#include <qtextdocumentlayout_p.h>

Inheritance diagram for QTextDocumentLayout:

Collaboration diagram for QTextDocumentLayout:

Public Member Functions
	QTextDocumentLayout (QTextDocument *doc)

void	draw (QPainter *painter, const PaintContext &context) override
	Draws the layout with the given painter using the given context.

int	hitTest (const QPointF &point, Qt::HitTestAccuracy accuracy) const override
	Returns the cursor position for the given point with the specified accuracy.

int	pageCount () const override
	Returns the number of pages contained in the layout.

QSizeF	documentSize () const override
	Returns the total size of the document's layout.

void	setCursorWidth (int width)

int	cursorWidth () const

void	setFixedColumnWidth (int width)

void	setViewport (const QRectF &viewport)

virtual QRectF	frameBoundingRect (QTextFrame *frame) const override
	Returns the bounding rectangle of frame.

virtual QRectF	blockBoundingRect (const QTextBlock &block) const override
	Returns the bounding rectangle of block.

QRectF	tableBoundingRect (QTextTable *table) const

QRectF	tableCellBoundingRect (QTextTable *table, const QTextTableCell &cell) const

int	layoutStatus () const

int	dynamicPageCount () const

QSizeF	dynamicDocumentSize () const

void	ensureLayouted (qreal)

qreal	idealWidth () const

bool	contentHasAlignment () const

Public Member Functions inherited from QAbstractTextDocumentLayout
	QAbstractTextDocumentLayout (QTextDocument *doc)
	\variable QAbstractTextDocumentLayout::Selection::format

	~QAbstractTextDocumentLayout ()

QString	anchorAt (const QPointF &pos) const
	Returns the reference of the anchor the given position, or an empty string if no anchor exists at that point.

QString	imageAt (const QPointF &pos) const

QTextFormat	formatAt (const QPointF &pos) const

QTextBlock	blockWithMarkerAt (const QPointF &pos) const

void	setPaintDevice (QPaintDevice *device)
	Sets the paint device used for rendering the document's layout to the given device.

QPaintDevice *	paintDevice () const
	Returns the paint device used to render the document's layout.

QTextDocument *	document () const
	Returns the text document that this layout is operating on.

void	registerHandler (int objectType, QObject *component)
	Registers the given component as a handler for items of the given objectType.

void	unregisterHandler (int objectType, QObject *component=nullptr)

QTextObjectInterface *	handlerForObject (int objectType) const
	Returns a handler for objects of the given objectType.

Public Member Functions inherited from QObject
Q_INVOKABLE	QObject (QObject *parent=nullptr)
	Constructs an object with parent object parent.

virtual	~QObject ()
	Destroys the object, deleting all its child objects.

virtual bool	event (QEvent *event)
	This virtual function receives events to an object and should return true if the event e was recognized and processed.

virtual bool	eventFilter (QObject watched, QEvent event)
	Filters events if this object has been installed as an event filter for the watched object.

QString	objectName () const

Q_WEAK_OVERLOAD void	setObjectName (const QString &name)
	Sets the object's name to name.

void	setObjectName (QAnyStringView name)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

QBindable< QString >	bindableObjectName ()

bool	isWidgetType () const
	Returns `true` if the object is a widget; otherwise returns `false`.

bool	isWindowType () const
	Returns `true` if the object is a window; otherwise returns `false`.

bool	isQuickItemType () const
	Returns `true` if the object is a QQuickItem; otherwise returns `false`.

bool	signalsBlocked () const noexcept
	Returns `true` if signals are blocked; otherwise returns `false`.

bool	blockSignals (bool b) noexcept
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it).

QThread *	thread () const
	Returns the thread in which the object lives.

bool	moveToThread (QThread *thread QT6_DECL_NEW_OVERLOAD_TAIL)
	Changes the thread affinity for this object and its children and returns `true` on success.

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)
	This is an overloaded function that will start a timer of type timerType and a timeout of interval milliseconds.

int	startTimer (std::chrono::nanoseconds time, Qt::TimerType timerType=Qt::CoarseTimer)

void	killTimer (int id)
	Kills the timer with timer identifier, id.

void	killTimer (Qt::TimerId id)

template<typename T >
T	findChild (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	Returns the child of this object that can be cast into type T and that is called name, or \nullptr if there is no such object.

template<typename T >
QList< T >	findChildren (QAnyStringView aName, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects.

template<typename T >
T	findChild (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

template<typename T >
QList< T >	findChildren (Qt::FindChildOptions options=Qt::FindChildrenRecursively) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

const QObjectList &	children () const
	Returns a list of child objects.

void	setParent (QObject *parent)
	Makes the object a child of parent.

void	installEventFilter (QObject *filterObj)
	Installs an event filter filterObj on this object.

void	removeEventFilter (QObject *obj)
	Removes an event filter object obj from this object.

