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223 lines
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223 lines
15 KiB
13 years ago
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<title>TQSimpleRichText Class</title>
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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>TQSimpleRichText Class Reference</h1>
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<p>The TQSimpleRichText class provides a small displayable piece of rich text.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="tqsimplerichtext-h.html">tqsimplerichtext.h</a>></tt>
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<p><a href="tqsimplerichtext-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="#TQSimpleRichText"><b>TQSimpleRichText</b></a> ( const TQString & text, const TQFont & fnt, const TQString & context = TQString::null, const TQStyleSheet * sheet = 0 )</li>
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<li class=fn><a href="#TQSimpleRichText-2"><b>TQSimpleRichText</b></a> ( const TQString & text, const TQFont & fnt, const TQString & context, const TQStyleSheet * sheet, const TQMimeSourceFactory * factory, int pageBreak = -1, const TQColor & linkColor = TQt::blue, bool linkUnderline = TRUE )</li>
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<li class=fn><a href="#~TQSimpleRichText"><b>~TQSimpleRichText</b></a> ()</li>
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<li class=fn>void <a href="#setWidth-2"><b>setWidth</b></a> ( int w )</li>
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<li class=fn>void <a href="#setWidth"><b>setWidth</b></a> ( TQPainter * p, int w )</li>
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<li class=fn>void <a href="#setDefaultFont"><b>setDefaultFont</b></a> ( const TQFont & f )</li>
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<li class=fn>int <a href="#width"><b>width</b></a> () const</li>
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<li class=fn>int <a href="#widthUsed"><b>widthUsed</b></a> () const</li>
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<li class=fn>int <a href="#height"><b>height</b></a> () const</li>
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<li class=fn>void <a href="#adjustSize"><b>adjustSize</b></a> ()</li>
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<li class=fn>void <a href="#draw"><b>draw</b></a> ( TQPainter * p, int x, int y, const TQRect & clipRect, const TQColorGroup & cg, const TQBrush * paper = 0 ) const</li>
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<li class=fn>void draw ( TQPainter * p, int x, int y, const TQRegion & clipRegion, const TQColorGroup & cg, const TQBrush * paper = 0 ) const <em>(obsolete)</em></li>
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<li class=fn>TQString <a href="#context"><b>context</b></a> () const</li>
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<li class=fn>TQString <a href="#anchorAt"><b>anchorAt</b></a> ( const TQPoint & pos ) const</li>
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<li class=fn>bool <a href="#inText"><b>inText</b></a> ( const TQPoint & pos ) const</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The TQSimpleRichText class provides a small displayable piece of rich text.
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<p>
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<p> This class encapsulates simple rich text usage in which a string
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is interpreted as rich text and can be drawn. This is particularly
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useful if you want to display some rich text in a custom widget. A
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<a href="tqstylesheet.html">TQStyleSheet</a> is needed to interpret the tags and format the rich
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text. TQt provides a default HTML-like style sheet, but you may
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define custom style sheets.
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<p> Once created, the rich text object can be queried for its <a href="#width">width</a>(),
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<a href="#height">height</a>(), and the actual width used (see <a href="#widthUsed">widthUsed</a>()). Most
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importantly, it can be drawn on any given <a href="tqpainter.html">TQPainter</a> with <a href="#draw">draw</a>().
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TQSimpleRichText can also be used to implement hypertext or active
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text facilities by using <a href="#anchorAt">anchorAt</a>(). A hit test through <a href="#inText">inText</a>()
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makes it possible to use simple rich text for text objects in
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editable drawing canvases.
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<p> Once constructed from a string the contents cannot be changed,
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only resized. If the contents change, just throw the rich text
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object away and make a new one with the new contents.
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<p> For large documents use <a href="tqtextedit.html">TQTextEdit</a> or <a href="tqtextbrowser.html">TQTextBrowser</a>. For very small
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items of rich text you can use a <a href="tqlabel.html">TQLabel</a>.
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<p> If you are using TQSimpleRichText to print in high resolution you
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should call <a href="#setWidth">setWidth</a>(TQPainter, int) so that the content will be
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laid out properly on the page.
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<p>See also <a href="text.html">Text Related Classes</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="TQSimpleRichText"></a>TQSimpleRichText::TQSimpleRichText ( const <a href="tqstring.html">TQString</a> & text, const <a href="tqfont.html">TQFont</a> & fnt, const <a href="tqstring.html">TQString</a> & context = TQString::null, const <a href="tqstylesheet.html">TQStyleSheet</a> * sheet = 0 )
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</h3>
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Constructs a TQSimpleRichText from the rich text string <em>text</em> and
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the font <em>fnt</em>.
