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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/qsimplerichtext.cpp:90 --><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>QSimpleRichText 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>QSimpleRichText Class Reference</h1><p>The QSimpleRichText class provides a small displayable piece of rich text.<a href="#details">More...</a><p><tt>#include <<a href="qsimplerichtext-h.html">qsimplerichtext.h</a>></tt><p><a href="qsimplerichtext-members.html">List of all member functions.</a><h2>Public Members</h2><ul><li><div class=fn><a href="#QSimpleRichText"><b>QSimpleRichText</b></a> ( const QString & text, const QFont & fnt, const QString & context = QString::null, const QStyleSheet * sheet = 0 )</div></li><li><div class=fn><a href="#QSimpleRichText-2"><b>QSimpleRichText</b></a> ( const QString & text, const QFont & fnt, const QString & context, const QStyleSheet * sheet, const QMimeSourceFactory * factory, int pageBreak = -1, const QColor & linkColor = Qt::blue, bool linkUnderline = TRUE )</div></li><li><div class=fn><a href="#~QSimpleRichText"><b>~QSimpleRichText</b></a> ()</div></li><li><div class=fn>void <a href="#setWidth-2"><b>setWidth</b></a> ( int w )</div></li><li><div class=fn>void <a href="#setWidth"><b>setWidth</b></a> ( QPainter * p, int w )</div></li><li><div class=fn>void <a href="#setDefaultFont"><b>setDefaultFont</b></a> ( const QFont & f )</div></li><li><div class=fn>int <a href="#width"><b>width</b></a> () const</div></li><li><div class=fn>int <a href="#widthUsed"><b>widthUsed</b></a> () const</div></li><li><div class=fn>int <a href="#height"><b>height</b></a> () const</div></li><li><div class=fn>void <a href="#adjustSize"><b>adjustSize</b></a> ()</div></li><li><div class=fn>void <a href="#draw"><b>draw</b></a> ( QPainter * p, int x, int y, const QRect & clipRect, const QColorGroup & cg, const QBrush * paper = 0 ) const</div></li><li><div class=fn>void draw ( QPainter * p, int x, int y, const QRegion & clipRegion, const QColorGroup & cg, const QBrush * paper = 0 ) const <em>(obsolete)</em></div></li><li><div class=fn>QString <a href="#context"><b>context</b></a> () const</div></li><li><div class=fn>QString <a href="#anchorAt"><b>anchorAt</b></a> ( const QPoint & pos ) const</div></li><li><div class=fn>bool <a href="#inText"><b>inText</b></a> ( const QPoint & pos ) const</div></li></ul><hr><a name="details"></a><h2>Detailed Description</h2>The QSimpleRichText class provides a small displayable piece of rich text.<p> <p> This class encapsulates simple rich text usage in which a stringis interpreted as rich text and can be drawn. This is particularlyuseful if you want to display some rich text in a custom widget. A<a href="qstylesheet.html">QStyleSheet</a> is needed to interpret the tags and format the richtext. Qt provides a default HTML-like style sheet, but you maydefine custom style sheets.<p> Once created, the rich text object can be queried for its <a href="#width">width</a>(),<a href="#height">height</a>(), and the actual width used (see <a href="#widthUsed">widthUsed</a>()). Mostimportantly, it can be drawn on any given <a href="qpainter.html">QPainter</a> with <a href="#draw">draw</a>().QSimpleRichText can also be used to implement hypertext or activetext facilities by using <a href="#anchorAt">anchorAt</a>(). A hit test through <a href="#inText">inText</a>()makes it possible to use simple rich text for text objects ineditable drawing canvases.<p> Once constructed from a string the contents cannot be changed,only resized. If the contents change, just throw the rich textobject away and make a new one with the new contents.<p> For large documents use <a href="qtextedit.html">QTextEdit</a> or <a href="qtextbrowser.html">QTextBrowser</a>. For very smallitems of rich text you can use a <a href="qlabel.html">QLabel</a>.<p>See also <a href="text.html">Text Related Classes</a>.