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.

You can retrieve the current system font settings with wxSystemSettings.

wxSystemSettings

Derived from

wxGDIObject
wxObject

Include files

<wx/font.h>

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.html)
    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

See also

wxFont overview, wxDC::SetFont, wxDC::DrawText, wxDC::GetTextExtent, wxFontDialog, wxSystemSettings



wxFont::wxFont



wxFont(void)

Default constructor.



wxFont(int pointSize, wxFontFamily family, int style, wxFontWeight weight, const bool underline = false, const wxString& faceName = "", wxFontEncoding encoding = wxFONTENCODING_DEFAULT)



wxFont(int 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
Size in pixels: this is directly supported only under MSW currently where this constructor can be used directly, under other platforms a font with the closest size to the given one is found using binary search and the static New method must be used.

family
Font family, a generic way of referring to fonts without specifying actual facename. One of:

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
One of wxFONTSTYLE_NORMAL, wxFONTSTYLE_SLANT and wxFONTSTYLE_ITALIC.

weight
Font weight, sometimes also referred to as font boldness. One of:

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
An encoding which may be one of
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).
If the specified encoding isn't available, no font is created (see also 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.

See also wxDC::SetFont, wxDC::DrawText and wxDC::GetTextExtent.



wxFont::~wxFont



~wxFont(void)

Destructor.

Remarks

The destructor may not delete the underlying font object of the native windowing system, since wxFont uses a reference counting system for efficiency.

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(void) 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(void)

Returns the current application's default encoding.

See also

Font encoding overview, SetDefaultEncoding



wxFont::GetFaceName

wxString GetFaceName(void) 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(void) const

Gets the font family. See wxFont::SetFamily for a list of valid family identifiers.

See also

wxFont::SetFamily



wxFont::GetNativeFontInfoDesc

wxString GetNativeFontInfoDesc(void) const

Returns the platform-dependent string completely describing this font or an empty string if the font wasn't constructed using the native font description.

See also

wxFont::SetNativeFontInfo



wxFont::GetPointSize

int GetPointSize(void) const

Gets the point size.

See also

wxFont::SetPointSize



wxFont::GetStyle

int GetStyle(void) const

Gets the font style. See wxFont::wxFont for a list of valid styles.

See also

wxFont::SetStyle



wxFont::GetUnderlined

bool GetUnderlined(void) const

Returns true if the font is underlined, false otherwise.

See also

wxFont::SetUnderlined



wxFont::GetWeight

wxFontWeight GetWeight(void) 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::Ok

bool Ok(void) const

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



wxFont::SetDefaultEncoding



static void SetDefaultEncoding(wxFontEncoding encoding)

Sets the default font encoding.

See also

Font encoding overview, GetDefaultEncoding



wxFont::SetFaceName



void SetFaceName(const wxString& faceName)

Sets the facename for the font.

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
One of:

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



void SetNativeFontInfo(const wxString& info)

Creates the font corresponding to the given native font description string which must have been previously returned by GetNativeFontInfoDesc. If the string is invalid, font is unchanged.



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
One of wxFONTSTYLE_NORMAL, wxFONTSTYLE_SLANT and 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
One of:

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. Returns a reference to `this'.



wxFont::operator $==$



bool operator $==$(const wxFont& font)

Equality operator. Two fonts are equal if they contain pointers to the same underlying font data. It does not compare each attribute, so two independently-created fonts using the same parameters will fail the test.



wxFont::operator $\!=$



bool operator $\!=$(const wxFont& font)

Inequality operator. Two fonts are not equal if they contain pointers to different underlying font data. It does not compare each attribute.

ymasuda 平成17年11月19日