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java.lang.Objectcom.trolltech.qt.internal.QSignalEmitterInternal
com.trolltech.qt.QSignalEmitter
com.trolltech.qt.QtJambiObject
com.trolltech.qt.core.QObject
com.trolltech.qt.gui.QLayout
com.trolltech.qt.gui.QStackedLayout
public class QStackedLayout
The QStackedLayout
class provides a stack of widgets where only one widget is visible at a time. QStackedLayout
can be used to create a user interface similar to the one provided by QTabWidget
. There is also a convenience QStackedWidget
class built on top of QStackedLayout
.
A 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);
QStackedLayout
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 QStackedLayout
's pages. For example: QComboBox pageComboBox = new QComboBox(); pageComboBox.addItem(tr("Page 1")); pageComboBox.addItem(tr("Page 2")); pageComboBox.addItem(tr("Page 3")); pageComboBox.activated.connect(stackedLayout, "setCurrentIndex(int)");When populating a layout, 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 the widget at the given index from the layout. The number of widgets contained in the layout, 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 layout changes or a widget is removed from the layout, the currentChanged()
and widgetRemoved()
signals are emitted respectively.
QStackedWidget
, and QTabWidget
.
Nested Class Summary | |
---|---|
static class |
QStackedLayout.StackingMode
This enum specifies how the layout handles its child widgets regarding their visibility. |
Nested classes/interfaces inherited from class com.trolltech.qt.gui.QLayout |
---|
QLayout.SizeConstraint |
Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter |
---|
QSignalEmitter.AbstractSignal, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9 |
Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
---|
com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal |
Field Summary | |
---|---|
QSignalEmitter.Signal1 |
currentChanged
This signal takes 1 generic argument(s). |
QSignalEmitter.Signal1 |
widgetRemoved
This signal takes 1 generic argument(s). |
Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
---|
currentSender |
Constructor Summary | |
---|---|
QStackedLayout()
Constructs a QStackedLayout with no parent. |
|
QStackedLayout(QLayout parentLayout)
Constructs a new QStackedLayout and inserts it into the given parentLayout. |
|
QStackedLayout(QWidget parent)
Constructs a new QStackedLayout with the given parent. |
Method Summary | |
---|---|
int |
addStackedWidget(QWidget w)
Adds the given widget to the end of this layout and returns the index position of the widget. |
int |
currentIndex()
This property holds the index position of the widget that is visible. |
QWidget |
currentWidget()
Returns the current widget, or 0 if there are no widgets in this layout. |
int |
insertWidget(int index,
QWidget w)
Inserts the given widget at the given index in this QStackedLayout . |
void |
setCurrentIndex(int index)
This property holds the index position of the widget that is visible. |
void |
setCurrentWidget(QWidget w)
Sets the current widget to be the specified widget. |
void |
setStackingMode(QStackedLayout.StackingMode stackingMode)
This property determines the way visibility of child widgets are handled. |
QStackedLayout.StackingMode |
stackingMode()
This property determines the way visibility of child widgets are handled. |
QWidget |
widget(int arg__1)
Returns the widget at the given index, or 0 if there is no widget at the given position. |
Methods inherited from class com.trolltech.qt.gui.QLayout |
---|
activate, addChildLayout, addChildWidget, addItem, addWidget, alignment, alignmentRect, closestAcceptableSize, contentsRect, controlTypes, count, expandingDirections, geometry, getContentsMargins, hasHeightForWidth, heightForWidth, indexOf, invalidate, isEmpty, isEnabled, itemAt, layout, maximumSize, menuBar, minimumHeightForWidth, minimumSize, parentWidget, removeItem, removeWidget, setAlignment, setAlignment, setAlignment, setAlignment, setAlignment, setContentsMargins, setContentsMargins, setEnabled, setGeometry, setMargin, setMenuBar, setSizeConstraint, setWidgetSpacing, sizeConstraint, sizeHint, spacerItem, takeAt, update, widget, widgetSpacing |
Methods inherited from class com.trolltech.qt.core.QObject |
---|
childEvent, children, connectSlotsByName, customEvent, disposeLater, dumpObjectInfo, dumpObjectTree, dynamicPropertyNames, event, eventFilter, findChild, findChild, findChild, findChildren, findChildren, findChildren, findChildren, indexOfProperty, installEventFilter, isWidgetType, killTimer, moveToThread, objectName, parent, properties, property, removeEventFilter, setObjectName, setParent, setProperty, startTimer, timerEvent, toString, userProperty |
Methods inherited from class com.trolltech.qt.QtJambiObject |
---|
dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr |
Methods inherited from class com.trolltech.qt.QSignalEmitter |
---|
blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread |
Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
---|
__qt_signalInitialization |
Methods inherited from class java.lang.Object |
---|
clone, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface com.trolltech.qt.QtJambiInterface |
---|
disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership |
Field Detail |
---|
public final QSignalEmitter.Signal1 currentChanged
This signal takes 1 generic argument(s). We list their type and the name they go by in the description of this signal. <java.lang.Integer(named: index)>:
This signal is emitted whenever the current widget in the layout changes. The index specifies 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 QStackedLayout
)
currentWidget()
, and setCurrentWidget()
.
public final QSignalEmitter.Signal1 widgetRemoved
This signal takes 1 generic argument(s). We list their type and the name they go by in the description of this signal. <java.lang.Integer(named: index)>:
This signal is emitted whenever a widget is removed from the layout. The widget's index is passed as parameter.
removeWidget()
.
Constructor Detail |
---|
public QStackedLayout()
QStackedLayout
with no parent. This QStackedLayout
must be installed on a widget later on to become effective.
insertWidget()
.
public QStackedLayout(QLayout parentLayout)
QStackedLayout
and inserts it into the given parentLayout.
public QStackedLayout(QWidget parent)
QStackedLayout
with the given parent. This layout will install itself on the parent widget and manage the geometry of its children.
Method Detail |
---|
public final int addStackedWidget(QWidget w)
If the QStackedLayout
is empty before this function is called, the given widget becomes the current widget.
insertWidget()
, removeWidget()
, and setCurrentWidget()
.
public final int currentIndex()
currentWidget()
, and indexOf()
.
public final QWidget currentWidget()
currentIndex()
, and setCurrentWidget()
.
public final int insertWidget(int index, QWidget w)
QStackedLayout
. 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 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.
removeWidget()
, and setCurrentWidget()
.
public final void setCurrentIndex(int index)
currentWidget()
, and indexOf()
.
public final void setCurrentWidget(QWidget w)
setCurrentIndex()
, and currentWidget()
.
public final void setStackingMode(QStackedLayout.StackingMode stackingMode)
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.
public final QStackedLayout.StackingMode stackingMode()
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.
public final QWidget widget(int arg__1)
currentWidget()
, and indexOf()
.
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