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< td align = "right" valign = "center" > < img src = "logo32.png" align = "right" width = "64" height = "32" border = "0" > < / td > < / tr > < / table > < h1 align = center > TQWindowsMime Class Reference< / h1 >
< p > The TQWindowsMime class maps open-standard MIME to Window Clipboard formats.
< a href = "#details" > More...< / a >
< p > < tt > #include < < a href = "qmime-h.html" > ntqmime.h< / a > > < / tt >
< p > < a href = "qwindowsmime-members.html" > List of all member functions.< / a >
< h2 > Public Members< / h2 >
< ul >
< li class = fn > < a href = "#TQWindowsMime" > < b > TQWindowsMime< / b > < / a > ()< / li >
< li class = fn > virtual < a href = "#~TQWindowsMime" > < b > ~TQWindowsMime< / b > < / a > ()< / li >
< li class = fn > virtual const char * < a href = "#convertorName" > < b > convertorName< / b > < / a > () = 0< / li >
< li class = fn > virtual int < a href = "#countCf" > < b > countCf< / b > < / a > () = 0< / li >
< li class = fn > virtual int < a href = "#cf" > < b > cf< / b > < / a > ( int index ) = 0< / li >
< li class = fn > virtual bool < a href = "#canConvert" > < b > canConvert< / b > < / a > ( const char * mime, int cf ) = 0< / li >
< li class = fn > virtual const char * < a href = "#mimeFor" > < b > mimeFor< / b > < / a > ( int cf ) = 0< / li >
< li class = fn > virtual int < a href = "#cfFor" > < b > cfFor< / b > < / a > ( const char * mime ) = 0< / li >
< li class = fn > virtual TQByteArray < a href = "#convertToMime" > < b > convertToMime< / b > < / a > ( TQByteArray data, const char * mime, int cf ) = 0< / li >
< li class = fn > virtual TQByteArray < a href = "#convertFromMime" > < b > convertFromMime< / b > < / a > ( TQByteArray data, const char * mime, int cf ) = 0< / li >
< / ul >
< h2 > Static Public Members< / h2 >
< ul >
< li class = fn > void < a href = "#initialize" > < b > initialize< / b > < / a > ()< / li >
< li class = fn > TQPtrList< TQWindowsMime> < a href = "#all" > < b > all< / b > < / a > ()< / li >
< li class = fn > TQWindowsMime * < a href = "#convertor" > < b > convertor< / b > < / a > ( const char * mime, int cf )< / li >
< li class = fn > const char * < a href = "#cfToMime" > < b > cfToMime< / b > < / a > ( int cf )< / li >
< / ul >
< hr > < a name = "details" > < / a > < h2 > Detailed Description< / h2 >
The TQWindowsMime class maps open-standard MIME to Window Clipboard formats.
< p > TQt'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.
< p > By instantiating subclasses of TQWindowsMime that provide conversions
between Windows Clipboard and MIME formats, you can convert
proprietary clipboard formats to MIME formats.
< p > TQt has predefined support for the following Windows Clipboard formats:
< ul >
< li > CF_UNICODETEXT - converted to "text/plain;charset=ISO-10646-UCS-2"
and supported by < a href = "qtextdrag.html" > TQTextDrag< / a > .
< li > CF_TEXT - converted to "text/plain;charset=system" or "text/plain"
and supported by TQTextDrag.
< li > CF_DIB - converted to "image/*", where * is
a < a href = "tqimage.html#outputFormats" > TQt image format< / a > ,
and supported by < a href = "tqimagedrag.html" > TQImageDrag< / a > .
< li > CF_HDROP - converted to "text/uri-list",
and supported by < a href = "quridrag.html" > TQUriDrag< / a > .
< / ul >
< p > 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 the
< a href = "dnd.html" > Drag-and-Drop documentation< / a > for more information
on choosing and definition MIME types.
< p > You can check if a MIME type is convertible using < a href = "#canConvert" > canConvert< / a > () and
can perform conversions with < a href = "#convertToMime" > convertToMime< / a > () and < a href = "#convertFromMime" > convertFromMime< / a > ().
< p > See also < a href = "draganddrop.html" > Drag And Drop Classes< / a > , < a href = "io.html" > Input/Output and Networking< / a > , and < a href = "misc.html" > Miscellaneous Classes< / a > .
< hr > < h2 > Member Function Documentation< / h2 >
< h3 class = fn > < a name = "TQWindowsMime" > < / a > TQWindowsMime::TQWindowsMime ()
< / h3 >
Constructs a new conversion object, adding it to the globally accessed
list of available convertors.
