QStackedWidget

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

Inheritance diagram of PySide2.QtWidgets.QStackedWidget

Synopsis

Functions

Slots

Signals

Detailed Description

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 class.

Like QStackedLayout , QStackedWidget can be constructed and populated with a number of child widgets (“pages”):

firstPageWidget =  QWidget()
secondPageWidget =  QWidget()
thirdPageWidget =  QWidget()

stackedWidget =  QStackedWidget()
stackedWidget.addWidget(firstPageWidget)
stackedWidget.addWidget(secondPageWidget)
stackedWidget.addWidget(thirdPageWidget)

layout =  QVBoxLayout()
layout.addWidget(stackedWidget)
setLayout(layout)

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

pageComboBox = QComboBox()
pageComboBox.addItem(tr("Page 1"))
pageComboBox.addItem(tr("Page 2"))
pageComboBox.addItem(tr("Page 3"))
pageComboBox.activated[int].connect(stackedWidget.setCurrentIndex)

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() function. The removeWidget() function removes a widget from the stacked widget. The number of widgets contained in the stacked widget can be obtained using the count() function.

The 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() function.

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

class PySide2.QtWidgets.QStackedWidget([parent=None])

Constructs a QStackedWidget with the given parent .

PySide2.QtWidgets.QStackedWidget.addWidget(w)
Parameters

wPySide2.QtWidgets.QWidget

Return type

int

Appends the given widget to the QStackedWidget and returns the index position. Ownership of widget is passed on to the QStackedWidget .

If the QStackedWidget is empty before this function is called, widget becomes the current widget.

PySide2.QtWidgets.QStackedWidget.count()
Return type

int

This property holds the number of widgets contained by this stacked widget.

By default, this property contains a value of 0.

PySide2.QtWidgets.QStackedWidget.currentChanged(arg__1)
Parameters

arg__1 – int

PySide2.QtWidgets.QStackedWidget.currentIndex()
Return type

int

This property holds the index position of the widget that is visible.

The current index is -1 if there is no current widget.

By default, this property contains a value of -1 because the stack is initially empty.

PySide2.QtWidgets.QStackedWidget.currentWidget()
Return type

PySide2.QtWidgets.QWidget

Returns the current widget, or None if there are no child widgets.

PySide2.QtWidgets.QStackedWidget.indexOf(arg__1)
Parameters

arg__1PySide2.QtWidgets.QWidget

Return type

int

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

PySide2.QtWidgets.QStackedWidget.insertWidget(index, w)
Parameters
Return type

int

Inserts the given widget at the given index in the QStackedWidget . Ownership of widget is passed on to the QStackedWidget . If index is out of range, the widget is appended (in which case it is the actual index of the widget that is returned).

If the 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.

PySide2.QtWidgets.QStackedWidget.removeWidget(w)
Parameters

wPySide2.QtWidgets.QWidget

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

Note

Parent object and parent widget of widget will remain the QStackedWidget . If the application wants to reuse the removed widget , then it is recommended to re-parent it.

PySide2.QtWidgets.QStackedWidget.setCurrentIndex(index)
Parameters

index – int

This property holds the index position of the widget that is visible.

The current index is -1 if there is no current widget.

By default, this property contains a value of -1 because the stack is initially empty.

PySide2.QtWidgets.QStackedWidget.setCurrentWidget(w)
Parameters

wPySide2.QtWidgets.QWidget

Sets the current widget to be the specified widget . The new current widget must already be contained in this stacked widget.

PySide2.QtWidgets.QStackedWidget.widget(arg__1)
Parameters

arg__1 – int

Return type

PySide2.QtWidgets.QWidget

Returns the widget at the given index , or None if there is no such widget.

PySide2.QtWidgets.QStackedWidget.widgetRemoved(index)
Parameters

index – int