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詳細描述

QTextDocumentWriter 類

The QTextDocumentWriter class provides a format-independent interface for writing a QTextDocument 到文件或其它設備。更多...

頭：	#include <QTextDocumentWriter>
qmake:	QT += gui
Since:	Qt 4.5

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	QTextDocumentWriter ()
	QTextDocumentWriter (QIODevice * device , const QByteArray & format )
	QTextDocumentWriter (const QString & fileName , const QByteArray & format = QByteArray())
	~QTextDocumentWriter ()
QTextCodec *	codec () const
QIODevice *	device () const
QString	fileName () const
QByteArray	format () const
void	setCodec (QTextCodec * codec )
void	setDevice (QIODevice * device )
void	setFileName (const QString & fileName )
void	setFormat (const QByteArray & format )
bool	write (const QTextDocument * document )
bool	write (const QTextDocumentFragment & fragment )

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QList<QByteArray>

supportedDocumentFormats ()

詳細描述

The QTextDocumentWriter class provides a format-independent interface for writing a QTextDocument 到文件或其它設備。

To write a document, construct a QTextDocumentWriter object with either a file name or a device object, and specify the document format to be written. You can construct a writer and set the format using setFormat () later.

調用 write () to write the document to the device. If the document is successfully written, this function returns true . However, if an error occurs when writing the document, it will return false.

調用 supportedDocumentFormats () for a list of formats that QTextDocumentWriter can write.

Since the capabilities of the supported output formats vary considerably, the writer simply outputs the appropriate subset of objects for each format. This typically includes the formatted text and images contained in a document.

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QTextDocumentWriter:: QTextDocumentWriter ()

構造空的 QTextDocumentWriter object. Before writing, you must call setFormat () to set a document format, then setDevice () 或 setFileName ().

QTextDocumentWriter:: QTextDocumentWriter ( QIODevice * device , const QByteArray & format )

構造 QTextDocumentWriter object to write to the given device in the document format specified by format .

QTextDocumentWriter:: QTextDocumentWriter (const QString & fileName , const QByteArray & format = QByteArray())

Constructs an QTextDocumentWriter object that will write to a file with the name fileName , using the document format specified by format 。若 format is not provided, QTextDocumentWriter will detect the document format by inspecting the extension of fileName .

QTextDocumentWriter:: ~QTextDocumentWriter ()

銷毀 QTextDocumentWriter 對象。

QTextCodec *QTextDocumentWriter:: codec () const

Returns the codec that is currently assigned to the writer.

另請參閱 setCodec ().

QIODevice *QTextDocumentWriter:: device () const

Returns the device currently assigned, or 0 if no device has been assigned.

另請參閱 setDevice ().

QString QTextDocumentWriter:: fileName () const

若目前賦值設備是 QFile ，或者若 setFileName () has been called, this function returns the name of the file to be written to. In all other cases, it returns an empty string.

另請參閱 setFileName () 和 setDevice ().

QByteArray QTextDocumentWriter:: format () const

返迴用於寫文檔的格式。

另請參閱 setFormat ().

void QTextDocumentWriter:: setCodec ( QTextCodec * codec )

Sets the codec for this stream to codec . The codec is used for encoding any data that is written. By default, QTextDocumentWriter uses UTF-8.

另請參閱 codec ().

void QTextDocumentWriter:: setDevice ( QIODevice * device )

Sets the writer's device to the device specified. If a device has already been set, the old device is removed but otherwise left unchanged.

若設備尚未打開， QTextDocumentWriter will attempt to open the device in QIODevice::WriteOnly mode by calling open().

注意： This will not work for certain devices, such as QProcess , QTcpSocket and QUdpSocket , where some configuration is required before the device can be opened.

另請參閱 device () 和 setFileName ().

void QTextDocumentWriter:: setFileName (const QString & fileName )

Sets the name of the file to be written to fileName . Internally, QTextDocumentWriter 將創建 QFile and open it in QIODevice::WriteOnly mode, and use this file when writing the document.

另請參閱 fileName () 和 setDevice ().

void QTextDocumentWriter:: setFormat (const QByteArray & format )

Sets the format used to write documents to the format 指定。 format is a case insensitive text string. For example:

        QTextDocumentWriter writer;
        writer.setFormat("odf"); // same as writer.setFormat("ODF");

可以調用 supportedDocumentFormats () 瞭解完整格式列錶 QTextDocumentWriter 支持。

另請參閱 format ().

`[static]` QList < QByteArray > QTextDocumentWriter:: supportedDocumentFormats ()

返迴文檔格式列錶支持通過 QTextDocumentWriter .

默認情況下，Qt 可以寫入下列格式：

格式	描述
plaintext	純文本
HTML	HTML (超文本標記語言)
ODF	ODF (開放文檔格式)