The QTreeView class provides a model/view implementation of a tree view. More...

Inheritance diagram for QTreeView:

Public Signals
void	collapsed (const QModelIndex &index)

void	expanded (const QModelIndex &index)

Public Signals inherited from QAbstractItemView
void	activated (const QModelIndex &index)

void	clicked (const QModelIndex &index)

void	doubleClicked (const QModelIndex &index)

void	entered (const QModelIndex &index)

void	iconSizeChanged (const QSize &size)

void	pressed (const QModelIndex &index)

void	viewportEntered ()

Public Signals inherited from QWidget
void	customContextMenuRequested (const QPoint &pos)

void	windowIconChanged (const QIcon &icon)

void	windowIconTextChanged (const QString &iconText)

void	windowTitleChanged (const QString &title)

Public Signals inherited from QObject
void	destroyed (QObject *obj=nullptr)

void	objectNameChanged (const QString &objectName)

Public Slots
void	collapse (const QModelIndex &index)

void	collapseAll ()

void	expand (const QModelIndex &index)

void	expandAll ()

void	expandToDepth (int depth)

void	hideColumn (int column)

void	resizeColumnToContents (int column)

void	showColumn (int column)

void	sortByColumn (int column)

Public Slots inherited from QAbstractItemView
void	clearSelection ()

void	edit (const QModelIndex &index)

virtual void	reset ()

void	scrollToBottom ()

void	scrollToTop ()

virtual void	selectAll ()

void	setCurrentIndex (const QModelIndex &index)

virtual void	setRootIndex (const QModelIndex &index)

void	update (const QModelIndex &index)

Public Slots inherited from QWidget
bool	close ()

void	hide ()

void	lower ()

void	raise ()

void	repaint ()

void	setDisabled (bool disable)

void	setEnabled (bool enable)

void	setFocus ()

void	setHidden (bool hidden)

void	setStyleSheet (const QString &styleSheet)

virtual void	setVisible (bool visible)

void	setWindowModified (bool modified)

void	setWindowTitle (const QString &title)

void	show ()

void	showFullScreen ()

void	showMaximized ()

void	showMinimized ()

void	showNormal ()

void	update ()

Public Slots inherited from QObject
void	deleteLater ()

Public Methods
	QTreeView (QWidget *parent=nullptr)

	~QTreeView ()

bool	allColumnsShowFocus () const

int	autoExpandDelay () const

int	columnAt (int x) const

int	columnViewportPosition (int column) const

int	columnWidth (int column) const

void	dataChanged (const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector< int > &roles=QVector< int >()) override

bool	expandsOnDoubleClick () const

QHeaderView *	header () const

int	indentation () const

QModelIndex	indexAbove (const QModelIndex &index) const

QModelIndex	indexAt (const QPoint &point) const override

QModelIndex	indexBelow (const QModelIndex &index) const

bool	isAnimated () const

bool	isColumnHidden (int column) const

bool	isExpanded (const QModelIndex &index) const

bool	isFirstColumnSpanned (int row, const QModelIndex &parent) const

bool	isHeaderHidden () const

bool	isRowHidden (int row, const QModelIndex &parent) const

bool	isSortingEnabled () const

bool	itemsExpandable () const

void	keyboardSearch (const QString &search) override

void	reset () override

void	resetIndentation ()

bool	rootIsDecorated () const

void	scrollTo (const QModelIndex &index, ScrollHint hint=EnsureVisible) override

void	selectAll () override

void	setAllColumnsShowFocus (bool enable)

void	setAnimated (bool enable)

void	setAutoExpandDelay (int delay)

void	setColumnHidden (int column, bool hide)

void	setColumnWidth (int column, int width)

void	setExpanded (const QModelIndex &index, bool expanded)

void	setExpandsOnDoubleClick (bool enable)

void	setFirstColumnSpanned (int row, const QModelIndex &parent, bool span)

void	setHeader (QHeaderView *header)

void	setHeaderHidden (bool hide)

void	setIndentation (int i)

void	setItemsExpandable (bool enable)

void	setModel (QAbstractItemModel *model) override

void	setRootIndex (const QModelIndex &index) override

void	setRootIsDecorated (bool show)

void	setRowHidden (int row, const QModelIndex &parent, bool hide)

void	setSelectionModel (QItemSelectionModel *selectionModel) override

void	setSortingEnabled (bool enable)

void	setTreePosition (int logicalIndex)

void	setUniformRowHeights (bool uniform)

void	setWordWrap (bool on)

void	sortByColumn (int column, Qt::SortOrder order)

int	treePosition () const

bool	uniformRowHeights () const

QRect	visualRect (const QModelIndex &index) const override

bool	wordWrap () const

Public Methods inherited from QAbstractItemView
	QAbstractItemView (QWidget *parent=nullptr)

	~QAbstractItemView ()

bool	alternatingRowColors () const

int	autoScrollMargin () const

void	closePersistentEditor (const QModelIndex &index)

QModelIndex	currentIndex () const

Qt::DropAction	defaultDropAction () const

DragDropMode	dragDropMode () const

bool	dragDropOverwriteMode () const

bool	dragEnabled () const

EditTriggers	editTriggers () const

bool	hasAutoScroll () const

ScrollMode	horizontalScrollMode () const

QSize	iconSize () const

QWidget *	indexWidget (const QModelIndex &index) const

QVariant	inputMethodQuery (Qt::InputMethodQuery query) const override

QAbstractItemDelegate *	itemDelegate () const

QAbstractItemDelegate *	itemDelegate (const QModelIndex &index) const

QAbstractItemDelegate *	itemDelegateForColumn (int column) const

QAbstractItemDelegate *	itemDelegateForRow (int row) const

QAbstractItemModel *	model () const

void	openPersistentEditor (const QModelIndex &index)

