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<li class="level1"><a href="#using-html-markup-in-text-widgets">Using HTML Markup in Text Widgets</a></li>
<li class="level1"><a href="#supported-tags">Supported Tags</a></li>
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<h1 class="title">Supported HTML Subset</h1>
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<!-- $$$richtext-html-subset.html-description -->
<div class="descr"> <a name="details"></a>
<p>Qt's text widgets are able to display rich text, specified using a subset of <a href="http://www.w3.org/TR/html401/">HTML 4</a> markup. Widgets that use <a href="qtextdocument.html">QTextDocument</a>, such as <a href="qlabel.html">QLabel</a> and <a href="qtextedit.html">QTextEdit</a>, are able to display rich text specified in this way.</p>
<a name="using-html-markup-in-text-widgets"></a>
<h2>Using HTML Markup in Text Widgets</h2>
<p>Widgets automatically detect HTML markup and display rich text accordingly. For example, setting a label's <a href="qlabel.html#text-prop">text</a> property with the string <tt>"<b>Hello</b> <i>Qt!</i>"</tt> will result in the label displaying text like this: <b>Hello</b> <i>Qt!</i></p>
<p>When HTML markup is used for text, Qt follows the rules defined by the <a href="http://www.w3.org/TR/html401/">HTML 4</a> specification. This includes default properties for text layout, such as the direction of the text flow (left-to-right) which can be changed by applying the <a href="#block-attributes"><tt>dir</tt></a> attribute to blocks of text.</p>
<a name="supported-tags"></a>
<h2>Supported Tags</h2>
<p>The following table lists the HTML tags supported by Qt's <a href="richtext.html">rich text</a> engine:</p>
<table class="generic">
<thead><tr class="qt-style"><th >Tag</th><th >Description</th><th >Comment</th></tr></thead>
<tr valign="top" class="odd"><td ><tt>a</tt></td><td >Anchor or link</td><td >Supports the <tt>href</tt> and <tt>name</tt> attributes. Note that the <tt>:visited</tt> selector is one of those that is not supported by the rich text engine. See <a href="#supported-css-selectors">below</a> for a list of others.</td></tr>
<tr valign="top" class="even"><td ><tt>address</tt></td><td >Address</td><td ></td></tr>
<tr valign="top" class="odd"><td ><tt>b</tt></td><td >Bold</td><td ></td></tr>
<tr valign="top" class="even"><td ><tt>big</tt></td><td >Larger font</td><td ></td></tr>
<tr valign="top" class="odd"><td ><tt>blockquote</tt></td><td >Indented paragraph</td><td ></td></tr>
<tr valign="top" class="even"><td ><tt>body</tt></td><td >Document body</td><td >Supports the <tt>bgcolor</tt> attribute, which can be a Qt <a href="qcolor.html#setNamedColor">color name</a> or a <tt>#RRGGBB</tt> color specification.</td></tr>
<tr valign="top" class="odd"><td ><tt>br</tt></td><td >Line break</td><td ></td></tr>
<tr valign="top" class="even"><td ><tt>center</tt></td><td >Centered paragraph</td><td ></td></tr>
<tr valign="top" class="odd"><td ><tt>cite</tt></td><td >Inline citation</td><td >Same as <tt>i</tt>.</td></tr>
<tr valign="top" class="even"><td ><tt>code</tt></td><td >Code</td><td >Same as <tt>tt</tt>.</td></tr>
<tr valign="top" class="odd"><td ><tt>dd</tt></td><td >Definition data</td><td ></td></tr>
<tr valign="top" class="even"><td ><tt>dfn</tt></td><td >Definition</td><td >Same as <tt>i</tt>.</td></tr>
