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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/src/kernel/qfontdatabase.cpp:714 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>QFontDatabase Class</title><style type="text/css"><!--h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; }a:link { color: #004faf; text-decoration: none }a:visited { color: #672967; text-decoration: none }body { background: #ffffff; color: black; }--></style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr bgcolor="#E5E5E5"><td valign=center> <a href="index.html"><font color="#004faf">Home</font></a> | <a href="classes.html"><font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"><font color="#004faf">Main Classes</font></a> | <a href="annotated.html"><font color="#004faf">Annotated</font></a> | <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"><font color="#004faf">Functions</font></a></td><td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QFontDatabase Class Reference</h1><p>The QFontDatabase class provides information about the fonts available in the underlying window system.<a href="#details">More...</a><p><tt>#include <<a href="qfontdatabase-h.html">qfontdatabase.h</a>></tt><p><a href="qfontdatabase-members.html">List of all member functions.</a><h2>Public Members</h2><ul><li><div class=fn><a href="#QFontDatabase"><b>QFontDatabase</b></a> ()</div></li><li><div class=fn>QStringList <a href="#families"><b>families</b></a> () const</div></li><li><div class=fn>QStringList <a href="#styles"><b>styles</b></a> ( const QString & family ) const</div></li><li><div class=fn>QValueList<int> <a href="#pointSizes"><b>pointSizes</b></a> ( const QString & family, const QString & style = QString::null )</div></li><li><div class=fn>QValueList<int> <a href="#smoothSizes"><b>smoothSizes</b></a> ( const QString & family, const QString & style )</div></li><li><div class=fn>QString <a href="#styleString"><b>styleString</b></a> ( const QFont & f )</div></li><li><div class=fn>QFont <a href="#font"><b>font</b></a> ( const QString & family, const QString & style, int pointSize )</div></li><li><div class=fn>bool <a href="#isBitmapScalable"><b>isBitmapScalable</b></a> ( const QString & family, const QString & style = QString::null ) const</div></li><li><div class=fn>bool <a href="#isSmoothlyScalable"><b>isSmoothlyScalable</b></a> ( const QString & family, const QString & style = QString::null ) const</div></li><li><div class=fn>bool <a href="#isScalable"><b>isScalable</b></a> ( const QString & family, const QString & style = QString::null ) const</div></li><li><div class=fn>bool <a href="#isFixedPitch"><b>isFixedPitch</b></a> ( const QString & family, const QString & style = QString::null ) const</div></li><li><div class=fn>bool <a href="#italic"><b>italic</b></a> ( const QString & family, const QString & style ) const</div></li><li><div class=fn>bool <a href="#bold"><b>bold</b></a> ( const QString & family, const QString & style ) const</div></li><li><div class=fn>int <a href="#weight"><b>weight</b></a> ( const QString & family, const QString & style ) const</div></li><li><div class=fn>QStringList families ( bool ) const <em>(obsolete)</em></div></li><li><div class=fn>QStringList styles ( const QString & family, const QString & ) const <em>(obsolete)</em></div></li><li><div class=fn>QValueList<int> pointSizes ( const QString & family, const QString & style, const QString & ) <em>(obsolete)</em></div></li><li><div class=fn>QValueList<int> smoothSizes ( const QString & family, const QString & style, const QString & ) <em>(obsolete)</em></div></li><li><div class=fn>QFont font ( const QString & familyName, const QString & style, int pointSize, const QString & ) <em>(obsolete)</em></div></li><li><div class=fn>bool isBitmapScalable ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></div></li><li><div class=fn>bool isSmoothlyScalable ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></div></li><li><div class=fn>bool isScalable ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></div></li><li><div class=fn>bool isFixedPitch ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></div></li><li><div class=fn>bool italic ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></div></li><li><div class=fn>bool bold ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></div></li><li><div class=fn>int weight ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></div></li></ul><h2>Static Public Members</h2><ul><li><div class=fn>QValueList<int> <a href="#standardSizes"><b>standardSizes</b></a> ()</div></li><li><div class=fn>QString <a href="#scriptName"><b>scriptName</b></a> ( QFont::Script script )</div></li><li><div class=fn>QString <a href="#scriptSample"><b>scriptSample</b></a> ( QFont::Script script )</div></li></ul><hr><a name="details"></a><h2>Detailed Description</h2>The QFontDatabase class provides information about the fonts available in the underlying window system.