QFontDatabase(3qt)QFontDatabase(3qt)NAME
QFontDatabase - Information about the fonts available in the underlying
window system
SYNOPSIS
#include <qfontdatabase.h>
Public Members
QFontDatabase ()
QStringList families () const
QStringList families ( QFont::Script script ) const
QStringList styles ( const QString & family ) const
QValueList<int> pointSizes ( const QString & family, const QString &
style = QString::null )
QValueList<int> smoothSizes ( const QString & family, const QString &
style )
QString styleString ( const QFont & f )
QFont font ( const QString & family, const QString & style, int
pointSize )
bool isBitmapScalable ( const QString & family, const QString & style =
QString::null ) const
bool isSmoothlyScalable ( const QString & family, const QString & style
= QString::null ) const
bool isScalable ( const QString & family, const QString & style =
QString::null ) const
bool isFixedPitch ( const QString & family, const QString & style =
QString::null ) 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
QStringList families ( bool ) const (obsolete)
QStringList styles ( const QString & family, const QString & ) const
(obsolete)
QValueList<int> pointSizes ( const QString & family, const QString &
style, const QString & ) (obsolete)
QValueList<int> smoothSizes ( const QString & family, const QString &
style, const QString & ) (obsolete)
QFont font ( const QString & familyName, const QString & style, int
pointSize, const QString & ) (obsolete)
bool isBitmapScalable ( const QString & family, const QString & style,
const QString & ) const (obsolete)
bool isSmoothlyScalable ( const QString & family, const QString &
style, const QString & ) const (obsolete)
bool isScalable ( const QString & family, const QString & style, const
QString & ) const (obsolete)
bool isFixedPitch ( const QString & family, const QString & style,
const QString & ) const (obsolete)
bool italic ( const QString & family, const QString & style, const
QString & ) const (obsolete)
bool bold ( const QString & family, const QString & style, const
QString & ) const (obsolete)
int weight ( const QString & family, const QString & style, const
QString & ) const (obsolete)
Static Public Members
QValueList<int> standardSizes ()
QString scriptName ( QFont::Script script )
QString scriptSample ( QFont::Script script )
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().
A text version of a style is given by styleString().
The QFontDatabase class also supports some static functions, for
example, standardSizes(). You can retrieve the Unicode 3.0 description
of a script using scriptName(), and a sample of characters in a script
with scriptSample().
Example:
#include <qapplication.h>
#include <qfontdatabase.h>
#include <else.h>
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QFontDatabase fdb;
QStringList families = fdb.families();
for ( QStringList::Iterator f = families.begin(); f != families.end(); ++f ) {
QString family = *f;
qDebug( family );
QStringList styles = fdb.styles( family );
for ( QStringList::Iterator s = styles.begin(); s != styles.end(); ++s ) {
QString style = *s;
QString dstyle = "\t" + style + " (";
QValueList<int> smoothies = fdb.smoothSizes( family, style );
for ( QValueList<int>::Iterator points = smoothies.begin();
points != smoothies.end(); ++points ) {
dstyle += QString::number( *points ) + " ";
}
dstyle = dstyle.left( dstyle.length() - 1 ) + ")";
qDebug( dstyle );
}
}
return 0;
}
This example gets the list of font families, then the list of styles
for each family and the point sizes that are available for each
family/style combination.
See also Environment Classes and Graphics Classes.
MEMBER FUNCTION DOCUMENTATIONQFontDatabase::QFontDatabase ()
Creates a font database object.
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() and weight().
bool QFontDatabase::bold ( const QString & family, const QString & style,
const QString & ) const
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
QStringList QFontDatabase::families () const
Returns a sorted list of the names of the available font families.
If a family exists in several foundries, the returned name for that
font is in the form "family [foundry]". Examples: [Adobe]", "Times
[Cronyx]", "Palatino".
QStringList QFontDatabase::families ( QFont::Script script ) const
This is an overloaded member function, provided for convenience. It
behaves essentially like the above function.
