QFontDatabase Class Reference

#include <qfontdatabase.h>

Collaboration diagram for QFontDatabase:

[legend]List of all members.

---

Detailed Description

The QFontDatabase class provides information about the fonts available in the underlying window system.

The most common uses of this class are to query the database for the list of font families() and for the pointSizes() and styles() that are available for each family. An alternative to pointSizes() is smoothSizes() which returns the sizes at which a given family and style will look attractive.

If the font family is available from two or more foundries the foundry name is included in the family name, e.g. "Helvetica [Adobe]" and "Helvetica [Cronyx]". When you specify a family you can either use the old hyphenated Qt 2.x "foundry-family" format, e.g. "Cronyx-Helvetica", or the new bracketed Qt 3.x "family [foundry]" format e.g. "Helvetica [Cronyx]". If the family has a foundry it is always returned, e.g. by families(), using the bracketed format.

The font() function returns a QFont given a family, style and point size.

A family and style combination can be checked to see if it is italic() or bold(), and to retrieve its weight(). Similarly we can call isBitmapScalable(), isSmoothlyScalable(), isScalable() and isFixedPitch().

Use the styleString() to obtain a text version of a style.

The QFontDatabase class also supports some static functions, for example, standardSizes(). You can retrieve the description of a writing system using writingSystemName(), and a sample of characters in a writing system with writingSystemSample().

Example:

snippets/qfontdatabase/main.cpp QFontDatabase database; } }

This example gets the list of font families, the list of styles for each family, and the point sizes that are available for each combination of family and style, displaying this information in a tree view.

See also:

QFont, QFontInfo, QFontMetrics, QFontComboBox, {Character Map Example}

Definition at line 46 of file qfontdatabase.h.

Public Types
enum	WritingSystem
Public Member Functions
	QFontDatabase ()
QList< WritingSystem >	writingSystems () const
QList< WritingSystem >	writingSystems (const QString &family) const
QStringList	families (WritingSystem writingSystem=Any) const
QStringList	styles (const QString &family) const
QList< int >	pointSizes (const QString &family, const QString &style=QString())
QList< int >	smoothSizes (const QString &family, const QString &style)
QString	styleString (const QFont &font)
QString	styleString (const QFontInfo &fontInfo)
QFont	font (const QString &family, const QString &style, int pointSize) const
bool	isBitmapScalable (const QString &family, const QString &style=QString()) const
bool	isSmoothlyScalable (const QString &family, const QString &style=QString()) const
bool	isScalable (const QString &family, const QString &style=QString()) const
bool	isFixedPitch (const QString &family, const QString &style=QString()) const
bool	italic (const QString &family, const QString &style) const
bool	bold (const QString &family, const QString &style) const
int	weight (const QString &family, const QString &style) const
Static Public Member Functions
static QList< int >	standardSizes ()
static QString	writingSystemName (WritingSystem writingSystem)
static QString	writingSystemSample (WritingSystem writingSystem)
static int	addApplicationFont (const QString &fileName)
static int	addApplicationFontFromData (const QByteArray &fontData)
static QStringList	applicationFontFamilies (int id)
static bool	removeApplicationFont (int id)
static bool	removeAllApplicationFonts ()
Static Private Member Functions
static void	createDatabase ()
static void	parseFontName (const QString &name, QString &foundry, QString &family)
static QFontEngine *	findFont (int script, const QFontPrivate *fp, const QFontDef &request, int force_encoding_id=-1)
Private Attributes
QFontDatabasePrivate *	d
Friends
struct	QFontDef
class	QFontPrivate
class	QFontDialog
class	QFontEngineMultiXLFD

---

Member Enumeration Documentation

enum QFontDatabase::WritingSystem

Any Latin Greek Cyrillic Armenian Hebrew Arabic Syriac Thaana Devanagari Bengali Gurmukhi Gujarati Oriya Tamil Telugu Kannada Malayalam Sinhala Thai Lao Tibetan Myanmar Georgian Khmer SimplifiedChinese TraditionalChinese Japanese Korean Vietnamese Symbol Other (the same as Symbol) Ogham Runic

WritingSystemsCount

Definition at line 51 of file qfontdatabase.h.

                       {
        Any,

        Latin,
        Greek,
        Cyrillic,
        Armenian,
        Hebrew,
        Arabic,
        Syriac,
        Thaana,
        Devanagari,
        Bengali,
        Gurmukhi,
        Gujarati,
        Oriya,
        Tamil,
        Telugu,
        Kannada,
        Malayalam,
        Sinhala,
        Thai,
        Lao,
        Tibetan,
        Myanmar,
        Georgian,
        Khmer,
        SimplifiedChinese,
        TraditionalChinese,
        Japanese,
        Korean,
        Vietnamese,

        Symbol,
        Other = Symbol,

        Ogham,
        Runic,

        WritingSystemsCount
    };

---

Constructor & Destructor Documentation

QFontDatabase::QFontDatabase

(

)

Creates a font database object.

