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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Qt Toolkit - QVariant Class</title><style type="text/css"><!--
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<a href="classes.html"><b>Classes</b></a>
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<h1 align=center>QVariant Class Reference</h1><br clear="all">
<p>
Acts like a union for the most common Qt data types.
<a href="#details">More...</a>
<p>
<code>#include <<a href="qvariant-h.html">qvariant.h</a>></code>
<p><a href="qvariant-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li><div class="fn">enum<a href="#Type"><b>Type</b></a>{Invalid, Map, List, String, StringList, Font, Pixmap, Brush, Rect, Size, Color, Palette, ColorGroup, IconSet, Point, Image, Int, UInt, Bool, Double, CString, PointArray, Region, Bitmap, Cursor, SizePolicy}</div>
<li><div class="fn"><a href="#0c2f9f"><b>QVariant</b></a>()</div>
<li><div class="fn"><a href="#309b48"><b>~QVariant</b></a>()</div>
<li><div class="fn"><a href="#a9dd87"><b>QVariant</b></a>(constQVariant&)</div>
<li><div class="fn"><a href="#945e57"><b>QVariant</b></a>(QDataStream&s)</div>
<li><div class="fn"><a href="#13e23e"><b>QVariant</b></a>(constQString&)</div>
<li><div class="fn"><a href="#caa2ac"><b>QVariant</b></a>(constQCString&)</div>
<li><div class="fn"><a href="#45e17b"><b>QVariant</b></a>(constchar*)</div>
<li><div class="fn"><a href="#d384ed"><b>QVariant</b></a>(constQStringList&)</div>
<li><div class="fn"><a href="#6ea459"><b>QVariant</b></a>(constQFont&)</div>
<li><div class="fn"><a href="#5e1bf3"><b>QVariant</b></a>(constQPixmap&)</div>
<li><div class="fn"><a href="#0811eb"><b>QVariant</b></a>(constQImage&)</div>
<li><div class="fn"><a href="#539895"><b>QVariant</b></a>(constQBrush&)</div>
<li><div class="fn"><a href="#d6f864"><b>QVariant</b></a>(constQPoint&)</div>
<li><div class="fn"><a href="#774b91"><b>QVariant</b></a>(constQRect&)</div>
<li><div class="fn"><a href="#765d72"><b>QVariant</b></a>(constQSize&)</div>
<li><div class="fn"><a href="#74976f"><b>QVariant</b></a>(constQColor&)</div>
<li><div class="fn"><a href="#3da519"><b>QVariant</b></a>(constQPalette&)</div>
<li><div class="fn"><a href="#639ca4"><b>QVariant</b></a>(constQColorGroup&)</div>
<li><div class="fn"><a href="#6578a0"><b>QVariant</b></a>(constQIconSet&)</div>
<li><div class="fn"><a href="#7913d8"><b>QVariant</b></a>(constQPointArray&)</div>
<li><div class="fn"><a href="#4f7d55"><b>QVariant</b></a>(constQRegion&)</div>
<li><div class="fn"><a href="#1bfafc"><b>QVariant</b></a>(constQBitmap&)</div>
<li><div class="fn"><a href="#664a1b"><b>QVariant</b></a>(constQCursor&)</div>
<li><div class="fn"><a href="#c86c8f"><b>QVariant</b></a>(constQValueList<QVariant>&)</div>
<li><div class="fn"><a href="#df0a8b"><b>QVariant</b></a>(constQMap<QString, QVariant>&)</div>
<li><div class="fn"><a href="#368bab"><b>QVariant</b></a>(int)</div>
<li><div class="fn"><a href="#3862d2"><b>QVariant</b></a>(uint)</div>
<li><div class="fn"><a href="#49aa35"><b>QVariant</b></a>(bool, int)</div>
<li><div class="fn"><a href="#d68143"><b>QVariant</b></a>(double)</div>
<li><div class="fn"><a href="#b69b53"><b>QVariant</b></a>(QSizePolicy)</div>
<li><div class="fn">QVariant&<a href="#8aa5fa"><b>operator=</b></a>(constQVariant&)</div>
<li><div class="fn">bool<a href="#47f728"><b>operator==</b></a>(constQVariant&)const</div>
<li><div class="fn">bool<a href="#48b974"><b>operator!=</b></a>(constQVariant&)const</div>
<li><div class="fn">Type<a href="#8196d7"><b>type</b></a>()const</div>
<li><div class="fn">constchar*<a href="#9e1307"><b>typeName</b></a>()const</div>
<li><div class="fn">bool<a href="#4ccf65"><b>canCast</b></a>(Type)const</div>
<li><div class="fn">bool<a href="#83b746"><b>isValid</b></a>()const</div>
<li><div class="fn">void<a href="#4659a3"><b>clear</b></a>()</div>
<li><div class="fn">constQString<a href="#5426be"><b>toString</b></a>()const</div>
<li><div class="fn">constQCString<a href="#084552"><b>toCString</b></a>()const</div>
<li><div class="fn">constQStringList<a href="#30009b"><b>toStringList</b></a>()const</div>
<li><div class="fn">constQFont<a href="#56d093"><b>toFont</b></a>()const</div>
<li><div class="fn">constQPixmap<a href="#462574"><b>toPixmap</b></a>()const</div>
<li><div class="fn">constQImage<a href="#ffa107"><b>toImage</b></a>()const</div>
<li><div class="fn">constQBrush<a href="#e3aebe"><b>toBrush</b></a>()const</div>
<li><div class="fn">constQPoint<a href="#edca08"><b>toPoint</b></a>()const</div>
<li><div class="fn">constQRect<a href="#d01bf0"><b>toRect</b></a>()const</div>
<li><div class="fn">constQSize<a href="#b0883e"><b>toSize</b></a>()const</div>
