<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <title>Wt: Wt::WFontMetrics Class Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="doxygen.css" rel="stylesheet" type="text/css" /> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="search/search.js"></script> <script type="text/javascript"> $(document).ready(function() { searchBox.OnSelectItem(0); }); </script> </head> <body> <div id="top"><!-- do not remove this div! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">Wt  <span id="projectnumber">3.2.3</span> </div> </td> </tr> </tbody> </table> </div> <!-- Generated by Doxygen 1.7.5.1 --> <script type="text/javascript"> var searchBox = new SearchBox("searchBox", "search",false,'Search'); </script> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> <li><a href="modules.html"><span>Modules</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li class="current"><a href="annotated.html"><span>Classes</span></a></li> <li><a href="files.html"><span>Files</span></a></li> <li> <div id="MSearchBox" class="MSearchBoxInactive"> <span class="left"> <img id="MSearchSelect" src="search/mag_sel.png" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" alt=""/> <input type="text" id="MSearchField" value="Search" accesskey="S" onfocus="searchBox.OnSearchFieldFocus(true)" onblur="searchBox.OnSearchFieldFocus(false)" 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--> <p>A value class that describes font metrics for a font. <a href="classWt_1_1WFontMetrics.html#details">More...</a></p> <p><code>#include <Wt/WFontMetrics></code></p> <p><a href="classWt_1_1WFontMetrics-members.html">List of all members.</a></p> <table class="memberdecls"> <tr><td colspan="2"><h2><a name="pub-methods"></a> Public Member Functions</h2></td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a3a17920227740c4df9c98e44989cf765"></a><!-- doxytag: member="Wt::WFontMetrics::WFontMetrics" ref="a3a17920227740c4df9c98e44989cf765" args="(const WFont &font, double leading, double ascent, double descent)" -->  </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WFontMetrics.html#a3a17920227740c4df9c98e44989cf765">WFontMetrics</a> (const <a class="el" href="classWt_1_1WFont.html">WFont</a> &font, double leading, double ascent, double descent)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a font metrics information object. <br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a427977831824db00d360fef32132e4cf"></a><!-- doxytag: member="Wt::WFontMetrics::font" ref="a427977831824db00d360fef32132e4cf" args="() const " --> const <a class="el" href="classWt_1_1WFont.html">WFont</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WFontMetrics.html#a427977831824db00d360fef32132e4cf">font</a> () const </td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the font for which these font metrics were computed. <br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WFontMetrics.html#a794fd33dcac0c32e4a447e81735fde9c">size</a> () const </td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the font size. <a href="#a794fd33dcac0c32e4a447e81735fde9c"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WFontMetrics.html#a64aae7c0676780284595a72c753a1613">height</a> () const </td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the font height. <a href="#a64aae7c0676780284595a72c753a1613"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WFontMetrics.html#a155de0e68bdc310814f59cbee541ff13">leading</a> () const </td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the font leading length. <a href="#a155de0e68bdc310814f59cbee541ff13"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WFontMetrics.html#ac12afb5fdac3cb47f41d14f15b951f61">ascent</a> () const </td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the font ascent length. <a href="#ac12afb5fdac3cb47f41d14f15b951f61"></a><br/></td></tr> <tr><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WFontMetrics.html#a2bb8b19b4c61b25cd344dd6c6e5c6298">descent</a> () const </td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the font descent length. <a href="#a2bb8b19b4c61b25cd344dd6c6e5c6298"></a><br/></td></tr> </table> <hr/><a name="details" id="details"></a><h2>Detailed Description</h2> <div class="textblock"><p>A value class that describes font metrics for a font. </p> <p>This class provides font metrics for a given font. It is returned by an implementation of <a class="el" href="classWt_1_1WPaintDevice.html#a468ec8684106f8e24b3c46876ee86ff7" title="Returns font metrics.">WPaintDevice::fontMetrics()</a>, and may differ between devices.</p> <p>All methods return pixel dimensions.