diff options
Diffstat (limited to 'doc/html/qvariant.html')
| -rw-r--r-- | doc/html/qvariant.html | 1149 |
1 files changed, 1149 insertions, 0 deletions
diff --git a/doc/html/qvariant.html b/doc/html/qvariant.html new file mode 100644 index 00000000..517bf76b --- /dev/null +++ b/doc/html/qvariant.html @@ -0,0 +1,1149 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qvariant.cpp:353 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>TQVariant Class</title> +<style type="text/css"><!-- +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>TQVariant Class Reference</h1> + +<p>The TQVariant class acts like a union for the most common TQt data types. +<a href="#details">More...</a> +<p><tt>#include <<a href="qvariant-h.html">qvariant.h</a>></tt> +<p><a href="qvariant-members.html">List of all member functions.</a> +<h2>Public Members</h2> +<ul> +<li class=fn>enum <a href="#Type-enum"><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, Date, Time, DateTime, ByteArray, BitArray, KeySequence, Pen, LongLong, ULongLong }</li> +<li class=fn><a href="#TQVariant"><b>TQVariant</b></a> ()</li> +<li class=fn><a href="#~TQVariant"><b>~TQVariant</b></a> ()</li> +<li class=fn><a href="#TQVariant-2"><b>TQVariant</b></a> ( const TQVariant & p )</li> +<li class=fn><a href="#TQVariant-3"><b>TQVariant</b></a> ( TQDataStream & s )</li> +<li class=fn><a href="#TQVariant-4"><b>TQVariant</b></a> ( const TQString & val )</li> +<li class=fn><a href="#TQVariant-5"><b>TQVariant</b></a> ( const TQCString & val )</li> +<li class=fn><a href="#TQVariant-6"><b>TQVariant</b></a> ( const char * val )</li> +<li class=fn><a href="#TQVariant-7"><b>TQVariant</b></a> ( const TQStringList & val )</li> +<li class=fn><a href="#TQVariant-8"><b>TQVariant</b></a> ( const TQFont & val )</li> +<li class=fn><a href="#TQVariant-9"><b>TQVariant</b></a> ( const TQPixmap & val )</li> +<li class=fn><a href="#TQVariant-a"><b>TQVariant</b></a> ( const TQImage & val )</li> +<li class=fn><a href="#TQVariant-b"><b>TQVariant</b></a> ( const TQBrush & val )</li> +<li class=fn><a href="#TQVariant-c"><b>TQVariant</b></a> ( const TQPoint & val )</li> +<li class=fn><a href="#TQVariant-d"><b>TQVariant</b></a> ( const TQRect & val )</li> +<li class=fn><a href="#TQVariant-e"><b>TQVariant</b></a> ( const TQSize & val )</li> +<li class=fn><a href="#TQVariant-f"><b>TQVariant</b></a> ( const TQColor & val )</li> +<li class=fn><a href="#TQVariant-g"><b>TQVariant</b></a> ( const TQPalette & val )</li> +<li class=fn><a href="#TQVariant-h"><b>TQVariant</b></a> ( const TQColorGroup & val )</li> +<li class=fn><a href="#TQVariant-i"><b>TQVariant</b></a> ( const TQIconSet & val )</li> +<li class=fn><a href="#TQVariant-j"><b>TQVariant</b></a> ( const TQPointArray & val )</li> +<li class=fn><a href="#TQVariant-k"><b>TQVariant</b></a> ( const TQRegion & val )</li> +<li class=fn><a href="#TQVariant-l"><b>TQVariant</b></a> ( const TQBitmap & val )</li> +<li class=fn><a href="#TQVariant-m"><b>TQVariant</b></a> ( const TQCursor & val )</li> +<li class=fn><a href="#TQVariant-n"><b>TQVariant</b></a> ( const TQDate & val )</li> +<li class=fn><a href="#TQVariant-o"><b>TQVariant</b></a> ( const TQTime & val )</li> +<li class=fn><a href="#TQVariant-p"><b>TQVariant</b></a> ( const TQDateTime & val )</li> +<li class=fn><a href="#TQVariant-q"><b>TQVariant</b></a> ( const TQByteArray & val )</li> +<li class=fn><a href="#TQVariant-r"><b>TQVariant</b></a> ( const TQBitArray & val )</li> +<li class=fn><a href="#TQVariant-s"><b>TQVariant</b></a> ( const TQKeySequence & val )</li> +<li class=fn><a href="#TQVariant-t"><b>TQVariant</b></a> ( const TQPen & val )</li> +<li class=fn><a href="#TQVariant-u"><b>TQVariant</b></a> ( const TQValueList<TQVariant> & val )</li> +<li class=fn><a href="#TQVariant-v"><b>TQVariant</b></a> ( const TQMap<TQString, TQVariant> & val )</li> +<li class=fn><a href="#TQVariant-w"><b>TQVariant</b></a> ( int val )</li> +<li class=fn><a href="#TQVariant-x"><b>TQVariant</b></a> ( uint val )</li> +<li class=fn><a href="#TQVariant-y"><b>TQVariant</b></a> ( Q_LLONG val )</li> +<li class=fn><a href="#TQVariant-z"><b>TQVariant</b></a> ( Q_ULLONG val )</li> +<li class=fn><a href="#TQVariant-10"><b>TQVariant</b></a> ( bool val, int )</li> +<li class=fn><a href="#TQVariant-11"><b>TQVariant</b></a> ( double val )</li> +<li class=fn><a href="#TQVariant-12"><b>TQVariant</b></a> ( TQSizePolicy val )</li> +<li class=fn>TQVariant & <a href="#operator-eq"><b>operator=</b></a> ( const TQVariant & variant )</li> +<li class=fn>bool <a href="#operator-eq-eq"><b>operator==</b></a> ( const TQVariant & v ) const</li> +<li class=fn>bool <a href="#operator!-eq"><b>operator!=</b></a> ( const TQVariant & v ) const</li> +<li class=fn>Type <a href="#type"><b>type</b></a> () const</li> +<li class=fn>const char * <a href="#typeName"><b>typeName</b></a> () const</li> +<li class=fn>bool <a href="#canCast"><b>canCast</b></a> ( Type t ) const</li> +<li class=fn>bool <a href="#cast"><b>cast</b></a> ( Type t )</li> +<li class=fn>bool <a href="#isValid"><b>isValid</b></a> () const</li> +<li class=fn>bool <a href="#isNull"><b>isNull</b></a> () const</li> +<li class=fn>void <a href="#clear"><b>clear</b></a> ()</li> +<li class=fn>const TQString <a href="#toString"><b>toString</b></a> () const</li> +<li class=fn>const TQCString <a href="#toCString"><b>toCString</b></a> () const</li> +<li class=fn>const TQStringList <a href="#toStringList"><b>toStringList</b></a> () const</li> +<li class=fn>const TQFont <a href="#toFont"><b>toFont</b></a> () const</li> +<li class=fn>const TQPixmap <a href="#toPixmap"><b>toPixmap</b></a> () const</li> +<li class=fn>const TQImage <a href="#toImage"><b>toImage</b></a> () const</li> +<li class=fn>const TQBrush <a href="#toBrush"><b>toBrush</b></a> () const</li> +<li class=fn>const TQPoint <a href="#toPoint"><b>toPoint</b></a> () const</li> +<li class=fn>const TQRect <a href="#toRect"><b>toRect</b></a> () const</li> +<li class=fn>const TQSize <a href="#toSize"><b>toSize</b></a> () const</li> +<li class=fn>const TQColor <a href="#toColor"><b>toColor</b></a> () const</li> +<li class=fn>const TQPalette <a href="#toPalette"><b>toPalette</b></a> () const</li> +<li class=fn>const TQColorGroup <a href="#toColorGroup"><b>toColorGroup</b></a> () const</li> +<li class=fn>const TQIconSet <a href="#toIconSet"><b>toIconSet</b></a> () const</li> +<li class=fn>const TQPointArray <a href="#toPointArray"><b>toPointArray</b></a> () const</li> +<li class=fn>const TQBitmap <a href="#toBitmap"><b>toBitmap</b></a> () const</li> +<li class=fn>const TQRegion <a href="#toRegion"><b>toRegion</b></a> () const</li> +<li class=fn>const TQCursor <a href="#toCursor"><b>toCursor</b></a> () const</li> +<li class=fn>const TQDate <a href="#toDate"><b>toDate</b></a> () const</li> +<li class=fn>const TQTime <a href="#toTime"><b>toTime</b></a> () const</li> +<li class=fn>const TQDateTime <a href="#toDateTime"><b>toDateTime</b></a> () const</li> +<li class=fn>const TQByteArray <a href="#toByteArray"><b>toByteArray</b></a> () const</li> +<li class=fn>const TQBitArray <a href="#toBitArray"><b>toBitArray</b></a> () const</li> +<li class=fn>const TQKeySequence <a href="#toKeySequence"><b>toKeySequence</b></a> () const</li> +<li class=fn>const TQPen <a href="#toPen"><b>toPen</b></a> () const</li> +<li class=fn>int <a href="#toInt"><b>toInt</b></a> ( bool * ok = 0 ) const</li> +<li class=fn>uint <a href="#toUInt"><b>toUInt</b></a> ( bool * ok = 0 ) const</li> +<li class=fn>Q_LLONG <a href="#toLongLong"><b>toLongLong</b></a> ( bool * ok = 0 ) const</li> +<li class=fn>Q_ULLONG <a