Qt 6.x
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QQuickFlowPrivate Class Reference

\qmltype Flow \instantiates QQuickFlow \inqmlmodule QtQuick \inherits Item More...

+ Inheritance diagram for QQuickFlowPrivate:
+ Collaboration diagram for QQuickFlowPrivate:

Public Member Functions

 QQuickFlowPrivate ()
 
void effectiveLayoutDirectionChange () override
 
- Public Member Functions inherited from QQuickBasePositionerPrivate
 QQuickBasePositionerPrivate ()
 
void init (QQuickBasePositioner::PositionerType at)
 
void watchChanges (QQuickItem *other)
 
void unwatchChanges (QQuickItem *other)
 
void setPositioningDirty ()
 
void mirrorChange () override
 
bool isLeftToRight () const
 
void itemSiblingOrderChanged (QQuickItem *other) override
 
void itemGeometryChanged (QQuickItem *, QQuickGeometryChange change, const QRectF &) override
 
void itemVisibilityChanged (QQuickItem *) override
 
void itemDestroyed (QQuickItem *item) override
 
virtual void effectiveLayoutDirectionChange ()
 
qreal padding () const
 
void setTopPadding (qreal value, bool reset=false)
 
void setLeftPadding (qreal value, bool reset=false)
 
void setRightPadding (qreal value, bool reset=false)
 
void setBottomPadding (qreal value, bool reset=false)
 
- Public Member Functions inherited from QQuickImplicitSizeItemPrivate
 QQuickImplicitSizeItemPrivate ()
 
- Public Member Functions inherited from QQuickItemPrivate
 QQuickItemPrivate ()
 
 ~QQuickItemPrivate () override
 
void init (QQuickItem *parent)
 
QQmlListProperty< QObject > data ()
 
QQmlListProperty< QObject > resources ()
 
QQmlListProperty< QQuickItem > children ()
 
QQmlListProperty< QQuickItem > visibleChildren ()
 
QQmlListProperty< QQuickState > states ()
 
QQmlListProperty< QQuickTransition > transitions ()
 
QString state () const
 
void setState (const QString &)
 
QQuickAnchorLine left () const
 
QQuickAnchorLine right () const
 
QQuickAnchorLine horizontalCenter () const
 
QQuickAnchorLine top () const
 
QQuickAnchorLine bottom () const
 
QQuickAnchorLine verticalCenter () const
 
QQuickAnchorLine baseline () const
 
void localizedTouchEvent (const QTouchEvent *event, bool isFiltering, QMutableTouchEvent *localized)
 
bool hasPointerHandlers () const
 
bool hasEnabledHoverHandlers () const
 
virtual void addPointerHandler (QQuickPointerHandler *h)
 
virtual void removePointerHandler (QQuickPointerHandler *h)
 
void _q_resourceObjectDeleted (QObject *)
 
quint64 _q_createJSWrapper (QV4::ExecutionEngine *engine)
 
template<typename Fn , typename ... Args>
void notifyChangeListeners (QQuickItemPrivate::ChangeTypes changeTypes, Fn &&function, Args &&...args)
 
virtual void registerAsContainmentMask (QQuickItem *, bool)
 
QQuickAnchors * anchors () const
 \qmlpropertygroup QtQuick::Item::anchors \qmlproperty AnchorLine QtQuick::Item::anchors.top \qmlproperty AnchorLine QtQuick::Item::anchors.bottom \qmlproperty AnchorLine QtQuick::Item::anchors.left \qmlproperty AnchorLine QtQuick::Item::anchors.right \qmlproperty AnchorLine QtQuick::Item::anchors.horizontalCenter \qmlproperty AnchorLine QtQuick::Item::anchors.verticalCenter \qmlproperty AnchorLine QtQuick::Item::anchors.baseline
 
