189 lines
4.6 KiB
Groff
189 lines
4.6 KiB
Groff
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.\" $Xorg: XtCallCbks.man,v 1.3 2000/08/17 19:41:59 cpqbld Exp $
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.\"
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.\" Copyright (c) 1993, 1994 X Consortium
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.\"
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.\" Permission is hereby granted, free of charge, to any person obtaining a
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.\" copy of this software and associated documentation files (the "Software"),
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.\" to deal in the Software without restriction, including without limitation
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.\" the rights to use, copy, modify, merge, publish, distribute, sublicense,
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.\" and/or sell copies of the Software, and to permit persons to whom the
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.\" Software furnished to do so, subject to the following conditions:
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.\"
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.\" The above copyright notice and this permission notice shall be included in
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.\" 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 OR
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.\" IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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.\" FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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.\" THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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.\" WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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.\" OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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.\" SOFTWARE.
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.\"
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.\" Except as contained in this notice, the name of the X Consortium shall not
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.\" be used in advertising or otherwise to promote the sale, use or other
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.\" dealing in this Software without prior written authorization from the
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.\" X Consortium.
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.\"
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.\" $XFree86: xc/doc/man/Xt/XtCallCbks.man,v 1.3 2001/02/09 03:47:50 tsi Exp $
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.\"
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.ds tk X Toolkit
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.ds xT X Toolkit Intrinsics \- C Language Interface
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.ds xI Intrinsics
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.ds xW X Toolkit Athena Widgets \- C Language 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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.ds Rn 3
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.ds Vn 2.2
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.hw XtCall-Callbacks XtHas-Callbacks XtCall-Callbacks-List wid-get
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.na
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.de Ds
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.\" heavy for your eyes...
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.\"
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.ie "\\*(.T"480" .ft L
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.el .ie "\\*(.T"300" .ft L
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..
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.ny0
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.TH XtCallCallbacks __libmansuffix__ __xorgversion__ "XT FUNCTIONS"
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.SH NAME
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XtCallCallbacks, XtCallCallbackList, XtHasCallbacks \- process callbacks
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.SH SYNTAX
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.HP
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void XtCallCallbacks(Widget \fIw\fP, String \fIcallback_name\fP, XtPointer
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\fIcall_data\fP);
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.HP
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void XtCallCallbackList(Widget \fIw\fP, XtCallbackList \fIcallbacks\fP,
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XtPointer \fIcall_data\fP);
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.LP
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typedef enum {XtCallbackNoList, XtCallbackHasNone, XtCallbackHasSome}
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XtCallbackStatus;
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.HP
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XtCallbackStatus XtHasCallbacks(Widget \fIw\fP, String \fIcallback_name\fP);
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.SH ARGUMENTS
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.ds Cn \ to be executed or checked
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.IP \fIcallback_name\fP 1i
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Specifies the callback list\*(Cn.
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.IP \fIcall_data\fP 1i
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Specifies a callback-list specific data value to pass to each of the callback
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procedure in the list.
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.IP \fIcallbacks\fP 1i
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Specifies the callback list to be executed.
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.IP \fIw\fP 1i
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Specifies the widget.
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.SH DESCRIPTION
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The
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.ZN XtCallCallbacks
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function calls each procedure that is registered in the specified widget's
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callback list.
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.LP
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If \fIcallbacks\fP is not NULL,
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.ZN XtCallCallbackList
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calls each of the callback procedures in the list, passing client data
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and \fIcall_data\fP. The \fIcallbacks\fP parameter must specify the
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contents of a widget or object resource declared with representation
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type
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.ZN XtRCallback .
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.LP
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The
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.ZN XtHasCallbacks
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function first checks to see if the widget has a callback list identified
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by callback_name.
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If the callback list does not exist,
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.ZN XtHasCallbacks
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returns
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.ZN XtCallbackNoList .
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If the callback list exists but is empty,
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it returns
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.ZN XtCallbackHasNone .
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If the callback list exists and has at least one callback registered,
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it returns
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.ZN XtCallbackHasSome .
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.SH "SEE ALSO"
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XtAddCallback(3Xt)
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.br
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\fI\*(xT\fP
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.br
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\fI\*(xL\fP
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