Returns a sorted list of the available font families which support the
Unicode script script.
If a family exists in several foundries, the returned name for that
font is in the form "family [foundry]". Examples: [Adobe]", "Times
[Cronyx]", "Palatino".
QStringList QFontDatabase::families ( bool ) const
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
QFont QFontDatabase::font ( const QString & family, const QString & style, int
pointSize )
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.
QFont QFontDatabase::font ( const QString & familyName, const QString & style,
int pointSize, const QString & )
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
bool QFontDatabase::isBitmapScalable ( const QString & family, const QString &
style = QString::null ) 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() and isSmoothlyScalable().
bool QFontDatabase::isBitmapScalable ( const QString & family, const QString &
style, const QString & ) const
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
bool QFontDatabase::isFixedPitch ( const QString & family, const QString &
style = QString::null ) const
Returns TRUE if the font that has family family and style style is
fixed pitch; otherwise returns FALSE.
bool QFontDatabase::isFixedPitch ( const QString & family, const QString &
style, const QString & ) const
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
bool QFontDatabase::isScalable ( const QString & family, const QString & style
= QString::null ) const
Returns TRUE if the font that has family family and style style is
scalable; otherwise returns FALSE.
See also isBitmapScalable() and isSmoothlyScalable().
bool QFontDatabase::isScalable ( const QString & family, const QString &
style, const QString & ) const
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
bool QFontDatabase::isSmoothlyScalable ( const QString & family, const QString
& style = QString::null ) 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() and isBitmapScalable().
bool QFontDatabase::isSmoothlyScalable ( const QString & family, const QString
& style, const QString & ) const
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
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() and bold().
bool QFontDatabase::italic ( const QString & family, const QString & style,
const QString & ) const
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
QValueList<;int> QFontDatabase::pointSizes ( const QString & family, const
QString & style = QString::null )
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() and standardSizes().
QValueList<;int> QFontDatabase::pointSizes ( const QString & family, const
QString & style, const QString & )
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
QString QFontDatabase::scriptName ( QFont::Script script ) [static]
Returns a string that gives a default description of the script (e.g.
for displaying to the user in a dialog). The name matches the name of
the script as defined by the Unicode 3.0 standard.
See also QFont::Script.
QString QFontDatabase::scriptSample ( QFont::Script script ) [static]
Returns a string with sample characters from script.
See also QFont::Script.
QValueList<;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() and standardSizes().
QValueList<;int> QFontDatabase::smoothSizes ( const QString & family, const
QString & style, const QString & )
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
QValueList<;int> QFontDatabase::standardSizes () [static]
Returns a list of standard font sizes.
See also smoothSizes() and pointSizes().
QString QFontDatabase::styleString ( const QFont & f )
Returns a string that describes the style of the font f. For example,
"Bold Italic", "Bold", "Italic" or "Normal". An empty string may be
returned.
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.
QStringList QFontDatabase::styles ( const QString & family, const QString & )
const
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
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() and bold().
int QFontDatabase::weight ( const QString & family, const QString & style,
const QString & ) const
This function is obsolete. It is provided to keep old source working.
We strongly advise against using it in new code.
SEE ALSO
http://doc.trolltech.com/qfontdatabase.html
http://www.trolltech.com/faq/tech.html
COPYRIGHT
Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com. See the
license file included in the distribution for a complete license
statement.
AUTHOR
Generated automatically from the source code.
BUGS
If you find a bug in Qt, please report it as described in
http://doc.trolltech.com/bughowto.html. Good bug reports help us to
help you. Thank you.
The definitive Qt documentation is provided in HTML format; it is
located at $QTDIR/doc/html and can be read using Qt Assistant or with a
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who prefer man pages, although this format is not officially supported
by Trolltech.
If you find errors in this manual page, please report them to qt-
bugs@trolltech.com. Please include the name of the manual page
(qfontdatabase.3qt) and the Qt version (3.3.8).
Trolltech AS 2 February 2007 QFontDatabase(3qt)
