PySide.QtGui.QStackedLayout class provides a stack of widgets where only one widget is visible at a time.
PySide.QtGui.QStackedLayout can be used to create a user interface similar to the one provided by PySide.QtGui.QTabWidget 。还有方便 PySide.QtGui.QStackedWidget class built on top of PySide.QtGui.QStackedLayout .
A PySide.QtGui.QStackedLayout can be populated with a number of child widgets (“pages”). For example:
QWidget *firstPageWidget = new QWidget;
QWidget *secondPageWidget = new QWidget;
QWidget *thirdPageWidget = new QWidget;
QStackedLayout *stackedLayout = new QStackedLayout;
stackedLayout->addWidget(firstPageWidget);
stackedLayout->addWidget(secondPageWidget);
stackedLayout->addWidget(thirdPageWidget);
QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addLayout(stackedLayout);
setLayout(mainLayout);
PySide.QtGui.QStackedLayout provides no intrinsic means for the user to switch page. This is typically done through a PySide.QtGui.QComboBox 或 PySide.QtGui.QListWidget that stores the titles of the PySide.QtGui.QStackedLayout ‘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)),
stackedLayout, SLOT(setCurrentIndex(int)));
当填充布局时，Widget 会被添加到内部列表中。 PySide.QtGui.QLayout.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 PySide.QtGui.QStackedLayout.addWidget() function, or inserted at a given index using the PySide.QtGui.QStackedLayout.insertWidget() function. The PySide.QtGui.QLayout.removeWidget() function removes the widget at the given index from the layout. The number of widgets contained in the layout, can be obtained using the PySide.QtGui.QStackedLayout.count() 函数。
PySide.QtGui.QStackedLayout.widget() function returns the widget at a given index position. The index of the widget that is shown on screen is given by PySide.QtGui.QStackedLayout.currentIndex() and can be changed using PySide.QtGui.QStackedLayout.setCurrentIndex() . In a similar manner, the currently shown widget can be retrieved using the PySide.QtGui.QStackedLayout.currentWidget() function, and altered using the PySide.QtGui.QStackedLayout.setCurrentWidget() 函数。
Whenever the current widget in the layout changes or a widget is removed from the layout, the PySide.QtGui.QStackedLayout.currentChanged() and PySide.QtGui.QStackedLayout.widgetRemoved() signals are emitted respectively.
| 参数： |
|
|---|
构造 PySide.QtGui.QStackedLayout with no parent.
This PySide.QtGui.QStackedLayout must be installed on a widget later on to become effective.
另请参阅
PySide.QtGui.QStackedLayout.addWidget() PySide.QtGui.QStackedLayout.insertWidget()
构造新 PySide.QtGui.QStackedLayout 并将其插入给定 parentLayout .
构造新 PySide.QtGui.QStackedLayout 采用给定 parent .
This layout will install itself on the parent widget and manage the geometry of its children.
This enum specifies how the layout handles its child widgets regarding their visibility.
| 常量 | 描述 |
|---|---|
| QStackedLayout.StackOne | Only the current widget is visible. This is the default. |
| QStackedLayout.StackAll | All widgets are visible. The current widget is merely raised. |
| 参数： | index – PySide.QtCore.int |
|---|
| 返回类型： | PySide.QtCore.int |
|---|
This property holds the index position of the widget that is visible.
当前索引为 -1，若没有当前 Widget。
| 返回类型： | PySide.QtGui.QWidget |
|---|
Returns the current widget, or 0 if there are no widgets in this layout.
| 参数： |
|
|---|---|
| 返回类型： |
PySide.QtCore.int |
Inserts the given widget at the given index in this PySide.QtGui.QStackedLayout 。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 PySide.QtGui.QStackedLayout is 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
PySide.QtGui.QStackedLayout.addWidget() PySide.QtGui.QLayout.removeWidget() PySide.QtGui.QStackedLayout.setCurrentWidget()
| 参数： | index – PySide.QtCore.int |
|---|
This property holds the index position of the widget that is visible.
当前索引为 -1，若没有当前 Widget。
| 参数： | w – PySide.QtGui.QWidget |
|---|
Sets the current widget to be the specified widget . The new current widget must already be contained in this stacked layout.
| 参数： | stackingMode – PySide.QtGui.QStackedLayout.StackingMode |
|---|
This property determines the way visibility of child widgets are handled..
默认值为 StackOne . Setting the property to StackAll allows you to make use of the layout for overlay widgets that do additional drawing on top of other widgets, for example, graphical editors.
| 返回类型： | PySide.QtGui.QStackedLayout.StackingMode |
|---|
This property determines the way visibility of child widgets are handled..
默认值为 StackOne . Setting the property to StackAll allows you to make use of the layout for overlay widgets that do additional drawing on top of other widgets, for example, graphical editors.
| 参数： | arg__1 – PySide.QtCore.int |
|---|---|
| 返回类型： | PySide.QtGui.QWidget |
返回 Widget 在给定 index , or 0 if there is no widget at the given position.
| 参数： | index – PySide.QtCore.int |
|---|