The QTextDocument class holds formatted text that can be viewed and edited using a QTextEdit. More...

Inheritance diagram for QTextDocument:

Public Types
enum	MetaInformation

enum	ResourceType

enum	Stacks

Public Signals
void	baseUrlChanged (const QUrl &url)

void	blockCountChanged (int newBlockCount)

void	contentsChange (int position, int charsRemoved, int charsAdded)

void	contentsChanged ()

void	cursorPositionChanged (const QTextCursor &cursor)

void	documentLayoutChanged ()

void	modificationChanged (bool status)

void	redoAvailable (bool status)

void	undoAvailable (bool status)

void	undoCommandAdded ()

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

void	objectNameChanged (const QString &objectName)

Public Slots
void	redo ()

void	setModified (bool status=true)

void	undo ()

Public Slots inherited from QObject
void	deleteLater ()

Public Methods
	QTextDocument (const QString &text, QObject *parent=nullptr)

	QTextDocument (QObject *parent=nullptr)

	~QTextDocument ()

void	addResource (int type, const QUrl &name, const QVariant &resource)

void	adjustSize ()

QVector< QTextFormat >	allFormats () const

int	availableRedoSteps () const

int	availableUndoSteps () const

QUrl	baseUrl () const

QTextBlock	begin () const

int	blockCount () const

QChar	characterAt (int pos) const

int	characterCount () const

virtual void	clear ()

void	clearUndoRedoStacks (Stacks selection=UndoAndRedoStacks)

QTextDocument *	clone (QObject *parent=nullptr) const

Qt::CursorMoveStyle	defaultCursorMoveStyle () const

QFont	defaultFont () const

QString	defaultStyleSheet () const

QTextOption	defaultTextOption () const

QAbstractTextDocumentLayout *	documentLayout () const

qreal	documentMargin () const

void	drawContents (QPainter *painter, const QRectF &rect=QRectF ())

QTextBlock	end () const

QTextCursor	find (const QRegularExpression &expr, const QTextCursor &cursor, FindFlags options=FindFlags ()) const

QTextCursor	find (const QRegularExpression &expr, int position=0, FindFlags options=FindFlags ()) const

QTextCursor	find (const QString &subString, const QTextCursor &cursor, FindFlags options=FindFlags ()) const

QTextCursor	find (const QString &subString, int position=0, FindFlags options=FindFlags ()) const

QTextBlock	findBlock (int pos) const

QTextBlock	findBlockByLineNumber (int blockNumber) const

QTextBlock	findBlockByNumber (int blockNumber) const

QTextBlock	firstBlock () const

qreal	idealWidth () const

qreal	indentWidth () const

bool	isEmpty () const

bool	isModified () const

bool	isRedoAvailable () const

bool	isUndoAvailable () const

bool	isUndoRedoEnabled () const

QTextBlock	lastBlock () const

int	lineCount () const

void	markContentsDirty (int position, int length)

int	maximumBlockCount () const

QString	metaInformation (MetaInformation info) const

QTextObject *	object (int objectIndex) const

QTextObject *	objectForFormat (const QTextFormat &format) const

int	pageCount () const

QSizeF	pageSize () const

void	print (QPagedPaintDevice *printer) const

void	redo (QTextCursor *cursor)

QVariant	resource (int type, const QUrl &name) const

int	revision () const

QTextFrame *	rootFrame () const

void	setBaseUrl (const QUrl &url)

void	setDefaultCursorMoveStyle (Qt::CursorMoveStyle style)

void	setDefaultFont (const QFont &font)

void	setDefaultStyleSheet (const QString &sheet)

void	setDefaultTextOption (const QTextOption &option)

void	setDocumentLayout (QAbstractTextDocumentLayout *layout)

void	setDocumentMargin (qreal margin)

void	setHtml (const QString &html)

void	setIndentWidth (qreal width)

void	setMaximumBlockCount (int maximum)

void	setMetaInformation (MetaInformation info, const QString &text)

void	setPageSize (const QSizeF &size)

void	setPlainText (const QString &text)

void	setTextWidth (qreal width)

void	setUndoRedoEnabled (bool enabled)

void	setUseDesignMetrics (bool enabled)

QSizeF	size () const

qreal	textWidth () const

QString	toHtml (const QString &encoding=QString ()) const

QString	toPlainText () const

void	undo (QTextCursor *cursor)

bool	useDesignMetrics () 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

Protected Methods
virtual QTextObject *	createObject (const QTextFormat &format)

virtual QVariant	loadResource (int type, const QUrl &name)