href="#toULongLong"><b>toULongLong</b></a> ( bool * ok = 0 ) const</li> +<li class=fn>bool <a href="#toBool"><b>toBool</b></a> () const</li> +<li class=fn>double <a href="#toDouble"><b>toDouble</b></a> ( bool * ok = 0 ) const</li> +<li class=fn>const TQValueList<TQVariant> <a href="#toList"><b>toList</b></a> () const</li> +<li class=fn>const TQMap<TQString, TQVariant> <a href="#toMap"><b>toMap</b></a> () const</li> +<li class=fn>TQSizePolicy <a href="#toSizePolicy"><b>toSizePolicy</b></a> () const</li> +<li class=fn>TQValueListConstIterator<TQString> stringListBegin () const <em>(obsolete)</em></li> +<li class=fn>TQValueListConstIterator<TQString> stringListEnd () const <em>(obsolete)</em></li> +<li class=fn>TQValueListConstIterator<TQVariant> listBegin () const <em>(obsolete)</em></li> +<li class=fn>TQValueListConstIterator<TQVariant> listEnd () const <em>(obsolete)</em></li> +<li class=fn>TQMapConstIterator<TQString, TQVariant> mapBegin () const <em>(obsolete)</em></li> +<li class=fn>TQMapConstIterator<TQString, TQVariant> mapEnd () const <em>(obsolete)</em></li> +<li class=fn>TQMapConstIterator<TQString, TQVariant> mapFind ( const TQString & key ) const <em>(obsolete)</em></li> +<li class=fn>TQString & <a href="#asString"><b>asString</b></a> ()</li> +<li class=fn>TQCString & <a href="#asCString"><b>asCString</b></a> ()</li> +<li class=fn>TQStringList & <a href="#asStringList"><b>asStringList</b></a> ()</li> +<li class=fn>TQFont & <a href="#asFont"><b>asFont</b></a> ()</li> +<li class=fn>TQPixmap & <a href="#asPixmap"><b>asPixmap</b></a> ()</li> +<li class=fn>TQImage & <a href="#asImage"><b>asImage</b></a> ()</li> +<li class=fn>TQBrush & <a href="#asBrush"><b>asBrush</b></a> ()</li> +<li class=fn>TQPoint & <a href="#asPoint"><b>asPoint</b></a> ()</li> +<li class=fn>TQRect & <a href="#asRect"><b>asRect</b></a> ()</li> +<li class=fn>TQSize & <a href="#asSize"><b>asSize</b></a> ()</li> +<li class=fn>TQColor & <a href="#asColor"><b>asColor</b></a> ()</li> +<li class=fn>TQPalette & <a href="#asPalette"><b>asPalette</b></a> ()</li> +<li class=fn>TQColorGroup & <a href="#asColorGroup"><b>asColorGroup</b></a> ()</li> +<li class=fn>TQIconSet & <a href="#asIconSet"><b>asIconSet</b></a> ()</li> +<li class=fn>TQPointArray & <a href="#asPointArray"><b>asPointArray</b></a> ()</li> +<li class=fn>TQBitmap & <a href="#asBitmap"><b>asBitmap</b></a> ()</li> +<li class=fn>TQRegion & <a href="#asRegion"><b>asRegion</b></a> ()</li> +<li class=fn>TQCursor & <a href="#asCursor"><b>asCursor</b></a> ()</li> +<li class=fn>TQDate & <a href="#asDate"><b>asDate</b></a> ()</li> +<li class=fn>TQTime & <a href="#asTime"><b>asTime</b></a> ()</li> +<li class=fn>TQDateTime & <a href="#asDateTime"><b>asDateTime</b></a> ()</li> +<li class=fn>TQByteArray & <a href="#asByteArray"><b>asByteArray</b></a> ()</li> +<li class=fn>TQBitArray & <a href="#asBitArray"><b>asBitArray</b></a> ()</li> +<li class=fn>TQKeySequence & <a href="#asKeySequence"><b>asKeySequence</b></a> ()</li> +<li class=fn>TQPen & <a href="#asPen"><b>asPen</b></a> ()</li> +<li class=fn>int & <a href="#asInt"><b>asInt</b></a> ()</li> +<li class=fn>uint & <a href="#asUInt"><b>asUInt</b></a> ()</li> +<li class=fn>Q_LLONG & <a href="#asLongLong"><b>asLongLong</b></a> ()</li> +<li class=fn>Q_ULLONG & <a href="#asULongLong"><b>asULongLong</b></a> ()</li> +<li class=fn>bool & <a href="#asBool"><b>asBool</b></a> ()</li> +<li class=fn>double & <a href="#asDouble"><b>asDouble</b></a> ()</li> +<li class=fn>TQValueList<TQVariant> & <a href="#asList"><b>asList</b></a> ()</li> +<li class=fn>TQMap<TQString, TQVariant> & <a href="#asMap"><b>asMap</b></a> ()</li> +<li class=fn>TQSizePolicy & <a href="#asSizePolicy"><b>asSizePolicy</b></a> ()</li> +</ul> +<h2>Static Public Members</h2> +<ul> +<li class=fn>const char * <a href="#typeToName"><b>typeToName</b></a> ( Type typ )</li> +<li class=fn>Type <a href="#nameToType"><b>nameToType</b></a> ( const char * name )</li> +</ul> +<hr><a name="details"></a><h2>Detailed Description</h2> + + +The TQVariant class acts like a union for the most common TQt data types. +<p> + + +<p> Because C++ forbids unions from including types that have +non-default constructors or destructors, most interesting TQt +classes cannot be used in unions. Without TQVariant, this would be +a problem for <a href="qobject.html#property">TQObject::property</a>() and for database work, etc. +<p> A TQVariant object holds a single value of a single <a href="#type">type</a>() at a +time. (Some type()s are multi-valued, for example a string list.) +You can find out what type, T, the variant holds, convert it to a +different type using one of the asT() functions, e.g. <a href="#asSize">asSize</a>(), +get its value using one of the toT() functions, e.g. <a href="#toSize">toSize</a>(), and +check whether the type can be converted to a particular type using +<a href="#canCast">canCast</a>(). +<p> The methods named toT() (for any supported T, see the <a href="#Type-enum">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 that 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 TQVariant are <a href="shclass.html#explicitly-shared">explicitly shared</a>, namely <a href="qimage.html">TQImage</a>, <a href="qpointarray.html">TQPointArray</a>, and <a href="qcstring.html">TQCString</a>, and in these +cases the toT() methods return a <a href="shclass.html#shallow-copy">shallow copy</a>. In almost all cases +you must make a <a href="shclass.html#deep-copy">deep copy</a> of the returned values before modifying +them. +<p> The asT() functions are not const. They do conversion like the +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 the use of TQVariant: +<p> <pre> + <a href="qdatastream.html">TQDataStream</a> out(...); + TQVariant v(123); // The variant now contains an int + int x = v.<a href="#toInt">toInt</a>(); // x = 123 + out << v; // Writes a type tag and an int to out + v = <a href="#TQVariant">TQVariant</a>("hello"); // The variant now contains a TQCString + v = <a href="#TQVariant">TQVariant</a>(tr("hello"));// The variant now contains a TQString + int y = v.<a href="#toInt">toInt</a>(); // y = 0 since v cannot be converted to an int + <a href="qstring.html">TQString</a> s = v.<a href="#toString">toString</a>(); // s = tr("hello") (see TQObject::tr()) + out << v; // Writes a type tag and a TQString to out + ... + <a href="qdatastream.html">TQDataStream</a> in(...); // (opening the previously written stream) + in >> v; // Reads an Int variant + int z = v.<a href="#toInt">toInt</a>(); // z = 123 + <a href="qapplication.html#qDebug">qDebug</a>("Type is %s", // prints "Type is int" + v.<a href="#typeName">typeName</a>()); + v.<a href="#asInt">asInt</a>() += 100; // The variant now hold the value 223. + v = <a href="#TQVariant">TQVariant</a>( TQStringList() ); + v.<a href="#asStringList">asStringList</a>().append( "Hello" ); + </pre> + +<p> You can even store <a href="qvaluelist.html">TQValueList</a><TQVariant>s and +<a href="qmap.html">TQMap</a><TQString,TQVariant>s in a variant, so you can easily construct +arbitrarily complex data structures of arbitrary types. This is +very powerful and versatile, but may prove less memory and speed +efficient than storing specific types in standard data structures. +<p> TQVariant also supports the notion of NULL values, where you have a +defined type with no value set. +<pre> + TQVariant x, y( TQString() ), z( TQString("") ); + x.<a href="#asInt">asInt</a>(); + // x.