wxfont

a font is an object which determines the appearance of text. fonts are used for drawing text to a device context, and setting the appearance of a window's text.

this class uses reference counting and copy-on-write internally so that assignments between two instances of this class are very cheap. you can therefore use actual objects instead of pointers without efficiency problems. if an instance of this class is changed it will create its own data internally so that other instances, which previously shared the data using the reference counting, are not affected.

you can retrieve the current system font settings with wxsystemsettings.

wxsystemsettings

derived from

wxgdiobject
wxobject

include files

constants

the possible values for the family parameter of wxfont constructor are (the old names are for compatibility only):

enum wxfontfamily
{
    wxfontfamily_default = wxdefault,
    wxfontfamily_decorative = wxdecorative,
    wxfontfamily_roman = wxroman,
    wxfontfamily_script = wxscript,
    wxfontfamily_swiss = wxswiss,
    wxfontfamily_modern = wxmodern,
    wxfontfamily_teletype = wxteletype,
    wxfontfamily_max
};

the possible values for the weight parameter are (the old names are for compatibility only):

enum wxfontweight
{
    wxfontweight_normal = wxnormal,
    wxfontweight_light = wxlight,
    wxfontweight_bold = wxbold,
    wxfontweight_max
};

the font flags which can be used during the font creation are:

enum
{
    // no special flags: font with default weight/slant/anti-aliasing
    wxfontflag_default          = 0,

    // slant flags (default: no slant)
    wxfontflag_italic           = 1 << 0,
    wxfontflag_slant            = 1 << 1,

    // weight flags (default: medium)
    wxfontflag_light            = 1 << 2,
    wxfontflag_bold             = 1 << 3,

    // anti-aliasing flag: force on or off (default: the current system default)
    wxfontflag_antialiased      = 1 << 4,
    wxfontflag_not_antialiased  = 1 << 5,

    // underlined/strikethrough flags (default: no lines)
    wxfontflag_underlined       = 1 << 6,
    wxfontflag_strikethrough    = 1 << 7,
};

the known font encodings are:

enum wxfontencoding
{
    wxfontencoding_system = -1,     // system default
    wxfontencoding_default,         // current default encoding

    // iso8859 standard defines a number of single-byte charsets
    wxfontencoding_iso8859_1,       // west european (latin1)
    wxfontencoding_iso8859_2,       // central and east european (latin2)
    wxfontencoding_iso8859_3,       // esperanto (latin3)
    wxfontencoding_iso8859_4,       // baltic (old) (latin4)
    wxfontencoding_iso8859_5,       // cyrillic
    wxfontencoding_iso8859_6,       // arabic
    wxfontencoding_iso8859_7,       // greek
    wxfontencoding_iso8859_8,       // hebrew
    wxfontencoding_iso8859_9,       // turkish (latin5)
    wxfontencoding_iso8859_10,      // variation of latin4 (latin6)
    wxfontencoding_iso8859_11,      // thai
    wxfontencoding_iso8859_12,      // doesn't exist currently, but put it
                                    // here anyhow to make all iso8859
                                    // consecutive numbers
    wxfontencoding_iso8859_13,      // baltic (latin7)
    wxfontencoding_iso8859_14,      // latin8
    wxfontencoding_iso8859_15,      // latin9 (a.k.a. latin0, includes euro)
    wxfontencoding_iso8859_max,

    // cyrillic charset soup (see http://czyborra.com/charsets/cyrillic.php)
    wxfontencoding_koi8,            // we don't support any of koi8 variants
    wxfontencoding_alternative,     // same as ms-dos cp866
    wxfontencoding_bulgarian,       // used under linux in bulgaria

    // what would we do without microsoft? they have their own encodings
        // for dos
    wxfontencoding_cp437,           // original ms-dos codepage
    wxfontencoding_cp850,           // cp437 merged with latin1
    wxfontencoding_cp852,           // cp437 merged with latin2
    wxfontencoding_cp855,           // another cyrillic encoding
    wxfontencoding_cp866,           // and another one
        // and for windows
    wxfontencoding_cp874,           // winthai
    wxfontencoding_cp1250,          // winlatin2
    wxfontencoding_cp1251,          // wincyrillic
    wxfontencoding_cp1252,          // winlatin1
    wxfontencoding_cp1253,          // wingreek (8859-7)
    wxfontencoding_cp1254,          // winturkish
    wxfontencoding_cp1255,          // winhebrew
    wxfontencoding_cp1256,          // winarabic
    wxfontencoding_cp1257,          // winbaltic (same as latin 7)
    wxfontencoding_cp12_max,

    wxfontencoding_utf7,            // utf-7 unicode encoding
    wxfontencoding_utf8,            // utf-8 unicode encoding

