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<td >Qt 5.9</td><td ><a href="qtgui-index.html">Qt GUI</a></td><td ><a href="qtgui-module.html">C++ Classes</a></td><td >QFontInfo</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QFontInfo Class</h1>
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<p>The <a href="qfontinfo.html">QFontInfo</a> class provides general information about fonts. <a href="#details">More...</a></p>
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<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QFontInfo&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += gui</td></tr></table></div><ul>
<li><a href="qfontinfo-members.html">List of all members, including inherited members</a></li>
<li><a href="qfontinfo-obsolete.html">Obsolete members</a></li>
</ul>
<p><b>Note:</b> All functions in this class are reentrant.</p>
<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#QFontInfo">QFontInfo</a></b>(const QFont &amp;<i>font</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#QFontInfo-1">QFontInfo</a></b>(const QFontInfo &amp;<i>fi</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#dtor.QFontInfo">~QFontInfo</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#bold">bold</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#exactMatch">exactMatch</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#family">family</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#fixedPitch">fixedPitch</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#italic">italic</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#pixelSize">pixelSize</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#pointSize">pointSize</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#pointSizeF">pointSizeF</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QFont::Style </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#style">style</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QFont::StyleHint </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#styleHint">styleHint</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#styleName">styleName</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#swap">swap</a></b>(QFontInfo &amp;<i>other</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#weight">weight</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QFontInfo &amp;</td><td class="memItemRight bottomAlign"><b><a href="qfontinfo.html#operator-eq">operator=</a></b>(const QFontInfo &amp;<i>fi</i>)</td></tr>
</table></div>
<a name="details"></a>
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<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qfontinfo.html">QFontInfo</a> class provides general information about fonts.</p>
<p>The <a href="qfontinfo.html">QFontInfo</a> class provides the same access functions as <a href="qfont.html">QFont</a>, e.g&#x2e; <a href="qfontinfo.html#family">family</a>(), <a href="qfontinfo.html#pointSize">pointSize</a>(), <a href="qfontinfo.html#italic">italic</a>(), <a href="qfontinfo.html#weight">weight</a>(), <a href="qfontinfo.html#fixedPitch">fixedPitch</a>(), <a href="qfontinfo.html#styleHint">styleHint</a>() etc. But whilst the <a href="qfont.html">QFont</a> access functions return the values that were set, a <a href="qfontinfo.html">QFontInfo</a> object returns the values that apply to the font that will actually be used to draw the text.</p>
<p>For example, when the program asks for a 25pt Courier font on a machine that has a non-scalable 24pt Courier font, <a href="qfont.html">QFont</a> will (normally) use the 24pt Courier for rendering. In this case, <a href="qfont.html#pointSize">QFont::pointSize</a>() returns 25 and <a href="qfontinfo.html#pointSize">QFontInfo::pointSize</a>() returns 24.</p>
<p>There are three ways to create a <a href="qfontinfo.html">QFontInfo</a> object.</p>
<ol class="1" type="1"><li>Calling the <a href="qfontinfo.html">QFontInfo</a> constructor with a <a href="qfont.html">QFont</a> creates a font info object for a screen-compatible font, i.e&#x2e; the font cannot be a printer font. If the font is changed later, the font info object is <i>not</i> updated.<p>(Note: If you use a printer font the values returned may be inaccurate. Printer fonts are not always accessible so the nearest screen font is used if a printer font is supplied.)</p>
