[Interest] Pressing key (A-Z) behaves differently the pressing modifiers..

[George Tasopoulos]

This is intended, and it's because when typing you'd expect keeping a
letter key pressed to keep producing that letter (I'm not sure about
Function keys though). Modifier keys don't have that functionality because
you normally press them combined with another key and so you need them to
"stay" pressed.

Look at this function:
http://qt-project.org/doc/qt-5/qkeyevent.html#isAutoRepeat
For non-modifier keys and not key combinations, it should return true when
an event comes from that behaviour and so you can use it to screen for it
and ignore extra events.

--
Yours sincerely,
George Tasopoulos


On 1 January 2014 16:15, Mark Gaiser <markg85 at gmail.com> wrote:

> Hi,
>
> I guess this will end up being a bug report, but i don't really if the
> results i see is a bug or intended behavior. Thus asking on the list
> to make sure before i make a bug report.
>
> I'm playing with a custom event filter and am observing some weird
> behavior with key presses.
>
> If i press and hold a normal key (a-z, F1 - F12, .. non modifier keys)
> then Qt's event filter acts like i'm rapidly pressing and releasing
> it. For example lets take the "A" key in a normal press/release
> situation.
>
> Press A:
> Event 6 (KeyPress) emits
> -- some other events
> Event 7 (KeyRelease) emits
>
> That's fine, as one would expect.
>
> Now if i keep it pressed i see:
> Event 6 (KeyPress) emits
> -- some other events
> Event 7 (KeyRelease) emits
> Event 6 (KeyPress) emits
> -- some other events
> Event 7 (KeyRelease) emits
> Event 6 (KeyPress) emits
> -- some other events
> Event 7 (KeyRelease) emits
> ... and so on.
>
> If i do the same with the CTRL key (press and hold it) then i don't
> get that and just get:
> Event 6 (KeyPress) emits
> -- some other events
> Event 7 (KeyRelease) emits
>
> What i see with the CTRL key is what i would expect, but why is the
> behavior different for other keys? Is this a bug or is this intended
> behavior and should i mimic "press and hold" by adding in a timer?
>
> Cheers,
> Mark
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> http://lists.qt-project.org/mailman/listinfo/interest
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.qt-project.org/pipermail/interest/attachments/20140101/c4a44df3/attachment.html>