xtapppending(3) [hpux man page]

XtAppPending()															    XtAppPending()

Name
  XtAppPending - determine whether any events are in an application's input queue.

Synopsis
  XtInputMask XtAppPending(app_context)
	 XtAppContext app_context;

Inputs
  app_context
	    Specifies the application context.

Returns
  An XtInputMask which indicates what kind of events, if any, are pending on app_context.

Description
  XtAppPending() returns a nonzero value if there are pending events from the X server, timer, or other input sources.

  The  return  value is a bit mask that is the OR of XtIMXEvent (an X event), XtIMTimer (a timer event-see XtAppAddTimeOut()), and XtIMAlter-
  nateInput (an alternate input event-see XtAppAddInput()).  As a convenience, the symbolic name XtIMAll is defined as the bitwise  inclusive
  OR  of all event types.  If no events are pending, XtAppPending() flushes the output buffers of each display in the application context and
  returns zero.  This call is the Intrinsics equivalent to the Xlib call XPending().

  XtAppPending() never blocks.

Usage
  Programs rarely need this much control over the event dispatching mechanism.	Most programs use XtAppMainLoop().

Structures
  The XtInputMask type and its possible values are defined as follows:

     typedef unsigned long    XtInputMask;

     #define XtIMXEvent 	     1
     #define XtIMTimer		     2
     #define XtIMAlternateInput      4
     #define XtIMAll (XtIMXEvent   XtIMTimer   XtIMAlternateInput)

See Also
  XtAppAddInput(1), XtAppAddTimeOut(1), XtAppMainLoop(1), XtAppNextEvent(1), XtAppPeekEvent(1), XtAppProcessEvent(1), XtDispatchEvent(1).

Xt - Event Handling														    XtAppPending()

XtAppProcessEvent()													       XtAppProcessEvent()

Name
  XtAppProcessEvent - get and process one input event of a specified type.

Synopsis
  void XtAppProcessEvent(app_context, mask)
	 XtAppContext app_context;
	 XtInputMask mask;

Inputs
  app_context
	    Specifies the application context for which to process events.

  mask	    Specifies what types of events to process.

Description
  XtAppProcessEvent()  processes  one X event, alternate input source event or timer event in app_context.  The mask argument specifies which
  types of events are to be processed; it is the bitwise inclusive OR ( ) of any of the values XtIMXEvent, XtIMTimer, or  XtIMAlternateInput,
  or the value XtIMAll which specifies all three event types.

  If  there  is  no  event  or	input  of  the	appropriate type to process, if there is a background work procedure registered (see XtAppAd-
  dWorkProc()) XtAppProcessEvent() calls that procedure and checks again for input from all specified  sources.   If  there  are  no  pending
  events and no work procedures registered, XtAppProcessEvent() blocks until an event of one of the specified types occurs.

  If  X  events  are specified in mask, and no events are immediately available, XtAppProcessEvent() flushes the output buffer of each of the
  Displays in app_context.  If there is more than one of the requested types of input available, it is undefined which will be processed.

  XtAppProcessEvent() handles timer and alternate input events by calling the callback procedures registered for those events  (see  XtAppAd-
  dTimeOut()  and XtAppAddInput()).  It handles X events by passing them to XtDispatchEvent().	XtDispatchEvent() handles an event by passing
  it to the appropriate event handlers (see XtAddEventHandler()) or to the Translation Manager (which is itself an event handler).

Usage
  Programs rarely need this much control over the event dispatching mechanism.	Most programs use XtAppMainLoop().

Structures
  The XtInputMask type and its possible values are defined as follows:

     typedef unsigned long    XtInputMask;

     #define XtIMXEvent 	     1
     #define XtIMTimer		     2
     #define XtIMAlternateInput      4
     #define XtIMAll (XtIMXEvent   XtIMTimer   XtIMAlternateInput)

See Also
  XtAppAddInput(1), XtAppAddTimeOut(1), XtAppAddWorkProc(1), XtAppMainLoop(1), XtAppNextEvent(1), XtAppPeekEvent(1), XtAppPending(1), XtDis-
  patchEvent(1).

Xt - Event Handling													       XtAppProcessEvent()