Definition at line 1359 of file qfontdatabase.cpp.

References createDatabase(), and d.

{
    createDatabase();

    d = privateDb();
}

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---

Member Function Documentation

QList< int > QFontDatabase::standardSizes

(

)

[static]

Returns a list of standard font sizes.

See also:

smoothSizes(), pointSizes()

Definition at line 1835 of file qfontdatabase.cpp.

Referenced by MainWindow::findSizes(), pointSizes(), TextEdit::setupTextActions(), and smoothSizes().

{
    QList<int> ret;
    static const unsigned short standard[] =
        { 6, 7, 8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 24, 26, 28, 36, 48, 72, 0 };
    const unsigned short *sizes = standard;
    while (*sizes) ret << *sizes++;
    return ret;
}

QList< QFontDatabase::WritingSystem > QFontDatabase::writingSystems

(

)

const

Returns a sorted list of the available writing systems. This is list generated from information about all installed fonts on the system.

See also:

families()

Definition at line 1414 of file qfontdatabase.cpp.

References checkSymbolFonts(), QFontDatabasePrivate::count, d, QFontDatabasePrivate::families, i, Latin, load(), qSort(), QtFontFamily::Supported, WritingSystemsCount, and x.

{
    ::load();
#ifdef Q_WS_X11
    ::checkSymbolFonts();
#endif

    QList<WritingSystem> list;
    for (int i = 0; i < d->count; ++i) {
        QtFontFamily *family = d->families[i];
        if (family->count == 0)
            continue;
        for (int x = Latin; x < WritingSystemsCount; ++x) {
            const WritingSystem writingSystem = WritingSystem(x);
            if (!(family->writingSystems[writingSystem] & QtFontFamily::Supported))
                continue;
            if (!list.contains(writingSystem))
                list.append(writingSystem);
        }
    }
    qSort(list);
    return list;
}

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QList< QFontDatabase::WritingSystem > QFontDatabase::writingSystems

(

const QString &

family

)

const

Returns a sorted list of the writing systems supported by a given font family.

See also:

families()

Definition at line 1445 of file qfontdatabase.cpp.

References checkSymbolFonts(), QtFontFamily::count, d, QFontDatabasePrivate::family(), Latin, load(), parseFontName(), QtFontFamily::Supported, QtFontFamily::writingSystems, WritingSystemsCount, and x.

{
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    ::load();
#ifdef Q_WS_X11
    ::checkSymbolFonts(familyName);
#endif

    QList<WritingSystem> list;
    QtFontFamily *f = d->family(familyName);
    if (!f || f->count == 0)
        return list;

    for (int x = Latin; x < WritingSystemsCount; ++x) {
        const WritingSystem writingSystem = WritingSystem(x);
        if (f->writingSystems[writingSystem] & QtFontFamily::Supported)
            list.append(writingSystem);
    }
    return list;
}

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QStringList QFontDatabase::families

(

WritingSystem

writingSystem = Any

)

const

Returns a sorted list of the available font families which support the writingSystem.

If a family exists in several foundries, the returned name for that font is in the form "family [foundry]". Examples: "Times [Adobe]", "Times [Cronyx]", "Palatino".

See also:

writingSystems()

Definition at line 1479 of file qfontdatabase.cpp.

References Any, QList< T >::append(), checkSymbolFonts(), QFontDatabasePrivate::count, QtFontFamily::count, d, QFontDatabasePrivate::families, QtFontFamily::foundries, i, j, load(), QtFontFoundry::name, QtFontFamily::name, QtFontFamily::Supported, and QtFontFamily::writingSystems.

Referenced by QFontComboBoxPrivate::_q_updateModel(), and MainWindow::setupFontTree().

{
    ::load();
#ifdef Q_WS_X11
    if (writingSystem != Any)
        ::checkSymbolFonts();
#endif

    QStringList flist;
    for (int i = 0; i < d->count; i++) {
        QtFontFamily *f = d->families[i];
        if (f->count == 0)
            continue;
        if (writingSystem != Any && (f->writingSystems[writingSystem] != QtFontFamily::Supported))
            continue;
        if (f->count == 1) {
            flist.append(f->name);
        } else {
            for (int j = 0; j < f->count; j++) {
                QString str = f->name;
                QString foundry = f->foundries[j]->name;
                if (!foundry.isEmpty()) {
                    str += QLatin1String(" [");
                    str += foundry;
                    str += QLatin1String("]");
                }
                flist.append(str);
            }
        }
    }
    return flist;
}

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QStringList QFontDatabase::styles

(

const QString &

family

)

const

Returns a list of the styles available for the font family family. Some example styles: "Light", "Light Italic", "Bold", "Oblique", "Demi". The list may be empty.

See also:

families()

Definition at line 1519 of file qfontdatabase.cpp.

References QtFontFoundry::count, QtFontFamily::count, d, QFontDatabasePrivate::family(), QtFontFamily::foundries, i, QString::isEmpty(), j, QtFontStyle::key, l, load(), parseFontName(), QtFontFoundry::style(), QtFontFoundry::styles, styleString(), and ucstricmp().