    wxfontencoding_unicode,         // unicode - currently used only by
                                    // wxencodingconverter class

    wxfontencoding_max
};

predefined objects

objects:

wxnullfont

pointers:

wxnormal_font
wxsmall_font
wxitalic_font
wxswiss_font

members

wxfont::wxfont
wxfont::~wxfont
wxfont::isfixedwidth
wxfont::getdefaultencoding
wxfont::getfacename
wxfont::getfamily
wxfont::getnativefontinfodesc
wxfont::getnativefontinfouserdesc
wxfont::getpointsize
wxfont::getstyle
wxfont::getunderlined
wxfont::getweight
wxfont::new
wxfont::isok
wxfont::setdefaultencoding
wxfont::setfacename
wxfont::setfamily
wxfont::setnativefontinfo
wxfont::setnativefontinfouserdesc
wxfont::setpointsize
wxfont::setstyle
wxfont::setunderlined
wxfont::setweight
wxfont::operator =
wxfont::operator ==
wxfont::operator !=

wxfont::wxfont

wxfont()

default constructor.

wxfont(const wxfont& font)

copy constructor, uses reference counting.

wxfont(int pointsize, wxfontfamily family, int style, wxfontweight weight, const bool underline = false, const wxstring& facename = "", wxfontencoding encoding = wxfontencoding_default)

wxfont(const wxsize& pixelsize, wxfontfamily family, int style, wxfontweight weight, const bool underline = false, const wxstring& facename = "", wxfontencoding encoding = wxfontencoding_default)

creates a font object with the specified attributes.

parameters

pointsize

size in points.

pixelsize

new

family

wxfontfamily_default	chooses a default font.
wxfontfamily_decorative	a decorative font.
wxfontfamily_roman	a formal, serif font.
wxfontfamily_script	a handwriting font.
wxfontfamily_swiss	a sans-serif font.
wxfontfamily_modern	a fixed pitch font.
wxfontfamily_teletype	a teletype font.

style

wxfontstyle_normal

wxfontstyle_slant

wxfontstyle_italic

weight

wxfontweight_normal	normal font.
wxfontweight_light	light font.
wxfontweight_bold	bold font.

underline

the value can be true or false. at present this has an effect on windows and motif 2.x only.

facename

an optional string specifying the actual typeface to be used. if it is an empty string, a default typeface will be chosen based on the family.

encoding

wxfontencoding_system	default system encoding.
wxfontencoding_default	default application encoding: this is the encoding set by calls to setdefaultencoding and which may be set to, say, koi8 to create all fonts by default with koi8 encoding. initially, the default application encoding is the same as default system encoding.
wxfontencoding_iso8859_1...15	iso8859 encodings.
wxfontencoding_koi8	the standard russian encoding for internet.
wxfontencoding_cp1250...1252	windows encodings similar to iso8859 (but not identical).

font encoding overview

remarks

if the desired font does not exist, the closest match will be chosen. under windows, only scalable truetype fonts are used.

wxfont::~wxfont

~wxfont()

destructor. see reference-counted object destruction for more info.

remarks

although all remaining fonts are deleted when the application exits, the application should try to clean up all fonts itself. this is because wxwidgets cannot know if a pointer to the font object is stored in an application data structure, and there is a risk of double deletion.

wxfont::isfixedwidth

bool isfixedwidth() const

returns true if the font is a fixed width (or monospaced) font, false if it is a proportional one or font is invalid.

wxfont::getdefaultencoding

static wxfontencoding getdefaultencoding()

returns the current application's default encoding.

wxfont::getfacename

wxstring getfacename() const

returns the typeface name associated with the font, or the empty string if there is no typeface information.

see also

wxfont::setfacename

wxfont::getfamily

wxfontfamily getfamily() const

gets the font family. see wxfont::setfamily for a list of valid family identifiers.

see also

wxfont::setfamily

wxfont::getnativefontinfodesc

wxstring getnativefontinfodesc() const

returns the platform-dependent string completely describing this font. returned string is always non-empty. note that the returned string is not meant to be shown or edited by the user: a typical use of this function is for serializing in string-form a wxfont object.

wxfont::getnativefontinfouserdesc

wxstring getnativefontinfouserdesc()

returns a user-friendly string for this font object. returned string is always non-empty. some examples of the formats of returned strings (which are platform-dependent) are in setnativefontinfouserdesc.

see also

wxfont::getnativefontinfodesc

wxfont::getpointsize

int getpointsize() const

gets the point size.

see also

wxfont::setpointsize

wxfont::getstyle

int getstyle() const

gets the font style. see wxfont::wxfont for a list of valid styles.