Qt::MouseButtons acceptedMouseButtons () const
 
void addItemChangeListener (QQuickItemChangeListener *listener, ChangeTypes types)
 
void updateOrAddItemChangeListener (QQuickItemChangeListener *listener, ChangeTypes types)
 
void removeItemChangeListener (QQuickItemChangeListener *, ChangeTypes types)
 
void updateOrAddGeometryChangeListener (QQuickItemChangeListener *listener, QQuickGeometryChange types)
 
void updateOrRemoveGeometryChangeListener (QQuickItemChangeListener *listener, QQuickGeometryChange types)
 
QQuickStateGroup * _states ()
 
QQuickItem::TransformOrigin origin () const
 
QString dirtyToString () const
 
void dirty (DirtyType)
 
void addToDirtyList ()
 
void removeFromDirtyList ()
 
void setCulled (bool)
 
QSGContext * sceneGraphContext () const
 
QSGRenderContext * sceneGraphRenderContext () const
 
QList< QQuickItem * > paintOrderChildItems () const
 
void addChild (QQuickItem *)
 
void removeChild (QQuickItem *)
 
void siblingOrderChanged ()
 
void markSortedChildrenDirty (QQuickItem *child)
 
void refWindow (QQuickWindow *)
 
void derefWindow ()
 
void updateSubFocusItem (QQuickItem *scope, bool focus)
 Clears all sub focus items from scope.
 
QTransform windowToItemTransform () const
 Returns a transform that maps points from window space into item space.
 
QTransform itemToWindowTransform () const
 Returns a transform that maps points from item space into window space.
 
void itemToParentTransform (QTransform *) const
 Modifies t with this item's local transform relative to its parent.
 
QTransform globalToWindowTransform () const
 Returns a transform that maps points from global space into window space.
 
QTransform windowToGlobalTransform () const
 Returns a transform that maps points from window space into global space.
 
void setX (qreal x)
 
void xChanged ()
 
 Q_OBJECT_COMPAT_PROPERTY (QQuickItemPrivate, qreal, x, &QQuickItemPrivate::setX, &QQuickItemPrivate::xChanged)
 
void setY (qreal y)
 
void yChanged ()
 
 Q_OBJECT_COMPAT_PROPERTY (QQuickItemPrivate, qreal, y, &QQuickItemPrivate::setY, &QQuickItemPrivate::yChanged)
 
void setWidth (qreal width)
 
void widthChanged ()
 
 Q_OBJECT_COMPAT_PROPERTY (QQuickItemPrivate, qreal, width, &QQuickItemPrivate::setWidth, &QQuickItemPrivate::widthChanged)
 
void setHeight (qreal height)
 
void heightChanged ()
 
 Q_OBJECT_COMPAT_PROPERTY (QQuickItemPrivate, qreal, height, &QQuickItemPrivate::setHeight, &QQuickItemPrivate::heightChanged)
 
bool widthValid () const
 
bool heightValid () const
 
qreal z () const
 
qreal scale () const
 
qreal rotation () const
 
qreal opacity () const
 
void setAccessible ()
 
virtual qreal getImplicitWidth () const
 
virtual qreal getImplicitHeight () const
 
virtual void implicitWidthChanged ()
 
virtual void implicitHeightChanged ()
 
void setImplicitAntialiasing (bool antialiasing)
 
void resolveLayoutMirror ()
 
void setImplicitLayoutMirror (bool mirror, bool inherit)
 
void setLayoutMirror (bool mirror)
 
bool isMirrored () const
 
void emitChildrenRectChanged (const QRectF &rect)
 
QPointF computeTransformOrigin () const
 
virtual bool transformChanged (QQuickItem *transformedItem)
 
QPointF adjustedPosForTransform (const QPointF &centroid, const QPointF &startPos, const QVector2D &activeTranslatation, qreal startScale, qreal activeScale, qreal startRotation, qreal activeRotation)
 
QQuickDeliveryAgent * deliveryAgent ()
 
QQuickDeliveryAgentPrivate * deliveryAgentPrivate ()
 