<li><div class="fn">constQColor<a href="#f93262"><b>toColor</b></a>()const</div>
<li><div class="fn">constQPalette<a href="#95c8fb"><b>toPalette</b></a>()const</div>
<li><div class="fn">constQColorGroup<a href="#48889d"><b>toColorGroup</b></a>()const</div>
<li><div class="fn">constQIconSet<a href="#bb2dbe"><b>toIconSet</b></a>()const</div>
<li><div class="fn">constQPointArray<a href="#6f585a"><b>toPointArray</b></a>()const</div>
<li><div class="fn">constQBitmap<a href="#476835"><b>toBitmap</b></a>()const</div>
<li><div class="fn">constQRegion<a href="#79c750"><b>toRegion</b></a>()const</div>
<li><div class="fn">constQCursor<a href="#866704"><b>toCursor</b></a>()const</div>
<li><div class="fn">int<a href="#60b9a1"><b>toInt</b></a>()const</div>
<li><div class="fn">uint<a href="#4f471c"><b>toUInt</b></a>()const</div>
<li><div class="fn">bool<a href="#d5a870"><b>toBool</b></a>()const</div>
<li><div class="fn">double<a href="#96e514"><b>toDouble</b></a>()const</div>
<li><div class="fn">constQValueList<QVariant><a href="#d15e4b"><b>toList</b></a>()const</div>
<li><div class="fn">constQMap<QString, QVariant><a href="#adc59d"><b>toMap</b></a>()const</div>
<li><div class="fn">QSizePolicy<a href="#03166c"><b>toSizePolicy</b></a>()const</div>
<li><div class="fn">QValueListConstIterator<QVariant><a href="#6b77e5"><b>listBegin</b></a>()const</div>
<li><div class="fn">QValueListConstIterator<QVariant><a href="#132659"><b>listEnd</b></a>()const</div>
<li><div class="fn">QValueListConstIterator<QString><a href="#2a8e53"><b>stringListBegin</b></a>()const</div>
<li><div class="fn">QValueListConstIterator<QString><a href="#83e7d9"><b>stringListEnd</b></a>()const</div>
<li><div class="fn">QMapConstIterator<QString, QVariant><a href="#1d6d96"><b>mapBegin</b></a>()const</div>
<li><div class="fn">QMapConstIterator<QString, QVariant><a href="#8d3b3d"><b>mapEnd</b></a>()const</div>
<li><div class="fn">QMapConstIterator<QString, QVariant><a href="#7b5d04"><b>mapFind</b></a>(constQString&)const</div>
<li><div class="fn">QString&<a href="#7e2926"><b>asString</b></a>()</div>
<li><div class="fn">QCString&<a href="#992d98"><b>asCString</b></a>()</div>
<li><div class="fn">QStringList&<a href="#5a07d2"><b>asStringList</b></a>()</div>
<li><div class="fn">QFont&<a href="#f2d6ac"><b>asFont</b></a>()</div>
<li><div class="fn">QPixmap&<a href="#07429d"><b>asPixmap</b></a>()</div>
<li><div class="fn">QImage&<a href="#34b17c"><b>asImage</b></a>()</div>
<li><div class="fn">QBrush&<a href="#322fc5"><b>asBrush</b></a>()</div>
<li><div class="fn">QPoint&<a href="#2e4245"><b>asPoint</b></a>()</div>
<li><div class="fn">QRect&<a href="#54717f"><b>asRect</b></a>()</div>
<li><div class="fn">QSize&<a href="#53f9de"><b>asSize</b></a>()</div>
<li><div class="fn">QColor&<a href="#d4c8c5"><b>asColor</b></a>()</div>
<li><div class="fn">QPalette&<a href="#81d9be"><b>asPalette</b></a>()</div>
<li><div class="fn">QColorGroup&<a href="#1581da"><b>asColorGroup</b></a>()</div>
<li><div class="fn">QIconSet&<a href="#8a44b8"><b>asIconSet</b></a>()</div>
<li><div class="fn">QPointArray&<a href="#95e164"><b>asPointArray</b></a>()</div>
<li><div class="fn">QBitmap&<a href="#6f2eab"><b>asBitmap</b></a>()</div>
<li><div class="fn">QRegion&<a href="#8e37ae"><b>asRegion</b></a>()</div>
<li><div class="fn">QCursor&<a href="#0b0158"><b>asCursor</b></a>()</div>
<li><div class="fn">int&<a href="#661337"><b>asInt</b></a>()</div>
<li><div class="fn">uint&<a href="#ae6a9a"><b>asUInt</b></a>()</div>
<li><div class="fn">bool&<a href="#4cc01a"><b>asBool</b></a>()</div>
<li><div class="fn">double&<a href="#5c41ed"><b>asDouble</b></a>()</div>
<li><div class="fn">QValueList<QVariant>&<a href="#e4b39f"><b>asList</b></a>()</div>
<li><div class="fn">QMap<QString, QVariant>&<a href="#c0c819"><b>asMap</b></a>()</div>
<li><div class="fn">QSizePolicy&<a href="#787f45"><b>asSizePolicy</b></a>()</div>
<li><div class="fn">void<a href="#4fa057"><b>load</b></a>(QDataStream&)</div>
<li><div class="fn">void<a href="#a96bb4"><b>save</b></a>(QDataStream&)const</div>
</ul>
<h2>Static Public Members</h2>
<ul>
<li><div class="fn">constchar*<a href="#800071"><b>typeToName</b></a>(Typetyp)</div>
<li><div class="fn">Type<a href="#96fb68"><b>nameToType</b></a>(constchar*name)</div>
</ul>
<hr><h2><a name="details"></a>Detailed Description</h2>
Acts like a union for the most common Qt data types.
<p>
Since C++ forbids unions from including types that have non-default
constructors or destructors, most interesting Qt classes cannot be
used in unions. This is a problem when using <a href="qobject.html#d1c761">QObject::property</a>(),
among other things.