<a href="#isNull">isNull</a>() == TRUE, y.isNull() == TRUE, z.isNull() == FALSE + </pre> + +<p> See the <a href="collection.html">Collection Classes</a>. +<p>See also <a href="misc.html">Miscellaneous Classes</a> and <a href="objectmodel.html">Object Model</a>. + +<hr><h2>Member Type Documentation</h2> +<h3 class=fn><a name="Type-enum"></a>TQVariant::Type</h3> + +<p> This enum type defines the types of variable that a TQVariant can +contain. +<ul> +<li><tt>TQVariant::Invalid</tt> - no type +<li><tt>TQVariant::BitArray</tt> - a <a href="qbitarray.html">TQBitArray</a> +<li><tt>TQVariant::ByteArray</tt> - a <a href="qbytearray.html">TQByteArray</a> +<li><tt>TQVariant::Bitmap</tt> - a <a href="qbitmap.html">TQBitmap</a> +<li><tt>TQVariant::Bool</tt> - a bool +<li><tt>TQVariant::Brush</tt> - a <a href="qbrush.html">TQBrush</a> +<li><tt>TQVariant::Color</tt> - a <a href="qcolor.html">TQColor</a> +<li><tt>TQVariant::ColorGroup</tt> - a <a href="qcolorgroup.html">TQColorGroup</a> +<li><tt>TQVariant::Cursor</tt> - a <a href="qcursor.html">TQCursor</a> +<li><tt>TQVariant::Date</tt> - a <a href="qdate.html">TQDate</a> +<li><tt>TQVariant::DateTime</tt> - a <a href="qdatetime.html">TQDateTime</a> +<li><tt>TQVariant::Double</tt> - a double +<li><tt>TQVariant::Font</tt> - a <a href="qfont.html">TQFont</a> +<li><tt>TQVariant::IconSet</tt> - a <a href="qiconset.html">TQIconSet</a> +<li><tt>TQVariant::Image</tt> - a <a href="qimage.html">TQImage</a> +<li><tt>TQVariant::Int</tt> - an int +<li><tt>TQVariant::KeySequence</tt> - a <a href="qkeysequence.html">TQKeySequence</a> +<li><tt>TQVariant::List</tt> - a <a href="qvaluelist.html">TQValueList</a><TQVariant> +<li><tt>TQVariant::LongLong</tt> - a long long +<li><tt>TQVariant::ULongLong</tt> - an unsigned long long +<li><tt>TQVariant::Map</tt> - a <a href="qmap.html">TQMap</a><TQString,TQVariant> +<li><tt>TQVariant::Palette</tt> - a <a href="qpalette.html">TQPalette</a> +<li><tt>TQVariant::Pen</tt> - a <a href="qpen.html">TQPen</a> +<li><tt>TQVariant::Pixmap</tt> - a <a href="qpixmap.html">TQPixmap</a> +<li><tt>TQVariant::Point</tt> - a <a href="qpoint.html">TQPoint</a> +<li><tt>TQVariant::PointArray</tt> - a <a href="qpointarray.html">TQPointArray</a> +<li><tt>TQVariant::Rect</tt> - a <a href="qrect.html">TQRect</a> +<li><tt>TQVariant::Region</tt> - a <a href="qregion.html">TQRegion</a> +<li><tt>TQVariant::Size</tt> - a <a href="qsize.html">TQSize</a> +<li><tt>TQVariant::SizePolicy</tt> - a <a href="qsizepolicy.html">TQSizePolicy</a> +<li><tt>TQVariant::String</tt> - a <a href="qstring.html">TQString</a> +<li><tt>TQVariant::CString</tt> - a <a href="qcstring.html">TQCString</a> +<li><tt>TQVariant::StringList</tt> - a <a href="qstringlist.html">TQStringList</a> +<li><tt>TQVariant::Time</tt> - a <a href="qtime.html">TQTime</a> +<li><tt>TQVariant::UInt</tt> - an unsigned int +</ul><p> Note that TQt'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="TQVariant"></a>TQVariant::TQVariant () +</h3> +Constructs an invalid variant. + +<h3 class=fn><a name="TQVariant-10"></a>TQVariant::TQVariant ( bool val, int ) +</h3> +Constructs a new variant with a boolean value, <em>val</em>. The integer +argument is a dummy, necessary for compatibility with some +compilers. + +<h3 class=fn><a name="TQVariant-11"></a>TQVariant::TQVariant ( double val ) +</h3> +Constructs a new variant with a floating point value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-12"></a>TQVariant::TQVariant ( <a href="qsizepolicy.html">TQSizePolicy</a> val ) +</h3> +Constructs a new variant with a size policy value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-2"></a>TQVariant::TQVariant ( const <a href="qvariant.html">TQVariant</a> & p ) +</h3> +Constructs a copy of the variant, <em>p</em>, passed as the argument to +this constructor. Usually this is a <a href="shclass.html#deep-copy">deep copy</a>, but a <a href="shclass.html#shallow-copy">shallow copy</a> +is made if the stored data type is <a href="shclass.html#explicitly-shared">explicitly shared</a>, as e.g. +<a href="qimage.html">TQImage</a> is. + +<h3 class=fn><a name="TQVariant-3"></a>TQVariant::TQVariant ( <a href="qdatastream.html">TQDataStream</a> & s ) +</h3> +Reads the variant from the data stream, <em>s</em>. + +<h3 class=fn><a name="TQVariant-4"></a>TQVariant::TQVariant ( const <a href="qstring.html">TQString</a> & val ) +</h3> +Constructs a new variant with a string value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-5"></a>TQVariant::TQVariant ( const <a href="qcstring.html">TQCString</a> & val ) +</h3> +Constructs a new variant with a C-string value, <em>val</em>. +<p> If you want to modify the <a href="qcstring.html">TQCString</a> after you've passed it to this +constructor, we recommend passing a <a href="shclass.html#deep-copy">deep copy</a> (see +<a href="qcstring.html#copy">TQCString::copy</a>()). + +<h3 class=fn><a name="TQVariant-6"></a>TQVariant::TQVariant ( const char * val ) +</h3> +Constructs a new variant with a C-string value of <em>val</em> if <em>val</em> +is non-null. The variant creates a <a href="shclass.html#deep-copy">deep copy</a> of <em>val</em>. +<p> If <em>val</em> is null, the resulting variant has type Invalid. + +<h3 class=fn><a name="TQVariant-7"></a>TQVariant::TQVariant ( const <a href="qstringlist.html">TQStringList</a> & val ) +</h3> +Constructs a new variant with a string list value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-8"></a>TQVariant::TQVariant ( const <a href="qfont.html">TQFont</a> & val ) +</h3> +Constructs a new variant with a font value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-9"></a>TQVariant::TQVariant ( const <a href="qpixmap.html">TQPixmap</a> & val ) +</h3> +Constructs a new variant with a pixmap value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-a"></a>TQVariant::TQVariant ( const <a href="qimage.html">TQImage</a> & val ) +</h3> +Constructs a new variant with an image value, <em>val</em>. +<p> Because <a href="qimage.html">TQImage</a> is <a href="shclass.html#explicitly-shared">explicitly shared</a>, you may need to pass a <a href="shclass.html#deep-copy">deep copy</a> to the variant using <a href="qimage.html#copy">TQImage::copy</a>(), e.g. if you intend +changing the image you've passed later on. + +<h3 class=fn><a name="TQVariant-b"></a>TQVariant::TQVariant ( const <a href="qbrush.html">TQBrush</a> & val ) +</h3> +Constructs a new variant with a brush value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-c"></a>TQVariant::TQVariant ( const <a href="qpoint.html">TQPoint</a> & val ) +</h3> +Constructs a new variant with a point value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-d"></a>TQVariant::TQVariant ( const <a href="qrect.html">TQRect</a> & val ) +</h3> +Constructs a new variant with a rect value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-e"></a>TQVariant::TQVariant ( const <a href="qsize.html">TQSize</a> & val ) +</h3> +Constructs a new variant with a size value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-f"></a>TQVariant::TQVariant ( const <a href="qcolor.html">TQColor</a> & val ) +</h3> +Constructs a new variant with a color value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-g"></a>TQVariant::TQVariant ( const <a href="qpalette.html">TQPalette</a> & val ) +</h3> +Constructs a new variant with a color palette value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-h"></a>TQVariant::TQVariant ( const <a href="qcolorgroup.html">TQColorGroup</a> & val ) +</h3> +Constructs a new variant with a color group value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-i"></a>TQVariant::TQVariant ( const <a href="qiconset.html">TQIconSet</a> & val ) +</h3> +Constructs a new variant with