Module qtjambi

Package io.qt.widgets

Class QFormLayout

java.lang.Object

io.qt.internal.QtJambiObject

io.qt.QtObject

io.qt.core.QObject

io.qt.widgets.QLayout

io.qt.widgets.QFormLayout

All Implemented Interfaces:

QtObjectInterface, QtSignalBlockerInterface, QtSignalEmitterInterface, QtThreadAffineInterface, QLayoutItem

public class QFormLayout
extends QLayout

Manages forms of input widgets and their associated labels

Java wrapper for Qt class QFormLayout

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	QFormLayout.FieldGrowthPolicy	Java wrapper for Qt enum QFormLayout::FieldGrowthPolicy
static class	QFormLayout.ItemInfo
static class	QFormLayout.ItemRole	Java wrapper for Qt enum QFormLayout::ItemRole
static class	QFormLayout.RowWrapPolicy	Java wrapper for Qt enum QFormLayout::RowWrapPolicy
static class	QFormLayout.TakeRowResult	Contains the result of a QFormLayout::takeRow() call

Nested classes/interfaces inherited from class io.qt.widgets.QLayout

QLayout.SizeConstraint

Nested classes/interfaces inherited from class io.qt.core.QObject

QObject.MultiSignal, QObject.PrivateSignal0, QObject.PrivateSignal1<A>, QObject.PrivateSignal2<A,B>, QObject.PrivateSignal3<A,B,C>, QObject.PrivateSignal4<A,B,C,D>, QObject.PrivateSignal5<A,B,C,D,E>, QObject.PrivateSignal6<A,B,C,D,E,F>, QObject.PrivateSignal7<A,B,C,D,E,F,G>, QObject.PrivateSignal8<A,B,C,D,E,F,G,H>, QObject.PrivateSignal9<A,B,C,D,E,F,G,H,I>, QObject.QBooleanProperty, QObject.QByteProperty, QObject.QCharProperty, QObject.QComputedBooleanProperty, QObject.QComputedByteProperty, QObject.QComputedCharProperty, QObject.QComputedDoubleProperty, QObject.QComputedFloatProperty, QObject.QComputedIntProperty, QObject.QComputedLongProperty, QObject.QComputedProperty<T>, QObject.QComputedShortProperty, QObject.QDeclarativeConstructor, QObject.QDoubleProperty, QObject.QFloatProperty, QObject.QIntProperty, QObject.QLongProperty, QObject.QProperty<T>, QObject.QShortProperty, QObject.Signal0, QObject.Signal1<A>, QObject.Signal1Default1<A>, QObject.Signal2<A,B>, QObject.Signal2Default1<A,B>, QObject.Signal2Default2<A,B>, QObject.Signal3<A,B,C>, QObject.Signal3Default1<A,B,C>, QObject.Signal3Default2<A,B,C>, QObject.Signal3Default3<A,B,C>, QObject.Signal4<A,B,C,D>, QObject.Signal4Default1<A,B,C,D>, QObject.Signal4Default2<A,B,C,D>, QObject.Signal4Default3<A,B,C,D>, QObject.Signal4Default4<A,B,C,D>, QObject.Signal5<A,B,C,D,E>, QObject.Signal5Default1<A,B,C,D,E>, QObject.Signal5Default2<A,B,C,D,E>, QObject.Signal5Default3<A,B,C,D,E>, QObject.Signal5Default4<A,B,C,D,E>, QObject.Signal5Default5<A,B,C,D,E>, QObject.Signal6<A,B,C,D,E,F>, QObject.Signal6Default1<A,B,C,D,E,F>, QObject.Signal6Default2<A,B,C,D,E,F>, QObject.Signal6Default3<A,B,C,D,E,F>, QObject.Signal6Default4<A,B,C,D,E,F>, QObject.Signal6Default5<A,B,C,D,E,F>, QObject.Signal6Default6<A,B,C,D,E,F>, QObject.Signal7<A,B,C,D,E,F,G>, QObject.Signal7Default1<A,B,C,D,E,F,G>, QObject.Signal7Default2<A,B,C,D,E,F,G>, QObject.Signal7Default3<A,B,C,D,E,F,G>, QObject.Signal7Default4<A,B,C,D,E,F,G>, QObject.Signal7Default5<A,B,C,D,E,F,G>, QObject.Signal7Default6<A,B,C,D,E,F,G>, QObject.Signal7Default7<A,B,C,D,E,F,G>, QObject.Signal8<A,B,C,D,E,F,G,H>, QObject.Signal8Default1<A,B,C,D,E,F,G,H>, QObject.Signal8Default2<A,B,C,D,E,F,G,H>, QObject.Signal8Default3<A,B,C,D,E,F,G,H>, QObject.Signal8Default4<A,B,C,D,E,F,G,H>, QObject.Signal8Default5<A,B,C,D,E,F,G,H>, QObject.Signal8Default6<A,B,C,D,E,F,G,H>, QObject.Signal8Default7<A,B,C,D,E,F,G,H>, QObject.Signal8Default8<A,B,C,D,E,F,G,H>, QObject.Signal9<A,B,C,D,E,F,G,H,I>, QObject.Signal9Default1<A,B,C,D,E,F,G,H,I>, QObject.Signal9Default2<A,B,C,D,E,F,G,H,I>, QObject.Signal9Default3<A,B,C,D,E,F,G,H,I>, QObject.Signal9Default4<A,B,C,D,E,F,G,H,I>, QObject.Signal9Default5<A,B,C,D,E,F,G,H,I>, QObject.Signal9Default6<A,B,C,D,E,F,G,H,I>, QObject.Signal9Default7<A,B,C,D,E,F,G,H,I>, QObject.Signal9Default8<A,B,C,D,E,F,G,H,I>, QObject.Signal9Default9<A,B,C,D,E,F,G,H,I>, QObject.SignalConfiguration

