| Re: Evenly timed events in a widget program [message #85865 is a reply to message #85864] |
Sun, 15 September 2013 09:45   |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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David Grier writes:
> I'm working on a widget program that resembles a TV screen with icons overlaid on the
> video. In my present implementation, a widget timer event triggers updates of the TV screen,
> while users interacting with the icons generate other widget events. My problem is that the timer
> events can get stacked up behind a great many user-generated events, causing the TV screen to
> update erratically.
>
> Is there a way to convince xmanager to act on timer events as soon as they
> arrive, rather than working its way systematically but indiscriminately through
> the stack of events?
>
> Alternatively, is there a way to run the TV widget as some sort of background process
> that runs on its own fixed schedule independent of the user interaction in the foreground?
>
> If the best answer is to ditch xmanager and to call widget_event directly,
> can anyone point me to an effectively written example that I might use as a
> model for my own code?
I would say the answer is probably no on all accounts. :-(
You can certainly clear events (CLEAR_EVENTS keyword to Widget_Control),
but it doesn't sound as though you really want to. The controls are
probably there for a reason. I don't know any way to force an event to
the head of the queue, like the VIP pass at Disney World does.
Running the TV widget as a background process is an interesting idea.
What if you wrote it as a widget object and then controlled it from the
IDL bridge? Doubt it will work, but I would be interested in the result
if you try it. :-)
Ditching the XManager is almost always a bad idea, fraught with
unexpected consequences, usually.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")
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