QQuickDeliveryAgent * ensureSubsceneDeliveryAgent ()
 
void deliverKeyEvent (QKeyEvent *)
 
bool filterKeyEvent (QKeyEvent *, bool post)
 
void deliverShortcutOverrideEvent (QKeyEvent *)
 
bool anyPointerHandlerWants (const QPointerEvent *event, const QEventPoint &point) const
 
virtual bool handlePointerEvent (QPointerEvent *, bool avoidGrabbers=false)
 
virtual void setVisible (bool visible)
 
bool isTransparentForPositioner () const
 
void setTransparentForPositioner (bool trans)
 
bool calcEffectiveVisible () const
 
bool setEffectiveVisibleRecur (bool)
 
bool calcEffectiveEnable () const
 
void setEffectiveEnableRecur (QQuickItem *scope, bool)
 
QSGTransformNode * itemNode ()
 
QSGNode * childContainerNode ()
 
QSGOpacityNode * opacityNode () const
 
QQuickDefaultClipNode * clipNode () const
 
QSGRootNode * rootNode () const
 
virtual QSGTransformNode * createTransformNode ()
 
void refFromEffectItem (bool hide)
 
void recursiveRefFromEffectItem (int refs)
 
void derefFromEffectItem (bool unhide)
 
void itemChange (QQuickItem::ItemChange, const QQuickItem::ItemChangeData &)
 
virtual void mirrorChange ()
 
void setHasCursorInChild (bool hasCursor)
 
void setHasHoverInChild (bool hasHover)
 
virtual void updatePolish ()
 
virtual void dumpItemTree (int indent) const
 
- Public Member Functions inherited from QObjectPrivate
void ensureExtraData ()
 
 QObjectPrivate (int version=QObjectPrivateVersion)
 
virtual ~QObjectPrivate ()
 
void deleteChildren ()
 
void clearBindingStorage ()
 
void checkForIncompatibleLibraryVersion (int version) const
 
void setParent_helper (QObject *)
 
void moveToThread_helper ()
 
void setThreadData_helper (QThreadData *currentData, QThreadData *targetData, QBindingStatus *status)
 
void _q_reregisterTimers (void *pointer)
 
bool isSender (const QObject *receiver, const char *signal) const
 
QObjectList receiverList (const char *signal) const
 
QObjectList senderList () const
 
void ensureConnectionData ()
 
void addConnection (int signal, Connection *c)
 
int signalIndex (const char *signalName, const QMetaObject **meta=nullptr) const
 
bool isSignalConnected (uint signalIdx, bool checkDeclarative=true) const
 
bool maybeSignalConnected (uint signalIndex) const
 
bool isDeclarativeSignalConnected (uint signalIdx) const
 
void connectNotify (const QMetaMethod &signal)
 
void disconnectNotify (const QMetaMethod &signal)
 
void reinitBindingStorageAfterThreadMove ()
 
virtual std::string flagsForDumping () const
 
QtPrivate::QPropertyAdaptorSlotObject * getPropertyAdaptorSlotObject (const QMetaProperty &property)
 
- Public Member Functions inherited from QObjectData
 QObjectData ()=default
 
virtual ~QObjectData ()=0
 
QMetaObject * dynamicMetaObject () const
 
- Public Member Functions inherited from QQuickPaletteProviderPrivateBase< QQuickItem, QQuickItemPrivate >
virtual ~QQuickPaletteProviderPrivateBase ()=default
 
virtual QQuickPalette * palette () const
 
virtual void setPalette (QQuickPalette *p)
 
virtual void resetPalette ()
 
virtual bool providesPalette () const
 
QPalette defaultPalette () const override
 
QPalette parentPalette (const QPalette &fallbackPalette) const override
 
void inheritPalette (const QPalette &parentPalette)
 
virtual void updateChildrenPalettes (const QPalette &parentPalette)
 