Referenced by MainWindow::familySelected(), MainWindow::findStyles(), and MainWindow::setupFontTree().

{
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    ::load(familyName);

    QStringList l;
    QtFontFamily *f = d->family(familyName);
    if (!f)
        return l;

    QtFontFoundry allStyles(foundryName);
    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() || ucstricmp(foundry->name, foundryName) == 0) {
            for (int k = 0; k < foundry->count; k++) {
                QtFontStyle::Key ke(foundry->styles[k]->key);
                ke.stretch = 0;
                allStyles.style(ke, true);
            }
        }
    }

    for (int i = 0; i < allStyles.count; i++)
        l.append(::styleString(allStyles.styles[i]->key.weight, (QFont::Style)allStyles.styles[i]->key.style));
    return l;
}

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QList< int > QFontDatabase::pointSizes	(	const QString &	family,
		const QString &	style = QString()
	)

Returns a list of the point sizes available for the font that has family family and style style. The list may be empty.

See also:

smoothSizes(), standardSizes()

Definition at line 1667 of file qfontdatabase.cpp.

References QX11Info::appDpiY(), QList< T >::append(), QList< T >::contains(), QString::count(), QtFontFamily::count, d, QFontDatabasePrivate::family(), QtFontFamily::foundries, QString::isEmpty(), j, l, load(), parseFontName(), qRound(), size, standardSizes(), and ucstricmp().

{
#if defined(Q_WS_WIN)
    // windows and macosx are always smoothly scalable
    Q_UNUSED(family);
    Q_UNUSED(style);
    return standardSizes();
#else
    bool smoothScalable = false;
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    ::load(familyName);

    QtFontStyle::Key styleKey(style);

    QList<int> sizes;

    QtFontFamily *fam = d->family(familyName);
    if (!fam) return sizes;


#ifdef Q_WS_X11
    int dpi = QX11Info::appDpiY();
#else
    const int dpi = 72; // embedded
#endif

    for (int j = 0; j < fam->count; j++) {
        QtFontFoundry *foundry = fam->foundries[j];
        if (foundryName.isEmpty() || ucstricmp(foundry->name, foundryName) == 0) {
            QtFontStyle *style = foundry->style(styleKey);
            if (!style) continue;

            if (style->smoothScalable) {
                smoothScalable = true;
                goto end;
            }
            for (int l = 0; l < style->count; l++) {
                const QtFontSize *size = style->pixelSizes + l;

                if (size->pixelSize != 0 && size->pixelSize != USHRT_MAX) {
                    const uint pointSize = qRound(size->pixelSize * dpi / 72.);
                    if (! sizes.contains(pointSize))
                        sizes.append(pointSize);
                }
            }
        }
    }
 end:
    if (smoothScalable)
        return standardSizes();

    qSort(sizes);
    return sizes;
#endif
}

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QList< int > QFontDatabase::smoothSizes	(	const QString &	family,
		const QString &	style
	)

Returns the point sizes of a font that has family family and style style that will look attractive. The list may be empty. For non-scalable fonts and bitmap scalable fonts, this function is equivalent to pointSizes().

See also:

pointSizes(), standardSizes()

Definition at line 1771 of file qfontdatabase.cpp.

References QX11Info::appDpiY(), QList< T >::append(), QList< T >::contains(), QString::count(), QtFontFamily::count, d, QFontDatabasePrivate::family(), QtFontFamily::foundries, QString::isEmpty(), j, l, load(), parseFontName(), qRound(), size, standardSizes(), and ucstricmp().

Referenced by MainWindow::findSizes().

{
#ifdef Q_WS_WIN
    Q_UNUSED(family);
    Q_UNUSED(style);
    return QFontDatabase::standardSizes();
#else
    bool smoothScalable = false;
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    ::load(familyName);

    QtFontStyle::Key styleKey(style);

    QList<int> sizes;

    QtFontFamily *fam = d->family(familyName);
    if (!fam)
        return sizes;

#ifdef Q_WS_X11
    int dpi = QX11Info::appDpiY();
#else
    const int dpi = 72; // embedded
#endif
    for (int j = 0; j < fam->count; j++) {
        QtFontFoundry *foundry = fam->foundries[j];
        if (foundryName.isEmpty() ||
             ucstricmp(foundry->name, foundryName) == 0) {
            QtFontStyle *style = foundry->style(styleKey);
            if (!style) continue;

            if (style->smoothScalable) {
                smoothScalable = true;
                goto end;
            }
            for (int l = 0; l < style->count; l++) {
                const QtFontSize *size = style->pixelSizes + l;

                if (size->pixelSize != 0 && size->pixelSize != USHRT_MAX) {
                    const uint pointSize = qRound(size->pixelSize * dpi / 72.);
                    if (! sizes.contains(pointSize))
                        sizes.append(pointSize);
                }
            }
        }
    }
 end:
    if (smoothScalable)
        return QFontDatabase::standardSizes();

    qSort(sizes);
    return sizes;
#endif
}

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QString QFontDatabase::styleString

(

const QFont &

font

)

Returns a string that describes the style of the font. For example, "Bold Italic", "Bold", "Italic" or "Normal". An empty string may be returned.