<hr><h2>Member Function Documentation</h2><h3 class=fn><a name="QSimpleRichText"></a>QSimpleRichText::QSimpleRichText ( const <a href="qstring.html">QString</a> & text, const <a href="qfont.html">QFont</a> & fnt, const <a href="qstring.html">QString</a> & context = QString::null, const <a href="qstylesheet.html">QStyleSheet</a> * sheet = 0 )</h3>Constructs a QSimpleRichText from the rich text string <em>text</em> andthe font <em>fnt</em>.<p> The font is used as a basis for the text rendering. When usingrich text rendering on a widget <em>w</em>, you would normally specifythe widget's font, for example:<p> <pre> QSimpleRichText myrichtext( contents, mywidget->font() ); </pre> <p> <em>context</em> is the optional context of the rich text object. Thisbecomes important if <em>text</em> contains relative references, forexample within image tags. QSimpleRichText always uses the defaultmime source factory (see <a href="qmimesourcefactory.html#defaultFactory">QMimeSourceFactory::defaultFactory</a>())to resolve those references. The context will then be used tocalculate the absolute path. See<a href="qmimesourcefactory.html#makeAbsolute">QMimeSourceFactory::makeAbsolute</a>() for details.<p> The <em>sheet</em> is an optional style sheet. If it is 0, the defaultstyle sheet will be used (see <a href="qstylesheet.html#defaultSheet">QStyleSheet::defaultSheet</a>()).<h3 class=fn><a name="QSimpleRichText-2"></a>QSimpleRichText::QSimpleRichText ( const <a href="qstring.html">QString</a> & text, const <a href="qfont.html">QFont</a> & fnt, const <a href="qstring.html">QString</a> & context, const <a href="qstylesheet.html">QStyleSheet</a> * sheet, const <a href="qmimesourcefactory.html">QMimeSourceFactory</a> * factory, int pageBreak = -1, const <a href="qcolor.html">QColor</a> & linkColor = Qt::blue, bool linkUnderline = TRUE )</h3>Constructs a QSimpleRichText from the rich text string <em>text</em> andthe font <em>fnt</em>.<p> This is a slightly more complex constructor for QSimpleRichTextthat takes an additional mime source factory <em>factory</em>, a pagebreak parameter <em>pageBreak</em> and a bool <em>linkUnderline</em>. <em>linkColor</em> is only provided for compatibility, but has no effect,as <a href="qcolorgroup.html">QColorGroup</a>'s <a href="qcolorgroup.html#link">QColorGroup::link</a>() color is used now.<p> <em>context</em> is the optional context of the rich text object. Thisbecomes important if <em>text</em> contains relative references, forexample within image tags. QSimpleRichText always uses the defaultmime source factory (see <a href="qmimesourcefactory.html#defaultFactory">QMimeSourceFactory::defaultFactory</a>())to resolve those references. The context will then be used tocalculate the absolute path. See<a href="qmimesourcefactory.html#makeAbsolute">QMimeSourceFactory::makeAbsolute</a>() for details.<p> The <em>sheet</em> is an optional style sheet. If it is 0, the defaultstyle sheet will be used (see <a href="qstylesheet.html#defaultSheet">QStyleSheet::defaultSheet</a>()).<p> This constructor is useful for creating a QSimpleRichText objectsuitable for printing. Set <em>pageBreak</em> to be the height of thecontents area of the pages.<h3 class=fn><a name="~QSimpleRichText"></a>QSimpleRichText::~QSimpleRichText ()</h3>Destroys the rich text object, freeing memory.<h3 class=fn>void <a name="adjustSize"></a>QSimpleRichText::adjustSize ()</h3>Adjusts the richt text object to a reasonable size.<p> <p>See also <a href="#setWidth">setWidth</a>().<h3 class=fn><a href="qstring.html">QString</a> <a name="anchorAt"></a>QSimpleRichText::anchorAt ( const <a href="qpoint.html">QPoint</a> & pos ) const</h3>Returns the anchor at the requested position, <em>pos</em>. An emptystring is returned if no anchor is specified for this position.<h3 class=fn><a href="qstring.html">QString</a> <a name="context"></a>QSimpleRichText::context () const</h3>Returns the context of the rich text object. If no context hasbeen specified in the constructor, a null string is returned. Thecontext is the path to use to look up relative links, such asimage tags and anchor references.