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)

Properties
	blockCount

	defaultFont

	defaultStyleSheet

	defaultTextOption

	documentMargin

	indentWidth

	maximumBlockCount

	modified

	pageSize

	size

	textWidth

	undoRedoEnabled

	useDesignMetrics

Properties inherited from QObject
	objectName

Additional Inherited Members
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 >())

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

	QObjectList

Detailed Description

The QTextDocument class holds formatted text that can be viewed and edited using a QTextEdit.QTextDocument is a container for structured rich text documents, providing support for styled text and various types of document elements, such as lists, tables, frames, and images. They can be created for use in a QTextEdit, or used independently.

Each document element is described by an associated format object. Each format object is treated as a unique object by QTextDocuments, and can be passed to objectForFormat() to obtain the document element that it is applied to.

A QTextDocument can be edited programmatically using a QTextCursor, and its contents can be examined by traversing the document structure. The entire document structure is stored as a hierarchy of document elements beneath the root frame, found with the rootFrame() function. Alternatively, if you just want to iterate over the textual contents of the document you can use begin(), end(), and findBlock() to retrieve text blocks that you can examine and iterate over.

The layout of a document is determined by the documentLayout(). You can create your own QAbstractTextDocumentLayout subclass and set it using setDocumentLayout() if you want to use your own layout logic. The document's title and other meta information can be obtained by calling the metaInformation() function. For documents that are exposed to users through the QTextEdit class, the document title is also available via the QTextEdit::documentTitle() function.

The toPlainText() and toHtml() convenience functions allow you to retrieve the contents of the document as plain text and HTML. The document's text can be searched using the find() functions.

Undo/redo of operations performed on the document can be controlled using the setUndoRedoEnabled() function. The undo/redo system can be controlled by an editor widget through the undo() and redo() slots; the document also provides contentsChanged(), undoAvailable(), and redoAvailable() signals that inform connected editor widgets about the state of the undo/redo system. The following are the undo/redo operations of a QTextDocument:

Insertion or removal of characters. A sequence of insertions or removals within the same text block are regarded as a single undo/redo operation.
Insertion or removal of text blocks. Sequences of insertion or removals in a single operation (e.g., by selecting and then deleting text) are regarded as a single undo/redo operation.
Text character format changes.
Text block format changes.
Text block group format changes.

See also: QTextCursor, QTextEdit

Member Enumeration Documentation

enum QTextDocument::MetaInformation

This enum describes the different types of meta information that can be added to a document.

Constant	Value	Description
`QTextDocument::DocumentTitle`	`0`	The title of the document.
`QTextDocument::DocumentUrl`	`1`	The url of the document. The loadResource() function uses this url as the base when loading relative resources.

See also: metaInformation(), setMetaInformation()

enum QTextDocument::ResourceType

This enum describes the types of resources that can be loaded by QTextDocument's loadResource() function.

Constant	Value	Description
`QTextDocument::HtmlResource`	`1`	The resource contains HTML.
`QTextDocument::ImageResource`	`2`	The resource contains image data. Currently supported data types are QVariant::Pixmap and QVariant::Image. If the corresponding variant is of type QVariant::ByteArray then CopperSpice attempts to load the image using QImage::loadFromData. QVariant::Icon is currently not supported. The icon needs to be converted to one of the supported types first, for example using QIcon::pixmap.
`QTextDocument::StyleSheetResource`	`3`	The resource contains CSS.
`QTextDocument::UserResource`	`100`	The first available value for user defined resource types.

See also: loadResource()

enum QTextDocument::Stacks

Constant	Value	Description
`QTextDocument::UndoStack`	`0x01`	The undo stack.
`QTextDocument::RedoStack`	`0x02`	The redo stack.
`QTextDocument::UndoAndRedoStacks`	`UndoStack \| RedoStack`	Both the undo and redo stacks.

Constructor & Destructor Documentation

QTextDocument::QTextDocument ( QObject * parent = nullptr )

explicit

Constructs an empty QTextDocument with the given parent.

QTextDocument::QTextDocument	(	const QString &	text,
		QObject *	parent = `nullptr`
	)

explicit

Constructs a QTextDocument containing the plain (unformatted) text specified, and with the given parent.