QModelIndex	rootIndex () const

QAbstractItemView::SelectionBehavior	selectionBehavior () const

QAbstractItemView::SelectionMode	selectionMode () const

QItemSelectionModel *	selectionModel () const

void	setAlternatingRowColors (bool enable)

void	setAutoScroll (bool enable)

void	setAutoScrollMargin (int margin)

void	setDefaultDropAction (Qt::DropAction dropAction)

void	setDragDropMode (DragDropMode behavior)

void	setDragDropOverwriteMode (bool overwrite)

void	setDragEnabled (bool enable)

void	setDropIndicatorShown (bool enable)

void	setEditTriggers (EditTriggers triggers)

void	setHorizontalScrollMode (ScrollMode mode)

void	setIconSize (const QSize &size)

void	setIndexWidget (const QModelIndex &index, QWidget *widget)

void	setItemDelegate (QAbstractItemDelegate *delegate)

void	setItemDelegateForColumn (int column, QAbstractItemDelegate *delegate)

void	setItemDelegateForRow (int row, QAbstractItemDelegate *delegate)

void	setSelectionBehavior (QAbstractItemView::SelectionBehavior behavior)

void	setSelectionMode (QAbstractItemView::SelectionMode mode)

void	setTabKeyNavigation (bool enable)

void	setTextElideMode (Qt::TextElideMode mode)

void	setVerticalScrollMode (ScrollMode mode)

bool	showDropIndicator () const

QSize	sizeHintForIndex (const QModelIndex &index) const

virtual int	sizeHintForRow (int row) const

bool	tabKeyNavigation () const

Qt::TextElideMode	textElideMode () const

ScrollMode	verticalScrollMode () const

Public Methods inherited from QAbstractScrollArea
	QAbstractScrollArea (QWidget *parent=nullptr)

	~QAbstractScrollArea ()

void	addScrollBarWidget (QWidget *widget, Qt::Alignment alignment)

QWidget *	cornerWidget () const

QScrollBar *	horizontalScrollBar () const

Qt::ScrollBarPolicy	horizontalScrollBarPolicy () const

QSize	maximumViewportSize () const

QSize	minimumSizeHint () const override

QWidgetList	scrollBarWidgets (Qt::Alignment alignment)

void	setCornerWidget (QWidget *widget)

void	setHorizontalScrollBar (QScrollBar *scrollBar)

void	setHorizontalScrollBarPolicy (Qt::ScrollBarPolicy policy)

void	setSizeAdjustPolicy (SizeAdjustPolicy policy)

virtual void	setupViewport (QWidget *viewport)

void	setVerticalScrollBar (QScrollBar *scrollBar)

void	setVerticalScrollBarPolicy (Qt::ScrollBarPolicy policy)

void	setViewport (QWidget *widget)

SizeAdjustPolicy	sizeAdjustPolicy () const

QSize	sizeHint () const override

QScrollBar *	verticalScrollBar () const

Qt::ScrollBarPolicy	verticalScrollBarPolicy () const

QWidget *	viewport () const

Public Methods inherited from QFrame
	QFrame (QWidget *parent=nullptr, Qt::WindowFlags flags=Qt::EmptyFlag)

	~QFrame ()

QRect	frameRect () const

Shadow	frameShadow () const

Shape	frameShape () const

int	frameStyle () const

int	frameWidth () const

int	lineWidth () const

int	midLineWidth () const

void	setFrameRect (const QRect &rect)

void	setFrameShadow (Shadow value)

void	setFrameShape (Shape value)

void	setFrameStyle (int style)

void	setLineWidth (int width)

void	setMidLineWidth (int width)

QSize	sizeHint () const override

Public Methods inherited from QWidget
	QWidget (QWidget *parent=nullptr, Qt::WindowFlags flags=Qt::EmptyFlag)

	~QWidget ()

bool	acceptDrops () const

QString	accessibleDescription () const

QString	accessibleName () const

QList< QAction * >	actions () const

void	activateWindow ()

void	addAction (QAction *action)

void	addActions (const QList< QAction * > &actions)

void	adjustSize ()

bool	autoFillBackground () const

QPalette::ColorRole	backgroundRole () const

QBackingStore *	backingStore () const

QSize	baseSize () const

QWidget *	childAt (const QPoint &position) const

QWidget *	childAt (int x, int y) const

QRect	childrenRect () const

QRegion	childrenRegion () const

void	clearFocus ()

void	clearMask ()

QMargins	contentsMargins () const

QRect	contentsRect () const

Qt::ContextMenuPolicy	contextMenuPolicy () const

QCursor	cursor () const

WId	effectiveWinId () const

void	ensurePolished () const

Qt::FocusPolicy	focusPolicy () const

QWidget *	focusProxy () const

QWidget *	focusWidget () const

const QFont &	font () const

QFontInfo	fontInfo () const

QFontMetrics	fontMetrics () const

QPalette::ColorRole	foregroundRole () const

QRect	frameGeometry () const

QSize	frameSize () const

const QRect &	geometry () const

void	getContentsMargins (int left, int top, int right, int bottom) const

QPixmap	grab (const QRect &rectangle=QRect (QPoint (0, 0), QSize (-1,-1)))

void	grabGesture (Qt::GestureType gestureType, Qt::GestureFlags flags=Qt::GestureFlags ())

void	grabKeyboard ()

void	grabMouse ()

void	grabMouse (const QCursor &cursor)

int	grabShortcut (const QKeySequence &key, Qt::ShortcutContext context=Qt::WindowShortcut)

QGraphicsEffect *	graphicsEffect () const

QGraphicsProxyWidget *	graphicsProxyWidget () const

bool	hasEditFocus () const

bool	hasFocus () const

virtual bool	hasHeightForWidth () const

bool	hasMouseTracking () const

int	height () const

virtual int	heightForWidth (int width) const

Qt::InputMethodHints	inputMethodHints () const

void	insertAction (QAction before, QAction action)

void	insertActions (QAction before, QList< QAction > actions)

bool	isActiveWindow () const

bool	isAncestorOf (const QWidget *child) const

bool	isEnabled () const

bool	isEnabledTo (const QWidget *parent) const

bool	isEnabledToTLW () const

bool	isFullScreen () const

bool	isHidden () const

bool	isMaximized () const

bool	isMinimized () const

bool	isModal () const

bool	isTopLevel () const

bool	isVisible () const

bool	isVisibleTo (const QWidget *parent) const

bool	isWindow () const

bool	isWindowModified () const

QLayout *	layout () const

Qt::LayoutDirection	layoutDirection () const

QLocale	locale () const

QPoint	mapFrom (const QWidget *parent, const QPoint &pos) const

QPoint	mapFromGlobal (const QPoint &pos) const

QPoint	mapFromParent (const QPoint &pos) const

QPoint	mapTo (const QWidget *parent, const QPoint &pos) const

QPoint	mapToGlobal (const QPoint &pos) const

QPoint	mapToParent (const QPoint &pos) const

QRegion	mask () const

int	maximumHeight () const

QSize	maximumSize () const

int	maximumWidth () const

int	minimumHeight () const

QSize	minimumSize () const

int	minimumWidth () const

void	move (const QPoint &point)

void	move (int x, int y)

