XtAddEventHandler(3Xt) MIT X11R4 XtAddEventHandler(3Xt)
Name
XtAddEventHandler, XtAddRawEventHandler, XtRemoveEventHandler XtRemoveRawEventHandler - add and remove event handlers
Syntax
void XtAddEventHandler(w, event_mask, nonmaskable, proc, client_data)
Widget w;
EventMask event_mask;
Boolean nonmaskable;
XtEventHandler proc;
XtPointer client_data;
void XtAddRawEventHandler(w, event_mask, nonmaskable, proc, client_data)
Widget w;
EventMask event_mask;
Boolean nonmaskable;
XtEventHandler proc;
XtPointer client_data;
void XtRemoveEventHandler(w, event_mask, nonmaskable, proc, client_data)
Widget w;
EventMask event_mask;
Boolean nonmaskable;
XtEventHandler proc;
XtPointer client_data;
void XtRemoveRawEventHandler(w, event_mask, nonmaskable, proc, client_data)
Widget w;
EventMask event_mask;
Boolean nonmaskable;
XtEventHandler proc;
XtPointer client_data;
Arguments
client_data
Specifies additional data to be passed to the client's event handler.
event_mask
Specifies the event mask for which to call or unregister this procedure.
nonmaskable
Specifies a Boolean value that indicates whether this procedure should be called or removed on the nonmaskable events and
proc Specifies the procedure that is to be added or removed.
w Specifies the widget for which this event handler is being registered.
Description
The function registers a procedure with the dispatch mechanism that is to be called when an event that matches the mask occurs on the spec-
ified widget. If the procedure is already registered with the same client_data, the specified mask is ORed into the existing mask. If the
widget is realized, calls if necessary.
The function is similar to except that it does not affect the widget's mask and never causes an for its events. Note that the widget might
already have those mask bits set because of other nonraw event handlers registered on it.
The function is similar to except that it does not affect the widget's mask and never causes an for its events. Note that the widget might
already have those mask bits set because of other nonraw event handlers registered on it.
The function stops the specified procedure from receiving the specified events. Because the procedure is a raw event handler, this does
not affect the widget's mask and never causes a call on
See Also
XtAppNextEvent(3Xt), XtBuildEventMask(3Xt)
X Window System Toolkit: The Complete Programmer's Guide and Specification, Paul J. Asente and Ralph Swick
X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys
XtAddEventHandler(3Xt)