Nested classes/interfaces inherited from class io.qt.QtObject

QtObject.QPrivateConstructor

Nested classes/interfaces inherited from interface io.qt.widgets.QLayoutItem

QLayoutItem.Impl, QLayoutItem.MemberAccess

Field Summary

Fields

Modifier and Type	Field	Description
static QMetaObject	staticMetaObject	This variable stores the meta-object for the class.

Fields inherited from class io.qt.core.QObject

destroyed, objectNameChanged

Constructor Summary

Constructors

Modifier	Constructor	Description
	QFormLayout()	Overloaded constructor for QFormLayout(io.qt.widgets.QWidget) with parent = null.
protected	QFormLayout(QObject.QDeclarativeConstructor constructor)	Constructor for internal use only.
protected	QFormLayout(QtObject.QPrivateConstructor p)	Constructor for internal use only.
	QFormLayout(QWidget parent)	See QFormLayout::QFormLayout(QWidget*)

Method Summary

Modifier and Type	Method	Description
void	addItem(QLayoutItem item)	See QLayout::addItem(QLayoutItem*)
void	addRow(QLayout layout)	See QFormLayout::addRow(QLayout*)
void	addRow(QWidget widget)	See QFormLayout::addRow(QWidget*)
void	addRow(QWidget label, QLayout field)	See QFormLayout::addRow(QWidget*,QLayout*)
void	addRow(QWidget label, QWidget field)	See QFormLayout::addRow(QWidget*,QWidget*)
void	addRow(String labelText, QLayout field)	See QFormLayout::addRow(QString,QLayout*)
void	addRow(String labelText, QWidget field)	See QFormLayout::addRow(QString,QWidget*)
int	count()	See QLayout::count()const
Qt.Orientations	expandingDirections()	See QLayoutItem::expandingDirections()const
QFormLayout.FieldGrowthPolicy	fieldGrowthPolicy()	See QFormLayout::fieldGrowthPolicy()const
Qt.Alignment	formAlignment()	See QFormLayout::formAlignment()const
QFormLayout.ItemInfo	getItemPosition(int index)	See QFormLayout::getItemPosition(int,int*,QFormLayout::ItemRole*)const
QFormLayout.ItemInfo	getLayoutPosition(QLayout layout)	See QFormLayout::getLayoutPosition(QLayout*,int*,QFormLayout::ItemRole*)const
QFormLayout.ItemInfo	getWidgetPosition(QWidget widget)	See QFormLayout::getWidgetPosition(QWidget*,int*,QFormLayout::ItemRole*)const
boolean	hasHeightForWidth()	See QLayoutItem::hasHeightForWidth()const
int	heightForWidth(int width)	See QLayoutItem::heightForWidth(int)const
int	horizontalSpacing()	See QFormLayout::horizontalSpacing()const
void	insertRow(int row, QLayout layout)	See QFormLayout::insertRow(int,QLayout*)
void	insertRow(int row, QWidget widget)	See QFormLayout::insertRow(int,QWidget*)
void	insertRow(int row, QWidget label, QLayout field)	See QFormLayout::insertRow(int,QWidget*,QLayout*)
void	insertRow(int row, QWidget label, QWidget field)	See QFormLayout::insertRow(int,QWidget*,QWidget*)
void	insertRow(int row, String labelText, QLayout field)	See QFormLayout::insertRow(int,QString,QLayout*)