<p>This class provides union functionality for property() and most
other needs that might be solved by a union including e.g. <a href="qwidget.html">QWidget</a>.
<p>A QVariant object can hold any one <a href="#8196d7">type</a>() at a time, and you can
find out what type it holds, convert it to a different type using
e.g. <a href="#53f9de">asSize</a>(), get its value using e.g. <a href="#b0883e">toSize</a>(), and check whether
the type can be converted to e.g. <a href="qsize.html">QSize</a> using <a href="#4ccf65">canCast</a>().
<p>The methods named toT() (for any supported T, see the <a href="#Type">Type</a>
documentation for a list) are const. If you ask for the stored type,
they return a copy of the stored object. If you ask for a type
which can be generated from the stored type, toT() copies and
converts, and leaves the object itself unchanged. If you ask for a
type that cannot be generated from the stored type, the result
depends on the type, see the function documentation for details.
<p>Note that three data types supported by QVariant are explicitly
shared, namely <a href="qimage.html">QImage</a>, <a href="qpointarray.html">QPointArray</a>, and <a href="qcstring.html">QCString</a>, and in these cases
the toT() methods return a shallow copy. In almost all cases, you
must make a deep copy of the returned values before modifying them.
<p>The methods named asT() are not const. They do conversion like toT()
methods, set the variant to hold the converted value, and return a
reference to the new contents of the variant.
<p>Here is some example code to demonstrate use of QVariant:
<p><pre> <a href="qdatastream.html">QDataStream</a> out(...);
<a href="qvariant.html">QVariant</a> v(123); // The variant now contains an int
int x = v.<a href="#60b9a1">toInt</a>(); // x = 123
out << v; // Writes a type tag and an int to out
v = QVariant("hello"); // The variant now contains a QCString
v = QVariant(tr("hello"));// The variant now contains a QString
int y = v.<a href="#60b9a1">toInt</a>(); // y = 0 since v cannot be converted to an int
<a href="qstring.html">QString</a> s = v.<a href="#5426be">toString</a>(); // s = tr("hello") (see QObject::tr())
out << v; // Writes a type tag and a QString to out
...
<a href="qdatastream.html">QDataStream</a> in(...); // (opening the previously written stream)
in >> v; // Reads an Int variant
int z = v.<a href="#60b9a1">toInt</a>(); // z = 123
<a href="qapplication.html#3db6b2">qDebug</a>("Type is %s", // prints "Type is int"
v.<a href="#9e1307">typeName</a>());
v.<a href="#661337">asInt</a>() += 100; // The variant now hold the value 223.
v = QVariant( <a href="qstringlist.html">QStringList</a>() );
v.<a href="#5a07d2">asStringList</a>().append( "Hallo" );
</pre>
<p>You can even have a <a href="qvaluelist.html">QValueList</a><QVariant> stored in the variant -
giving arbitrarily complex data values with lists of variants, some
of which are strings while others are integers and other still are
lists of lists of lists of variants. This is very powerful, and you
can easily shoot yourself in the foot with all this power. Caveat
programmor.
<hr><h2>Member Type Documentation</h2>
<h3 class="fn"><a name="Type">QVariant::Type</a></h3>
This enum type defines the types of variable that a QVariant can
contain. The supported enum values and the associated types are: <ul>
<li> <code>Invalid</code> - no type
<li> <code>List</code> - a <a href="qvaluelist.html">QValueList</a><QVariant>
<li> <code>Map</code> - a <a href="qmap.html">QMap</a><QString,QVariant>
<li> <code>String</code> - a <a href="qstring.html">QString</a>
<li> <code>StringList</code> - a <a href="qstringlist.html">QStringList</a>
<li> <code>Font</code> - a <a href="qfont.html">QFont</a>
<li> <code>Pixmap</code> - a <a href="qpixmap.html">QPixmap</a>
<li> <code>Brush</code> - a <a href="qbrush.html">QBrush</a>
<li> <code>Rect</code> - a <a href="qrect.html">QRect</a>
<li> <code>Size</code> - a <a href="qsize.html">QSize</a>
<li> <code>Color</code> - a <a href="qcolor.html">QColor</a>
<li> <code>Palette</code> - a <a href="qpalette.html">QPalette</a>
<li> <code>ColorGroup</code> - a <a href="qcolorgroup.html">QColorGroup</a>
<li> <code>IconSet</code> - a <a href="qiconset.html">QIconSet</a>
<li> <code>Point</code> - a <a href="qpoint.html">QPoint</a>
<li> <code>Image</code> - a <a href="qimage.html">QImage</a>
<li> <code>Int</code> - an int
<li> <code>UInt</code> - an unsigned int
<li> <code>Bool</code> - a bool
<li> <code>Double</code> - a doublea
<li> <code>CString</code> - a <a href="qcstring.html">QCString</a>
<li> <code>PointArray</code> - a <a href="qpointarray.html">QPointArray</a>
<li> <code>Region</code> - a <a href="qregion.html">QRegion</a>
<li> <code>Bitmap</code> - a <a href="qbitmap.html">QBitmap</a>
<li> <code>Cursor</code> - a <a href="qcursor.html">QCursor</a>
<li> <code>SizePolicy</code> - a <a href="qsizepolicy.html">QSizePolicy</a>
<p></ul>
<p>Note that Qt's definition of bool depends on the compiler.
<a href="qglobal-h.html">qglobal.h</a> has the system-dependent definition of bool.
<hr><h2>Member Function Documentation</h2>
<h3 class="fn"><a name="0c2f9f"></a>QVariant::QVariant()</h3>
<p>Constructs an invalid variant.
<h3 class="fn"><a name="945e57"></a>QVariant::QVariant(<a href="qdatastream.html">QDataStream</a>&s)</h3>
<p>Reads the variant from the data stream.