<p> <p> The most common uses of this class are to query the database forthe list of font <a href="#families">families</a>() and for the <a href="#pointSizes">pointSizes</a>() and <a href="#styles">styles</a>()that are available for each family. An alternative to pointSizes()is <a href="#smoothSizes">smoothSizes</a>() which returns the sizes at which a given familyand style will look attractive.<p> If the font family is available from two or more foundries thefoundry name is included in the family name, e.g. "Helvetica[Adobe]" and "Helvetica [Cronyx]". When you specify a family youcan 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 afoundry it is always returned, e.g. by families(), using thebracketed format.<p> The <a href="#font">font</a>() function returns a <a href="qfont.html">QFont</a> given a family, style andpoint size.<p> A family and style combination can be checked to see if it is<a href="#italic">italic</a>() or <a href="#bold">bold</a>(), and to retrieve its <a href="#weight">weight</a>(). Similarly we cancall <a href="#isBitmapScalable">isBitmapScalable</a>(), <a href="#isSmoothlyScalable">isSmoothlyScalable</a>(), <a href="#isScalable">isScalable</a>() and<a href="#isFixedPitch">isFixedPitch</a>().<p> A text version of a style is given by <a href="#styleString">styleString</a>().<p> The QFontDatabase class also supports some static functions, forexample, <a href="#standardSizes">standardSizes</a>(). You can retrieve the Unicode 3.0description of a <a href="qfont.html#Script-enum">script</a> using<a href="#scriptName">scriptName</a>(), and a sample of characters in a script with<a href="#scriptSample">scriptSample</a>().<p> Example:<pre>#include <<a href="qapplication-h.html">qapplication.h</a>>#include <<a href="qfontdatabase-h.html">qfontdatabase.h</a>>int main( int argc, char **argv ){ <a href="qapplication.html">QApplication</a> app( argc, argv ); QFontDatabase fdb; <a href="qstringlist.html">QStringList</a> families = fdb.<a href="#families">families</a>(); for ( QStringList::Iterator f = families.<a href="qvaluelist.html#begin">begin</a>(); f != families.<a href="qvaluelist.html#end">end</a>(); ++f ) { <a href="qstring.html">QString</a> family = *f; <a href="qapplication.html#qDebug">qDebug</a>( family ); <a href="qstringlist.html">QStringList</a> styles = fdb.<a href="#styles">styles</a>( family ); for ( QStringList::Iterator s = styles.<a href="qvaluelist.html#begin">begin</a>(); s != styles.<a href="qvaluelist.html#end">end</a>(); ++s ) { <a href="qstring.html">QString</a> style = *s; <a href="qstring.html">QString</a> dstyle = "\t" + style + " ("; <a href="qvaluelist.html">QValueList</a><int> smoothies = fdb.<a href="#smoothSizes">smoothSizes</a>( family, style ); for ( QValueList<int>::Iterator points = smoothies.<a href="qvaluelist.html#begin">begin</a>(); points != smoothies.<a href="qvaluelist.html#end">end</a>(); ++points ) { dstyle += QString::<a href="qstring.html#number">number</a>( *points ) + " "; } dstyle = dstyle.<a href="qstring.html#left">left</a>( dstyle.<a href="qstring.html#length">length</a>() - 1 ) + ")"; <a href="qapplication.html#qDebug">qDebug</a>( dstyle ); } } return 0;}</pre> This example gets the list of font families, then the list ofstyles for each family and the point sizes that are available foreach family/style combination.<p>See also <a href="environment.html">Environment Classes</a> and <a href="graphics.html">Graphics Classes</a>.<hr><h2>Member Function Documentation</h2><h3 class=fn><a name="QFontDatabase"></a>QFontDatabase::QFontDatabase ()</h3>Creates a font database object.<h3 class=fn>bool <a name="bold"></a>QFontDatabase::bold ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style ) const</h3>Returns TRUE if the font that has family <em>family</em> and style <em>style</em> is bold; otherwise returns FALSE.<p> <p>See also <a href="#italic">italic</a>() and <a href="#weight">weight</a>().<h3 class=fn>bool <a name="bold-2"></a>QFontDatabase::bold ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style, const <a href="qstring.html">QString</a> & ) const</h3><b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.<p> <h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="families"></a>QFontDatabase::families () const</h3>Returns a list of the names of the available font families.<p> If a family exists in several foundries, the returned name for⌨️ 快捷键说明
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