an icon set value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-j"></a>TQVariant::TQVariant ( const <a href="qpointarray.html">TQPointArray</a> & val ) +</h3> +Constructs a new variant with a point array value, <em>val</em>. +<p> Because <a href="qpointarray.html">TQPointArray</a> is <a href="shclass.html#explicitly-shared">explicitly shared</a>, you may need to pass a +<a href="shclass.html#deep-copy">deep copy</a> to the variant using <a href="qpointarray.html#copy">TQPointArray::copy</a>(), e.g. if you +intend changing the point array you've passed later on. + +<h3 class=fn><a name="TQVariant-k"></a>TQVariant::TQVariant ( const <a href="qregion.html">TQRegion</a> & val ) +</h3> +Constructs a new variant with a region value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-l"></a>TQVariant::TQVariant ( const <a href="qbitmap.html">TQBitmap</a> & val ) +</h3> +Constructs a new variant with a bitmap value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-m"></a>TQVariant::TQVariant ( const <a href="qcursor.html">TQCursor</a> & val ) +</h3> +Constructs a new variant with a cursor value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-n"></a>TQVariant::TQVariant ( const <a href="qdate.html">TQDate</a> & val ) +</h3> +Constructs a new variant with a date value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-o"></a>TQVariant::TQVariant ( const <a href="qtime.html">TQTime</a> & val ) +</h3> +Constructs a new variant with a time value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-p"></a>TQVariant::TQVariant ( const <a href="qdatetime.html">TQDateTime</a> & val ) +</h3> +Constructs a new variant with a date/time value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-q"></a>TQVariant::TQVariant ( const <a href="qbytearray.html">TQByteArray</a> & val ) +</h3> +Constructs a new variant with a bytearray value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-r"></a>TQVariant::TQVariant ( const <a href="qbitarray.html">TQBitArray</a> & val ) +</h3> +Constructs a new variant with a bitarray value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-s"></a>TQVariant::TQVariant ( const <a href="qkeysequence.html">TQKeySequence</a> & val ) +</h3> +Constructs a new variant with a key sequence value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-t"></a>TQVariant::TQVariant ( const <a href="qpen.html">TQPen</a> & val ) +</h3> +Constructs a new variant with a pen value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-u"></a>TQVariant::TQVariant ( const <a href="qvaluelist.html">TQValueList</a><TQVariant> & val ) +</h3> +Constructs a new variant with a list value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-v"></a>TQVariant::TQVariant ( const <a href="qmap.html">TQMap</a><TQString, TQVariant> & val ) +</h3> +Constructs a new variant with a map of TQVariants, <em>val</em>. + +<h3 class=fn><a name="TQVariant-w"></a>TQVariant::TQVariant ( int val ) +</h3> +Constructs a new variant with an integer value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-x"></a>TQVariant::TQVariant ( uint val ) +</h3> +Constructs a new variant with an unsigned integer value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-y"></a>TQVariant::TQVariant ( Q_LLONG val ) +</h3> +Constructs a new variant with a long long integer value, <em>val</em>. + +<h3 class=fn><a name="TQVariant-z"></a>TQVariant::TQVariant ( Q_ULLONG val ) +</h3> +Constructs a new variant with an unsigned long long integer value, <em>val</em>. + +<h3 class=fn><a name="~TQVariant"></a>TQVariant::~TQVariant () +</h3> +Destroys the TQVariant and the contained object. +<p> Note that subclasses that reimplement <a href="#clear">clear</a>() should reimplement +the destructor to call clear(). This destructor calls clear(), but +because it is the destructor, <a href="#clear">TQVariant::clear</a>() is called rather +than a subclass's clear(). + +<h3 class=fn><a href="qbitarray.html">TQBitArray</a> & <a name="asBitArray"></a>TQVariant::asBitArray () +</h3> + +<p> Tries to convert the variant to hold a <a href="qbitarray.html">TQBitArray</a> value. If that is +not possible then the variant is set to an empty bitarray. +<p> Returns a reference to the stored bitarray. +<p> <p>See also <a href="#toBitArray">toBitArray</a>(). + +<h3 class=fn><a href="qbitmap.html">TQBitmap</a> & <a name="asBitmap"></a>TQVariant::asBitmap () +</h3> + +<p> Tries to convert the variant to hold a bitmap value. If that is +not possible the variant is set to a null bitmap. +<p> Returns a reference to the stored bitmap. +<p> <p>See also <a href="#toBitmap">toBitmap</a>(). + +<h3 class=fn>bool & <a name="asBool"></a>TQVariant::asBool () +</h3> +Returns the variant's value as bool reference. + +<h3 class=fn><a href="qbrush.html">TQBrush</a> & <a name="asBrush"></a>TQVariant::asBrush () +</h3> + +<p> Tries to convert the variant to hold a brush value. If that is not +possible the variant is set to a default black brush. +<p> Returns a reference to the stored brush. +<p> <p>See also <a href="#toBrush">toBrush</a>(). + +<h3 class=fn><a href="qbytearray.html">TQByteArray</a> & <a name="asByteArray"></a>TQVariant::asByteArray () +</h3> + +<p> Tries to convert the variant to hold a <a href="qbytearray.html">TQByteArray</a> value. If that +is not possible then the variant is set to an empty bytearray. +<p> Returns a reference to the stored bytearray. +<p> <p>See also <a href="#toByteArray">toByteArray</a>(). + +<h3 class=fn><a href="qcstring.html">TQCString</a> & <a name="asCString"></a>TQVariant::asCString () +</h3> + +<p> Tries to convert the variant to hold a string value. If that is +not possible the variant is set to an empty string. +<p> Returns a reference to the stored string. +<p> <p>See also <a href="#toCString">toCString</a>(). + +<h3 class=fn><a href="qcolor.html">TQColor</a> & <a name="asColor"></a>TQVariant::asColor () +</h3> + +<p> Tries to convert the variant to hold a <a href="qcolor.html">TQColor</a> value. If that is +not possible the variant is set to an invalid color. +<p> Returns a reference to the stored color. +<p> <p>See also <a href="#toColor">toColor</a>() and <a href="qcolor.html#isValid">TQColor::isValid</a>(). + +<h3 class=fn><a href="qcolorgroup.html">TQColorGroup</a> & <a name="asColorGroup"></a>TQVariant::asColorGroup () +</h3> + +<p> Tries to convert the variant to hold a <a href="qcolorgroup.html">TQColorGroup</a> value. If that +is not possible the variant is set to a color group of all black +colors. +<p> Returns a reference to the stored color group. +<p> <p>See also <a href="#toColorGroup">toColorGroup</a>(). + +<h3 class=fn><a href="qcursor.html">TQCursor</a> & <a name="asCursor"></a>TQVariant::asCursor () +</h3> + +<p> Tries to convert the variant to hold a <a href="qcursor.html">TQCursor</a> value. If that is +not possible the variant is set to a default arrow cursor. +<p> Returns a reference to the stored cursor. +<p> <p>See also <a href="#toCursor">toCursor</a>(). + +<h3 class=fn><a href="qdate.html">TQDate</a> & <a name="asDate"></a>TQVariant::asDate () +</h3> + +<p> Tries to convert the variant to hold a <a href="qdate.html">TQDate</a> value. If that is not +possible then the variant is set to an invalid date. +<p> Returns a reference to the stored date. +<p> <p>See also <a href="#toDate">toDate</a>(). + +<h3 class=fn><a href="qdatetime.html">TQDateTime</a> & <a name="asDateTime"></a>TQVariant::asDateTime () +</h3> + +<p> Tries to convert the variant to hold a <a href="qdatetime.html">TQDateTime</a> value. If that is +not possible then the variant is set to an invalid