<h3 class="fn"><a name="b69b53"></a>QVariant::QVariant(<a href="qsizepolicy.html">QSizePolicy</a>val)</h3>
<p>Constructs a new variant with a size policy value.
<h3 class="fn"><a name="49aa35"></a>QVariant::QVariant(boolval, int)</h3>
<p>Constructs a new variant with a boolean value. The integer argument
is a dummy, necessary for compatibility with certain compiler that
even its mother cannot love.
<h3 class="fn"><a name="1bfafc"></a>QVariant::QVariant(const<a href="qbitmap.html">QBitmap</a>&val)</h3>
<p>Constructs a new variant with a bitmap value.
<h3 class="fn"><a name="539895"></a>QVariant::QVariant(const<a href="qbrush.html">QBrush</a>&val)</h3>
<p>Constructs a new variant with a brush value.
<h3 class="fn"><a name="74976f"></a>QVariant::QVariant(const<a href="qcolor.html">QColor</a>&val)</h3>
<p>Constructs a new variant with a color value.
<h3 class="fn"><a name="639ca4"></a>QVariant::QVariant(const<a href="qcolorgroup.html">QColorGroup</a>&val)</h3>
<p>Constructs a new variant with a color group value.
<h3 class="fn"><a name="caa2ac"></a>QVariant::QVariant(const<a href="qcstring.html">QCString</a>&val)</h3>
<p>Constructs a new variant with a c-string value.
<p>If you want to modify the <a href="qcstring.html">QCString</a> you pass to this constructor
after this call, we recommend passing a deep copy (see
<a href="qcstring.html#60bcfc">QCString::copy</a>()).
<h3 class="fn"><a name="664a1b"></a>QVariant::QVariant(const<a href="qcursor.html">QCursor</a>&val)</h3>
<p>Constructs a new variant with a cursor value.
<h3 class="fn"><a name="6ea459"></a>QVariant::QVariant(const<a href="qfont.html">QFont</a>&val)</h3>
<p>Constructs a new variant with a font value.
<h3 class="fn"><a name="6578a0"></a>QVariant::QVariant(const<a href="qiconset.html">QIconSet</a>&val)</h3>
<p>Constructs a new variant with an icon set value.
<h3 class="fn"><a name="0811eb"></a>QVariant::QVariant(const<a href="qimage.html">QImage</a>&val)</h3>
<p>Constructs a new variant with an image value.
<p>Since <a href="qimage.html">QImage</a> is explicitly shared you may need to pass a deep copy
to the variant using <a href="qimage.html#1bb0d4">QImage::copy</a>().
<h3 class="fn"><a name="df0a8b"></a>QVariant::QVariant(const<a href="qmap.html">QMap</a><<a href="qstring.html">QString</a>,QVariant>&val)</h3>
<p>Constructs a new variant with a map of QVariants.
<h3 class="fn"><a name="3da519"></a>QVariant::QVariant(const<a href="qpalette.html">QPalette</a>&val)</h3>
<p>Constructs a new variant with a color palette value.
<h3 class="fn"><a name="5e1bf3"></a>QVariant::QVariant(const<a href="qpixmap.html">QPixmap</a>&val)</h3>
<p>Constructs a new variant with a pixmap value.
<h3 class="fn"><a name="d6f864"></a>QVariant::QVariant(const<a href="qpoint.html">QPoint</a>&val)</h3>
<p>Constructs a new variant with a point value.
<h3 class="fn"><a name="7913d8"></a>QVariant::QVariant(const<a href="qpointarray.html">QPointArray</a>&val)</h3>
<p>Constructs a new variant with an point array value.
<p>Since <a href="qpointarray.html">QPointArray</a> is explicitly shared you may need to pass a deep copy
to the variant using <a href="qpointarray.html#1b87f6">QPointArray::copy</a>().
<h3 class="fn"><a name="774b91"></a>QVariant::QVariant(const<a href="qrect.html">QRect</a>&val)</h3>
<p>Constructs a new variant with a rect value.
<h3 class="fn"><a name="4f7d55"></a>QVariant::QVariant(const<a href="qregion.html">QRegion</a>&val)</h3>
<p>Constructs a new variant with a region.
<h3 class="fn"><a name="765d72"></a>QVariant::QVariant(const<a href="qsize.html">QSize</a>&val)</h3>
<p>Constructs a new variant with a size value.
<h3 class="fn"><a name="13e23e"></a>QVariant::QVariant(const<a href="qstring.html">QString</a>&val)</h3>
<p>Constructs a new variant with a string value.
<h3 class="fn"><a name="d384ed"></a>QVariant::QVariant(const<a href="qstringlist.html">QStringList</a>&val)</h3>
<p>Constructs a new variant with a string list value.
<h3 class="fn"><a name="c86c8f"></a>QVariant::QVariant(const<a href="qvaluelist.html">QValueList</a><QVariant>&val)</h3>
<p>Constructs a new variant with a list value.
<h3 class="fn"><a name="a9dd87"></a>QVariant::QVariant(constQVariant&p)</h3>
<p>Constructs a copy of the variant passed as argument to this
constructor. Usually this is a deep copy, but if the stored data
type is explicit shared then a shallow copy is made.
<h3 class="fn"><a name="45e17b"></a>QVariant::QVariant(constchar*val)</h3>
<p>Constructs a new variant with a c-string value, if <em>val</em> is
non-null. The variant creates a deep copy of <em>val.</em>
<p>If <em>val</em> is null, the resulting variant has type Invalid.
<h3 class="fn"><a name="d68143"></a>QVariant::QVariant(doubleval)</h3>
<p>Constructs a new variant with a floating point value.
<h3 class="fn"><a name="368bab"></a>QVariant::QVariant(intval)</h3>
<p>Constructs a new variant with an integer value.
<h3 class="fn"><a name="3862d2"></a>QVariant::QVariant(uintval)</h3>
<p>Constructs a new variant with an unsigned integer value.