QTextDocument::~QTextDocument ( )

Destroys this document object.

Method Documentation

void QTextDocument::addResource	(	int	type,
		const QUrl &	name,
		const QVariant &	resource
	)

Adds the resource to the resource cache, using type and name as identifiers. The type should be a value from QTextDocument::ResourceType. The following example shows how to add an image as a resource in order to reference it from within the document.

document->addResource(QTextDocument::ImageResource, QUrl("mydata://image.png"), QVariant(image));

The image can be inserted into the document using the QTextCursor API:

QTextImageFormat imageFormat;
imageFormat.setName("mydata://image.png");
cursor.insertImage(imageFormat);

Alternatively, you can insert images using the HTML img tag:

editor->append("<img src=\"mydata://image.png\" />");

void QTextDocument::adjustSize ( )

Adjusts the document to a reasonable size.

See also: idealWidth(), textWidth, size

QVector< QTextFormat > QTextDocument::allFormats ( ) const

Returns a vector of text formats for all the formats used in the document.

int QTextDocument::availableRedoSteps ( ) const

Returns the number of available redo steps.

See also: isRedoAvailable()

int QTextDocument::availableUndoSteps ( ) const

Returns the number of available undo steps.

See also: isUndoAvailable()

QUrl QTextDocument::baseUrl ( ) const

Returns the value of the property.

void QTextDocument::baseUrlChanged ( const QUrl & url )

signal

Sets the value of the property to url.

QTextBlock QTextDocument::begin ( ) const

Returns the document's first text block.

See also: firstBlock()

int QTextDocument::blockCount ( ) const

Returns the value of the property.

void QTextDocument::blockCountChanged ( int newBlockCount )

signal

This signal is emitted when the total number of text blocks in the document changes. The value passed in newBlockCount is the new total.

QChar QTextDocument::characterAt ( int pos ) const

Returns the character at position pos or a null character if the position is out of range.

See also: characterCount()

int QTextDocument::characterCount ( ) const

Returns the number of characters of this document.

See also: blockCount(), characterAt()

void QTextDocument::clear ( )

virtual

Clears the contents of this document.

void QTextDocument::clearUndoRedoStacks ( Stacks selection = UndoAndRedoStacks )

Clears the stacks specified by selection. This method clears any commands on the undo stack, the redo stack, or both (the default). If commands are cleared, the appropriate signals are emitted, QTextDocument::undoAvailable() or QTextDocument::redoAvailable().

See also: QTextDocument::undoAvailable(), QTextDocument::redoAvailable()

QTextDocument * QTextDocument::clone ( QObject * parent = nullptr ) const

Creates a new QTextDocument that is a copy of this text document. The parent is the parent of the returned text document.

void QTextDocument::contentsChange	(	int	position,
		int	charsRemoved,
		int	charsAdded
	)

signal

This signal is emitted whenever the document content is changed. For example when text is inserted or deleted or when formatting is applied. Information is provided about the position of the character in the document where the change occurred, the number of characters removed (charsRemoved), and the number of characters added (charsAdded).

The signal is emitted before the document's layout manager is notified about the change. This hook allows you to implement syntax highlighting for the document.

See also: QAbstractTextDocumentLayout::documentChanged(), contentsChanged()

void QTextDocument::contentsChanged ( )

signal

This signal is emitted whenever the document's content changes. For example, when text is inserted or deleted, or when formatting is applied.

See also: contentsChange()

QTextObject * QTextDocument::createObject ( const QTextFormat & format )

protectedvirtual

Creates and returns a new document object based on the given format.

QTextObjects will always be created by this method so you must override it to use custom text objects inside your document.

void QTextDocument::cursorPositionChanged ( const QTextCursor & cursor )

signal

This signal is emitted whenever the position of a cursor changed due to an editing operation. The cursor that changed is passed in cursor. If you need a signal when the cursor is moved with the arrow keys you can use the cursorPositionChanged() signal in QTextEdit.

Qt::CursorMoveStyle QTextDocument::defaultCursorMoveStyle ( ) const

The default cursor movement style is used by all QTextCursor objects created from the document. The default is Qt::LogicalMoveStyle.

See also: setDefaultCursorMoveStyle()

QFont QTextDocument::defaultFont ( ) const

Returns the value of the property.

QString QTextDocument::defaultStyleSheet ( ) const

Returns the value of the property.

