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323 lines
23 KiB
323 lines
23 KiB
14 years ago
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qfontdatabase.cpp:1286 -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>QFontDatabase Class</title>
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Functions</font></a>
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<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>
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<p>The QFontDatabase class provides information about the fonts available in the underlying window system.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qfontdatabase-h.html">qfontdatabase.h</a>></tt>
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<p><a href="qfontdatabase-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#QFontDatabase"><b>QFontDatabase</b></a> ()</li>
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<li class=fn>QStringList <a href="#families"><b>families</b></a> () const</li>
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<li class=fn>QStringList <a href="#families-2"><b>families</b></a> ( QFont::Script script ) const</li>
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<li class=fn>QStringList <a href="#styles"><b>styles</b></a> ( const QString & family ) const</li>
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<li class=fn>QValueList<int> <a href="#pointSizes"><b>pointSizes</b></a> ( const QString & family, const QString & style = QString::null )</li>
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<li class=fn>QValueList<int> <a href="#smoothSizes"><b>smoothSizes</b></a> ( const QString & family, const QString & style )</li>
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<li class=fn>QString <a href="#styleString"><b>styleString</b></a> ( const QFont & f )</li>
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<li class=fn>QFont <a href="#font"><b>font</b></a> ( const QString & family, const QString & style, int pointSize )</li>
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<li class=fn>bool <a href="#isBitmapScalable"><b>isBitmapScalable</b></a> ( const QString & family, const QString & style = QString::null ) const</li>
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<li class=fn>bool <a href="#isSmoothlyScalable"><b>isSmoothlyScalable</b></a> ( const QString & family, const QString & style = QString::null ) const</li>
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<li class=fn>bool <a href="#isScalable"><b>isScalable</b></a> ( const QString & family, const QString & style = QString::null ) const</li>
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<li class=fn>bool <a href="#isFixedPitch"><b>isFixedPitch</b></a> ( const QString & family, const QString & style = QString::null ) const</li>
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<li class=fn>bool <a href="#italic"><b>italic</b></a> ( const QString & family, const QString & style ) const</li>
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<li class=fn>bool <a href="#bold"><b>bold</b></a> ( const QString & family, const QString & style ) const</li>
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<li class=fn>int <a href="#weight"><b>weight</b></a> ( const QString & family, const QString & style ) const</li>
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<li class=fn>QStringList families ( bool ) const <em>(obsolete)</em></li>
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<li class=fn>QStringList styles ( const QString & family, const QString & ) const <em>(obsolete)</em></li>
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<li class=fn>QValueList<int> pointSizes ( const QString & family, const QString & style, const QString & ) <em>(obsolete)</em></li>
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<li class=fn>QValueList<int> smoothSizes ( const QString & family, const QString & style, const QString & ) <em>(obsolete)</em></li>
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<li class=fn>QFont font ( const QString & familyName, const QString & style, int pointSize, const QString & ) <em>(obsolete)</em></li>
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<li class=fn>bool isBitmapScalable ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></li>
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<li class=fn>bool isSmoothlyScalable ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></li>
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<li class=fn>bool isScalable ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></li>
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<li class=fn>bool isFixedPitch ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></li>
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<li class=fn>bool italic ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></li>
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<li class=fn>bool bold ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></li>
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<li class=fn>int weight ( const QString & family, const QString & style, const QString & ) const <em>(obsolete)</em></li>
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</ul>
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<h2>Static Public Members</h2>
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<ul>
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<li class=fn>QValueList<int> <a href="#standardSizes"><b>standardSizes</b></a> ()</li>
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<li class=fn>QString <a href="#scriptName"><b>scriptName</b></a> ( QFont::Script script )</li>
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<li class=fn>QString <a href="#scriptSample"><b>scriptSample</b></a> ( QFont::Script script )</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The QFontDatabase class provides information about the fonts available in the underlying window system.
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<p>
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<p> The most common uses of this class are to query the database for
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the list of font <a href="#families">families</a>() and for the <a href="#pointSizes">pointSizes</a>() and <a href="#styles">styles</a>()
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that are available for each family. An alternative to pointSizes()
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is <a href="#smoothSizes">smoothSizes</a>() which returns the sizes at which a given family
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and style will look attractive.
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<p> If the font family is available from two or more foundries the
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foundry name is included in the family name, e.g. "Helvetica
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[Adobe]" and "Helvetica [Cronyx]". When you specify a family you
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can either use the old hyphenated Qt 2.x "foundry-family" format,
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e.g. "Cronyx-Helvetica", or the new bracketed Qt 3.x "family
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[foundry]" format e.g. "Helvetica [Cronyx]". If the family has a
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foundry it is always returned, e.g. by families(), using the
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bracketed format.
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<p> The <a href="#font">font</a>() function returns a <a href="qfont.html">QFont</a> given a family, style and
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point size.
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<p> A family and style combination can be checked to see if it is
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<a href="#italic">italic</a>() or <a href="#bold">bold</a>(), and to retrieve its <a href="#weight">weight</a>(). Similarly we can
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call <a href="#isBitmapScalable">isBitmapScalable</a>(), <a href="#isSmoothlyScalable">isSmoothlyScalable</a>(), <a href="#isScalable">isScalable</a>() and
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<a href="#isFixedPitch">isFixedPitch</a>().
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<p> A text version of a style is given by <a href="#styleString">styleString</a>().
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<p> The QFontDatabase class also supports some static functions, for
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example, <a href="#standardSizes">standardSizes</a>(). You can retrieve the Unicode 3.0
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description of a <a href="qfont.html#Script-enum">script</a> using
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<a href="#scriptName">scriptName</a>(), and a sample of characters in a script with
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<a href="#scriptSample">scriptSample</a>().
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<p> Example:
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<pre>
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#include <<a href="qapplication-h.html">qapplication.h</a>>
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#include <<a href="qfontdatabase-h.html">qfontdatabase.h</a>>
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#include <else.h>
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int main( int argc, char **argv )
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{
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<a href="qapplication.html">QApplication</a> app( argc, argv );
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QFontDatabase fdb;
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<a href="qstringlist.html">QStringList</a> families = fdb.<a href="#families">families</a>();
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for ( QStringList::Iterator f = families.<a href="qvaluelist.html#begin">begin</a>(); f != families.<a href="qvaluelist.html#end">end</a>(); ++f ) {
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<a href="qstring.html">QString</a> family = *f;
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<a href="qapplication.html#qDebug">qDebug</a>( family );
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<a href="qstringlist.html">QStringList</a> styles = fdb.<a href="#styles">styles</a>( family );
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for ( QStringList::Iterator s = styles.<a href="qvaluelist.html#begin">begin</a>(); s != styles.<a href="qvaluelist.html#end">end</a>(); ++s ) {
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<a href="qstring.html">QString</a> style = *s;
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<a href="qstring.html">QString</a> dstyle = "\t" + style + " (";
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<a href="qvaluelist.html">QValueList</a><int> smoothies = fdb.<a href="#smoothSizes">smoothSizes</a>( family, style );
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for ( QValueList<int>::Iterator points = smoothies.<a href="qvaluelist.html#begin">begin</a>();
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points != smoothies.<a href="qvaluelist.html#end">end</a>(); ++points ) {
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dstyle += QString::<a href="qstring.html#number">number</a>( *points ) + " ";
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}
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dstyle = dstyle.<a href="qstring.html#left">left</a>( dstyle.<a href="qstring.html#length">length</a>() - 1 ) + ")";
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<a href="qapplication.html#qDebug">qDebug</a>( dstyle );
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}
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}
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return 0;
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}
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</pre>
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This example gets the list of font families, then the list of
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styles for each family and the point sizes that are available for
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each family/style combination.
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<p>See also <a href="environment.html">Environment Classes</a> and <a href="graphics.html">Graphics Classes</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="QFontDatabase"></a>QFontDatabase::QFontDatabase ()
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</h3>
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Creates a font database object.
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<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
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</h3>
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Returns TRUE if the font that has family <em>family</em> and style <em>style</em> is bold; otherwise returns FALSE.
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<p> <p>See also <a href="#italic">italic</a>() and <a href="#weight">weight</a>().
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<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
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</h3>
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<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p>
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<h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="families"></a>QFontDatabase::families () const
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</h3> Returns a sorted list of the names of the available font families.
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<p> If a family exists in several foundries, the returned name for
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that font is in the form "family [foundry]". Examples: "Times
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[Adobe]", "Times [Cronyx]", "Palatino".
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<h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="families-2"></a>QFontDatabase::families ( <a href="qfont.html#Script-enum">QFont::Script</a> script ) const
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Returns a sorted list of the available font families which support
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the Unicode script <em>script</em>.
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<p> If a family exists in several foundries, the returned name for
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that font is in the form "family [foundry]". Examples: "Times
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[Adobe]", "Times [Cronyx]", "Palatino".