<h3 class="fn"><a name="309b48"></a>QVariant::~QVariant()</h3>
<p>Destructs the QVariant and the contained object.
<p>Note that subclasses that re-implement <a href="#4659a3">clear</a>() should reimplement
the destructor to call clear(). This destructor calls clear(), but
since it is the destructor, <a href="#4659a3">QVariant::clear</a>() is called rather than
any subclass.
<h3 class="fn"><a href="qbitmap.html">QBitmap</a>&<a name="6f2eab"></a>QVariant::asBitmap()</h3>
<p>Tries to convert the variant to hold a bitmap value. If that
is not possible then the variant is set to a null bitmap.
<p>Returns a reference to the stored bitmap.
<p>See also <a href="#476835">toBitmap</a>().
<h3 class="fn">bool&<a name="4cc01a"></a>QVariant::asBool()</h3>
<p>Returns the variant's value as bool reference.
<h3 class="fn"><a href="qbrush.html">QBrush</a>&<a name="322fc5"></a>QVariant::asBrush()</h3>
<p>Tries to convert the variant to hold a brush value. If that
is not possible then the variant is set to a default black brush.
<p>Returns a reference to the stored brush.
<p>See also <a href="#e3aebe">toBrush</a>().
<h3 class="fn"><a href="qcstring.html">QCString</a>&<a name="992d98"></a>QVariant::asCString()</h3>
<p>Tries to convert the variant to hold a string value. If that
is not possible then the variant is set to an empty string.
<p>Returns a reference to the stored string.
<p>See also <a href="#084552">toCString</a>().
<h3 class="fn"><a href="qcolor.html">QColor</a>&<a name="d4c8c5"></a>QVariant::asColor()</h3>
<p>Tries to convert the variant to hold a <a href="qcolor.html">QColor</a> value. If that
is not possible then the variant is set to an invalid color.
<p>Returns a reference to the stored color.
<p>See also <a href="#f93262">toColor</a>() and <a href="qcolor.html#f7352b">QColor::isValid</a>().
<h3 class="fn"><a href="qcolorgroup.html">QColorGroup</a>&<a name="1581da"></a>QVariant::asColorGroup()</h3>
<p>Tries to convert the variant to hold a <a href="qcolorgroup.html">QColorGroup</a> value. If that
is not possible then the variant is set to a color group with all colors
set to black.
<p>Returns a reference to the stored color group.
<p>See also <a href="#48889d">toColorGroup</a>().
<h3 class="fn"><a href="qcursor.html">QCursor</a>&<a name="0b0158"></a>QVariant::asCursor()</h3>
<p>Tries to convert the variant to hold a <a href="qcursor.html">QCursor</a> value. If that
is not possible then the variant is set to a default arrow cursor.
<p>Returns a reference to the stored cursor.
<p>See also <a href="#866704">toCursor</a>().
<h3 class="fn">double&<a name="5c41ed"></a>QVariant::asDouble()</h3>
<p>Returns the variant's value as double reference.
<h3 class="fn"><a href="qfont.html">QFont</a>&<a name="f2d6ac"></a>QVariant::asFont()</h3>
<p>Tries to convert the variant to hold a <a href="qfont.html">QFont</a>. If that
is not possible then the variant is set to a default font.
<p>Returns a reference to the stored font.
<p>See also <a href="#56d093">toFont</a>().
<h3 class="fn"><a href="qiconset.html">QIconSet</a>&<a name="8a44b8"></a>QVariant::asIconSet()</h3>
<p>Tries to convert the variant to hold a <a href="qiconset.html">QIconSet</a> value. If that
is not possible then the variant is set to an empty iconset.
<p>Returns a reference to the stored iconset.
<p>See also <a href="#bb2dbe">toIconSet</a>().
<h3 class="fn"><a href="qimage.html">QImage</a>&<a name="34b17c"></a>QVariant::asImage()</h3>
<p>Tries to convert the variant to hold an image value. If that
is not possible then the variant is set to a null image.
<p>Returns a reference to the stored image.
<p>See also <a href="#ffa107">toImage</a>().
<h3 class="fn">int&<a name="661337"></a>QVariant::asInt()</h3>
<p>Returns the variant's value as int reference.
<h3 class="fn"><a href="qvaluelist.html">QValueList</a><QVariant>&<a name="e4b39f"></a>QVariant::asList()</h3>
<p>Returns the variant's value as variant list reference.
<h3 class="fn"><a href="qmap.html">QMap</a><<a href="qstring.html">QString</a>, QVariant>&<a name="c0c819"></a>QVariant::asMap()</h3>
<p>Returns the variant's value as variant map reference.
<h3 class="fn"><a href="qpalette.html">QPalette</a>&<a name="81d9be"></a>QVariant::asPalette()</h3>
<p>Tries to convert the variant to hold a <a href="qpalette.html">QPalette</a> value. If that
is not possible then the variant is set to a palette with black colors only.
<p>Returns a reference to the stored palette.
<p>See also <a href="#5426be">toString</a>().
<h3 class="fn"><a href="qpixmap.html">QPixmap</a>&<a name="07429d"></a>QVariant::asPixmap()</h3>
<p>Tries to convert the variant to hold a pixmap value. If that
is not possible then the variant is set to a null pixmap.
<p>Returns a reference to the stored pixmap.
<p>See also <a href="#462574">toPixmap</a>().
<h3 class="fn"><a href="qpoint.html">QPoint</a>&<a name="2e4245"></a>QVariant::asPoint()</h3>
<p>Tries to convert the variant to hold a point value. If that
is not possible then the variant is set to a null point.
<p>Returns a reference to the stored point.
<p>See also <a href="#edca08">toPoint</a>().
<h3 class="fn"><a href="qpointarray.html">QPointArray</a>&<a name="95e164"></a>QVariant::asPointArray()</h3>
<p>Tries to convert the variant to hold a <a href="qpointarray.html">QPointArray</a> value. If that
is not possible then the variant is set to an empty point array.