QTextOption QTextDocument::defaultTextOption ( ) const

Returns the value of the property.

QAbstractTextDocumentLayout * QTextDocument::documentLayout ( ) const

Returns the document layout for this document.

See also: setDocumentLayout()

void QTextDocument::documentLayoutChanged ( )

signal

This signal is emitted when a new document layout is set.

See also: setDocumentLayout()

qreal QTextDocument::documentMargin ( ) const

Returns the value of the property.

void QTextDocument::drawContents	(	QPainter *	painter,
		const QRectF &	rect = `QRectF()`
	)

Draws the content of the document with painter clipped to rect. If rect is a null rectangle (default) then the document is painted unclipped.

QTextBlock QTextDocument::end ( ) const

This method returns a block to test for the end of the document while iterating over it.

for (QTextBlock it = doc->begin(); it != doc->end(); it = it.next()) {
   cout << it.text().toStdString() << endl;
}

The block returned is invalid and represents the block after the last block in the document. You can use lastBlock() to retrieve the last valid block of the document.

See also: lastBlock()

QTextCursor QTextDocument::find	(	const QRegularExpression &	expr,
		const QTextCursor &	cursor,
		FindFlags	options = `FindFlags()`
	)		const

Finds the next occurrence matching the regular expression expr in the document. The search starts at the position of the given cursor and proceeds forwards through the document unless specified otherwise in the search options. The options control the type of search performed.

Returns a cursor with the match selected if a match was found, otherwise returns a null cursor. If the given cursor has a selection, the search begins after the selection, otherwise it begins at the cursor's position.

The FindCaseSensitively option is ignored for this overload, use QPatternOption::CaseInsensitiveOption instead. By default the search is case-sensitive and can match text anywhere in the document.

QTextCursor QTextDocument::find	(	const QRegularExpression &	expr,
		int	position = `0`,
		FindFlags	options = `FindFlags()`
	)		const

Finds the next occurrence, matching the regular expression, expr, in the document. The search starts at the given position, and proceeds forwards through the document unless specified otherwise in the search options. The options control the type of search performed.

Returns a cursor with the match selected if a match was found, otherwise returns a null cursor. If the position is 0 the search begins from the beginning of the document, otherwise it begins at the specified position.

The FindCaseSensitively option is ignored for this overload, use QPatternOption::CaseInsensitiveOption instead. By default the search is case-sensitive and can match text anywhere in the document.

QTextCursor QTextDocument::find	(	const QString &	subString,
		const QTextCursor &	cursor,
		FindFlags	options = `FindFlags()`
	)		const

Finds the next occurrence of the string subString in the document. The search starts at the position of the given cursor, and proceeds forwards through the document unless specified otherwise in the search options. The options control the type of search performed.

Returns a cursor with the match selected if subString was found, otherwise returns a null cursor.

If the given cursor has a selection the search begins after the selection otherwise it begins at the cursor's position. By default the search is case-sensitive and can match text anywhere in the document.

QTextCursor QTextDocument::find	(	const QString &	subString,
		int	position = `0`,
		FindFlags	options = `FindFlags()`
	)		const

Finds the next occurrence of the string, subString, in the document. The search starts at the given position, and proceeds forwards through the document unless specified otherwise in the search options. The options control the type of search performed.

Returns a cursor with the match selected if subString was found, otherwise returns a null cursor. If the position is 0 the search begins from the beginning of the document otherwise it begins at the specified position.

QTextBlock QTextDocument::findBlock ( int pos ) const

Returns the text block that contains the character at position pos.

QTextBlock QTextDocument::findBlockByLineNumber ( int blockNumber ) const

Returns the text block that contains the specified blockNumber.

See also: QTextBlock::firstLineNumber()

QTextBlock QTextDocument::findBlockByNumber ( int blockNumber ) const

Returns the text block with the specified blockNumber.

See also: QTextBlock::blockNumber()

QTextBlock QTextDocument::firstBlock ( ) const

Returns the document's first text block.

qreal QTextDocument::idealWidth ( ) const

Returns the ideal width of the text document. The ideal width is the actually used width of the document without optional alignments taken into account. It is always <= size().width().

See also: adjustSize(), textWidth

qreal QTextDocument::indentWidth ( ) const

Returns the value of the property.

bool QTextDocument::isEmpty ( ) const

Returns true if the document is empty, otherwise returns false.

bool QTextDocument::isModified ( ) const

Returns the value of the property.

bool QTextDocument::isRedoAvailable ( ) const

Returns true if redo is available, otherwise returns false.