QWidget *	nativeParentWidget () const

QWidget *	nextInFocusChain () const

QRect	normalGeometry () const

void	overrideWindowFlags (Qt::WindowFlags flags)

QPaintEngine *	paintEngine () const override

const QPalette &	palette () const

QWidget *	parentWidget () const

QPoint	pos () const

QWidget *	previousInFocusChain () const

QRect	rect () const

void	releaseKeyboard ()

void	releaseMouse ()

void	releaseShortcut (int id)

void	removeAction (QAction *action)

void	render (QPaintDevice *target, const QPoint &targetOffset=QPoint (), const QRegion &sourceRegion=QRegion (), RenderFlags renderFlags=RenderFlags (DrawWindowBackground\|DrawChildren))

void	render (QPainter *painter, const QPoint &targetOffset=QPoint (), const QRegion &sourceRegion=QRegion (), RenderFlags renderFlags=RenderFlags (DrawWindowBackground\|DrawChildren))

void	repaint (const QRect &rect)

void	repaint (const QRegion &region)

void	repaint (int x, int y, int w, int h)

void	resize (const QSize &size)

void	resize (int w, int h)

bool	restoreGeometry (const QByteArray &geometry)

QByteArray	saveGeometry () const

void	scroll (int dx, int dy)

void	scroll (int dx, int dy, const QRect &rect)

void	setAcceptDrops (bool on)

void	setAccessibleDescription (const QString &description)

void	setAccessibleName (const QString &name)

void	setAttribute (Qt::WidgetAttribute attribute, bool enable=true)

void	setAutoFillBackground (bool enable)

void	setBackgroundRole (QPalette::ColorRole role)

void	setBaseSize (const QSize &size)

void	setBaseSize (int basew, int baseh)

void	setContentsMargins (const QMargins &margins)

void	setContentsMargins (int left, int top, int right, int bottom)

void	setContextMenuPolicy (Qt::ContextMenuPolicy policy)

void	setCursor (const QCursor &cursor)

void	setEditFocus (bool enable)

void	setFixedHeight (int h)

void	setFixedSize (const QSize &size)

void	setFixedSize (int w, int h)

void	setFixedWidth (int w)

void	setFocus (Qt::FocusReason reason)

void	setFocusPolicy (Qt::FocusPolicy policy)

void	setFocusProxy (QWidget *widget)

void	setFont (const QFont &font)

void	setForegroundRole (QPalette::ColorRole role)

void	setGeometry (const QRect &rect)

void	setGeometry (int x, int y, int w, int h)

void	setGraphicsEffect (QGraphicsEffect *effect)

void	setInputMethodHints (Qt::InputMethodHints hints)

void	setLayout (QLayout *layout)

void	setLayoutDirection (Qt::LayoutDirection direction)

void	setLocale (const QLocale &locale)

void	setMask (const QBitmap &bitmap)

void	setMask (const QRegion &region)

void	setMaximumHeight (int maxh)

void	setMaximumSize (const QSize &size)

void	setMaximumSize (int maxw, int maxh)

void	setMaximumWidth (int maxw)

void	setMinimumHeight (int minh)

void	setMinimumSize (const QSize &size)

void	setMinimumSize (int minw, int minh)

void	setMinimumWidth (int minw)

void	setMouseTracking (bool enable)

void	setPalette (const QPalette &palette)

void	setParent (QWidget *parent)

void	setParent (QWidget *parent, Qt::WindowFlags flags)

void	setShortcutAutoRepeat (int id, bool enable=true)

void	setShortcutEnabled (int id, bool enable=true)

void	setSizeIncrement (const QSize &size)

void	setSizeIncrement (int w, int h)

void	setSizePolicy (QSizePolicy policy)

void	setSizePolicy (QSizePolicy::Policy horizontal, QSizePolicy::Policy vertical)

void	setStatusTip (const QString &data)

void	setStyle (QStyle *style)

void	setToolTip (const QString &data)

void	setToolTipDuration (int msec)

void	setUpdatesEnabled (bool enable)

void	setWhatsThis (const QString &str)

void	setWindowFilePath (const QString &filePath)

void	setWindowFlags (Qt::WindowFlags flags)

void	setWindowIcon (const QIcon &icon)

void	setWindowModality (Qt::WindowModality windowModality)

void	setWindowOpacity (qreal level)

void	setWindowRole (const QString &role)

void	setWindowState (Qt::WindowStates windowState)

QSize	size () const

QSize	sizeIncrement () const

QSizePolicy	sizePolicy () const

void	stackUnder (QWidget *widget)

QString	statusTip () const

QStyle *	style () const

QString	styleSheet () const

bool	testAttribute (Qt::WidgetAttribute attribute) const

QString	toolTip () const

int	toolTipDuration () const

QWidget *	topLevelWidget () const

bool	underMouse () const

void	ungrabGesture (Qt::GestureType gestureType)

void	unsetCursor ()

void	unsetLayoutDirection ()

void	unsetLocale ()

void	update (const QRect &rect)

void	update (const QRegion &region)

void	update (int x, int y, int w, int h)

void	updateGeometry ()

bool	updatesEnabled () const

QRegion	visibleRegion () const

QString	whatsThis () const

int	width () const

QWidget *	window () const

QString	windowFilePath () const

Qt::WindowFlags	windowFlags () const

QWindow *	windowHandle () const

QIcon	windowIcon () const

Qt::WindowModality	windowModality () const

qreal	windowOpacity () const

QString	windowRole () const

Qt::WindowStates	windowState () const

QString	windowTitle () const

Qt::WindowType	windowType () const

WId	winId () const

int	x () const

int	y () const

Public Methods inherited from QObject
	QObject (QObject *parent=nullptr)

	~QObject ()

bool	blockSignals (bool block)

const QList< QObject * > &	children () const

bool	connect (const QObject *sender, const QString &signalMethod, const QString &location, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	connect (const QObject *sender, const QString &signalMethod, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	disconnect (const QObject *receiver, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod, const QString &location, const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod=QString (), const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

void	dumpObjectInfo ()

void	dumpObjectTree ()

QList< QString >	dynamicPropertyNames () const

virtual bool	event (QEvent *event)

virtual bool	eventFilter (QObject watched, QEvent event)

template<typename T >
T	findChild (const QString &childName=QString ()) const

template<class T >
QList< T >	findChildren (const QRegularExpression &regExp, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

template<class T >
QList< T >	findChildren (const QString &childName=QString (), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

bool	inherits (const QString &className) const

void	installEventFilter (QObject *filterObj)

bool	isWidgetType () const

bool	isWindowType () const

void	killTimer (int id)

const QMetaObject *	metaObject () const

void	moveToThread (QThread *targetThread)

