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authorTimothy Pearson <[email protected]>2011-11-08 12:31:36 -0600
committerTimothy Pearson <[email protected]>2011-11-08 12:31:36 -0600
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tree6e3dcca4f77e20ec8966c666aac7c35bd4704053 /doc/html/qregion.html
downloadtqt3-d796c9dd933ab96ec83b9a634feedd5d32e1ba3f.tar.gz
tqt3-d796c9dd933ab96ec83b9a634feedd5d32e1ba3f.zip
Test conversion to TQt3 from Qt3 8c6fc1f8e35fd264dd01c582ca5e7549b32ab731
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+<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qregion.cpp:44 -->
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+<title>TQRegion Class</title>
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+ <a href="index.html">
+<font color="#004faf">Home</font></a>
+ | <a href="classes.html">
+<font color="#004faf">All&nbsp;Classes</font></a>
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+<font color="#004faf">Grouped&nbsp;Classes</font></a>
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+<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>TQRegion Class Reference</h1>
+
+<p>The TQRegion class specifies a clip region for a painter.
+<a href="#details">More...</a>
+<p><tt>#include &lt;<a href="qregion-h.html">qregion.h</a>&gt;</tt>
+<p><a href="qregion-members.html">List of all member functions.</a>
+<h2>Public Members</h2>
+<ul>
+<li class=fn>enum <a href="#RegionType-enum"><b>RegionType</b></a> { Rectangle, Ellipse }</li>
+<li class=fn><a href="#TQRegion"><b>TQRegion</b></a> ()</li>
+<li class=fn><a href="#TQRegion-2"><b>TQRegion</b></a> ( int&nbsp;x, int&nbsp;y, int&nbsp;w, int&nbsp;h, RegionType&nbsp;t = Rectangle )</li>
+<li class=fn><a href="#TQRegion-3"><b>TQRegion</b></a> ( const&nbsp;TQRect&nbsp;&amp;&nbsp;r, RegionType&nbsp;t = Rectangle )</li>
+<li class=fn><a href="#TQRegion-4"><b>TQRegion</b></a> ( const&nbsp;TQPointArray&nbsp;&amp;&nbsp;a, bool&nbsp;winding = FALSE )</li>
+<li class=fn><a href="#TQRegion-5"><b>TQRegion</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r )</li>
+<li class=fn><a href="#TQRegion-6"><b>TQRegion</b></a> ( const&nbsp;TQBitmap&nbsp;&amp;&nbsp;bm )</li>
+<li class=fn><a href="#~TQRegion"><b>~TQRegion</b></a> ()</li>
+<li class=fn>TQRegion &amp; <a href="#operator-eq"><b>operator=</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r )</li>
+<li class=fn>bool <a href="#isNull"><b>isNull</b></a> () const</li>
+<li class=fn>bool <a href="#isEmpty"><b>isEmpty</b></a> () const</li>
+<li class=fn>bool <a href="#contains"><b>contains</b></a> ( const&nbsp;TQPoint&nbsp;&amp;&nbsp;p ) const</li>
+<li class=fn>bool <a href="#contains-2"><b>contains</b></a> ( const&nbsp;TQRect&nbsp;&amp;&nbsp;r ) const</li>
+<li class=fn>void <a href="#translate"><b>translate</b></a> ( int&nbsp;dx, int&nbsp;dy )</li>
+<li class=fn>TQRegion <a href="#unite"><b>unite</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r ) const</li>
+<li class=fn>TQRegion <a href="#intersect"><b>intersect</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r ) const</li>
+<li class=fn>TQRegion <a href="#subtract"><b>subtract</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r ) const</li>
+<li class=fn>TQRegion <a href="#eor"><b>eor</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r ) const</li>
+<li class=fn>TQRect <a href="#boundingRect"><b>boundingRect</b></a> () const</li>
+<li class=fn>TQMemArray&lt;TQRect&gt; <a href="#rects"><b>rects</b></a> () const</li>
+<li class=fn>const TQRegion <a href="#operator|"><b>operator|</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r ) const</li>
+<li class=fn>const TQRegion <a href="#operator+"><b>operator+</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r ) const</li>