See also: isUndoAvailable(), availableRedoSteps()

bool QTextDocument::isUndoAvailable ( ) const

Returns true if undo is available, otherwise returns false.

See also: isRedoAvailable(), availableUndoSteps()

bool QTextDocument::isUndoRedoEnabled ( ) const

Returns the value of the property.

QTextBlock QTextDocument::lastBlock ( ) const

Returns the document's last (valid) text block.

int QTextDocument::lineCount ( ) const

Returns the number of lines of this document (if the layout supports this). Otherwise, this is identical to the number of blocks.

See also: blockCount(), characterCount()

QVariant QTextDocument::loadResource	(	int	type,
		const QUrl &	name
	)

protectedvirtual

Loads data of the specified type from the resource with the given name.

This function is called by the rich text engine to request data that is not directly stored by QTextDocument, but still associated with it. For example, images are referenced indirectly by the name attribute of a QTextImageFormat object.

When called by CopperSpice type is one of the values of QTextDocument::ResourceType.

If the QTextDocument is a child object of a QTextEdit, QTextBrowser, or a QTextDocument itself then the default implementation tries to retrieve the data from the parent.

void QTextDocument::markContentsDirty	(	int	position,
		int	length
	)

Marks the contents specified by the given position and length as "dirty", informing the document that it needs to be laid out again.

int QTextDocument::maximumBlockCount ( ) const

Returns the value of the property.

QString QTextDocument::metaInformation ( MetaInformation info ) const

Returns meta information about the document of the type specified by info.

See also: setMetaInformation()

void QTextDocument::modificationChanged ( bool status )

signal

This signal is emitted whenever the content of the document changes in a way that affects the modification state. If status is true, the document has been modified, otherwise it is false.

For example, calling setModified(false) on a document and then inserting text causes the signal to get emitted. If you undo that operation, causing the document to return to its original unmodified state, the signal will get emitted again.

QTextObject * QTextDocument::object ( int objectIndex ) const

Returns the text object associated with the given objectIndex.

QTextObject * QTextDocument::objectForFormat ( const QTextFormat & format ) const

Returns the text object associated with the given format.

int QTextDocument::pageCount ( ) const

Returns the number of pages in this document.

QSizeF QTextDocument::pageSize ( ) const

Returns the value of the property.

void QTextDocument::print ( QPagedPaintDevice * printer ) const

Prints the document to the given printer. The QPrinter must be set up before being used with this method.

This is convenience method to print the whole document to the printer. If the document is already paginated through a specified height in the pageSize() property it is printed as-is.

If the document is not paginated, like for example a document used in a QTextEdit, then a temporary copy of the document is created and the copy is broken into multiple pages according to the size of the QPrinter's paperRect(). By default a 2 cm margin is set around the document contents. In addition the current page number is printed at the bottom of each page.

Note that QPrinter::Selection is not supported as print range with this function since the selection is a property of QTextCursor. If you have a QTextEdit associated with your QTextDocument then you can use QTextEdit's print() function because QTextEdit has access to the user's selection.

See also: QTextEdit::print()

void QTextDocument::redo ( )

slot

Redoes the last editing operation on the document if redo is available.

void QTextDocument::redo ( QTextCursor * cursor )

Redoes the last editing operation on the document if redo is available. The provided cursor is positioned at the end of the location where the edition operation was redone.

void QTextDocument::redoAvailable ( bool status )

signal

This signal is emitted whenever the status of an reundo operation changes from available (true) to unavailable (false) or unavailable to available.

QVariant QTextDocument::resource	(	int	type,
		const QUrl &	name
	)		const

Returns data of the specified type from the resource with the given name.

This method is called by the rich text engine to request data that is not directly stored by QTextDocument, but still associated with it. For example, images are referenced indirectly by the name attribute of a QTextImageFormat object.

Resources are cached internally in the document. If a resource can not be found in the cache, loadResource is called to try to load the resource. loadResource should then use addResource to add the resource to the cache.

See also: QTextDocument::ResourceType

int QTextDocument::revision ( ) const

Returns the document's revision (if undo is enabled). The revision is guaranteed to increase when a document that is not modified is edited.