<p>Returns a reference to the stored point array.
<p>See also <a href="#6f585a">toPointArray</a>().
<h3 class="fn"><a href="qrect.html">QRect</a>&<a name="54717f"></a>QVariant::asRect()</h3>
<p>Tries to convert the variant to hold a rectangle value. If that
is not possible then the variant is set to an empty rectangle.
<p>Returns a reference to the stored rectangle.
<p>See also <a href="#d01bf0">toRect</a>().
<h3 class="fn"><a href="qregion.html">QRegion</a>&<a name="8e37ae"></a>QVariant::asRegion()</h3>
<p>Tries to convert the variant to hold a <a href="qregion.html">QRegion</a> value. If that
is not possible then the variant is set to a null region.
<p>Returns a reference to the stored region.
<p>See also <a href="#79c750">toRegion</a>().
<h3 class="fn"><a href="qsize.html">QSize</a>&<a name="53f9de"></a>QVariant::asSize()</h3>
<p>Tries to convert the variant to hold a <a href="qsize.html">QSize</a> value. If that
is not possible then the variant is set to an invalid size.
<p>Returns a reference to the stored size.
<p>See also <a href="#b0883e">toSize</a>() and <a href="qsize.html#fb07e1">QSize::isValid</a>().
<h3 class="fn"><a href="qsizepolicy.html">QSizePolicy</a>&<a name="787f45"></a>QVariant::asSizePolicy()</h3>
<p>Tries to convert the variant to hold a <a href="qsizepolicy.html">QSizePolicy</a> value. If that
fails, the variant is set to an arbitrary size policy.
<h3 class="fn"><a href="qstring.html">QString</a>&<a name="7e2926"></a>QVariant::asString()</h3>
<p>Tries to convert the variant to hold a string value. If that
is not possible then the variant is set to an empty string.
<p>Returns a reference to the stored string.
<p>See also <a href="#5426be">toString</a>().
<h3 class="fn"><a href="qstringlist.html">QStringList</a>&<a name="5a07d2"></a>QVariant::asStringList()</h3>
<p>Tries to convert the variant to hold a <a href="qstringlist.html">QStringList</a> value. If that
is not possible then the variant is set to an empty string list.
<p>Returns a reference to the stored string list.
<p>See also <a href="#30009b">toStringList</a>().
<h3 class="fn">uint&<a name="ae6a9a"></a>QVariant::asUInt()</h3>
<p>Returns the variant's value as unsigned int reference.
<h3 class="fn">bool<a name="4ccf65"></a>QVariant::canCast(<a href="qvariant.html#Type">Type</a>t)const</h3>
<p>Returns TRUE if the current type of the variant can be cast to
the requested type. Such casting is done automatically when calling
the <a href="#60b9a1">toInt</a>(), <a href="#d5a870">toBool</a>(), ... or <a href="#661337">asInt</a>(), <a href="#4cc01a">asBool</a>(), ... methods.
<p>The following casts are done automatically:
<ul>
<li> Bool -> Double, Int, UInt
<li> Double -> Int, Bool, UInt
<li> Int -> Double, Bool, UInt
<li> UInt -> Double, Bool, Int
<li> String -> CString
<li> CString -> String
<li> List -> StringList (if the list contains strings or something
that can be cast to a string).
<li> StringList -> List
</ul>
<h3 class="fn">void<a name="4659a3"></a>QVariant::clear()</h3>
<p>Convert this variant to type Invalid and free up any resources
used.
<h3 class="fn">bool<a name="83b746"></a>QVariant::isValid()const</h3>
<p>Returns TRUE if the storage type of this variant is not QVariant::Invalid.
<h3 class="fn"><a href="qvaluelistconstiterator.html">QValueListConstIterator</a><QVariant><a name="6b77e5"></a>QVariant::listBegin()const</h3>
<p>Returns an iterator to the first item in the list, if the
variant's type is appropriate, or else a null iterator.
<h3 class="fn"><a href="qvaluelistconstiterator.html">QValueListConstIterator</a><QVariant><a name="132659"></a>QVariant::listEnd()const</h3>
<p>Returns the end iterator for the list, if the variant's type is
appropriate, or else a null iterator.
<h3 class="fn">void<a name="4fa057"></a>QVariant::load(<a href="qdatastream.html">QDataStream</a>&s)</h3>
<p>Internal function for loading a variant. Use the stream operators
instead.
<h3 class="fn"><a href="qmapconstiterator.html">QMapConstIterator</a><<a href="qstring.html">QString</a>, QVariant><a name="1d6d96"></a>QVariant::mapBegin()const</h3>
<p>Returns an iterator to the first item in the map, if the
variant's type is appropriate, or else a null iterator.
<h3 class="fn"><a href="qmapconstiterator.html">QMapConstIterator</a><<a href="qstring.html">QString</a>, QVariant><a name="8d3b3d"></a>QVariant::mapEnd()const</h3>
<p>Returns the end iterator for the map, if the variant's type is
appropriate, or else a null iterator.
<h3 class="fn"><a href="qmapconstiterator.html">QMapConstIterator</a><<a href="qstring.html">QString</a>, QVariant><a name="7b5d04"></a>QVariant::mapFind(const<a href="qstring.html">QString</a>&key)const</h3>
<p>Returns an iterator to the item in the map with <em>key</em> as key, if the
variant's type is appropriate and <em>key</em> is a valid key, or else a
null iterator.
<h3 class="fn">QVariant::Type<a name="96fb68"></a>QVariant::nameToType(constchar*name) <code>[static]</code></h3>
<p>Converts the string representation of the storage type to
its enum representation.