Definition at line 1287 of file qfontdatabase.cpp.

References font(), QFont::style(), styleString(), and QFont::weight().

Referenced by MainWindow::findSizes(), and styles().

{
    return ::styleString(font.weight(), font.style());
}

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QString QFontDatabase::styleString

(

const QFontInfo &

fontInfo

)

Returns a string that describes the style of the fontInfo. For example, "Bold Italic", "Bold", "Italic" or "Normal". An empty string may be returned.

Definition at line 1297 of file qfontdatabase.cpp.

References QFontInfo::style(), styleString(), and QFontInfo::weight().

{
    return ::styleString(fontInfo.weight(), fontInfo.style());
}

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QFont QFontDatabase::font	(	const QString &	family,
		const QString &	style,
		int	pointSize
	)			const

Returns a QFont object that has family family, style style and point size pointSize. If no matching font could be created, a QFont object that uses the application's default font is returned.

Definition at line 1732 of file qfontdatabase.cpp.

References bestStyle(), QtFontFamily::count, d, QFontDatabasePrivate::family(), QApplication::font(), QtFontFamily::foundries, QString::isEmpty(), j, load(), parseFontName(), s, QFont::setStyle(), QtFontFoundry::style(), and ucstricmp().

Referenced by MainWindow::buildFont(), MainWindow::fileSave(), styleString(), and CharacterWidget::updateStyle().

{
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    ::load(familyName);

    QtFontFoundry allStyles(foundryName);
    QtFontFamily *f = d->family(familyName);
    if (!f) return QApplication::font();

    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() || ucstricmp(foundry->name, foundryName) == 0) {
            for (int k = 0; k < foundry->count; k++)
                allStyles.style(foundry->styles[k]->key, true);
        }
    }

    QtFontStyle::Key styleKey(style);
    QtFontStyle *s = bestStyle(&allStyles, styleKey);

    if (!s) // no styles found?
        return QApplication::font();
    QFont fnt(family, pointSize, s->key.weight);
    fnt.setStyle((QFont::Style)s->key.style);
    return fnt;
}

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bool QFontDatabase::isBitmapScalable	(	const QString &	family,
		const QString &	style = QString()
	)			const

Returns true if the font that has family family and style style is a scalable bitmap font; otherwise returns false. Scaling a bitmap font usually produces an unattractive hardly readable result, because the pixels of the font are scaled. If you need to scale a bitmap font it is better to scale it to one of the fixed sizes returned by smoothSizes().

See also:

isScalable(), isSmoothlyScalable()

Definition at line 1580 of file qfontdatabase.cpp.

References QtFontFamily::count, d, QFontDatabasePrivate::family(), QtFontFamily::foundries, QString::isEmpty(), j, load(), parseFontName(), and ucstricmp().

Referenced by isScalable().

{
    bool bitmapScalable = false;
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    ::load(familyName);

    QtFontStyle::Key styleKey(style);

    QtFontFamily *f = d->family(familyName);
    if (!f) return bitmapScalable;

    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() || ucstricmp(foundry->name, foundryName) == 0) {
            for (int k = 0; k < foundry->count; k++)
                if ((style.isEmpty() || foundry->styles[k]->key == styleKey)
                    && foundry->styles[k]->bitmapScalable && !foundry->styles[k]->smoothScalable) {
                    bitmapScalable = true;
                    goto end;
                }
        }
    }
 end:
    return bitmapScalable;
}

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bool QFontDatabase::isSmoothlyScalable	(	const QString &	family,
		const QString &	style = QString()
	)			const

Returns true if the font that has family family and style style is smoothly scalable; otherwise returns false. If this function returns true, it's safe to scale this font to any size, and the result will always look attractive.

See also:

isScalable(), isBitmapScalable()

Definition at line 1618 of file qfontdatabase.cpp.

References QtFontFamily::count, d, QFontDatabasePrivate::family(), QtFontFamily::foundries, QString::isEmpty(), j, load(), parseFontName(), and ucstricmp().

Referenced by QFontComboBoxPrivate::_q_updateModel(), MainWindow::findSizes(), and isScalable().

{
    bool smoothScalable = false;
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    ::load(familyName);

    QtFontStyle::Key styleKey(style);

    QtFontFamily *f = d->family(familyName);
    if (!f) return smoothScalable;

    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() || ucstricmp(foundry->name, foundryName) == 0) {
            for (int k = 0; k < foundry->count; k++)
                if ((style.isEmpty() || foundry->styles[k]->key == styleKey) && foundry->styles[k]->smoothScalable) {
                    smoothScalable = true;
                    goto end;
                }
        }
    }
 end:
    return smoothScalable;
}

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bool QFontDatabase::isScalable	(	const QString &	family,
		const QString &	style = QString()
	)			const

Returns true if the font that has family family and style style is scalable; otherwise returns false.