date/time. +<p> Returns a reference to the stored date/time. +<p> <p>See also <a href="#toDateTime">toDateTime</a>(). + +<h3 class=fn>double & <a name="asDouble"></a>TQVariant::asDouble () +</h3> +Returns the variant's value as double reference. + +<h3 class=fn><a href="qfont.html">TQFont</a> & <a name="asFont"></a>TQVariant::asFont () +</h3> + +<p> Tries to convert the variant to hold a <a href="qfont.html">TQFont</a>. If that is not +possible the variant is set to the application's default font. +<p> Returns a reference to the stored font. +<p> <p>See also <a href="#toFont">toFont</a>(). + +<h3 class=fn><a href="qiconset.html">TQIconSet</a> & <a name="asIconSet"></a>TQVariant::asIconSet () +</h3> + +<p> Tries to convert the variant to hold a <a href="qiconset.html">TQIconSet</a> value. If that is +not possible the variant is set to an empty iconset. +<p> Returns a reference to the stored iconset. +<p> <p>See also <a href="#toIconSet">toIconSet</a>(). + +<h3 class=fn><a href="qimage.html">TQImage</a> & <a name="asImage"></a>TQVariant::asImage () +</h3> + +<p> Tries to convert the variant to hold an image value. If that is +not possible the variant is set to a null image. +<p> Returns a reference to the stored image. +<p> <p>See also <a href="#toImage">toImage</a>(). + +<h3 class=fn>int & <a name="asInt"></a>TQVariant::asInt () +</h3> +Returns the variant's value as int reference. + +<h3 class=fn><a href="qkeysequence.html">TQKeySequence</a> & <a name="asKeySequence"></a>TQVariant::asKeySequence () +</h3> + +<p> Tries to convert the variant to hold a <a href="qkeysequence.html">TQKeySequence</a> value. If that +is not possible then the variant is set to an empty key sequence. +<p> Returns a reference to the stored key sequence. +<p> <p>See also <a href="#toKeySequence">toKeySequence</a>(). + +<h3 class=fn><a href="qvaluelist.html">TQValueList</a><TQVariant> & <a name="asList"></a>TQVariant::asList () +</h3> +Returns the variant's value as variant list reference. +<p> Note that if you want to iterate over the list, you should iterate +over a copy, e.g. +<pre> + <a href="qvaluelist.html">TQValueList</a><TQVariant> list = myVariant.asList(); + TQValueList<TQVariant>::Iterator it = list.<a href="qvaluelist.html#begin">begin</a>(); + while( it != list.<a href="qvaluelist.html#end">end</a>() ) { + myProcessing( *it ); + ++it; + } + </pre> + + +<h3 class=fn>Q_LLONG & <a name="asLongLong"></a>TQVariant::asLongLong () +</h3> +Returns the variant's value as long long reference. + +<h3 class=fn><a href="qmap.html">TQMap</a><TQString, TQVariant> & <a name="asMap"></a>TQVariant::asMap () +</h3> +Returns the variant's value as variant map reference. +<p> Note that if you want to iterate over the map, you should iterate +over a copy, e.g. +<pre> + <a href="qmap.html">TQMap</a><TQString, TQVariant> map = myVariant.asMap(); + TQMap<TQString, TQVariant>::Iterator it = map.<a href="qmap.html#begin">begin</a>(); + while( it != map.<a href="qmap.html#end">end</a>() ) { + myProcessing( *it ); + ++it; + } + </pre> + + +<h3 class=fn><a href="qpalette.html">TQPalette</a> & <a name="asPalette"></a>TQVariant::asPalette () +</h3> + +<p> Tries to convert the variant to hold a <a href="qpalette.html">TQPalette</a> value. If that is +not possible the variant is set to a palette of black colors. +<p> Returns a reference to the stored palette. +<p> <p>See also <a href="#toString">toString</a>(). + +<h3 class=fn><a href="qpen.html">TQPen</a> & <a name="asPen"></a>TQVariant::asPen () +</h3> +<p> Tries to convert the variant to hold a <a href="qpen.html">TQPen</a> value. If that +is not possible then the variant is set to an empty pen. +<p> Returns a reference to the stored pen. +<p> <p>See also <a href="#toPen">toPen</a>(). + +<h3 class=fn><a href="qpixmap.html">TQPixmap</a> & <a name="asPixmap"></a>TQVariant::asPixmap () +</h3> + +<p> Tries to convert the variant to hold a pixmap value. If that is +not possible the variant is set to a null pixmap. +<p> Returns a reference to the stored pixmap. +<p> <p>See also <a href="#toPixmap">toPixmap</a>(). + +<h3 class=fn><a href="qpoint.html">TQPoint</a> & <a name="asPoint"></a>TQVariant::asPoint () +</h3> + +<p> Tries to convert the variant to hold a point value. If that is not +possible the variant is set to a (0, 0) point. +<p> Returns a reference to the stored point. +<p> <p>See also <a href="#toPoint">toPoint</a>(). + +<h3 class=fn><a href="qpointarray.html">TQPointArray</a> & <a name="asPointArray"></a>TQVariant::asPointArray () +</h3> + +<p> Tries to convert the variant to hold a <a href="qpointarray.html">TQPointArray</a> value. If that +is not possible the variant is set to an empty point array. +<p> Returns a reference to the stored point array. +<p> <p>See also <a href="#toPointArray">toPointArray</a>(). + +<h3 class=fn><a href="qrect.html">TQRect</a> & <a name="asRect"></a>TQVariant::asRect () +</h3> + +<p> Tries to convert the variant to hold a rectangle value. If that is +not possible the variant is set to an empty rectangle. +<p> Returns a reference to the stored rectangle. +<p> <p>See also <a href="#toRect">toRect</a>(). + +<h3 class=fn><a href="qregion.html">TQRegion</a> & <a name="asRegion"></a>TQVariant::asRegion () +</h3> + +<p> Tries to convert the variant to hold a <a href="qregion.html">TQRegion</a> value. If that is +not possible the variant is set to a null region. +<p> Returns a reference to the stored region. +<p> <p>See also <a href="#toRegion">toRegion</a>(). + +<h3 class=fn><a href="qsize.html">TQSize</a> & <a name="asSize"></a>TQVariant::asSize () +</h3> + +<p> Tries to convert the variant to hold a <a href="qsize.html">TQSize</a> value. If that is not +possible the variant is set to an invalid size. +<p> Returns a reference to the stored size. +<p> <p>See also <a href="#toSize">toSize</a>() and <a href="qsize.html#isValid">TQSize::isValid</a>(). + +<h3 class=fn><a href="qsizepolicy.html">TQSizePolicy</a> & <a name="asSizePolicy"></a>TQVariant::asSizePolicy () +</h3> + +<p> Tries to convert the variant to hold a <a href="qsizepolicy.html">TQSizePolicy</a> value. If that +fails, the variant is set to an arbitrary (valid) size policy. + +<h3 class=fn><a href="qstring.html">TQString</a> & <a name="asString"></a>TQVariant::asString () +</h3> + +<p> Tries to convert the variant to hold a string value. If that is +not possible the variant is set to an empty string. +<p> Returns a reference to the stored string. +<p> <p>See also <a href="#toString">toString</a>(). + +<h3 class=fn><a href="qstringlist.html">TQStringList</a> & <a name="asStringList"></a>TQVariant::asStringList () +</h3> + +<p> Tries to convert the variant to hold a <a href="qstringlist.html">TQStringList</a> value. If that +is not possible the variant is set to an empty string list. +<p> Returns a reference to the stored string list. +<p> Note that if you want to iterate over the list, you should +iterate over a copy, e.g. +<pre> + <a href="qstringlist.html">TQStringList</a> list = myVariant.asStringList(); + TQStringList::Iterator it = list.<a href="qvaluelist.html#begin">begin</a>(); + while( it != list.