Maybe you can add an event filter and remove some of the events if they are
happening too close to each others. But I thing doing that logic into the event
handler is a betetr idea, where you can either cumulate and delay execution of
the behavior.
-Original Message-
From: Interest On Behalf Of Giuseppe D'Angelo
via Interest
Sent: November 5, 2020 5:06 AM
To: interest@qt-project.org
Subject: Re: [Interest] how to get and purge events from queue?
Il 05/11/20 05:38, David M. Cotter ha scritto:
> when scrolling, the scroll for my app is a bit sluggish (do not ask
> about that) which means that mouse wheel scroll events can pile up in the
> queue while the first scroll event is being processed.
> meaning that a dozen more*slow* events get handled after the user stops
> scrolling.
>
> what i want to do is: when i get a wheel scroll event, at that moment i see
> if there are MORE scroll events in the queue. if not, i just handle this
> event. but if there ARE i want to get the most recent one, and handle only
> that ONE event, while purging the rest.
There is some sort of input event compression available through application
flags. For the rest, you could just not act on events that happen too close
together (either wait a bit before acting, so to get N events, or act on the
first one and ignore the subsequent ones in a short time frame).
But there's just no public access to the pending event queue.
HTH,
--
Giuseppe D'Angelo | giuseppe.dang...@kdab.com | Senior Software Engineer KDAB
(France) S.A.S., a KDAB Group company Tel. France +33 (0)4 90 84 08 53,
http://www.kdab.com KDAB - The Qt, C++ and OpenGL Experts
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