<p>If the string representation cannot be converted to any enum
representation, the variant is set to <code>Invalid.</code>
<h3 class="fn">bool<a name="48b974"></a>QVariant::operator!=(constQVariant&v)const</h3>
<p>Compares this QVariant with <em>v</em> and returns TRUE if they are
not equal, FALSE otherwise.
<h3 class="fn">QVariant&<a name="8aa5fa"></a>QVariant::operator=(constQVariant&variant)</h3>
<p>Assigns the value of some <em>other</em> variant to this variant.
<p>This is a deep copy of the variant, but note that if the variant
holds an explicitly shared type such as <a href="qimage.html">QImage</a>, it is a shallow copy
of the (e.g.) QImage.
<h3 class="fn">bool<a name="47f728"></a>QVariant::operator==(constQVariant&v)const</h3>
<p>Compares this QVariant with <em>v</em> and returns TRUE if they are
equal, FALSE otherwise.
<h3 class="fn">void<a name="a96bb4"></a>QVariant::save(<a href="qdatastream.html">QDataStream</a>&s)const</h3>
<p>Internal function for saving a variant. Use the stream operators
instead.
<h3 class="fn"><a href="qvaluelistconstiterator.html">QValueListConstIterator</a><<a href="qstring.html">QString</a>><a name="2a8e53"></a>QVariant::stringListBegin()const</h3>
<p>Returns an iterator to the first string in the list, if the
variant's type is StringList, or else a null iterator.
<h3 class="fn"><a href="qvaluelistconstiterator.html">QValueListConstIterator</a><<a href="qstring.html">QString</a>><a name="83e7d9"></a>QVariant::stringListEnd()const</h3>
<p>Returns the end iterator for the list, if the variant's type is
StringList, or else a null iterator.
<h3 class="fn">const<a href="qbitmap.html">QBitmap</a><a name="476835"></a>QVariant::toBitmap()const</h3>
<p>Returns the variant as a <a href="qbitmap.html">QBitmap</a> if the variant has <a href="#8196d7">type</a>()
Bitmap, or a null QBitmap otherwise.
<p>See also <a href="#6f2eab">asBitmap</a>().
<h3 class="fn">bool<a name="d5a870"></a>QVariant::toBool()const</h3>
<p>Returns the variant as a bool if the variant has <a href="#8196d7">type</a>()
Bool, or FALSE otherwise. The only exceptions to this rule are
the types Int, UInt, Double. In this case TRUE is returned if the numerical
value is not zero or FALSE otherwise.
<p>See also <a href="#4cc01a">asBool</a>().
<h3 class="fn">const<a href="qbrush.html">QBrush</a><a name="e3aebe"></a>QVariant::toBrush()const</h3>
<p>Returns the variant as a <a href="qbrush.html">QBrush</a> if the variant has <a href="#8196d7">type</a>()
Brush, or a default brush (with all black colors) otherwise.
<p>See also <a href="#322fc5">asBrush</a>().
<h3 class="fn">const<a href="qcstring.html">QCString</a><a name="084552"></a>QVariant::toCString()const</h3>
<p>Returns the variant as a <a href="qcstring.html">QCString</a> if the variant has <a href="#8196d7">type</a>()
CString, or a 0 otherwise.
<p>See also <a href="#992d98">asCString</a>().
<h3 class="fn">const<a href="qcolor.html">QColor</a><a name="f93262"></a>QVariant::toColor()const</h3>
<p>Returns the variant as a <a href="qcolor.html">QColor</a> if the variant has <a href="#8196d7">type</a>()
Color, or an invalid color otherwise.
<p>See also <a href="#d4c8c5">asColor</a>().
<h3 class="fn">const<a href="qcolorgroup.html">QColorGroup</a><a name="48889d"></a>QVariant::toColorGroup()const</h3>
<p>Returns the variant as a <a href="qcolorgroup.html">QColorGroup</a> if the variant has <a href="#8196d7">type</a>()
ColorGroup, or a completely black color group otherwise.
<p>See also <a href="#1581da">asColorGroup</a>().
<h3 class="fn">const<a href="qcursor.html">QCursor</a><a name="866704"></a>QVariant::toCursor()const</h3>
<p>Returns the variant as a <a href="qcursor.html">QCursor</a> if the variant has <a href="#8196d7">type</a>()
Cursor, or the default arrow cursor otherwise.
<p>See also <a href="#0b0158">asCursor</a>().
<h3 class="fn">double<a name="96e514"></a>QVariant::toDouble()const</h3>
<p>Returns the variant as a double if the variant has <a href="#8196d7">type</a>()
Double, Int, UInt or Bool, or 0.0 otherwise.
<p>See also <a href="#5c41ed">asDouble</a>().
<h3 class="fn">const<a href="qfont.html">QFont</a><a name="56d093"></a>QVariant::toFont()const</h3>
<p>Returns the variant as a <a href="qfont.html">QFont</a> if the variant has <a href="#8196d7">type</a>()
Font, or the default font otherwise.
<p>See also <a href="#f2d6ac">asFont</a>().
<h3 class="fn">const<a href="qiconset.html">QIconSet</a><a name="bb2dbe"></a>QVariant::toIconSet()const</h3>
<p>Returns the variant as a <a href="qiconset.html">QIconSet</a> if the variant has <a href="#8196d7">type</a>()
IconSet, or an icon set of null pixmaps otherwise.
<p>See also <a href="#8a44b8">asIconSet</a>().
<h3 class="fn">const<a href="qimage.html">QImage</a><a name="ffa107"></a>QVariant::toImage()const</h3>
<p>Returns the variant as a <a href="qimage.html">QImage</a> if the variant has <a href="#8196d7">type</a>()
Image, or a null image otherwise.
<p>See also <a href="#34b17c">asImage</a>().
<h3 class="fn">int<a name="60b9a1"></a>QVariant::toInt()const</h3>
<p>Returns the variant as an int if the variant has <a href="#8196d7">type</a>()
Int, UInt, Double or Bool, or 0 otherwise.