<h3 class=fn>void <a name="draw"></a>QSimpleRichText::draw ( <a href="qpainter.html">QPainter</a> * p, int x, int y, const <a href="qrect.html">QRect</a> & clipRect, const <a href="qcolorgroup.html">QColorGroup</a> & cg, const <a href="qbrush.html">QBrush</a> * paper = 0 ) const</h3>Draws the formatted text with painter <em>p</em>, at position (<em>x</em>, <em>y</em>), clipped to <em>clipRect</em>. The clipping rectangle is given in therich text object's coordinates translated by (<em>x</em>, <em>y</em>). Colorsfrom the color group <em>cg</em> are used as needed, and if not 0, <em>*paper</em> is used as the background brush.<p> Note that the display code is highly optimized to reduce flicker,so passing a brush for <em>paper</em> is preferable to simply clearingthe area to be painted and then calling this without a brush.<p>Example: <a href="helpviewer-example.html#x1017">helpviewer/helpwindow.cpp</a>.<h3 class=fn>void <a name="draw-2"></a>QSimpleRichText::draw ( <a href="qpainter.html">QPainter</a> * p, int x, int y, const <a href="qregion.html">QRegion</a> & clipRegion, const <a href="qcolorgroup.html">QColorGroup</a> & cg, const <a href="qbrush.html">QBrush</a> * paper = 0 ) const</h3> <p> <b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code.<p> Use the version with clipRect instead. The region version hasproblems with larger documents on some platforms (on X11 regionsinternally are represented with 16bit coordinates).<h3 class=fn>int <a name="height"></a>QSimpleRichText::height () const</h3>Returns the height of the rich text object in pixels.<p> <p>See also <a href="#setWidth">setWidth</a>().<p>Example: <a href="helpviewer-example.html#x1018">helpviewer/helpwindow.cpp</a>.<h3 class=fn>bool <a name="inText"></a>QSimpleRichText::inText ( const <a href="qpoint.html">QPoint</a> & pos ) const</h3>Returns TRUE if <em>pos</em> is within a text line of the rich textobject; otherwise returns FALSE.<h3 class=fn>void <a name="setDefaultFont"></a>QSimpleRichText::setDefaultFont ( const <a href="qfont.html">QFont</a> & f )</h3>Sets the default font for the rich text object to <em>f</em><h3 class=fn>void <a name="setWidth"></a>QSimpleRichText::setWidth ( <a href="qpainter.html">QPainter</a> * p, int w )</h3>Sets the width of the rich text object to <em>w</em> pixels,recalculating the layout as if it were to be drawn with painter <em>p</em>.<p> Passing a painter is useful when you intend drawing on devicesother than the screen, for example a <a href="qprinter.html">QPrinter</a>.<p> <p>See also <a href="#height">height</a>() and <a href="#adjustSize">adjustSize</a>().<p>Example: <a href="helpviewer-example.html#x1019">helpviewer/helpwindow.cpp</a>.<h3 class=fn>void <a name="setWidth-2"></a>QSimpleRichText::setWidth ( int w )</h3>This is an overloaded member function, provided for convenience. It behaves essentially like the above function.<p> Sets the width of the rich text object to <em>w</em> pixels.<p> <p>See also <a href="#height">height</a>() and <a href="#adjustSize">adjustSize</a>().<h3 class=fn>int <a name="width"></a>QSimpleRichText::width () const</h3>Returns the set width of the rich text object in pixels.<p> <p>See also <a href="#widthUsed">widthUsed</a>().<h3 class=fn>int <a name="widthUsed"></a>QSimpleRichText::widthUsed () const</h3>Returns the width in pixels that is actually used by the rich textobject. This can be smaller or wider than the set width.<p> It may be wider, for example, if the text contains images ornon-breakable words that are already wider than the availablespace. It's smaller when the object only consists of lines that donot fill the width completely.<p> <p>See also <a href="#width">width</a>().<!-- eof --><hr><p>This file is part of the <a href="index.html">Qt toolkit</a>.Copyright © 1995-2002<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 © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a><td align=right><div align=right>Qt version 3.0.5</div></table></div></address></body></html>⌨️ 快捷键说明
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