<tr valign="top" class="odd"><td ><tt>div</tt></td><td >Document division</td><td >Supports the standard <a href="#block-attributes">block attributes</a>.</td></tr>
<tr valign="top" class="even"><td ><tt>dl</tt></td><td >Definition list</td><td >Supports the standard <a href="#block-attributes">block attributes</a>.</td></tr>
<tr valign="top" class="odd"><td ><tt>dt</tt></td><td >Definition term</td><td >Supports the standard <a href="#block-attributes">block attributes</a>.</td></tr>
<tr valign="top" class="even"><td ><tt>em</tt></td><td >Emphasized</td><td >Same as <tt>i</tt>.</td></tr>
<tr valign="top" class="odd"><td ><tt>font</tt></td><td >Font size, family, and/or color</td><td >Supports the following attributes: <tt>size</tt>, <tt>face</tt>, and <tt>color</tt> (Qt <a href="qcolor.html#setNamedColor">color names</a> or <tt>#RRGGBB</tt>).</td></tr>
<tr valign="top" class="even"><td ><tt>h1</tt></td><td >Level 1 heading</td><td >Supports the standard <a href="#block-attributes">block attributes</a>.</td></tr>
<tr valign="top" class="odd"><td ><tt>h2</tt></td><td >Level 2 heading</td><td >Supports the standard <a href="#block-attributes">block attributes</a>.</td></tr>
<tr valign="top" class="even"><td ><tt>h3</tt></td><td >Level 3 heading</td><td >Supports the standard <a href="#block-attributes">block attributes</a>.</td></tr>
<tr valign="top" class="odd"><td ><tt>h4</tt></td><td >Level 4 heading</td><td >Supports the standard <a href="#block-attributes">block attributes</a>.</td></tr>
<tr valign="top" class="even"><td ><tt>h5</tt></td><td >Level 5 heading</td><td >Supports the standard <a href="#block-attributes">block attributes</a>.</td></tr>
<tr valign="top" class="odd"><td ><tt>h6</tt></td><td >Level 6 heading</td><td >Supports the standard <a href="#block-attributes">block attributes</a>.</td></tr>
<tr valign="top" class="even"><td ><tt>head</tt></td><td >Document header</td><td ></td></tr>
<tr valign="top" class="odd"><td ><tt>hr</tt></td><td >Horizontal line</td><td >Supports the <tt>width</tt> attribute, which can be specified as an absolute or relative (<tt>%</tt>) value.</td></tr>
<tr valign="top" class="even"><td ><tt>html</tt></td><td >HTML document</td><td ></td></tr>
<tr valign="top" class="odd"><td ><tt>i</tt></td><td >Italic</td><td ></td></tr>
<tr valign="top" class="even"><td ><tt>img</tt></td><td >Image</td><td >Supports the <tt>src</tt>, <tt>source</tt> (for Qt 3 compatibility), <tt>width</tt>, and <tt>height</tt> attributes.</td></tr>
<tr valign="top" class="odd"><td ><tt>kbd</tt></td><td >User-entered text</td><td ></td></tr>
<tr valign="top" class="even"><td ><tt>meta</tt></td><td >Meta-information</td><td >If a text encoding is specified using the <tt>meta</tt> tag, it is picked up by Qt::codecForHtml(). Likewise, if an encoding is specified to <a href="qtextdocument.html#toHtml">QTextDocument::toHtml</a>(), the encoding is stored using a <tt>meta</tt> tag, for example:<pre class="cpp"> <meta http-equiv="Content-Type" content="text/html; charset=EUC-JP" /></pre>
</td></tr>
<tr valign="top" class="odd"><td ><tt>li</tt></td><td >List item</td><td ></td></tr>
<tr valign="top" class="even"><td ><tt>nobr</tt></td><td >Non-breakable text</td><td ></td></tr>
<tr valign="top" class="odd"><td ><tt>ol</tt></td><td >Ordered list</td><td >Supports the standard <a href="#list-attributes">list attributes</a>.</td></tr>