- Public Member Functions inherited from QQuickAbstractPaletteProvider
virtual ~QQuickAbstractPaletteProvider ()=default
 
virtual QPalette defaultPalette () const =0
 
virtual QPalette parentPalette (const QPalette &fallbackPalette) const
 
- Public Member Functions inherited from QQuickItemChangeListener
virtual ~QQuickItemChangeListener ()
 
virtual void itemGeometryChanged (QQuickItem *, QQuickGeometryChange, const QRectF &)
 
virtual void itemSiblingOrderChanged (QQuickItem *)
 
virtual void itemVisibilityChanged (QQuickItem *)
 
virtual void itemEnabledChanged (QQuickItem *)
 
virtual void itemOpacityChanged (QQuickItem *)
 
virtual void itemDestroyed (QQuickItem *)
 
virtual void itemChildAdded (QQuickItem *, QQuickItem *)
 
virtual void itemChildRemoved (QQuickItem *, QQuickItem *)
 
virtual void itemParentChanged (QQuickItem *, QQuickItem *)
 
virtual void itemRotationChanged (QQuickItem *)
 
virtual void itemImplicitWidthChanged (QQuickItem *)
 
virtual void itemImplicitHeightChanged (QQuickItem *)
 
virtual void itemFocusChanged (QQuickItem *, Qt::FocusReason)
 
virtual QQuickAnchorsPrivate * anchorPrivate ()
 

Public Attributes

QQuickFlow::Flow flow
 
- Public Attributes inherited from QQuickBasePositionerPrivate
QLazilyAllocated< ExtraData > extra
 
qreal spacing
 
QQuickBasePositioner::PositionerType type
 
bool positioningDirty: 1
 
bool doingPositioning: 1
 
bool anchorConflict: 1
 
Qt::LayoutDirection layoutDirection
 
- Public Attributes inherited from QQuickItemPrivate
QLazilyAllocated< ExtraData, ExtraDataTags > extra
 
QQuickAnchors * _anchors
 
QVector< QQuickItemPrivate::ChangeListener > changeListeners
 
QQuickStateGroup * _stateGroup
 
quint32 flags:7
 
quint32 widthValidFlag:1
 
quint32 heightValidFlag:1
 
quint32 componentComplete:1
 
quint32 keepMouse:1
 
quint32 keepTouch:1
 
quint32 hoverEnabled:1
 
quint32 smooth:1
 
quint32 antialiasing:1
 
quint32 focus:1
 
quint32 activeFocus:1
 
quint32 notifiedFocus:1
 
quint32 notifiedActiveFocus:1
 
quint32 filtersChildMouseEvents:1
 
quint32 explicitVisible:1
 
quint32 effectiveVisible:1
 
quint32 explicitEnable:1
 
quint32 effectiveEnable:1
 
quint32 polishScheduled:1
 
quint32 inheritedLayoutMirror:1
 
quint32 effectiveLayoutMirror:1
 
quint32 isMirrorImplicit:1
 
quint32 inheritMirrorFromParent:1
 
quint32 inheritMirrorFromItem:1
 
quint32 isAccessible:1
 
quint32 culled:1
 
quint32 hasCursor:1
 
quint32 subtreeCursorEnabled:1
 
quint32 subtreeHoverEnabled:1
 
quint32 activeFocusOnTab:1
 
quint32 implicitAntialiasing:1
 
quint32 antialiasingValid:1
 
quint32 isTabFence:1
 
quint32 replayingPressEvent:1
 
quint32 touchEnabled:1
 
quint32 hasCursorHandler:1
 
quint32 maybeHasSubsceneDeliveryAgent:1
 
quint32 subtreeTransformChangedEnabled:1
 
quint32 inDestructor:1
 
quint32 dirtyAttributes
 
QQuickItem * nextDirtyItem
 
QQuickItem ** prevDirtyItem
 
QQuickWindow * window
 
int windowRefCount
 
QQuickItem * parentItem
 
QList< QQuickItem * > childItems
 
QList< QQuickItem * > * sortedChildItems
 
QPointer< QQuickItem > subFocusItem
 
qreal implicitWidth
 
qreal implicitHeight
 
qreal baselineOffset
 
QList< QQuickTransform * > transforms
 
QSGTransformNode * itemNodeInstance
 
QSGNode * paintNode
 
- Public Attributes inherited from QObjectPrivate
ExtraData * extraData
 
QAtomicPointer< QThreadData > threadData
 
QAtomicPointer< ConnectionData > connections
 
union { 
 
   QObject *   currentChildBeingDeleted 
 
   QAbstractDeclarativeData *   declarativeData 
 
};  
 