</p> <dl class="see"><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WPaintDevice.html" title="The abstract base class for a paint device.">WPaintDevice</a> </dd></dl> </div><hr/><h2>Member Function Documentation</h2> <a class="anchor" id="ac12afb5fdac3cb47f41d14f15b951f61"></a><!-- doxytag: member="Wt::WFontMetrics::ascent" ref="ac12afb5fdac3cb47f41d14f15b951f61" args="() const " --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">double Wt::WFontMetrics::ascent </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </div> <div class="memdoc"> <p>Returns the font ascent length. </p> <p>This is vertical space which corresponds to the maximum height of a character over the baseline (although many fonts violate this for some glyphs). </p> </div> </div> <a class="anchor" id="a2bb8b19b4c61b25cd344dd6c6e5c6298"></a><!-- doxytag: member="Wt::WFontMetrics::descent" ref="a2bb8b19b4c61b25cd344dd6c6e5c6298" args="() const " --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">double Wt::WFontMetrics::descent </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </div> <div class="memdoc"> <p>Returns the font descent length. </p> <p>This is vertical space which corresponds to the maximum height of a character under the baseline (although many fonts violate this for some glyphs). </p> </div> </div> <a class="anchor" id="a64aae7c0676780284595a72c753a1613"></a><!-- doxytag: member="Wt::WFontMetrics::height" ref="a64aae7c0676780284595a72c753a1613" args="() const " --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">double Wt::WFontMetrics::height </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </div> <div class="memdoc"> <p>Returns the font height. </p> <p>The font height is the total height of a text line. It is usually a bit bigger than the font size to have natural line spacing. </p> </div> </div> <a class="anchor" id="a155de0e68bdc310814f59cbee541ff13"></a><!-- doxytag: member="Wt::WFontMetrics::leading" ref="a155de0e68bdc310814f59cbee541ff13" args="() const " --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">double Wt::WFontMetrics::leading </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </div> <div class="memdoc"> <p>Returns the font leading length. </p> <p>This is vertical space provided on top of the ascent (empty space which serves as natural line spacing). </p> </div> </div> <a class="anchor" id="a794fd33dcac0c32e4a447e81735fde9c"></a><!-- doxytag: member="Wt::WFontMetrics::size" ref="a794fd33dcac0c32e4a447e81735fde9c" args="() const " --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">double Wt::WFontMetrics::size </td> <td>(</td> <td class="paramname"></td><td>)</td> <td> const</td> </tr> </table> </div> <div class="memdoc"> <p>Returns the font size. </p> <p>This is the same as: </p> <div class="fragment"><pre class="fragment"> <a class="code" href="classWt_1_1WFontMetrics.html#a427977831824db00d360fef32132e4cf" title="Returns the font for which these font metrics were computed.">font</a>().size().sizeLength() </pre></div><p>e.g.~for a font with size set to 16px, this returns 16. </p> </div> </div> </div> <!-- window showing the filter options --> <div id="MSearchSelectWindow" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" onkeydown="return searchBox.OnSearchSelectKey(event)"> <a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(0)"><span class="SelectionMark"> </span>All</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(1)"><span class="SelectionMark"> </span>Classes</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(2)"><span class="SelectionMark"> </span>Namespaces</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(3)"><span class="SelectionMark"> </span>Files</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(4)"><span class="SelectionMark"> </span>Functions</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(5)"><span class="SelectionMark"> </span>Variables</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(6)"><span class="SelectionMark"> </span>Typedefs</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(7)"><span class="SelectionMark"> </span>Enumerations</a><a class="SelectItem" href="javascript:void(0)" onclick="searchBox.OnSelectItem(8)"><span class="SelectionMark"> </span>Enumerator</a></div> <!-- iframe showing the search results (closed by default) --> <div id="MSearchResultsWindow"> <iframe src="javascript:void(0)" frameborder="0" name="MSearchResults" id="MSearchResults"> </iframe> </div> <hr size="1"><address style="text-align: right; margin: 3px"><small> Generated on Thu Nov 1 2012 for <a href="http://www.webtoolkit.eu/wt">the C++ Web Toolkit (Wt)</a> by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" border="0" style="vertical-align: middle; display: inline-block; height: 2em"></a> 1.7.5.1</small></address> </body> </html>