# wx.FontMapper¶

wx.FontMapper manages user-definable correspondence between logical font names and the fonts present on the machine.

The default implementations of all functions will ask the user if they are not capable of finding the answer themselves and store the answer in a config file (configurable via SetConfigXXX functions). This behaviour may be disabled by giving the value of False to “interactive” parameter.

However, the functions will always consult the config file to allow the user-defined values override the default logic and there is no way to disable this - which shouldn’t be ever needed because if “interactive” was never True, the config file is never created anyhow.

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 EncodingConverter for “equivalent” encodings (e.g. iso8859-2 and cp1250) and tries them.

## Using FontMapper in conjunction with MBConv classes¶

If you need to display text in encoding which is not available at host system (see wx.FontMapper.IsEncodingAvailable ), you may use these two classes to find font in some similar encoding (see wx.FontMapper.GetAltForEncoding ) and convert the text to this encoding (MBConv classes). Following code snippet demonstrates it:

if not wx.FontMapper.Get().IsEncodingAvailable(enc, facename):
success, alt = wx.FontMapper.Get().GetAltForEncoding(enc, facename, False)
if success:
convFrom = wx.FontMapper.Get().GetEncodingName(enc)
convTo   = wx.FontMapper.Get().GetEncodingName(alt)
text = text.decode(convFrom).encode(convTo)

else:
# ...failure (or we may try iso8859-1/7bit ASCII)...
pass

# ...display text...


EncodingConverter , Writing Non-English Applications

## Class Hierarchy¶

Inheritance diagram for class FontMapper:

## Methods Summary¶

 __init__ Default constructor. CharsetToEncoding Returns the encoding for the given charset (in the form of RFC 2046) or FONTENCODING_SYSTEM if couldn’t decode it. Get Get the current font mapper object. GetAllEncodingNames Returns the array of all possible names for the given encoding. If it GetAltForEncoding Find an alternative for the given encoding (which is supposed to not be available on this system). GetEncoding Returns the n-th supported encoding. GetEncodingDescription Return user-readable string describing the given encoding. GetEncodingFromName Return the encoding corresponding to the given internal name. GetEncodingName Return internal string identifier for the encoding (see also wx.FontMapper.GetEncodingDescription ). GetSupportedEncodingsCount Returns the number of the font encodings supported by this class. IsEncodingAvailable Check whether given encoding is available in given face or not. Set Set the current font mapper object and return previous one (may be None). SetConfigPath Set the root config path to use (should be an absolute path). SetDialogParent The parent window for modal dialogs. SetDialogTitle The title for the dialogs (note that default is quite reasonable).

## Class API¶

class wx.FontMapper(object)

Possible constructors:

FontMapper()


FontMapper manages user-definable correspondence between logical font names and the fonts present on the machine.

### Methods¶

__init__(self)

Default constructor.

Note

The preferred way of creating a wx.FontMapper instance is to call wx.FontMapper.Get .

CharsetToEncoding(self, charset, interactive=True)

Returns the encoding for the given charset (in the form of RFC 2046) or FONTENCODING_SYSTEM if couldn’t decode it.

Be careful when using this function with 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 time than a simple function call. For these reasons, it is almost always a bad idea to call this function from the event handlers for repeatedly generated events such as EVT_PAINT .

Parameters
• charset (string) –

• interactive (bool) –

Return type

wx.FontEncoding

static Get()

Get the current font mapper object.

If there is no current object, creates one.

Return type

wx.FontMapper

static GetAllEncodingNames(encoding)

Returns the array of all possible names for the given encoding. If it isn’t empty, the first name in it is the canonical encoding name, i.e. the same string as returned by GetEncodingName()

Return type

list of strings

GetAltForEncoding(self, encoding, facename="", interactive=True)

Find an alternative for the given encoding (which is supposed to not be 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 FontEncoding which can consequently be passed to wx.Font constructor.

Parameters
• encoding (FontEncoding) –

• facename (string) –

• interactive (bool) –

Return type

tuple

Returns

( bool, alt_encoding )

static GetEncoding(n)

Returns the n-th supported encoding.

Together with GetSupportedEncodingsCount this method may be used to get all supported encodings.

Parameters

n (int) –

Return type

wx.FontEncoding

static GetEncodingDescription(encoding)

Return user-readable string describing the given encoding.

Parameters

encoding (FontEncoding) –

Return type

string

static GetEncodingFromName(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 .

Parameters

encoding (string) –

Return type

wx.FontEncoding

static GetEncodingName(encoding)

Return internal string identifier for the encoding (see also wx.FontMapper.GetEncodingDescription ).

Parameters

encoding (FontEncoding) –

Return type

string

static GetSupportedEncodingsCount()

Returns the number of the font encodings supported by this class.

Together with GetEncoding this method may be used to get all supported encodings.

Return type

int

IsEncodingAvailable(self, encoding, facename="")

Check whether given encoding is available in given face or not.

If no facename is given, find any font in this encoding.

Parameters
Return type

bool

static Set(mapper)

Set the current font mapper object and return previous one (may be None).

This method is only useful if you want to plug-in an alternative font mapper into wxWidgets.

Parameters

mapper (wx.FontMapper) –

Return type

wx.FontMapper

SetConfigPath(self, prefix)

Set the root config path to use (should be an absolute path).

Parameters

prefix (string) –

SetDialogParent(self, parent)

The parent window for modal dialogs.

Parameters

parent (wx.Window) –

SetDialogTitle(self, title)

The title for the dialogs (note that default is quite reasonable).

Parameters

title (string) –