155 lines
2.7 KiB
Plaintext
155 lines
2.7 KiB
Plaintext
.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 XtMake-Geometry-Request XtQuery-Geometry wid-get
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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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.ft 1
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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 FD
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.LP
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.KS
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.TA .5i 3i
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.ta .5i 3i
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.nf
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.de FN
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.fi
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.KE
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.LP
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.de IN \" send an index entry to the stderr
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..
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.de C{
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.KS
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.ie "\\*(.T"480" .ft L
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.de C}
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.DE
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.R
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.de Pn
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.de ZN
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.el \fI\^\\$1\^\fP\\$2
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..
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.de NT
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.ne 7
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.ds NO Note
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.if \\n(.$>$1 .if !'\\$2'C' .ds NO \\$2
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.R
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..
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. \" Note End -- doug kraft 3/85
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.de NE
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..
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.ny0
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.TH XtCallCallbacks 3Xt "Release 3" "X Version 11" "XT FUNCTIONS"
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.SH NAME
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XtCallCallbacks, XtHasCallbacks \- process callbacks
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.SH SYNTAX
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void XtCallCallbacks(\fIw\fP, \fIcallback_name\fP, \fIcall_data\fP)
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.br
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Widget \fIw\fP;
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.br
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String \fIcallback_name\fP;
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.br
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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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.sp
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XtCallbackStatus XtHasCallbacks(\fIw\fP, \fIcallback_name\fP)
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.br
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Widget \fIw\fP;
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.br
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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 \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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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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