See also: QTextBlock::revision(), isModified()

QTextFrame * QTextDocument::rootFrame ( ) const

Returns the document's root frame.

void QTextDocument::setBaseUrl ( const QUrl & url )

Sets the value of the property to url.

void QTextDocument::setDefaultCursorMoveStyle ( Qt::CursorMoveStyle style )

Sets the default cursor movement style to the given style.

See also: defaultCursorMoveStyle()

void QTextDocument::setDefaultFont ( const QFont & font )

Sets the defaultFont property to the given font.

See also: defaultFont()

void QTextDocument::setDefaultStyleSheet ( const QString & sheet )

Sets the defaultStyleSheet property to the given sheet.

void QTextDocument::setDefaultTextOption ( const QTextOption & option )

Sets the defaultDefaultTextOption property to the given option.

void QTextDocument::setDocumentLayout ( QAbstractTextDocumentLayout * layout )

Sets the document to use the given layout. The previous layout is deleted.

See also: documentLayoutChanged()

void QTextDocument::setDocumentMargin ( qreal margin )

Sets the value of the property to margin.

void QTextDocument::setHtml ( const QString & html )

Replaces the entire contents of the document with the given HTML-formatted text in the html string.

The HTML formatting is respected as much as possible; for example, "<b>bold</b> text" will produce text where the first word has a font weight that gives it a bold appearance: "bold text".

Note: It is the responsibility of the caller to make sure that the text is correctly decoded when a QString containing HTML is created and passed to setHtml().

See also: setPlainText(), Supported HTML Subset

void QTextDocument::setIndentWidth ( qreal width )

Sets the value of the property to width.

void QTextDocument::setMaximumBlockCount ( int maximum )

Sets the value of the property to maximum.

void QTextDocument::setMetaInformation	(	MetaInformation	info,
		const QString &	text
	)

Sets the document's meta information of the type specified by info to the given text.

See also: metaInformation()

void QTextDocument::setModified ( bool status = true )

slot

Sets the value of the property to status.

void QTextDocument::setPageSize ( const QSizeF & size )

Sets the value of the property to size.

void QTextDocument::setPlainText ( const QString & text )

Replaces the entire contents of the document with the given plain text.

See also: setHtml()

void QTextDocument::setTextWidth ( qreal width )

Sets the value of the property to width.

void QTextDocument::setUndoRedoEnabled ( bool enabled )

Sets the value of the property to enabled.

void QTextDocument::setUseDesignMetrics ( bool enabled )

Sets the value of the property to enabled.

QSizeF QTextDocument::size ( ) const

Returns the value of the property.

qreal QTextDocument::textWidth ( ) const

Returns the value of the property.

QString QTextDocument::toHtml ( const QString & encoding = QString() ) const

Returns a string containing an HTML representation of the document. The encoding parameter specifies the value for the charset attribute in the html header. For example if 'utf-8' is specified then the beginning of the generated html will look like the following.

<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body>...

If no encoding is specified then no such meta information is generated. If you later on convert the returned html string into a byte array for transmission over a network or when saving to disk you should specify the encoding you are going to use for the conversion to a byte array here.

See also: Supported HTML Subset

QString QTextDocument::toPlainText ( ) const

Returns the plain text contained in the document. If you want formatting information use a QTextCursor instead.

See also: toHtml()

void QTextDocument::undo ( )

slot

Undoes the last editing operation on the document if undo is available. The provided cursor is positioned at the end of the location where the edition operation was undone.

Refer to the Undo System documentation for details.

See also: undoAvailable(), isUndoRedoEnabled()

void QTextDocument::undo ( QTextCursor * cursor )

Undoes the last editing operation on the document if undo is available. The provided cursor is positioned at the end of the location where the edition operation was undone.

Refer to the Undo System documentation for details.

See also: undoAvailable(), isUndoRedoEnabled()

void QTextDocument::undoAvailable ( bool status )

signal

This signal is emitted whenever the status of an undo operation changes from available (true) to unavailable (false) or unavailable to available.

Refer to the Undo System documentation for details.

See also: undo(), isUndoRedoEnabled()

void QTextDocument::undoCommandAdded ( )

signal

This signal is emitted every time a new level of undo is added to the QTextDocument.

bool QTextDocument::useDesignMetrics ( ) const

Returns the value of the property.

Property Documentation

QTextDocument::blockCount

Returns the number of text blocks in the document. The value of this property is undefined in documents with tables or frames. By default, if defined, this property contains a value of 1.