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<p> The font is used as a basis for the text rendering. When using
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rich text rendering on a widget <em>w</em>, you would normally specify
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the widget's font, for example:
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<p> <pre>
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TQSimpleRichText myrichtext( contents, mywidget->font() );
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</pre>
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<p> <em>context</em> is the optional context of the rich text object. This
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becomes important if <em>text</em> contains relative references, for
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example within image tags. TQSimpleRichText always uses the default
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mime source factory (see <a href="tqmimesourcefactory.html#defaultFactory">TQMimeSourceFactory::defaultFactory</a>())
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to resolve those references. The context will then be used to
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calculate the absolute path. See
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<a href="tqmimesourcefactory.html#makeAbsolute">TQMimeSourceFactory::makeAbsolute</a>() for details.
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<p> The <em>sheet</em> is an optional style sheet. If it is 0, the default
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style sheet will be used (see <a href="tqstylesheet.html#defaultSheet">TQStyleSheet::defaultSheet</a>()).
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<h3 class=fn><a name="TQSimpleRichText-2"></a>TQSimpleRichText::TQSimpleRichText ( const <a href="tqstring.html">TQString</a> & text, const <a href="tqfont.html">TQFont</a> & fnt, const <a href="tqstring.html">TQString</a> & context, const <a href="tqstylesheet.html">TQStyleSheet</a> * sheet, const <a href="tqmimesourcefactory.html">TQMimeSourceFactory</a> * factory, int pageBreak = -1, const <a href="tqcolor.html">TQColor</a> & linkColor = TQt::blue, bool linkUnderline = TRUE )
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</h3>
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Constructs a TQSimpleRichText from the rich text string <em>text</em> and
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the font <em>fnt</em>.
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<p> This is a slightly more complex constructor for TQSimpleRichText
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that takes an additional mime source factory <em>factory</em>, a page
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break parameter <em>pageBreak</em> and a bool <em>linkUnderline</em>. <em>linkColor</em> is only provided for compatibility, but has no effect,
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as <a href="tqcolorgroup.html">TQColorGroup</a>'s <a href="tqcolorgroup.html#link">TQColorGroup::link</a>() color is used now.
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<p> <em>context</em> is the optional context of the rich text object. This
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becomes important if <em>text</em> contains relative references, for
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example within image tags. TQSimpleRichText always uses the default
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mime source factory (see <a href="tqmimesourcefactory.html#defaultFactory">TQMimeSourceFactory::defaultFactory</a>())
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to resolve those references. The context will then be used to
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calculate the absolute path. See
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<a href="tqmimesourcefactory.html#makeAbsolute">TQMimeSourceFactory::makeAbsolute</a>() for details.
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<p> The <em>sheet</em> is an optional style sheet. If it is 0, the default
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style sheet will be used (see <a href="tqstylesheet.html#defaultSheet">TQStyleSheet::defaultSheet</a>()).
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<p> This constructor is useful for creating a TQSimpleRichText object
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suitable for printing. Set <em>pageBreak</em> to be the height of the
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contents area of the pages.
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<h3 class=fn><a name="~TQSimpleRichText"></a>TQSimpleRichText::~TQSimpleRichText ()
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</h3>
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Destroys the rich text object, freeing memory.
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<h3 class=fn>void <a name="adjustSize"></a>TQSimpleRichText::adjustSize ()
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</h3>
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Adjusts the richt text object to a reasonable size.
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<p> <p>See also <a href="#setWidth">setWidth</a>().
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<h3 class=fn><a href="tqstring.html">TQString</a> <a name="anchorAt"></a>TQSimpleRichText::anchorAt ( const <a href="tqpoint.html">TQPoint</a> & pos ) const
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</h3>
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Returns the anchor at the requested position, <em>pos</em>. An empty
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string is returned if no anchor is specified for this position.
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<h3 class=fn><a href="tqstring.html">TQString</a> <a name="context"></a>TQSimpleRichText::context () const
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</h3>
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Returns the context of the rich text object. If no context has
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been specified in the constructor, a null string is returned. The
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context is the path to use to look up relative links, such as
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image tags and anchor references.