See also:

isBitmapScalable(), isSmoothlyScalable()

Definition at line 1651 of file qfontdatabase.cpp.

References isBitmapScalable(), and isSmoothlyScalable().

{
    if (isSmoothlyScalable(family, style))
        return true;

    return isBitmapScalable(family, style);
}

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bool QFontDatabase::isFixedPitch	(	const QString &	family,
		const QString &	style = QString()
	)			const

Returns true if the font that has family family and style style is fixed pitch; otherwise returns false.

Definition at line 1553 of file qfontdatabase.cpp.

References d, QFontDatabasePrivate::family(), QtFontFamily::fixedPitch, load(), and parseFontName().

Referenced by QFontComboBoxPrivate::_q_updateModel().

{
    Q_UNUSED(style);

    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    ::load(familyName);

    QtFontFamily *f = d->family(familyName);
#if !defined(QWS) && defined(Q_OS_MAC)
    qt_mac_get_fixed_pitch(f);
#endif
    return (f && f->fixedPitch);
}

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bool QFontDatabase::italic	(	const QString &	family,
		const QString &	style
	)			const

Returns true if the font that has family family and style style is italic; otherwise returns false.

See also:

weight(), bold()

Definition at line 1852 of file qfontdatabase.cpp.

References QtFontFamily::count, d, QFontDatabasePrivate::family(), QtFontFamily::foundries, QString::isEmpty(), j, load(), parseFontName(), s, QtFontFoundry::style(), QFont::StyleItalic, and ucstricmp().

Referenced by MainWindow::setupFontTree().

{
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    ::load(familyName);

    QtFontFoundry allStyles(foundryName);
    QtFontFamily *f = d->family(familyName);
    if (!f) return false;

    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() || ucstricmp(foundry->name, foundryName) == 0) {
            for (int k = 0; k < foundry->count; k++)
                allStyles.style(foundry->styles[k]->key, true);
        }
    }

    QtFontStyle::Key styleKey(style);
    QtFontStyle *s = allStyles.style(styleKey);
    return s && s->key.style == QFont::StyleItalic;
}

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bool QFontDatabase::bold	(	const QString &	family,
		const QString &	style
	)			const

Returns true if the font that has family family and style style is bold; otherwise returns false.

See also:

italic(), weight()

Definition at line 1883 of file qfontdatabase.cpp.

References QFont::Bold, QtFontFamily::count, d, QFontDatabasePrivate::family(), QtFontFamily::foundries, QString::isEmpty(), j, load(), parseFontName(), s, QtFontFoundry::style(), and ucstricmp().

{
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    ::load(familyName);

    QtFontFoundry allStyles(foundryName);
    QtFontFamily *f = d->family(familyName);
    if (!f) return false;

    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() ||
             ucstricmp(foundry->name, foundryName) == 0) {
            for (int k = 0; k < foundry->count; k++)
                allStyles.style(foundry->styles[k]->key, true);
        }
    }

    QtFontStyle::Key styleKey(style);
    QtFontStyle *s = allStyles.style(styleKey);
    return s && s->key.weight >= QFont::Bold;
}

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int QFontDatabase::weight	(	const QString &	family,
		const QString &	style
	)			const

Returns the weight of the font that has family family and style style. If there is no such family and style combination, returns -1.

See also:

italic(), bold()

Definition at line 1917 of file qfontdatabase.cpp.

References QtFontFamily::count, d, QFontDatabasePrivate::family(), QtFontFamily::foundries, QString::isEmpty(), j, load(), parseFontName(), s, QtFontFoundry::style(), and ucstricmp().

Referenced by MainWindow::setupFontTree().

{
    QString familyName, foundryName;
    parseFontName(family, foundryName, familyName);

    ::load(familyName);

    QtFontFoundry allStyles(foundryName);
    QtFontFamily *f = d->family(familyName);
    if (!f) return -1;

    for (int j = 0; j < f->count; j++) {
        QtFontFoundry *foundry = f->foundries[j];
        if (foundryName.isEmpty() ||
             ucstricmp(foundry->name, foundryName) == 0) {
            for (int k = 0; k < foundry->count; k++)
                allStyles.style(foundry->styles[k]->key, true);
        }
    }

    QtFontStyle::Key styleKey(style);
    QtFontStyle *s = allStyles.style(styleKey);
    return s ? s->key.weight : -1;
}

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QString QFontDatabase::writingSystemName

(

WritingSystem

writingSystem

)

[static]

Returns the names the writingSystem (e.g. for displaying to the user in a dialog).

Definition at line 1948 of file qfontdatabase.cpp.

References Any, Arabic, Armenian, Bengali, Cyrillic, Devanagari, QString::fromLatin1(), Georgian, Greek, Gujarati, Gurmukhi, Hebrew, Japanese, Kannada, Khmer, Korean, Lao, Latin, Malayalam, Myanmar, name, Ogham, Oriya, qApp, Runic, SimplifiedChinese, Sinhala, Syriac, Tamil, Telugu, Thaana, Thai, Tibetan, TraditionalChinese, and Vietnamese.