+<li class=fn>const TQRegion <a href="#operator-and"><b>operator&amp;</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r ) const</li>
+<li class=fn>const TQRegion <a href="#operator-"><b>operator-</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r ) const</li>
+<li class=fn>const TQRegion <a href="#operator^"><b>operator^</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r ) const</li>
+<li class=fn>TQRegion &amp; <a href="#operator|-eq"><b>operator|=</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r )</li>
+<li class=fn>TQRegion &amp; <a href="#operator+-eq"><b>operator+=</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r )</li>
+<li class=fn>TQRegion &amp; <a href="#operator-and-eq"><b>operator&amp;=</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r )</li>
+<li class=fn>TQRegion &amp; <a href="#operator--eq"><b>operator-=</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r )</li>
+<li class=fn>TQRegion &amp; <a href="#operator^-eq"><b>operator^=</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r )</li>
+<li class=fn>bool <a href="#operator-eq-eq"><b>operator==</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r ) const</li>
+<li class=fn>bool <a href="#operator!-eq"><b>operator!=</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r ) const</li>
+<li class=fn>HRGN <a href="#handle"><b>handle</b></a> () const</li>
+</ul>
+<h2>Related Functions</h2>
+<ul>
+<li class=fn>TQDataStream &amp; <a href="#operator-lt-lt"><b>operator&lt;&lt;</b></a> ( TQDataStream&nbsp;&amp;&nbsp;s, const&nbsp;TQRegion&nbsp;&amp;&nbsp;r )</li>
+<li class=fn>TQDataStream &amp; <a href="#operator-gt-gt"><b>operator&gt;&gt;</b></a> ( TQDataStream&nbsp;&amp;&nbsp;s, TQRegion&nbsp;&amp;&nbsp;r )</li>
+</ul>
+<hr><a name="details"></a><h2>Detailed Description</h2>
+
+
+The TQRegion class specifies a clip region for a painter.
+<p>
+
+<p> TQRegion is used with <a href="qpainter.html#setClipRegion">TQPainter::setClipRegion</a>() to limit the paint
+area to what needs to be painted. There is also a
+<a href="qwidget.html#repaint">TQWidget::repaint</a>() that takes a TQRegion parameter. TQRegion is the
+best tool for reducing flicker.
+<p> A region can be created from a rectangle, an ellipse, a polygon or
+a bitmap. Complex regions may be created by combining simple
+regions using <a href="#unite">unite</a>(), <a href="#intersect">intersect</a>(), <a href="#subtract">subtract</a>() or <a href="#eor">eor</a>() (exclusive
+or). You can move a region using <a href="#translate">translate</a>().
+<p> You can test whether a region <a href="#isNull">isNull</a>(), <a href="#isEmpty">isEmpty</a>() or if it
+<a href="#contains">contains</a>() a <a href="qpoint.html">TQPoint</a> or <a href="qrect.html">TQRect</a>. The bounding rectangle is given by
+<a href="#boundingRect">boundingRect</a>().
+<p> The function <a href="#rects">rects</a>() gives a decomposition of the region into
+rectangles.
+<p> Example of using complex regions:
+<pre>
+ void MyWidget::paintEvent( <a href="qpaintevent.html">TQPaintEvent</a> * )
+ {
+ <a href="qpainter.html">TQPainter</a> p; // our painter
+ TQRegion r1( TQRect(100,100,200,80), // r1 = elliptic region
+ TQRegion::<a href="#RegionType-enum">Ellipse</a> );
+ TQRegion r2( TQRect(100,120,90,30) ); // r2 = rectangular region
+ TQRegion r3 = r1.<a href="#intersect">intersect</a>( r2 ); // r3 = intersection
+ p.<a href="qpainter.html#begin">begin</a>( this ); // start painting widget
+ p.<a href="qpainter.html#setClipRegion">setClipRegion</a>( r3 ); // set clip region
+ ... // paint clipped graphics
+ p.<a href="qpainter.html#end">end</a>(); // painting done
+ }
+ </pre>
+
+<p> TQRegion is an <a href="shclass.html">implicitly shared</a> class.
+<p> <b>Warning:</b> Due to window system limitations, the whole coordinate
+space for a region is limited to the points between -32767 and
+32767 on Mac OS X and Windows 95/98/ME.
+<p> <p>See also <a href="qpainter.html#setClipRegion">TQPainter::setClipRegion</a>(), <a href="qpainter.html#setClipRect">TQPainter::setClipRect</a>(), <a href="graphics.html">Graphics Classes</a>, and <a href="images.html">Image Processing Classes</a>.
+
+<hr><h2>Member Type Documentation</h2>
+<h3 class=fn><a name="RegionType-enum"></a>TQRegion::RegionType</h3>
+
+<p> Specifies the shape of the region to be created.
+<ul>
+<li><tt>TQRegion::Rectangle</tt> - the region covers the entire rectangle.
+<li><tt>TQRegion::Ellipse</tt> - the region is an ellipse inside the rectangle.
+</ul>
+<hr><h2>Member Function Documentation</h2>
+<h3 class=fn><a name="TQRegion"></a>TQRegion::TQRegion ()
+</h3>
+Constructs a null region.
+<p> <p>See also <a href="#isNull">isNull</a>().
+
+<h3 class=fn><a name="TQRegion-2"></a>TQRegion::TQRegion ( int&nbsp;x, int&nbsp;y, int&nbsp;w, int&nbsp;h, <a href="qregion.html#RegionType-enum">RegionType</a>&nbsp;t = Rectangle )
+</h3>
+Constructs a rectangular or elliptic region.
+<p> If <em>t</em> is <a href="#RegionType-enum">Rectangle</a>, the region is the filled rectangle (<em>x</em>,
+<em>y</em>, <em>w</em>, <em>h</em>). If <em>t</em> is <a href="#RegionType-enum">Ellipse</a>, the region is the filled
+ellipse with center at (<em>x</em> + <em>w</em> / 2, <em>y</em> + <em>h</em> / 2) and size
+(<em>w</em> ,<em>h</em> ).
+
+<h3 class=fn><a name="TQRegion-3"></a>TQRegion::TQRegion ( const&nbsp;<a href="qrect.html">TQRect</a>&nbsp;&amp;&nbsp;r, <a href="qregion.html#RegionType-enum">RegionType</a>&nbsp;t = Rectangle )
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Create a region based on the rectange <em>r</em> with region type <em>t</em>.
+<p> If the rectangle is invalid a null region will be created.
+<p> <p>See also <a href="#RegionType-enum">TQRegion::RegionType</a>.
+
+<h3 class=fn><a name="TQRegion-4"></a>TQRegion::TQRegion ( const&nbsp;<a href="qpointarray.html">TQPointArray</a>&nbsp;&amp;&nbsp;a, bool&nbsp;winding = FALSE )
+</h3>
+Constructs a polygon region from the point array <em>a</em>.
+<p> If <em>winding</em> is TRUE, the polygon region is filled using the
+winding algorithm, otherwise the default even-odd fill algorithm
+is used.
+<p> This constructor may create complex regions that will slow down
+painting when used.
+
+<h3 class=fn><a name="TQRegion-5"></a>TQRegion::TQRegion ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r )
+</h3>
+Constructs a new region which is equal to region <em>r</em>.
+
+<h3 class=fn><a name="TQRegion-6"></a>TQRegion::TQRegion ( const&nbsp;<a href="qbitmap.html">TQBitmap</a>&nbsp;&amp;&nbsp;bm )
+</h3>
+Constructs a region from the bitmap <em>bm</em>.
+<p> The resulting region consists of the pixels in bitmap <em>bm</em> that
+are <tt>color1</tt>, as if each pixel was a 1 by 1 rectangle.
+<p> This constructor may create complex regions that will slow down
+painting when used. Note that drawing masked pixmaps can be done
+much faster using <a href="qpixmap.html#setMask">TQPixmap::setMask</a>().
+
+<h3 class=fn><a name="~TQRegion"></a>TQRegion::~TQRegion ()
+</h3>
+Destroys the region.
+
+<h3 class=fn><a href="qrect.html">TQRect</a> <a name="boundingRect"></a>TQRegion::boundingRect () const
+</h3>
+Returns the bounding rectangle of this region. An empty region
+gives a rectangle that is <a href="qrect.html#isNull">TQRect::isNull</a>().
+
+<h3 class=fn>bool <a name="contains"></a>TQRegion::contains ( const&nbsp;<a href="qpoint.html">TQPoint</a>&nbsp;&amp;&nbsp;p ) const
+</h3>
+Returns TRUE if the region contains the point <em>p</em>; otherwise
+returns FALSE.
+
+<h3 class=fn>bool <a name="contains-2"></a>TQRegion::contains ( const&nbsp;<a href="qrect.html">TQRect</a>&nbsp;&amp;&nbsp;r ) const
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Returns TRUE if the region overlaps the rectangle <em>r</em>; otherwise
+returns FALSE.
+
+<h3 class=fn><a href="qregion.html">TQRegion</a> <a name="eor"></a>TQRegion::eor ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r ) const
+</h3>
+Returns a region which is the exclusive or (XOR) of this region
+and <em>r</em>.
+<p> <center><img src="rxor.png" alt="Region XORed"></center>
+<p> The figure shows the exclusive or of two elliptical regions.
+
+<h3 class=fn>HRGN <a name="handle"></a>TQRegion::handle () const
+</h3>
+
+<p> Returns the region's handle.
+
+<h3 class=fn><a href="qregion.html">TQRegion</a> <a name="intersect"></a>TQRegion::intersect ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r ) const
+</h3>
+Returns a region which is the intersection of this region and <em>r</em>.
+<p> <center><img src="rintersect.png" alt="Region Intersection"></center>
+<p> The figure shows the intersection of two elliptical regions.
+
+<h3 class=fn>bool <a name="isEmpty"></a>TQRegion::isEmpty () const
+</h3>
+Returns TRUE if the region is empty; otherwise returns FALSE. An
+empty region is a region that contains no points.
+<p> Example:
+<pre>
+ TQRegion r1( 10, 10, 20, 20 );
+ TQRegion r2( 40, 40, 20, 20 );
+ TQRegion r3;
+ r1.<a href="#isNull">isNull</a>(); // FALSE
+ r1.<a href="#isEmpty">isEmpty</a>(); // FALSE
+ r3.<a href="#isNull">isNull</a>(); // TRUE
+ r3.<a href="#isEmpty">isEmpty</a>(); // TRUE
+ r3 = r1.<a href="#intersect">intersect</a>( r2 ); // r3 = intersection of r1 and r2
+ r3.<a href="#isNull">isNull</a>(); // FALSE
+ r3.<a href="#isEmpty">isEmpty</a>(); // TRUE
+ r3 = r1.<a href="#unite">unite</a>( r2 ); // r3 = union of r1 and r2
+ r3.<a href="#isNull">isNull</a>(); // FALSE
+ r3.<a href="#isEmpty">isEmpty</a>(); // FALSE
+ </pre>
+
+<p> <p>See also <a href="#isNull">isNull</a>().
+
+<h3 class=fn>bool <a name="isNull"></a>TQRegion::isNull () const
+</h3>
+Returns TRUE if the region is a null region; otherwise returns
+FALSE.
+<p> A null region is a region that has not been initialized. A null
+region is always empty.
+<p> <p>See also <a href="#isEmpty">isEmpty</a>().
+
+<h3 class=fn>bool <a name="operator!-eq"></a>TQRegion::operator!= ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r ) const
+</h3>
+
+<p> Returns TRUE if the region is different from <em>r</em>; otherwise
+returns FALSE.
+
+<h3 class=fn>const&nbsp;<a href="qregion.html">TQRegion</a> <a name="operator-and"></a>TQRegion::operator&amp; ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r ) const
+</h3>
+Applies the <a href="#intersect">intersect</a>() function to this region and <em>r</em>. <tt>r1&amp;r2</tt>
+is equivalent to <tt>r1.intersect(r2)</tt>
+<p> <p>See also <a href="#intersect">intersect</a>().
+
+<h3 class=fn><a href="qregion.html">TQRegion</a>&nbsp;&amp; <a name="operator-and-eq"></a>TQRegion::operator&amp;= ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r )
+</h3>
+Applies the <a href="#intersect">intersect</a>() function to this region and <em>r</em> and
+assigns the result to this region. <tt>r1&amp;=r2</tt> is equivalent to <tt>r1=r1.intersect(r2)</tt>
+<p> <p>See also <a href="#intersect">intersect</a>().
+
+<h3 class=fn>const&nbsp;<a href="qregion.html">TQRegion</a> <a name="operator+"></a>TQRegion::operator+ ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r ) const
+</h3>
+Applies the <a href="#unite">unite</a>() function to this region and <em>r</em>. <tt>r1+r2</tt> is
+equivalent to <tt>r1.unite(r2)</tt>
+<p> <p>See also <a href="#unite">unite</a>() and <a href="#operator|">operator|</a>().
+
+<h3 class=fn><a href="qregion.html">TQRegion</a>&nbsp;&amp; <a name="operator+-eq"></a>TQRegion::operator+= ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r )
+</h3>
+Applies the <a href="#unite">unite</a>() function to this region and <em>r</em> and assigns
+the result to this region. <tt>r1+=r2</tt> is equivalent to <tt>r1=r1.unite(r2)</tt>
+<p> <p>See also <a href="#intersect">intersect</a>().
+
+<h3 class=fn>const&nbsp;<a href="qregion.html">TQRegion</a> <a name="operator-"></a>TQRegion::operator- ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r ) const
+</h3>
+Applies the <a href="#subtract">subtract</a>() function to this region and <em>r</em>. <tt>r1-r2</tt>
+is equivalent to <tt>r1.subtract(r2)</tt>
+<p> <p>See also <a href="#subtract">subtract</a>().
+
+<h3 class=fn><a href="qregion.html">TQRegion</a>&nbsp;&amp; <a name="operator--eq"></a>TQRegion::operator-= ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r )
+</h3>
+Applies the <a href="#subtract">subtract</a>() function to this region and <em>r</em> and
+assigns the result to this region. <tt>r1-=r2</tt> is equivalent to <tt>r1=r1.subtract(r2)</tt>
+<p> <p>See also <a href="#subtract">subtract</a>().
+
+<h3 class=fn><a href="qregion.html">TQRegion</a>&nbsp;&amp; <a name="operator-eq"></a>TQRegion::operator= ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r )
+</h3>
+Assigns <em>r</em> to this region and returns a reference to the region.
+
+<h3 class=fn>bool <a name="operator-eq-eq"></a>TQRegion::operator== ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r ) const
+</h3>
+Returns TRUE if the region is equal to <em>r</em>; otherwise returns
+FALSE.
+
+<h3 class=fn>const&nbsp;<a href="qregion.html">TQRegion</a> <a name="operator^"></a>TQRegion::operator^ ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r ) const
+</h3>
+Applies the <a href="#eor">eor</a>() function to this region and <em>r</em>. <tt>r1^r2</tt> is
+equivalent to <tt>r1.eor(r2)</tt>
+<p> <p>See also <a href="#eor">eor</a>().