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<h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="families-3"></a>QFontDatabase::families ( bool ) const
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</h3>
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<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p>
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<h3 class=fn><a href="qfont.html">QFont</a> <a name="font"></a>QFontDatabase::font ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style, int pointSize )
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</h3>
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Returns a <a href="qfont.html">QFont</a> object that has family <em>family</em>, style <em>style</em>
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and point size <em>pointSize</em>. If no matching font could be created,
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a QFont object that uses the application's default font is
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returned.
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<h3 class=fn><a href="qfont.html">QFont</a> <a name="font-2"></a>QFontDatabase::font ( const <a href="qstring.html">QString</a> & familyName, const <a href="qstring.html">QString</a> & style, int pointSize, const <a href="qstring.html">QString</a> & )
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</h3>
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<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p>
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<h3 class=fn>bool <a name="isBitmapScalable"></a>QFontDatabase::isBitmapScalable ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style = QString::null ) const
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</h3>
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Returns TRUE if the font that has family <em>family</em> and style <em>style</em> is a scalable bitmap font; otherwise returns FALSE. Scaling
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a bitmap font usually produces an unattractive hardly readable
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result, because the pixels of the font are scaled. If you need to
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scale a bitmap font it is better to scale it to one of the fixed
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sizes returned by <a href="#smoothSizes">smoothSizes</a>().
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<p> <p>See also <a href="#isScalable">isScalable</a>() and <a href="#isSmoothlyScalable">isSmoothlyScalable</a>().
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<h3 class=fn>bool <a name="isBitmapScalable-2"></a>QFontDatabase::isBitmapScalable ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style, const <a href="qstring.html">QString</a> & ) const
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</h3>
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<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p>
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<h3 class=fn>bool <a name="isFixedPitch"></a>QFontDatabase::isFixedPitch ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style = QString::null ) const
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</h3>
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Returns TRUE if the font that has family <em>family</em> and style <em>style</em> is fixed pitch; otherwise returns FALSE.
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<h3 class=fn>bool <a name="isFixedPitch-2"></a>QFontDatabase::isFixedPitch ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style, const <a href="qstring.html">QString</a> & ) const
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</h3>
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<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p>
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<h3 class=fn>bool <a name="isScalable"></a>QFontDatabase::isScalable ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style = QString::null ) const
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</h3>
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Returns TRUE if the font that has family <em>family</em> and style <em>style</em> is scalable; otherwise returns FALSE.
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<p> <p>See also <a href="#isBitmapScalable">isBitmapScalable</a>() and <a href="#isSmoothlyScalable">isSmoothlyScalable</a>().
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<h3 class=fn>bool <a name="isScalable-2"></a>QFontDatabase::isScalable ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style, const <a href="qstring.html">QString</a> & ) const
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</h3>
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<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p>
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<h3 class=fn>bool <a name="isSmoothlyScalable"></a>QFontDatabase::isSmoothlyScalable ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style = QString::null ) const
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</h3>
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Returns TRUE if the font that has family <em>family</em> and style <em>style</em> is smoothly scalable; otherwise returns FALSE. If this
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function returns TRUE, it's safe to scale this font to any size,
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and the result will always look attractive.
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<p> <p>See also <a href="#isScalable">isScalable</a>() and <a href="#isBitmapScalable">isBitmapScalable</a>().
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<h3 class=fn>bool <a name="isSmoothlyScalable-2"></a>QFontDatabase::isSmoothlyScalable ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style, const <a href="qstring.html">QString</a> & ) const
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</h3>
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<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
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<p>
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<h3 class=fn>bool <a name="italic"></a>QFontDatabase::italic ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style ) const
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</h3>
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Returns TRUE if the font that has family <em>family</em> and style <em>style</em> is italic; otherwise returns FALSE.
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<p> <p>See also <a href="#weight">weight</a>() and <a href="#bold">bold</a>().
