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diff --git a/libX11/man/XIfEvent.man b/libX11/man/XIfEvent.man new file mode 100644 index 000000000..17c483b45 --- /dev/null +++ b/libX11/man/XIfEvent.man @@ -0,0 +1,252 @@ +.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium +.\" +.\" Permission is hereby granted, free of charge, to any person obtaining +.\" a copy of this software and associated documentation files (the +.\" "Software"), to deal in the Software without restriction, including +.\" without limitation the rights to use, copy, modify, merge, publish, +.\" distribute, sublicense, and/or sell copies of the Software, and to +.\" permit persons to whom the Software is furnished to do so, subject to +.\" the following conditions: +.\" +.\" The above copyright notice and this permission notice shall be included +.\" in all copies or substantial portions of the Software. +.\" +.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR +.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +.\" OTHER DEALINGS IN THE SOFTWARE. +.\" +.\" Except as contained in this notice, the name of the X Consortium shall +.\" not be used in advertising or otherwise to promote the sale, use or +.\" other dealings in this Software without prior written authorization +.\" from the X Consortium. +.\" +.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by +.\" Digital Equipment Corporation +.\" +.\" Portions Copyright \(co 1990, 1991 by +.\" Tektronix, Inc. +.\" +.\" Permission to use, copy, modify and distribute this documentation for +.\" any purpose and without fee is hereby granted, provided that the above +.\" copyright notice appears in all copies and that both that copyright notice +.\" and this permission notice appear in all copies, and that the names of +.\" Digital and Tektronix not be used in in advertising or publicity pertaining +.\" to this documentation without specific, written prior permission. +.\" Digital and Tektronix makes no representations about the suitability +.\" of this documentation for any purpose. +.\" It is provided ``as is'' without express or implied warranty. +.\" +.\" $XFree86: xc/doc/man/X11/XIfEvent.man,v 1.3 2003/04/28 22:17:55 herrb Exp $ +.\" +.ds xT X Toolkit Intrinsics \- C Language Interface +.ds xW Athena X Widgets \- C Language X Toolkit Interface +.ds xL Xlib \- C Language X Interface +.ds xC Inter-Client Communication Conventions Manual +.na +.de Ds +.nf +.\\$1D \\$2 \\$1 +.ft 1 +.\".ps \\n(PS +.\".if \\n(VS>=40 .vs \\n(VSu +.\".if \\n(VS<=39 .vs \\n(VSp +.. +.de De +.ce 0 +.if \\n(BD .DF +.nr BD 0 +.in \\n(OIu +.if \\n(TM .ls 2 +.sp \\n(DDu +.fi +.. +.de FD +.LP +.KS +.TA .5i 3i +.ta .5i 3i +.nf +.. +.de FN +.fi +.KE +.LP +.. +.de IN \" send an index entry to the stderr +.. +.de C{ +.KS +.nf +.D +.\" +.\" choose appropriate monospace font +.\" the imagen conditional, 480, +.\" may be changed to L if LB is too +.\" heavy for your eyes... +.\" +.ie "\\*(.T"480" .ft L +.el .ie "\\*(.T"300" .ft L +.el .ie "\\*(.T"202" .ft PO +.el .ie "\\*(.T"aps" .ft CW +.el .ft R +.ps \\n(PS +.ie \\n(VS>40 .vs \\n(VSu +.el .vs \\n(VSp +.. +.de C} +.DE +.R +.. +.de Pn +.ie t \\$1\fB\^\\$2\^\fR\\$3 +.el \\$1\fI\^\\$2\^\fP\\$3 +.. +.de ZN +.ie t \fB\^\\$1\^\fR\\$2 +.el \fI\^\\$1\^\fP\\$2 +.. +.de hN +.ie t <\fB\\$1\fR>\\$2 +.el <\fI\\$1\fP>\\$2 +.. +.de NT +.ne 7 +.ds NO Note +.if \\n(.$>$1 .if !'\\$2'C' .ds NO \\$2 +.if \\n(.$ .if !'