see also

wxfont::setstyle

wxfont::getunderlined

bool getunderlined() const

returns true if the font is underlined, false otherwise.

see also

wxfont::setunderlined

wxfont::getweight

wxfontweight getweight() const

gets the font weight. see wxfont::wxfont for a list of valid weight identifiers.

see also

wxfont::setweight

wxfont::new

static wxfont * new(int pointsize, wxfontfamily family, int style, wxfontweight weight, const bool underline = false, const wxstring& facename = "", wxfontencoding encoding = wxfontencoding_default)

static wxfont * new(int pointsize, wxfontfamily family, int flags = wxfontflag_default, const wxstring& facename = "", wxfontencoding encoding = wxfontencoding_default)

static wxfont * new(const wxsize& pixelsize, wxfontfamily family, int style, wxfontweight weight, const bool underline = false, const wxstring& facename = "", wxfontencoding encoding = wxfontencoding_default)

static wxfont * new(const wxsize& pixelsize, wxfontfamily family, int flags = wxfontflag_default, const wxstring& facename = "", wxfontencoding encoding = wxfontencoding_default)

these functions take the same parameters as wxfont constructor and return a new font object allocated on the heap.

using new() is currently the only way to directly create a font with the given size in pixels on platforms other than wxmsw.

wxfont::isok

bool isok() const

returns true if this object is a valid font, false otherwise.

wxfont::setdefaultencoding

static void setdefaultencoding(wxfontencoding encoding)

sets the default font encoding.

wxfont::setfacename

bool setfacename(const wxstring& facename)

sets the facename for the font. returns true if the given face name exists; false otherwise.

parameters

facename

a valid facename, which should be on the end-user's system.

remarks

to avoid portability problems, don't rely on a specific face, but specify the font family instead or as well. a suitable font will be found on the end-user's system. if both the family and the facename are specified, wxwidgets will first search for the specific face, and then for a font belonging to the same family.

see also

wxfont::getfacename, wxfont::setfamily

wxfont::setfamily

void setfamily(wxfontfamily family)

sets the font family.

parameters

family

wxfontfamily_default	chooses a default font.
wxfontfamily_decorative	a decorative font.
wxfontfamily_roman	a formal, serif font.
wxfontfamily_script	a handwriting font.
wxfontfamily_swiss	a sans-serif font.
wxfontfamily_modern	a fixed pitch font.
wxfontfamily_teletype	a teletype font.

see also

wxfont::getfamily, wxfont::setfacename

wxfont::setnativefontinfo

bool setnativefontinfo(const wxstring& info)

creates the font corresponding to the given native font description string and returns true if the creation was successful. which must have been previously returned by getnativefontinfodesc. if the string is invalid, font is unchanged. this function is typically used for de-serializing a wxfont object previously saved in a string-form.

see also

wxfont::setnativefontinfouserdesc

bool setnativefontinfouserdesc(const wxstring& info)

creates the font corresponding to the given native font description string and returns true if the creation was successful. unlike setnativefontinfo, this function accepts strings which are user-friendly. examples of accepted string formats are:

generic syntax	example
on wxgtk2: `[face-name] [bold] [oblique\|italic] [pointsize]`	monospace bold 10
on wxmsw: `[light\|bold] [italic] [face-name] [pointsize] [encoding]`	tahoma 10 windows-1252
on wxmac: fixme	fixme

for more detailed information about the allowed syntaxes you can look at the documentation of the native api used for font-rendering (e.g. pango_font_description_from_string).

see also

wxfont::setnativefontinfo

wxfont::setpointsize

void setpointsize(int pointsize)

sets the point size.

parameters

pointsize

size in points.

see also

wxfont::getpointsize

wxfont::setstyle

void setstyle(int style)

sets the font style.

parameters

style

wxfontstyle_normal

wxfontstyle_slant

wxfontstyle_italic

see also

wxfont::getstyle

wxfont::setunderlined

void setunderlined(const bool underlined)

sets underlining.

parameters

underlining

true to underline, false otherwise.

see also

wxfont::getunderlined

wxfont::setweight

void setweight(wxfontweight weight)

sets the font weight.

parameters

weight

wxfontweight_normal	normal font.
wxfontweight_light	light font.
wxfontweight_bold	bold font.

see also

wxfont::getweight

wxfont::operator =

wxfont& operator =(const wxfont& font)

assignment operator, using reference counting.

wxfont::operator ==

bool operator ==(const wxfont& font)

equality operator. see reference-counted object comparison for more info.

wxfont::operator !=

bool operator !=(const wxfont& font)

inequality operator. see reference-counted object comparison for more info.