Referenced by initializeDb(), and QFontDialog::QFontDialog().

{
    const char *name = 0;
    switch (writingSystem) {
    case Any:
        name = "Any";
        break;
    case Latin:
        name = "Latin";
        break;
    case Greek:
        name = "Greek";
        break;
    case Cyrillic:
        name = "Cyrillic";
        break;
    case Armenian:
        name = "Armenian";
        break;
    case Hebrew:
        name = "Hebrew";
        break;
    case Arabic:
        name = "Arabic";
        break;
    case Syriac:
        name = "Syriac";
        break;
    case Thaana:
        name = "Thaana";
        break;
    case Devanagari:
        name = "Devanagari";
        break;
    case Bengali:
        name = "Bengali";
        break;
    case Gurmukhi:
        name = "Gurmukhi";
        break;
    case Gujarati:
        name = "Gujarati";
        break;
    case Oriya:
        name = "Oriya";
        break;
    case Tamil:
        name = "Tamil";
        break;
    case Telugu:
        name = "Telugu";
        break;
    case Kannada:
        name = "Kannada";
        break;
    case Malayalam:
        name = "Malayalam";
        break;
    case Sinhala:
        name = "Sinhala";
        break;
    case Thai:
        name = "Thai";
        break;
    case Lao:
        name = "Lao";
        break;
    case Tibetan:
        name = "Tibetan";
        break;
    case Myanmar:
        name = "Myanmar";
        break;
    case Georgian:
        name = "Georgian";
        break;
    case Khmer:
        name = "Khmer";
        break;
    case SimplifiedChinese:
        name = "Simplified Chinese";
        break;
    case TraditionalChinese:
        name = "Traditional Chinese";
        break;
    case Japanese:
        name = "Japanese";
        break;
    case Korean:
        name = "Korean";
        break;
    case Vietnamese:
        name = "Vietnamese";
        break;
    case Symbol:
        name = "Symbol";
        break;
    case Ogham:
        name = "Ogham";
        break;
    case Runic:
        name = "Runic";
        break;
    default:
        Q_ASSERT_X(false, "QFontDatabase::writingSystemName", "invalid 'writingSystem' parameter");
        break;
    }
    return qApp ? qApp->translate("QFont", name) : QString::fromLatin1(name);
}

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QString QFontDatabase::writingSystemSample

(

WritingSystem

writingSystem

)

[static]

Returns a string with sample characters from writingSystem.

Definition at line 2062 of file qfontdatabase.cpp.

References Any, Arabic, Armenian, Bengali, Cyrillic, Devanagari, Georgian, Greek, Gujarati, Gurmukhi, Hebrew, Japanese, Kannada, Khmer, Korean, Lao, Latin, Malayalam, Myanmar, Ogham, Oriya, Runic, SimplifiedChinese, Sinhala, Syriac, Tamil, Telugu, Thaana, Thai, Tibetan, TraditionalChinese, and Vietnamese.

Referenced by QFontDialogPrivate::_q_writingSystemHighlighted().