QAtomicPointer< QtSharedPointer::ExternalRefCountData > sharedRefcount
 
- Public Attributes inherited from QObjectData
QObject * q_ptr
 
QObject * parent
 
QObjectList children
 
uint isWidget: 1
 
uint blockSig: 1
 
uint wasDeleted: 1
 
uint isDeletingChildren: 1
 
uint sendChildEvents: 1
 
uint receiveChildEvents: 1
 
uint isWindow: 1
 
uint deleteLaterCalled: 1
 
uint isQuickItem: 1
 
uint willBeWidget: 1
 
uint wasWidget: 1
 
uint unused: 21
 
QAtomicInt postedEvents
 
QDynamicMetaObjectData * metaObject
 
QBindingStorage bindingStorage
 

Additional Inherited Members

- Public Types inherited from QQuickItemPrivate
enum  ChangeType {
  Geometry = 0x01 , SiblingOrder = 0x02 , Visibility = 0x04 , Opacity = 0x08 ,
  Destroyed = 0x10 , Parent = 0x20 , Children = 0x40 , Rotation = 0x80 ,
  ImplicitWidth = 0x100 , ImplicitHeight = 0x200 , Enabled = 0x400 , Focus = 0x800 ,
  AllChanges = 0xFFFFFFFF
}
 
enum  ExtraDataTag { NoTag = 0x1 , LeftMouseButtonAccepted = 0x2 }
 
enum  DirtyType {
  TransformOrigin = 0x00000001 , Transform = 0x00000002 , BasicTransform = 0x00000004 , Position = 0x00000008 ,
  Size = 0x00000010 , ZValue = 0x00000020 , Content = 0x00000040 , Smooth = 0x00000080 ,
  OpacityValue = 0x00000100 , ChildrenChanged = 0x00000200 , ChildrenStackingChanged = 0x00000400 , ParentChanged = 0x00000800 ,
  Clip = 0x00001000 , Window = 0x00002000 , EffectReference = 0x00008000 , Visible = 0x00010000 ,
  HideReference = 0x00020000 , Antialiasing = 0x00040000 , TransformUpdateMask , ComplexTransformUpdateMask = Transform | Window ,
  ContentUpdateMask = Size | Content | Smooth | Window | Antialiasing , ChildrenUpdateMask = ChildrenChanged | ChildrenStackingChanged | EffectReference | Window
}
 
- Public Types inherited from QObjectPrivate
typedef void(* StaticMetaCallFunction) (QObject *, QMetaObject::Call, int, void **)
 
using ConnectionDataPointer = QExplicitlySharedDataPointer< ConnectionData >
 
- Static Public Member Functions inherited from QQuickBasePositionerPrivate
static Qt::LayoutDirection getLayoutDirection (const QQuickBasePositioner *positioner)
 
static Qt::LayoutDirection getEffectiveLayoutDirection (const QQuickBasePositioner *positioner)
 
- Static Public Member Functions inherited from QQuickItemPrivate
static QQuickItemPrivate * get (QQuickItem *item)
 
static const QQuickItemPrivate * get (const QQuickItem *item)
 
static void data_append (QQmlListProperty< QObject > *, QObject *)
 
static qsizetype data_count (QQmlListProperty< QObject > *)
 \qmlproperty list<QtObject> QtQuick::Item::data \qmldefault
 
static QObject * data_at (QQmlListProperty< QObject > *, qsizetype)
 
static void data_clear (QQmlListProperty< QObject > *)
 
static void data_removeLast (QQmlListProperty< QObject > *)
 
static QObject * resources_at (QQmlListProperty< QObject > *, qsizetype)
 
static void resources_append (QQmlListProperty< QObject > *, QObject *)
 
static qsizetype resources_count (QQmlListProperty< QObject > *)
 
