1QWheelEvent(3qt) QWheelEvent(3qt)
2
6 QWheelEvent - Parameters that describe a wheel event
7
9 #include <qevent.h>
10 Inherits QEvent.
12 Public Members
14 QWheelEvent ( const QPoint & pos, int delta, int state, Orientation
15 orient = Vertical )
16 QWheelEvent ( const QPoint & pos, const QPoint & globalPos, int delta,
17 int state, Orientation orient = Vertical )
18 int delta () const
19 const QPoint & pos () const
20 const QPoint & globalPos () const
21 int x () const
22 int y () const
23 int globalX () const
24 int globalY () const
25 ButtonState state () const
26 Orientation orientation () const
27 bool isAccepted () const
28 void accept ()
29 void ignore ()
30
32 The QWheelEvent class contains parameters that describe a wheel event.
33 Wheel events are sent to the widget under the mouse, and if that widget
35 does not handle the event they are sent to the focus widget. The
36 rotation distance is provided by delta(). The functions pos() and
37 globalPos() return the mouse pointer location at the time of the event.
38 A wheel event contains a special accept flag that indicates whether the
40 receiver wants the event. You should call QWheelEvent::accept() if you
41 handle the wheel event; otherwise it will be sent to the parent widget.
42 The QWidget::setEnable() function can be used to enable or disable
44 mouse and keyboard events for a widget.
45 The event handler QWidget::wheelEvent() receives wheel events.
47 See also QMouseEvent, QWidget::grabMouse(), and Event Classes.
49
52 Orientation orient = Vertical )
53 Constructs a wheel event object.
54 The globalPos() is initialized to QCursor::pos(), i.e. pos, which is
56 usually (but not always) right. Use the other constructor if you need
57 to specify the global position explicitly. delta contains the rotation
58 distance, state holds the keyboard modifier flags at the time of the
59 event and orient holds the wheel's orientation.
60 See also pos(), delta(), and state().
62
64 delta, int state, Orientation orient = Vertical )
65 Constructs a wheel event object. The position when the event occurred
66 is given in pos and globalPos. delta contains the rotation distance,
67 state holds the keyboard modifier flags at the time of the event and
68 orient holds the wheel's orientation.
69 See also pos(), globalPos(), delta(), and state().
71
73 Sets the accept flag of the wheel event object.
74 Setting the accept parameter indicates that the receiver of the event
76 wants the wheel event. Unwanted wheel events are sent to the parent
77 widget.
78 The accept flag is set by default.
80 See also ignore().
82
84 Returns the distance that the wheel is rotated expressed in multiples
85 or divisions of the wheel delta, which is currently defined to be 120.
86 A positive value indicates that the wheel was rotated forwards away
87 from the user; a negative value indicates that the wheel was rotated
88 backwards toward the user.
89 The wheel delta constant was defined to be 120 by wheel mouse vendors
91 to allow building finer-resolution wheels in the future, including
92 perhaps a freely rotating wheel with no notches. The expectation is
93 that such a device would send more messages per rotation but with a
94 smaller value in each message.
95
97 Returns the global position of the mouse pointer at the time of the
98 event. This is important on asynchronous window systems such as X11;
99 whenever you move your widgets around in response to mouse events,
100 globalPos() can differ a lot from the current pointer position
101 QCursor::pos().
102 See also globalX() and globalY().
104
106 Returns the global x-position of the mouse pointer at the time of the
107 event.
108 See also globalY() and globalPos().
110
112 Returns the global y-position of the mouse pointer at the time of the
113 event.
114 See also globalX() and globalPos().
116
118 Clears the accept flag parameter of the wheel event object.
119 Clearing the accept parameter indicates that the event receiver does
121 not want the wheel event. Unwanted wheel events are sent to the parent
122 widget. The accept flag is set by default.
123 See also accept().
125
127 Returns TRUE if the receiver of the event handles the wheel event;
128 otherwise returns FALSE.
129
131 Returns the wheel's orientation.
132
134 Returns the position of the mouse pointer, relative to the widget that
135 received the event.
136 If you move your widgets around in response to mouse events, use
138 globalPos() instead of this function.
139 See also x(), y(), and globalPos().
141
143 Returns the keyboard modifier flags of the event.
144 The returned value is ShiftButton, ControlButton, and AltButton OR'ed
146 together.
147
149 Returns the x-position of the mouse pointer, relative to the widget
150 that received the event.
151 See also y() and pos().
153
155 Returns the y-position of the mouse pointer, relative to the widget
156 that received the event.
157 See also x() and pos().
159
162 http://doc.trolltech.com/qwheelevent.html
163 http://www.trolltech.com/faq/tech.html
164
166 Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com. See the
167 license file included in the distribution for a complete license
168 statement.
169
171 Generated automatically from the source code.
172
174 If you find a bug in Qt, please report it as described in
175 http://doc.trolltech.com/bughowto.html. Good bug reports help us to
176 help you. Thank you.
177 The definitive Qt documentation is provided in HTML format; it is
179 located at $QTDIR/doc/html and can be read using Qt Assistant or with a
180 web browser. This man page is provided as a convenience for those users
181 who prefer man pages, although this format is not officially supported
182 by Trolltech.
183 If you find errors in this manual page, please report them to qt-
185 bugs@trolltech.com. Please include the name of the manual page
186 (qwheelevent.3qt) and the Qt version (3.3.8).
187Trolltech AS 2 February 2007 QWheelEvent(3qt)