<tr valign="top" class="even"><td ><tt>p</tt></td><td >Paragraph</td><td >Left-aligned by default. Supports the standard <a href="#block-attributes">block attributes</a>.</td></tr>
<tr valign="top" class="odd"><td ><tt>pre</tt></td><td >Preformated text</td><td ></td></tr>
<tr valign="top" class="even"><td ><tt>qt</tt></td><td >Qt rich-text document</td><td >Synonym for <tt>html</tt>. Provided for compatibility with earlier versions of Qt.</td></tr>
<tr valign="top" class="odd"><td ><tt>s</tt></td><td >Strikethrough</td><td ></td></tr>
<tr valign="top" class="even"><td ><tt>samp</tt></td><td >Sample code</td><td >Same as <tt>tt</tt>.</td></tr>
<tr valign="top" class="odd"><td ><tt>small</tt></td><td >Small font</td><td ></td></tr>
<tr valign="top" class="even"><td ><tt>span</tt></td><td >Grouped elements</td><td ></td></tr>
<tr valign="top" class="odd"><td ><tt>strong</tt></td><td >Strong</td><td >Same as <tt>b</tt>.</td></tr>
<tr valign="top" class="even"><td ><tt>style</tt></td><td >Style sheet</td><td >Allows styling information to be included with the rich text. A <a href="#css-properties">limited subset of CSS syntax</a> can be used to change the appearance of the text.</td></tr>
<tr valign="top" class="odd"><td ><tt>sub</tt></td><td >Subscript</td><td ></td></tr>
<tr valign="top" class="even"><td ><tt>sup</tt></td><td >Superscript</td><td ></td></tr>
<tr valign="top" class="odd"><td ><tt>table</tt></td><td >Table</td><td >Supports the following attributes: <tt>border</tt>, <tt>bgcolor</tt> (Qt <a href="qcolor.html#setNamedColor">color names</a> or <tt>#RRGGBB</tt>), <tt>cellspacing</tt>, <tt>cellpadding</tt>, <tt>width</tt> (absolute or relative), and <tt>height</tt>.</td></tr>
<tr valign="top" class="even"><td ><tt>tbody</tt></td><td >Table body</td><td >Does nothing.</td></tr>
<tr valign="top" class="odd"><td ><tt>td</tt></td><td >Table data cell</td><td >Supports the standard <a href="#table-cell-attributes">table cell attributes</a>.</td></tr>
<tr valign="top" class="even"><td ><tt>tfoot</tt></td><td >Table footer</td><td >Does nothing.</td></tr>
<tr valign="top" class="odd"><td ><tt>th</tt></td><td >Table header cell</td><td >Supports the standard <a href="#table-cell-attributes">table cell attributes</a>.</td></tr>
<tr valign="top" class="even"><td ><tt>thead</tt></td><td >Table header</td><td >If the <tt>thead</tt> tag is specified, it is used when printing tables that span multiple pages.</td></tr>
<tr valign="top" class="odd"><td ><tt>title</tt></td><td >Document title</td><td >The value specified using the <tt>title</tt> tag is available through <a href="qtextdocument.html#metaInformation">QTextDocument::metaInformation</a>().</td></tr>
<tr valign="top" class="even"><td ><tt>tr</tt></td><td >Table row</td><td >Supports the <tt>bgcolor</tt> attribute, which can be a Qt <a href="qcolor.html#setNamedColor">color name</a> or a <tt>#RRGGBB</tt> color specification.</td></tr>
<tr valign="top" class="odd"><td ><tt>tt</tt></td><td >Typewrite font</td><td ></td></tr>
<tr valign="top" class="even"><td ><tt>u</tt></td><td >Underlined</td><td ></td></tr>
<tr valign="top" class="odd"><td ><tt>ul</tt></td><td >Unordered list</td><td >Supports the standard <a href="#list-attributes">list attributes</a>.</td></tr>