static void resources_clear (QQmlListProperty< QObject > *)
 
static void resources_removeLast (QQmlListProperty< QObject > *)
 
static void children_append (QQmlListProperty< QQuickItem > *, QQuickItem *)
 
static qsizetype children_count (QQmlListProperty< QQuickItem > *)
 
static QQuickItem * children_at (QQmlListProperty< QQuickItem > *, qsizetype)
 
static void children_clear (QQmlListProperty< QQuickItem > *)
 
static void children_removeLast (QQmlListProperty< QQuickItem > *)
 
static void visibleChildren_append (QQmlListProperty< QQuickItem > *prop, QQuickItem *o)
 
static qsizetype visibleChildren_count (QQmlListProperty< QQuickItem > *prop)
 
static QQuickItem * visibleChildren_at (QQmlListProperty< QQuickItem > *prop, qsizetype index)
 
static qsizetype transform_count (QQmlListProperty< QQuickTransform > *list)
 
static void transform_append (QQmlListProperty< QQuickTransform > *list, QQuickTransform *)
 
static QQuickTransform * transform_at (QQmlListProperty< QQuickTransform > *list, qsizetype)
 
static void transform_clear (QQmlListProperty< QQuickTransform > *list)
 
static bool focusNextPrev (QQuickItem *item, bool forward)
 QQuickItemPrivate::focusNextPrev focuses the next/prev item in the tab-focus-chain.
 
static QQuickItem * nextTabChildItem (const QQuickItem *item, int start)
 
static QQuickItem * prevTabChildItem (const QQuickItem *item, int start)
 
static QQuickItem * nextPrevItemInTabFocusChain (QQuickItem *item, bool forward)
 
static bool canAcceptTabFocus (QQuickItem *item)
 
- Static Public Member Functions inherited from QObjectPrivate
static bool removeConnection (Connection *c)
 
static QObjectPrivate * get (QObject *o)
 
static const QObjectPrivate * get (const QObject *o)
 
template<typename Func1 , typename Func2 >
static QMetaObject::Connection connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object *receiverPrivate, Func2 slot, Qt::ConnectionType type=Qt::AutoConnection)
 
template<typename Func1 , typename Func2 >
static bool disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object *receiverPrivate, Func2 slot)
 
static QMetaObject::Connection connectImpl (const QObject *sender, int signal_index, const QObject *receiver, void **slot, QtPrivate::QSlotObjectBase *slotObj, int type, const int *types, const QMetaObject *senderMetaObject)
 
static QMetaObject::Connection connect (const QObject *sender, int signal_index, QtPrivate::QSlotObjectBase *slotObj, Qt::ConnectionType type)
 
static QMetaObject::Connection connect (const QObject *sender, int signal_index, const QObject *receiver, QtPrivate::QSlotObjectBase *slotObj, Qt::ConnectionType type)
 
static bool disconnect (const QObject *sender, int signal_index, void **slot)
 
static bool disconnect (const QObject *sender, int signal_index, const QObject *receiver, void **slot)
 
- Protected Member Functions inherited from QQuickPaletteProviderPrivateBase< QQuickItem, QQuickItemPrivate >
void setCurrentColorGroup ()
 

Detailed Description

\qmltype Flow \instantiates QQuickFlow \inqmlmodule QtQuick \inherits Item

Positions its children side by side, wrapping as necessary.

The Flow item positions its child items like words on a page, wrapping them to create rows or columns of items.

Below is a Flow that contains various \l Text items:

Flow {
anchors.fill: parent
anchors.margins: 4
spacing: 10
Text { text: "Text"; font.pixelSize: 40 }
Text { text: "items"; font.pixelSize: 40 }
Text { text: "flowing"; font.pixelSize: 40 }
Text { text: "inside"; font.pixelSize: 40 }
Text { text: "a"; font.pixelSize: 40 }
Text { text: "Flow"; font.pixelSize: 40 }
Text { text: "item"; font.pixelSize: 40 }
}

The Flow item automatically positions the child \l Text items side by side, wrapping as necessary:

If an item within a Flow is not \l {Item::}{visible}, or if it has a width or height of 0, the item will not be laid out and it will not be visible within the Flow. Also, since a Flow automatically positions its children, a child item within a Flow should not set its \l {Item::x}{x} or \l {Item::y}{y} positions or anchor itself with any of the \l {Item::anchors}{anchor} properties.

