitem.html#setGeometry)（ ） 。
```
QStackedLayout.setStackingMode (self, StackingMode stackingMode)
```
```
QSize QStackedLayout.sizeHint (self)
```
[](qsize.html)
[从重新实现](qsize.html)[QLayoutItem.sizeHint](qlayoutitem.html#sizeHint)（ ） 。
```
StackingMode QStackedLayout.stackingMode (self)
```
[](qstackedlayout.html#StackingMode-enum)
```
QLayoutItem QStackedLayout.takeAt (self, int)
```
[
该_QLayoutItem_结果
](qlayoutitem.html)
[从重新实现](qlayoutitem.html)[QLayout.takeAt](qlayout.html#takeAt)（ ） 。
```
QWidget QStackedLayout.widget (self, int)
```
[
返回该插件在给定的_index_或0 ，如果没有插件在给定的位置上。
](qwidget.html)
[**See also**](qwidget.html) [currentWidget](qstackedlayout.html#currentWidget)（）和[indexOf](qlayout.html#indexOf)（ ） 。
```
QWidget QStackedLayout.widget (self)
```
[
* * *
## Qt Signal Documentation
```
void currentChanged (int)
```
这是该信号的默认超载。
](qwidget.html)
[这个信号被发射时的电流小部件在布局中的变化。该_index_指定新的当前部件的索引，或者-1，如果没有一个新的（例如，如果没有部件在](qwidget.html)[QStackedLayout](qstackedlayout.html)）
**See also** [currentWidget](qstackedlayout.html#currentWidget)（）和[setCurrentWidget](qstackedlayout.html#setCurrentWidget)（ ） 。
```
void widgetRemoved (int)
```
这是该信号的默认超载。
每当一个部件被从布局中删除这个信号被发射。 widget的_index_作为参数传递。
**See also** [removeWidget](qlayout.html#removeWidget)（ ） 。
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- 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