2006-11-25 09:33:55 -07:00
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.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium
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.\"
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.\" Permission is hereby granted, free of charge, to any person obtaining
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.\" a copy of this software and associated documentation files (the
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.\" "Software"), to deal in the Software without restriction, including
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.\" without limitation the rights to use, copy, modify, merge, publish,
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.\" distribute, sublicense, and/or sell copies of the Software, and to
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.\" permit persons to whom the Software is furnished to do so, subject to
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.\" the following conditions:
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.\"
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.\" The above copyright notice and this permission notice shall be included
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.\" in all copies or substantial portions of the Software.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
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.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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.\" OTHER DEALINGS IN THE SOFTWARE.
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.\"
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.\" Except as contained in this notice, the name of the X Consortium shall
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.\" not be used in advertising or otherwise to promote the sale, use or
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.\" other dealings in this Software without prior written authorization
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.\" from the X Consortium.
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.\"
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.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
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.\" Digital Equipment Corporation
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.\"
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.\" Portions Copyright \(co 1990, 1991 by
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.\" Tektronix, Inc.
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.\"
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.\" Permission to use, copy, modify and distribute this documentation for
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.\" any purpose and without fee is hereby granted, provided that the above
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.\" copyright notice appears in all copies and that both that copyright notice
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.\" and this permission notice appear in all copies, and that the names of
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.\" Digital and Tektronix not be used in in advertising or publicity pertaining
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.\" to this documentation without specific, written prior permission.
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.\" Digital and Tektronix makes no representations about the suitability
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.\" of this documentation for any purpose.
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.\" It is provided ``as is'' without express or implied warranty.
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.\"
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.\"
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.ds xT X Toolkit Intrinsics \- C Language Interface
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.ds xW Athena X Widgets \- C Language X Toolkit Interface
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.ds xL Xlib \- C Language X Interface
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.ds xC Inter-Client Communication Conventions Manual
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.na
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.de Ds
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.nf
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.\\$1D \\$2 \\$1
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2013-04-28 10:55:55 -06:00
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.ft CW
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2006-11-25 09:33:55 -07:00
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.\".ps \\n(PS
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.\".if \\n(VS>=40 .vs \\n(VSu
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.\".if \\n(VS<=39 .vs \\n(VSp
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..
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.de De
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.ce 0
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.if \\n(BD .DF
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.nr BD 0
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.in \\n(OIu
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.if \\n(TM .ls 2
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.sp \\n(DDu
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.fi
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..
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.de IN \" send an index entry to the stderr
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..
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.de Pn
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.ie t \\$1\fB\^\\$2\^\fR\\$3
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.el \\$1\fI\^\\$2\^\fP\\$3
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..
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.de ZN
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.ie t \fB\^\\$1\^\fR\\$2
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.el \fI\^\\$1\^\fP\\$2
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..
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.de hN
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.ie t <\fB\\$1\fR>\\$2
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.el <\fI\\$1\fP>\\$2
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..
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.ny0
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.TH XNextEvent __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
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.SH NAME
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XNextEvent, XPeekEvent, XWindowEvent, XCheckWindowEvent, XMaskEvent, XCheckMaskEvent, XCheckTypedEvent, XCheckTypedWindowEvent \- select events by type
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.SH SYNTAX
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.HP
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int XNextEvent\^(\^Display *\fIdisplay\fP\^, XEvent *\fIevent_return\fP\^);
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.HP
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int XPeekEvent\^(\^Display *\fIdisplay\fP\^, XEvent *\fIevent_return\fP\^);
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.HP
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int XWindowEvent\^(\^Display *\fIdisplay\fP\^, Window \fIw\fP\^, long
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\fIevent_mask\fP\^, XEvent *\fIevent_return\fP\^);
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.HP
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Bool XCheckWindowEvent\^(\^Display *\fIdisplay\fP\^, Window \fIw\fP\^, long
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\fIevent_mask\fP\^, XEvent *\fIevent_return\fP\^);
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.HP
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int XMaskEvent\^(\^Display *\fIdisplay\fP\^, long \fIevent_mask\fP\^, XEvent
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*\fIevent_return\fP\^);
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.HP
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Bool XCheckMaskEvent\^(\^Display *\fIdisplay\fP\^, long \fIevent_mask\fP\^,
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XEvent *\fIevent_return\fP\^);
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.HP
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Bool XCheckTypedEvent\^(\^Display *\fIdisplay\fP\^, int \fIevent_type\fP\^,
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XEvent *\fIevent_return\fP\^);
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.HP
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Bool XCheckTypedWindowEvent\^(\^Display *\fIdisplay\fP\^, Window \fIw\fP\^,
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int \fIevent_type\fP\^, XEvent *\fIevent_return\fP\^);
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.SH ARGUMENTS
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.IP \fIdisplay\fP 1i
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Specifies the connection to the X server.