<a href="qvaluelist.html#end">end</a>() ) { + myProcessing( *it ); + ++it; + } + </pre> + +<p> <p>See also <a href="#toStringList">toStringList</a>(). + +<h3 class=fn><a href="qtime.html">TQTime</a> & <a name="asTime"></a>TQVariant::asTime () +</h3> + +<p> Tries to convert the variant to hold a <a href="qtime.html">TQTime</a> value. If that is not +possible then the variant is set to an invalid time. +<p> Returns a reference to the stored time. +<p> <p>See also <a href="#toTime">toTime</a>(). + +<h3 class=fn>uint & <a name="asUInt"></a>TQVariant::asUInt () +</h3> +Returns the variant's value as unsigned int reference. + +<h3 class=fn>Q_ULLONG & <a name="asULongLong"></a>TQVariant::asULongLong () +</h3> +Returns the variant's value as unsigned long long reference. + +<h3 class=fn>bool <a name="canCast"></a>TQVariant::canCast ( <a href="qvariant.html#Type-enum">Type</a> t ) const +</h3> +Returns TRUE if the variant's type can be cast to the requested +type, <em>t</em>. Such casting is done automatically when calling the +<a href="#toInt">toInt</a>(), <a href="#toBool">toBool</a>(), ... or <a href="#asInt">asInt</a>(), <a href="#asBool">asBool</a>(), ... methods. +<p> The following casts are done automatically: +<center><table cellpadding="4" cellspacing="2" border="0"> +<tr bgcolor="#a2c511"> <th valign="top">Type <th valign="top">Automatically Cast To +<tr bgcolor="#f0f0f0"> <td valign="top">Bool <td valign="top">Double, Int, UInt, LongLong, ULongLong, String, CString, ByteArray +<tr bgcolor="#d0d0d0"> <td valign="top">Color <td valign="top">String. CString. ByteArray +<tr bgcolor="#f0f0f0"> <td valign="top">Date <td valign="top">String, CString, ByteArray, DateTime +<tr bgcolor="#d0d0d0"> <td valign="top">DateTime <td valign="top">String, CString, ByteArray, Date, Time +<tr bgcolor="#f0f0f0"> <td valign="top">Double <td valign="top">String, CString, ByteArray, Int, Bool, UInt, LongLong, ULongLong +<tr bgcolor="#d0d0d0"> <td valign="top">Font <td valign="top">String, CString, ByteArray +<tr bgcolor="#f0f0f0"> <td valign="top">Int <td valign="top">String, CString, ByteArray, Double, Bool, UInt, LongLong, ULongLong, KeySequence +<tr bgcolor="#d0d0d0"> <td valign="top">LongLong <td valign="top">String, CString, ByteArray, Double, Bool, UInt, LongLong, ULongLong, KeySequence +<tr bgcolor="#f0f0f0"> <td valign="top">ULongLong <td valign="top">String, CString, ByteArray, Double, Bool, UInt, LongLong, ULongLong, KeySequence +<tr bgcolor="#d0d0d0"> <td valign="top">List <td valign="top">StringList (if the list contains only strings or +something that can be cast to a string) +<tr bgcolor="#f0f0f0"> <td valign="top">String <td valign="top">CString, ByteArray, CString, Int, UInt, Bool, Double, Date, +Time, DateTime, KeySequence, Font, Color +<tr bgcolor="#d0d0d0"> <td valign="top">CString <td valign="top">String, ByteArray, Int, UInt, Bool, Double, Date, ULongLong, LongLong +<tr bgcolor="#f0f0f0"> <td valign="top">ByteArray <td valign="top">String, CString, Int, UInt, Bool, Double, Date, ULongLong, LongLong +<tr bgcolor="#d0d0d0"> <td valign="top">StringList <td valign="top">List +<tr bgcolor="#f0f0f0"> <td valign="top">Time <td valign="top">String +<tr bgcolor="#d0d0d0"> <td valign="top">Int <td valign="top">String, CString, ByteArray, Double, Bool, UInt, LongLong, ULongLong, KeySequence +<tr bgcolor="#f0f0f0"> <td valign="top">KeySequence <td valign="top">String, CString, ByteArray, Int, UInt, LongLong, ULongLong +</table></center> + +<h3 class=fn>bool <a name="cast"></a>TQVariant::cast ( <a href="qvariant.html#Type-enum">Type</a> t ) +</h3> +Casts the variant to the requested type. If the cast cannot be +done, the variant is set to the default value of the requested +type (e.g. an empty string if the requested type <em>t</em> is +TQVariant::String, an empty point array if the requested type <em>t</em> +is TQVariant::PointArray, etc). Returns TRUE if the current type of +the variant was successfully cast; otherwise returns FALSE. +<p> <p>See also <a href="#canCast">canCast</a>(). + +<h3 class=fn>void <a name="clear"></a>TQVariant::clear () +</h3> +Convert this variant to type Invalid and free up any resources +used. + +<h3 class=fn>bool <a name="isNull"></a>TQVariant::isNull () const +</h3> +Returns TRUE if this is a NULL variant, FALSE otherwise. + +<h3 class=fn>bool <a name="isValid"></a>TQVariant::isValid () const +</h3> + +<p> Returns TRUE if the storage type of this variant is not +TQVariant::Invalid; otherwise returns FALSE. + +<h3 class=fn><a href="qvaluelistconstiterator.html">TQValueListConstIterator</a><TQVariant> <a name="listBegin"></a>TQVariant::listBegin () const +</h3> + +<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code. +<p> Returns an iterator to the first item in the list if the variant's +type is appropriate; otherwise returns a null iterator. + +<h3 class=fn><a href="qvaluelistconstiterator.html">TQValueListConstIterator</a><TQVariant> <a name="listEnd"></a>TQVariant::listEnd () const +</h3> + +<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code. +<p> Returns the end iterator for the list if the variant's type is +appropriate; otherwise returns a null iterator. + +<h3 class=fn><a href="qmapconstiterator.html">TQMapConstIterator</a><TQString, TQVariant> <a name="mapBegin"></a>TQVariant::mapBegin () const +</h3> + +<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code. +<p> Returns an iterator to the first item in the map, if the variant's +type is appropriate; otherwise returns a null iterator. + +<h3 class=fn><a href="qmapconstiterator.html">TQMapConstIterator</a><TQString, TQVariant> <a name="mapEnd"></a>TQVariant::mapEnd () const +</h3> + +<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code. +<p> Returns the end iterator for the map, if the variant's type is +appropriate; otherwise returns a null iterator. + +<h3 class=fn><a href="qmapconstiterator.html">TQMapConstIterator</a><TQString, TQVariant> <a name="mapFind"></a>TQVariant::mapFind ( const <a href="qstring.html">TQString</a> & key ) const +</h3> + +<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code. +<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; +otherwise returns a null iterator. + +<h3 class=fn><a href="qvariant.html#Type-enum">Type</a> <a name="nameToType"></a>TQVariant::nameToType ( const char * name )<tt> [static]</tt> +</h3> +Converts the string representation of the storage type given in <em>name</em>, to its enum representation. +<p> If the string representation cannot be converted to any enum +representation, the variant is set to <a href="#Type-enum">Invalid</a>. + +<h3 class=fn>bool <a name="operator!-eq"></a>TQVariant::operator!= ( const <a href="qvariant.html">TQVariant</a> & v ) const +</h3> +Compares this TQVariant with <em>v</em> and returns TRUE if they are not +equal; otherwise returns FALSE. + +<h3 class=fn><a href="qvariant.html">TQVariant</a> & <a name="operator-eq"></a>TQVariant::operator= ( const <a href="qvariant.html">TQVariant</a> & variant ) +</h3> +Assigns the value of the variant <em>variant</em> to this variant. +<p> This is a <a href="shclass.html#deep-copy">deep copy</a> of the variant, but note that if the variant +holds an <a href="shclass.html#explicitly-shared">explicitly shared</a> type such as <a href="qimage.html">TQImage</a>, a <a href="shclass.html#shallow-copy">shallow copy</a> is +performed. + +<h3 class=fn>bool <a name="operator-eq-eq"></a>TQVariant::operator== ( const <a href="qvariant.html">TQVariant</a> & v ) const +</h3> +Compares this TQVariant with <em>v</em> and returns TRUE if they are +equal; otherwise returns FALSE. + +<h3 class=fn><a href="qvaluelistconstiterator.html">TQValueListConstIterator</a><TQString> <a name="stringListBegin"></a>TQVariant::stringListBegin () const +</h3> + +<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code. +<p> Returns an iterator to the first string in the list if the +variant's type is StringList; otherwise returns a null iterator. + +<h3 class=fn><a href="qvaluelistconstiterator.html">TQValueListConstIterator</a><TQString> <a