</li>
<li><a href="../qtwidgets/qwidget.html#fontInfo">QWidget::fontInfo</a>() returns the font info for a widget's font. This is equivalent to calling <a href="qfontinfo.html">QFontInfo</a>(widget-&gt;<a href="../qtwidgets/stylesheet-reference.html#font">font</a>()). If the widget's font is changed later, the font info object is <i>not</i> updated.</li>
<li><a href="qpainter.html#fontInfo">QPainter::fontInfo</a>() returns the font info for a painter's current font. If the painter's font is changed later, the font info object is <i>not</i> updated.</li>
</ol>
</div>
<p><b>See also </b><a href="qfont.html">QFont</a>, <a href="qfontmetrics.html">QFontMetrics</a>, and <a href="qfontdatabase.html">QFontDatabase</a>.</p>
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<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QFontInfo[overload1]$$$QFontInfoconstQFont& -->
<h3 class="fn" id="QFontInfo"><a name="QFontInfo"></a>QFontInfo::<span class="name">QFontInfo</span>(const <span class="type"><a href="qfont.html">QFont</a></span> &amp;<i>font</i>)</h3>
<p>Constructs a font info object for <i>font</i>.</p>
<p>The font must be screen-compatible, i.e&#x2e; a font you use when drawing text in <a href="../qtwidgets/qwidget.html">widgets</a> or <a href="qpixmap.html">pixmaps</a>, not <a href="qpicture.html">QPicture</a> or QPrinter.</p>
<p>The font info object holds the information for the font that is passed in the constructor at the time it is created, and is not updated if the font's attributes are changed later.</p>
<p>Use <a href="qpainter.html#fontInfo">QPainter::fontInfo</a>() to get the font info when painting. This will give correct results also when painting on paint device that is not screen-compatible.</p>
<!-- @@@QFontInfo -->
<!-- $$$QFontInfo$$$QFontInfoconstQFontInfo& -->
<h3 class="fn" id="QFontInfo-1"><a name="QFontInfo-1"></a>QFontInfo::<span class="name">QFontInfo</span>(const <span class="type"><a href="qfontinfo.html#QFontInfo">QFontInfo</a></span> &amp;<i>fi</i>)</h3>
<p>Constructs a copy of <i>fi</i>.</p>
<!-- @@@QFontInfo -->
<!-- $$$~QFontInfo[overload1]$$$~QFontInfo -->
<h3 class="fn" id="dtor.QFontInfo"><a name="dtor.QFontInfo"></a>QFontInfo::<span class="name">~QFontInfo</span>()</h3>
<p>Destroys the font info object.</p>
<!-- @@@~QFontInfo -->
<!-- $$$bold[overload1]$$$bold -->
<h3 class="fn" id="bold"><a name="bold"></a><span class="type">bool</span> QFontInfo::<span class="name">bold</span>() const</h3>
<p>Returns <code>true</code> if <a href="qfontinfo.html#weight">weight</a>() would return a value greater than <a href="qfont.html#Weight-enum">QFont::Normal</a>; otherwise returns <code>false</code>.</p>
<p><b>See also </b><a href="qfontinfo.html#weight">weight</a>() and <a href="qfont.html#bold">QFont::bold</a>().</p>
<!-- @@@bold -->
<!-- $$$exactMatch[overload1]$$$exactMatch -->
<h3 class="fn" id="exactMatch"><a name="exactMatch"></a><span class="type">bool</span> QFontInfo::<span class="name">exactMatch</span>() const</h3>
<p>Returns <code>true</code> if the matched window system font is exactly the same as the one specified by the font; otherwise returns <code>false</code>.</p>
<p><b>See also </b><a href="qfont.html#exactMatch">QFont::exactMatch</a>().</p>
<!-- @@@exactMatch -->
<!-- $$$family[overload1]$$$family -->
<h3 class="fn" id="family"><a name="family"></a><span class="type"><a href="../qtcore/qstring.html">QString</a></span> QFontInfo::<span class="name">family</span>() const</h3>
<p>Returns the family name of the matched window system font.</p>
<p><b>See also </b><a href="qfont.html#family">QFont::family</a>().</p>
<!-- @@@family -->
<!-- $$$fixedPitch[overload1]$$$fixedPitch -->
<h3 class="fn" id="fixedPitch"><a name="fixedPitch"></a><span class="type">bool</span> QFontInfo::<span class="name">fixedPitch</span>() const</h3>
<p>Returns the fixed pitch value of the matched window system font.</p>
<p><b>See also </b><a href="qfont.html#fixedPitch">QFont::fixedPitch</a>().</p>
<!-- @@@fixedPitch -->