\\$1'C' .ds NO \\$1 +.ie n .sp +.el .sp 10p +.TB +.ce +\\*(NO +.ie n .sp +.el .sp 5p +.if '\\$1'C' .ce 99 +.if '\\$2'C' .ce 99 +.in +5n +.ll -5n +.R +.. +. \" Note End -- doug kraft 3/85 +.de NE +.ce 0 +.in -5n +.ll +5n +.ie n .sp +.el .sp 10p +.. +.ny0 +.TH XIfEvent __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS" +.SH NAME +XIfEvent, XCheckIfEvent, XPeekIfEvent \- check the event queue with a predicate procedure +.SH SYNTAX +.HP +int XIfEvent\^(\^Display *\fIdisplay\fP\^, XEvent *\fIevent_return\fP\^, Bool +(\^*\fIpredicate\fP\^)\^(\^)\^, XPointer \fIarg\fP\^); +.HP +Bool XCheckIfEvent\^(\^Display *\fIdisplay\fP\^, XEvent *\fIevent_return\fP\^, +Bool (\^*\fIpredicate\fP\^)\^(\^)\^, XPointer \fIarg\fP\^); +.HP +int XPeekIfEvent\^(\^Display *\fIdisplay\fP\^, XEvent *\fIevent_return\fP\^, +Bool (\^*\fIpredicate\fP\^)\^(\^)\^, XPointer \fIarg\fP\^); +.SH ARGUMENTS +.IP \fIarg\fP 1i +Specifies the user-supplied argument that will be passed to the predicate procedure. +.IP \fIdisplay\fP 1i +Specifies the connection to the X server. +.ds Ev \ either a copy of or +.IP \fIevent_return\fP 1i +Returns\*(Ev the matched event's associated structure. +.IP \fIpredicate\fP 1i +Specifies the procedure that is to be called to determine +if the next event in the queue matches what you want. +.SH DESCRIPTION +The +.ZN XIfEvent +function completes only when the specified predicate +procedure returns +.ZN True +for an event, +which indicates an event in the queue matches. +.ZN XIfEvent +flushes the output buffer if it blocks waiting for additional events. +.ZN XIfEvent +removes the matching event from the queue +and copies the structure into the client-supplied +.ZN XEvent +structure. +.LP +When the predicate procedure finds a match, +.ZN XCheckIfEvent +copies the matched event into the client-supplied +.ZN XEvent +structure and returns +.ZN True . +(This event is removed from the queue.) +If the predicate procedure finds no match, +.ZN XCheckIfEvent +returns +.ZN False , +and the output buffer will have been flushed. +All earlier events stored in the queue are not discarded. +.LP +The +.ZN XPeekIfEvent +function returns only when the specified predicate +procedure returns +.ZN True +for an event. +After the predicate procedure finds a match, +.ZN XPeekIfEvent +copies the matched event into the client-supplied +.ZN XEvent +structure without removing the event from the queue. +.ZN XPeekIfEvent +flushes the output buffer if it blocks waiting for additional events. +.LP +Each of these functions requires you to pass a predicate procedure that +determines if an event matches what you want. +Your predicate procedure must decide if the event is useful +without calling any Xlib functions. +If the predicate directly or indirectly causes the state of the event queue +to change, the result is not defined. +If Xlib has been initialized for threads, the predicate is called with +the display locked and the result of a call by the predicate to any +Xlib function that locks the display is not defined unless the caller +has first called +.ZN XLockDisplay . +.LP +The predicate procedure and its associated arguments are: +.HP +Bool (\^*\fIpredicate\fP\^)\^(\^Display *\fIdisplay\fP, XEvent *\fIevent\fP, XPointer \fIarg\fP\^) +.IP \fIdisplay\fP 1i +Specifies the connection to the X server. +.IP \fIevent\fP 1i +Specifies the +.ZN XEvent +structure. +.IP \fIarg\fP 1i +Specifies the argument passed in from the +.ZN XIfEvent , +.ZN XCheckIfEvent , +or +.ZN XPeekIfEvent +function. +.LP +The predicate procedure is called once for each +event in the queue until it finds a match. +After finding a match, the predicate procedure must return +.ZN True . +If it did not find a match, it must return +.ZN False . +.SH "SEE ALSO" +XAnyEvent(3X11), +XNextEvent(3X11), +XPutBackEvent(3X11) +XSendEvent(3X11) +.br +\fI\*(xL\fP |