[okular] [Bug 421039] New: Unwanted velocity and bounce effects / option to disable all animations

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=421039

            Bug ID: 421039
           Summary: Unwanted velocity and bounce effects / option to
                    disable all animations
           Product: okular
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: nfxjfg at gmail.com
  Target Milestone: ---

SUMMARY

I need an option to disable all animations or related things.

STEPS TO REPRODUCE

- Dragging with the mouse and then releasing makes the viewed document keep
moving until it decelerates to a halt. This is unwanted. The document should
never ever move on its own.
- Doing this with a "high" magnitude makes the document move significantly and
even bounce off the borders. It's like it's some sort of game (pinball?). This
is unwanted. I want to view the document at the point where I stopped dragging,
not somewhere else or even the next page. It's not a game either.
- It allows you to drag the document out of bounds, and moves back when you
release the mouse. This is unwanted. I have to admit this behavior freaks me
out. If I wanted it, I'd use macOS or something.
- When scrolling with the keyboard, it does some sort of soft scrolling effect.
This is unwanted. I want it to scroll instantly, not bother me with a fraction
of second of waiting.
- (This is an old one.) When searching with Edit->Find, it does an animated
scroll to the next page. This is unwanted. It's pointless, makes search take
longer, and if this was intended as eye candy, it doesn't even work, because
rendering is often not fast enough.

OBSERVED RESULT

Forced "slowness", UX annoyance, possibly higher CPU usage (possibly energy
usage and battery depletion if on laptop).

EXPECTED RESULT

Instant, fast UI reaction.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Linux without DE
KDE Plasma Version: unknown
KDE Frameworks Version: 5.62.0
Qt Version: 5.12.4
PDF Backend: 0.6.5
Okular: 1.10.0

(Not sure when this started to happen; some time after a distro update.)

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