<!-- $$$italic[overload1]$$$italic -->
<h3 class="fn" id="italic"><a name="italic"></a><span class="type">bool</span> QFontInfo::<span class="name">italic</span>() const</h3>
<p>Returns the italic value of the matched window system font.</p>
<p><b>See also </b><a href="qfont.html#italic">QFont::italic</a>().</p>
<!-- @@@italic -->
<!-- $$$pixelSize[overload1]$$$pixelSize -->
<h3 class="fn" id="pixelSize"><a name="pixelSize"></a><span class="type">int</span> QFontInfo::<span class="name">pixelSize</span>() const</h3>
<p>Returns the pixel size of the matched window system font.</p>
<p><b>See also </b><a href="qfont.html#pointSize">QFont::pointSize</a>().</p>
<!-- @@@pixelSize -->
<!-- $$$pointSize[overload1]$$$pointSize -->
<h3 class="fn" id="pointSize"><a name="pointSize"></a><span class="type">int</span> QFontInfo::<span class="name">pointSize</span>() const</h3>
<p>Returns the point size of the matched window system font.</p>
<p><b>See also </b><a href="qfontinfo.html#pointSizeF">pointSizeF</a>() and <a href="qfont.html#pointSize">QFont::pointSize</a>().</p>
<!-- @@@pointSize -->
<!-- $$$pointSizeF[overload1]$$$pointSizeF -->
<h3 class="fn" id="pointSizeF"><a name="pointSizeF"></a><span class="type"><a href="../qtcore/qtglobal.html#qreal-typedef">qreal</a></span> QFontInfo::<span class="name">pointSizeF</span>() const</h3>
<p>Returns the point size of the matched window system font.</p>
<p><b>See also </b><a href="qfont.html#pointSizeF">QFont::pointSizeF</a>().</p>
<!-- @@@pointSizeF -->
<!-- $$$style[overload1]$$$style -->
<h3 class="fn" id="style"><a name="style"></a><span class="type"><a href="qfont.html#Style-enum">QFont::Style</a></span> QFontInfo::<span class="name">style</span>() const</h3>
<p>Returns the style value of the matched window system font.</p>
<p><b>See also </b><a href="qfont.html#style">QFont::style</a>().</p>
<!-- @@@style -->
<!-- $$$styleHint[overload1]$$$styleHint -->
<h3 class="fn" id="styleHint"><a name="styleHint"></a><span class="type"><a href="qfont.html#StyleHint-enum">QFont::StyleHint</a></span> QFontInfo::<span class="name">styleHint</span>() const</h3>
<p>Returns the style of the matched window system font.</p>
<p>Currently only returns the style hint set in <a href="qfont.html">QFont</a>.</p>
<p><b>See also </b><a href="qfont.html#styleHint">QFont::styleHint</a>() and <a href="qfont.html#StyleHint-enum">QFont::StyleHint</a>.</p>
<!-- @@@styleHint -->
<!-- $$$styleName[overload1]$$$styleName -->
<h3 class="fn" id="styleName"><a name="styleName"></a><span class="type"><a href="../qtcore/qstring.html">QString</a></span> QFontInfo::<span class="name">styleName</span>() const</h3>
<p>Returns the style name of the matched window system font on systems that support it.</p>
<p>This function was introduced in  Qt 4.8.</p>
<p><b>See also </b><a href="qfont.html#styleName">QFont::styleName</a>().</p>
<!-- @@@styleName -->
<!-- $$$swap[overload1]$$$swapQFontInfo& -->
<h3 class="fn" id="swap"><a name="swap"></a><span class="type">void</span> QFontInfo::<span class="name">swap</span>(<span class="type"><a href="qfontinfo.html#QFontInfo">QFontInfo</a></span> &amp;<i>other</i>)</h3>
<p>Swaps this font info instance with <i>other</i>. This function is very fast and never fails.</p>
<p>This function was introduced in  Qt 5.0.</p>
<!-- @@@swap -->
<!-- $$$weight[overload1]$$$weight -->
<h3 class="fn" id="weight"><a name="weight"></a><span class="type">int</span> QFontInfo::<span class="name">weight</span>() const</h3>
<p>Returns the weight of the matched window system font.</p>
<p><b>See also </b><a href="qfont.html#weight">QFont::weight</a>() and <a href="qfontinfo.html#bold">bold</a>().</p>
<!-- @@@weight -->
<!-- $$$operator=[overload1]$$$operator=constQFontInfo& -->
<h3 class="fn" id="operator-eq"><a name="operator-eq"></a><span class="type"><a href="qfontinfo.html#QFontInfo">QFontInfo</a></span> &amp;QFontInfo::<span class="name">operator=</span>(const <span class="type"><a href="qfontinfo.html#QFontInfo">QFontInfo</a></span> &amp;<i>fi</i>)</h3>
<p>Assigns the font info in <i>fi</i>.</p>
<!-- @@@operator= -->
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