226 lines
4.7 KiB
Plaintext
226 lines
4.7 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<=39 .vs \\n(VSp
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.de De
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.ce 0
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.nr BD 0
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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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.de C{
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.ne 7
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. \" Note End -- doug kraft 3/85
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..
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.ny0
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.TH XtAddEventHandler 3Xt "Release 3" "X Version 11" "XT FUNCTIONS"
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.SH NAME
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XtAddEventHandler, XtAddRawEventHandler, XtRemoveEventHandler, XtRemoveRawEventHandler \- add and remove event handlers
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.SH SYNTAX
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void XtAddEventHandler(\fIw\fP, \fIevent_mask\fP, \fInonmaskable\fP, \
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\fIproc\fP, \fIclient_data\fP)
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.br
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Widget \fIw\fP;
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.br
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EventMask \fIevent_mask\fP;
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.br
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Boolean \fInonmaskable\fP;
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.br
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XtEventHandler \fIproc\fP;
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.br
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XtPointer \fIclient_data\fP;
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.LP
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void XtAddRawEventHandler(\fIw\fP, \fIevent_mask\fP, \fInonmaskable\fP, \
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\fIproc\fP, \fIclient_data\fP)
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.br
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Widget \fIw\fP;
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.br
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EventMask \fIevent_mask\fP;
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.br
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Boolean \fInonmaskable\fP;
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.br
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XtEventHandler \fIproc\fP;
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.br
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XtPointer \fIclient_data\fP;
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.LP
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void XtRemoveEventHandler(\fIw\fP, \fIevent_mask\fP, \fInonmaskable\fP, \
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\fIproc\fP, \fIclient_data\fP)
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.br
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Widget \fIw\fP;
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.br
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EventMask \fIevent_mask\fP;
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.br
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Boolean \fInonmaskable\fP;
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.br
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XtEventHandler \fIproc\fP;
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.br
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XtPointer \fIclient_data\fP;
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.LP
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void XtRemoveRawEventHandler(\fIw\fP, \fIevent_mask\fP, \fInonmaskable\fP, \
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\fIproc\fP, \fIclient_data\fP)
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.br
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Widget \fIw\fP;
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.br
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EventMask \fIevent_mask\fP;
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.br
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Boolean \fInonmaskable\fP;
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.br
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XtEventHandler \fIproc\fP;
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.br
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XtPointer \fIclient_data\fP;
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.SH ARGUMENTS
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.IP \fIclient_data\fP 1i
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Specifies additional data to be passed to the client's event handler.
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.ds Em to call or unregister this procedure
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.IP \fIevent_mask\fP 1i
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Specifies the event mask for which \*(Em.
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.ds Nm called or removed
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.IP \fInonmaskable\fP 1i
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Specifies a Boolean value that indicates whether this procedure should be
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\*(Nm on the nonmaskable events
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.Pn ( GraphicsExpose ,
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.ZN NoExpose ,
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.ZN SelectionClear ,
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.ZN SelectionRequest ,
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.ZN SelectionNotify ,
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.ZN ClientMessage ,
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and
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.ZN MappingNotify ).
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.ds Pr \ to be added or removed
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.IP \fIproc\fP 1i
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Specifies the procedure that is\*(Pr.
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.ds Wi for which this event handler is being registered
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.IP \fIw\fP 1i
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Specifies the widget \*(Wi.
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.SH DESCRIPTION
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The
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.ZN XtAddEventHandler
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function registers a procedure with the dispatch mechanism that is
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to be called when an event that matches the mask occurs on the specified
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widget.
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If the procedure is already registered with the same client_data,
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the specified mask is ORed into the existing mask.
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If the widget is realized,
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.ZN XtAddEventHandler
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calls
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.ZN XSelectInput ,
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if necessary.
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.LP
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The
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.ZN XtAddRawEventHandler
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function is similar to
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.ZN XtAddEventHandler
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except that it does not affect the widget's mask and never causes an
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.ZN XSelectInput
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for its events.
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Note that the widget might already have those mask bits set
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because of other nonraw event handlers registered on it.
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.LP
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The
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.ZN XtAddRawEventHandler
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function is similar to
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.ZN XtAddEventHandler
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except that it does not affect the widget's mask and never causes an
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.ZN XSelectInput
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for its events.
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Note that the widget might already have those mask bits set
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because of other nonraw event handlers registered on it.
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.LP
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The
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.ZN XtRemoveRawEventHandler
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function stops the specified procedure from receiving the specified events.
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Because the procedure is a raw event handler,
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this does not affect the widget's mask and never causes a call on
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.ZN XSelectInput .
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.SH "SEE ALSO"
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XtAppNextEvent(3Xt),
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XtBuildEventMask(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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