{
    QString sample;
    switch (writingSystem) {
    case Any:
    case Symbol:
        // show only ascii characters
        sample += QLatin1String("AaBbzZ");
        break;
    case Latin:
        // This is cheating... we only show latin-1 characters so that we don't
        // end up loading lots of fonts - at least on X11...
        sample = QLatin1String("Aa");
        sample += QChar(0x00C3);
        sample += QChar(0x00E1);
        sample += QLatin1String("Zz");
        break;
    case Greek:
        sample += QChar(0x0393);
        sample += QChar(0x03B1);
        sample += QChar(0x03A9);
        sample += QChar(0x03C9);
        break;
    case Cyrillic:
        sample += QChar(0x0414);
        sample += QChar(0x0434);
        sample += QChar(0x0436);
        sample += QChar(0x0402);
        break;
    case Armenian:
        sample += QChar(0x053f);
        sample += QChar(0x054f);
        sample += QChar(0x056f);
        sample += QChar(0x057f);
        break;
    case Hebrew:
        sample += QChar(0x05D0);
        sample += QChar(0x05D1);
        sample += QChar(0x05D2);
        sample += QChar(0x05D3);
        break;
    case Arabic:
        sample += QChar(0x0628);
        sample += QChar(0x0629);
        sample += QChar(0x062A);
        sample += QChar(0x063A);
        break;
    case Syriac:
        sample += QChar(0x0715);
        sample += QChar(0x0725);
        sample += QChar(0x0716);
        sample += QChar(0x0726);
        break;
    case Thaana:
        sample += QChar(0x0784);
        sample += QChar(0x0794);
        sample += QChar(0x078c);
        sample += QChar(0x078d);
        break;
    case Devanagari:
        sample += QChar(0x0905);
        sample += QChar(0x0915);
        sample += QChar(0x0925);
        sample += QChar(0x0935);
        break;
    case Bengali:
        sample += QChar(0x0986);
        sample += QChar(0x0996);
        sample += QChar(0x09a6);
        sample += QChar(0x09b6);
        break;
    case Gurmukhi:
        sample += QChar(0x0a05);
        sample += QChar(0x0a15);
        sample += QChar(0x0a25);
        sample += QChar(0x0a35);
        break;
    case Gujarati:
        sample += QChar(0x0a85);
        sample += QChar(0x0a95);
        sample += QChar(0x0aa5);
        sample += QChar(0x0ab5);
        break;
    case Oriya:
        sample += QChar(0x0b06);
        sample += QChar(0x0b16);
        sample += QChar(0x0b2b);
        sample += QChar(0x0b36);
        break;
    case Tamil:
        sample += QChar(0x0b89);
        sample += QChar(0x0b99);
        sample += QChar(0x0ba9);
        sample += QChar(0x0bb9);
        break;
    case Telugu:
        sample += QChar(0x0c05);
        sample += QChar(0x0c15);
        sample += QChar(0x0c25);
        sample += QChar(0x0c35);
        break;
    case Kannada:
        sample += QChar(0x0c85);
        sample += QChar(0x0c95);
        sample += QChar(0x0ca5);
        sample += QChar(0x0cb5);
        break;
    case Malayalam:
        sample += QChar(0x0d05);
        sample += QChar(0x0d15);
        sample += QChar(0x0d25);
        sample += QChar(0x0d35);
        break;
    case Sinhala:
        sample += QChar(0x0d90);
        sample += QChar(0x0da0);
        sample += QChar(0x0db0);
        sample += QChar(0x0dc0);
        break;
    case Thai:
        sample += QChar(0x0e02);
        sample += QChar(0x0e12);
        sample += QChar(0x0e22);
        sample += QChar(0x0e32);
        break;
    case Lao:
        sample += QChar(0x0e8d);
        sample += QChar(0x0e9d);
        sample += QChar(0x0ead);
        sample += QChar(0x0ebd);
        break;
    case Tibetan:
        sample += QChar(0x0f00);
        sample += QChar(0x0f01);
        sample += QChar(0x0f02);
        sample += QChar(0x0f03);
        break;
    case Myanmar:
        sample += QChar(0x1000);
        sample += QChar(0x1001);
        sample += QChar(0x1002);
        sample += QChar(0x1003);
        break;
    case Georgian:
        sample += QChar(0x10a0);
        sample += QChar(0x10b0);
        sample += QChar(0x10c0);
        sample += QChar(0x10d0);
        break;
    case Khmer:
        sample += QChar(0x1780);
        sample += QChar(0x1790);
        sample += QChar(0x17b0);
        sample += QChar(0x17c0);
        break;
    case SimplifiedChinese:
        sample += QChar(0x4e2d);
        sample += QChar(0x6587);
        sample += QChar(0x8303);
        sample += QChar(0x4f8b);
        break;
    case TraditionalChinese:
        sample += QChar(0x4e2d);
        sample += QChar(0x6587);
        sample += QChar(0x7bc4);
        sample += QChar(0x4f8b);
        break;
    case Japanese:
        sample += QChar(0x3050);
        sample += QChar(0x3060);
        sample += QChar(0x30b0);
        sample += QChar(0x30c0);
        break;
    case Korean:
        sample += QChar(0xac00);
        sample += QChar(0xac11);
        sample += QChar(0xac1a);
        sample += QChar(0xac2f);
        break;
    case Vietnamese:
        break;
    case Ogham:
        sample += QChar(0x1681);
        sample += QChar(0x1682);
        sample += QChar(0x1683);
        sample += QChar(0x1684);
        break;
    case Runic:
        sample += QChar(0x16a0);
        sample += QChar(0x16a1);
        sample += QChar(0x16a2);
        sample += QChar(0x16a3);
        break;
    default:
        break;
    }
    return sample;
}

int QFontDatabase::addApplicationFont

(

const QString &

fileName

)

[static]

Since:

4.2

Loads the font from the file specified by fileName and makes it available to the application. An ID is returned that can be used to remove the font again with removeApplicationFont() or to retrieve the list of family names contained in the font.

The function returns -1 if the font could not be loaded.

Currently only TrueType fonts and TrueType font collections are supported.

{Note:} Adding application fonts on Unix/X11 platforms without fontconfig is currently not supported.

See also:

addApplicationFontFromData(), applicationFontFamilies(), removeApplicationFont()

Definition at line 2315 of file qfontdatabase.cpp.

References data, QFile::fileEngine(), QAbstractFileEngine::fileFlags(), QAbstractFileEngine::FlagsMask, QAbstractFileEngine::LocalDiskFlag, QFile::open(), QIODevice::readAll(), and QIODevice::ReadOnly.