void	insertRow(int row, String labelText, QWidget field)	See QFormLayout::insertRow(int,QString,QWidget*)
void	invalidate()	See QLayoutItem::invalidate()
QLayoutItem	itemAt(int index)	See QLayout::itemAt(int)const
QLayoutItem	itemAt(int row, QFormLayout.ItemRole role)	See QFormLayout::itemAt(int,QFormLayout::ItemRole)const
Qt.Alignment	labelAlignment()	See QFormLayout::labelAlignment()const
QWidget	labelForField(QLayout field)	See QFormLayout::labelForField(QLayout*)const
QWidget	labelForField(QWidget field)	See QFormLayout::labelForField(QWidget*)const
QSize	minimumSize()	See QLayoutItem::minimumSize()const
void	removeRow(int row)	See QFormLayout::removeRow(int)
void	removeRow(QLayout layout)	See QFormLayout::removeRow(QLayout*)
void	removeRow(QWidget widget)	See QFormLayout::removeRow(QWidget*)
int	rowCount()	See QFormLayout::rowCount()const
QFormLayout.RowWrapPolicy	rowWrapPolicy()	See QFormLayout::rowWrapPolicy()const
void	setFieldGrowthPolicy(QFormLayout.FieldGrowthPolicy policy)	See QFormLayout::setFieldGrowthPolicy(QFormLayout::FieldGrowthPolicy)
void	setFormAlignment(Qt.Alignment alignment)	See QFormLayout::setFormAlignment(Qt::Alignment)
void	setFormAlignment(Qt.AlignmentFlag... alignment)	Overloaded function for setFormAlignment(io.qt.core.Qt.Alignment).
void	setGeometry(QRect rect)	See QLayoutItem::setGeometry(QRect)
void	setHorizontalSpacing(int spacing)	See QFormLayout::setHorizontalSpacing(int)
void	setItem(int row, QFormLayout.ItemRole role, QLayoutItem item)	See QFormLayout::setItem(int,QFormLayout::ItemRole,QLayoutItem*)
void	setLabelAlignment(Qt.Alignment alignment)	See QFormLayout::setLabelAlignment(Qt::Alignment)
void	setLabelAlignment(Qt.AlignmentFlag... alignment)	Overloaded function for setLabelAlignment(io.qt.core.Qt.Alignment).
void	setLayout(int row, QFormLayout.ItemRole role, QLayout layout)	See QFormLayout::setLayout(int,QFormLayout::ItemRole,QLayout*)
void	setRowWrapPolicy(QFormLayout.RowWrapPolicy policy)	See QFormLayout::setRowWrapPolicy(QFormLayout::RowWrapPolicy)
void	setSpacing(int arg__1)	See QFormLayout::setSpacing(int)
void	setVerticalSpacing(int spacing)	See QFormLayout::setVerticalSpacing(int)
void	setWidget(int row, QFormLayout.ItemRole role, QWidget widget)	See QFormLayout::setWidget(int,QFormLayout::ItemRole,QWidget*)
QSize	sizeHint()	See QLayoutItem::sizeHint()const
int	spacing()	See QFormLayout::spacing()const
QLayoutItem	takeAt(int index)	See QLayout::takeAt(int)
QFormLayout.TakeRowResult	takeRow(int row)	See QFormLayout::takeRow(int)
QFormLayout.TakeRowResult	takeRow(QLayout layout)	See QFormLayout::takeRow(QLayout*)
QFormLayout.TakeRowResult	takeRow(QWidget widget)	See QFormLayout::takeRow(QWidget*)
int	verticalSpacing()	See QFormLayout::verticalSpacing()const