name="stringListEnd"></a>TQVariant::stringListEnd () const +</h3> + +<b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code. +<p> Returns the end iterator for the list if the variant's type is +StringList; otherwise returns a null iterator. + +<h3 class=fn>const <a href="qbitarray.html">TQBitArray</a> <a name="toBitArray"></a>TQVariant::toBitArray () const +</h3> +Returns the variant as a <a href="qbitarray.html">TQBitArray</a> if the variant has <a href="#type">type</a>() +BitArray; otherwise returns an empty bitarray. +<p> <p>See also <a href="#asBitArray">asBitArray</a>(). + +<h3 class=fn>const <a href="qbitmap.html">TQBitmap</a> <a name="toBitmap"></a>TQVariant::toBitmap () const +</h3> +Returns the variant as a <a href="qbitmap.html">TQBitmap</a> if the variant has <a href="#type">type</a>() Bitmap; +otherwise returns a null TQBitmap. +<p> <p>See also <a href="#asBitmap">asBitmap</a>(). + +<h3 class=fn>bool <a name="toBool"></a>TQVariant::toBool () const +</h3> +Returns the variant as a bool if the variant can be cast to Bool; +otherWise returns FALSE. +<p> Returns TRUE if the variant has a numeric type and its value is +non-zero, or if the variant has type String, ByteArray or CString +and its lower-case content is not empty, "0" or "false"; otherwise +returns FALSE. +<p> <p>See also <a href="#asBool">asBool</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn>const <a href="qbrush.html">TQBrush</a> <a name="toBrush"></a>TQVariant::toBrush () const +</h3> +Returns the variant as a <a href="qbrush.html">TQBrush</a> if the variant has <a href="#type">type</a>() Brush; +otherwise returns a default brush (with all black colors). +<p> <p>See also <a href="#asBrush">asBrush</a>(). + +<h3 class=fn>const <a href="qbytearray.html">TQByteArray</a> <a name="toByteArray"></a>TQVariant::toByteArray () const +</h3> +Returns the variant as a <a href="qbytearray.html">TQByteArray</a> if the variant can be cast to +a ByteArray; otherwise returns an empty bytearray. +<p> <p>See also <a href="#asByteArray">asByteArray</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn>const <a href="qcstring.html">TQCString</a> <a name="toCString"></a>TQVariant::toCString () const +</h3> +Returns the variant as a <a href="qcstring.html">TQCString</a> if the variant can be cast to a +CString; otherwise returns 0. +<p> <p>See also <a href="#asCString">asCString</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn>const <a href="qcolor.html">TQColor</a> <a name="toColor"></a>TQVariant::toColor () const +</h3> +Returns the variant as a <a href="qcolor.html">TQColor</a> if the variant can be cast to Color; +otherwise returns an invalid color. +<p> <p>See also <a href="#asColor">asColor</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn>const <a href="qcolorgroup.html">TQColorGroup</a> <a name="toColorGroup"></a>TQVariant::toColorGroup () const +</h3> +Returns the variant as a <a href="qcolorgroup.html">TQColorGroup</a> if the variant has <a href="#type">type</a>() +ColorGroup; otherwise returns a completely black color group. +<p> <p>See also <a href="#asColorGroup">asColorGroup</a>(). + +<h3 class=fn>const <a href="qcursor.html">TQCursor</a> <a name="toCursor"></a>TQVariant::toCursor () const +</h3> +Returns the variant as a <a href="qcursor.html">TQCursor</a> if the variant has <a href="#type">type</a>() Cursor; +otherwise returns the default arrow cursor. +<p> <p>See also <a href="#asCursor">asCursor</a>(). + +<h3 class=fn>const <a href="qdate.html">TQDate</a> <a name="toDate"></a>TQVariant::toDate () const +</h3> +Returns the variant as a <a href="qdate.html">TQDate</a> if the variant can be cast to Date; +otherwise returns an invalid date. +<p> Note that if the <a href="#type">type</a>() is String, CString or ByteArray an invalid +date will be returned if the string cannot be parsed as a +TQt::ISODate format date. +<p> <p>See also <a href="#asDate">asDate</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn>const <a href="qdatetime.html">TQDateTime</a> <a name="toDateTime"></a>TQVariant::toDateTime () const +</h3> +Returns the variant as a <a href="qdatetime.html">TQDateTime</a> if the variant can be cast to +DateTime; otherwise returns an invalid TQDateTime. +<p> Note that if the <a href="#type">type</a>() is String, CString or ByteArray an invalid +TQDateTime will be returned if the string cannot be parsed as a +TQt::ISODate format date/time. +<p> <p>See also <a href="#asDateTime">asDateTime</a>(). + +<h3 class=fn>double <a name="toDouble"></a>TQVariant::toDouble ( bool * ok = 0 ) const +</h3> +Returns the variant as a double if the variant can be cast to +Double; otherwise returns 0.0. +<p> If <em>ok</em> is non-null: <em>*ok</em> is set to TRUE if the value could be +converted to a double; otherwise <em>*ok</em> is set to FALSE. +<p> <p>See also <a href="#asDouble">asDouble</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn>const <a href="qfont.html">TQFont</a> <a name="toFont"></a>TQVariant::toFont () const +</h3> +Returns the variant as a <a href="qfont.html">TQFont</a> if the variant can be cast to Font; +otherwise returns the application's default font. +<p> <p>See also <a href="#asFont">asFont</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn>const <a href="qiconset.html">TQIconSet</a> <a name="toIconSet"></a>TQVariant::toIconSet () const +</h3> +Returns the variant as a <a href="qiconset.html">TQIconSet</a> if the variant has <a href="#type">type</a>() +IconSet; otherwise returns an icon set of null pixmaps. +<p> <p>See also <a href="#asIconSet">asIconSet</a>(). + +<h3 class=fn>const <a href="qimage.html">TQImage</a> <a name="toImage"></a>TQVariant::toImage () const +</h3> +Returns the variant as a <a href="qimage.html">TQImage</a> if the variant has <a href="#type">type</a>() Image; +otherwise returns a null image. +<p> <p>See also <a href="#asImage">asImage</a>(). + +<h3 class=fn>int <a name="toInt"></a>TQVariant::toInt ( bool * ok = 0 ) const +</h3> +Returns the variant as an int if the variant can be cast to Int; +otherwise returns 0. +<p> If <em>ok</em> is non-null: <em>*ok</em> is set to TRUE if the value could be +converted to an int; otherwise <em>*ok</em> is set to FALSE. +<p> <p>See also <a href="#asInt">asInt</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn>const <a href="qkeysequence.html">TQKeySequence</a> <a name="toKeySequence"></a>TQVariant::toKeySequence () const +</h3> +Returns the variant as a <a href="qkeysequence.html">TQKeySequence</a> if the variant can be cast +to a KeySequence; otherwise returns an empty key sequence. +<p> <p>See also <a href="#asKeySequence">asKeySequence</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn>const <a href="qvaluelist.html">TQValueList</a><TQVariant> <a name="toList"></a>TQVariant::toList () const +</h3> +Returns the variant as a <a href="qvaluelist.html">TQValueList</a><TQVariant> if the variant has +<a href="#type">type</a>() List or StringList; otherwise returns an empty list. +<p> Note that if you want to iterate over the list, you should iterate +over a copy, e.g. +<pre> + <a href="qvaluelist.html">TQValueList</a><TQVariant> list = myVariant.toList(); + TQValueList<TQVariant>::Iterator it = list.<a href="qvaluelist.html#begin">begin</a>(); + while( it != list.