QString	objectName () const

QObject *	parent () const

template<class T = QVariant>
T	property (const QString &name) const

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setParent (QObject *parent)

bool	setProperty (const QString &name, const QVariant &value)

bool	signalsBlocked () const

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)

QThread *	thread () const

Public Methods inherited from QPaintDevice
virtual	~QPaintDevice ()

int	colorCount () const

int	depth () const

int	devicePixelRatio () const

qreal	devicePixelRatioF () const

int	height () const

int	heightMM () const

int	logicalDpiX () const

int	logicalDpiY () const

bool	paintingActive () const

int	physicalDpiX () const

int	physicalDpiY () const

int	width () const

int	widthMM () const

Protected Slots
void	columnCountChanged (int oldCount, int newCount)

void	columnMoved ()

void	columnResized (int column, int oldSize, int newSize)

void	rowsRemoved (const QModelIndex &parent, int start, int end)

Protected Slots inherited from QAbstractItemView
virtual void	closeEditor (QWidget *editor, QAbstractItemDelegate::EndEditHint hint)

virtual void	commitData (QWidget *editor)

virtual void	currentChanged (const QModelIndex &current, const QModelIndex &previous)

virtual void	dataChanged (const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector< int > &roles=QVector< int >())

virtual void	editorDestroyed (QObject *editor)

virtual void	rowsAboutToBeRemoved (const QModelIndex &parent, int start, int end)

virtual void	rowsInserted (const QModelIndex &parent, int start, int end)

virtual void	selectionChanged (const QItemSelection &selected, const QItemSelection &deselected)

virtual void	updateGeometries ()

Protected Slots inherited from QWidget
void	updateMicroFocus ()

Protected Methods
void	currentChanged (const QModelIndex &current, const QModelIndex &previous) override

void	dragMoveEvent (QDragMoveEvent *event) override

virtual void	drawBranches (QPainter *painter, const QRect &rect, const QModelIndex &index) const

virtual void	drawRow (QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const

void	drawTree (QPainter *painter, const QRegion &region) const

int	horizontalOffset () const override

void	horizontalScrollbarAction (int action) override

int	indexRowSizeHint (const QModelIndex &index) const

bool	isIndexHidden (const QModelIndex &index) const override

void	keyPressEvent (QKeyEvent *event) override

void	mouseDoubleClickEvent (QMouseEvent *event) override

void	mouseMoveEvent (QMouseEvent *event) override

void	mousePressEvent (QMouseEvent *event) override

void	mouseReleaseEvent (QMouseEvent *event) override

QModelIndex	moveCursor (CursorAction cursorAction, Qt::KeyboardModifiers modifiers) override

void	paintEvent (QPaintEvent *event) override

int	rowHeight (const QModelIndex &index) const

void	rowsAboutToBeRemoved (const QModelIndex &parent, int start, int end) override

void	rowsInserted (const QModelIndex &parent, int start, int end) override

void	scrollContentsBy (int dx, int dy) override

QModelIndexList	selectedIndexes () const override

void	selectionChanged (const QItemSelection &selected, const QItemSelection &deselected) override

void	setSelection (const QRect &rect, QItemSelectionModel::SelectionFlags command) override

int	sizeHintForColumn (int column) const override

void	timerEvent (QTimerEvent *event) override

void	updateGeometries () override

int	verticalOffset () const override

bool	viewportEvent (QEvent *event) override

QSize	viewportSizeHint () const override

QRegion	visualRegionForSelection (const QItemSelection &selection) const override

Protected Methods inherited from QAbstractItemView
QPoint	dirtyRegionOffset () const

void	dragEnterEvent (QDragEnterEvent *event) override

void	dragLeaveEvent (QDragLeaveEvent *event) override

void	dropEvent (QDropEvent *event) override

DropIndicatorPosition	dropIndicatorPosition () const

virtual bool	edit (const QModelIndex &index, EditTrigger trigger, QEvent *event)

bool	event (QEvent *event) override

void	executeDelayedItemsLayout ()

void	focusInEvent (QFocusEvent *event) override

bool	focusNextPrevChild (bool next) override

void	focusOutEvent (QFocusEvent *event) override

int	horizontalStepsPerItem () const

void	inputMethodEvent (QInputMethodEvent *event) override

void	resizeEvent (QResizeEvent *event) override

void	scheduleDelayedItemsLayout ()

void	scrollDirtyRegion (int dx, int dy)

virtual QItemSelectionModel::SelectionFlags	selectionCommand (const QModelIndex &index, const QEvent *event=nullptr) const

void	setDirtyRegion (const QRegion &region)

void	setHorizontalStepsPerItem (int steps)

void	setState (State state)

void	setVerticalStepsPerItem (int steps)

virtual void	startDrag (Qt::DropActions supportedActions)

State	state () const

void	timerEvent (QTimerEvent *event) override

int	verticalStepsPerItem () const

virtual QStyleOptionViewItem	viewOptions () const

Protected Methods inherited from QAbstractScrollArea
void	contextMenuEvent (QContextMenuEvent *event) override

void	dragEnterEvent (QDragEnterEvent *event) override

void	dragLeaveEvent (QDragLeaveEvent *event) override

void	dragMoveEvent (QDragMoveEvent *event) override

void	dropEvent (QDropEvent *event) override

bool	event (QEvent *event) override

void	keyPressEvent (QKeyEvent *event) override

void	mouseDoubleClickEvent (QMouseEvent *event) override

void	mouseMoveEvent (QMouseEvent *event) override

void	mousePressEvent (QMouseEvent *event) override

void	mouseReleaseEvent (QMouseEvent *event) override

void	paintEvent (QPaintEvent *event) override

void	resizeEvent (QResizeEvent *event) override

void	setViewportMargins (const QMargins &margins)

void	setViewportMargins (int left, int top, int right, int bottom)