<tr valign="top" class="even"><td ><tt>var</tt></td><td >Variable</td><td >Same as <tt>i</tt>.</td></tr>
</table>
<a name="block-attributes"></a>
<h2>Block Attributes</h2>
<p>The following attributes are supported by the <tt>div</tt>, <tt>dl</tt>, <tt>dt</tt>, <tt>h1</tt>, <tt>h2</tt>, <tt>h3</tt>, <tt>h4</tt>, <tt>h5</tt>, <tt>h6</tt>, <tt>p</tt> tags:</p>
<ul>
<li><tt>align</tt> (<tt>left</tt>, <tt>right</tt>, <tt>center</tt>, <tt>justify</tt>)</li>
<li><tt>dir</tt> (<tt>ltr</tt>, <tt>rtl</tt>)</li>
</ul>
<a name="list-attributes"></a>
<h2>List Attributes</h2>
<p>The following attribute is supported by the <tt>ol</tt> and <tt>ul</tt> tags:</p>
<ul>
<li><tt>type</tt> (<tt>1</tt>, <tt>a</tt>, <tt>A</tt>, <tt>square</tt>, <tt>disc</tt>, <tt>circle</tt>)</li>
</ul>
<a name="table-cell-attributes"></a>
<h2>Table Cell Attributes</h2>
<p>The following attributes are supported by the <tt>td</tt> and <tt>th</tt> tags:</p>
<ul>
<li><tt>width</tt> (absolute, relative, or no-value)</li>
<li><tt>bgcolor</tt> (Qt <a href="qcolor.html#setNamedColor">color names</a> or <tt>#RRGGBB</tt>)</li>
<li><tt>colspan</tt></li>
<li><tt>rowspan</tt></li>
<li><tt>align</tt> (<tt>left</tt>, <tt>right</tt>, <tt>center</tt>, <tt>justify</tt>)</li>
<li><tt>valign</tt> (<tt>top</tt>, <tt>middle</tt>, <tt>bottom</tt>)</li>
</ul>
<a name="css-properties"></a>
<h2>CSS Properties</h2>
<p>The following table lists the CSS properties supported by Qt's <a href="richtext.html">rich text</a> engine:</p>
<table class="generic">
<thead><tr class="qt-style"><th >Property</th><th >Values</th><th >Description</th></tr></thead>
<tr valign="top" class="odd"><td ><tt>background-color</tt></td><td ><color></td><td >Background color for elements</td></tr>
<tr valign="top" class="even"><td ><tt>background-image</tt></td><td ><uri></td><td >Background image for elements</td></tr>
<tr valign="top" class="odd"><td ><tt>color</tt></td><td ><color></td><td >Text foreground color</td></tr>
<tr valign="top" class="even"><td ><tt>font-family</tt></td><td ><family name></td><td >Font family name</td></tr>
<tr valign="top" class="odd"><td ><tt>font-size</tt></td><td >[ small | medium | large | x-large | xx-large ] | <size>pt | <size>px</td><td >Font size relative to the document font, or specified in points or pixels</td></tr>
<tr valign="top" class="even"><td ><tt>font-style</tt></td><td >[ normal | italic | oblique ]</td><td ></td></tr>
<tr valign="top" class="odd"><td ><tt>font-weight</tt></td><td >[ normal | bold | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 ]</td><td >Specifies the font weight used for text, where <tt>normal</tt> and <tt>bold</tt> are mapped to the corresponding <a href="qfont.html">QFont</a> weights. Numeric values are 8 times the equivalent <a href="qfont.html">QFont</a> weight values.</td></tr>
<tr valign="top" class="even"><td ><tt>text-decoration</tt></td><td >none | [ underline || overline || line-through ]</td><td >Additional text effects</td></tr>
<tr valign="top" class="odd"><td ><tt>font</tt></td><td >[ [ <'font-style'> || <'font-weight'> ]? <'font-size'> <'font-family'> ]</td><td >Font shorthand property</td></tr>
<tr valign="top" class="even"><td ><tt>text-indent</tt></td><td ><length>px</td><td >First line text indentation in pixels</td></tr>
<tr valign="top" class="odd"><td ><tt>white-space</tt></td><td >normal | pre | nowrap | pre-wrap</td><td >Declares how whitespace in HTML is handled.</td></tr>