< h3 class = fn > < a name = "~TQWindowsMime" > < / a > TQWindowsMime::~TQWindowsMime ()< tt > [virtual]< / tt >
< / h3 >
Destroys a conversion object, removing it from the global
list of available convertors.
< h3 class = fn > < a href = "tqptrlist.html" > TQPtrList< / a > < TQWindowsMime> < a name = "all" > < / a > TQWindowsMime::all ()< tt > [static]< / tt >
< / h3 >
Returns a list of all currently defined TQWindowsMime objects.
< h3 class = fn > bool < a name = "canConvert" > < / a > TQWindowsMime::canConvert ( const char * mime, int cf )< tt > [pure virtual]< / tt >
< / h3 >
< p > Returns TRUE if the convertor can convert (both ways) between
< em > mime< / em > and < em > cf< / em > ; otherwise returns FALSE.
< p > All subclasses must reimplement this pure virtual function.
< h3 class = fn > int < a name = "cf" > < / a > TQWindowsMime::cf ( int index )< tt > [pure virtual]< / tt >
< / h3 >
< p > Returns the Windows Clipboard format supported by this convertor
that is ordinarily at position < em > index< / em > . This means that < a href = "#cf" > cf< / a > (0)
returns the first Windows Clipboard format supported, and
cf(countCf()-1) returns the last. If < em > index< / em > is out of range the
return value is undefined.
< p > All subclasses must reimplement this pure virtual function.
< h3 class = fn > int < a name = "cfFor" > < / a > TQWindowsMime::cfFor ( const char * mime )< tt > [pure virtual]< / tt >
< / h3 >
< p > Returns the Windows Clipboard type used for MIME type < em > mime< / em > , or
0 if this convertor does not support < em > mime< / em > .
< p > All subclasses must reimplement this pure virtual function.
< h3 class = fn > const char * < a name = "cfToMime" > < / a > TQWindowsMime::cfToMime ( int cf )< tt > [static]< / tt >
< / h3 >
Returns a MIME type for < em > cf< / em > , or 0 if none exists.
< h3 class = fn > < a href = "qbytearray.html" > TQByteArray< / a > < a name = "convertFromMime" > < / a > TQWindowsMime::convertFromMime ( < a href = "qbytearray.html" > TQByteArray< / a > data, const char * mime, int cf )< tt > [pure virtual]< / tt >
< / h3 >
< p > Returns < em > data< / em > converted from MIME type < em > mime< / em >
to Windows Clipboard format < em > cf< / em > .
< p > Note that Windows Clipboard formats must all be self-terminating. The
return value may contain trailing data.
< p > All subclasses must reimplement this pure virtual function.
< h3 class = fn > < a href = "qbytearray.html" > TQByteArray< / a > < a name = "convertToMime" > < / a > TQWindowsMime::convertToMime ( < a href = "qbytearray.html" > TQByteArray< / a > data, const char * mime, int cf )< tt > [pure virtual]< / tt >
< / h3 >
< p > Returns < em > data< / em > converted from Windows Clipboard format < em > cf< / em >
to MIME type < em > mime< / em > .
< p > Note that Windows Clipboard formats must all be self-terminating. The
input < em > data< / em > may contain trailing data.
< p > All subclasses must reimplement this pure virtual function.
< h3 class = fn > < a href = "qwindowsmime.html" > TQWindowsMime< / a > * < a name = "convertor" > < / a > TQWindowsMime::convertor ( const char * mime, int cf )< tt > [static]< / tt >
< / h3 >
Returns the most-recently created TQWindowsMime that can convert
between the < em > mime< / em > and < em > cf< / em > formats. Returns 0 if no such convertor
exists.
< h3 class = fn > const char * < a name = "convertorName" > < / a > TQWindowsMime::convertorName ()< tt > [pure virtual]< / tt >
< / h3 >
< p > Returns a name for the convertor.
< p > All subclasses must reimplement this pure virtual function.
< h3 class = fn > int < a name = "countCf" > < / a > TQWindowsMime::countCf ()< tt > [pure virtual]< / tt >
< / h3 >
< p > Returns the number of Windows Clipboard formats supported by this
convertor.
< p > All subclasses must reimplement this pure virtual function.
< h3 class = fn > void < a name = "initialize" > < / a > TQWindowsMime::initialize ()< tt > [static]< / tt >
< / h3 >
This is an internal function.
< h3 class = fn > const char * < a name = "mimeFor" > < / a > TQWindowsMime::mimeFor ( int cf )< tt > [pure virtual]< / tt >
< / h3 >
< p > Returns the MIME type used for Windows Clipboard format < em > cf< / em > , or
0 if this convertor does not support < em > cf< / em > .
< p > All subclasses must reimplement this pure virtual function.
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