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.IP \fIevent_mask\fP 1i
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Specifies the event mask.
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.IP \fIevent_return\fP 1i
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Returns the matched event's associated structure.
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.IP \fIevent_return\fP 1i
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Returns the next event in the queue.
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.IP \fIevent_return\fP 1i
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Returns a copy of the matched event's associated structure.
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.IP \fIevent_type\fP 1i
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Specifies the event type to be compared.
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.ds Wi \ whose event uou are interested in
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.IP \fIw\fP 1i
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Specifies the window \*(Wi.
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.SH DESCRIPTION
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The
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.ZN XNextEvent
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function copies the first event from the event queue into the specified
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.ZN XEvent
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structure and then removes it from the queue.
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If the event queue is empty,
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.ZN XNextEvent
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flushes the output buffer and blocks until an event is received.
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.LP
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The
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.ZN XPeekEvent
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function returns the first event from the event queue,
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but it does not remove the event from the queue.
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If the queue is empty,
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.ZN XPeekEvent
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flushes the output buffer and blocks until an event is received.
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It then copies the event into the client-supplied
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.ZN XEvent
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structure without removing it from the event queue.
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.LP
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The
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.ZN XWindowEvent
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function searches the event queue for an event that matches both the specified
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window and event mask.
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When it finds a match,
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.ZN XWindowEvent
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removes that event from the queue and copies it into the specified
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.ZN XEvent
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structure.
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The other events stored in the queue are not discarded.
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If a matching event is not in the queue,
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.ZN XWindowEvent
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flushes the output buffer and blocks until one is received.
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.LP
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The
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.ZN XCheckWindowEvent
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function searches the event queue and then the events available
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on the server connection for the first event that matches the specified window
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and event mask.
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If it finds a match,
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.ZN XCheckWindowEvent
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removes that event, copies it into the specified
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.ZN XEvent
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structure, and returns
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.ZN True .
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The other events stored in the queue are not discarded.
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If the event you requested is not available,
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.ZN XCheckWindowEvent
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returns
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.ZN False ,
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and the output buffer will have been flushed.
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.LP
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The
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.ZN XMaskEvent
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function searches the event queue for the events associated with the
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specified mask.
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When it finds a match,
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.ZN XMaskEvent
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removes that event and copies it into the specified
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.ZN XEvent
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structure.
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The other events stored in the queue are not discarded.
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If the event you requested is not in the queue,
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.ZN XMaskEvent
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flushes the output buffer and blocks until one is received.
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.LP
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The
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.ZN XCheckMaskEvent
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function searches the event queue and then any events available on the
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server connection for the first event that matches the specified mask.
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If it finds a match,
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.ZN XCheckMaskEvent
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removes that event, copies it into the specified
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.ZN XEvent
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structure, and returns
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.ZN True .
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The other events stored in the queue are not discarded.
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If the event you requested is not available,
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.ZN XCheckMaskEvent
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returns
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.ZN False ,
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and the output buffer will have been flushed.
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.LP
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The
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.ZN XCheckTypedEvent
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function searches the event queue and then any events available
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on the server connection for the first event that matches the specified type.
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If it finds a match,
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.ZN XCheckTypedEvent
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removes that event, copies it into the specified
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.ZN XEvent
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structure, and returns
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.ZN True .
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The other events in the queue are not discarded.
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If the event is not available,
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.ZN XCheckTypedEvent
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returns
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.ZN False ,
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and the output buffer will have been flushed.
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.LP
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The
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.ZN XCheckTypedWindowEvent
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function searches the event queue and then any events available
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on the server connection for the first event that matches the specified
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type and window.
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If it finds a match,
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.ZN XCheckTypedWindowEvent
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removes the event from the queue, copies it into the specified
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.ZN XEvent
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structure, and returns
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.ZN True .
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The other events in the queue are not discarded.
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If the event is not available,
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.ZN XCheckTypedWindowEvent
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returns
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.ZN False ,
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and the output buffer will have been flushed.
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.SH "SEE ALSO"
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2010-05-18 13:37:28 -06:00
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XAnyEvent(__libmansuffix__),
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XIfEvent(__libmansuffix__),
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XPutBackEvent(__libmansuffix__),
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XSendEvent(__libmansuffix__)
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2006-11-25 09:33:55 -07:00
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.br
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\fI\*(xL\fP
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