For more information on using Flow and other related positioner-types, see \l{Item Positioners}.

See also
Column, Row, Grid, Positioner, {Qt Quick Examples - Positioners}
Since
5.6 \qmlproperty real QtQuick::Flow::padding \qmlproperty real QtQuick::Flow::topPadding \qmlproperty real QtQuick::Flow::leftPadding \qmlproperty real QtQuick::Flow::bottomPadding \qmlproperty real QtQuick::Flow::rightPadding

These properties hold the padding around the content.

\qmlproperty Transition QtQuick::Flow::populate

This property holds the transition to be run for items that are part of this positioner at the time of its creation. The transition is run when the positioner is first created.

The transition can use the \l ViewTransition property to access more details about the item that is being added. See the \l ViewTransition documentation for more details and examples on using these transitions.

See also
add, ViewTransition, {Qt Quick Examples - Positioners}

\qmlproperty Transition QtQuick::Flow::add

This property holds the transition to be run for items that are added to this positioner. For a positioner, this applies to:

\list

  • Items that are created or reparented as a child of the positioner after the positioner has been created
  • Child items that change their \l Item::visible property from false to true, and thus are now visible \endlist

The transition can use the \l ViewTransition property to access more details about the item that is being added. See the \l ViewTransition documentation for more details and examples on using these transitions.

Note
This transition is not applied to the items that are already part of the positioner at the time of its creation. In this case, the \l populate transition is applied instead.
See also
populate, ViewTransition, {Qt Quick Examples - Positioners}

\qmlproperty Transition QtQuick::Flow::move

This property holds the transition to run for items that have moved within the positioner. For a positioner, this applies to:

\list

  • Child items that move when they are displaced due to the addition, removal or rearrangement of other items in the positioner
  • Child items that are repositioned due to the resizing of other items in the positioner \endlist

The transition can use the \l ViewTransition property to access more details about the item that is being moved. Note, however, that for this move transition, the ViewTransition.targetIndexes and ViewTransition.targetItems lists are only set when this transition is triggered by the addition of other items in the positioner; in other cases, these lists will be empty. See the \l ViewTransition documentation for more details and examples on using these transitions.

See also
add, populate, ViewTransition, {Qt Quick Examples - Positioners}

\qmlproperty real QtQuick::Flow::spacing

spacing is the amount in pixels left empty between each adjacent item, and defaults to 0.

See also
Grid::spacing

\qmlmethod QtQuick::Flow::forceLayout()

Since
5.9

Flow typically positions its children once per frame. This means that inside script blocks it is possible for the underlying children to have changed, but the Flow to have not yet been updated accordingly.

This method forces the Flow to immediately respond to any outstanding changes in its children.

Note: methods in general should only be called after the Component has completed.

\qmlsignal QtQuick::Flow::positioningComplete()

Since
5.9

This signal is emitted when positioning has been completed.

Definition at line 1997 of file qquickpositioners.cpp.

Constructor & Destructor Documentation

◆ QQuickFlowPrivate()

QQuickFlowPrivate::QQuickFlowPrivate ( )
inline

Definition at line 2002 of file qquickpositioners.cpp.

Member Function Documentation

◆ effectiveLayoutDirectionChange()

void QQuickFlowPrivate::effectiveLayoutDirectionChange ( )
inlineoverridevirtual

Reimplemented from QQuickBasePositionerPrivate.

Definition at line 2006 of file qquickpositioners.cpp.

References emit.

Member Data Documentation

◆ flow

QQuickFlow::Flow QQuickFlowPrivate::flow

Definition at line 2014 of file qquickpositioners.cpp.

The documentation for this class was generated from the following file: