xtinserteventhandler(1) [hpux man page]
XtInsertEventHandler() XtInsertEventHandler() Name XtInsertEventHandler - register an event handler procedure that receives events before or after all previously registered event handlers. Synopsis void XtInsertEventHandler(w, event_mask, nonmaskable, proc, client_data, position) Widget w; EventMask event_mask; Boolean nonmaskable; XtEventHandler proc; XtPointer client_data; XtListPosition position; Inputs w Specifies the widget for which this event handler is being registered. Must be of class core or any subclass thereof. event_mask Specifies the event mask for which to call this procedure. nonmaskable Specifies whether this procedure should be called on nonmaskable events proc Specifies the procedure that is to be called. client_data Specifies additional data to be passed to the client's event handler. position Specifies when the event handler is to be called relative to other previously registered handlers. Availability Release 4 and later. Description XtInsertEventHandler() registers the procedure proc and the data client_data with the Intrinsics event dispatching mechanism. When an event of one of the types set in event_mask occurs on the window of the widget w, proc will be invoked and client_data passed as one of its arguments. The argument position specifies where in the list of event handlers proc should be inserted. If it is XtListHead, proc will be inserted at the beginning of the list and will be called before all previously registered handlers. If it is XtListTail, proc will be inserted at the end of the list and will be called after all previously registered handlers. If the procedure is already registered with the same client_data, the specified event_mask augments the existing mask, and the procedure is repositioned in the list according to position. XtInsertEventHandler() is identical to XtAddEventHandler() with the additional position argument. See XtAddEventHandler() for more infor- mation. See XtEventHandler(2) for an explanation of how to write an event handler procedure. Usage Neither applications nor widgets often need to use event handlers. Using action procedures and translation tables provides a more flexible way to respond to input events. Structures The XtListPosition type is as follows. typedef enum { XtListHead, XtListTail } XtListPosition; See XtAddEventHandler() for a list of bits that can be set in the event_mask argument. See Also XtAddEventHandler(1), XtAddRawEventHandler(1), XtInsertRawEventHandler(1), XtRemoveEventHandler(1), XtRemoveRawEventHandler(1). Xt - Event Handling XtInsertEventHandler()
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XtInsertRawEventHandler() XtInsertRawEventHandler() Name XtInsertRawEventHandler - register an event handler procedure that receives events before or after all previously registered event han- dlers, without selecting for the events. Synopsis void XtInsertRawEventHandler(w, event_mask, nonmaskable, proc, client_data, position) Widget w; EventMask event_mask; Boolean nonmaskable; XtEventHandler proc; XtPointer client_data; XtListPosition position; Inputs w Specifies the widget for which this event handler is being registered. Must be of class Core or any subclass thereof. event_mask Specifies the event mask for which to call this procedure. nonmaskable Specifies a Boolean value that indicates whether this procedure should be called on nonmaskable events proc Specifies the procedure that is to be registered. client_data Specifies additional data to be passed to the client's event handler. position Specifies when the event handler is to be called relative to other previously registered handlers. Availability Release 4 and later. Description XtInsertRawEventHandler() registers the procedure proc and the data client_data with the Intrinsics event dispatching mechanism. When an event of one of the types set in event_mask occurs on the window of the widget w, proc will be invoked and client_data passed as one of its arguments. XtInsertRawEventHandler() never calls XSelectInput() to request to receive the events in event_mask. The argument position specifies where in the list of event handlers proc should be inserted. If it is XtListHead, proc will be inserted at the beginning of the list and will be called before all previously registered handlers. If it is XtListTail, proc will be inserted at the end of the list and will be called after all previously registered handlers. If the procedure is already registered with the same client_data, the specified event_mask augments the existing mask, and the procedure is repositioned in the list according to position. XtInsertRawEventHandler() is identical to XtAddRawEventHandler() with the additional position argument. See XtAddRawEventHandler() for more information. See XtEventHandler(2) for an explanation of how to write an event handler procedure. Usage Neither applications nor widgets often need to use event handlers. Using action procedures and translation tables provides a more flexible way to respond to input events. Structures The XtListPosition type is as follows. typedef enum { XtListHead, XtListTail } XtListPosition; See XtAddEventHandler() for a list of bits that can be set in the event_mask argument. See Also XtAddEventHandler(1), XtAddRawEventHandler(1), XtBuildEventMask(1), XtInsertEventHandler(1), XtRemoveEventHandler(1), XtRemoveRawEven- tHandler(1). Xt - Event Handling XtInsertRawEventHandler()