Methods inherited from class io.qt.widgets.QLayout

activate, addChildLayout, addChildWidget, addWidget, adoptLayout, alignment, alignmentRect, childEvent, closestAcceptableSize, contentsMargins, contentsRect, controlTypes, geometry, getContentsMargins, indexOf, indexOf, isEmpty, isEnabled, layout, maximumSize, menuBar, minimumHeightForWidth, parentWidget, removeItem, removeWidget, replaceWidget, replaceWidget, replaceWidget, setAlignment, setAlignment, setAlignment, setAlignment, setAlignment, setAlignment, setContentsMargins, setContentsMargins, setEnabled, setMenuBar, setSizeConstraint, setWidgetSpacing, sizeConstraint, spacerItem, totalHeightForWidth, totalMaximumSize, totalMinimumSize, totalSizeHint, update, widget, widgetEvent, widgetSpacing

Methods inherited from class io.qt.core.QObject

blockSignals, children, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connect, connectNotify, customEvent, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnect, disconnectNotify, disposeLater, dumpObjectInfo, dumpObjectTree, dynamicPropertyNames, emit, emit, emit, emit, emit, emit, emit, emit, emit, emit, event, eventFilter, findChild, findChild, findChild, findChild, findChild, findChildren, findChildren, findChildren, findChildren, findChildren, findChildren, findChildren, findChildren, inherits, inherits, installEventFilter, isSignalConnected, isWidgetType, isWindowType, killTimer, metaObject, moveToThread, objectName, parent, property, qt_metacast, receivers, receivers, removeEventFilter, sender, senderSignalIndex, setObjectName, setParent, setProperty, signalsBlocked, startTimer, startTimer, thread, timerEvent, toString, tr, tr, tr

Methods inherited from class io.qt.QtObject

dispose, equals, isDisposed

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface io.qt.QtObjectInterface

dispose, isDisposed

Field Details

staticMetaObject

public static final QMetaObject staticMetaObject

This variable stores the meta-object for the class.

Constructor Details

QFormLayout

public QFormLayout()

Overloaded constructor for QFormLayout(io.qt.widgets.QWidget) with parent = null.

QFormLayout

public QFormLayout(QWidget parent)

See QFormLayout::QFormLayout(QWidget*)

QFormLayout

protected QFormLayout(QtObject.QPrivateConstructor p)

Constructor for internal use only.

Parameters:

p - expected to be null.

QFormLayout

protected QFormLayout(QObject.QDeclarativeConstructor constructor)

Constructor for internal use only. It is not allowed to call the declarative constructor from inside Java.

Method Details

addRow

@QtUninvokable public final void addRow(QLayout layout)

See QFormLayout::addRow(QLayout*)

addRow

@QtUninvokable public final void addRow(QWidget label, QLayout field)

See QFormLayout::addRow(QWidget*,QLayout*)

addRow

@QtUninvokable public final void addRow(QWidget label, QWidget field)

See QFormLayout::addRow(QWidget*,QWidget*)

addRow

@QtUninvokable public final void addRow(QWidget widget)

See QFormLayout::addRow(QWidget*)

addRow

@QtUninvokable public final void addRow(String labelText, QLayout field)

See QFormLayout::addRow(QString,QLayout*)

addRow

@QtUninvokable public final void addRow(String labelText, QWidget field)

See QFormLayout::addRow(QString,QWidget*)

fieldGrowthPolicy

@QtUninvokable public final QFormLayout.FieldGrowthPolicy fieldGrowthPolicy()