<a href="qvaluelist.html#end">end</a>() ) { + myProcessing( *it ); + ++it; + } + </pre> + +<p> <p>See also <a href="#asList">asList</a>(). + +<h3 class=fn>Q_LLONG <a name="toLongLong"></a>TQVariant::toLongLong ( bool * ok = 0 ) const +</h3> +Returns the variant as a long long int if the variant can be cast +to LongLong; otherwise returns 0. +<p> If <em>ok</em> is non-null: <em>*ok</em> is set to TRUE if the value could be +converted to an int; otherwise <em>*ok</em> is set to FALSE. +<p> <p>See also <a href="#asLongLong">asLongLong</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn>const <a href="qmap.html">TQMap</a><TQString, TQVariant> <a name="toMap"></a>TQVariant::toMap () const +</h3> +Returns the variant as a <a href="qmap.html">TQMap</a><TQString,TQVariant> if the variant has +<a href="#type">type</a>() Map; otherwise returns an empty map. +<p> Note that if you want to iterate over the map, you should iterate +over a copy, e.g. +<pre> + <a href="qmap.html">TQMap</a><TQString, TQVariant> map = myVariant.toMap(); + TQMap<TQString, TQVariant>::Iterator it = map.<a href="qmap.html#begin">begin</a>(); + while( it != map.<a href="qmap.html#end">end</a>() ) { + myProcessing( *it ); + ++it; + } + </pre> + +<p> <p>See also <a href="#asMap">asMap</a>(). + +<h3 class=fn>const <a href="qpalette.html">TQPalette</a> <a name="toPalette"></a>TQVariant::toPalette () const +</h3> +Returns the variant as a <a href="qpalette.html">TQPalette</a> if the variant has <a href="#type">type</a>() +Palette; otherwise returns a completely black palette. +<p> <p>See also <a href="#asPalette">asPalette</a>(). + +<h3 class=fn>const <a href="qpen.html">TQPen</a> <a name="toPen"></a>TQVariant::toPen () const +</h3> +Returns the variant as a <a href="qpen.html">TQPen</a> if the variant has <a href="#type">type</a>() +Pen; otherwise returns an empty TQPen. +<p> <p>See also <a href="#asPen">asPen</a>(). + +<h3 class=fn>const <a href="qpixmap.html">TQPixmap</a> <a name="toPixmap"></a>TQVariant::toPixmap () const +</h3> +Returns the variant as a <a href="qpixmap.html">TQPixmap</a> if the variant has <a href="#type">type</a>() Pixmap; +otherwise returns a null pixmap. +<p> <p>See also <a href="#asPixmap">asPixmap</a>(). + +<h3 class=fn>const <a href="qpoint.html">TQPoint</a> <a name="toPoint"></a>TQVariant::toPoint () const +</h3> +Returns the variant as a <a href="qpoint.html">TQPoint</a> if the variant has <a href="#type">type</a>() Point; +otherwise returns a point (0, 0). +<p> <p>See also <a href="#asPoint">asPoint</a>(). + +<h3 class=fn>const <a href="qpointarray.html">TQPointArray</a> <a name="toPointArray"></a>TQVariant::toPointArray () const +</h3> +Returns the variant as a <a href="qpointarray.html">TQPointArray</a> if the variant has <a href="#type">type</a>() +PointArray; otherwise returns an empty TQPointArray. +<p> <p>See also <a href="#asPointArray">asPointArray</a>(). + +<h3 class=fn>const <a href="qrect.html">TQRect</a> <a name="toRect"></a>TQVariant::toRect () const +</h3> +Returns the variant as a <a href="qrect.html">TQRect</a> if the variant has <a href="#type">type</a>() Rect; +otherwise returns an empty rectangle. +<p> <p>See also <a href="#asRect">asRect</a>(). + +<h3 class=fn>const <a href="qregion.html">TQRegion</a> <a name="toRegion"></a>TQVariant::toRegion () const +</h3> +Returns the variant as a <a href="qregion.html">TQRegion</a> if the variant has <a href="#type">type</a>() Region; +otherwise returns an empty TQRegion. +<p> <p>See also <a href="#asRegion">asRegion</a>(). + +<h3 class=fn>const <a href="qsize.html">TQSize</a> <a name="toSize"></a>TQVariant::toSize () const +</h3> +Returns the variant as a <a href="qsize.html">TQSize</a> if the variant has <a href="#type">type</a>() Size; +otherwise returns an invalid size. +<p> <p>See also <a href="#asSize">asSize</a>(). + +<h3 class=fn><a href="qsizepolicy.html">TQSizePolicy</a> <a name="toSizePolicy"></a>TQVariant::toSizePolicy () const +</h3> +Returns the variant as a <a href="qsizepolicy.html">TQSizePolicy</a> if the variant has <a href="#type">type</a>() +SizePolicy; otherwise returns an undefined (but legal) size +policy. + +<h3 class=fn>const <a href="qstring.html">TQString</a> <a name="toString"></a>TQVariant::toString () const +</h3> +Returns the variant as a <a href="qstring.html">TQString</a> if the variant can be cast to +String, otherwise returns <a href="qstring.html#TQString-null">TQString::null</a>. +<p> <p>See also <a href="#asString">asString</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn>const <a href="qstringlist.html">TQStringList</a> <a name="toStringList"></a>TQVariant::toStringList () const +</h3> +Returns the variant as a <a href="qstringlist.html">TQStringList</a> if the variant has <a href="#type">type</a>() +StringList or List of a type that can be converted to <a href="qstring.html">TQString</a>; +otherwise returns an empty list. +<p> Note that if you want to iterate over the list, you should iterate +over a copy, e.g. +<pre> + <a href="qstringlist.html">TQStringList</a> list = myVariant.toStringList(); + TQStringList::Iterator it = list.<a href="qvaluelist.html#begin">begin</a>(); + while( it != list.<a href="qvaluelist.html#end">end</a>() ) { + myProcessing( *it ); + ++it; + } + </pre> + +<p> <p>See also <a href="#asStringList">asStringList</a>(). + +<h3 class=fn>const <a href="qtime.html">TQTime</a> <a name="toTime"></a>TQVariant::toTime () const +</h3> +Returns the variant as a <a href="qtime.html">TQTime</a> if the variant can be cast to Time; +otherwise returns an invalid date. +<p> Note that if the <a href="#type">type</a>() is String, CString or ByteArray an invalid +time will be returned if the string cannot be parsed as a +TQt::ISODate format time. +<p> <p>See also <a href="#asTime">asTime</a>(). + +<h3 class=fn>uint <a name="toUInt"></a>TQVariant::toUInt ( bool * ok = 0 ) const +</h3> +Returns the variant as an unsigned int if the variant can be cast +to UInt; otherwise returns 0. +<p> If <em>ok</em> is non-null: <em>*ok</em> is set to TRUE if the value could be +converted to an unsigned int; otherwise <em>*ok</em> is set to FALSE. +<p> <p>See also <a href="#asUInt">asUInt</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn>Q_ULLONG <a name="toULongLong"></a>TQVariant::toULongLong ( bool * ok = 0 ) const +</h3> +Returns the variant as as an unsigned long long int if the variant +can be cast to ULongLong; otherwise returns 0. +<p> If <em>ok</em> is non-null: <em>*ok</em> is set to TRUE if the value could be +converted to an int; otherwise <em>*ok</em> is set to FALSE. +<p> <p>See also <a href="#asULongLong">asULongLong</a>() and <a href="#canCast">canCast</a>(). + +<h3 class=fn><a href="qvariant.html#Type-enum">Type</a> <a name="type"></a>TQVariant::type () const +</h3> + +<p> Returns the storage type of the value stored in the variant. +Usually it's best to test with <a href="#canCast">canCast</a>() whether the variant can +deliver the data type you are interested in. + +<h3 class=fn>const char * <a name="typeName"></a>TQVariant::typeName () const +</h3> +Returns the name of the type stored in the variant. The returned +strings describe the C++ datatype used to store the data: for +example, "TQFont", "TQString", or "TQValueList<TQVariant>". An Invalid +variant returns 0. + +<h3 class=fn>const char * <a name="typeToName"></a>TQVariant::typeToName ( <a href="qvariant.html#Type-enum">Type</a> typ )<tt> [static]</tt> +</h3> +Converts the enum representation of the storage type, <em>typ</em>, to +its string representation. + +<!-- eof --> +<hr><p> +This file is part of the <a href="index.html">TQt toolkit</a>. +Copyright © 1995-2007 +<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 © 2007 +<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> +<td align=right><div align=right>TQt 3.3.8</div> +</table></div></address></body> +</html> |