In case everything else fails (i.e. there is no record in config file
and "interactive" is @false or user denied to choose any replacement),
- the class queries wxEncodingConverter
- for "equivalent" encodings (e.g. iso8859-2 and cp1250) and tries them.
+ the class queries wxEncodingConverter for "equivalent" encodings
+ (e.g. iso8859-2 and cp1250) and tries them.
+
+
+ @section fontmapper_mbconv Using wxFontMapper in conjunction with wxMBConv classes
+
+ If you need to display text in encoding which is not available at host
+ system (see wxFontMapper::IsEncodingAvailable), you may use these two
+ classes to find font in some similar encoding (see wxFontMapper::GetAltForEncoding)
+ and convert the text to this encoding (wxMBConv classes).
+ Following code snippet demonstrates it:
+
+ @code
+ if (!wxFontMapper::Get()->IsEncodingAvailable(enc, facename))
+ {
+ wxFontEncoding alternative;
+ if (wxFontMapper::Get()->GetAltForEncoding(enc, &alternative,
+ facename, false))
+ {
+ wxCSConv convFrom(wxFontMapper::Get()->GetEncodingName(enc));
+ wxCSConv convTo(wxFontMapper::Get()->GetEncodingName(alternative));
+ text = wxString(text.mb_str(convFrom), convTo);
+ }
+ else
+ ...failure (or we may try iso8859-1/7bit ASCII)...
+ }
+ ...display text...
+ @endcode
@library{wxcore}
- @category{misc}
+ @category{cfg}
- @see wxEncodingConverter, @ref overview_nonenglishoverview "Writing non-English
- applications"
+ @see wxEncodingConverter, @ref overview_nonenglish
*/
class wxFontMapper
{
public:
/**
Default ctor.
+
+ @note
+ The preferred way of creating a wxFontMapper instance is to call wxFontMapper::Get().
*/
wxFontMapper();
/**
- Virtual dtor for a base class.
+ Virtual dtor.
*/
- ~wxFontMapper();
+ virtual ~wxFontMapper();
/**
Returns the encoding for the given charset (in the form of RFC 2046) or
@c wxFONTENCODING_SYSTEM if couldn't decode it.
+
Be careful when using this function with @a interactive set to @true
(default value) as the function then may show a dialog box to the user which
may lead to unexpected reentrancies and may also take a significantly longer
idea to call this function from the event handlers for repeatedly generated
events such as @c EVT_PAINT.
*/
- wxFontEncoding CharsetToEncoding(const wxString& charset,
- bool interactive = true);
+ virtual wxFontEncoding CharsetToEncoding(const wxString& charset,
+ bool interactive = true);
/**
- Get the current font mapper object. If there is no current object, creates
- one.
+ Get the current font mapper object. If there is no current object, creates one.
@see Set()
*/
static wxFontMapper* Get();
/**
- Returns the array of all possible names for the given encoding. The array is
- @NULL-terminated. IF it isn't empty, the first name in it is the canonical
- encoding name, i.e. the same string as returned by
+ Returns the array of all possible names for the given encoding.
+
+ The array is @NULL-terminated. IF it isn't empty, the first name in it is
+ the canonical encoding name, i.e. the same string as returned by
GetEncodingName().
*/
static const wxChar** GetAllEncodingNames(wxFontEncoding encoding);
available on this system). If successful, return @true and fill info
structure with the parameters required to create the font, otherwise
return @false.
+
The first form is for wxWidgets' internal use while the second one
is better suitable for general use -- it returns wxFontEncoding which
can consequently be passed to wxFont constructor.
//@}
/**
- Returns the @e n-th supported encoding. Together with
- GetSupportedEncodingsCount()
- this method may be used to get all supported encodings.
+ Returns the @e n-th supported encoding.
+
+ Together with GetSupportedEncodingsCount() this method may be used
+ to get all supported encodings.
*/
static wxFontEncoding GetEncoding(size_t n);
static wxString GetEncodingDescription(wxFontEncoding encoding);
/**
- Return the encoding corresponding to the given internal name. This function is
- the inverse of GetEncodingName() and is
- intentionally less general than
- CharsetToEncoding(), i.e. it doesn't
- try to make any guesses nor ever asks the user. It is meant just as a way of
- restoring objects previously serialized using
- GetEncodingName().
+ Return the encoding corresponding to the given internal name.
+
+ This function is the inverse of GetEncodingName() and is intentionally
+ less general than CharsetToEncoding(), i.e. it doesn't try to make any
+ guesses nor ever asks the user. It is meant just as a way of restoring
+ objects previously serialized using GetEncodingName().
*/
static wxFontEncoding GetEncodingFromName(const wxString& encoding);
/**
Return internal string identifier for the encoding (see also
- wxFontMapper::GetEncodingDescription)
+ wxFontMapper::GetEncodingDescription).
@see GetEncodingFromName()
*/
static wxString GetEncodingName(wxFontEncoding encoding);
/**
- Returns the number of the font encodings supported by this class. Together with
- GetEncoding() this method may be used to get
+ Returns the number of the font encodings supported by this class.
+ Together with GetEncoding() this method may be used to get
all supported encodings.
*/
static size_t GetSupportedEncodingsCount();
Check whether given encoding is available in given face or not.
If no facename is given, find @e any font in this encoding.
*/
- bool IsEncodingAvailable(wxFontEncoding encoding,
- const wxString& facename = wxEmptyString);
+ virtual bool IsEncodingAvailable(wxFontEncoding encoding,
+ const wxString& facename = wxEmptyString);
/**
Set the current font mapper object and return previous one (may be @NULL).
/**
Set the config object to use (may be @NULL to use default).
By default, the global one (from wxConfigBase::Get() will be used)
- and the default root path for the config settings is the string returned by
- GetDefaultConfigPath().
+ and the default root path for the config settings is the string returned
+ by GetDefaultConfigPath().
*/
void SetConfig(wxConfigBase* config);
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