QMargins	viewportMargins () const

void	wheelEvent (QWheelEvent *event) override

Protected Methods inherited from QFrame
void	changeEvent (QEvent *event) override

void	drawFrame (QPainter *painter)

bool	event (QEvent *event) override

void	initStyleOption (QStyleOptionFrame *option) const

void	paintEvent (QPaintEvent *event) override

Protected Methods inherited from QWidget
virtual void	actionEvent (QActionEvent *event)

virtual void	closeEvent (QCloseEvent *event)

void	create (WId window=0, bool initializeWindow=true, bool destroyOldWindow=true)

void	destroy (bool destroyWindow=true, bool destroySubWindows=true)

virtual void	enterEvent (QEvent *event)

bool	event (QEvent *event) override

bool	focusNextChild ()

bool	focusPreviousChild ()

virtual void	hideEvent (QHideEvent *event)

void	initPainter (QPainter *painter) const override

virtual void	keyReleaseEvent (QKeyEvent *event)

virtual void	leaveEvent (QEvent *event)

int	metric (PaintDeviceMetric metric) const override

virtual void	moveEvent (QMoveEvent *event)

virtual bool	nativeEvent (const QByteArray &eventType, void message, long result)

virtual void	showEvent (QShowEvent *event)

virtual void	tabletEvent (QTabletEvent *event)

Protected Methods inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signalMethod) const

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signalMethod) const

bool	isSignalConnected (const QMetaMethod &signalMethod) const

int	receivers (const QString &signal) const

QObject *	sender () const

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *event)

Protected Methods inherited from QPaintDevice
	QPaintDevice ()

Properties
	allColumnsShowFocus

	animated

	autoExpandDelay

	expandsOnDoubleClick

	headerHidden

	indentation

	itemsExpandable

	rootIsDecorated

	sortingEnabled

	uniformRowHeights

	wordWrap

Properties inherited from QAbstractItemView
	alternatingRowColors

	autoScroll

	autoScrollMargin

	defaultDropAction

	dragDropMode

	dragDropOverwriteMode

	dragEnabled

	editTriggers

	horizontalScrollMode

	iconSize

	selectionBehavior

	selectionMode

	showDropIndicator

	tabKeyNavigation

	textElideMode

	verticalScrollMode

Properties inherited from QAbstractScrollArea
	horizontalScrollBarPolicy

	verticalScrollBarPolicy

Properties inherited from QFrame
	frameRect

	frameShadow

	frameShape

	frameWidth

	lineWidth

	midLineWidth

Properties inherited from QWidget
	acceptDrops

	accessibleDescription

	accessibleName

	autoFillBackground

	baseSize

	childrenRect

	childrenRegion

	contextMenuPolicy

	cursor

	enabled

	focus

	focusPolicy

	font

	frameGeometry

	frameSize

	fullScreen

	geometry

	height

	inputMethodHints

	isActiveWindow

	layoutDirection

	locale

	maximized

	maximumHeight

	maximumSize

	maximumWidth

	minimized

	minimumHeight

	minimumSize

	minimumSizeHint

	minimumWidth

	modal

	mouseTracking

	normalGeometry

	palette

	pos

	rect

	size

	sizeHint

	sizeIncrement

	sizePolicy

	statusTip

	styleSheet

	toolTip

	updatesEnabled

	visible

	whatsThis

	width

	windowFilePath

	windowFlags

	windowIcon

	windowIconText

	windowModality

	windowModified

	windowOpacity

	windowTitle

	x

	y

Properties inherited from QObject
	objectName

Additional Inherited Members
Public Typedefs inherited from QAbstractItemView
using	EditTriggers = QFlags< EditTrigger >

Public Typedefs inherited from QWidget
using	RenderFlags = QFlags< RenderFlag >

Public Types inherited from QAbstractItemView
enum	DragDropMode

enum	EditTrigger

enum	ScrollHint

enum	ScrollMode

enum	SelectionBehavior

enum	SelectionMode

Public Types inherited from QFrame
enum	Shadow

enum	Shape

enum	StyleMask

Public Types inherited from QWidget
enum	RenderFlag

Public Types inherited from QPaintDevice
enum	PaintDeviceMetric

Static Public Methods inherited from QWidget
static QWidget *	createWindowContainer (QWindow window, QWidget parent=nullptr, Qt::WindowFlags flags=Qt::EmptyFlag)

static QWidget *	find (WId id)

static QWidget *	keyboardGrabber ()

static QWidget *	mouseGrabber ()

static void	setTabOrder (QWidget firstWidget, QWidget secondWidget)

Static Public Methods inherited from QObject
static bool	connect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

static bool	connect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection, const QString &location=QString ())

static bool	connect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...), Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotLambda, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, std::nullptr_t, const QObject receiver, std::nullptr_t)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...))

template<class Sender , class SignalClass , class... SignalArgs, class Receiver >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, std::nullptr_t slotMethod=nullptr)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotMethod)

static QMetaObject &	staticMetaObject ()

static QString	tr (const char text, const char comment=nullptr, std::optional< int > numArg=std::optional< int >())

Protected Types inherited from QAbstractItemView
enum	CursorAction

enum	DropIndicatorPosition

enum	State

Related Functions inherited from QWidget
	QWidgetList

	WId

Related Functions inherited from QObject
T	qobject_cast (QObject *object)

	QObjectList

Detailed Description

The QTreeView class provides a model/view implementation of a tree view. This class can only access data which is stored in a model class. The model/view architecture ensures the contents of the tree view are updated as the model changes.

Items which have children can be expanded or collapsed and the children will become visible and hidden respectively. When this state changes a collapsed() or expanded() signal is emitted. The signal will pass the model index of the item which changed state.

The amount of indentation used to indicate levels of hierarchy is controlled by the indentation property.

The horizontal header displayed at the top of a tree view can be configured by calling the header() method and then using methods from the QHeaderView class. By default the header is configured with the QHeaderView::stretchLastSection property set to true.

The QTreeView class is one of the Model/View Classes.

Example

The following is a simple example. The contents of a directory are supplied by a QFileSystemModel and then displayed using a tree view.

QFileSystemModel *model = new QFileSystemModel;
model->setRootPath(QDir::currentPath());
 
QTreeView *tree = new QTreeView(splitter);
tree->setModel(model);

Key Bindings

QTreeView supports a set of key bindings which enable the user to navigate the tree view and interact with the contents of items.

Key	Action
Up	Moves the cursor to the previous row
Down	Moves the cursor to the next row
Right	Displays the children of the current item, expands the branch
Left	Hides the children of the current item, collapses the branch
Plus	Same as RightArrow
Minus	Same as LeftArrow
Asterisk	Expands all children of the current item
PageUp	Moves the cursor up one page
PageDown	Moves the cursor down one page
Home	Moves the cursor to the first row
End	Moves the cursor to the last row
F2	Enters an edit mode on the current item if appropriate flags are set
Escape	Cancels the editing process and revert any changes

Improving Performance

It is possible to give the tree view hints about the data in the model to improve performance when displaying a large number of items. One approach is for views where the row height is equal, set the uniformRowHeights property to true.

