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;
void XtInsertEventHandler(w, event_mask, nonmaskable, proc, client_data, position) Widget w; EventMask event_mask; Boolean nonmaskable; XtEventHandler proc; XtPointer client_data; XtListPosition position;
void XtInsertRawEventHandler(w, event_mask, nonmaskable, proc, client_data, position) Widget w; EventMask event_mask; Boolean nonmaskable; XtEventHandler proc; XtPointer client_data; XtListPosition position;
typedef enum { XtListHead, XtListTail } XtListPosition;
The XtRemoveEventHandler stops the specified procedure from being called in response to the specified events. A handler is removed if both the procedure proc and client_data match a registered handler/data pair.
The XtRemoveRawEventHandler 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 XSelectInput.
The XtInsertEventHandler is identical to XtAddEventHandler with the additional position argument. if position is XtListHead, the event handler is registered to that it will be called before any event handlers that were previously registered for the same widget. If position is XtListTail, the event handler is registered to be called after any previously registered event handlers. If the procedure is already registered with the same client_data value, the specified mask augments the existing mask and the procedure is repositioned in the list.
XtInsertRawEventHandler is similar to XtInsertEventHandler except that it does not modify the widget's event mask and never causes an XSelectInput for the specified events. If the procedure is already registered with the same client_data value, the specified mask augments the existing mask and the procedure is repositioned in the list.
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface