[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[Peter Ped Helcmanovsky]

https://bugs.kde.org/show_bug.cgi?id=384695

Peter Ped Helcmanovsky  changed:

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 CC||p...@7gods.org

--- Comment #12 from Peter Ped Helcmanovsky  ---
I somehow have "shift" in muscle memory too, even as 15+years KDE Plasma daily
user (no idea how it happened, I'm confused by it too).

So I would really love it becoming global Plasma option I can flip from alt to
shift, so I guess it needs https://bugreports.qt.io/browse/QTBUG-75949 first
(resolved by adding it as new option I guess - I don't think it's good to
change default without doing some serious survey between user, but I would be
completely satisfied by option).

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[RM]

https://bugs.kde.org/show_bug.cgi?id=384695

RM  changed:

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 CC||r...@richardmay.net

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[jade]

https://bugs.kde.org/show_bug.cgi?id=384695

jade  changed:

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 CC||k...@lfcode.ca

--- Comment #11 from jade  ---
Andrew: I have filed a bug on qt about the not-very-related Wayland issue, as
it appears that the problem is that qt simply did not implement horizontal
scrolling on Wayland at all. You can confirm with launching Okular with
`XDG_SESSION_TYPE=x11 okular`

https://bugreports.qt.io/browse/QTBUG-118618

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[Andrew Shark]

https://bugs.kde.org/show_bug.cgi?id=384695

--- Comment #10 from Andrew Shark  ---
On Wayland the Alt modifier has no effect. On X11 it allows to scroll
horizontally.
On both session types you can scroll horizontally with horizontal wheel.

Operating System: Arch Linux
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.107.0
Qt Version: 5.15.10
Okular: 23.04.3

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[Matt Whitlock]

https://bugs.kde.org/show_bug.cgi?id=384695

--- Comment #9 from Matt Whitlock  ---
(In reply to sevens from comment #7)
> Current behavior of `Shift+Wheel` (scroll an entire screen's worth of
> content[…]) is also useful IMO but could maybe use a different shortcut?

Personally, I would like to see the effects of Shift and Alt (on scrolling
behavior of Qt/KDE applications) reversed from what they are now. Shift should
scroll the alternative axis, and Alt should activate speed scrolling. That
would then agree with every other GUI toolkit.

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[Matt Whitlock]

https://bugs.kde.org/show_bug.cgi?id=384695

Matt Whitlock  changed:

   What|Removed |Added

 CC||k...@mattwhitlock.name

--- Comment #8 from Matt Whitlock  ---
This behavior comes from Qt. Specifically, QXcbConnection transposes the native
wheel event's scroll deltas when populating the QWheelEvent's angleDelta if the
Alt modifier key is held. (Search
https://github.com/qt/qtbase/blob/dev/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp
for "angleDelta.transposed()".) Then, much further down the line, QScrollView
reads the angleDelta from the QWheelEvent and fires appropriate signals to the
relevant scroll bar(s). So, any new configuration option would need to affect
which modifier key QXcbConnection tests for while translating the native wheel
events. In short, this is not the responsibility of KDE or of QScrollView but
rather of QXcbConnection, which lives in QtBase.

See this Qt bug: https://bugreports.qt.io/browse/QTBUG-75949

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[sevens]

https://bugs.kde.org/show_bug.cgi?id=384695

--- Comment #7 from sevens  ---
Would also prefer more consistent handling of horizontal scrolling between apps
and toolkits, both for Okular specific and other KDE/Qt apps in general.

Current behavior of `Shift+Wheel` (scroll an entire screen's worth of content,
where regular wheel may not, depending on global settings?  For me regular
wheel scrolls a few lines) is also useful IMO but could maybe use a different
shortcut?

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[sevens]

https://bugs.kde.org/show_bug.cgi?id=384695

sevens  changed:

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 CC||pe...@opzninges.nl

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[pepe]

https://bugs.kde.org/show_bug.cgi?id=384695

pepe  changed:

   What|Removed |Added

Version|unspecified |22.08.1
 CC||alh...@gmail.com
 OS|Linux   |All
   Platform|Ubuntu  |unspecified

--- Comment #6 from pepe  ---
I observed that Okular on Windows has configurable keyboard shortcuts to scroll
up/down, why not for left/right? I always need to zoom a page to be able to
read comfortably with my eyesight, so I often need to scroll to read the other
columns, or see the figure, or read the other page when I'm on double page
mode, etc.

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=384695

tomash...@gmail.com changed:

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[Ashark]

https://bugs.kde.org/show_bug.cgi?id=384695

Ashark  changed:

   What|Removed |Added

 CC||ash...@linuxcomp.ru

--- Comment #5 from Ashark  ---
> Right now it is possible using ALT
> I didn't even realize that Alt+wheel is what Okular uses until I saw this bug.
The same here. But it's good to know that for now it is at least doable with
kayboard + wheel instead of dragging scroller.

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[David Hurka]

https://bugs.kde.org/show_bug.cgi?id=384695

--- Comment #4 from David Hurka  ---
I can’t find where Okular could handle the Alt key, so I think this is handled
in Qt. But it is not documented in QWheelEvent or QScroller, and I can’t find
it in Qt::ApplicationAttributes. Upstream bug?

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[Roy]

https://bugs.kde.org/show_bug.cgi?id=384695

Roy  changed:

   What|Removed |Added

 CC||roy-orbi...@devo.net.au

--- Comment #3 from Roy  ---
I'm not sure this is limited to Okular. Horizontal scrolling in many KDE
settings dialogues, Dolphin, etc. is achieved with with Alt +.

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=384695

colinder...@gmail.com changed:

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[Frederick Eaton]

https://bugs.kde.org/show_bug.cgi?id=384695

Frederick Eaton  changed:

   What|Removed |Added

 CC||frede...@ofb.net

--- Comment #2 from Frederick Eaton  ---
I would like to second this. Shift+wheel is what I use in Firefox (with some
configuration). I didn't even realize that Alt+wheel is what Okular uses until
I saw this bug. I don't understand what Shift+wheel is doing in Okular but it
seems not useful - it scrolls diagonally, and rotating the wheel in the
opposite direction doesn't return me to where I was. I would expect opposing
arrow keys and opposing scroll wheel motions to have opposite effects, that's
pretty much a fundamental principle of document navigation. I had just assumed
the software was broken.

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[Kenneth Hanson]

https://bugs.kde.org/show_bug.cgi?id=384695

Kenneth Hanson  changed:

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 CC||khanson...@gmail.com

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[Mina]

https://bugs.kde.org/show_bug.cgi?id=384695

Mina <842m...@gmail.com> changed:

   What|Removed |Added

 CC||842m...@gmail.com

--- Comment #1 from Mina <842m...@gmail.com> ---
Yes this is really bugging me too because I use Alt+scroll to control the
opacity of windows (it's configurable through the settings). Shift + scroll is
very standard. It's used in google chrome, vs code, most of ubuntu unity and
many others.

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[Simon Andric]

https://bugs.kde.org/show_bug.cgi?id=384695

Simon Andric  changed:

   What|Removed |Added

 CC||simonandr...@gmail.com

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[okular] [Bug 384695] Configurable horizontal scrolling key (ALT or SHIFT) + WHEEL

[Ilario Gottardello]

https://bugs.kde.org/show_bug.cgi?id=384695

Ilario Gottardello  changed:

   What|Removed |Added

Summary|Configurable horizontal |Configurable horizontal
   |scrilling key (ALT or   |scrolling key (ALT or
   |SHIFT) + WHEEL  |SHIFT) + WHEEL

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