QWinMime 类

QWinMime class maps open-standard MIME to Window Clipboard formats. 更多...

头：	#include <QWinMime>
qmake:	QT += winextras
Since:	Qt 5.4

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公共函数

	QWinMime ()
virtual	~QWinMime ()
virtual bool	canConvertFromMime (const FORMATETC & formatetc , const QMimeData * mimeData ) const = 0
virtual bool	canConvertToMime (const QString & mimeType , IDataObject * pDataObj ) const = 0
virtual bool	convertFromMime (const FORMATETC & formatetc , const QMimeData * mimeData , STGMEDIUM * pmedium ) const = 0
virtual QVariant	convertToMime (const QString & mimeType , IDataObject * pDataObj , QVariant::Type preferredType ) const = 0
virtual QVector<FORMATETC>	formatsForMime (const QString & mimeType , const QMimeData * mimeData ) const = 0
virtual QString	mimeForFormat (const FORMATETC & formatetc ) const = 0

静态公共成员

int	registerMimeType (const QString & mime )

详细描述

QWinMime class maps open-standard MIME to Window Clipboard formats.

Qt's drag-and-drop and clipboard facilities use the MIME standard. On X11, this maps trivially to the Xdnd protocol, but on Windows although some applications use MIME types to describe clipboard formats, others use arbitrary non-standardized naming conventions, or unnamed built-in formats of Windows.

By instantiating subclasses of QWinMime that provide conversions between Windows Clipboard and MIME formats, you can convert proprietary clipboard formats to MIME formats.

Qt has predefined support for the following Windows Clipboard formats:

Windows 格式	等效 MIME 类型
`CF_UNICODETEXT`	`text/plain`
`CF_TEXT`	`text/plain`
`CF_DIB`	`image/xyz` ，其中 `xyz` 是 Qt image format
`CF_HDROP`	`text/uri-list`
`CF_INETURL`	`text/uri-list`
`CF_HTML`	`text/html`

An example use of this class would be to map the Windows Metafile clipboard format ( CF_METAFILEPICT ) to and from the MIME type image/x-wmf . This conversion might simply be adding or removing a header, or even just passing on the data. See 拖放 for more information on choosing and definition MIME types.

You can check if a MIME type is convertible using canConvertFromMime () and can perform conversions with convertToMime () 和 convertFromMime ().

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QWinMime:: QWinMime ()

Constructs a new conversion object, adding it to the globally accessed list of available converters.

`[virtual]` QWinMime:: ~QWinMime ()

Destroys a conversion object, removing it from the global list of available converters.

`[pure virtual]` bool QWinMime:: canConvertFromMime (const FORMATETC & formatetc , const QMimeData * mimeData ) const

Returns true if the converter can convert from the mimeData to the format specified in formatetc .