See also: lineCount(), characterCount()

Properties	Class Methods
read	blockCount

QTextDocument::defaultFont

This property holds the default font used to display the document's text.

Properties	Class Methods
read	defaultFont
write	setDefaultFont

QTextDocument::defaultStyleSheet

The default style sheet is applied to all newly HTML formatted text that is inserted into the document, for example using setHtml() or QTextCursor::insertHtml().

The style sheet needs to be compliant to CSS 2.1 syntax.

Note: Changing the default style sheet does not have any effect to the existing content of the document.

See also: Supported HTML Subset

Properties	Class Methods
read	defaultStyleSheet
write	setDefaultStyleSheet

QTextDocument::defaultTextOption

This property holds the default text option will be set on all QTextLayouts in the document.

When QTextBlocks are created, the defaultTextOption is set on their QTextLayout. This allows setting global properties for the document such as the default word wrap mode.

Properties	Class Methods
read	defaultTextOption
write	setDefaultTextOption

QTextDocument::documentMargin

The margin around the document. The default is 4.

Properties	Class Methods
read	documentMargin
write	setDocumentMargin

QTextDocument::indentWidth

Returns the width used for text list and text block indenting.

The indent properties of QTextListFormat and QTextBlockFormat specify multiples of this value. The default indent width is 40.

Properties	Class Methods
read	indentWidth
write	setIndentWidth

QTextDocument::maximumBlockCount

This property specifies the limit for blocks in the document.

Specifies the maximum number of blocks the document may have. If there are more blocks in the document that specified with this property blocks are removed from the beginning of the document. A negative or zero value specifies that the document may contain an unlimited amount of blocks. The default value is 0.

Note that setting this property will apply the limit immediately to the document contents. Setting this property also disables the undo redo history.

This property is undefined in documents with tables or frames.

Properties	Class Methods
read	maximumBlockCount
write	setMaximumBlockCount

QTextDocument::modified

This property holds whether the document has been modified by the user.

By default this property is false.

See also: modificationChanged()

Properties	Class Methods
read	isModified
write	setModified
designable	true

QTextDocument::pageSize

This property holds the page size that should be used for laying out the document.

By default for a newly-created, empty document, this property contains an undefined size.

See also: modificationChanged()

Properties	Class Methods
read	pageSize
write	setPageSize

QTextDocument::size

Returns the actual size of the document. The size of the document can be changed either by setting a text width or setting an entire page size. The width is always >= pageSize().width().

This property is equivalent to the following code.

documentLayout()->documentSize();

By default for a newly created empty document, this property contains a configuration dependent size.

See also: setTextWidth(), setPageSize(), idealWidth()

Properties	Class Methods
read	size

QTextDocument::textWidth

The text width specifies the preferred width for text in the document. If the text (or content in general) is wider than the specified with it is broken into multiple lines and grows vertically. If the text can not be broken into multiple lines to fit into the specified text width it will be larger and the size() and the idealWidth() property will reflect that.

If the text width is set to -1 then the text will not be broken into multiple lines unless it is enforced through an explicit line break or a new paragraph. The default value is -1.

Setting the text width will also set the page height to -1, causing the document to grow or shrink vertically in a continuous way. If you want the document layout to break the text into multiple pages then you have to set the pageSize property instead.

See also: size(), idealWidth(), pageSize()

Properties	Class Methods
read	textWidth
write	setTextWidth

QTextDocument::undoRedoEnabled

This property holds whether undo/redo are enabled for this document.

The default to true. If disabled, the undo stack is cleared and no items will be added to it.

Properties	Class Methods
read	isUndoRedoEnabled
write	setUndoRedoEnabled

QTextDocument::useDesignMetrics

This property holds whether the document uses design metrics of fonts to improve the accuracy of text layout.

If this property is set to true, the layout will use design metrics. Otherwise, the metrics of the paint device as set on QAbstractTextDocumentLayout::setPaintDevice() will be used.

Using design metrics makes a layout have a width that is no longer dependent on hinting and pixel-rounding. This means that WYSIWYG text layout becomes possible because the width scales much more linearly based on paintdevice metrics than it would otherwise.

By default this property is false.

Properties	Class Methods
read	useDesignMetrics
write	setUseDesignMetrics

Public Types

Public Signals

Public Slots

Public Methods

Protected Methods

Properties

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Method Documentation

Property Documentation