See also: QListView, QTreeWidget, QAbstractItemModel, QAbstractItemView

Constructor & Destructor Documentation

QTreeView::QTreeView ( QWidget * parent = nullptr )

explicit

Constructs a tree view with the given parent.

See also: QAbstractItemModel

QTreeView::~QTreeView ( )

Destroys the tree view.

Method Documentation

bool QTreeView::allColumnsShowFocus ( ) const

Returns the value of the property.

int QTreeView::autoExpandDelay ( ) const

Returns the value of the property.

void QTreeView::collapse ( const QModelIndex & index )

slot

Collapses the model item specified by the index.

See also: collapsed()

void QTreeView::collapseAll ( )

slot

Collapses all expanded items.

See also: expandAll(), expand(), collapse(), setExpanded()

void QTreeView::collapsed ( const QModelIndex & index )

signal

This signal is emitted when the item specified by index is collapsed.

int QTreeView::columnAt ( int x ) const

Returns the column in the tree view whose header covers the x coordinate given.

void QTreeView::columnCountChanged	(	int	oldCount,
		int	newCount
	)

protectedslot

Informs the tree view that the number of columns in the tree view has changed from oldCount to newCount.

void QTreeView::columnMoved ( )

protectedslot

This slot is called after a column is moved.

void QTreeView::columnResized	(	int	column,
		int	oldSize,
		int	newSize
	)

protectedslot

This method is called when the size of column is changed in the header. The oldSize and newSize are in pixels.

See also: setColumnWidth()

int QTreeView::columnViewportPosition ( int column ) const

Returns the horizontal position of the column in the viewport.

int QTreeView::columnWidth ( int column ) const

Returns the width of the column.

See also: resizeColumnToContents(), setColumnWidth()

void QTreeView::currentChanged	(	const QModelIndex &	current,
		const QModelIndex &	previous
	)

overrideprotected

Reimplemented from QAbstractItemView::currentChanged()

void QTreeView::dataChanged	(	const QModelIndex &	topLeft,
		const QModelIndex &	bottomRight,
		const QVector< int > &	roles = `QVector<int>()`
	)

override

Reimplemented from QAbstractItemView::dataChanged()

void QTreeView::dragMoveEvent ( QDragMoveEvent * event )

overrideprotectedvirtual

Reimplemented from QAbstractItemView::dragMoveEvent()

void QTreeView::drawBranches	(	QPainter *	painter,
		const QRect &	rect,
		const QModelIndex &	index
	)		const

protectedvirtual

Draws the branches in the tree view on the same row as the model item index, using the painter given. The branches are drawn in the rectangle specified by rect.

void QTreeView::drawRow	(	QPainter *	painter,
		const QStyleOptionViewItem &	option,
		const QModelIndex &	index
	)		const

protectedvirtual

Draws the row in the tree view that contains the model item index, using the painter given. The option controls how the item is displayed.

See also: setAlternatingRowColors()

void QTreeView::drawTree	(	QPainter *	painter,
		const QRegion &	region
	)		const

protected

Draws the part of the tree intersecting the given region using the specified painter.

See also: paintEvent()

void QTreeView::expand ( const QModelIndex & index )

slot

Expands the model item specified by the index.

See also: expanded()

void QTreeView::expandAll ( )

slot

Expands all expandable items.

See also: collapseAll(), expand(), collapse(), setExpanded()

void QTreeView::expanded ( const QModelIndex & index )

signal

This signal is emitted when the item specified by index is expanded.

See also: setExpanded()

bool QTreeView::expandsOnDoubleClick ( ) const

Returns the value of the property.

void QTreeView::expandToDepth ( int depth )

slot

Expands all expandable items to the given depth.

See also: expandAll(), collapseAll(), expand(), collapse(), setExpanded()

QHeaderView * QTreeView::header ( ) const

Returns the header for the tree view.

See also: setHeader(), QAbstractItemModel::headerData()

void QTreeView::hideColumn ( int column )

slot

Hides the given column. This method should only be called after the model has been initialized since the view needs to know the number of columns.

See also: showColumn(), setColumnHidden()

int QTreeView::horizontalOffset ( ) const

overrideprotectedvirtual

Returns the horizontal offset of the items in the tree view. The tree view uses the horizontal header section positions to determine the positions of columns in the view.

See also: verticalOffset()

Implements QAbstractItemView::horizontalOffset()

void QTreeView::horizontalScrollbarAction ( int action )

overrideprotected

Returns the value of the property.

int QTreeView::indentation ( ) const

Returns the value of the property.

QModelIndex QTreeView::indexAbove ( const QModelIndex & index ) const

Returns the model index of the item above index.

QModelIndex QTreeView::indexAt ( const QPoint & point ) const

overridevirtual

Implements QAbstractItemView::indexAt()

QModelIndex QTreeView::indexBelow ( const QModelIndex & index ) const

Returns the model index of the item below index.

int QTreeView::indexRowSizeHint ( const QModelIndex & index ) const

protected

Returns the size hint for the row indicated by index.

See also: sizeHintForColumn(), uniformRowHeights()

bool QTreeView::isAnimated ( ) const

Returns the value of the property.

bool QTreeView::isColumnHidden ( int column ) const

Returns true if the column is hidden, otherwise returns false.

See also: hideColumn(), isRowHidden()

bool QTreeView::isExpanded ( const QModelIndex & index ) const

Returns true if the model item index is expanded, otherwise returns false.

See also: expand(), expanded(), setExpanded()

bool QTreeView::isFirstColumnSpanned	(	int	row,
		const QModelIndex &	parent
	)		const

Returns true if the item in first column in the given row of the parent is spanning all the columns, otherwise returns false.

See also: setFirstColumnSpanned()

bool QTreeView::isHeaderHidden ( ) const

Returns the value of the property.

bool QTreeView::isIndexHidden ( const QModelIndex & index ) const

overrideprotectedvirtual

Implements QAbstractItemView::isIndexHidden()

bool QTreeView::isRowHidden	(	int	row,
		const QModelIndex &	parent
	)		const

Returns true if the item in the given row of the parent is hidden, otherwise returns false.