QMetaObject::Connection	connect (const QObject sender, const char signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const

bool	disconnect (const char signal=nullptr, const QObject receiver=nullptr, const char *member=nullptr) const

bool	disconnect (const QObject receiver, const char member=nullptr) const

void	dumpObjectTree () const
	Dumps a tree of children to the debug output.

void	dumpObjectInfo () const
	Dumps information about signal connections, etc.

bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value.

bool	setProperty (const char *name, QVariant &&value)

QVariant	property (const char *name) const
	Returns the value of the object's name property.

QList< QByteArray >	dynamicPropertyNames () const

QBindingStorage *	bindingStorage ()

const QBindingStorage *	bindingStorage () const

QObject *	parent () const
	Returns a pointer to the parent object.

bool	inherits (const char *classname) const
	Returns `true` if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns `false`.

Protected Member Functions
void	documentChanged (int from, int oldLength, int length) override
	This function is called whenever the contents of the document change.

void	resizeInlineObject (QTextInlineObject item, int posInDocument, const QTextFormat &format) override
	Sets the size of the inline object item corresponding to the text format.

void	positionInlineObject (QTextInlineObject item, int posInDocument, const QTextFormat &format) override
	Lays out the inline object item using the given text format.

void	drawInlineObject (QPainter *p, const QRectF &rect, QTextInlineObject item, int posInDocument, const QTextFormat &format) override
	This function is called to draw the inline object, object, with the given painter within the rectangle specified by rect using the specified text format.

virtual void	timerEvent (QTimerEvent *e) override
	This event handler can be reimplemented in a subclass to receive timer events for the object.

Protected Member Functions inherited from QAbstractTextDocumentLayout
	QAbstractTextDocumentLayout (QAbstractTextDocumentLayoutPrivate &, QTextDocument *)

int	formatIndex (int pos)

QTextCharFormat	format (int pos)
	Returns the character format that is applicable at the given position.

Protected Member Functions inherited from QObject
QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns \nullptr.

int	senderSignalIndex () const

int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal.

bool	isSignalConnected (const QMetaMethod &signal) const

virtual void	childEvent (QChildEvent *event)
	This event handler can be reimplemented in a subclass to receive child events.

virtual void	customEvent (QEvent *event)
	This event handler can be reimplemented in a subclass to receive custom events.

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	disconnectNotify (const QMetaMethod &signal)

	QObject (QObjectPrivate &dd, QObject *parent=nullptr)

Properties
int	cursorWidth

qreal	idealWidth

bool	contentHasAlignment

Properties inherited from QObject
QString	objectName
	the name of this object

Additional Inherited Members
Public Slots inherited from QObject
void	deleteLater ()
	\threadsafe

Signals inherited from QAbstractTextDocumentLayout
void	update (const QRectF &=QRectF(0., 0., 1000000000., 1000000000.))
	This signal is emitted when the rectangle rect has been updated.

void	updateBlock (const QTextBlock &block)

void	documentSizeChanged (const QSizeF &newSize)
	This signal is emitted when the size of the document layout changes to newSize.

void	pageCountChanged (int newPages)
	This signal is emitted when the number of pages in the layout changes; newPages is the updated page count.

Signals inherited from QObject
void	destroyed (QObject *=nullptr)
	This signal is emitted immediately before the object obj is destroyed, after any instances of QPointer have been notified, and cannot be blocked.

void	objectNameChanged (const QString &objectName, QPrivateSignal)
	This signal is emitted after the object's name has been changed.

Static Public Member Functions inherited from QObject
static QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char member, Qt::ConnectionType=Qt::AutoConnection)
	\threadsafe

static QMetaObject::Connection	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)

template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::ContextTypeForFunctor< Func2 >::ContextType context, Func2 &&slot, Qt::ConnectionType type=Qt::AutoConnection)

template<typename Func1 , typename Func2 >
static QMetaObject::Connection	connect (const typename QtPrivate::FunctionPointer< Func1 >::Object *sender, Func1 signal, Func2 &&slot)

static bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)
	\threadsafe

static bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &member)

static bool	disconnect (const QMetaObject::Connection &)
	Disconnect a connection.

template<typename Func1 , typename Func2 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const typename QtPrivate::FunctionPointer< Func2 >::Object receiver, Func2 slot)

template<typename Func1 >
static bool	disconnect (const typename QtPrivate::FunctionPointer< Func1 >::Object sender, Func1 signal, const QObject receiver, void **zero)

Protected Attributes inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Related Symbols inherited from QObject
template< class T > T	qobject_cast (const QObject *object)
	Returns the given object cast to type T if the object is of type T (or of a subclass); otherwise returns \nullptr.

template< typename T > T	qFindChildqFindChildren (const QObject *obj, const QString &name)()

template< typename T > QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()

	QObjectList
	\macro Q_CLASSINFO(Name, Value)

Detailed Description

Definition at line 29 of file qtextdocumentlayout_p.h.

Constructor & Destructor Documentation

◆ QTextDocumentLayout()

QTextDocumentLayout::QTextDocumentLayout ( QTextDocument * doc )

explicit

Definition at line 3698 of file qtextdocumentlayout.cpp.

References QTextFormat::ImageObject, and QAbstractTextDocumentLayout::registerHandler().

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Member Function Documentation

◆ blockBoundingRect()

QRectF QTextDocumentLayout::blockBoundingRect ( const QTextBlock & block ) const

overridevirtual

Returns the bounding rectangle of block.

Implements QAbstractTextDocumentLayout.

Definition at line 4101 of file qtextdocumentlayout.cpp.

References d, frame, QTextBlock::isValid(), QTextTableCell::isValid(), QTextBlock::isVisible(), layout, QTextBlock::layout(), QTextBlock::length(), QTextBlock::position(), and rect.

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◆ contentHasAlignment()

bool QTextDocumentLayout::contentHasAlignment ( ) const

Definition at line 4184 of file qtextdocumentlayout.cpp.

References d.

◆ cursorWidth()

int QTextDocumentLayout::cursorWidth ( ) const

Definition at line 4020 of file qtextdocumentlayout.cpp.

References d.

◆ documentChanged()

void QTextDocumentLayout::documentChanged	(	int	position,
		int	charsRemoved,
		int	charsAdded )

overrideprotectedvirtual

This function is called whenever the contents of the document change.

A change occurs when text is inserted, removed, or a combination of these two. The change is specified by position, charsRemoved, and charsAdded corresponding to the starting character position of the change, the number of characters removed from the document, and the number of characters added.

For example, when inserting the text "Hello" into an empty document, charsRemoved would be 0 and charsAdded would be 5 (the length of the string).

Replacing text is a combination of removing and inserting. For example, if the text "Hello" gets replaced by "Hi", charsRemoved would be 5 and charsAdded would be 2.

For subclasses of QAbstractTextDocumentLayout, this is the central function where a large portion of the work to lay out and position document contents is done.

For example, in a subclass that only arranges blocks of text, an implementation of this function would have to do the following:

\list

Determine the list of changed \l{QTextBlock}(s) using the parameters provided.
Each QTextBlock object's corresponding QTextLayout object needs to be processed. You can access the \l{QTextBlock}'s layout using the QTextBlock::layout() function. This processing should take the document's page size into consideration.
If the total number of pages changed, the pageCountChanged() signal should be emitted.
If the total size changed, the documentSizeChanged() signal should be emitted.
The update() signal should be emitted to schedule a repaint of areas in the layout that require repainting. \endlist

See also: QTextLayout

Implements QAbstractTextDocumentLayout.

Definition at line 3759 of file qtextdocumentlayout.cpp.

References QTextBlock::clearLayout(), d, QAbstractTextDocumentLayout::document(), QAbstractTextDocumentLayout::documentSizeChanged(), dynamicDocumentSize(), emit, QTextDocument::findBlock(), QRectF::isValid(), QTextBlock::next(), qMax(), and QAbstractTextDocumentLayout::update().

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◆ documentSize()

QSizeF QTextDocumentLayout::documentSize ( ) const

overridevirtual

Returns the total size of the document's layout.

This information can be used by display widgets to update their scroll bars correctly.

See also: documentSizeChanged(), QTextDocument::pageSize

Implements QAbstractTextDocumentLayout.

Definition at line 3973 of file qtextdocumentlayout.cpp.

References d, and dynamicDocumentSize().

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◆ draw()

void QTextDocumentLayout::draw	(	QPainter *	painter,
		const PaintContext &	context )

overridevirtual

Draws the layout with the given painter using the given context.

Implements QAbstractTextDocumentLayout.

Definition at line 3705 of file qtextdocumentlayout.cpp.

References QRectF::adjusted(), context, d, frame, QFixed::fromReal(), painter, and qMax().

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◆ drawInlineObject()

void QTextDocumentLayout::drawInlineObject	(	QPainter *	painter,
		const QRectF &	rect,
		QTextInlineObject	object,
		int	posInDocument,
		const QTextFormat &	format )

overrideprotectedvirtual

This function is called to draw the inline object, object, with the given painter within the rectangle specified by rect using the specified text format.

posInDocument specifies the position of the object within the document.

The default implementation calls drawObject() on the object handlers. This function is called only within Qt. Subclasses can reimplement this function to customize the drawing of inline objects.

See also: draw()

Reimplemented from QAbstractTextDocumentLayout.

Definition at line 3937 of file qtextdocumentlayout.cpp.

References d, QAbstractTextDocumentLayout::drawInlineObject(), frame, QTextFrameFormat::InFlow, item, Q_ASSERT, rect, and QTextFormat::toCharFormat().

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◆ dynamicDocumentSize()

QSizeF QTextDocumentLayout::dynamicDocumentSize ( ) const

Definition at line 3960 of file qtextdocumentlayout.cpp.

References d.

Referenced by documentChanged(), documentSize(), dynamicPageCount(), and timerEvent().

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◆ dynamicPageCount()

int QTextDocumentLayout::dynamicPageCount ( ) const

Definition at line 3951 of file qtextdocumentlayout.cpp.

References d, dynamicDocumentSize(), QSizeF::height(), and qCeil().

Referenced by pageCount(), and timerEvent().

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◆ ensureLayouted()

void QTextDocumentLayout::ensureLayouted ( qreal y )

Definition at line 4172 of file qtextdocumentlayout.cpp.

References QFixed::fromReal().

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◆ frameBoundingRect()

QRectF QTextDocumentLayout::frameBoundingRect ( QTextFrame * frame ) const

overridevirtual

Returns the bounding rectangle of frame.

Implements QAbstractTextDocumentLayout.

Definition at line 4072 of file qtextdocumentlayout.cpp.

References d, and frame.

Referenced by QQuickTextNodeEngine::addFrameDecorations().

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◆ hitTest()

int QTextDocumentLayout::hitTest	(	const QPointF &	point,
		Qt::HitTestAccuracy	accuracy ) const

overridevirtual

Returns the cursor position for the given point with the specified accuracy.

Returns -1 if no valid cursor position was found.

Implements QAbstractTextDocumentLayout.

Definition at line 3849 of file qtextdocumentlayout.cpp.

References d, Qt::ExactHit, QFixed::fromReal(), QString::isEmpty(), QTextDocumentLayoutPrivate::PointExact, position(), QTextLayout::preeditAreaText(), QString::size(), QPointF::x(), QFixedPoint::x, and QPointF::y().

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◆ idealWidth()

qreal QTextDocumentLayout::idealWidth ( ) const

Definition at line 4177 of file qtextdocumentlayout.cpp.

References d.

◆ layoutStatus()

int QTextDocumentLayout::layoutStatus ( ) const

Definition at line 4130 of file qtextdocumentlayout.cpp.

References d, QTextDocumentPrivate::get(), and pos.

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◆ pageCount()

int QTextDocumentLayout::pageCount ( ) const

overridevirtual

Returns the number of pages contained in the layout.

See also: pageCountChanged()

Implements QAbstractTextDocumentLayout.

Definition at line 3966 of file qtextdocumentlayout.cpp.

References d, and dynamicPageCount().

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◆ positionInlineObject()

void QTextDocumentLayout::positionInlineObject	(	QTextInlineObject	item,
		int	posInDocument,
		const QTextFormat &	format )

overrideprotectedvirtual

Lays out the inline object item using the given text format.

posInDocument specifies the position of the object within the document.

The default implementation does nothing. This function is called only within Qt. Subclasses can reimplement this function to customize the position of inline objects.

See also: drawInlineObject()

Reimplemented from QAbstractTextDocumentLayout.

Definition at line 3910 of file qtextdocumentlayout.cpp.

References QTextObjectHandler::component, d, QTextBlock::document(), QTextDocument::findBlock(), frame, item, line, Q_ASSERT, Q_UNUSED, and QTextFormat::toCharFormat().

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◆ resizeInlineObject()

void QTextDocumentLayout::resizeInlineObject	(	QTextInlineObject	item,
		int	posInDocument,
		const QTextFormat &	format )

overrideprotectedvirtual

Sets the size of the inline object item corresponding to the text format.

posInDocument specifies the position of the object within the document.

The default implementation resizes the item to the size returned by the object handler's intrinsicSize() function. This function is called only within Qt. Subclasses can reimplement this function to customize the resizing of inline objects.

Reimplemented from QAbstractTextDocumentLayout.

Definition at line 3875 of file qtextdocumentlayout.cpp.

References QTextCharFormat::AlignMiddle, QTextObjectHandler::component, d, frame, QFixedSize::fromSizeF(), QTextObjectHandler::iface, QTextFrameFormat::InFlow, QTextObjectInterface::intrinsicSize(), item, pos, Q_ASSERT, and QTextFormat::toCharFormat().

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◆ setCursorWidth()

void QTextDocumentLayout::setCursorWidth ( int width )

Definition at line 4014 of file qtextdocumentlayout.cpp.

References d.

◆ setFixedColumnWidth()

void QTextDocumentLayout::setFixedColumnWidth ( int width )

Definition at line 4026 of file qtextdocumentlayout.cpp.

References d.

◆ setViewport()

void QTextDocumentLayout::setViewport ( const QRectF & viewport )

Definition at line 3733 of file qtextdocumentlayout.cpp.

References d, and viewport().

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◆ tableBoundingRect()

QRectF QTextDocumentLayout::tableBoundingRect ( QTextTable * table ) const

Definition at line 4045 of file qtextdocumentlayout.cpp.

References d, QTextTableCell::isValid(), and pos.

Referenced by QQuickTextNodeEngine::addFrameDecorations(), and tableCellBoundingRect().

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◆ tableCellBoundingRect()

QRectF QTextDocumentLayout::tableCellBoundingRect	(	QTextTable *	table,
		const QTextTableCell &	cell ) const

Definition at line 4032 of file qtextdocumentlayout.cpp.

References QTextTableData::cellRect(), QTextTableCell::isValid(), tableBoundingRect(), and QRectF::translated().

Referenced by QQuickTextNodeEngine::addFrameDecorations().

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◆ timerEvent()

void QTextDocumentLayout::timerEvent ( QTimerEvent * event )

overrideprotectedvirtual

This event handler can be reimplemented in a subclass to receive timer events for the object.

QChronoTimer provides higher-level interfaces to the timer functionality, and also more general information about timers. The timer event is passed in the event parameter.

See also: startTimer(), killTimer(), event()

Reimplemented from QObject.

Definition at line 4139 of file qtextdocumentlayout.cpp.

References d, QAbstractTextDocumentLayout::documentSizeChanged(), dynamicDocumentSize(), dynamicPageCount(), emit, QAbstractTextDocumentLayout::pageCountChanged(), QObject::timerEvent(), and QTimerEvent::timerId().

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Property Documentation

◆ contentHasAlignment

bool QTextDocumentLayout::contentHasAlignment

read

Definition at line 35 of file qtextdocumentlayout_p.h.

◆ cursorWidth

int QTextDocumentLayout::cursorWidth

readwrite

Definition at line 33 of file qtextdocumentlayout_p.h.

◆ idealWidth

qreal QTextDocumentLayout::idealWidth

read

Definition at line 34 of file qtextdocumentlayout_p.h.

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

qtbase/src/gui/text/qtextdocumentlayout_p.h (05fc3aef53348fb58be6308076e000825b704e58)
qtbase/src/gui/text/qtextdocumentlayout.cpp (7f48c79627663f0777df9c10d06202aea5bedac3)

Public Member Functions

Protected Member Functions

Properties

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QTextDocumentLayout()

Member Function Documentation

◆ blockBoundingRect()

◆ contentHasAlignment()

◆ cursorWidth()

◆ documentChanged()

◆ documentSize()

◆ draw()

◆ drawInlineObject()

◆ dynamicDocumentSize()

◆ dynamicPageCount()

◆ ensureLayouted()

◆ frameBoundingRect()

◆ hitTest()

◆ idealWidth()

◆ layoutStatus()

◆ pageCount()

◆ positionInlineObject()

◆ resizeInlineObject()

◆ setCursorWidth()

◆ setFixedColumnWidth()

◆ setViewport()

◆ tableBoundingRect()

◆ tableCellBoundingRect()

◆ timerEvent()

Property Documentation

◆ contentHasAlignment

◆ cursorWidth

◆ idealWidth