IBASE_FREE_EVENT_HANDLER(3) 1 IBASE_FREE_EVENT_HANDLER(3)ibase_free_event_handler - Cancels a registered event handlerSYNOPSIS
bool ibase_free_event_handler (resource $event)
DESCRIPTION
This function causes the registered event handler specified by $event to be cancelled. The callback function will no longer be called for
the events it was registered to handle.
PARAMETERS
o $event
- An event resource, created by ibase_set_event_handler(3).
RETURN VALUES
Returns TRUE on success or FALSE on failure.
SEE ALSO ibase_set_event_handler(3).
PHP Documentation Group IBASE_FREE_EVENT_HANDLER(3)
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XtInsertEventTypeHandler(3X) XT FUNCTIONS XtInsertEventTypeHandler(3X)NAME
XtInsertEventTypeHandler - extension event handling
SYNTAX
void XtInsertEventTypeHandler(widget, event_type, select_data, proc, client_data, position)
Widget widget;
int event_type;
XtPointer select_data;
XtEventHandler proc;
XtPointer client_data;
XtListPosition position;
ARGUMENTS
widget Specifies the widget for this event handler. Must be of class Core or any subclass thereof.
event_type
Specifies the event type.
select_data
Specifies data used to select or deselect events from the server.
proc Specifies the proc.
client_data
Specifies additional data to be passed to the event handler.
position Specifies when the event handler is to be called relative to other previously registered handlers.
DESCRIPTION
The XtInsertEventTypeHandler function registeres a procedure with the dispatch mechanism that is to be called when an event that matches
the specified event_type is dispatched to the specified widget.
If event_type is one of the core X protocol events then select_data must be a pointer to a value of type EventMask, indicating the event
mask to be used to select for the desired event. This event mask will be included in the value returned by XtBuildEventMask. If the wid-
get is realized XtInsertEventTypeHandler calls XSelectInput if necessary. Specifying NULL for select_data is equivalent to specifying a
pointer to an event mask containing 0. This is similar to the XtInsertRawEventHandler function.
If event_type specifies an extension event type then the semantics of the data pointed to by select_data are defined by the extension
selector registered for the specified event type.
In either case the Intrinsics are not required to copy the data pointed to by select_data, so the caller must ensure that it remains valid
as long as the event handler remains registered with this value of select_data.
The position argument allows the client to control the order of the invocation of event handlers registered for the same event type. If the
client does not care about the order, it should normally specify XtListTail, which registers this event handler after any previously regis-
tered handlers for this event type.
SEE ALSO XtEventHandlerProc(3X)XtGetKeyboardFocusWidget(3X), XtRemoveEventTypeHandler(3X), XtRegisterExtensionSelector(3X), XtSetEventDis-
patcher(3X), XtDispatchEventToWidget(3X)X Version 11 Release 6 XtInsertEventTypeHandler(3X)
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