See also: setRowHidden(), isColumnHidden()

bool QTreeView::isSortingEnabled ( ) const

Returns the value of the property.

bool QTreeView::itemsExpandable ( ) const

Returns the value of the property.

void QTreeView::keyboardSearch ( const QString & search )

overridevirtual

Reimplemented from QAbstractItemView::keyboardSearch()

void QTreeView::keyPressEvent ( QKeyEvent * event )

overrideprotectedvirtual

Reimplemented from QAbstractItemView::keyPressEvent()

void QTreeView::mouseDoubleClickEvent ( QMouseEvent * event )

overrideprotectedvirtual

Reimplemented from QAbstractItemView::mouseDoubleClickEvent()

void QTreeView::mouseMoveEvent ( QMouseEvent * event )

overrideprotectedvirtual

Reimplemented from QAbstractItemView::mouseMoveEvent()

void QTreeView::mousePressEvent ( QMouseEvent * event )

overrideprotectedvirtual

Reimplemented from QAbstractItemView::mousePressEvent()

void QTreeView::mouseReleaseEvent ( QMouseEvent * event )

overrideprotectedvirtual

Reimplemented from QAbstractItemView::mouseReleaseEvent()

QModelIndex QTreeView::moveCursor	(	CursorAction	cursorAction,
		Qt::KeyboardModifiers	modifiers
	)

overrideprotectedvirtual

Move the cursor in the way described by cursorAction, using the information provided by the button modifiers.

Implements QAbstractItemView::moveCursor()

void QTreeView::paintEvent ( QPaintEvent * event )

overrideprotectedvirtual

Reimplemented from QWidget::paintEvent()

void QTreeView::reset ( )

override

Reimplemented from QAbstractItemView::reset()

void QTreeView::resetIndentation ( )

Resets the value of the property to the default, which is style dependent.

void QTreeView::resizeColumnToContents ( int column )

slot

Resizes the given column to the size of its contents.

See also: columnWidth(), setColumnWidth()

bool QTreeView::rootIsDecorated ( ) const

Returns the value of the property.

int QTreeView::rowHeight ( const QModelIndex & index ) const

protected

Returns the height of the row indicated by the given index.

See also: indexRowSizeHint()

void QTreeView::rowsAboutToBeRemoved	(	const QModelIndex &	parent,
		int	start,
		int	end
	)

overrideprotected

Informs the view that the rows from the start row to the end row inclusive are about to be removed from the given parent model item.

void QTreeView::rowsInserted	(	const QModelIndex &	parent,
		int	start,
		int	end
	)

overrideprotected

Informs the view that the rows from the start row to the end row inclusive have been inserted into the parent model item.

void QTreeView::rowsRemoved	(	const QModelIndex &	parent,
		int	start,
		int	end
	)

protectedslot

Informs the view that the rows from the start row to the end row inclusive have been removed from the given parent model item.

void QTreeView::scrollContentsBy	(	int	dx,
		int	dy
	)

overrideprotectedvirtual

Scrolls the contents of the tree view by (dx, dy).

Reimplemented from QAbstractScrollArea::scrollContentsBy()

void QTreeView::scrollTo	(	const QModelIndex &	index,
		ScrollHint	hint = `EnsureVisible`
	)

overridevirtual

Scroll the contents of the tree view until the given model item index is visible. The hint parameter specifies more precisely where the item should be located after the operation. If any of the parents of the model item are collapsed, they will be expanded to ensure that the model item is visible.

Implements QAbstractItemView::scrollTo()

void QTreeView::selectAll ( )

override

Reimplemented from QAbstractItemView::selectAll()

QModelIndexList QTreeView::selectedIndexes ( ) const

overrideprotectedvirtual

Reimplemented from QAbstractItemView::selectedIndexes()

void QTreeView::selectionChanged	(	const QItemSelection &	selected,
		const QItemSelection &	deselected
	)

overrideprotected

Reimplemented from QAbstractItemView::selectionChanged()

void QTreeView::setAllColumnsShowFocus ( bool enable )

Sets the value of the property to enable.

void QTreeView::setAnimated ( bool enable )

Sets the value of the property to enable.

void QTreeView::setAutoExpandDelay ( int delay )

Sets the value of the property to delay.

void QTreeView::setColumnHidden	(	int	column,
		bool	hide
	)

If hide is true the column is hidden, otherwise the column is shown.

See also: isColumnHidden(), hideColumn(), setRowHidden()

void QTreeView::setColumnWidth	(	int	column,
		int	width
	)

Sets the width of the given column to the width specified.

See also: columnWidth(), resizeColumnToContents()

void QTreeView::setExpanded	(	const QModelIndex &	index,
		bool	expanded
	)

Sets the item referred to by index to either collapsed or expanded, depending on the value of expanded.

See also: expanded(), expand(), isExpanded()

void QTreeView::setExpandsOnDoubleClick ( bool enable )

Sets the value of the property to enable.

void QTreeView::setFirstColumnSpanned	(	int	row,
		const QModelIndex &	parent,
		bool	span
	)

If span is true the item in the first column in the row with the given parent is set to span all columns, otherwise all items on the row are shown.

See also: isFirstColumnSpanned()

void QTreeView::setHeader ( QHeaderView * header )

Sets the header for the tree view, to the given header. The view takes ownership over the given header and deletes it when a new header is set.

See also: QAbstractItemModel::headerData()

void QTreeView::setHeaderHidden ( bool hide )

Sets the value of the property to hide.

void QTreeView::setIndentation ( int i )

Sets the value of the property to i.

void QTreeView::setItemsExpandable ( bool enable )

Sets the value of the property to enable.

void QTreeView::setModel ( QAbstractItemModel * model )

overridevirtual

Reimplemented from QAbstractItemView::setModel()

void QTreeView::setRootIndex ( const QModelIndex & index )

override

Reimplemented from QAbstractItemView::setRootIndex()

void QTreeView::setRootIsDecorated ( bool show )

Sets the value of the property to show.

void QTreeView::setRowHidden	(	int	row,
		const QModelIndex &	parent,
		bool	hide
	)

If hide is true the row with the given parent is hidden, otherwise the row is shown.

See also: isRowHidden(), setColumnHidden()

void QTreeView::setSelection	(	const QRect &	rect,
		QItemSelectionModel::SelectionFlags	command
	)

overrideprotectedvirtual

Applies the selection command to the items in or touched by the given rect.

See also: selectionCommand()

Implements QAbstractItemView::setSelection()

void QTreeView::setSelectionModel ( QItemSelectionModel * selectionModel )

overridevirtual

Reimplemented from QAbstractItemView::setSelectionModel()

Reimplemented in QTreeWidget::setSelectionModel()

void QTreeView::setSortingEnabled ( bool enable )

Sets the value of the property to enable.

This method calls setSortIndicatorShown(enable) and setSectionsClickable(enable). It sorts the data based on the current column. A signal/slot connection is automatically made so when the user clicks on the column heading the current column is selected and the data sorted. Clicking again in the current column will toggle the Ascending and Descending sort order.

void QTreeView::setTreePosition ( int logicalIndex )

Sets the value of the property to logicalIndex.

void QTreeView::setUniformRowHeights ( bool uniform )

Sets the value of the property to uniform.

void QTreeView::setWordWrap ( bool on )

Sets the value of the property to on.

void QTreeView::showColumn ( int column )

slot

Shows the given column in the tree view.

See also: hideColumn(), setColumnHidden()

int QTreeView::sizeHintForColumn ( int column ) const

overrideprotectedvirtual

Returns the size hint for the column's width or -1 if there is no model. If you need to set the width of a given column to a fixed value, call QHeaderView::resizeSection() on the view's header.

If you reimplement this method in a subclass, the value you return is only used when resizeColumnToContents() is called. In that case, if a larger column width is required by either the view's header or the item delegate, that width will be used instead.

See also: QWidget::sizeHint, header()

Reimplemented from QAbstractItemView::sizeHintForColumn()

void QTreeView::sortByColumn ( int column )

deprecatedslot

Deprecated:

Sorts the model by the values in the given column.

void QTreeView::sortByColumn	(	int	column,
		Qt::SortOrder	order
	)

Configures sorting by the values in the given column and order. The value for column may be -1 in which case no sort indicator will be shown and the model will return to its natural, unsorted order. Not all models support this operation.

See also: sortingEnabled

void QTreeView::timerEvent ( QTimerEvent * event )

overrideprotected

Reimplemented from QAbstractItemView::timerEvent()

int QTreeView::treePosition ( ) const

Returns the value of the property.

bool QTreeView::uniformRowHeights ( ) const

Returns the value of the property.

void QTreeView::updateGeometries ( )

overrideprotected

Reimplemented from QAbstractItemView::updateGeometries()

int QTreeView::verticalOffset ( ) const

overrideprotectedvirtual

Returns the vertical offset of the items in the tree view.

See also: horizontalOffset()

Implements QAbstractItemView::verticalOffset()

bool QTreeView::viewportEvent ( QEvent * event )

overrideprotectedvirtual

Reimplemented from QAbstractItemView::viewportEvent()

QSize QTreeView::viewportSizeHint ( ) const

overrideprotectedvirtual

Returns the value of the property.

Reimplemented from QAbstractItemView::viewportSizeHint()

QRect QTreeView::visualRect ( const QModelIndex & index ) const

overridevirtual

Returns the rectangle on the viewport occupied by the item at index. If the index is not visible or explicitly hidden, the returned rectangle is invalid.

Implements QAbstractItemView::visualRect()

QRegion QTreeView::visualRegionForSelection ( const QItemSelection & selection ) const

overrideprotectedvirtual

Returns the rectangle from the viewport of the items in the given selection. The returned region only contains rectangles intersecting (or included in) the viewport.

Implements QAbstractItemView::visualRegionForSelection()

bool QTreeView::wordWrap ( ) const

Returns the value of the property.

Property Documentation

QTreeView::allColumnsShowFocus

This property holds whether items should show keyboard focus using all columns. If this property is true all columns will show focus, otherwise only one column will show focus.

The default is false.

Properties	Class Methods
read	allColumnsShowFocus
write	setAllColumnsShowFocus

QTreeView::animated

This property holds whether animations are enabled. If this property is true the tree view will animate expansion and collapsing of branches. If this property is false, the tree view will expand or collapse branches immediately without showing the animation.

By default this property is false.

Properties	Class Methods
read	isAnimated
write	setAnimated

QTreeView::autoExpandDelay

This property holds the delay time before items in a tree are opened during a drag and drop operation.

This delay time is the number of milliseconds the user must hover over a tree item before the item will automatically open or close. If the time is set to less then 0 then hovering will have no effect.

The default for this property is -1 which disables auto expansion.

Properties	Class Methods
read	autoExpandDelay
write	setAutoExpandDelay

QTreeView::expandsOnDoubleClick

This property holds whether the items can be expanded by double clicking.

The default value is true.

See also: itemsExpandable

Properties	Class Methods
read	expandsOnDoubleClick
write	setExpandsOnDoubleClick

QTreeView::headerHidden

This property holds whether the header is shown or not. If this property is true, the header is not shown otherwise it is.

The default value is false.

See also: header()

Properties	Class Methods
read	isHeaderHidden
write	setHeaderHidden

QTreeView::indentation

This property holds the indentation measured in pixels for each level in the tree view. For top level items the indentation specifies the horizontal distance from the viewport edge to the items in the first column. For child items it specifies the indentation from their parent.

By default this property has a value of 20.

Properties	Class Methods
read	indentation
write	setIndentation

QTreeView::itemsExpandable

This property holds whether the user can expand and collapse items interactively.

By default this property is true.

Properties	Class Methods
read	itemsExpandable
write	setItemsExpandable

QTreeView::rootIsDecorated

This property holds whether to show controls for expanding and collapsing top level items.

Items with children are typically shown with controls to expand and collapse them, allowing their children to be shown or hidden. If this property is false, these controls are not shown for top level items. This can be used to make a single level tree structure appear like a simple list of items.

By default this property is true.

Properties	Class Methods
read	rootIsDecorated
write	setRootIsDecorated

QTreeView::sortingEnabled

This property holds whether sorting is enabled. If this property is true sorting is enabled for the tree. If the property is false, sorting is not enabled. In order to avoid performance issues it is recommended to wait until items are inserted to enable sorting.

The default value is false.

See also: sortByColumn()

Properties	Class Methods
read	isSortingEnabled
write	setSortingEnabled

QTreeView::uniformRowHeights

This property holds whether all items in the tree view have the same height. The height is obtained from the first item in the view and updated when the data changes for that item. Only set this property if all rows are guaranteed to have the same height. This enables the view to layout items without loading all of the items in the model.

By default this property is false.

Properties	Class Methods
read	uniformRowHeights
write	setUniformRowHeights

QTreeView::wordWrap

This property holds the item text word wrapping policy. If this property is true then the item text can be wrapped at word breaks, otherwise it is never wrapped. When wrapping is enabled the cell may still not be expanded to fit all text. An ellipsis will be inserted according to the current textElideMode.

This property is false by default.

Properties	Class Methods
read	wordWrap
write	setWordWrap

Public Signals

Public Slots

Public Methods

Protected Slots

Protected Methods

Properties

Additional Inherited Members

Detailed Description

Example

Key Bindings

Improving Performance

Constructor & Destructor Documentation

Method Documentation

Property Documentation