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Diffstat (limited to 'doc/CrtGenHdlr.3')
-rw-r--r-- | doc/CrtGenHdlr.3 | 166 |
1 files changed, 83 insertions, 83 deletions
diff --git a/doc/CrtGenHdlr.3 b/doc/CrtGenHdlr.3 index 095361f..004e01a 100644 --- a/doc/CrtGenHdlr.3 +++ b/doc/CrtGenHdlr.3 @@ -1,83 +1,83 @@ -'\"
-'\" Copyright (c) 1992-1994 The Regents of the University of California.
-'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
-'\"
-'\" See the file "license.terms" for information on usage and redistribution
-'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-'\"
-'\" RCS: @(#) $Id: CrtGenHdlr.3,v 1.4 2008/06/30 22:57:01 dkf Exp $
-'\"
-.so man.macros
-.TH Tk_CreateGenericHandler 3 "" Tk "Tk Library Procedures"
-.BS
-.SH NAME
-Tk_CreateGenericHandler, Tk_DeleteGenericHandler \- associate procedure callback with all X events
-.SH SYNOPSIS
-.nf
-\fB#include <tk.h>\fR
-.sp
-\fBTk_CreateGenericHandler\fR(\fIproc, clientData\fR)
-.sp
-\fBTk_DeleteGenericHandler\fR(\fIproc, clientData\fR)
-.SH ARGUMENTS
-.AS "Tk_GenericProc" clientData
-.AP Tk_GenericProc *proc in
-Procedure to invoke whenever any X event occurs on any display.
-.AP ClientData clientData in
-Arbitrary one-word value to pass to \fIproc\fR.
-.BE
-.SH DESCRIPTION
-.PP
-\fBTk_CreateGenericHandler\fR arranges for \fIproc\fR to be
-invoked in the future whenever any X event occurs. This mechanism is
-\fInot\fR intended for dispatching X events on windows managed by Tk
-(you should use \fBTk_CreateEventHandler\fR for this purpose).
-\fBTk_CreateGenericHandler\fR is intended for other purposes, such
-as tracing X events, monitoring events on windows not owned by Tk,
-accessing X-related libraries that were not originally designed for
-use with Tk, and so on.
-.PP
-The callback to \fIproc\fR will be made by \fBTk_HandleEvent\fR;
-this mechanism only works in programs that dispatch events
-through \fBTk_HandleEvent\fR (or through other Tk procedures that
-call \fBTk_HandleEvent\fR, such as \fBTk_DoOneEvent\fR or
-\fBTk_MainLoop\fR).
-.PP
-\fIProc\fR should have arguments and result that match the
-type \fBTk_GenericProc\fR:
-.CS
-typedef int \fBTk_GenericProc\fR(
- ClientData \fIclientData\fR,
- XEvent *\fIeventPtr\fR);
-.CE
-The \fIclientData\fR parameter to \fIproc\fR is a copy of the \fIclientData\fR
-argument given to \fBTk_CreateGenericHandler\fR when the callback
-was created. Typically, \fIclientData\fR points to a data
-structure containing application-specific information about
-how to handle events.
-\fIEventPtr\fR is a pointer to the X event.
-.PP
-Whenever an X event is processed by \fBTk_HandleEvent\fR, \fIproc\fR
-is called. The return value from \fIproc\fR is normally 0.
-A non-zero return value indicates that the event is not to be handled
-further; that is, \fIproc\fR has done all processing that is to be
-allowed for the event.
-.PP
-If there are multiple generic event handlers, each one is called
-for each event, in the order in which they were established.
-.PP
-\fBTk_DeleteGenericHandler\fR may be called to delete a
-previously-created generic event handler: it deletes each handler
-it finds that matches the \fIproc\fR and \fIclientData\fR arguments. If
-no such handler exists, then \fBTk_DeleteGenericHandler\fR returns
-without doing anything. Although Tk supports it, it's probably
-a bad idea to have more than one callback with the same
-\fIproc\fR and \fIclientData\fR arguments.