<tr valign="top" class="even"><td ><tt>margin-top</tt></td><td ><length>px</td><td >Top paragraph margin in pixels</td></tr>
<tr valign="top" class="odd"><td ><tt>margin-bottom</tt></td><td ><length>px</td><td >Bottom paragraph margin in pixels</td></tr>
<tr valign="top" class="even"><td ><tt>margin-left</tt></td><td ><length>px</td><td >Left paragraph margin in pixels</td></tr>
<tr valign="top" class="odd"><td ><tt>margin-right</tt></td><td ><length>px</td><td >Right paragraph margin in pixels</td></tr>
<tr valign="top" class="even"><td ><tt>padding-top</tt></td><td ><length>px</td><td >Top table cell padding in pixels</td></tr>
<tr valign="top" class="odd"><td ><tt>padding-bottom</tt></td><td ><length>px</td><td >Bottom table cell padding in pixels</td></tr>
<tr valign="top" class="even"><td ><tt>padding-left</tt></td><td ><length>px</td><td >Left table cell padding in pixels</td></tr>
<tr valign="top" class="odd"><td ><tt>padding-right</tt></td><td ><length>px</td><td >Right table cell padding in pixels</td></tr>
<tr valign="top" class="even"><td ><tt>padding</tt></td><td ><length>px</td><td >Shorthand for setting all the padding properties at once.</td></tr>
<tr valign="top" class="odd"><td ><tt>vertical-align</tt></td><td >baseline | sub | super | middle | top | bottom</td><td >Vertical text alignment. For vertical alignment in text table cells only middle, top, and bottom apply.</td></tr>
<tr valign="top" class="even"><td ><tt>border-color</tt></td><td ><color></td><td >Border color for text tables.</td></tr>
<tr valign="top" class="odd"><td ><tt>border-style</tt></td><td >none | dotted | dashed | dot-dash | dot-dot-dash | solid | double | groove | ridge | inset | outset</td><td >Border style for text tables.</td></tr>
<tr valign="top" class="even"><td ><tt>background</tt></td><td >[ <'background-color'> || <'background-image'> ]</td><td >Background shorthand property</td></tr>
<tr valign="top" class="odd"><td ><tt>page-break-before</tt></td><td >[ auto | always ]</td><td >Make it possible to enforce a page break before the paragraph/table</td></tr>
<tr valign="top" class="even"><td ><tt>page-break-after</tt></td><td >[ auto | always ]</td><td >Make it possible to enforce a page break after the paragraph/table</td></tr>
<tr valign="top" class="odd"><td >float</td><td >[ left | right | none ]</td><td >Specifies where an image or a text will be placed in another element. Note that the <tt>float</tt> property is only supported for tables and images.</td></tr>
<tr valign="top" class="even"><td ><tt>text-transform</tt></td><td >[ uppercase | lowercase ]</td><td >Select the transformation that will be performed on the text prior to displaying it.</td></tr>
<tr valign="top" class="odd"><td ><tt>font-variant</tt></td><td >small-caps</td><td >Perform the smallcaps transformation on the text prior to displaying it.</td></tr>
<tr valign="top" class="even"><td ><tt>word-spacing</tt></td><td ><width>px</td><td >Specifies an alternate spacing between each word.</td></tr>
</table>
<a name="supported-css-selectors"></a>
<h2>Supported CSS Selectors</h2>
<p>All CSS 2.1 selector classes are supported except pseudo-class selectors such as <tt>:first-child</tt>, <tt>:visited</tt> and <tt>:hover</tt>.</p>
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