<p>See also <a href="#661337">asInt</a>().
<h3 class="fn">const<a href="qvaluelist.html">QValueList</a><QVariant><a name="d15e4b"></a>QVariant::toList()const</h3>
<p>Returns the variant as a <a href="qvaluelist.html">QValueList</a><QVariant> if the variant has <a href="#8196d7">type</a>()
List or StringList, or an empty list otherwise.
<p>See also <a href="#e4b39f">asList</a>().
<h3 class="fn">const<a href="qmap.html">QMap</a><<a href="qstring.html">QString</a>, QVariant><a name="adc59d"></a>QVariant::toMap()const</h3>
<p>Returns the variant as a <a href="qmap.html">QMap</a><QString,QVariant> if the variant has <a href="#8196d7">type</a>()
Map, or an empty map otherwise.
<p>See also <a href="#c0c819">asMap</a>().
<h3 class="fn">const<a href="qpalette.html">QPalette</a><a name="95c8fb"></a>QVariant::toPalette()const</h3>
<p>Returns the variant as a <a href="qpalette.html">QPalette</a> if the variant has <a href="#8196d7">type</a>()
Palette, or a completely black palette otherwise.
<p>See also <a href="#81d9be">asPalette</a>().
<h3 class="fn">const<a href="qpixmap.html">QPixmap</a><a name="462574"></a>QVariant::toPixmap()const</h3>
<p>Returns the variant as a <a href="qpixmap.html">QPixmap</a> if the variant has <a href="#8196d7">type</a>()
Pixmap, or a null pixmap otherwise.
<p>See also <a href="#07429d">asPixmap</a>().
<h3 class="fn">const<a href="qpoint.html">QPoint</a><a name="edca08"></a>QVariant::toPoint()const</h3>
<p>Returns the variant as a <a href="qpoint.html">QPoint</a> if the variant has <a href="#8196d7">type</a>()
Point, or a the point (0,0) otherwise.
<p>See also <a href="#2e4245">asPoint</a>().
<h3 class="fn">const<a href="qpointarray.html">QPointArray</a><a name="6f585a"></a>QVariant::toPointArray()const</h3>
<p>Returns the variant as a <a href="qpointarray.html">QPointArray</a> if the variant has <a href="#8196d7">type</a>()
PointArray, or an empty QPointArray otherwise.
<p>See also <a href="#95e164">asPointArray</a>().
<h3 class="fn">const<a href="qrect.html">QRect</a><a name="d01bf0"></a>QVariant::toRect()const</h3>
<p>Returns the variant as a <a href="qrect.html">QRect</a> if the variant has <a href="#8196d7">type</a>()
Rect, or an empty rectangle otherwise.
<p>See also <a href="#54717f">asRect</a>().
<h3 class="fn">const<a href="qregion.html">QRegion</a><a name="79c750"></a>QVariant::toRegion()const</h3>
<p>Returns the variant as a <a href="qregion.html">QRegion</a> if the variant has <a href="#8196d7">type</a>()
Region, or an empty QRegion otherwise.
<p>See also <a href="#8e37ae">asRegion</a>().
<h3 class="fn">const<a href="qsize.html">QSize</a><a name="b0883e"></a>QVariant::toSize()const</h3>
<p>Returns the variant as a <a href="qsize.html">QSize</a> if the variant has <a href="#8196d7">type</a>()
Size, or an invalid size otherwise.
<p>See also <a href="#53f9de">asSize</a>().
<h3 class="fn"><a href="qsizepolicy.html">QSizePolicy</a><a name="03166c"></a>QVariant::toSizePolicy()const</h3>
<p>Returns the variant as a <a href="qsizepolicy.html">QSizePolicy</a> if the variant has <a href="#8196d7">type</a>()
SizePolicy, or an undefined but legal size policy else.
<h3 class="fn">const<a href="qstring.html">QString</a><a name="5426be"></a>QVariant::toString()const</h3>
<p>Returns the variant as a <a href="qstring.html">QString</a> if the variant has <a href="#8196d7">type</a>()
String or CString, or QString::null otherwise.
<p>See also <a href="#7e2926">asString</a>().
<h3 class="fn">const<a href="qstringlist.html">QStringList</a><a name="30009b"></a>QVariant::toStringList()const</h3>
<p>Returns the variant as a <a href="qstringlist.html">QStringList</a> if the variant has <a href="#8196d7">type</a>()
StringList or List of a type that can be converted to <a href="qstring.html">QString</a>, or an
empty list otherwise.
<p>See also <a href="#5a07d2">asStringList</a>().
<h3 class="fn">uint<a name="4f471c"></a>QVariant::toUInt()const</h3>
<p>Returns the variant as an unsigned int if the variant has <a href="#8196d7">type</a>()
UInt, Int, Double or Bool, or 0 otherwise.
<p>See also <a href="#ae6a9a">asUInt</a>().
<h3 class="fn"><a href="qvariant.html#Type">Type</a><a name="8196d7"></a>QVariant::type()const</h3>
<p>Returns the storage type of the value stored in the variant. Usually
it's best to test with <a href="#4ccf65">canCast</a>() wether the variant can deliver the
data type you are interested in.
<h3 class="fn">constchar*<a name="9e1307"></a>QVariant::typeName()const</h3>
<p>Returns the name of the type stored in the variant.
The returned strings describe the C++ datatype used to store the
data, for example "<a href="qfont.html">QFont</a>", "<a href="qstring.html">QString</a>" or "<a href="qvaluelist.html">QValueList</a><QVariant>".
An Invalid variant returns 0.
<h3 class="fn">constchar*<a name="800071"></a>QVariant::typeToName(<a href="qvariant.html#Type">Type</a>typ) <code>[static]</code></h3>
<p>Converts the enum representation of the storage type to its
string representation.
<hr><p>
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