QStackedWidget Class Reference
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QtGui

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The QStackedWidget class provides a stack of widgets where only one widget is visible at a time. 更多...

继承 QFrame .

方法

__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)

详细描述

The QStackedWidget class provides a stack of widgets where only one widget is visible at a time.

QStackedWidget can be used to create a user interface similar to the one provided by QTabWidget . It is a convenience layout widget built on top of the QStackedLayout 类。

像 QStackedLayout , QStackedWidget can be constructed and populated with a number of child widgets ("pages"):

     QWidget *firstPageWidget = new QWidget;
     QWidget *secondPageWidget = new QWidget;
     QWidget *thirdPageWidget = new QWidget;
     QStackedWidget *stackedWidget = new QStackedWidget;
     stackedWidget->addWidget(firstPageWidget);
     stackedWidget->addWidget(secondPageWidget);
     stackedWidget->addWidget(thirdPageWidget);
     QVBoxLayout *layout = new QVBoxLayout;
     layout->addWidget(stackedWidget);
     setLayout(layout);

QStackedWidget provides no intrinsic means for the user to switch page. This is typically done through a QComboBox 或 QListWidget that stores the titles of the QStackedWidget's pages. For example:

     QComboBox *pageComboBox = new QComboBox;
     pageComboBox->addItem(tr("Page 1"));
     pageComboBox->addItem(tr("Page 2"));
     pageComboBox->addItem(tr("Page 3"));
     connect(pageComboBox, SIGNAL(activated(int)),
             stackedWidget, SLOT(setCurrentIndex(int)));

When populating a stacked widget, the widgets are added to an internal list. The indexOf () function returns the index of a widget in that list. The widgets can either be added to the end of the list using the addWidget () function, or inserted at a given index using the insertWidget () 函数。 removeWidget () function removes a widget from the stacked widget. The number of widgets contained in the stacked widget, can be obtained using the count () 函数。

widget () function returns the widget at a given index position. The index of the widget that is shown on screen is given by currentIndex () and can be changed using setCurrentIndex (). In a similar manner, the currently shown widget can be retrieved using the currentWidget () function, and altered using the setCurrentWidget () 函数。

Whenever the current widget in the stacked widget changes or a widget is removed from the stacked widget, the currentChanged () 和 widgetRemoved () signals are emitted respectively.

方法文档编制

QStackedWidget.init ( self , QWidget parent = None)

parent argument, if not None, causes self to be owned by Qt instead of PyQt.

构造 QStackedWidget with the given parent .

另请参阅 addWidget () 和 insertWidget ().

int QStackedWidget.addWidget ( self , QWidget w )

w argument has it's ownership transferred to Qt.

Appends the given widget 到 QStackedWidget and returns the index position. Ownership of widget 被传递给 QStackedWidget .

若 QStackedWidget is empty before this function is called, widget becomes the current 小部件。

另请参阅 insertWidget (), removeWidget ()，和 setCurrentWidget ().

int QStackedWidget.count ( self )

int QStackedWidget.currentIndex ( self )

QWidget QStackedWidget.currentWidget ( self )

Returns the current widget, or 0 if there are no child widgets.

另请参阅 currentIndex () 和 setCurrentWidget ().

bool QStackedWidget.event ( self , QEvent e )

重实现自 QObject.event ().

int QStackedWidget.indexOf ( self , QWidget )

Returns the index of the given widget , or -1 if the given widget is not a child of the QStackedWidget .

另请参阅 currentIndex () 和 widget ().

int QStackedWidget.insertWidget ( self , int index , QWidget w )

w argument has it's ownership transferred to Qt.

Inserts the given widget at the given index 在 QStackedWidget . Ownership of widget 被传递给 QStackedWidget 。若 index is out of range, the widget is appended (in which case it is the actual index of the widget that is returned).

若 QStackedWidget was empty before this function is called, the given widget becomes the current widget.

Inserting a new widget at an index less than or equal to the current index will increment the current index, but keep the current widget.

另请参阅 addWidget (), removeWidget ()，和 setCurrentWidget ().

QStackedWidget.removeWidget ( self , QWidget w )

移除 widget 从 QStackedWidget . i.e., widget is not deleted but simply removed from the stacked layout, causing it to be hidden.

注意： Ownership of widget reverts to the 应用程序。

另请参阅 addWidget (), insertWidget ()，和 currentWidget ().

QStackedWidget.setCurrentIndex ( self , int index )

This method is also a Qt slot with the C++ signature void setCurrentIndex(int) .

QStackedWidget.setCurrentWidget ( self , QWidget w )

This method is also a Qt slot with the C++ signature void setCurrentWidget(QWidget*) .

Sets the current widget to be the specified widget 。 new current widget must already be contained in this stacked 小部件。

另请参阅 currentWidget () 和 setCurrentIndex ().

QWidget QStackedWidget.widget ( self , int)

返回 Widget 在给定 index , or 0 if there is no such widget.

另请参阅 currentWidget () 和 indexOf ().

QStackedWidget.len ( self )

Qt Signal Documentation

void currentChanged (int)

This is the default overload of this signal.

This signal is emitted whenever the current widget changes.

The parameter holds the index of the new current widget, or -1 if there isn't a new one (for example, if there are no widgets in the QStackedWidget ).

另请参阅 currentWidget () 和 setCurrentWidget ().

void widgetRemoved (int)