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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QWheelEvent Class Reference</h1>
<p>The QWheelEvent class contains parameters that describe a wheel event.
<a href="#details">More...</a>
<p><tt>#include <<a href="qevent-h.html">qevent.h</a>></tt>
<p>Inherits <a href="qevent.html">QEvent</a>.
<p><a href="qwheelevent-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li><div class=fn><a href="#QWheelEvent"><b>QWheelEvent</b></a> ( const QPoint & pos, int delta, int state, Orientation orient = Vertical )</div></li>
<li><div class=fn><a href="#QWheelEvent-2"><b>QWheelEvent</b></a> ( const QPoint & pos, const QPoint & globalPos, int delta, int state, Orientation orient = Vertical )</div></li>
<li><div class=fn>int <a href="#delta"><b>delta</b></a> () const</div></li>
<li><div class=fn>const QPoint & <a href="#pos"><b>pos</b></a> () const</div></li>
<li><div class=fn>const QPoint & <a href="#globalPos"><b>globalPos</b></a> () const</div></li>
<li><div class=fn>int <a href="#x"><b>x</b></a> () const</div></li>
<li><div class=fn>int <a href="#y"><b>y</b></a> () const</div></li>
<li><div class=fn>int <a href="#globalX"><b>globalX</b></a> () const</div></li>
<li><div class=fn>int <a href="#globalY"><b>globalY</b></a> () const</div></li>
<li><div class=fn>ButtonState <a href="#state"><b>state</b></a> () const</div></li>
<li><div class=fn>Orientation <a href="#orientation"><b>orientation</b></a> () const</div></li>
<li><div class=fn>bool <a href="#isAccepted"><b>isAccepted</b></a> () const</div></li>
<li><div class=fn>void <a href="#accept"><b>accept</b></a> ()</div></li>
<li><div class=fn>void <a href="#ignore"><b>ignore</b></a> ()</div></li>
</ul>
<hr><a name="details"></a><h2>Detailed Description</h2>
The QWheelEvent class contains parameters that describe a wheel event.
<p> Wheel events occur when a mouse wheel is turned while the widget has
focus. The rotation distance is provided by <a href="#delta">delta</a>(). The functions
<a href="#pos">pos</a>() and <a href="#globalPos">globalPos</a>() return the mouse pointer location at the
time of the event.
<p> A wheel event contains a special accept flag that indicates whether the
receiver wants the event. You should call <a href="#accept">QWheelEvent::accept</a>() if you
handle the wheel event; otherwise it will be sent to the parent widget.
<p> The QWidget::setEnable() function can be used to enable or disable mouse
and keyboard events for a widget.
<p> The event handler <a href="qwidget.html#wheelEvent">QWidget::wheelEvent</a>() receives wheel events.
<p> <p>See also <a href="qmouseevent.html">QMouseEvent</a>, <a href="qwidget.html#grabMouse">QWidget::grabMouse</a>() and <a href="events.html">Event Classes</a>.
<hr><h2>Member Function Documentation</h2>
<h3 class=fn><a name="QWheelEvent"></a>QWheelEvent::QWheelEvent ( const <a href="qpoint.html">QPoint</a> & pos, int delta, int state, <a href="qt.html#Orientation-enum">Orientation</a> orient = Vertical )
</h3>
<p> Constructs a wheel event object.
<p> The <a href="#globalPos">globalPos</a>() is initialized to <a href="qcursor.html#pos">QCursor::pos</a>(), i.e. <em>pos</em>, which
is usually (but not always) right. Use the other constructor if you
need to specify the global position explicitly. <em>delta</em> contains
the rotation distance, <em>state</em> holds the keyboard modifier
flags at the time of the event and <em>orient</em> holds the wheel's orientation.
<p> <p>See also <a href="#pos">pos</a>(), <a href="#delta">delta</a>() and <a href="#state">state</a>().
<h3 class=fn><a name="QWheelEvent-2"></a>QWheelEvent::QWheelEvent ( const <a href="qpoint.html">QPoint</a> & pos, const <a href="qpoint.html">QPoint</a> & globalPos, int delta, int state, <a href="qt.html#Orientation-enum">Orientation</a> orient = Vertical )
</h3>
<p> Constructs a wheel event object. The position when the event
occurred is given in <em>pos</em> and <em>globalPos</em>. <em>delta</em> contains the
rotation distance, <em>state</em> holds the keyboard modifier flags at the
time of the event and <em>orient</em> holds the wheel's orientation.
<p> <p>See also <a href="#pos">pos</a>(), <a href="#globalPos">globalPos</a>(), <a href="#delta">delta</a>() and <a href="#state">state</a>().
<h3 class=fn>void <a name="accept"></a>QWheelEvent::accept ()
</h3>
Sets the accept flag of the wheel event object.
<p> Setting the accept parameter indicates that the receiver of the event wants
the wheel event. Unwanted wheel events are sent to the parent widget.
<p> The accept flag is set by default.
<p> <p>See also <a href="#ignore">ignore</a>().
<h3 class=fn>int <a name="delta"></a>QWheelEvent::delta () const
</h3>
<p> Returns the distance that the wheel is rotated expressed in
multiples or divisions of WHEEL_DELTA, which is currently set at 120.
A positive value indicates that the wheel was rotated
forwards away from the user; a negative value indicates that the
wheel was rotated backwards toward the user.
<p> The WHEEL_DELTA constant was set to 120 by the wheel mouse vendors
to allow building finer-resolution wheels in the future, including
perhaps a freely rotating wheel with no notches. The expectation is
that such a device would send more messages per rotation but with a
smaller value in each message.
<h3 class=fn>const <a href="qpoint.html">QPoint</a> & <a name="globalPos"></a>QWheelEvent::globalPos () const
</h3>
<p> Returns the global position of the mouse pointer <em>at the time</em> of
the event. This is important on asynchronous window systems
such as X11; whenever you move your widgets around in response to mouse
events, <a href="#globalPos">globalPos</a>() can differ a lot from the current pointer
position <a href="qcursor.html#pos">QCursor::pos</a>().
<p> <p>See also <a href="#globalX">globalX</a>() and <a href="#globalY">globalY</a>().
<h3 class=fn>int <a name="globalX"></a>QWheelEvent::globalX () const
</h3>
Returns the global X position of the mouse pointer at the time of the event.
<p>See also <a href="#globalY">globalY</a>() and <a href="#globalPos">globalPos</a>().
<h3 class=fn>int <a name="globalY"></a>QWheelEvent::globalY () const
</h3>
Returns the global Y position of the mouse pointer at the time of the event.
<p>See also <a href="#globalX">globalX</a>() and <a href="#globalPos">globalPos</a>().
<h3 class=fn>void <a name="ignore"></a>QWheelEvent::ignore ()
</h3>
Clears the accept flag parameter of the wheel event object.
<p> Clearing the accept parameter indicates that the event receiver does
not want the wheel event. Unwanted wheel events are sent to the parent widget.
The accept flag is set by default.
<p> <p>See also <a href="#accept">accept</a>().
<h3 class=fn>bool <a name="isAccepted"></a>QWheelEvent::isAccepted () const
</h3>
Returns TRUE if the receiver of the event handles the wheel event;
otherwise returns FALSE.
<h3 class=fn><a href="qt.html#Orientation-enum">Orientation</a> <a name="orientation"></a>QWheelEvent::orientation () const
</h3>
Returns the wheel's orientation.
<h3 class=fn>const <a href="qpoint.html">QPoint</a> & <a name="pos"></a>QWheelEvent::pos () const
</h3>
Returns the position of the mouse pointer, relative to the widget that
received the event.
<p> If you move your widgets around in response to mouse
events, use <a href="#globalPos">globalPos</a>() instead of this function.
<p> <p>See also <a href="#x">x</a>(), <a href="#y">y</a>() and <a href="#globalPos">globalPos</a>().
<h3 class=fn><a href="qt.html#ButtonState-enum">ButtonState</a> <a name="state"></a>QWheelEvent::state () const
</h3>
Returns the keyboard modifier flags of the event.
<p> The returned value is <a href="qt.html#ButtonState-enum">ShiftButton</a>, <a href="qt.html#ButtonState-enum">ControlButton</a>, and <a href="qt.html#ButtonState-enum">AltButton</a>
OR'ed together.
<h3 class=fn>int <a name="x"></a>QWheelEvent::x () const
</h3>
Returns the X position of the mouse pointer, relative to the widget that
received the event.
<p>See also <a href="#y">y</a>() and <a href="#pos">pos</a>().
<h3 class=fn>int <a name="y"></a>QWheelEvent::y () const
</h3>
Returns the Y position of the mouse pointer, relative to the widget that
received the event.
<p>See also <a href="#x">x</a>() and <a href="#pos">pos</a>().
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