Bug 421039

Summary:	Unwanted velocity and bounce effects / option to disable all animations
Product:	[Applications] okular	Reporter:	nfxjfg
Component:	general	Assignee:	Okular developers <okular-devel>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	gwarser, nfxjfg
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:

Description nfxjfg 2020-05-05 06:46:02 UTC

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.)

Comment 1 David Hurka 2020-05-05 17:45:31 UTC

I agree with all your points. We both are the minority of users which is pissed of of smooth scrolling, probably more than the majority of users is pleased by it.

There is a discussion to reimplement smooth scrolling, respecting user feedback, and to respect the global animation setting. You can enable or disable animations for the GUI theme, but probably only on Plasma.

*** This bug has been marked as a duplicate of bug 420755 ***