See QFormLayout::fieldGrowthPolicy()const

formAlignment

@QtUninvokable public final Qt.Alignment formAlignment()

See QFormLayout::formAlignment()const

getItemPosition

@QtUninvokable public final QFormLayout.ItemInfo getItemPosition(int index)

See QFormLayout::getItemPosition(int,int*,QFormLayout::ItemRole*)const

getLayoutPosition

@QtUninvokable public final QFormLayout.ItemInfo getLayoutPosition(QLayout layout)

See QFormLayout::getLayoutPosition(QLayout*,int*,QFormLayout::ItemRole*)const

getWidgetPosition

@QtUninvokable public final QFormLayout.ItemInfo getWidgetPosition(QWidget widget)

See QFormLayout::getWidgetPosition(QWidget*,int*,QFormLayout::ItemRole*)const

horizontalSpacing

@QtUninvokable public final int horizontalSpacing()

See QFormLayout::horizontalSpacing()const

insertRow

@QtUninvokable public final void insertRow(int row, QLayout layout)

See QFormLayout::insertRow(int,QLayout*)

insertRow

@QtUninvokable public final void insertRow(int row, QWidget label, QLayout field)

See QFormLayout::insertRow(int,QWidget*,QLayout*)

insertRow

@QtUninvokable public final void insertRow(int row, QWidget label, QWidget field)

See QFormLayout::insertRow(int,QWidget*,QWidget*)

insertRow

@QtUninvokable public final void insertRow(int row, QWidget widget)

See QFormLayout::insertRow(int,QWidget*)

insertRow

@QtUninvokable public final void insertRow(int row, String labelText, QLayout field)

See QFormLayout::insertRow(int,QString,QLayout*)

insertRow

@QtUninvokable public final void insertRow(int row, String labelText, QWidget field)

See QFormLayout::insertRow(int,QString,QWidget*)

itemAt

@QtUninvokable public final QLayoutItem itemAt(int row, QFormLayout.ItemRole role)

See QFormLayout::itemAt(int,QFormLayout::ItemRole)const

labelAlignment

@QtUninvokable public final Qt.Alignment labelAlignment()

See QFormLayout::labelAlignment()const

labelForField

@QtUninvokable public final QWidget labelForField(QLayout field)

See QFormLayout::labelForField(QLayout*)const

labelForField

@QtUninvokable public final QWidget labelForField(QWidget field)

See QFormLayout::labelForField(QWidget*)const

removeRow

@QtUninvokable public final void removeRow(QLayout layout)

See QFormLayout::removeRow(QLayout*)

removeRow

@QtUninvokable public final void removeRow(QWidget widget)

See QFormLayout::removeRow(QWidget*)

removeRow

@QtUninvokable public final void removeRow(int row)

See QFormLayout::removeRow(int)

rowCount

@QtUninvokable public final int rowCount()

See QFormLayout::rowCount()const

rowWrapPolicy

@QtUninvokable public final QFormLayout.RowWrapPolicy rowWrapPolicy()

See QFormLayout::rowWrapPolicy()const

setFieldGrowthPolicy

@QtUninvokable public final void setFieldGrowthPolicy(QFormLayout.FieldGrowthPolicy policy)

See QFormLayout::setFieldGrowthPolicy(QFormLayout::FieldGrowthPolicy)

setFormAlignment

@QtUninvokable public final void setFormAlignment(Qt.AlignmentFlag... alignment)

Overloaded function for setFormAlignment(io.qt.core.Qt.Alignment).

setFormAlignment

@QtUninvokable public final void setFormAlignment(Qt.Alignment alignment)

See QFormLayout::setFormAlignment(Qt::Alignment)

setHorizontalSpacing

@QtUninvokable public final void setHorizontalSpacing(int spacing)

See QFormLayout::setHorizontalSpacing(int)

setItem

@QtUninvokable public final void setItem(int row, QFormLayout.ItemRole role, QLayoutItem item)