+
+<h3 class=fn><a href="qregion.html">TQRegion</a>&nbsp;&amp; <a name="operator^-eq"></a>TQRegion::operator^= ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r )
+</h3>
+Applies the <a href="#eor">eor</a>() function to this region and <em>r</em> and
+assigns the result to this region. <tt>r1^=r2</tt> is equivalent to <tt>r1=r1.eor(r2)</tt>
+<p> <p>See also <a href="#eor">eor</a>().
+
+<h3 class=fn>const&nbsp;<a href="qregion.html">TQRegion</a> <a name="operator|"></a>TQRegion::operator| ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r ) const
+</h3>
+Applies the <a href="#unite">unite</a>() function to this region and <em>r</em>. <tt>r1|r2</tt> is
+equivalent to <tt>r1.unite(r2)</tt>
+<p> <p>See also <a href="#unite">unite</a>() and <a href="#operator+">operator+</a>().
+
+<h3 class=fn><a href="qregion.html">TQRegion</a>&nbsp;&amp; <a name="operator|-eq"></a>TQRegion::operator|= ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r )
+</h3>
+Applies the <a href="#unite">unite</a>() function to this region and <em>r</em> and assigns
+the result to this region. <tt>r1|=r2</tt> is equivalent to <tt>r1=r1.unite(r2)</tt>
+<p> <p>See also <a href="#unite">unite</a>().
+
+<h3 class=fn><a href="qmemarray.html">TQMemArray</a>&lt;TQRect&gt; <a name="rects"></a>TQRegion::rects () const
+</h3>
+Returns an array of non-overlapping rectangles that make up the
+region.
+<p> The union of all the rectangles is equal to the original region.
+
+<h3 class=fn><a href="qregion.html">TQRegion</a> <a name="subtract"></a>TQRegion::subtract ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r ) const
+</h3>
+Returns a region which is <em>r</em> subtracted from this region.
+<p> <center><img src="rsubtract.png" alt="Region Subtraction"></center>
+<p> The figure shows the result when the ellipse on the right is
+subtracted from the ellipse on the left. (<tt>left-right</tt> )
+
+<h3 class=fn>void <a name="translate"></a>TQRegion::translate ( int&nbsp;dx, int&nbsp;dy )
+</h3>
+Translates (moves) the region <em>dx</em> along the X axis and <em>dy</em>
+along the Y axis.
+
+<h3 class=fn><a href="qregion.html">TQRegion</a> <a name="unite"></a>TQRegion::unite ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r ) const
+</h3>
+Returns a region which is the union of this region and <em>r</em>.
+<p> <center><img src="runion.png" alt="Region Union"></center>
+<p> The figure shows the union of two elliptical regions.
+
+<hr><h2>Related Functions</h2>
+<h3 class=fn><a href="qdatastream.html">TQDataStream</a>&nbsp;&amp; <a name="operator-lt-lt"></a>operator&lt;&lt; ( <a href="qdatastream.html">TQDataStream</a>&nbsp;&amp;&nbsp;s, const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r )
+</h3>
+
+<p> Writes the region <em>r</em> to the stream <em>s</em> and returns a reference
+to the stream.
+<p> <p>See also <a href="datastreamformat.html">Format of the TQDataStream operators</a>.
+
+<h3 class=fn><a href="qdatastream.html">TQDataStream</a>&nbsp;&amp; <a name="operator-gt-gt"></a>operator&gt;&gt; ( <a href="qdatastream.html">TQDataStream</a>&nbsp;&amp;&nbsp;s, <a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r )
+</h3>
+
+<p> Reads a region from the stream <em>s</em> into <em>r</em> and returns a
+reference to the stream.
+<p> <p>See also <a href="datastreamformat.html">Format of the TQDataStream operators</a>.
+
+<!-- eof -->
+<hr><p>
+This file is part of the <a href="index.html">TQt toolkit</a>.
+Copyright &copy; 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 &copy; 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>