{
    QByteArray data;
    QFile f(fileName);
    if (!(f.fileEngine()->fileFlags(QAbstractFileEngine::FlagsMask) & QAbstractFileEngine::LocalDiskFlag)) {
        if (!f.open(QIODevice::ReadOnly))
            return -1;
        data = f.readAll();
    }
    return privateDb()->addAppFont(data, fileName);
}

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int QFontDatabase::addApplicationFontFromData

(

const QByteArray &

fontData

)

[static]

Since:

4.2

Loads the font from binary data specified by fontData and makes it available to the application. An ID is returned that can be used to remove the font again with removeApplicationFont() or to retrieve the list of family names contained in the font.

The function returns -1 if the font could not be loaded.

Currently only TrueType fonts and TrueType font collections are supported.

{Note:} Adding application fonts on Unix/X11 platforms without fontconfig is currently not supported.

See also:

addApplicationFont(), applicationFontFamilies(), removeApplicationFont()

Definition at line 2344 of file qfontdatabase.cpp.

{
    return privateDb()->addAppFont(fontData, QString() /* fileName */);
}

QStringList QFontDatabase::applicationFontFamilies

(

int

id

)

[static]

Since:

4.2

Returns a list of font families for the given application font identified by id.

See also:

addApplicationFont(), addApplicationFontFromData()

Definition at line 2357 of file qfontdatabase.cpp.

References QList< T >::value().

{
    return privateDb()->applicationFonts.value(id).families;
}

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bool QFontDatabase::removeApplicationFont

(

int

id

)

[static]

Since:

4.2

Removes the previously loaded application font identified by id. Returns true if unloading of the font succeeded; otherwise returns false.

See also:

removeAllApplicationFonts(), addApplicationFont(), addApplicationFontFromData()

Definition at line 1950 of file qfontdatabase_x11.cpp.

References QFontDatabasePrivate::applicationFonts, QFontDatabasePrivate::invalidate(), and QFontDatabasePrivate::reregisterAppFonts.

{
#if defined(QT_NO_FONTCONFIG)
    return false;
#else
    QFontDatabasePrivate *db = privateDb();
    if (handle < 0 || handle >= db->applicationFonts.count())
        return false;

    FcConfigAppFontClear(0);

    db->applicationFonts[handle] = QFontDatabasePrivate::ApplicationFont();

    db->reregisterAppFonts = true;
    db->invalidate();
    return true;
#endif
}

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bool QFontDatabase::removeAllApplicationFonts

(

)

[static]

Since:

4.2

Removes all application-local fonts previously added using addApplicationFont() and addApplicationFontFromData().

Returns true if unloading of the fonts succeeded; otherwise returns false.

See also:

removeApplicationFont(), addApplicationFont(), addApplicationFontFromData()

Definition at line 1969 of file qfontdatabase_x11.cpp.

References QFontDatabasePrivate::applicationFonts, and QFontDatabasePrivate::invalidate().

{
#if defined(QT_NO_FONTCONFIG)
    return false;
#else
    QFontDatabasePrivate *db = privateDb();
    if (db->applicationFonts.isEmpty())
        return false;

    FcConfigAppFontClear(0);
    db->applicationFonts.clear();
    db->invalidate();
    return true;
#endif
}

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void QFontDatabase::createDatabase

(

)

[static, private]

Definition at line 2267 of file qfontdatabase.cpp.

References initializeDb().

Referenced by QFontDatabase().

{ initializeDb(); }

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void QFontDatabase::parseFontName	(	const QString &	name,
		QString &	foundry,
		QString &	family
	)			[static, private]

Definition at line 2262 of file qfontdatabase.cpp.

References name.

Referenced by bold(), QFontDef::exactMatch(), font(), isBitmapScalable(), isFixedPitch(), isSmoothlyScalable(), italic(), pointSizes(), smoothSizes(), styles(), QFontDialog::updateFamilies(), weight(), and writingSystems().

{
    ::parseFontName(name, foundry, family);
}

static QFontEngine* QFontDatabase::findFont	(	int	script,
		const QFontPrivate *	fp,
		const QFontDef &	request,
		int	force_encoding_id = -1
	)			[static, private]

---

Friends And Related Function Documentation

friend struct QFontDef [friend]

Definition at line 140 of file qfontdatabase.h.

friend class QFontPrivate [friend]

Definition at line 141 of file qfontdatabase.h.

friend class QFontDialog [friend]

Definition at line 142 of file qfontdatabase.h.

friend class QFontEngineMultiXLFD [friend]

Definition at line 143 of file qfontdatabase.h.

---

Member Data Documentation

QFontDatabasePrivate* QFontDatabase::d [private]

Definition at line 145 of file qfontdatabase.h.

Referenced by bold(), families(), font(), isBitmapScalable(), isFixedPitch(), isSmoothlyScalable(), italic(), pointSizes(), QFontDatabase(), smoothSizes(), styles(), weight(), and writingSystems().

---

The documentation for this class was generated from the following files:

• src/gui/text/qfontdatabase.h
• src/gui/text/qfontdatabase.cpp
• src/gui/text/qfontdatabase_x11.cpp

---