-.PP
-Establishing a generic event handler does nothing to ensure that the
-process will actually receive the X events that the handler wants to
-process.
-For example, it is the caller's responsibility to invoke
-\fBXSelectInput\fR to select the desired events, if that is necessary.
-.SH KEYWORDS
-bind, callback, event, handler
+'\" +'\" Copyright (c) 1992-1994 The Regents of the University of California. +'\" Copyright (c) 1994-1996 Sun Microsystems, Inc. +'\" +'\" See the file "license.terms" for information on usage and redistribution +'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. +'\" +'\" RCS: @(#) $Id: CrtGenHdlr.3,v 1.5 2008/07/08 22:40:50 patthoyts Exp $ +'\" +.so man.macros +.TH Tk_CreateGenericHandler 3 "" Tk "Tk Library Procedures" +.BS +.SH NAME +Tk_CreateGenericHandler, Tk_DeleteGenericHandler \- associate procedure callback with all X events +.SH SYNOPSIS +.nf +\fB#include <tk.h>\fR +.sp +\fBTk_CreateGenericHandler\fR(\fIproc, clientData\fR) +.sp +\fBTk_DeleteGenericHandler\fR(\fIproc, clientData\fR) +.SH ARGUMENTS +.AS "Tk_GenericProc" clientData +.AP Tk_GenericProc *proc in +Procedure to invoke whenever any X event occurs on any display. +.AP ClientData clientData in +Arbitrary one-word value to pass to \fIproc\fR. +.BE +.SH DESCRIPTION +.PP +\fBTk_CreateGenericHandler\fR arranges for \fIproc\fR to be +invoked in the future whenever any X event occurs. This mechanism is +\fInot\fR intended for dispatching X events on windows managed by Tk +(you should use \fBTk_CreateEventHandler\fR for this purpose). +\fBTk_CreateGenericHandler\fR is intended for other purposes, such +as tracing X events, monitoring events on windows not owned by Tk, +accessing X-related libraries that were not originally designed for +use with Tk, and so on. +.PP +The callback to \fIproc\fR will be made by \fBTk_HandleEvent\fR; +this mechanism only works in programs that dispatch events +through \fBTk_HandleEvent\fR (or through other Tk procedures that +call \fBTk_HandleEvent\fR, such as \fBTk_DoOneEvent\fR or +\fBTk_MainLoop\fR). +.PP +\fIProc\fR should have arguments and result that match the +type \fBTk_GenericProc\fR: +.CS +typedef int \fBTk_GenericProc\fR( + ClientData \fIclientData\fR, + XEvent *\fIeventPtr\fR); +.CE +The \fIclientData\fR parameter to \fIproc\fR is a copy of the \fIclientData\fR +argument given to \fBTk_CreateGenericHandler\fR when the callback +was created. Typically, \fIclientData\fR points to a data +structure containing application-specific information about +how to handle events. +\fIEventPtr\fR is a pointer to the X event. +.PP +Whenever an X event is processed by \fBTk_HandleEvent\fR, \fIproc\fR +is called. The return value from \fIproc\fR is normally 0. +A non-zero return value indicates that the event is not to be handled +further; that is, \fIproc\fR has done all processing that is to be +allowed for the event. +.PP +If there are multiple generic event handlers, each one is called +for each event, in the order in which they were established. +.PP +\fBTk_DeleteGenericHandler\fR may be called to delete a +previously-created generic event handler: it deletes each handler +it finds that matches the \fIproc\fR and \fIclientData\fR arguments. If +no such handler exists, then \fBTk_DeleteGenericHandler\fR returns +without doing anything. Although Tk supports it, it's probably +a bad idea to have more than one callback with the same +\fIproc\fR and \fIclientData\fR arguments. +.PP +Establishing a generic event handler does nothing to ensure that the +process will actually receive the X events that the handler wants to +process. +For example, it is the caller's responsibility to invoke +\fBXSelectInput\fR to select the desired events, if that is necessary. +.SH KEYWORDS +bind, callback, event, handler |