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||
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||
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<h3 class=fn>bool <a name="italic-2"></a>QFontDatabase::italic ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style, const <a href="qstring.html">QString</a> & ) const
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||
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|
</h3>
|
||
|
|
<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.
|
||
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<p>
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||
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||
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<h3 class=fn><a href="qvaluelist.html">QValueList</a><int> <a name="pointSizes"></a>QFontDatabase::pointSizes ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style = QString::null )
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||
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</h3>
|
||
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Returns a list of the point sizes available for the font that has
|
||
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|
family <em>family</em> and style <em>style</em>. The list may be empty.
|
||
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<p> <p>See also <a href="#smoothSizes">smoothSizes</a>() and <a href="#standardSizes">standardSizes</a>().
|
||
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|
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||
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<h3 class=fn><a href="qvaluelist.html">QValueList</a><int> <a name="pointSizes-2"></a>QFontDatabase::pointSizes ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style, const <a href="qstring.html">QString</a> & )
|
||
|
|
</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="qstring.html">QString</a> <a name="scriptName"></a>QFontDatabase::scriptName ( <a href="qfont.html#Script-enum">QFont::Script</a> script )<tt> [static]</tt>
|
||
|
|
</h3>
|
||
|
|
Returns a string that gives a default description of the <em>script</em>
|
||
|
|
(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.
|
||
|
|
<p> <p>See also <a href="qfont.html#Script-enum">QFont::Script</a>.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qstring.html">QString</a> <a name="scriptSample"></a>QFontDatabase::scriptSample ( <a href="qfont.html#Script-enum">QFont::Script</a> script )<tt> [static]</tt>
|
||
|
|
</h3>
|
||
|
|
Returns a string with sample characters from <em>script</em>.
|
||
|
|
<p> <p>See also <a href="qfont.html#Script-enum">QFont::Script</a>.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qvaluelist.html">QValueList</a><int> <a name="smoothSizes"></a>QFontDatabase::smoothSizes ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style )
|
||
|
|
</h3>
|
||
|
|
Returns the point sizes of a font that has family <em>family</em> and
|
||
|
|
style <em>style</em> that will look attractive. The list may be empty.
|
||
|
|
For non-scalable fonts and bitmap scalable fonts, this function
|
||
|
|
is equivalent to <a href="#pointSizes">pointSizes</a>().
|
||
|
|
<p> <p>See also <a href="#pointSizes">pointSizes</a>() and <a href="#standardSizes">standardSizes</a>().
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qvaluelist.html">QValueList</a><int> <a name="smoothSizes-2"></a>QFontDatabase::smoothSizes ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style, const <a href="qstring.html">QString</a> & )
|
||
|
|
</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="qvaluelist.html">QValueList</a><int> <a name="standardSizes"></a>QFontDatabase::standardSizes ()<tt> [static]</tt>
|
||
|
|
</h3>
|
||
|
|
Returns a list of standard font sizes.
|
||
|
|
<p> <p>See also <a href="#smoothSizes">smoothSizes</a>() and <a href="#pointSizes">pointSizes</a>().
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qstring.html">QString</a> <a name="styleString"></a>QFontDatabase::styleString ( const <a href="qfont.html">QFont</a> & f )
|
||
|
|
</h3>
|
||
|
|
Returns a string that describes the style of the font <em>f</em>. For
|
||
|
|
example, "Bold Italic", "Bold", "Italic" or "Normal". An empty
|
||
|
|
string may be returned.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="styles"></a>QFontDatabase::styles ( const <a href="qstring.html">QString</a> & family ) const
|
||
|
|
</h3>
|
||
|
|
Returns a list of the styles available for the font family <em>family</em>. Some example styles: "Light", "Light Italic", "Bold",
|
||
|
|
"Oblique", "Demi". The list may be empty.
|
||
|
|
|
||
|
|
<h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="styles-2"></a>QFontDatabase::styles ( const <a href="qstring.html">QString</a> & family, 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>int <a name="weight"></a>QFontDatabase::weight ( const <a href="qstring.html">QString</a> & family, const <a href="qstring.html">QString</a> & style ) const
|
||
|
|
</h3>
|
||
|
|
Returns the weight of the font that has family <em>family</em> and style
|
||
|
|
<em>style</em>. If there is no such family and style combination,
|
||
|
|
returns -1.
|
||
|
|
<p> <p>See also <a href="#italic">italic</a>() and <a href="#bold">bold</a>().
|
||
|
|
|
||
|
|
<h3 class=fn>int <a name="weight-2"></a>QFontDatabase::weight ( 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>
|
||
|
|
|
||
|
|
<!-- eof -->
|
||
|
|
<hr><p>
|
||
|
|
This file is part of the <a href="index.html">Qt toolkit</a>.
|
||
|
|
Copyright © 1995-2007
|
||
|
|
<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
|
||
|
|
<table width=100% cellspacing=0 border=0><tr>
|
||
|
|
<td>Copyright © 2007
|
||
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
||
|
|
<td align=right><div align=right>Qt 3.3.8</div>
|
||
|
|
</table></div></address></body>
|
||
|
|
</html>
|