See QFormLayout::setItem(int,QFormLayout::ItemRole,QLayoutItem*)

setLabelAlignment

@QtUninvokable public final void setLabelAlignment(Qt.AlignmentFlag... alignment)

Overloaded function for setLabelAlignment(io.qt.core.Qt.Alignment).

setLabelAlignment

@QtUninvokable public final void setLabelAlignment(Qt.Alignment alignment)

See QFormLayout::setLabelAlignment(Qt::Alignment)

setLayout

@QtUninvokable public final void setLayout(int row, QFormLayout.ItemRole role, QLayout layout)

See QFormLayout::setLayout(int,QFormLayout::ItemRole,QLayout*)

setRowWrapPolicy

@QtUninvokable public final void setRowWrapPolicy(QFormLayout.RowWrapPolicy policy)

See QFormLayout::setRowWrapPolicy(QFormLayout::RowWrapPolicy)

setSpacing

@QtUninvokable public final void setSpacing(int arg__1)

See QFormLayout::setSpacing(int)

setVerticalSpacing

@QtUninvokable public final void setVerticalSpacing(int spacing)

See QFormLayout::setVerticalSpacing(int)

setWidget

@QtUninvokable public final void setWidget(int row, QFormLayout.ItemRole role, QWidget widget)

See QFormLayout::setWidget(int,QFormLayout::ItemRole,QWidget*)

spacing

@QtUninvokable public final int spacing()

See QFormLayout::spacing()const

takeRow

@QtUninvokable public final QFormLayout.TakeRowResult takeRow(QLayout layout)

See QFormLayout::takeRow(QLayout*)

takeRow

@QtUninvokable public final QFormLayout.TakeRowResult takeRow(QWidget widget)

See QFormLayout::takeRow(QWidget*)

takeRow

@QtUninvokable public final QFormLayout.TakeRowResult takeRow(int row)

See QFormLayout::takeRow(int)

verticalSpacing

@QtUninvokable public final int verticalSpacing()

See QFormLayout::verticalSpacing()const

addItem

@QtUninvokable public void addItem(QLayoutItem item)

See QLayout::addItem(QLayoutItem*)

Specified by:

addItem in class QLayout

count

@QtUninvokable public int count()

See QLayout::count()const

Specified by:

count in class QLayout

expandingDirections

@QtUninvokable public Qt.Orientations expandingDirections()

See QLayoutItem::expandingDirections()const

Specified by:

expandingDirections in interface QLayoutItem

Overrides:

expandingDirections in class QLayout

hasHeightForWidth

@QtUninvokable public boolean hasHeightForWidth()

See QLayoutItem::hasHeightForWidth()const

Specified by:

hasHeightForWidth in interface QLayoutItem

Overrides:

hasHeightForWidth in class QLayout

heightForWidth

@QtUninvokable public int heightForWidth(int width)

See QLayoutItem::heightForWidth(int)const

Specified by:

heightForWidth in interface QLayoutItem

Overrides:

heightForWidth in class QLayout

invalidate

@QtUninvokable public void invalidate()

See QLayoutItem::invalidate()

Specified by:

invalidate in interface QLayoutItem

Overrides:

invalidate in class QLayout

itemAt

@QtUninvokable public QLayoutItem itemAt(int index)

See QLayout::itemAt(int)const

Specified by:

itemAt in class QLayout

minimumSize

@QtUninvokable public QSize minimumSize()

See QLayoutItem::minimumSize()const

Specified by:

minimumSize in interface QLayoutItem

Overrides:

minimumSize in class QLayout

setGeometry

@QtUninvokable public void setGeometry(QRect rect)

See QLayoutItem::setGeometry(QRect)

Specified by:

setGeometry in interface QLayoutItem

Overrides:

setGeometry in class QLayout

sizeHint

@QtUninvokable public QSize sizeHint()

See QLayoutItem::sizeHint()const

Specified by:

sizeHint in interface QLayoutItem

Specified by:

sizeHint in class QLayout

takeAt

@QtUninvokable public QLayoutItem takeAt(int index)

See QLayout::takeAt(int)

Specified by:

takeAt in class QLayout