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<h3 class=fn>void <a name="draw"></a>TQSimpleRichText::draw ( <a href="tqpainter.html">TQPainter</a> * p, int x, int y, const <a href="tqrect.html">TQRect</a> & clipRect, const <a href="tqcolorgroup.html">TQColorGroup</a> & cg, const <a href="tqbrush.html">TQBrush</a> * paper = 0 ) const
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</h3>
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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 the
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rich text object's coordinates translated by (<em>x</em>, <em>y</em>). Passing
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an null rectangle results in no clipping. Colors from the color
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group <em>cg</em> are used as needed, and if not 0, <em>*paper</em> is used as
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the background brush.
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<p> Note that the display code is highly optimized to reduce flicker,
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so passing a brush for <em>paper</em> is preferable to simply clearing
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the area to be painted and then calling this without a brush.
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<p>Examples: <a href="tqaction-application-example.html#x1158">action/application.cpp</a>, <a href="simple-application-example.html#x1576">application/application.cpp</a>, <a href="helpviewer-example.html#x1014">helpviewer/helpwindow.cpp</a>, and <a href="mdi-example.html#x2061">mdi/application.cpp</a>.
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<h3 class=fn>void <a name="draw-2"></a>TQSimpleRichText::draw ( <a href="tqpainter.html">TQPainter</a> * p, int x, int y, const <a href="tqregion.html">TQRegion</a> & clipRegion, const <a href="tqcolorgroup.html">TQColorGroup</a> & cg, const <a href="tqbrush.html">TQBrush</a> * paper = 0 ) const
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</h3>
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<p> <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> Use the version with clipRect instead. The region version has
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problems with larger documents on some platforms (on X11 regions
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internally are represented with 16bit coordinates).
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<h3 class=fn>int <a name="height"></a>TQSimpleRichText::height () const
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</h3>
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Returns the height of the rich text object in pixels.
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<p> <p>See also <a href="#setWidth">setWidth</a>().
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<p>Examples: <a href="tqaction-application-example.html#x1159">action/application.cpp</a>, <a href="simple-application-example.html#x1577">application/application.cpp</a>, <a href="helpviewer-example.html#x1015">helpviewer/helpwindow.cpp</a>, and <a href="mdi-example.html#x2062">mdi/application.cpp</a>.
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<h3 class=fn>bool <a name="inText"></a>TQSimpleRichText::inText ( const <a href="tqpoint.html">TQPoint</a> & pos ) const
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</h3>
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Returns TRUE if <em>pos</em> is within a text line of the rich text
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object; otherwise returns FALSE.
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<h3 class=fn>void <a name="setDefaultFont"></a>TQSimpleRichText::setDefaultFont ( const <a href="tqfont.html">TQFont</a> & f )
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</h3>
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Sets the default font for the rich text object to <em>f</em>
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<h3 class=fn>void <a name="setWidth"></a>TQSimpleRichText::setWidth ( <a href="tqpainter.html">TQPainter</a> * p, int w )
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</h3>
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Sets the width of the rich text object to <em>w</em> pixels,
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recalculating the layout as if it were to be drawn with painter <em>p</em>.
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<p> Passing a painter is useful when you intend drawing on devices
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other than the screen, for example a <a href="tqprinter.html">TQPrinter</a>.
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<p> <p>See also <a href="#height">height</a>() and <a href="#adjustSize">adjustSize</a>().
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<p>Examples: <a href="tqaction-application-example.html#x1160">action/application.cpp</a>, <a href="simple-application-example.html#x1578">application/application.cpp</a>, <a href="helpviewer-example.html#x1016">helpviewer/helpwindow.cpp</a>, and <a href="mdi-example.html#x2063">mdi/application.cpp</a>.
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<h3 class=fn>void <a name="setWidth-2"></a>TQSimpleRichText::setWidth ( int w )
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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> Sets the width of the rich text object to <em>w</em> pixels.
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<p> <p>See also <a href="#height">height</a>() and <a href="#adjustSize">adjustSize</a>().
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<h3 class=fn>int <a name="width"></a>TQSimpleRichText::width () const
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</h3>
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Returns the set width of the rich text object in pixels.
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<p> <p>See also <a href="#widthUsed">widthUsed</a>().
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<h3 class=fn>int <a name="widthUsed"></a>TQSimpleRichText::widthUsed () const
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</h3>
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Returns the width in pixels that is actually used by the rich text
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object. This can be smaller or wider than the set width.
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<p> It may be wider, for example, if the text contains images or
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non-breakable words that are already wider than the available
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space. It's smaller when the object only consists of lines that do
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not fill the width completely.
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<p> <p>See also <a href="#width">width</a>().
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<!-- eof -->
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<hr><p>
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This file is part of the <a href="index.html">TQt toolkit</a>.
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Copyright © 1995-2007
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<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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</table></div></address></body>
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</html>
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